WO2019075956A1

WO2019075956A1 - Incinerator for waste treatment and waste treatment system

Info

Publication number: WO2019075956A1
Application number: PCT/CN2018/074431
Authority: WO
Inventors: 刘振勇; 倪国生; 雷缘宝; 刘祥波
Original assignee: 珠海市云筒环保科技有限公司
Priority date: 2017-10-20
Filing date: 2018-01-29
Publication date: 2019-04-25
Also published as: CN107525082A

Abstract

An incinerator for waste treatment and a waste treatment system. The incinerator comprises a furnace (17). One side of the furnace (17) is provided with a blower (20) for supplying air into a grate (19). A primary combustion chamber and a secondary combustion chamber are sequentially provided above the grate (19). A first secondary fan (21) and a second secondary fan (22) are provided outside the furnace (17) to respectively supply air to the primary combustion chamber and the secondary combustion chamber. When a temperature in the primary combustion chamber reaches a set value, a draw pump (13) draws a landfill leachate from a leachate filtering pool and sprays the same to the primary combustion chamber to undergo gasification treatment, thereby achieving zero landfill leachate discharge. After waste has been burnt in the primary combustion chamber, a flue gas enters the secondary combustion chamber to undergo high-temperature combustion again, such that hazardous substances in the flue gas can be fully pyrolyzed. Afterwards, the resulting flue gas is treated by means of a flue gas treatment portion, thereby greatly reducing generation of dioxin.

Description

Burning furnace for waste treatment and garbage disposal system

Technical field

The invention relates to the technical field of garbage disposal, in particular to a combustion furnace for garbage disposal and a garbage disposal system.

Background technique

In recent years, with the increasing pollution of urban domestic garbage in China, the harmless treatment of garbage has attracted much attention. At present, domestic waste incineration plants generally use sprayed activated carbon to adsorb heavy metals and dioxins in flue gas, and cooperate with bag filter to collect soot, heavy metals and dioxins in the exhaust gas in the ash collected by the bag filter, although the bag is dusted. The flue gas at the outlet of the device reaches or falls below the current national environmental protection emission standards, but the heavy metals and dioxins in the bag dust collector ash (referred to as fly ash) are seriously exceeded. The domestically produced waste incinerator has a dioxin content of several thousand ng-TEQ/kg in the bag-collecting ash. The fly ash contains a large amount of harmful heavy metals and highly toxic organic substances, and the pollution control standard for domestic waste incineration (GB18485-2001) It is clearly pointed out that waste incineration fly ash is a hazardous waste and cannot be landfilled at random. Therefore, how to achieve zero emission of waste dioxin and reduce heavy metal emissions has important practical significance and application value.

Summary of the invention

In view of the problems existing in the prior art, the present invention provides a combustion furnace for waste treatment and a garbage disposal system, which can automatically treat garbage, and the combustion furnace can fully burn the garbage smoke, reduce the generation of dioxin, and the integrity of the treatment system is high. full functioning.

In order to achieve the above object, the present invention adopts the following technical solutions:

A combustion furnace for waste treatment, comprising a furnace body, one side of the furnace body is provided with a fuel tank for supplying oil for combustion in the furnace body, and a bottom of the furnace body is provided with a grate for burning garbage, One side of the furnace body is provided with a blower, and the inside of the grate is ventilated, and a combustion chamber and a second combustion chamber are sequentially arranged above the grate, and the first secondary fan and the second secondary fan are disposed outside the furnace body. The first secondary fan is ventilated to the combustion chamber through a first air duct, and the second secondary fan is ventilated to the second combustion chamber through a second air duct, and a leachate filter is further disposed outside the furnace a pool, the leachate filter tank is connected to the pump, and when the combustion temperature in the combustion chamber reaches a set value, the pump extracts the landfill leachate in the leachate filter tank and sprays into the combustion chamber. Performing gasification treatment, the flue gas combusted by the one combustion chamber is burned at a second high temperature in the second combustion chamber, the top of the furnace body is provided with a smoke exhaust pipe, and one side of the furnace body is further provided with slag removal Machine for discharging slag.

