JP2021055923A - Fuel identification system, control system, solid fuel pulverization device and fuel identification method - Google Patents

Abstract

To provide a fuel identification system that can efficiently recover a tag mixed into a solid fuel, and to provide a control system, a solid fuel pulverization device and a fuel identification method.SOLUTION: A fuel identification system for multiple types of solid fuel to be fed into a pulverization unit 10 in a solid fuel pulverization device includes: a detector 51 for detecting identification information that is preset to a tag T mixed into a solid fuel and sortable from the solid fuel before the solid fuel is fed to the pulverization unit 10; a recovery unit 52 for recovering the tag T from the solid fuel.SELECTED DRAWING: Figure 2

Description

The present disclosure relates to fuel identification systems, control systems and solid fuel grinders, and fuel identification methods.

Conventionally, a solid fuel (carbon-containing solid fuel) such as coal or biomass fuel is crushed into fine powder within a predetermined particle size range by a crusher (mill) and supplied to a combustion apparatus. The mill crushes solid fuel such as coal and biomass fuel charged into the rotary table by sandwiching it between the rotary table and rollers. Then, the fine powder fuel that has been crushed into fine powder by the transport gas supplied from the outer circumference of the rotary table is sorted by a classifier in a predetermined particle size range, transported to a boiler, and burned by a combustion device. There is. In a thermal power plant, steam is generated by heat exchange with the combustion gas generated by burning in a boiler, the steam turbine is rotationally driven by the steam, and the generator connected to the steam turbine is rotationally driven to generate electricity. Is done.

As described above, a power plant may use a plurality of types of solid fuels. Patent Document 1 and Patent Document 2 disclose that an ID tag is mixed with a solid fuel and used for operation control of a boiler.

Japanese Unexamined Patent Publication No. 2004-239533 Japanese Patent No. 4153927

In recent years, carbon-neutral biomass fuels (for example, wood-based pellets) have been used more and more due to carbon dioxide emission regulations, and cases of co-firing coal and biomass fuels are increasing. At that time, it is uneconomical to provide dedicated mills for coal and biomass fuel, so it is required that one mill can switch to the operation setting suitable for each solid fuel of coal and biomass fuel and crush. There is. Further, even when different solid fuels such as coal and biomass fuel are switched and operated by one mill, it is required that the structure of the mill is common and that it can be used without modification. In this way, mills are increasingly required to support multiple types of solid fuels.

When dealing with a plurality of types of solid fuels, it is necessary to crush each solid fuel with a mill, but each solid fuel has different crushing characteristics, for example, coal and biomass fuel. For example, biomass fuels such as wood chips have the property of being more difficult to crush than coal due to their fibrous nature. On the other hand, since biomass fuel can be burned even with crushed fuel having a larger particle size range than coal, it is discharged from the mill with a larger particle size range than coal. However, when the type of solid fuel charged into the mill is significantly changed, the mill is temporarily stopped, the fuel remaining in the mill is discharged to the outside, and then the operation setting of the mill is changed and restarted. In some cases, processing such as starting up was performed to suppress the destabilization of the properties of the pulverized fuel due to the mixing of the solid fuel. In such a case, the operating rate of the mill temporarily decreases (the number of mills operated decreases due to the temporary suspension of operation of a part of the mill), which may lead to a decrease in the output of the boiler.

Regarding the condition monitoring of the supplied solid fuel, Patent Document 1 and Patent Document 2 disclose that a tag such as RFID is used. However, in order to continuously monitor the state of the solid fuel, a large number of tags to be mixed with the solid fuel are required, which is uneconomical. For example, according to Document 2, the number of tags to be mixed is about 10 per ton of coal, and a large thermal power plant that consumes about 10,000 tons / day requires a large amount of tags of 100,000 / day. It becomes.

The present disclosure has been made in view of such circumstances, and is a fuel identification system, a control system, and a solid fuel crusher capable of efficiently recovering tags mixed in solid fuel for reuse. , As well as a fuel identification method.

The first aspect of the present disclosure is a fuel identification system for a plurality of types of solid fuels supplied from a fuel supply unit to a crushing unit in a solid fuel crushing apparatus, and before the solid fuel is supplied to the crushing unit. A fuel identification system including a detection unit that detects identification information preset in a tag body that is mixed with the solid fuel and can be separated from the solid fuel, and a recovery unit that recovers the tag body from the solid fuel. Is.

The second aspect of the present disclosure is a fuel identification method for a plurality of types of solid fuels supplied from a fuel supply unit to a crushing unit in a solid fuel crushing apparatus, and before the solid fuel is supplied to the crushing unit. It is a fuel identification method including a step of detecting identification information preset in a tag body that is mixed with the solid fuel and can be separated from the solid fuel, and a step of recovering the tag body from the solid fuel. ..

According to the present disclosure, there is an effect that the tag body mixed in the solid fuel can be efficiently recovered for reuse.

It is a block diagram which shows the solid fuel crushing apparatus and the boiler which concerns on 1st Embodiment of this disclosure. It is a figure which showed the detailed configuration example of the fuel supply to the mill which concerns on 1st Embodiment of this disclosure. It is a figure which showed the structural example of the tag body which concerns on 1st Embodiment of this disclosure. It is a figure which shows the coal transportation route which concerns on 1st Embodiment of this disclosure. It is a hardware block diagram of the control part which concerns on 1st Embodiment of this disclosure. It is a figure which shows the detection example of the tag body which concerns on 1st Embodiment of this disclosure, and the control state of each control target. It is a figure which showed the flowchart of the control by the tag body detection which concerns on 1st Embodiment of this disclosure. It is a figure which showed the detailed configuration example of the fuel supply to the mill which concerns on 2nd Embodiment of this disclosure. It is a figure which shows the detection example of the tag body which concerns on 2nd Embodiment of this disclosure, and the control state of each control target. It is a perspective view which shows the detailed structural example in the bunker which concerns on 3rd Embodiment of this disclosure. It is sectional drawing of the banker which concerns on 3rd Embodiment of this disclosure. It is a vertical sectional view of the bunker which concerns on 3rd Embodiment of this disclosure.

[First Embodiment]
Hereinafter, the fuel identification system, the control system, the solid fuel crusher, and the first embodiment of the fuel identification method according to the present disclosure will be described with reference to the drawings. In this embodiment, the case where the fuel identification system is applied to the solid fuel crusher 100 of the power plant 1 will be described.

The power plant 1 according to the present embodiment includes a solid fuel crusher 100 and a boiler 200.

The solid fuel crusher 100 of the present embodiment crushes a solid fuel (carbon-containing solid fuel) such as coal or biomass fuel as an example, generates fine pulverized fuel, and supplies it to the burner portion (combustion device) 220 of the boiler 200. It is a device. The power plant 1 including the solid fuel crushing device 100 and the boiler 200 shown in FIG. 1 includes one solid fuel crushing device 100, and corresponds to each of the plurality of burner portions 220 of the one boiler 200. The system may be provided with a plurality of solid fuel crushing devices 100.

The solid fuel crushing device 100 of the present embodiment includes a mill (crushing unit) 10, a coal feeder (fuel supply machine) 20, a blower unit (transport gas supply unit) 30, and a state detection unit (state detection device). 40 and a control unit (control device) 60 are provided.
In the present embodiment, "upper" means the direction of the vertically upper side, and "upper" such as the upper part and the upper surface means the part on the vertically upper side. Similarly, "bottom" indicates the part on the vertically lower side.

The mill 10 for crushing solid fuel such as coal or biomass fuel supplied to the boiler 200 into pulverized fuel which is a pulverized solid fuel may be in the form of crushing only coal or crushing only biomass fuel. It may be in the form of crushing biomass fuel together with coal, and the type of solid fuel is not limited. Here, the biomass fuel is a renewable organic resource derived from living organisms, for example, thinned wood, waste wood, drifting wood, grass, waste, sludge, tires, and recycled fuel (pellets and pellets) made from these. Chips), etc., and are not limited to those presented here. Since biomass fuel takes in carbon dioxide during the growth process of biomass, it is considered to be carbon-neutral, which does not emit carbon dioxide, which is a global warming gas, and its use is being studied in various ways.

The mill 10 includes a housing 11, a rotary table (table) 12, a roller (crushing roller) 13, a drive unit 14, a rotary classifier (classifier) 16, a fuel supply unit 17, and a rotary classifier. It is provided with a motor 18 for rotationally driving the 16.
The housing 11 is formed in a tubular shape extending in the vertical direction, and is a housing that houses a rotary table 12, a roller 13, a rotary classifier 16, and a fuel supply unit 17. A fuel supply unit 17 is attached to the central portion of the ceiling portion 42 of the housing 11. The fuel supply unit 17 supplies the solid fuel guided from the bunker 21 into the housing 11, is arranged along the vertical direction at the center position of the housing 11, and the lower end portion extends to the inside of the housing 11. ing.

A drive unit 14 is installed near the bottom surface portion 41 of the housing 11, and a rotary table 12 that rotates by a driving force transmitted from the drive unit 14 is rotatably arranged.
The rotary table 12 is a member having a circular shape in a plan view, and is arranged so that the lower ends of the fuel supply unit 17 face each other. The upper surface of the rotary table 12 may have an inclined shape such that the central portion is low and the rotary table 12 is high toward the outside, and the outer peripheral portion may be bent upward. The fuel supply unit 17 supplies solid fuel (for example, coal or biomass fuel in this embodiment) from above to the lower rotary table 12. The rotary table 12 crushes the solid fuel supplied from the fuel supply unit 17 with the rollers 13, and is also called a crushing table.

When the solid fuel is charged from the fuel supply unit 17 toward the center of the rotary table 12, the solid fuel is guided to the outer peripheral side of the rotary table 12 by the centrifugal force due to the rotation of the rotary table 12, and is between the solid fuel and the roller 13. It is sandwiched and crushed. The crushed solid fuel is blown upward by the transport gas (hereinafter referred to as primary air) guided from the transport gas flow path (hereinafter referred to as primary air flow path) 100a, and rotates. It is led to the formula classifier 16. That is, an outlet (not shown) is provided on the outer periphery of the rotary table 12 to allow the primary air flowing in from the primary air flow path 100a to flow out into the space above the rotary table 12 in the housing 11. A vane (not shown) is installed at the air outlet to give a turning force to the primary air blown out from the air outlet. The primary air to which the swirling force is applied by the vane becomes an air flow having a swirling velocity component, and guides the solid fuel crushed on the rotary table 12 to the upper rotary classifier 16 in the housing 11. Of the crushed solid fuel mixed in the primary air, those having a particle size larger than the predetermined particle size are classified by the rotary classifier 16 or fall without reaching the rotary classifier 16 and fall on the rotary table. It is returned to 12 and crushed again with the roller 13.

