CN105806069A - Lignite machining system with smashing and drying functions - Google Patents
Lignite machining system with smashing and drying functions Download PDFInfo
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- CN105806069A CN105806069A CN201610277253.2A CN201610277253A CN105806069A CN 105806069 A CN105806069 A CN 105806069A CN 201610277253 A CN201610277253 A CN 201610277253A CN 105806069 A CN105806069 A CN 105806069A
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- drying
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- lignite
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
- F26B17/10—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle, e.g. pneumatic, flash, vortex or entrainment dryers
- F26B17/107—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle, e.g. pneumatic, flash, vortex or entrainment dryers pneumatically inducing within the drying enclosure a curved flow path, e.g. circular, spiral, helical; Cyclone or Vortex dryers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
- F23K3/02—Pneumatic feeding arrangements, i.e. by air blast
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H3/00—Air heaters
- F24H3/006—Air heaters using fluid fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H3/00—Air heaters
- F24H3/02—Air heaters with forced circulation
- F24H3/025—Air heaters with forced circulation using fluid fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1854—Arrangement or mounting of grates or heating means for air heaters
- F24H9/1877—Arrangement or mounting of combustion heating means, e.g. grates or burners
- F24H9/1881—Arrangement or mounting of combustion heating means, e.g. grates or burners using fluid fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/14—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects using gases or vapours other than air or steam, e.g. inert gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/001—Handling, e.g. loading or unloading arrangements
- F26B25/002—Handling, e.g. loading or unloading arrangements for bulk goods
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/005—Treatment of dryer exhaust gases
- F26B25/007—Dust filtering; Exhaust dust filters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K2201/00—Pretreatment of solid fuel
- F23K2201/10—Pulverizing
- F23K2201/1006—Mills adapted for use with furnaces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K2203/00—Feeding arrangements
- F23K2203/006—Fuel distribution and transport systems for pulverulent fuel
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Food Science & Technology (AREA)
- Drying Of Solid Materials (AREA)
Abstract
Disclosed is a lignite machining system with smashing and drying functions. The lignite machining system comprises a feed system, a hammer mill, an airflow drying oven, a pipeline, a cyclone material receiving device, a cloth bag powder receiving device, a main induced draft fan, an air heating furnace and an automatic material returning system. The airflow drying oven and the pipeline are connected with the hammer mill. The lignite machining system has the characteristics that the hammer mill is provided with the drying oven, so that a smashing and drying all-in-one machine is formed; a discharge outlet of a fuel cyclone dust collector and an discharge outlet of a cyclone dust collector are connected with a dynamic charging bin; two screw conveyers are arranged in the dynamic charging bin; and the two discharge outlets lead to a discharge scraper conveyer and a fuel blowing inlet of the air heating furnace correspondingly. The lignite machining system has the function that smashed and dried lignite powder is fed to the air heating furnace automatically and the coking prevention function on the air heating furnace, and has a series of facilities through which prevention of combustion and explosion in the lignite machining process is ensured. The technology is simplified, the occupied space is reduced, and the manufacturing cost and operation cost are reduced.
Description
Technical field
The invention belongs to a kind of coal drying plant, particularly a kind of have pulverizing, drying integrated brown coal system of processing.
Background technology
Brown coal are the main fuels in current thermal power plant, due to raw coal moisture content higher (reaching more than 40%), and lumpiness is not etc., in order to give full play to exerting oneself of electromotor, brown coal must be pulverized, dry and make its granularity reach less than 5 millimeters, moisture less than 15%.At present, it is first pulverize with pulverizer to be dried machine drying more mostly, dries and generally adopt roller drier.Prior art has the drawback that: complex process, floor space are big, cost is high, operating cost is high.
Summary of the invention
It is an object of the invention to provide a kind of pulverizing by brown coal and dry in the system of processing of one, there is the coal dust that will pulverize after drying, automatically the function of air stove feed is given, air stove anti-coking function, and a series of facilities ensureing to prevent burning, blast in the brown coal course of processing are provided, technique simplifies, reduces floor space, reduces cost and operating cost.