Further, the blower sends hot air of 100 ° C - 150 ° C to the grate to dry the garbage.

Further, the first air duct and the second air duct are both connected to both sides of the furnace body, and are respectively ventilated from the two sides to the one combustion chamber and the second combustion chamber.

Further, the combustion temperature of the garbage in the combustion chamber is 850 ° C - 1000 ° C, and when the temperature reaches the set high temperature 930 ° C - 1000 ° C, the landfill leachate is sprayed into the combustion chamber to vaporize, the second The combustion temperature of the flue gas in the combustion chamber is greater than 850 °C.

A garbage disposal system comprising the above-mentioned waste treatment combustion furnace, wherein a front end of the combustion furnace is connected to a pre-treatment part of the waste, a rear end is connected to the flue gas treatment part, and the pre-treatment part of the waste includes a raw material for storing the original garbage. a pool, the material pool is connected to a scale machine capable of transporting garbage, and a rear end of the scale machine is provided with a bag breaking machine capable of breaking a large garbage bag, and the rear end of the bag breaking machine is connected a garbage-spreading roller sieving machine, the rear end of the roller sieving machine is connected with a slanted belt conveyor, and the lower end of the belt conveyor is provided with a first collecting box for collecting shape rules or heavier The non-combustible garbage, the middle of the belt conveyor is provided with a magnetic separator capable of separating the iron-based garbage, and the bottom of the magnetic separator is provided with a second collection box, and the higher end of the belt conveyor is provided a crusher capable of crushing garbage, the rear end of the crusher being connected to a screw extrusion dewatering machine through a first screw conveyor for squeezing and dewatering the crushed garbage, and the bottom of the screw extrusion dewatering machine is provided Leachate filter tank, The rear end of the screw extrusion dewatering machine is connected to the temporary storage bin through a second screw conveyor, and the temporary storage bin is connected to the combustion furnace through a third screw conveyor, and the garbage enters the furnace body for combustion and combustion. The slag is discharged from the slag removing machine, and the four-effect denitration liquid is sprayed into the combustion chamber to remove sulfur-containing substances in the flue gas. The spray amount of the four-effect denitrification liquid is automatically controlled by the denitration control station, and the smoke after combustion The gas enters the flue gas treatment portion, and the flue gas treatment portion includes a smoke exhaust pipe disposed at a top of the furnace body, and the exhaust pipe is sequentially connected to the first stage heat exchanger and the second stage heat exchanger. The temperature of the flue gas in the first-stage heat exchanger and the second-stage heat exchanger is less than 200 ° C, and the end of the exhaust pipe is provided with a bag dust removing device capable of removing particulate matter, the bag The rear end of the dust removing device is connected to an activated carbon adsorption device capable of adsorbing dioxin, the rear end of the activated carbon adsorption device is connected to an induced draft fan, and the rear end of the induced draft fan is connected to a deacidification device capable of removing acidic substances in the flue gas. The rear end of the deacidification device is provided with a flue gas exhaust The chimney.

Further, the roller sieving machine includes a roller and a plurality of eccentric wheels disposed on the roller. When the roller rotates, the eccentric wheel taps the garbage to jump forward to disperse the garbage.

Further, the conveyor belt of the belt conveyor moves in a direction perpendicular to the drum axis of the roller screen.

Further, a cooling tower is disposed on a side of the first stage heat exchanger or the second stage heat exchanger, and the cooling tower is connected to the first stage heat exchanger and the second stage by a water pipe The heat exchanger is provided with a water pump, and the cooling water in the cooling tower is pumped into the first-stage heat exchanger and the second-stage heat exchanger.

Further, the acid removal monitoring point is arranged in the deacidification device, and the concentration of the acidic substance in the flue gas before deacidification is monitored in real time, and the information is fed back to the deacidification device, and the deacidification device automatically adjusts the spray off according to the concentration value. The amount of acid solution.