The roller 13 is a rotating body that crushes the solid fuel supplied from the fuel supply unit 17 to the rotary table 12. The roller 13 is pressed against the upper surface of the rotary table 12 and cooperates with the rotary table 12 to crush the solid fuel. In FIG. 1, only one roller 13 is represented as a representative, but a plurality of rollers 13 are arranged to face each other at regular intervals in the circumferential direction so as to press the upper surface of the rotary table 12. To. For example, the three rollers 13 are arranged at equal intervals in the circumferential direction with an angular interval of 120 ° on the outer peripheral portion. In this case, the portion where the three rollers 13 are in contact with the upper surface of the rotary table 12 (the portion to be pressed) is equidistant from the rotation center axis of the rotary table 12.

The roller 13 can be swung up and down by the journal head 45, and is supported so as to be close to and separated from the upper surface of the rotary table 12. When the rotary table 12 rotates with the outer peripheral surface in contact with the upper surface of the rotary table 12, the roller 13 receives a rotational force from the rotary table 12 and rotates around the roller 13. When the solid fuel is supplied from the fuel supply unit 17, the solid fuel is pressed between the roller 13 and the rotary table 12 and crushed to become fine fuel.

The support arm 47 of the journal head 45 is supported on the side surface of the housing 11 by a support shaft 48 whose intermediate portion is along the horizontal direction so as to be swingable in the roller vertical direction around the support shaft 48. Further, a pressing device 49 is provided at the upper end portion on the vertically upper side of the support arm 47. The pressing device 49 is fixed to the housing 11 and applies a load (crushing load) to the roller 13 via the support arm 47 or the like so as to press the roller 13 against the rotary table 12.

The drive unit 14 is a device that transmits a driving force to the rotary table 12 to rotate the rotary table 12 around a central axis (rotary axis). The drive unit 14 generates a driving force for rotating the rotary table 12.

The rotary classifier 16 is provided on the upper part of the housing 11 and has a hollow substantially inverted conical outer shape. The rotary classifier 16 includes a plurality of blades 16a extending in the vertical direction at its outer peripheral position. The blades 16a are provided at predetermined intervals (equal intervals) around the central axis of the rotary classifier 16. Further, in the rotary classifier 16, the solid fuel crushed by the roller 13 is larger than a predetermined particle size (for example, 70 to 100 μm for coal) according to the rotation speed (classifier rotation speed) (hereinafter, a predetermined particle size). A device that classifies crushed solid fuel that exceeds the specified particle size into "coarse pulverized fuel") and one having a predetermined particle size or less (hereinafter, crushed solid fuel having a predetermined particle size or less is referred to as "fine pulverized fuel"). The rotary classifier 16 that classifies by rotation is also called a rotary separator, and is given a rotational driving force by a motor 18 controlled by a control unit 60 to provide a cylindrical shaft (not shown) extending in the vertical direction of the housing 11. It rotates around the fuel supply unit 17 in the center.

In the crushed solid fuel that has reached the rotary classifier 16, due to the relative balance between the centrifugal force generated by the rotation of the blade 16a and the centripetal force due to the airflow of the primary air, the coarse powder fuel having a large diameter is produced by the blade 16a. It is knocked down, returned to the turntable 12, crushed again, and the pulverized fuel is guided to an outlet 19 at the ceiling 42 of the housing 11.
The pulverized fuel classified by the rotary classifier 16 is discharged from the outlet 19 to the supply flow path 100b, and is conveyed to the subsequent process together with the primary air. The pulverized fuel that has flowed out to the supply flow path 100b is supplied to the burner portion 220 of the boiler 200.

The fuel supply unit 17 is attached so that the lower end portion extends vertically to the inside of the housing 11 so as to penetrate the upper end of the housing 11, and the solid fuel input from the upper part of the fuel supply unit 17 is transferred to the rotary table 12. Supply to the approximately central region of. The fuel supply unit 17 is supplied with solid fuel from the coal feeder 20.

The coal feeder 20 includes a transport unit 22 and a motor 23. The transport unit 22 transports the solid fuel discharged from the lower end portion of the down spout portion 24 directly under the bunker 21 by the driving force given from the motor 23, and is guided to the fuel supply unit 17 of the mill 10.
Normally, the primary air for transporting the pulverized solid fuel, which is a crushed solid fuel, is supplied to the inside of the mill 10 at a controlled air volume (primary air air volume), and the pressure is increased. Fuel is held in a laminated state inside the down spout portion 24, which is a pipe extending in the vertical direction directly under the bunker 21, and the solid fuel layer laminated in the down spout portion 24 causes the mill 10 side. The sealing property is ensured so that the primary air and fine fuel do not flow back.
The amount of solid fuel supplied to the mill 10 may be adjusted by the belt speed of the belt conveyor of the transport unit 22.

On the other hand, the biomass fuel chips and pellets before crushing have a constant particle size (the size of the pellets) as compared with coal fuel (that is, the particle size of coal before crushing is, for example, about 2 to 50 mm). Is, for example, about 6 to 8 mm in diameter and about 40 mm or less in length), and is lightweight. Therefore, when the biomass fuel is stored in the down spout portion 24, the gap formed between the biomass fuels becomes larger than that in the case of the coal fuel.
Therefore, since there is a gap between the biomass fuel chips and pellets in the down spout portion 24, the primary air blown up from the inside of the mill 10 and the fine powder fuel pass through the gap formed between the biomass fuels and the mill. 10 The internal pressure may drop. Further, when the primary air blows into the storage portion of the bunker 21, the transportability of the biomass fuel deteriorates and dust is generated, the bunker 21 and the down spout portion 24 are ignited, and when the pressure inside the mill 10 decreases, the pulverized fuel There is a possibility that various problems may occur in the operation of the mill 10, such as a decrease in the amount of fuel transported. Therefore, a rotary valve 53 (omitted in FIG. 1) may be provided in the middle of the fuel supply unit 17 from the coal feeder 20 to suppress the backflow due to the blow-up of the primary air and the pulverized fuel.

The blower unit 30 is a device that dries the solid fuel crushed by the rollers 13 and blows primary air into the housing 11 for supplying the rotary classifier 16.
In this embodiment, the blower unit 30 cools the primary air ventilator (PAF: Primary Air Fan) 31, the hot gas flow path 30a, and the cooling unit 30 in order to adjust the primary air blown to the housing 11 to an appropriate temperature. It includes a gas flow path 30b, a hot gas damper 30c, and a cold gas damper 30d.

In the present embodiment, the heat gas flow path 30a heats a part of the air (outside air) sent from the primary air ventilator 31 through a heat exchanger (heater) 34 such as an air preheater. It is supplied as heat gas. A hot gas damper 30c (first blower portion) is provided on the downstream side of the hot gas flow path 30a. The opening degree of the heat gas damper 30c is controlled by the control unit 60. The flow rate of the hot gas supplied from the hot gas flow path 30a is determined by the opening degree of the hot gas damper 30c.

The cold gas flow path 30b supplies a part of the air sent out from the primary air ventilator 31 as cold gas at room temperature. A cold gas damper (second blower) 30d is provided on the downstream side of the cold gas flow path 30b. The opening degree of the cold gas damper 30d is controlled by the control unit 60. The flow rate of the cold gas supplied from the cold gas flow path 30b is determined by the opening degree of the cold gas damper 30d.

In the present embodiment, the flow rate of the primary air is the total flow rate of the hot gas supplied from the hot gas flow path 30a and the flow rate of the cold gas supplied from the cold gas flow path 30b, and the temperature of the primary air is the hot gas. It is determined by the mixing ratio of the hot gas supplied from the flow path 30a and the cold gas supplied from the cold gas flow path 30b, and is controlled by the control unit 60.
Further, a part of the combustion gas discharged from the boiler 200 is guided to the hot gas supplied from the hot gas flow path 30a via a gas recirculation ventilator (not shown) to form an air-fuel mixture, thereby forming the primary air flow path 100a. The oxygen concentration of the primary air flowing in from may be adjusted.

In the present embodiment, the state detection unit 40 of the housing 11 transmits the measured or detected data to the control unit 60. The state detection unit 40 of the present embodiment is, for example, a differential pressure measuring means, and is a portion where the primary air flows from the primary air flow path 100a into the mill 10 and the primary air and fine powder fuel from the inside of the mill 10 into the supply flow path 100b. The differential pressure with the outlet 19 discharged from the mill 10 is measured as the differential pressure in the mill 10. For example, depending on the classification performance of the rotary classifier 16, the increase / decrease in the circulation amount of the crushed solid fuel that circulates inside the mill 10 between the vicinity of the rotary classifier 16 and the vicinity of the rotary table 12 and the difference in the mill 10 with respect to this. The increase and decrease of pressure changes. That is, since the pulverized fuel discharged from the outlet 19 can be adjusted and managed with respect to the solid fuel supplied to the inside of the mill 10, the particle size of the pulverized fuel does not affect the combustibility of the burner portion 220. A large amount of pulverized fuel can be supplied to the burner portion 220 provided in the boiler 200.
Further, the state detection unit 40 of the present embodiment is, for example, a temperature measuring means, and is the temperature of the primary air supplied to the inside of the housing 11 for blowing the solid fuel crushed by the roller 13 to the rotary classifier 16. , The temperature of the primary air up to the outlet 19 is detected inside the housing 11, and the blower portion 30 is controlled so as not to exceed the upper limit temperature. Since the primary air is cooled by transporting the pulverized material while drying it in the housing 11, the temperature at the outlet 19 from the upper space of the housing 11 (mill outlet temperature) is, for example, about 60 to 80 degrees. It becomes a degree.

The boiler 200 burns using the fine fuel supplied from the solid fuel crusher 100 to generate steam. Therefore, the boiler 200 includes a fireplace 210 and a burner portion 220.

The burner section 220 heats the primary air containing the pulverized fuel supplied from the supply flow path 100b and the air (outside air) sent out from the forced air ventilator (FDF: Feed Draft Fan) 32 by the heat exchanger 34. It is a device that forms a flame by burning fine fuel using the supplied secondary air. The pulverized fuel is burned in the furnace 210, and the high-temperature combustion gas is discharged to the outside of the boiler 200 after passing through a heat exchanger (not shown) such as an evaporator, a superheater, and an economizer.