Present invention provide the technical scheme that include feeding system, beater grinder and with the pneumatic conveying drying case of its disjunctor and pipeline, whirlwind collector, cloth bag collection machine, main induced draft fan, air stove, automatic revert system, it is characterized in that: outer housing inwall and the top drying baker of beater grinder are made up of abrasion-proof manganese steel plate；Casing side is provided with charging aperture and hot wind inlet, and charging aperture arranges airlock, and hot wind inlet connects hot air furnace hot air outlet by hot-blast pipe line: drying casing top is Drying；Drying top is connected with whirlwind collector charging aperture by pipeline, constitutes and pulverizes and drying integral machine；
The outlet of whirlwind collector air inducing connects the air inducing entrance of sack cleaner, and the discharging opening of whirlwind collector connects discharging drag conveyor by airlock；The outlet of sack cleaner connects cloth bag rewinding auger, and the port of export of cloth bag rewinding auger is connected to dynamic feeding chamber by airlock；The another charging aperture being connected fuel cyclone dust extractor in the airlock rear end of whirlwind collector discharging opening by suction tube, the discharging opening of this cyclone dust extractor is connected to dynamic feeding chamber by airlock；Two conveying worms of forward and reverse operating are set in dynamic feeding chamber, tail end at two conveying worms respectively arranges discharging opening, one discharging opening leads to discharging drag conveyor, and another discharging opening leads to the fuel inlet of air stove by fuel airlock and converying feeding tube；The air inducing outlet of sack cleaner is connected by air-introduced machine returns wind pipeline, returns wind pipeline and connects the chimney of air stove, returns to arrange on wind pipeline and return air valve.
Hot-blast furnace body is cylinder type, and appearance is Plate Welding, and inner lining refractory block arranges insulation material between refractory brick and outer steel plate, the bottom of body of heater has natural air inlet mouth, under air-introduced machine effect, and can inspiration combustion air；Having fuel inlet from, 1.5 meters, bottom, fuel inlet connects converying feeding tube and fuel blower fan, is being that 90 ° of places are equipped with combustor with fuel inlet；On the cross section of upwards 150 millimeters of fuel inlet, downward 150 millimeters and downward 450 millimeters, assemble two wind-supplying mouths in 180 ° of symmetric positions level in inwall tangential direction respectively, blower fan be blown into natural wind；The chimney top of body of heater is equipped with electric gate valve, and the hot-blast outlet of body of heater is equipped with electric gate valve and temperature detection sensor.
The positive effect of the present invention: 1, two processing technique are dried in pulverizing and completed by an equipment, simplify equipment, reduce floor space, reduce investment outlay, reduce operating cost.2, having the coal dust that will pulverize after drying, automatic returning charge is to the function of air stove feed, it is achieved fuel is self-supporting, and reduces for combustion equipment, and realizes automatization.3, air stove automatic ignition, anti-coking function, overcome the difficult problem that brown coal combustion furnace ignition is difficult, anti-coking is difficult.4, adopt system tail gas return wind to drying system lower the temperature, it is prevented that system oxygen exceed standard and prevent unexpected fracture system temperature exceed standard cause brown coal burning, blast measure, provide guarantee for system safety operation.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Fig. 2 is beater grinder structural representation.
Fig. 3 is air stove structural representation.
Fig. 4 is lower portion of furnace body structure enlarged diagram.
Fig. 5 is the A-A sectional view of Fig. 4.
Fig. 6 is the B-B sectional view of Fig. 4.
Fig. 7 is the C-C sectional view of Fig. 4.
Fig. 8 is by fuzzy control instrument control scraper feeding machine speed flow chart.
Fig. 9 is by fuzzy control instrument control fuel blower fan flow chart.
Figure 10 is air stove automatic ignition control flow chart.
Figure 11 is the control circuit schematic diagram of fuzzy control instrument control fuel blower fan.
Figure 12 is the control circuit schematic diagram of fuzzy control instrument control scraper feeding machine.
Figure 13 is that PLC controls the electrically operated valve of air stove and the control circuit schematic diagram of each blower fan.
Figure 14 prevents from burning sack cleaner, controls hot blast temperature flow chart.
Figure 15 is that PLC controls hot blast temperature circuit diagram.