The beneficial effects of the invention:

Ventilation of the grate by the blower, drying the garbage entering the combustion furnace, reducing the water content in the garbage, facilitating combustion, drying the waste after high temperature combustion in a combustion chamber, and spraying the four-effect denitration liquid to treat sulfur in the flue gas When the temperature reaches the set high temperature value, the landfill leachate is sprayed into the furnace body for gasification treatment to achieve the purpose of zero discharge of landfill leachate. After the garbage is burned in a combustion chamber, the flue gas enters the second combustion chamber. The secondary high temperature combustion causes the harmful substances in the flue gas to be fully pyrolyzed. The burning furnace of the invention can fully decompose and decompose garbage and flue gas, and ventilates the furnace body through the air blower, the first secondary fan and the second secondary fan, so that the inside of the room causes a negative pressure, the odor does not overflow, and the odor is passed. The high temperature of the furnace body is decomposed after combustion, so that the garbage odor can be effectively controlled.

The garbage disposal system of the invention has high completeness, complete functions, centralized equipment, convenient garbage disposal, automatic control of operation of each device through the control room, automatic waste processing, and high processing efficiency. After the garbage is burned, the flue gas is cooled rapidly to less than 200 °C through the first-stage heat exchanger and the second-stage heat exchanger, so that the dioxin can not reach the synthesis condition, the generation of dioxins is greatly reduced, and then the activated carbon is passed through. The adsorption device adsorbs and intercepts the dioxins that cannot be avoided in the flue gas treatment, so that the finally discharged flue gas meets the national emission standards.

DRAWINGS

1 is a schematic structural view of a garbage disposal system of the present invention;

2 is a schematic structural view of a combustion furnace for garbage disposal according to the present invention;

In the figure, 1—raw material pool, 2—scalar machine, 3—breaking bag machine, 4—roller screening machine, 5-belt conveyor, 6—first collection box, 7—magnetic separator, 8—second Collection box, 9-crusher, 10-first screw conveyor, 11-screw extrusion dewatering machine, 12-leachate filter tank, 13-extraction pump, 14-second screw conveyor, 15- temporary storage silo , 16—third spiral conveyor, 17—furnace body, 18—fuel tank, 19—furnace, 20—blower, 21—first secondary fan, 22—second secondary fan, 23—first air duct, 24—Second duct, 25—slag slag machine, 26—smoke pipe, 27—hydraulic station, 28—first stage heat exchanger, 29—second stage heat exchanger, 30—cooling tower, 31—water tank 32—water pipe, 33—water pump, 34—bag dust removal tower, 35—activated carbon adsorption tower, 36—inclination fan, 37—deacidification tower, 38—chimney, 39—denitration control station, 40—control room, 41—first A processing chamber, 42 - a second processing chamber.

Detailed ways

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

It should be noted that all directional indications (such as up, down, left, right, front, back, ...) in the embodiments of the present invention are only used to explain between components in a certain posture (as shown in the drawing). Relative positional relationship, motion situation, etc., if the specific posture changes, the directional indication also changes accordingly. In addition, the descriptions of "first", "second", and the like in the present invention are used for the purpose of description only, and are not to be construed as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" and "second" may include at least one of the features, either explicitly or implicitly.

As shown in Fig. 1, the present invention provides a garbage disposal system including a waste treatment waste furnace, a waste pre-treatment portion connected to the front end of the combustion furnace, and a flue gas treatment portion connected to the rear end of the combustion furnace.