The combustion gas discharged from the boiler 200 is subjected to a predetermined treatment by an environmental device (not shown by a denitration device, an electrostatic precipitator, etc.), and is sent from the primary air ventilator 31 by a heat exchanger 34 such as an air preheater, for example. The heat is exchanged between the air and the air sent from the forced air blower 32, and is guided to the chimney (not shown) via the induced blower (IDF) 33 and discharged to the outside air. To. The air sent from the primary air ventilator 31 heated by the combustion gas in the heat exchanger 34 is supplied to the hot gas flow path 30a described above.
The water supply to each heat exchanger of the boiler 200 is heated by an economizer (not shown) and then further heated by an evaporator (not shown) and a superheater (not shown) to generate high-temperature and high-pressure steam to generate electricity. It is sent to a steam turbine (not shown), which is a unit, to rotate drive the steam turbine, and a generator connected to the steam turbine (not shown) is driven to rotate to generate electricity, thereby forming a power plant 1.

FIG. 2 is a diagram showing a detailed configuration example relating to fuel supply to the mill 10. FIG. 2 shows a detection and recovery system of the tag body T. Note that FIG. 2 shows the bunker 21 connected to the mill 10 as solid fuel, for example, in FIG. 2, three bunker 21s are arranged in parallel, and the bunker 21 is arranged in the center of the paper surface among the three units. It is assumed that, for example, coal is accumulated in the bunker 21 and biomass fuel is accumulated on the coal.

The tag body T is mixed with the solid fuel in order to represent the state of the solid fuel supplied to the mill 10 (for example, the type of the solid fuel and the position of switching the type). The tag body T has a transmitter 62 mounted in a case (capsule) 61 as shown in FIG. 3, for example. Further, various sensors (for example, temperature sensor) 63 such as a temperature sensor and a pressure sensor may be mounted in the case 61. The case 61 is made of a material through which electromagnetic waves are transmitted (for example, a coarse mesh through which electromagnetic waves are transmitted or a capsule made of a material having electromagnetic wave transmission (for example, a carbon-based material)). The inside of the case 61 may be filled with a cushioning material or the like in order to protect the contents (transmitter 62, various sensors 63, etc.) from impact. Further, the case 61 may be colored in any color by coloring or the like for the purpose of facilitating the distinction by visual inspection or the like. In FIG. 3, the tag body T is configured such that the transmitter 62 is included in the case 61, but the transmitter 62 and the outer peripheral material (case 61) may be integrally configured, and FIG. It is not limited to the configuration of.

The transmitter 62 is, for example, a non-contact RFID (Radio Frequency Identification) tag (ID tag), and transmits a radio signal to a detection unit 51 described later. Specifically, for example, the transmitter 62 receives the electromagnetic wave from the detection unit 51 with an antenna, obtains the operating power of the tag, and transmits (replies) an information signal to the detection unit 51. Further, the operating power may be directly supplied by incorporating a small battery in the tag body T. For example, the transmitter 62 has the identification information set in advance, and transmits the identification information as a reply. In the present embodiment, the identification information is set for each solid fuel in which the tag body T is mixed. That is, for example, the tag body T mixed in the coal is set with the identification information indicating the coal, and the tag body T mixed in the biomass fuel is set with the identification information indicating the biomass fuel. Information indicating the coal type may be further set in the identification information indicating the coal. Information indicating the type of biomass fuel may be further set in the identification information indicating the biomass fuel. In the tag body T, unique identification information such as the composition information of the solid fuel, the calorific value, the place of origin and the transportation route can be set without the information indicating the type of the solid fuel.

Further, in the present embodiment, the tag body T has, for example, a temperature sensor 63. Therefore, the tag body T transmits the temperature detected by the temperature sensor 63 as temperature information. The tag body T may be equipped with another type of sensor (pressure or the like) to transmit the detected information. In this way, the tag body T transmits a wireless signal including the identification information and the temperature information, and is detected by the detection unit 51 described later.

The tag body T is covered with the case 61 as shown in FIG. 3, but in the present embodiment, the size (size) S of the tag body T is set based on the size of the solid fuel. When the tag body T is spherical as shown in FIG. 3, the size S is the diameter. Specifically, the size S of the tag body T has an upper limit or a lower limit of a size that can be conveyed by a fuel supply system such as a coal feeder 20 or a rotary valve 53, and has a particle size distribution and a size difference of solid fuel. It is set so that it can be separated from solid fuel by sorting according to the mesh or wire mesh opening size. For example, when the mean or median of the particle size distribution of solid fuel is M and the standard deviation is σ, the size S of the tag body T is M + 3σ or more (for example, the particle size of solid fuel is normally distributed). If there is, it is set to be larger than 99.87% of the total solid fuel). The size S of the tag body T is set to a size that can be separated from at least a part of the mixed solid fuel, and the size S of the solid fuel is set to an upper limit or a lower limit of a size that can be conveyed by the fuel supply system. It may be larger or smaller than the mean or median. The tag body T may have a shape other than a spherical shape. When the tag body T has a shape other than a sphere, the size S of the tag body T uses the longest or shortest dimension of the tag body T. If the size S of the tag body T is larger than the average or median size of the solid fuel, compare the shortest dimension with the average or median size of the solid fuel. If it is small, it is preferable to use the longest dimension. In the present embodiment, the case where the size S of the tag body T is set larger than that of the solid fuel will be described.

Then, at least one of the specific gravity and the angle of repose of the tag body T is set based on the flow characteristics of the mixed solid fuel. Specifically, the tag body T is set so that the specific gravity (bulk specific gravity) and the angle of repose are about the same as those of the solid fuel. By setting the specific gravity and the angle of repose to be about the same as the solid fuel (which can be regarded as equal within a predetermined range) in this way, the tag body T exhibits the same behavior as the solid fuel mixed when it is transported. That is, in the solid fuel transporting step, the tag body T is also transported in the same manner as the solid fuel, so that uneven distribution such as local concentration of the tag body T mixed in the solid fuel can be suppressed. Therefore, the tag body T has a specific gravity and an angle of repose set based on the flow characteristics of the mixed solid fuel so as not to separate from the mixed solid fuel. For example, the specific gravity and rest angle of the solid fuel of the tag body T are based on the average value (for example, within ± 5% of the average value) of the distribution characteristics of the specific gravity and the rest angle of the solid fuel, or the median value M and the standard deviation σ (. For example, within M ± standard deviation σ) is set.

The tag body T is mixed with the solid fuel in the transportation path from the fuel supply source to the mill 10. FIG. 4 is a diagram showing a transportation route from the fuel supply source to the mill 10. Coal is transported from the coal mine L1 which is the fuel supply source from the loading port L2 to the receiving port L3 by ship, and is transported to the fuel receiving port L5 of the power plant 1. The biomass fuel is carried from the pellet factory L4, which is the fuel supply source, to the fuel inlet L5 of the power plant 1. Then, the solid fuel is temporarily stored in the coal storage yard L6 and the silo L7, and is transported to the bunker 21 via the common conveyor 54 and the distribution conveyor 55. The tag body T is mixed in the transportation route from the fuel supply source (L1 or L4) in FIG. 4 to the bunker 21 (even after being transported to the fuel supply source (coal mine L1 or pellet factory L4) or the bunker 21). Will be done. The mixing position of the tag body T is not limited. It is preferable that the tag body T is mixed so as to be uniformly distributed with respect to the solid fuel. Further, in the transportation route as shown in FIG. 4, a receiver R capable of acquiring information from the tag body T may be provided at each route position so that the information can be read from the tag body T even during transportation. Further, each receiver (including the detection unit 51 and the reception unit 71) R may be connected to each other by the Internet or the like to aggregate information or the like. Since the receiver R can read the information on the solid fuel in each transport path, it is possible to accurately determine the transport status and prepare for receiving the solid fuel.

As shown in FIG. 2, a detection unit 51 and a collection unit 52 are provided to detect and collect information on the tag body T. That is, a fuel identification system (fuel supply state detection system) is configured by the detection unit 51 and the recovery unit 52. The fuel identification system is a system that detects the supply state of a plurality of types of solid fuel supplied to the mill 10 in the solid fuel crusher 100.

The detection unit 51 detects the identification information preset in the tag body T which is mixed in the solid fuel and can be separated from the solid fuel before the solid fuel is supplied to the mill 10. Specifically, the detection unit 51 is provided on the downstream side (upstream side of the mill 10) of the rotary valve 53 in the fuel supply unit 17 in the solid fuel supply system to the mill 10. Then, the detection unit 51 acquires the identification information from the tag body T passing through with the solid fuel. Specifically, the detection unit 51 emits an electromagnetic wave at a predetermined control cycle, and the tag body T receives the signal transmitted by the electromagnetic wave. In this way, before the solid fuel is supplied to the mill 10, it is possible to grasp the type of the solid fuel from the identification information of the mixed tag body T. The detection unit 51 may detect information (temperature information, pressure information, etc.) of various sensors in addition to the identification information.

For example, when the detection unit 51 detects the identification information indicating coal, it can be recognized in advance that coal is supplied to the mill 10 as solid fuel at the position of the detection unit 51 in the fuel supply system. .. Further, when the detection unit 51 detects the identification information indicating the biomass fuel from the state in which the identification information indicating the coal is detected, the biomass fuel is used as the solid fuel at the position of the detection unit 51 in the fuel supply system. It has passed, and it can be accurately recognized that the biomass fuel will be supplied to the mill 10 after a predetermined time, and the mill 10 is changed to the operating conditions for the biomass fuel, and the specifications of the crushed fine powder fuel are changed. Can be secured.

Further, since the detection unit 51 acquires the identification information from the plurality of mixed tag bodies T, the intensity of the detected information (the count number of the tag body T has a correlation with the density of the tag body T). The information can also be used to understand the mixed state of each solid fuel. That is, the fuel supply state (mixed state) can be grasped according to the detected amount (ratio) of the identification information of each solid fuel. The detection amount of the identification information is the number (detection number) of the tag bodies T passing (detected) per unit time in the detection unit 51. In this way, the detection unit 51 detects the tag body T to perform a detection pattern (for example, when the type of solid fuel supplied to the mill 10 is completely switched from coal to biomass fuel, or when coal is temporarily used. When biomass fuel is mixed with, etc.) can be obtained. Further, by obtaining the detection pattern in advance, it is possible to grasp the supply state of the solid fuel to the mill 10 in advance by detecting the tag body T, and the mill 10 is changed to the operating condition for the solid fuel. Therefore, the specifications of the crushed pulverized fuel can be secured.