Detailed description of the invention
Seeing Fig. 3-7, the concrete structure of air stove is as follows: body of heater 4 is the cylinder type of outside diameter 3 meters, is divided into three layers, is assembled by three cylindrical portions from top to bottom and constitutes, with Flange joint, and its respectively 2 meters highly from bottom to up, 1.5 meters, 1.5 meters.Appearance is Plate Welding, and inner lining refractory block arranges the adiabator layer made firm by ramming between refractory brick and outer steel plate；Furnace base is the octagonal that channel-section steel is welded into, body of heater 4 bottom layer bottom have eight natural air inlet mouth 4-1 (see Fig. 4,5), under outside air-introduced machine (not shown) effect, can inspiration combustion air；Having fuel mouth blown 2 from, 1.5 meters, bottom, body of heater outer end fuel mouth blown connects converying feeding tube 35 and fuel blower fan 24(and sees Fig. 1), be that 90 ° of places arrange the combustor bocca 4-3 spraying diesel oil on same circumference with it and with it；Each on fuel mouth blown 2 upwards 150 millimeters, each circumference of downward 150 millimeters and downward 450 millimeters arrange in two wind-supplying mouths 3 180 ° symmetrical, upper, middle and lower is totally six wind-supplying mouths, each wind-supplying mouth 3 is all arranged along inwall tangential direction, and each wind-supplying mouth 3 is connected by air channel mends blower fan 1, is blown into natural wind.Chimney 7 top, equipped with electric gate valve 8, connects hot air duct 6 bottom smoke exhaust barrel 7, hot air duct 6 exports this mouthful of 6-1(and connects main drying hot air duct) equipped with electric gate valve 5 and temperature detection sensor T1-1；The top of body of heater arranges temperature detection sensor T1.The sidewall of body of heater bottom arranges maintenance fire door 4-2, and people can enter clearing furnace.
Above-mentioned fuel blower fan adopts fuzzy control instrument control system, and control circuit adopts available circuit structure (see Figure 11), and the transducing signal interface of fuzzy control instrument connects temperature detection sensor T1, and the control signal outfan of fuzzy control instrument connects fuel blower fan 24 converter.
Operating process and operation principle (see figure 10): before blow-on, electric gate valve 8 is closed, electric gate valve 5 is crack, and wind-supplying mouth 3 is closed.Outside drying machine main induced draft fan is opened, and natural wind sucks naturally from furnace bottom natural air inlet mouth 4-1, is formed as tiny structure in air stove.Combustor is lighted by bocca 4-3 to flame in stove, opens fuel blower fan, is sprayed into by brown coal powder by fuel mouth blown 2.Meet with the combustor column of flame in stove center, burn rapidly.Meanwhile, open electric gate valve 5 and mend blower fan 1.Under natural wind and air inducing combined effect, making stove fire burn more prosperous and more prosperous, the column of flame tangentially rotates rising along furnace wall, until the whole after-flame of top fuel.Mending wind due to secondary is that in tangential direction is blown into.Form one layer of cold wind film in furnace wall with the column of flame, reach to prevent the purpose in furnace wall coking.
See Fig. 1,9, air stove outlet temperature detection sensor T1-1 is by the fuel blower fan of fuzzy control instrument control frequency control.According to drying process requirement before start, exported pathogenic wind-warm and demarcated (less than lignite ash fusing point 1050 DEG C) slagging prevention, thermo-field thoery, reduce fuel feed, otherwise increase.
Seeing Figure 13, adopt PLC to control the electrically operated valve of air stove and the control circuit employing available circuit structure of each blower fan, the thermal module of PLC connects temperature detection sensor；DO module many groups switch control interface of PLC connects the electric valve controller 5,8 of air stove and the blower fan of wind-supplying mouth 3 respectively.Simultaneously DO module connects catalyst KA1, KA2, KA3 respectively, and is connected respectively by catalyst KA1, KA2, KA3 and main draw phoenix machine, combustion air fan, benefit blower fan.
See Fig. 1,2, outer housing 32 inwall and top drying baker 34 inwall of beater grinder 33 are made up of abrasion-proof manganese steel plate；
The structure of beater grinder 33 adopts prior art, arranges the empty axle 33-2 of a logical supercooled water, and this axle is supported on bearing block 33-1, fixes hammerhead jib 33-3 multiple rows of on axle, and hammerhead jib 33-3 upper end is equipped with replaceable after movable tup 33-4(abrasion)；Casing top is square drying baker 34, and the side of square drying baker 34 is provided with charging aperture 34-1 and hot wind inlet 34-2；Raw material cabin 9 connects scraper feeding machine 11, and the tail end of scraper feeding machine 11 connects charging aperture 34-1, and charging aperture 34-1 arranges airlock 12, and hot wind inlet 34-2 connects hot air furnace hot air outlet 6-1 by hot-blast pipe line 6: drying baker 34 top is Drying 13；Drying 13 top is connected with whirlwind collector 14 charging aperture by pipeline, constitutes and pulverizes and drying integral machine；The major parameter of crushing dryer:
1. installed capacity 250 kilowatts
2. spindle revolutions 600 revs/min
3. import pathogenic wind-warm 600 ° ~ 950 ° (adjustable)
4. outlet pathogenic wind-warm 90 ~ 120 °
5. the amount of anhydrating 3000 ~ 3500 kilograms/time
6. crushing dryer extracts the granularity of brown coal out by the blast velocity control discharging machine.