As shown in Fig. 2, the combustion furnace for garbage disposal includes a furnace body 17, and one side of the furnace body 17 is provided with a fuel tank 18 for supplying fuel for combustion in the furnace body 17. The bottom of the furnace body 17 is provided with a grate 19 for burning garbage, and the grate 19 is connected to the third screw conveyor 16, and the pre-treated garbage is sent into the furnace body 17. A hydraulic station 27 is also provided on the side of the furnace body 17 for controlling the movement of the grate 19. One side of the furnace body 17 is provided with a blower 20 to ventilate the inside of the grate 19, and the blower 20 is supplied with hot air of 100 ° C - 150 ° C to the grate 19 for drying the garbage, thereby reducing the water content in the garbage, which is beneficial to the garbage. combustion. A combustion chamber and a second combustion chamber are arranged in the upper part of the grate 19, and a first secondary fan 21 and a second secondary fan 22 are disposed outside the furnace body 17, and the first secondary fan 21 passes through the first air duct 23 to a combustion chamber. Ventilation, the second secondary fan 22 is ventilated to the secondary combustion chamber through the second air duct 24. In the present embodiment, the first air duct 23 and the second air duct 24 are both connected to both sides of the furnace body 17, from both sides. Ventilation into a combustion chamber and a secondary combustion chamber respectively, so that the furnace body 17 is sufficiently ventilated and burned more fully. In this embodiment, the combustion temperature of the garbage in a combustion chamber is 850 ° C - 1000 ° C, and the four-effect denitration liquid is sprayed to treat the sulfur-containing substance in the flue gas when the indoor garbage is burned, and the spray amount of the four-effect denitration liquid is denitrated. The control station 39 automatically controls, and the denitration control station 39 is provided with a monitoring instrument to monitor the concentration of the flue gas in real time, thereby automatically controlling the spray amount of the four-effect denitration liquid, and realizing the waste of the four-effect denitration liquid through real-time monitoring, and Make the final smoke meet national emission standards. A leachate filter tank 12 is further disposed outside the furnace body 17. The leachate filter tank 12 is used for collecting the water separated in the pre-treatment part of the waste and filtering, and the leachate filter tank 12 is connected to the pump 13 for burning. When the temperature reaches the set value (930 ° C - 1000 ° C), the pump 13 extracts the landfill leachate in the leachate filter tank 12 and sprays it into a combustion chamber for gasification treatment, thereby achieving the purpose of zero discharge of the landfill leachate. The flue gas burned in one combustion chamber stays in the second combustion chamber for more than 2 seconds for secondary high temperature combustion, and the temperature of the second high temperature combustion is greater than 850 ° C, so that the harmful substances in the flue gas are fully pyrolyzed. A slag removing machine 25 is further disposed on one side of the furnace body 17 for discharging the combustion slag, and a smoke exhausting pipe 26 is disposed at the top of the furnace body 17 for discharging the flue gas after combustion.

The combustion furnace of the invention ventilates the grate 19 through the air blower 20, and dries the garbage entering the combustion furnace, so that the water content in the garbage is reduced, which is favorable for combustion, and the high temperature combustion is carried out in a combustion chamber after the garbage is dried, and the four-effect denitration liquid is sprayed at the same time. The sulfur-containing substance in the flue gas is treated. When the temperature reaches 930°C-1000°C, the landfill leachate is sprayed into the furnace body 17 for gasification treatment, and the purpose of zero discharge of the landfill leachate is achieved, and the garbage is burned in a combustion chamber. The flue gas enters the secondary combustion chamber for secondary high-temperature combustion, so that the harmful substances in the flue gas are fully pyrolyzed.

As shown in Fig. 1, the above garbage disposal system further includes a pre-waste treatment portion and a flue gas treatment portion.

The pre-waste treatment part includes a raw material pool 1 for storing raw garbage, which is generally domestic garbage. The rear end of the raw material tank 1 is connected to a scale machine 2 capable of transporting garbage, and the garbage machinery in the raw material pool 1 is automatically transported to the next station. A bag breaking machine 3 is installed at the rear end of the scale machine 2, and the large garbage bag during the transportation of the scale machine 2 is broken to prepare for the next station to disperse the garbage. The rear end of the bag breaking machine 3 is connected with a roller screening machine 4 for dispersing garbage. The roller screening machine 4 includes a roller and a plurality of eccentric wheels disposed on the roller. When the roller is rotated by the motor, The eccentric wheel slaps the garbage and jumps forward to disperse the garbage, preparing for the next station metal separation and belt conveyor.