Regarding the installation position of the detection unit 51, if information can be detected from the tag body T mixed in the solid fuel supplied to the mill 10, for example, on the upstream side of the rotary valve 53, the rotary as shown in FIG. It is not limited to the downstream side of the valve 53.

The recovery unit 52 recovers the tag body T from the solid fuel. Specifically, the recovery unit 52 is provided in the solid fuel supply path (fuel supply system) to the mill 10. FIG. 2 shows an example in which the recovery unit 52 is provided on the downstream side of the detection unit 51 in the fuel supply unit 17.

The recovery unit 52 recovers the tag body T from the solid fuel according to the size S of the tag body T. For this purpose, the collecting unit 52 is composed of a member capable of selectively passing an object according to its size (for example, a mesh member such as a mesh, a wire mesh, a punching metal, or the like that separates objects by opening (passing size)). There is. That is, in the recovery unit 52, the tag body T is not passed through, but the solid fuel is passed through and flows to the downstream side of the fuel supply system. Therefore, the size of the mesh of the mesh member is set to be smaller than the size S of the tag body T and larger than the standard size of the solid fuel. The tag body T that could not pass through the recovery unit 52 is separated from the solid fuel and removed from the fuel supply system, and the tag body T is suppressed from entering the mill 10. At this time, the solid fuel larger than the standard size is separated together with the tag body T, but since the quantity of the solid fuel larger than the standard size is small, it can be easily separated by another method such as a shape recognition sensor. In this way, the solid fuel and the tag body T are separated and recovered.

The recovered tag body T may be reused thereafter. When reusing, it is preferable to confirm whether the operating state of the tag body T and the state of the case 61 are normal, and remove the abnormal tag body T.

In the above description, the case where the tag body T is separated from the solid fuel and recovered according to the size S of the tag body T has been described, but the recovery method is not limited to the above-mentioned method. For example, the tag body T may contain a magnetic material or a paramagnetic material. That is, in the tag body T, a magnetic material or a paramagnetic material (magnet, iron piece, etc.) is provided on a part of the surface or inside of the case 61, and the recovery unit 52 uses the magnetic force to remove the tag body T from the solid fuel. It may be separated and collected. Specifically, a magnetic material (magnet) is also provided in the recovery unit 52, and the tag body T mixed in the solid fuel is attracted by a magnetic force to be separated from the solid fuel. Further, the tag body T in the solid fuel may be identified and sorted by color, shape, etc. by image recognition, or the position of the tag body T may be determined from the difference in electromagnetic waves emitted from the tag body T by providing a plurality of receivers R. It may be estimated and sorted.
As described above, various methods can be applied to the sorting method, and a plurality of methods may be combined and installed.

The control unit 60 is a device that controls each part of the solid fuel crushing device 100. The control unit 60 may control the rotation speed of the rotary table 12 with respect to the operation of the mill 10 by transmitting a drive instruction to the drive unit 14, for example. The control unit 60 adjusts the classification performance by transmitting a drive instruction to the motor 18 of the rotary classifier 16 to control the rotation speed, thereby optimizing the differential pressure in the mill 10 within a predetermined range. It is possible to stabilize the supply of pulverized fuel. Further, the control unit 60 adjusts the supply amount of the solid fuel that the transport unit 22 conveys the solid fuel and supplies it to the fuel supply unit 17 by transmitting a drive instruction to the motor 23 of the coal feeder 20, for example. Can be done. Further, the control unit 60 can control the opening degree of the hot gas damper 30c and the cold gas damper 30d to control the flow rate and temperature of the primary air by transmitting the opening degree instruction to the blower unit 30. Further, the control unit 60 transmits the crushing load instruction to the pressing device 49, so that the roller 13 is pressed against the rotary table 12 according to, for example, the supply amount of solid fuel and the rotation speed of the rotary classifier 16. It optimizes the force (crushing load) and enables stable crushing of solid fuel.

The control unit 60 in the present embodiment controls the operating state of the mill 10 based on the identification information of the tag body T detected by the detection unit 51. That is, the control unit 60 uses the identification information of the tag body T mixed in the solid fuel supplied to the mill 10 detected by the detection unit 51 before the solid fuel is supplied to the mill 10 to the mill 10. The mill 10 is controlled by accurately grasping the type of solid fuel to be supplied in advance. Therefore, in the mill 10, it is possible to perform control by changing the set value of the operating conditions of the mill 10 without delay according to the time when the properties of the solid fuel are changed (preceding control). For example, from the monitoring information of the mill 10 during operation (mill outlet temperature, differential pressure in the mill, rotary table drive current, etc.), the operator or the like determines that the fuel has been switched due to the change in the operating state of the mill 10. When changing the set value of the mill operating conditions, the control delay of the mill 10 occurred, but since the state (coal type) of the solid fuel before supply can be detected, the fuel type is actually switched. It is possible to automatically grasp the time point and more reliably optimize the mill operation conditions without delay. That is, the control unit 60 automatically determines the type of fuel supplied to the mill 10 and the mixed state of the plurality of types of fuel based on the detection pattern of the identification information detected from the tag body T, and determines the mixed state of each fuel. Control is performed so that the operating state of the mill 10 suitable for the properties is set. In the present embodiment, a case where different identification information is set for each type of solid fuel in the tag body T will be described. However, since it is sufficient if the type of solid fuel to be supplied can be grasped, for example, coal and biomass. The tag body T having different information for both fuels may be mixed, or the tag body T may be mixed only with coal or only biomass fuel (only specific solid fuel).

FIG. 5 is a diagram showing an example of the hardware configuration of the control unit 60 according to the present embodiment.
As shown in FIG. 5, the control unit 60 is a computer system (computer system), for example, a CPU 110, a ROM (Read Only Memory) 120 for storing a program or the like executed by the CPU 110, and when each program is executed. It is provided with a RAM (Random Access Memory) 130 that functions as a work area of the above, a hard disk drive (HDD) 140 as a large-capacity storage device, and a communication unit 150 for connecting to a network or the like. Each of these parts is connected via a bus 180.

Further, the control unit 60 may include an input unit including a keyboard, a mouse, and the like, a display unit including a liquid crystal display device for displaying data, and the like.

The storage medium for storing the program or the like executed by the CPU 110 is not limited to the ROM 120. For example, it may be another auxiliary storage device such as a magnetic disk, a magneto-optical disk, or a semiconductor memory.

A series of processing processes for realizing various functions described later is recorded in the HDD 140 or the like in the form of a program, and the CPU 110 reads this program into the RAM 130 or the like and executes information processing / calculation processing. , Various functions described later are realized. The program is installed in ROM 120 or other storage medium in advance, is provided in a state of being stored in a computer-readable storage medium, or is distributed via a wired or wireless communication means. Etc. may be applied. Computer-readable storage media include magnetic disks, magneto-optical disks, CD-ROMs, DVD-ROMs, semiconductor memories, and the like. Further, the HDD 140 may be replaced with a solid state disk (SSD) or the like.

Specifically, the control unit 60 determines the identification information such as the type of solid fuel based on the identification information of the tag body T to be detected, and determines the rotation speed of the rotary classifier 16 (classifier rotation speed). At least one of the air volume of the transported gas of the crushed solid fuel (primary air air volume), the temperature of the transported gas on the outlet side of the mill 10 (mill outlet temperature), and the crushing load of the mill 10 for crushing the solid fuel. On the other hand, the operating state of the mill 10 is controlled so as to satisfy the operation control target value. The operation control target value is a control target value of each control target, and is set in advance for each property of the solid fuel. For example, since coal and biomass fuel have different crushing characteristics, it is necessary to control the solid fuel crushing device 100 corresponding to each fuel. Specifically, since biomass fuel has low crushability (difficult to crush) as compared with coal, the particle size may be about 5 to 10 times larger than that of coal. On the other hand, biomass fuel has better flammability than coal, and even crushed fuel having a larger particle size than coal can be burned at 220 in the burner section. Therefore, by discharging the biomass fuel from the mill 10 in coarse particles as compared with coal, it is possible to prevent an overload due to the retention of the crushed fuel in the mill 10. In addition, since biomass fuel has the property of being easily ignited, it is necessary to appropriately manage the temperature state during storage in the bunker 21 and during crushing in the mill 10 before putting it into the boiler 200 as compared with coal. .. Since the characteristics differ depending on the type of solid fuel, the classifier rotation speed of the mill 10, the primary air air volume, the mill outlet temperature, and the crushing load are controlled according to the properties of the solid fuel supplied. It is possible to appropriately set the operating state of the mill 10. The control target may select operating parameters (operating state) other than the classifier rotation speed, the primary air air volume, the mill outlet temperature, and the crushing load, if necessary, based on the properties of the solid fuel.

In the present embodiment, the control unit 60 describes the case where the classifier rotation speed, the primary air air volume, the mill outlet temperature, and the crushing load are controlled by the operation control target values, but the classifier rotation speed and the primary air air volume , Mill outlet temperature, and at least one of the crushing load may be controlled, and operating parameters other than the classifier rotation speed, primary air volume, mill outlet temperature, and crushing load (operating state). ) May be the control target.

FIG. 6 shows an example in which each control target is controlled according to the detection pattern of the identification information from the tag body T. FIG. 6 shows a case where coal and biomass fuel are used as solid fuel, and section A shows a change in the operation control target value of each control target when, for example, coal is temporarily mixed with biomass fuel. , Section B shows the change in the operation control target value of each controlled object when, for example, the coal is completely switched to the biomass fuel. That is, as shown in FIG. 6, in the section A, the detection amount of the tag body T having the identification information corresponding to coal temporarily decreases, and the detection amount of the tag body T having the identification information corresponding to the biomass fuel temporarily decreases. By increasing the amount of coal, it is detected that the biomass fuel is temporarily mixed with the coal. Then, in the section B, the detected amount of the tag body T having the identification information corresponding to coal decreases (from a predetermined value) to 0, and the detected amount of the tag body T having the identification information corresponding to the biomass fuel is ( A complete switch from coal to biomass fuel is detected by an increase (above a predetermined value). In the section A, it is determined that the solid fuel is not completely switched as in the section B but is a temporary mixture based on the detected amount of the tag body T having the identification information corresponding to the coal and biomass fuel. Can be done. When the tag body T is mixed in only one of the coal and the biomass fuel, it is determined that the coal or the biomass fuel is temporarily mixed by temporarily increasing or decreasing the detected amount of the tag body T. can do. Further, by increasing or decreasing the detected amount of the tag body T (more than a predetermined value), it can be determined that the solid fuel has been completely switched.