Above-mentioned scraper feeding machine 11 adopts fuzzy control instrument control system (see Figure 12), control circuit adopts available circuit structure, the transducing signal interface of fuzzy control instrument connects temperature detection sensor T3, the control signal outfan of fuzzy control instrument connects scraper feeding machine converter, thus controlling the frequency conversion motor of scraper feeding machine 11.
Seeing Fig. 1, the outlet of whirlwind collector 14 air inducing connects the air inducing entrance of sack cleaner 18 by induced pipe 16, and the discharging opening of whirlwind collector 14 is connected to discharging drag conveyor 31 by airlock 30；The outlet of sack cleaner 18 connects cloth bag rewinding auger 21, and the port of export of cloth bag rewinding auger 21 is connected to dynamic feeding chamber 23 by airlock 22；The another charging aperture being connected fuel cyclone dust extractor 17 in the rear end of whirlwind collector discharging opening airlock 30 by suction tube, the discharging opening of this cyclone dust extractor is connected to dynamic feeding chamber 23 by airlock 28；Two conveying worm 29-1 and 27 of forward and reverse operating are set in dynamic feeding chamber 23, tail end at two conveying worms respectively arranges discharging opening, one discharging opening 29 leads to discharging drag conveyor 31, and another discharging opening 26 leads to the fuel inlet 2 of air stove by fuel airlock 25 and converying feeding tube 35, fuel conveying fan 24；The air inducing outlet of sack cleaner 18 connects main induced draft fan 20 by air inducing pipeline 19, and the air port of returning of main induced draft fan 20 connects the chimney 7 of air stove by returning airduct 10, returns to arrange on airduct 10 and returns wind-powered electricity generation movable valve 10-1；The air port of returning of main induced draft fan 20 is simultaneously connected with smoke evacuation chimney.The induced pipe of whirlwind collector 14 arranges explosion proof door 15, the induced pipe of the air inducing import and export of sack cleaner 18 arranges explosion proof door F2, F3；The hot-blast pipe line of drying baker 34 hot wind inlet 34-2 arranges temperature point T2, Drying 13 at drying baker 34 top arranges temperature point T3 on the connecting line with whirlwind collector 14 charging aperture, and the air inducing import and export pipeline of sack cleaner 18 is respectively provided with temperature point T4 and T5.These measuring points are all connected with control circuit.
Operation principle:
nullWet coal dust is entered scraper feeding machine 11 by feeding chamber 9，Drying machine 33 is entered by feeding air seal machinery 12，And herein with the hot blast comprehensive engagement from air stove 4，Pulverizing limit, limit is dried，Material after drying sucks whirlwind collecting machine 14 and carries out material wind separation，Material is discharged by discharging airlock 30，Enter discharging drag conveyor 31，Tail gas enters sack cleaner 18 and discharges，The powder separated is by cloth bag rewinding cage 21、Cloth bag discharging airlock 22 enters dynamic feed bin 23，Simultaneously for preventing the material that cloth bag is collected from can not meet the needs of air stove，Fuel whirlwind collector 17 can extract a part of fine powder from the feed opening of discharging airlock 30 and enter dynamic feed bin 23 by fuel whirlwind airlock 28，Dynamic feed bin 23 can first ensure the fuel supply of air stove 4，Unnecessary material is then discharged into discharging drag conveyor 31 from top，Fuel is joined in fuel converying feeding tube 35 by the conveying worm 29-1 in dynamic feed bin 23 by fuel airlock 25，Air stove 4 tangentially it is blown into by fuel conveying fan 24，Blower fan 1 combustion-supporting under complete fuel combustion and burn，And form high-temperature flue gas.High-temperature flue gas utilizes furnace roof electrically operated valve 8 and enters in drying baker 34 with after the tail gas mixing homoiothermic returned by hot air duct 6, is used as to dry medium.