The rear end of the roller sieving machine 4 is connected with a slanted belt conveyor 5, and the lower end of the belt conveyor 5 is provided with a first collecting box 6, the belt moving direction of the belt conveyor 5 and the drum axis of the roller sieving machine 4. Vertically, the garbage will change the direction of movement when it reaches the conveyor belt, and let the garbage roll as much as possible. Because the conveyor belt has a certain upward inclination angle, the shape of the round shape (such as wine bottles, vases, etc.) is relatively heavy. Garbage that is incombustible or may cause damage to the crusher is rolled forward into the first collection box 6 by the bricks, iron cubes, etc., and the scattered garbage is more likely to pick out garbage that is incombustible or damages the crusher. In the middle of the belt conveyor 5, a magnetic separator 7 is provided. When all the scattered garbage passes through the magnetic separator 7, the iron garbage is separated, and the garbage is scattered to help suck out the iron garbage and reduce other garbage associated with the iron garbage. A second collection box 8 is provided at the bottom of the magnetic separator 7, and iron waste is collected. The higher end of the belt conveyor 5 is provided with a crusher 9, which breaks all the separated garbage to maintain the uniform size of the garbage, and ensures the stability and thoroughness of the garbage in the processing in the furnace body 17.

The rear end of the crusher 9 is connected to the screw extrusion dewatering machine 11 through the first screw conveyor 10, and the screw extrusion dewatering machine 11 presses and dewaters the crushed garbage to improve the stability and high efficiency of the combustion garbage. The leachate filter tank 12 is disposed at the bottom of the screw extrusion dewatering machine 11, and the extruded leachate is filtered into the leachate filter tank 12 to filter the granular waste. When the furnace body 17 is burned (930 ° C - 1000 ° C) When it is satisfied, the inside of the furnace body 17 is sprayed to vaporize the separated landfill leachate, so that the sewage is discharged. The rear end of the screw extrusion dewatering machine 11 is connected to the temporary storage bin 15 through the second screw conveyor 14, and the temporary storage bin 15 collects the fully processed garbage, and the temporary storage bin 15 passes through the third screw conveyor 16. It is connected to the combustion furnace to transport the garbage to the combustion furnace. The combustion process has been described above and will not be described again.

The flue gas treatment part comprises a smoke exhaust pipe 26 disposed at the top of the furnace body 17, and the flue gas generated after the high temperature combustion of the combustion furnace is discharged by the exhaust pipe 26, and the flue gas temperature at the inlet of the exhaust pipe 26 reaches 850 ° C - 1000 ° C, The smoke pipe 26 is sequentially connected to the first stage heat exchanger 28 and the second stage heat exchanger 29, and exchanges heat with the cooling water in the first stage heat exchanger 28 and the second stage heat exchanger 29, through the first stage. The temperature of the flue gas after heat exchange of the heat exchanger 28 is rapidly lowered to less than 600 ° C, and the temperature of the flue gas after heat exchange by the second-stage heat exchanger 29 is rapidly lowered to less than 200 ° C, so that the dioxin is not reached. The conditions of synthesis greatly reduce the formation of dioxins. A cooling tower 30 is disposed on the side of the first stage heat exchanger 28 or the second stage heat exchanger 29, and the water tank 31 of the cooling tower 30 is connected to the first stage heat exchanger 28 and the second stage heat exchanger 29 through the water pipe 32. The water pipe 32 is provided with a water pump 33, and the cooling water in the cooling tower 30 is pumped into the first-stage heat exchanger 28 and the second-stage heat exchanger 29 through the water pump 33, and exchanges heat with the high-temperature flue gas, and heat exchange is performed. The steam heat source can be optionally equipped with a power generation system to generate electricity through a steam heat source generated by heat exchange. One or more water temperature monitoring points are arranged in the water tank 31 of the cooling tower 30, and the temperature of the cooling water in the water tank 31 is detected in real time to ensure that the first stage heat exchanger 28 and the second stage heat exchanger 29 are supplied with cooling water of a suitable temperature. In order to quickly cool the smoke.

