Flue gas backflow equipment of household garbage incineration boiler

Abstract

The utility model relates to the technical field of environmental protection, and discloses household garbage incineration boiler smoke backflow equipment which comprises a box body, the top of the box body is fixedly connected with a smoke guide tower, a combustion chamber is formed in the box body, the right side of the top of the smoke guide tower is communicated with a smoke outlet pipe, and the right side of the smoke outlet pipe is fixedly connected with a backflow pipe. The bottom of the backflow pipe is fixedly connected with a heating chamber, the left side of the heating chamber communicates with a heating pipe, the outer wall of the heating pipe is fixedly connected with a heat absorption block, the outer wall of the heat absorption block is fixedly connected with a heat conduction piece, and the bottom of the heat conduction piece is fixedly connected with a backflow groove. In the utility model, garbage is put into the combustion chamber for combustion, the generated incomplete combustion gas is gathered at the top of the smoke guide tower, enters the return pipe through the smoke outlet pipe and is guided to the heating chamber, the heating pipe in the heating chamber is connected with the heat absorption block, the heat absorption block is positioned in the box body, and the heat conduction sheet is arranged to increase the heat exchange area, so that the reheating and sufficient combustion of the gas are realized.

Description

Technical Field

[0001] This utility model relates to the field of environmental protection technology, and in particular to a flue gas recirculation device for municipal solid waste incineration boilers. Background Technology

[0002] With increasing global environmental awareness, the requirements for controlling pollutants generated during municipal solid waste incineration are becoming increasingly stringent. Waste incineration produces a large amount of harmful gases, and traditional flue gas treatment methods face challenges in dealing with these complex combinations of pollutants. Dioxins are highly toxic organic pollutants that are easily generated under low-temperature and appropriate catalytic conditions. To effectively control dioxin formation, the combustion process needs to be optimized, leading to the development of flue gas recirculation technology. Municipal solid waste has a complex composition with significant differences in calorific value and combustion characteristics. Direct combustion may lead to incomplete combustion and the production of incomplete combustion products. When the waste has a high water content or contains some difficult-to-burn substances, the combustion process is prone to instability. Flue gas recirculation can reintroduce some high-temperature flue gas into the combustion zone, increasing the combustion temperature and oxygen mixing, thereby improving combustion efficiency.

[0003] Common flue gas treatment methods such as activated carbon adsorption, bag filter dust collection, and wet desulfurization and denitrification mainly focus on end-of-pipe treatment of pollutants that have already been generated. Although these methods can reduce pollutant emissions to a certain extent, they are not effective for some complex pollutant formation mechanisms. Flue gas recirculation equipment can reduce the generation of pollutants at the source by changing the combustion conditions during the combustion process. By recirculating the flue gas, the temperature of local high-temperature areas during combustion can be reduced, thereby reducing the generation of thermal nitrogen oxides, which is difficult to achieve with traditional flue gas treatment technologies. Utility Model Content

[0004] To overcome the above deficiencies, this utility model provides a flue gas recirculation device for municipal solid waste incineration boilers, which aims to improve the problem of incomplete combustion in the prior art.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a flue gas recirculation device for a municipal solid waste incineration boiler, comprising a housing, a flue gas tower fixedly connected to the top of the housing, a combustion chamber opened inside the housing, a flue gas outlet pipe connected to the top right side of the flue gas tower, a recirculation pipe fixedly connected to the right side of the flue gas outlet pipe, a heating chamber fixedly connected to the bottom of the recirculation pipe, a heating pipe connected to the left side of the heating chamber, a heat-absorbing block fixedly connected to the outer wall of the heating pipe, a heat-conducting plate fixedly connected to the outer wall of the heat-absorbing block, a recirculation groove fixedly connected to the bottom of the heat-conducting plate, and a processing mechanism fixedly connected to the top of the heating chamber, the processing mechanism being used for purifying the flue gas.

[0006] As a further description of the above technical solution:

[0007] The processing mechanism includes a flue gas return pipe, a heating chamber is fixedly connected to the bottom of the flue gas return pipe, a flue gas inlet pipe is connected to the right side of the flue gas return pipe, a reaction vessel is fixedly connected to the right side of the flue gas inlet pipe, a connecting pipe is connected to the bottom of the outer wall of the reaction vessel, a motor is fixedly connected to the top of the flue gas return pipe, a drive shaft is rotatably connected to the output end of the motor, and a fan is fixedly connected to the outer wall of the drive shaft.

[0008] As a further description of the above technical solution:

[0009] A dustproof net is fixedly connected to the top of the inner wall of the flue, and a support frame is fixedly connected to the top of the motor.

[0010] As a further description of the above technical solution:

[0011] A feed pipe is connected to the right side of the outer wall of the reaction vessel, and a flue pipe is fixedly connected to the top of the reaction vessel.