When it is detected that the biomass fuel is temporarily mixed with the coal as in the section A of FIG. 6, the number of revolutions of the classifier is temporarily reduced. That is, since the classification performance of the rotary classifier 16 is lowered by lowering the number of revolutions of the classifier, biomass fuel having a lower grindability than coal can be discharged from the mill 10 in a state of having a large particle size. , The retention of crushed biomass fuel in the mill 10 is suppressed. For example, if the number of revolutions of the classifier is in the range of 90 rpm or more and 180 rpm or less during coal crushing, it is reduced to the range of 10 rpm or more and 150 rpm or less (by a predetermined value) when biomass fuel is also mixed and crushed. .. In this way, when other solid fuels having lower grindability than the solid fuel supplied to the mill 10 are mixed, the solid fuel stays in the mill 10 by lowering the number of rotations of the classifier. The occurrence of overload of the mill 10 is suppressed.

When it is detected that the biomass fuel is temporarily mixed with the coal as in the section A of FIG. 6, the mill outlet temperature is temporarily lowered. That is, the ignition of the biomass fuel in the mill is suppressed by lowering the temperature at the outlet of the mill. For example, assuming that the mill outlet temperature is about 80 ° C. at the time of coal crushing, the temperature is lowered to about 60 ° C. (by a predetermined value) when the biomass fuel is also mixed and crushed. In this way, when other solid fuels that are easier to ignite than the solid fuel supplied to the mill 10 are mixed, the ignition of the solid fuel in the mill 10 is suppressed by lowering the mill outlet temperature. ..

When it is detected that the biomass fuel is temporarily mixed with the coal as in the section A of FIG. 6, the crushing load is temporarily increased. That is, by increasing the crushing load, the biomass fuel having a lower crushability than coal can be effectively crushed to reduce the particle size, and the fuel is easily discharged from the mill 10. Therefore, in the mill 10. Suppresses the retention of solid fuel. For example, assuming that the crushing load is about 5 MPa at the time of coal crushing, the crushing load is increased to about 6 to 7 MPa (by a predetermined value) when the biomass fuel is also mixed and crushed. In this way, when other solid fuels having lower grindability than the solid fuel supplied to the mill 10 are mixed, the mill 10 is caused by the retention of the solid fuel in the mill 10 by increasing the crushing load. The occurrence of overload is suppressed.

In FIG. 6A, the case where the primary air air volume is not changed is illustrated, but the primary air air volume is temporarily increased to produce a biomass fuel having a lower grindability than coal. It may be made easy to be discharged in a large state. However, when a plurality of types of solid fuels are temporarily mixed, it is preferable to maintain the current value of the primary air air volume and adjust the classifier rotation speed of the rotary classifier 16. This is because if the two parameters of the classifier rotation speed and the primary air air volume are controlled at the same time, the control may diverge and not converge.

When completely switching from coal to biomass fuel as in section B of FIG. 6, the number of revolutions of the classifier is reduced. That is, since the classification performance of the rotary classifier 16 is lowered by lowering the number of revolutions of the classifier, biomass fuel having a lower grindability than coal can be discharged from the mill 10 in a state of having a large particle size. , The retention of solid fuel in the mill 10 is suppressed. For example, assuming that the number of revolutions of the classifier is in the range of 90 rpm or more and 180 rpm or less during coal crushing, the speed is reduced to 10 rpm or more and 30 rpm or less (by a predetermined value) during biomass fuel crushing. In this way, when switching from the solid fuel supplied to the mill 10 to another solid fuel having a lower grindability, the mill is due to the retention of the solid fuel in the mill 10 by lowering the number of rotations of the classifier. The occurrence of overload of 10 is suppressed.

When completely switching from coal to biomass fuel as in section B of FIG. 6, the primary air volume is increased. That is, by increasing the primary air volume, the biomass fuel having a lower grindability than coal is effectively discharged in a state of a large particle size, and the retention of the biomass fuel in the mill 10 is suppressed. .. For example, assuming that the primary air air volume is about 25 t / h when crushing coal, it is increased to about 28 to 30 t / h (by a predetermined value) when crushing biomass fuel. In this way, when switching from the solid fuel supplied to the mill 10 to the solid fuel having lower grindability, the mill 10 is overloaded due to the retention of the solid fuel in the mill 10 by increasing the primary air air volume. The load generation is suppressed.

When completely switching from coal to biomass fuel as in section B of FIG. 6, the mill outlet temperature is lowered. That is, by lowering the mill outlet temperature, the ignition of the biomass fuel in the mill 10 is suppressed. For example, if the mill outlet temperature is about 80 ° C. when coal is crushed, it is lowered to about 60 ° C. (by a predetermined value) when biomass fuel is crushed. In this way, when switching from the solid fuel supplied to the mill 10 to another solid fuel that is more easily ignited, the ignition of the solid fuel in the mill 10 is suppressed by lowering the mill outlet temperature.

When completely switching from coal to biomass fuel as in section B of FIG. 6, the crushing load is increased. That is, by increasing the crushing load, the biomass fuel having a lower crushability than coal can be effectively crushed to reduce the particle size, and the fuel is easily discharged from the mill 10. Therefore, in the mill 10. It suppresses the retention of biomass fuel in Japan. For example, if the crushing load is about 5 MPa when crushing coal, it is increased to about 6 to 7 MPa (by a predetermined value) when crushing biomass fuel. In this way, when switching from the solid fuel supplied to the mill 10 to a solid fuel having a lower grindability, the mill 10 is overloaded due to the retention of the solid fuel in the mill 10 by increasing the grinding load. The outbreak is suppressed.

In this way, by appropriately switching the operation control target value according to the characteristics of the supplied solid fuel, the solid fuel can be switched without stopping the operation of the mill 10.

In the example of FIG. 6, the classifier rotation speed was controlled by changing the operation control target value between the case of the section A and the case of the section B. Specifically, the number of revolutions of the classifier is controlled according to the change in the detection amount of the tag body T detected by the detection unit 51 (the detection amount of the tag body T having the identification information corresponding to the biomass fuel). .. In this way, by controlling the operating state of the mill 10 according to the change in the detected amount of the identification information, it is possible to more effectively perform appropriate control according to each solid fuel supplied to the mill 10. Is. Other control targets (primary air air volume, mill outlet temperature, and crushing load) may also be controlled according to changes in the detected amount of identification information.

Next, an example of control by the control unit 60 described above will be described with reference to FIG. 7. FIG. 7 is a flowchart showing an example of the control procedure of the solid fuel crusher 100 according to the present embodiment. The flow shown in FIG. 7 is repeatedly executed in a predetermined control cycle, for example, when the solid fuel crusher 100 is in operation.

First, the detection unit 51 detects the identification information from the tag body T mixed in the solid fuel (S101). Since identification information is set in the tag body T according to the type of solid fuel mixed in, in the present embodiment, the type of solid fuel can be identified by detecting the identification information. The tag body T is recovered by the recovery unit 52 after the identification information is detected by the detection unit 51, is separated from the solid fuel, and the tag body T is suppressed from entering the mill 10. The identification information may be detected from the collected tag body T.

Based on the detected identification information, the operation control target value of the classifier rotation speed is set (S102). An appropriate operation control target value of the classifier rotation speed is set according to the identification information (solid fuel). Here, the solid fuel used in the solid fuel crusher 100 can be stably switched.

Based on the detected identification information, the operation control target value of the primary air air volume is set (S103). An appropriate primary air air volume operation control target value is set according to the identification information (solid fuel). Here, the solid fuel used in the solid fuel crusher 100 can be stably switched.

Based on the detected identification information, the operation control target value of the mill outlet temperature is set (S104). An operation control target value of an appropriate mill outlet temperature is set according to the identification information (solid fuel). Here, the solid fuel used in the solid fuel crusher 100 can be stably switched.

Based on the detected identification information, the operation control target value of the crushing load is set (S105). An appropriate crushing load operation control target value is set according to the identification information (solid fuel). Here, the solid fuel used in the solid fuel crushing device 100 can be stably switched.

Since the switching of fuel types having greatly different properties can be accurately carried out without temporarily stopping the mill 10, the operating rate of the mill 10 is improved. Further, the mill 10 can be changed to the operation condition for the switched solid fuel, and the specifications of the crushed pulverized fuel can be secured.

As described above, according to the fuel identification system, the control system, the solid fuel crushing device, and the fuel identification method according to the present embodiment, identification is performed from the tag body T mixed before the solid fuel is supplied to the mill 10. In order to detect the information, it is possible to obtain information on the solid fuel supplied to the mill 10 in advance. Since the tag body T can be separated from the solid fuel, the recovery unit 52 can recover the tag body T from the solid fuel. The collected tag body T can also be reused. Since the identification information can be obtained from the tag body T in advance (before being supplied to the mill 10), for example, the mill 10 can be controlled in advance with respect to the supplied solid fuel.

Since the specific gravity and / or the angle of repose of the tag body T is set based on the flow characteristics of the mixed solid fuel, the tag body T can be moved in the same manner as the solid fuel. That is, it is possible to suppress uneven distribution such as local concentration of the tag body T mixed in the solid fuel.

By setting the size S of the tag body T based on the size of the solid fuel, the tag body T can be efficiently recovered from the solid fuel. For example, the tag body T can be easily solidified by opening a mesh or wire mesh by making it large (slightly large) by a predetermined ratio or small (slightly small) by a predetermined ratio with respect to the size of the solid fuel. Can be separated from fuel. Further, since the tag body T contains a magnetic material or a paramagnetic material, it is possible to efficiently recover the tag body T from the solid fuel by utilizing the magnetic force. For example, by attracting the tag body T using a magnet, it can be easily separated from the solid fuel. Further, by identifying the tag body T from the fuel by image recognition or specifying the position of the electromagnetic wave transmission source by a plurality of receivers, it can be easily separated from the solid fuel.

Further, by providing the recovery unit 52 in the solid fuel supply path to the mill 10, the tag body T can be recovered before being supplied to the mill 10. Therefore, the tag body T can be reused.

