JPH05106818A - Refuse incinerator - Google Patents

Abstract

PURPOSE:To improve the smoke reduction effect of a refuse incinerator. CONSTITUTION:A refuse incinerator 1 has a primary chamber 3 where combustible refuse 2 is stored and a secondary chamber 5 where incombustible refuse 4 is stored. A primary burner, a control valve and a water nozzle 16 are controlled by a primary chamber temperature controller 25 to incinerate the combustible refuse 2. A secondary burner 11 and a water nozzle 17 are controlled by a secondary chamber temperature controller 26 to heat the incombustible refuse 4. A control valve 21 is controlled by an oxygen concentration controller 27 to regulate air supplied from an air supply pipe 19 to an adequate flow rate and unburnt combustion gas that is produced when the combustible refuse is incinerated is heated up to high-temperatures, so that the amount of smoke to be discharged from a stack 7 is reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waste incinerator for incinerating waste, and more particularly to a waste incinerator for simultaneously performing incineration and heat treatment.

[0002]

2. Description of the Related Art Conventionally, for example, in a state in which combustible waste of infectious medical waste is stored in a primary chamber, the primary bar is used.
In a waste incinerator in which combustible waste is burned by a furnace, in order to remove unburned gas such as smoke generated in the process of burning the combustible waste in the primary chamber, the unburned gas is not transferred from the primary chamber to the secondary chamber. A smoke removing means is used in which the unburned gas is burned by guiding the combustion gas and raising the temperature of the secondary chamber by the secondary burner, and then exhausted to the outside of the furnace.

[0003]

The smoke removing means in the above conventional waste incinerator has a mixture state of the flame of the secondary burner and the unburned gas, and the unburned gas and the air supplied from the outside. If the mixing ratio is not appropriate, there is a problem that smoke cannot be sufficiently removed. Therefore, in the present invention, the unburned gas generated in the process of burning the combustible waste in the primary chamber is efficiently burned between the primary chamber and the secondary chamber to enable sufficient smoke removal. This is a technical issue to be solved.

[0004]

A technical means for solving the above-mentioned problems is to store combustible waste in a primary chamber, and to put incombustible waste into a secondary chamber communicated with the primary chamber. A waste incinerator configured to support combustion of the combustible waste by a primary burner and heat the noncombustible waste by a secondary burner in a state of being housed in a chamber, A high-speed burner for sucking and burning unburned gas generated in the process of burning the combustible waste in the primary chamber is provided between the primary chamber and the secondary chamber, and the high-speed burner is also provided. That is, an unburned gas suction port is provided near the corner.

[0005]

According to the waste incinerator having the above structure, the unburned gas generated in the process of burning the combustible waste in the primary chamber is sucked into the high speed burner together with the air from the unburned gas suction port, After being burned with the air, it is exhausted through the secondary chamber. When the unburned gas thus burned passes through the secondary chamber, it becomes a heat source for heating the incombustible waste contained in the secondary chamber and is further heated by the secondary burner or the like. Therefore, it is possible to efficiently burn the unburned gas.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a side sectional view of a waste incinerator for incinerating medical waste and the like, and FIG. 2 is AA of FIG.
FIG. As shown in FIG. 1, the waste incinerator 1 has a primary chamber 3 for incinerating combustible waste 2, that is, combustible materials and flame-retardant materials, and a non-combustible waste 4, that is, incombustible materials for sterilization treatment. A secondary chamber 5 for heat treatment of necessary infectious medical waste, for example, waste related to a syringe or the like, is provided so as to be in communication with each other. The combustible waste 2 stored in the primary chamber 3 is carried in with the closing door 6 of the primary chamber 3 opened. On the other hand, incombustible waste 4 stored in the secondary chamber 5
Is carried in through a door opening (not shown), and after being heat-treated, it is carried out through the same door opening. An exhaust pipe 7 is provided above the secondary chamber 5, and is configured to exhaust the combustion gas generated in the primary chamber 3 and the combustion gas generated in the secondary chamber 5. Further, the closing door 6 of the primary chamber 2
In front of, there is a pre-charging chamber 8, and in the pre-charging chamber 8,
A waste stand 9 for placing the combustible waste 2 before being stored in the primary chamber 2 is provided, and although not shown, the same is provided in the secondary chamber 5. ..

The side wall of the primary chamber 3 is provided with a primary burner 10 (see FIG. 2) using, for example, city gas as a fuel, and the secondary chamber 5 is provided with a secondary burner 11. It is provided. Further, a plurality of air outlets 12 are opened on both side surfaces of the primary chamber 3, and a plurality of air outlets 13 are also opened on the bottom surface. Each air outlet 12,13
Is connected to the air delivery pipe 14, and the air delivery pipe 1
Reference numeral 4 is connected to an air source (not shown). A control valve 15 (see FIG. 2) that adjusts the flow rate of the air blown out from each of the air outlets 12 and 13 is provided in the middle of the air delivery pipe 14.