[0012] As a further description of the above technical solution:

[0013] A diversion pipe is fixedly connected to the left side of the feed pipe, and a nozzle is fixedly connected to the bottom of the diversion pipe.

[0014] As a further description of the above technical solution:

[0015] A support block is fixedly connected to the top of the exhaust pipe, and a rain shield is fixedly connected to the top of the support block.

[0016] As a further description of the above technical solution:

[0017] A rotating shaft is fixedly connected to the left side of the box, and a baffle is rotatably connected to the outer wall of the rotating shaft.

[0018] As a further description of the above technical solution:

[0019] A display screen is fixedly connected to the front side of the outer wall of the enclosure, and a temperature column is fixedly connected to the front edge of the enclosure.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, the garbage is put into the combustion chamber for combustion. The incompletely combusted gas generated accumulates at the top of the smoke guide tower, enters the return pipe through the smoke outlet pipe, and is then guided to the heating chamber. The heating chamber has a heating pipe connected to a heat absorption block. The heat absorption block is located in the box and has heat-conducting fins to increase the heat exchange area, so as to realize the reheating and complete combustion of the gas. A return trough is provided at the bottom to collect the waste.

[0022] 2. In this utility model, after the gas is burned in the heating chamber, it enters the reaction tank through the connecting pipe. The feed pipe and the diversion pipe introduce the reaction material, which is sprayed into the reaction tank through the nozzle at the bottom of the diversion pipe and mixed with the waste gas. After desulfurization, the waste gas is discharged through the exhaust pipe. A small amount of gas enters the inlet pipe and the return pipe. The motor is started, and after mixing with the external gas, it enters the heating chamber again to react with the waste gas. Attached Figure Description

[0023] Figure 1 This is a front perspective view of the flue gas recirculation device for a municipal solid waste incineration boiler proposed in this utility model.

[0024] Figure 2 This is a partial structural exploded view of the flue gas recirculation device for municipal solid waste incineration boilers proposed in this utility model;

[0025] Figure 3 This is a partial structural diagram of the flue gas recirculation device for municipal solid waste incineration boilers proposed in this utility model;

[0026] Figure 4 This is a partial structural diagram of the flue gas recirculation device for municipal solid waste incineration boilers proposed in this utility model;

[0027] Figure 5 This is a partial structural schematic diagram of the flue gas recirculation device for municipal solid waste incineration boilers proposed in this utility model.

[0028] Legend:

[0029] 1. Housing; 2. Processing mechanism; 201. Return smoke pipe; 202. Inlet smoke pipe; 203. Reactor; 204. Connecting pipe; 205. Motor; 206. Drive shaft; 207. Fan; 208. Dustproof net; 209. Support frame; 210. Feed pipe; 211. Diverter pipe; 212. Nozzle; 213. Exhaust pipe; 214. Support block; 215. Rain baffle; 3. Smoke guide tower; 4. Combustion chamber; 5. Exhaust smoke pipe; 6. Return pipe; 7. Heating chamber; 8. Heating tube; 9. Heat absorber block; 10. Heat conducting plate; 11. Return trough; 12. Rotating shaft; 13. Baffle; 14. Display screen; 15. Temperature column. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Please see the appendix Figure 1 - Appendix Figure 3This utility model provides an embodiment of a flue gas recirculation device for a municipal solid waste incineration boiler, comprising a housing 1, a flue gas guide tower 3 fixedly connected to the top of the housing 1, a combustion chamber 4 inside the housing 1, a flue gas outlet pipe 5 connected to the top right side of the flue gas guide tower 3, a recirculation pipe 6 fixedly connected to the right side of the flue gas outlet pipe 5, a heating chamber 7 fixedly connected to the bottom of the recirculation pipe 6, a heating pipe 8 connected to the left side of the heating chamber 7, a heat absorption block 9 fixedly connected to the outer wall of the heating pipe 8, a heat-conducting plate 10 fixedly connected to the outer wall of the heat absorption block 9, a recirculation groove 11 fixedly connected to the bottom of the heat-conducting plate 10, a processing mechanism 2 fixedly connected to the top of the heating chamber 7, the processing mechanism 2 being used for purifying the flue gas, and a flue gas guide tower 3 fixedly connected to the top of the housing 1 to guide the direction of the smoke, in order to ensure... To ensure the smooth discharge of smoke, a smoke outlet pipe 5 is connected to the top right side of the smoke tower 3, allowing smoke to be discharged from the smoke tower 3. A return pipe 6 is fixedly connected to the right side of the smoke outlet pipe 5. The function of the return pipe 6 is to guide some of the smoke back into the housing 1 to achieve smoke recycling. A heating chamber 7 is fixedly connected to the bottom of the return pipe 6. A heating pipe 8 is connected to the left side of the heating chamber 7. A heat absorption block 9 is fixedly connected to the outer wall of the heating pipe 8. The heat absorption block 9 can effectively absorb heat. In order to further improve the thermal efficiency, a heat conduction plate 10 is also fixedly connected to the outer wall of the heat absorption block 9. The heat conduction plate 10 can evenly transfer the heat absorbed by the heat absorption block 9 to other parts. Finally, a return groove 11 is fixedly connected to the bottom of the heat conduction plate 10. The function of the return groove 11 is to collect and guide the heat flow.