[Second Embodiment]
Next, the fuel identification system, the control system, the solid fuel crusher, and the fuel identification method according to the second embodiment of the present disclosure will be described.
In the above-described first embodiment, the identification information of the tag body T is set according to the mixed solid fuel, but in the present embodiment, the case where the boundary information is set in the identification information will be described. Hereinafter, the fuel identification system, the control system, the solid fuel crusher, and the fuel identification method according to the present embodiment will be mainly described with respect to the differences from the first embodiment.

As shown in FIG. 8, when coal and biomass fuel are distributed to each bunker 21 by using the distribution conveyor 55, the solid fuel carried by the distribution conveyor 55 is distributed to each bunker 21 by the distribution gate 56. However, if the solid fuel leaks at the distribution gate 56 (for example, a part of another solid fuel is mixed while switching to another bunker 21 at the distribution gate 56), the solid fuel goes to the bunker 21 which is not the transportation destination. There is a risk that some parts will flow in and be transported. FIG. 8 shows a state in which coal is accumulated in the bunker B1 and biomass fuel is transported to the bunker B2 by the distribution gate 56. However, the biomass fuel leaked at the distribution gate 56 may be transported to the bunker B1 where coal is accumulated, and some biomass fuel may be deposited on the coal. Further, not limited to the leak of solid fuel at the distribution gate 56, the solid fuel adhering to the distribution conveyor 55 after distribution to each bunker 21 is thinly deposited on the bunker 21 in which different solid fuels are accumulated, and is deposited in the bunker 21. There may be different layers of solid fuel. In such a case, since a plurality of types of solid fuel are supplied to the mill 10 in a mixed state, the mill 10 cannot be changed to the operating conditions for the switched solid fuel, and only the crushing performance of the mill 10 is obtained. However, the specifications of the crushed pulverized fuel could not be secured, and the combustion performance of the burner portion 220 on the wake side of the mill 10, the amount of steam generated in the boiler 200, and the temperature distribution state of each heat exchanger fluctuated. It may become unstable and it may be difficult (disturbance) to continue stable operation of the power plant 1.

Therefore, in the present embodiment, the identification information indicating the switching point is set in the tag body (boundary tag body) Ta mixed at the position where the type of solid fuel is switched. That is, boundary information is set in the identification information corresponding to the boundary tag body Ta mixed at the boundary position where the type of solid fuel to be supplied is switched, and based on the boundary information, the solid fuel after switching is used. The mill 10 is controlled according to the type. In this case, for example, as shown in FIG. 8, the boundary tag body Ta (boundary information is included in the identification information) in which boundary information is set for the coal accumulated in the bunker B1 after the transportation of coal into the bunker B1 is completed. The set tag body T) is mixed (sprayed on the coal accumulated in the bunker B1). Therefore, even if biomass fuel, which is a different solid fuel, is transported to the bunker B1 (on the coal) after the boundary tag body Ta is mixed and is deposited or accumulated, the boundary is at the boundary between the coal and the biomass fuel. The tag body Ta will be mixed. Therefore, it is possible to detect that the type of solid fuel is switched by detecting the identification information indicating the boundary information of the boundary tag body Ta. If the storage order of the solid fuels stored in the bunker 21 is known, the switching of the solid fuels can be detected by the boundary information.

When the boundary tag body Ta with the boundary information set is used, as shown in FIG. 2, the tag body in which the identification information corresponding to the solid fuel is set for the other solid fuel to be mixed. The boundary position can be detected without uniformly mixing T. That is, when the boundary tag body Ta is used, the tag body T may or may not be mixed in the other solid fuel to be mixed.

Since the position where the type of solid fuel changes can be detected before the fuel is supplied, the solid fuel crusher 100 can be controlled in advance according to the changed solid fuel, and the operation of the power generation plant 1 can be performed. It is possible to stabilize the state.

In addition, when different kinds of solid fuels are accumulated in the bunker 21 as in the first embodiment, even if the tag body T is uniformly mixed in each solid fuel, the boundary tag is set at the boundary position. Body Ta may be mixed. By mixing the boundary tag body Ta, it is possible to recognize the switching in advance before the solid fuel is actually switched, and it is possible to take a quicker response.

When the boundary tag body Ta is used, the detection pattern of the identification information from the boundary tag body Ta is as shown in FIG. The difference from FIG. 6 in the detection pattern of the identification information from the tag body according to the present embodiment will be mainly described. As shown in FIG. 9, since the boundary tag body Ta can be detected by the detection unit 51 before the biomass fuel is detected, the switch from coal to the biomass fuel can be recognized in advance. Therefore, it is possible to more appropriately control the operation control target values of each control target (classifier rotation speed, primary air air volume, mill outlet temperature, and crushing load) according to each solid fuel.

As described above, according to the fuel identification system, the control system, the solid fuel crushing device, and the fuel identification method according to the present embodiment, it corresponds to the boundary tag body Ta mixed at the boundary position where the type of solid fuel is switched. Since the boundary information is set, it is possible to grasp the boundary position and control the mill 10 to the operating conditions for the switched solid fuel. That is, it is possible to control the mill 10 without delay according to the type of solid fuel after switching. Therefore, it is possible to switch the solid fuel without stopping the mill 10. That is, it can contribute to the safe and stable operation of the power plant 1.

[Third Embodiment]
Next, the fuel identification system, the control system, the solid fuel crusher, and the fuel identification method according to the third embodiment of the present disclosure will be described.
In the present embodiment, a case where the state of the solid fuel accumulated in the stage before being supplied to the mill 10 is monitored will be described. Hereinafter, the fuel identification system, the control system, the solid fuel crusher, and the fuel identification method according to the present embodiment will be mainly described with respect to the differences from the first embodiment and the second embodiment.

The solid fuel is stored in the bunker 21 before being supplied to the mill 10, but the solid fuel in the stored state may have an abnormal temperature rise. This is because the natural oxidation temperature rise of the solid fuel gently proceeds in an atmosphere where oxygen is present, but heat dissipation to the surroundings is suppressed when the solid fuel is closely stored inside the bunker 21, so that the solid fuel is a solid fuel. It is generated when the heat generated by the natural oxidation temperature rise exceeds the heat dissipation. Therefore, in the present embodiment, the abnormal temperature rise that occurs in the accumulated state is efficiently suppressed. In this embodiment, the case where the solid fuel is stored in the bunker 21 will be described as an example, but if it is a storage unit (storage facility) in which the solid fuel is stored, for example, a bunker such as a coal storage yard or a silo. Not limited to 21.

FIG. 10 is a diagram showing a detailed configuration example of the bunker 21 in the present embodiment. As shown in FIG. 10, the solid fuel carried by the distribution conveyor 55 is stored in the bunker 21. The tag body T is mixed in the accumulated solid fuel. The bunker 21 is provided with a receiving unit 71 and a watering unit 72.

The receiving unit 71 receives a radio signal from the tag body T mixed in the stored solid fuel. That is, the receiving unit 71 receives the signal from the tag body T in the same manner as the detecting unit 51. A plurality of receiving units 71 are provided in the storage direction in the bunker 21 in which the solid fuel is stored. Specifically, as shown in FIG. 10, a plurality of receiving units 71 are provided at predetermined intervals in the direction in which the solid fuel is accumulated (accumulation direction, in the vertical direction on the paper surface in FIG. 10). The accumulation direction is parallel to the depth direction of the bunker 21. Further, a plurality of receiving units 71 are provided at a fixed position in the accumulation direction (depth direction). That is, at a position where the accumulation direction is constant (in the plane perpendicular to the accumulation direction), a plurality of receiving units 71 are provided on the outer peripheral portion of the bunker 21 (in the case of the cylindrical bunker 21, the radial direction and the circumferential direction). In other words, a plurality of layers perpendicular to the storage direction are provided, and each layer is provided with a plurality of receiving units 71 arranged at predetermined positions on the outer peripheral position of the bunker 21. By arranging the receiving unit 71 in this way, it is possible to reliably acquire information about the solid fuel near the receiving unit 71 arranged at a more predetermined position from the tag body T mixed in the accumulated solid fuel. It becomes.

Then, the control unit 60 estimates the position of the tag body T in the bunker 21 based on the information (radio signal) received by the reception units 71 arranged at a plurality of predetermined positions. Specifically, since the tag body T is provided with the temperature sensor 63, the receiving unit 71 also receives the temperature information. Therefore, the control unit 60 determines whether or not a temperature abnormality has occurred based on the received temperature information. The temperature abnormality is a case where the measured temperature is equal to or higher than the threshold value. The threshold value is set as a lower limit of the temperature at which abnormal heat generation is estimated to occur depending on the solid fuel. The tag body T may determine the temperature abnormality and transmit the temperature abnormality information to the receiving unit 71.

Then, the control unit 60 estimates the position of the tag body T based on the received signals in the plurality of receiving units 71 received from the tag body T presumed to have a temperature abnormality. For example, FIG. 11 is a cross-sectional view of the bunker 21 and shows a case where a temperature abnormality is detected in the tag body T (P1). Then, since signals can be received from the tag body T (P1) by the plurality of receiving units 71, the position of the tag body T (P1) is estimated and specified from the difference in the radio wave strength and the difference in the radio wave phase at the reception time. can do. That is, in the accumulated solid fuel, it is possible to estimate and identify the position of the solid fuel in which the temperature abnormality has occurred. The specific method for specifying the position is not limited to the method based on the difference in radio wave intensity and the difference in radio wave phase at the reception time.

When the control unit 60 detects a temperature abnormality based on the received radio signal, the control unit 60 sprays water (a predetermined medium for suppressing the temperature rise) to the storage position of the corresponding tag body T. That is, when the control unit 60 estimates and identifies the temperature abnormality position, the control unit 60 controls the watering unit 72 to spray water to the position corresponding to the temperature abnormality position. FIG. 12 is a vertical cross-sectional view of the bunker 21. For example, when a temperature abnormality is detected in the tag body T (P1), it is presumed that an abnormal temperature rise occurs in the solid fuel around the tag body T (P1). Water is sprayed on the accumulation position of P1). Specifically, a plurality of spraying portions are provided on the upper part of the bunker 21, and water is sprayed by controlling the sprinkling portion 72 located on the upstream side in the accumulation direction with respect to the tag body T (P1) having an abnormal temperature. To. When the solid fuel around the tag body T (P1) no longer causes an abnormal temperature rise, the spraying of water to the accumulation position of the tag body T (P1) is completed.