The end of the exhaust pipe 26 is provided with a bag dust removing device for removing particulate matter, generally a bag dust removing tower 34, and the rear end of the bag dust removing tower 34 is connected to an activated carbon adsorption device capable of adsorbing dioxins, generally an activated carbon adsorption tower 35, activated carbon The adsorption tower 35 adsorbs and intercepts the dioxins which cannot be avoided in the flue gas treatment, and achieves the purpose that the dioxin index meets the national standard discharge standard. The rear end of the activated carbon adsorption tower 35 is connected to the induced draft fan 36. The induced draft fan 36 can cause a negative pressure in the combustion furnace, and the induced draft fan 36 is placed behind the bag dust removal tower 34 and the activated carbon adsorption tower 35, in order to protect the induced draft fan 36 from being avoided. Accumulation of dust and the like causes a decrease in efficiency. The rear end of the induced draft fan 36 is connected to a deacidification device capable of removing acidic substances in the flue gas, generally a deacidification tower 37, and an acidity monitoring point is provided in the deacidification tower 37 to monitor the concentration of the acidic substance in the flue gas before deacidification in real time. And the information is fed back to the deacidification column 37, which automatically adjusts the amount of the deacidification solution to be sprayed according to the concentration value. A chimney 38 is provided at the rear end of the deacidification tower 37, and the flue gas is discharged to the outside through the chimney 38.

The waste pre-treatment portion is disposed in the first processing chamber 41, and the combustion furnace, the bag dust removal tower 34, the activated carbon adsorption tower 35, the induced draft fan 36, the deacidification tower 37, and the off-coupling control station 38 are disposed in the second processing chamber 42. Through the first processing chamber 41 and the second processing chamber 42, the garbage disposal system equipment can be concentrated and the footprint is small. The garbage disposal system further includes a control room 40 connected to each of the above-mentioned mechanical devices, and the above-mentioned various mechanical devices are automatically controlled by the control room 40 to realize fully automated garbage disposal, thereby effectively improving the garbage disposal efficiency.

The combustion furnace of the invention can fully decompose and decompose the garbage and the flue gas, and the negative pressure of the room is ventilated into the furnace body 17 by the blower 20, the first secondary fan 21 and the second secondary fan 22, and the induced draft fan 36 is opposite to the furnace body. 17 Negative pressure treatment causes a negative pressure inside the room, and the odor does not overflow. The odor is decomposed after being burnt at a high temperature of the furnace body, so that the garbage odor can be effectively controlled. The garbage disposal system has high integrity, complete functions, centralized equipment, easy disposal of waste, and greatly reduces the generation of dioxins, so that the final exhaust gas meets national emission standards.

The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to be limiting, and the present invention will be described in detail with reference to the preferred embodiments. It is intended that the scope of the invention should be construed as falling within the scope of the appended claims.