See Fig. 8, moisture Control illustrates: temperature signal is fed back to fuzzy control instrument equipped with temperature sensor T3, temperature sensor T3 by the outlet in drying system, after fuzzy control instrument processes signal, control the feeding speed of scraper feeding machine 11, with this inlet amount controlling to enter drying system.When in drying system, thermal source is partially stabilized, and air quantity is stablized, in control, doses controls end product moisture, when outlet temperature raises, finished product water content reduces, and fuzzy control instrument control scraper feeding machine accelerates to improve inlet amount, outlet temperature reduces, and moisture content of finished products raises.By adjusting fuzzy control instrument parameter, make dehydrator outlet temperature stable in setting value, it is ensured that moisture content of finished products.
Fuel auto-returned system: dynamic feed bin 23 is set, dynamic feed bin 23 top is provided with two charging apertures, two charging apertures are connected respectively through the airlock 22,28 discharging opening with sack cleaner 18 and fuel whirlwind collector 17 suction outlet, and fuel whirlwind collector 17 import is connected with whirlwind collector 14 discharging opening；Top in dynamic feed bin 23, bottom be respectively provided with forward and reverse conveying worm 29-1,27, transport screw conveyer 29-1 outlet connects dry product outfeed belt conveyor 31, reverse acting spiral conveyer 27 exports and is connected to air stove fuel mouth blown 2 by airlock 25 and returning charge pipeline 35, sends into air stove as fuel.Its operation principle is: the material that sack cleaner 18 is collected all sends into dynamic feed bin 23 by rewinding auger 21, the siccative that fuel whirlwind collector 17 is collected is also into dynamic feed bin 23, dry material is sent into revert system by dynamic feed bin 23 lower part helical conveyer 27, when dynamic feed bin 23 is full of, unnecessary siccative is entered conveyer 31 by top conveying worm 29-1, to dry brown coal output of products.
The returning charge conveying worm 27 of dynamic feed bin 23 is driven by frequency control motor, and the temperature signal sent by air stove internal temperature sensor controls (control circuit is prior art), it may be assumed that thermo-field thoery slows down, on the contrary speedup.
Native system is anti-burning, blast protection measure and principle:
1, the fuel of air stove is the fine powder (a small amount of finished product siccative) collected from sack cleaner 18 after native system is dried, moisture content is low and is fine powder, spray in stove, under secondary wind and main air inducing effect, burn along the spiral of furnace wall, and body of heater is higher, therefore coal dust can be made fully to burn, it does not have uncombusted Mars enters drying machine.
2, for making coal dust fully burn, air stove top flue-gas temperature is as far as possible high (fusing point 1050 DEG C lower than brown coal ash)；But enter the hot blast temperature of breaking drier, it is necessary to lower than brown coal burning-point 400 degree, cold wind need to be filled into for this.Simultaneously, for making the oxygen content that in dry run, hot blast oxygen content is ignited lower than brown coal, native system adopts the tail gas backflow part that drying system is discharged, wind is mended as cooling, for this, cold wind is added before hot blast enters drying machine, make it lower the temperature, ensure that drying system oxygen content is lower than brown coal powder ignition amount, take the tail gas (temperature 90 ~ 100 DEG C drying system discharged, oxygen content about 10%), by returning wind pipeline 10, it is blown into air stove top by main induced draft fan 20, air stove outlet pathogenic wind-warm is made to be down to not higher than 400 DEG C, return air quantity and account for the 50% of exhaust emissions amount, controlled by the air valve 10-1 that returns returned on wind pipeline.
3, Figure 14 is seen, suddenly interrupt for anti-locking system feed, cause the pulverizing unexpected temperature rise of drying system, burn the accident of sack cleaner 18, in sack cleaner 18 porch equipped with temperature sensor T4, and demarcate normal running temperature 120 DEG C, once temperature exceeding standard, make breaking drier import electrically operated valve 5 close by automaton, cut off thermal source；Air stove overhead electric valve 8 is opened, and makes hot blast enter air thus protecting sack cleaner 18.Seeing Figure 15, adopt PLC to control the electrically operated valve of air stove, to control the hot blast temperature before sack cleaner 18, control circuit adopts available circuit structure, and the thermal module of PLC connects temperature detection sensor T4；Two groups of switch control interface of the DO module of PLC connect the electrically operated valve 5,8 of air stove respectively.