For example, when a temperature abnormality is detected, if the position cannot be specified, it is necessary to spray water over the entire bunker 21, but the water content in the solid fuel increases and the dryness in the mill 10 deteriorates, or the solid fuel becomes Increased cohesiveness due to the inclusion of water may cause clogging and other secondary adverse effects due to spraying water over the entire surface. It is also expected that the amount of water used will increase. However, in the present embodiment, when an abnormal temperature rise inside the stored fuel such as the bunker 21 is detected, the required amount of water is sprinkled only on that portion. Therefore, the amount of water can be suppressed, and deterioration of dryness and clogging of the mill 10 can be suppressed. In addition, it is possible to confirm that the temperature rise is stopped and the temperature is lowered due to watering, and the effect of watering can be visualized.

The installation position of the receiving unit 71 and the installation position of the watering unit 72 are not limited to the configuration shown in FIG. Further, not only the detection of the temperature abnormality of the accumulated solid fuel but also the temperature distribution state of the accumulated solid fuel may be specified. That is, the temperature information may be received from each tag body T, the position of each tag body T may be specified, and the temperature distribution state may be simulated and visualized. Further, as a medium for suppressing the temperature rise, a liquid other than water, a powdery solid such as calcium carbonate (powder extinguishing agent), or a gas containing no oxygen such as nitrogen or carbon dioxide may be used.

As described above, according to the fuel identification system, the control system, the solid fuel crushing device, and the fuel identification method according to the present embodiment, the receiving unit 71 arranged at a predetermined position is mixed and accumulated in the solid fuel. Since the radio signal is received from the tag body T, the position of the accumulated tag body T can be estimated. By providing a plurality of receiving units 71 in the storage direction with respect to the bunker 21 in which the solid fuel is stored, the storage position of the tag body T can be estimated more accurately. Since the tag body T has the temperature sensor 63, it is possible to detect a temperature abnormality by a wireless signal. Therefore, since it can be assumed that the solid fuel accumulated at the estimated storage position is in a state of abnormal temperature, it is possible to suppress the state of abnormal temperature by spraying water at the storage position. .. In addition, since the storage position can be estimated, it is not necessary to spray water on the entire stored solid fuel, and it is possible to efficiently spray water and effectively suppress temperature abnormalities. .. In addition, the effect of eliminating the temperature abnormality caused by watering can be confirmed.

The present disclosure is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the invention. It is also possible to combine each embodiment. That is, the above-mentioned first embodiment, second embodiment, and third embodiment can be combined with each other.

For example, the tag body T to be put into the solid fuel has a size that can be transported together with the solid fuel by the transport system, has a strength that does not break even if it is mixed with the solid fuel and transported, is inexpensive, harmless, and can be transported by the mill 10. Even if it is crushed, it is desirable that it does not have a harmful effect on the mill 10 and the power generation plant 1, such as being discharged from the spirage hopper. Further, information other than the identification information (fuel lot number, time, etc.) may be recorded in the tag body T. The identification information and the like of the tag body T may be rewritten from the outside according to the purpose of use.

Further, any number of receivers R may be installed on the fuel transportation route from the fuel supply source (mining station L1, pellet factory L4, etc.) to the mill 10, and the tag body T in the transportation route from the receiver R may be installed. By reading the information from, it becomes possible to streamline the preparation for receiving solid fuel. It is preferable that the receiver R manages the installation position and can more reliably detect the transmission information from the tag body T for the fuel passing through the transportation route. For example, an antenna may be added to improve the reception range and reception performance. Further, the receiver R (detection unit 51 or the like) may be multiplexed to form a 2 out of 3 configuration (a configuration in which a plurality of detection units 51 make a determination (detection) by a majority vote) or the like. The receiver R (including the detection unit 51 and the reception unit 71) may be permanently installed or temporarily installed, may be detachable for maintenance, or may be mounted on a movable body such as a drone. , You may perform detection at any place.

Further, the passing signal of the tag body T detected by the detection unit 51 is transmitted to the processing device and used for changing the operating conditions, but the operator may be finally notified of the passing of the tag body T.

Further, the tag body T may be uniformly mixed in the fuel, but the input amount may be reduced according to the purpose. For example, when the purpose is to detect the change of fuel type, the input amount of the tag body T can be further saved by intensively charging at the boundary where the fuel changes, and when the purpose is to detect the temperature inside the silo or the bunker 21. , It is preferable to mix evenly.

Further, the insertion place of the tag body T is not limited to the space between the coal storage yard L6 and the coal feeder 20 and the mill 10, but may be further upstream. Depending on the purpose of detection, it may be any of the fuel transportation routes from the fuel supply source (mining plant, pellet molding factory, etc.) to the mill 10. For example, in a coal storage yard, each fuel type may be partially mixed at the time of delivery. When detecting a change in fuel type in such a case, it is preferable that the tag body T having different identification information for each fuel type has already been inserted at the time of the fuel inlet of the power plant 1. According to this, by arranging the receiver R on the fuel transportation route, it is possible to grasp how far the fuel type is transported. At the coal storage yard, the tag body T is mixed in each fuel type at the time of delivery, so that each fuel type can be judged and grasped without misidentification, and the preparation for receiving solid fuel can be made more efficient. Moreover, even if a part of the mixture is mixed, the mixed situation can be grasped.

Further, the information received from the tag body T may be aggregated on the IoT network (on the network) and used for the analysis of the operating state. For example, by collecting fuel properties and identification information on a predetermined server using the Internet at a fuel manufacturing plant (mining plant, pellet molding plant, etc.), the plant can be received after receiving new fuel while the plant is in operation. By accessing a predetermined server from the identification information detected by the machine R, the fuel properties may be easily grasped, the fuel type switching time may be accurately estimated, and the fuel type may be used for the operation plan of the plant. Further, the information from the sensor provided on the tag body T in the local plant may be collected in a predetermined server on the IoT such as the Internet, and the operating state of each fuel type of the plant may be grasped from the information. In addition, by accumulating the aggregated information in a database (not shown) and classifying similar events from this database, it is possible to determine the presence or absence of a precursory tendency before the occurrence of a failure, and to predict and prevent the failure of the power plant 1. It may be used for maintenance, etc. Specifically, the control unit (or failure tendency determination unit) may determine the presence or absence of failure tendency based on a database that aggregates the positions of the radio signal and the tag body. That is, information that aggregates the positions of the radio signal and the tag body is accumulated in a database, similar events are classified from the database, and the presence or absence of a precursory tendency before the occurrence of a failure is predicted and determined. For example, the classified event is compared with the current state, and the tendency of the failure is determined based on whether or not the current state is similar to the event in which the failure occurred.

The fuel identification system, the control system, the solid fuel crusher, and the fuel identification method described in each of the above-described embodiments are grasped as follows, for example.
The fuel identification system according to the present disclosure is a fuel identification system for a plurality of types of solid fuels supplied to the crushing section (10) in the solid fuel crushing device (100), and the solid fuel is delivered to the crushing section (10). A detection unit (51) that detects identification information preset in a tag body (T) that is mixed with the solid fuel and can be separated from the solid fuel before being supplied, and the tag body from the solid fuel. A collection unit (52) for collecting (T) is provided.

According to the fuel identification system according to the present disclosure, the detection unit (51) detects the identification information from the tag body (T) mixed in the solid fuel before the solid fuel is supplied to the crushing unit (10). Therefore, it is possible to obtain information on the solid fuel to be supplied before it is supplied to the crushing unit (10). Since the tag body (T) can be separated from the solid fuel, the recovery unit (52) can recover the tag body (T) from the solid fuel. The collected tag body (T) can also be reused. Since the identification information can be obtained from the tag body (T) in advance (before being supplied to the crushing unit (10)), for example, information on the solid fuel to be supplied can be obtained to crush the solid fuel. The device (100) can also be controlled in advance to control the operating conditions corresponding to the solid fuel.

In the fuel identification system according to the present disclosure, the recovery unit (52) may be provided in the supply path of the solid fuel to the crushing unit (10).

According to the fuel identification system according to the present disclosure, by providing the recovery unit (52) in the supply path of the solid fuel to the crushing unit (10), the tag body (T) is provided before being supplied to the crushing unit (10). Can be recovered. Therefore, it is possible to reuse the tag body (T) and suppress the entry of the tag body (T) into the crushed portion (10).

In the fuel identification system according to the present disclosure, at least one of the specific gravity and the angle of repose may be set for the tag body (T) based on the characteristics of the solid fuel to be mixed.

According to the fuel identification system according to the present disclosure, the tag body (T) is moved in the same manner as the solid fuel in order to set the specific gravity and / or the angle of repose of the tag body (T) according to the characteristics of the mixed solid fuel. Can be done. That is, it is possible to suppress uneven distribution such as local concentration of the tag body (T) mixed in the solid fuel.

In the fuel identification system according to the present disclosure, the size of the tag body (T) is set based on the size of the solid fuel, and the recovery unit (52) is said to be based on the size of the tag body (T). The tag body (T) may be recovered from the solid fuel separately from the solid fuel.

According to the fuel identification system according to the present disclosure, by setting the size of the tag body (T) based on the size of the solid fuel, the tag body (T) can be efficiently recovered from the solid fuel. .. For example, the tag body (T) can be easily set to be large (slightly large) by a predetermined ratio or small (slightly small) by a predetermined ratio with respect to the size of the solid fuel, for example, by opening the mesh or wire mesh. Can be separated from solid fuel.

In the fuel identification system according to the present disclosure, the tag body (T) contains a magnetic material, and the recovery unit (52) separates the tag body (T) from the solid fuel by using a magnetic force, and the tag body (T) is separated from the solid fuel. The body (T) may be recovered.

According to the fuel identification system according to the present disclosure, since the tag body (T) contains a magnetic body, it is possible to efficiently recover the tag body (T) from the solid fuel by utilizing the magnetic force. .. For example, by attracting the tag body (T) using a magnet, it can be easily separated from the solid fuel.

The control system according to the present disclosure includes the above fuel identification system and a control unit (60) that controls the operating state of the solid fuel crusher (100) based on the identification information.

According to the control system according to the present disclosure, it is possible to control the operating state of the solid fuel crusher (100) based on the identification information detected before the solid fuel is supplied to the crushing unit (10). Therefore, the solid fuel crusher (100) can be controlled in advance. For example, it is possible to respond in advance to changes in the type of solid fuel supplied.