Claims

A combustion furnace for waste treatment, comprising: a furnace body, one side of the furnace body is provided with a fuel tank for supplying oil for combustion in the furnace body, and the bottom of the furnace body is provided with garbage for burning a grate, one side of the furnace body is provided with a blower, and the inside of the grate is ventilated, and a combustion chamber and a second combustion chamber are sequentially arranged above the grate, and the first secondary fan and the first a second secondary fan, wherein the first secondary fan is ventilated to the combustion chamber through a first air duct, and the second secondary fan is ventilated to the second combustion chamber through a second air duct, and the furnace body is further a leachate filter tank is disposed, the leachate filter tank is connected to the pump, and when the combustion temperature in the combustion chamber reaches a set value, the pump extracts the landfill leachate in the leachate filter tank to be sprayed to The combustion chamber is subjected to gasification treatment, and the flue gas combusted by the combustion chamber is burned at the second high temperature in the second combustion chamber, and the top of the furnace body is provided with a smoke exhaust pipe, and one side of the furnace body A slag remover is also provided for discharging the combustion slag.
The combustion furnace for garbage disposal according to claim 1, wherein the blower blows hot air of 100 ° C to 150 ° C to the grate to dry the garbage.
The combustion furnace for garbage disposal according to claim 1, wherein the first duct and the second duct are both connected to both sides of the furnace body, and the combustion is performed from both sides The chamber and the second combustion chamber are ventilated.
A combustion furnace for waste treatment according to claim 1, wherein a side of the furnace body is further provided with a hydraulic station for controlling the movement of the grate.
The combustion furnace for garbage disposal according to claim 1, wherein the combustion temperature of the garbage in the combustion chamber is 850 ° C - 1000 ° C, and when the temperature reaches a set high temperature of 930 ° C - 1000 ° C, the garbage seepage The filtrate is sprayed into the combustion chamber for gasification, and the combustion temperature of the flue gas in the secondary combustion chamber is greater than 850 °C.
A garbage disposal system, comprising: the waste treatment combustion furnace according to claim 1, wherein a front end of the combustion furnace is connected to a pre-treatment part of waste, and a rear end is connected to a flue gas treatment part, The processing portion includes a raw material pool for storing raw garbage, the raw material pool is connected to a scale machine capable of transporting garbage, and a rear end of the scale machine is provided with a bag breaking machine capable of breaking a large garbage bag, The rear end of the bag breaking machine is connected with a roller screen smashing machine for dispersing garbage, the rear end of the roller sieving machine is connected with a slanted belt conveyor, and the lower end of the belt conveyor is provided with a first collection a box for collecting irregular shape or heavy non-burnable garbage, a middle of the belt conveyor is provided with a magnetic separator for separating iron waste, and a bottom of the magnetic separator is provided with a second collection box. The higher end of the belt conveyor is provided with a crusher capable of crushing garbage, and the rear end of the crusher is connected to the screw extrusion dewatering machine through a first screw conveyor for squeezing and dewatering the crushed garbage. Screw extrusion dewatering machine a bottom of the spiral extrusion dewatering machine is connected to the temporary storage silo, and the temporary storage silo is connected to the combustion furnace through a third screw conveyor. The garbage enters the furnace body for combustion, and the combustion slag is discharged by the slag removing machine. A combustion chamber in the combustion furnace will also be sprayed with a four-effect denitration liquid to remove sulfur content in the flue gas, and the spray amount of the four-effect denitration liquid Automatically controlled by the denitration control station, the flue gas after combustion enters the flue gas treatment portion, the flue gas treatment portion includes a smoke exhaust pipe disposed at the top of the furnace body, and the exhaust pipe is sequentially connected to the first stage a heat exchanger and a second-stage heat exchanger, wherein the temperature of the flue gas in the first-stage heat exchanger and the second-stage heat exchanger is less than 200 ° C, and the end of the exhaust pipe is provided a bag dust removing device capable of removing particulate matter, wherein a rear end of the bag dust removing device is connected to an activated carbon adsorption device capable of adsorbing dioxins, a rear end of the activated carbon adsorption device is connected to an induced draft fan, and a rear end of the induced draft fan is connected to a deacidification device capable of removing acidic substances in flue gas, The rear end of the deacidification device is provided with a chimney for exhausting flue gas.
The garbage disposal system according to claim 6, wherein said roller sieving machine comprises a roller and a plurality of eccentric wheels disposed on said roller, said eccentric wheel when said roller rotates Tap the trash and jump forward to let the garbage spread out.
A garbage disposal system according to claim 6 wherein the belt conveyor has a belt moving direction that is perpendicular to the drum axis of the roller screen.
The garbage disposal system according to claim 6, wherein a side of the first stage heat exchanger or the second stage heat exchanger is provided with a cooling tower, and the cooling tower is connected to the water through a water pipe. a first stage heat exchanger and the second stage heat exchanger, wherein the water pipe is provided with a water pump, and the cooling water in the cooling tower is pumped into the first stage heat exchanger and the second stage heat exchanger Inside the device.
The garbage disposal system according to claim 6, wherein the acid removal monitoring point is disposed in the deacidification device, and the concentration of the acidic substance in the flue gas before deacidification is monitored in real time, and the information is fed back to the deacidification device. The deacidification device automatically adjusts the amount of the sprayed deacidification solution according to the concentration value.