On the ceiling of the primary chamber 3, a water nozzle 1 for injecting water into the primary chamber 3 in order to adjust the temperature in the primary chamber 3.
6 is provided, and a water nozzle 17 for injecting water into the secondary chamber 5 is provided on the side surface of the secondary chamber 5 in order to adjust the temperature in the secondary chamber 5.

A high speed burner 1 is provided between the primary chamber 3 and the secondary chamber 5.
8 are provided. An air supply pipe 19 is provided on the primary chamber 3 side of the high speed burner 18. The high-speed burner 18 is provided to burn unburned gas generated in the process of burning the combustible waste 2 in the primary chamber 3, while the air supply pipe 19 is provided by the high-speed burner 18 or the like. It supplies the air necessary for burning unburned gas.
An air delivery pipe 20 is connected to the air supply pipe 19, and the air delivery pipe 20 is connected to the air source. A control valve 21 for adjusting the flow rate of the air flowing out from the air supply pipe 19 is provided in the middle of the air delivery pipe 20.

The primary chamber 3 is provided with a temperature sensor 22 which detects the temperature in the primary chamber 3 and outputs a signal corresponding to the temperature. The primary chamber 3 and the secondary chamber An oxygen concentration sensor 23 that detects the oxygen concentration in the combustion gas and outputs a signal corresponding to the oxygen concentration is provided between 5 and 5. Further, a temperature sensor 24 that detects the temperature in the secondary chamber 5 and outputs a signal corresponding to the temperature is arranged above the secondary chamber 5. The primary chamber temperature controller 25 attached to a control panel or the like (not shown) recognizes the actual temperature of the temperature sensor 22 installation area by inputting the signal output from the temperature sensor 22. The primary burner 1 so that the temperature is maintained at a preset temperature.
0, the control valve 15, and the water nozzle 16 are controlled. In addition, the secondary chamber temperature controller 26 is the temperature sensor 2
The secondary burner 11 is designed to recognize the actual temperature of the temperature sensor 24 installation area by inputting the signal output from the secondary burner 11 and to keep the temperature at a preset temperature.
And the water nozzles 16 and 17 are controlled. Furthermore,
The oxygen concentration controller 27 receives the signal output from the oxygen concentration sensor 23, recognizes the oxygen concentration in the area where the oxygen concentration sensor 23 is arranged, and keeps the concentration at a preset concentration. The control valve 21 is controlled.

A screw conveyor 28 is provided substantially below the air supply pipe 19 to carry out the ash of the combustible waste 2 after being burned in the primary chamber 3 to the outside of the waste incinerator 1. ing. The screw conveyor 28 is provided with a plurality of air outlets 30 for blowing air from the central portion toward the outer peripheral portion. The plurality of air outlets 30 are connected to the air delivery pipe 14.
Further, the non-combustible waste 4 contained in the secondary chamber 5 is placed on the rustle 29 made of ceramic or the like.

Next, the operation of the waste incinerator 1 will be described.
With the temperature of the primary chamber 3 set by the primary chamber temperature controller 25 and the temperature of the secondary chamber 5 set by the secondary chamber temperature controller 26, the primary burner 10 and the secondary burner 10 After the burner 11 is ignited, the control valve 15 is set to the initial predetermined opening degree, and the temperature inside the furnace is raised, as shown in FIG.
When the non-combustible waste 4 is placed in the secondary chamber 3 and placed on the grate 29 of the secondary chamber 5, the combustible waste 2 starts to burn and the non-combustible waste 4 is heated. Be started. The high-speed burner 18 is also ignited as the combustible waste 2 starts to burn. When the combustion of the combustible waste 2 and the heating of the non-combustible waste 4 are started in this manner, the primary chamber temperature controller 25 detects the primary temperature based on the detection signal output from the temperature sensor 22. Recognizing the actual temperature of the chamber 3, the primary bar is set so that the actual temperature becomes the set temperature.
The control valve 10 and the control valve 15 are controlled. The secondary chamber temperature controller 26 recognizes the actual temperature of the secondary chamber 5 based on the detection signal output from the temperature sensor 24, and the secondary burner adjusts the actual temperature to the set temperature. Control 11

As described above, the primary room temperature controller 25 is
When the actual temperature of the primary chamber 3 exceeds the set temperature in the process of controlling the primary burner 10 and the control valve 15 so as to keep the actual temperature of the secondary chamber 3 at the set temperature. Opens the water nozzle 16 to inject water to lower the actual temperature of the primary chamber 3. Similarly, the secondary chamber temperature controller 26 controls the secondary burner 11 so that the actual temperature of the secondary chamber 5 is maintained at the set temperature.
When the actual temperature of the secondary chamber 5 exceeds the set temperature in the process of controlling the water temperature, the water nozzles 16 and 17 are opened to inject water to lower the actual temperature of the secondary chamber 5. .. The water nozzle 16 burns the combustible waste 2 in the primary chamber 3 in addition to lowering the actual temperature of the primary chamber 3 as described above, and then the next combustible waste 2 By injecting water from the water nozzle 16 before accommodating it in the chamber 3, the smoke from the rest of the combustible waste 2 due to the rapid inflow of outside air into the primary chamber 3 when the closing door 6 is opened is exhausted. 7 has the role of preventing a large amount of discharge.