In the control system according to the present disclosure, the identification information is set for each of the solid fuels to which the tag body (T) is mixed, and the control unit (60) corresponds to the identification information and the solid. The operating state of the fuel crusher (100) may be controlled.

According to the control system according to the present disclosure, the operating state of the solid fuel crusher (100) is controlled for each solid fuel by setting the identification information for each solid fuel in which the tag body (T) is mixed. It becomes possible. That is, it is possible to control the solid fuel crusher (100) without delay in response to a change in the type of solid fuel. Therefore, it is possible to switch the solid fuel without stopping the solid fuel crusher (100).

In the control system according to the present disclosure, the identification information is set with boundary information corresponding to the tag body (T) mixed at the boundary position where the type of the solid fuel to be supplied is switched, and the control The unit (60) may control the operating state of the solid fuel crusher (100) according to the type of the solid fuel after switching based on the boundary information.

According to the control system according to the present disclosure, since the boundary information is set corresponding to the tag body (Ta) mixed in the boundary position where the type of solid fuel is switched, the boundary position is grasped and the solid fuel is crushed. It becomes possible to control the device (100). That is, it is possible to control the operating state of the solid fuel crusher (100) without delay according to the type of solid fuel after switching. Therefore, it is possible to switch the solid fuel without stopping the solid fuel crusher (100).

In the control system according to the present disclosure, the control unit (60) may control the operating state of the solid fuel crushing device (100) according to the detection amount of the identification information.

According to the control system according to the present disclosure, by controlling the solid fuel crusher (100) according to the detected amount of the identification information, the solid fuel crusher (100) can be appropriately controlled according to the state of the supplied solid fuel. Can be done. For example, when a plurality of types of solid fuels are supplied in a mixed state, the degree of mixing can be recognized as the detection amount of the identification information. It is possible to control the operating state of 100). The detection amount of the identification information is the number (detection number) of the tag bodies (T) that pass (detect) per unit time in the detection unit (51).

In the control system according to the present disclosure, the control unit (60) has the rotation speed of the classifier, the air volume of the crushed solid fuel transport gas, and the outlet side of the crushed unit (10) based on the identification information. The operation control target value may be controlled with respect to at least one of the temperature of the transport gas in the above and the crushing load of the crushing unit (10) for crushing the solid fuel.

According to the control system according to the present disclosure, the operating state of the solid fuel crusher (100) can be appropriately controlled according to the type of solid fuel by controlling the operation control target value based on the identification information. It will be possible. For example, by controlling the rotation speed of the classifier, it is possible to classify the fuel in the particle size range suitable for combustion in the burner portion (220). In addition, by controlling the air volume of the transport gas of the crushed solid fuel, the state of the fuel after crushing (particle size, particle size distribution, mass, mass distribution, bulk specific gravity, terminal velocity, etc. of the crushed fuel particles). It can be adapted to the operation. Further, by controlling the temperature of the conveyed gas on the outlet side of the crushed portion (10), the operation can be performed in accordance with the fuel (moisture content, etc.) after crushing. Further, the degree of crushing of the fuel can be adjusted by controlling the crushing load of the crushing unit (10) that crushes the solid fuel.

The control system according to the present disclosure includes a receiving unit (71) that receives a radio signal from the tag body (T) mixed in the stored solid fuel, and the control unit (60) is the radio signal. The position of the accumulated tag body (T) may be estimated based on the above.

According to the control system according to the present disclosure, the receiving unit (71) receives a radio signal from the tag body (T) mixed and accumulated in the solid fuel. Therefore, for example, the position of the tag body (T) accumulated by the plurality of receiving units (71) arranged at a predetermined position can be estimated. The storage position can be estimated from, for example, the radio field intensity and the phase difference.

In the control system according to the present disclosure, a plurality of receiving units (71) may be provided in the storage direction in which the solid fuel is stored.

According to the control system according to the present disclosure, the tag body (T) can be accumulated more accurately by providing a plurality of receiving units (71) in the accumulation direction with respect to the bunker (21) in which the solid fuel is accumulated. The position can be estimated.

In the control system according to the present disclosure, the tag body (T) has a temperature sensor (63), and the control unit (60) detects a temperature abnormality based on the received radio signal. , The medium may be supplied to the storage position of the corresponding tag body (T).

According to the control system according to the present disclosure, the tag body (T) has the temperature sensor (63), so that the temperature abnormality can be detected by the radio signal. Therefore, it can be assumed that the solid fuel accumulated at the estimated storage position is in an abnormal state. Therefore, the abnormal state is suppressed by supplying a medium that suppresses the temperature rise of the solid fuel to the storage position. can do. Further, since the storage position can be estimated, it is not necessary to supply a medium for suppressing the temperature rise of the solid fuel to the entire stored solid fuel, and a medium for efficiently suppressing the temperature rise of the solid fuel is supplied. Therefore, it becomes possible to effectively suppress abnormalities.

In the control system according to the present disclosure, the control unit (60) may determine the presence or absence of a failure tendency based on a database that aggregates the radio signals and the positions of the tag bodies.

According to the control system according to the present disclosure, it is possible to determine the presence or absence of a failure tendency based on a past database.

The solid fuel crushing device (100) according to the present disclosure includes a crushing unit (10) for crushing solid fuel, a fuel supply machine (20) for supplying the solid fuel to the crushing unit (10), and the above control system. A solid fuel crusher (100) comprising.

The fuel identification method according to the present disclosure is a fuel identification method for a plurality of types of solid fuels supplied to the crushing section (10) in the solid fuel crushing apparatus (100), and the solid fuel is transferred to the crushing section (10). A step of detecting identification information preset in a tag body (T) that is mixed in the solid fuel and can be separated from the solid fuel before being supplied, and a step of detecting the tag body (T) from the solid fuel. A fuel identification method comprising a recovery step and.

1: Power plant 10: Mill (crushing part)
11: Housing 12: Rotating table 13: Roller 14: Drive unit 16: Rotary classifier (classifier)
16a: Blade 17: Fuel supply unit 18: Motor 19: Outlet 20: Coal supply machine 21: Banker 22: Conveyance unit 23: Motor 24: Down spout unit 30: Blower unit 30a: Hot gas flow path 30b: Cold gas flow path 30c: Hot gas damper 30d: Cold gas damper 31: Primary air ventilator (PAF)
32: Push-in air ventilator (FDF)
34: Heat exchanger 40: State detection unit 41: Bottom unit 42: Ceiling unit 45: Journal head 47: Support arm 48: Support shaft 49: Pressing device 51: Detection unit 52: Recovery unit 53: Rotary valve 54: Shared conveyor 55: Distribution conveyor 56: Distribution gate 60: Control unit 61: Case 62: Transmitter 63: Temperature sensor 71: Receiver 72: Sprinkler unit 100: Solid fuel crusher 100a: Primary air flow path 100b: Supply flow path 110: CPU
120: ROM
130: RAM
140: HDD
150: Communication unit 180: Bus 200: Boiler 210: Fireplace 220: Burner unit L1: Coal mine L2: Loading port L3: Reception port L4: Pellet factory L5: Fuel inlet L6: Coal storage yard L7: Silo R: Reception Machine T: Tag body Ta: Boundary tag body

Claims (16)

A fuel identification system for multiple types of solid fuel supplied to the crusher in a solid fuel crusher.
Before the solid fuel is supplied to the crushing unit, a detection unit that detects identification information preset in a tag body that is mixed with the solid fuel and can be separated from the solid fuel.
A recovery unit that recovers the tag body from the solid fuel,
Fuel identification system with. The fuel identification system according to claim 1, wherein the recovery unit is provided in a supply path for the solid fuel to the crushing unit. The fuel identification system according to claim 1 or 2, wherein the tag body has at least one of a specific gravity and an angle of repose set based on the characteristics of the solid fuel to be mixed. The size of the tag body is set based on the size of the solid fuel.
The fuel identification system according to any one of claims 1 to 3, wherein the recovery unit separates the tag body from the solid fuel according to the size of the tag body and recovers the tag body from the solid fuel. The tag body contains a magnetic material and contains a magnetic material.
The fuel identification system according to any one of claims 1 to 4, wherein the recovery unit uses magnetic force to separate the solid fuel from the solid fuel and recover the tag body from the solid fuel. The fuel identification system according to any one of claims 1 to 5.
A control unit that controls the operating state of the solid fuel crusher based on the identification information,
Control system with. The identification information is set for each of the solid fuels to which the tag body is mixed.
The control system according to claim 6, wherein the control unit controls an operating state of the solid fuel crusher in response to the identification information. Boundary information is set in the identification information corresponding to the tag body mixed in the boundary position where the type of the solid fuel to be supplied is switched.
The control system according to claim 6, wherein the control unit controls an operating state of the solid fuel crusher according to the type of the solid fuel after switching based on the boundary information. The control system according to any one of claims 6 to 8, wherein the control unit controls an operating state of the solid fuel crusher according to the detected amount of the identification information. Based on the identification information, the control unit crushes the rotation speed of the classifier, the air volume of the crushed solid fuel transport gas, the temperature of the transport gas at the outlet side of the crusher, and the solid fuel. The control system according to any one of claims 6 to 9, which controls an operation control target value with respect to at least one of the crushing loads of the crushing portion. A receiver for receiving a radio signal from the tag body mixed in the accumulated solid fuel is provided.
The control system according to any one of claims 6 to 10, wherein the control unit estimates the position of the accumulated tag body based on the radio signal. The control system according to claim 11, wherein a plurality of receiving units are provided in the storage direction in which the solid fuel is stored. The tag body has a temperature sensor and
The control system according to claim 11 or 12, wherein when the control unit detects a temperature abnormality based on the received radio signal, the control unit supplies a medium to the corresponding storage position of the tag body. The control system according to any one of claims 11 to 13, wherein the control unit determines the presence or absence of a failure tendency based on a database that aggregates the radio signal and the position of the tag body. A crusher that crushes solid fuel,
A fuel supply machine that supplies the solid fuel to the crushing section,
The control system according to any one of claims 6 to 14.
A solid fuel crusher equipped with. It is a fuel identification method for a plurality of types of solid fuels supplied to a crushing unit in a solid fuel crushing device.
Before the solid fuel is supplied to the pulverized portion, a step of detecting identification information preset in a tag body that is mixed with the solid fuel and can be separated from the solid fuel, and a step of detecting the identification information.
The step of recovering the tag body from the solid fuel and
Fuel identification method having.

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