Claims (2)
1. a brown coal system of processing with pulverizing, drying function, including feeding system, beater grinder and with the pneumatic conveying drying case of its disjunctor and pipeline, whirlwind collector, cloth bag collection machine, main induced draft fan, air stove, automatic revert system, it is characterized in that: outer housing inwall and the top drying baker of beater grinder are made up of abrasion-proof manganese steel plate；Casing side is provided with charging aperture and hot wind inlet, and charging aperture arranges airlock, and hot wind inlet connects hot air furnace hot air outlet by hot-blast pipe line: drying casing top is Drying；Drying top is connected with whirlwind collector charging aperture by pipeline, constitutes and pulverizes and drying integral machine；
The outlet of whirlwind collector air inducing connects the air inducing entrance of sack cleaner, and the discharging opening of whirlwind collector connects discharging drag conveyor by airlock；The outlet of sack cleaner connects cloth bag rewinding auger, and the port of export of cloth bag rewinding auger is connected to dynamic feeding chamber by airlock；The another charging aperture being connected fuel cyclone dust extractor in the airlock rear end of whirlwind collector discharging opening by suction tube, the discharging opening of this cyclone dust extractor is connected to dynamic feeding chamber by airlock；Two conveying worms of forward and reverse operating are set in dynamic feeding chamber, tail end at two conveying worms respectively arranges discharging opening, one discharging opening leads to discharging drag conveyor, and another discharging opening leads to the fuel inlet of air stove by fuel airlock and converying feeding tube；The air inducing outlet of sack cleaner is connected by air-introduced machine returns wind pipeline, returns wind pipeline and connects the chimney of air stove, returns to arrange on wind pipeline and return air valve；
Hot-blast furnace body is cylinder type, and appearance is Plate Welding, and inner lining refractory block arranges insulation material between refractory brick and outer steel plate, the bottom of body of heater has natural air inlet mouth, under air-introduced machine effect, and can inspiration combustion air；Having fuel inlet from, 1.5 meters, bottom, fuel inlet connects converying feeding tube and fuel blower fan, is being that 90 ° of places are equipped with combustor with fuel inlet；On the cross section of upwards 150 millimeters of fuel inlet, downward 150 millimeters and downward 450 millimeters, assemble two wind-supplying mouths in 180 ° of symmetric positions level in inwall tangential direction respectively, blower fan be blown into natural wind；The chimney top of body of heater is equipped with electric gate valve, and the hot-blast outlet of body of heater is equipped with electric gate valve and temperature detection sensor.
2. the brown coal system of processing with pulverizing, drying function according to claim 1, is characterized in that: arrange explosion proof door on the induced pipe of the air inducing import and export of sack cleaner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610277253.2A CN105806069A (en) | 2016-05-01 | 2016-05-01 | Lignite machining system with smashing and drying functions |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610277253.2A CN105806069A (en) | 2016-05-01 | 2016-05-01 | Lignite machining system with smashing and drying functions |
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| CN105806069A true CN105806069A (en) | 2016-07-27 |
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|---|---|---|---|
| CN201610277253.2A Pending CN105806069A (en) | 2016-05-01 | 2016-05-01 | Lignite machining system with smashing and drying functions |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106269160A (en) * | 2016-08-26 | 2017-01-04 | 孟玲 | A kind of powder processing system with deferrization functional |
| CN110779279A (en) * | 2019-12-20 | 2020-02-11 | 徐州天正活性炭厂 | Wood chip drying spontaneous combustion preventing system for activated carbon production |
| US20220178610A1 (en) * | 2020-09-21 | 2022-06-09 | Brian James | Biomass dryer |
| CN116026130A (en) * | 2023-03-28 | 2023-04-28 | 清华大学 | Drying device |
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| CN110779279A (en) * | 2019-12-20 | 2020-02-11 | 徐州天正活性炭厂 | Wood chip drying spontaneous combustion preventing system for activated carbon production |
| US20220178610A1 (en) * | 2020-09-21 | 2022-06-09 | Brian James | Biomass dryer |
| CN116026130A (en) * | 2023-03-28 | 2023-04-28 | 清华大学 | Drying device |
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