In this way, the combustible waste 2 is burned and the non-combustible waste 4 is heated, and the oxygen concentration controller 27 inputs the signal output from the oxygen concentration sensor 23 to obtain the oxygen concentration. By recognizing the oxygen concentration in the area where the sensor 23 is arranged and controlling the control valve 21 so that the oxygen concentration is maintained at a preset concentration, the air supply pipe 1
The flow rate of the air supplied from 9 is adjusted, and the high-speed burner 1
8 or increase the combustion efficiency of the unburned gas by the secondary burner 11.

As described above, the unburned gas is secondarily combusted, and the combustion heat obtained by the combustion is used to heat the incombustible waste 4 placed on the loss stole 29 of the secondary chamber 5. Used as a heat source of. That is, the combustion heat of the unburned gas by the high-speed burner 18 or the like becomes a secondary combustion heat flow as shown in FIG. Is heated by.

The ash of the combustible waste 2 after being burned in the primary chamber 3 is dropped onto a screw conveyor 28, and is carried out of the waste incinerator 1 by the screw conveyor 28. In addition, the incombustible waste 4 is heated and then the secondary chamber 5
Is unloaded from the door opening (not shown).

[0017]

As described above, according to the present invention, the combustible waste is stored in the primary chamber, and the non-combustible waste is stored in the secondary chamber communicating with the primary chamber. Then the primary bar
In the waste incinerator configured to burn the incombustible waste with a secondary burner and heat the incombustible waste with a secondary burner, a high-speed burner is provided with a primary chamber and a secondary chamber.
Since the unburned gas suction port is provided near the high-speed burner while being arranged between the secondary chambers, the unburned gas generated in the process of burning the combustible waste in the primary chamber does not remain. The smoke removal effect is increased because the high-speed burner is sucked through the combustion gas suction port, burned with air, and then exhausted through the secondary chamber. Further, the combustion heat generated when the unburned gas is burned by the high-speed burner can be utilized as a heating source for the non-combustible waste contained in the secondary chamber.

[Brief description of drawings]

FIG. 1 is a side sectional view of an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

[Explanation of symbols]

 1 Waste incinerator 2 Combustible waste 3 Primary chamber 4 Non-combustible waste 5 Secondary chamber 6 Input door 7 Exhaust pipe 8 Pre-input chamber 9 Waste stand 10 Primary burner 11 Secondary bar Na 12 Air outlet 13 Air outlet 14 Air delivery pipe 15 Control valve 16 Water nozzle 17 Water nozzle 18 High speed burner 19 Air supply pipe 20 Air delivery pipe 21 Control valve 22 Temperature sensor 23 Oxygen concentration sensor 24 Temperature sensor 25 1 Secondary chamber temperature controller 26 Secondary chamber temperature controller 27 Oxygen concentration controller 28 Screw conveyor 29 Rostrul 30 Air outlet

 ─────────────────────────────────────────────────── ─── Continuation of the front page (71) Applicant 591117697 Asahi Kikai Co., Ltd. 3-2-1, Nishiki, Naka-ku, Nagoya-shi, Aichi (72) Inventor Akira Some Tenno-cho, Tenhaku-cho, Nagoya-shi, Aichi Prefecture 224 at No. 28 (72) Inventor Koichi Tanabe 39-22 Daikanmachi, Higashi-ku, Nagoya-shi, Aichi Prefecture Environmental Facilities Plan (72) Inventor Gen Moto Kawabata 3-2-1 Nishiki, Naka-ku, Aichi Prefecture Asahi Kikai (72) Inventor Shinpei Miura 1-161 Motohachi, Tenpaku-ku, Nagoya-shi, Aichi (72) Inventor Mikio Nakagawa 2-26 Hozo-cho, Nakagawa-ku, Nagoya-shi, Aichi

Claims (1)

[Claims] 1. Combustible waste is accommodated in a primary chamber, and incombustible waste is accommodated in a secondary chamber communicating with the primary chamber, and the combustion is performed by a primary burner. A waste incinerator configured to assist combustion of combustible waste and to heat the incombustible waste by a secondary burner or the like, the process of burning the combustible waste in the primary chamber A high-speed burner for sucking and burning the unburned gas generated in 1. was placed between the primary chamber and the secondary chamber, and an unburned gas suction port was provided near the high-speed burner. Waste incinerator characterized by.