[0032] Specifically, the top of the housing 1 is equipped with a smoke guide tower 3 to guide the flow of smoke. To ensure smooth smoke exhaust, a smoke outlet pipe 5 is provided on the right side of the top of the smoke guide tower 3, allowing the smoke to be discharged from the smoke guide tower 3. The right side of the smoke outlet pipe 5 is connected to a return pipe 6. The function of the return pipe 6 is to send part of the smoke back to the housing 1 to realize the recycling of smoke. The bottom of the return pipe 6 is connected to the heating chamber 7. A heating pipe 8 is provided on the left side of the heating chamber 7. The heating pipe 8 is connected to the heat absorption block 9 through the outer wall. The heat absorption block 9 can efficiently absorb heat. In order to improve thermal efficiency, the outer wall of the heat absorption block 9 is also connected to a heat conduction plate 10. The heat conduction plate 10 can evenly transfer heat. Finally, the bottom of the heat conduction plate 10 is connected to a return groove 11. The return groove 11 is used to collect and guide the heat flow.

[0033] Please see the appendix Figure 2 - Appendix Figure 3The processing mechanism 2 includes a flue gas return pipe 201, with a heating chamber 7 fixedly connected to its bottom. A flue gas inlet pipe 202 connects to the right side of the flue gas return pipe 201, and a reaction vessel 203 is fixedly connected to the right side of the flue gas inlet pipe 202. A connecting pipe 204 connects to the bottom of the outer wall of the reaction vessel 203. A motor 205 is fixedly connected to the top of the flue gas return pipe 201, and a drive shaft 206 is rotatably connected to the output end of the motor 205. A fan 207 is fixedly connected to the outer wall of the drive shaft 206. The bottom of the flue gas return pipe 201 is fixedly connected to the heating chamber 7, ensuring that the flue gas can flow smoothly. The flue gas smoothly enters the heating zone. The right side of the flue gas return pipe 201 is connected to the flue gas inlet pipe 202, allowing the flue gas to be smoothly transferred from the flue gas return pipe 201 to the flue gas inlet pipe 202. The right side of the flue gas inlet pipe 202 is fixedly connected to the reaction vessel 203. This reaction vessel 203 is the key part of the entire system for carrying out chemical reactions. The bottom of the outer wall of the reaction vessel 203 is connected to the connecting pipe 204. In order to drive the operation of the entire system, the top of the flue gas return pipe 201 is fixedly connected to the motor 205. The motor 205 serves as a power source, and its output end is rotatably connected to the drive shaft 206. The outer wall of the drive shaft 206 is fixedly connected to the fan 207.

[0034] Specifically, the bottom return flue pipe 201 is securely connected to the heating chamber 7, ensuring that the flue gas can flow into the heating zone without obstruction. The right side of the return flue pipe 201 is connected to the inlet flue pipe 202, realizing the smooth transfer of flue gas from the return flue pipe 201 to the inlet flue pipe 202. The right side of the inlet flue pipe 202 is fixedly connected to the reaction vessel 203. The bottom outer side of the reaction vessel 203 is connected to the connecting pipe 204. In order to drive the system operation, a motor 205 is installed at the top of the return flue pipe 201. The motor 205 serves as a power source, and its output end is rotatably connected to the drive shaft 206. A fan 207 is fixedly installed on the outer side of the drive shaft 206.

[0035] Please see the appendix Figure 2 - Appendix Figure 4A dustproof net 208 is fixedly connected to the top of the inner wall of the return smoke pipe 201. A support frame 209 is fixedly connected to the top of the motor 205. A display screen 14 is fixedly connected to the front side of the outer wall of the housing 1. A temperature column 15 is fixedly connected to the front edge of the housing 1. A support block 214 is fixedly connected to the top of the exhaust pipe 213. A rain shield 215 is fixedly connected to the top of the support block 214. A dustproof net 208 is fixedly connected to the top of the inner wall of the return smoke pipe 201 to prevent dust from entering the motor 205. A support frame 209 is fixedly connected to the top of the motor 205. The function of the support frame 209 is to support the motor 205 and ensure its stable operation. In addition, a display screen 14 is fixedly connected to the front side of the outer wall of the housing 1. This display screen 14 can display the operating status of the equipment in real time. A temperature column 15 is also fixedly connected to the front edge of the housing 1. This temperature column 15 can monitor the temperature of the equipment in real time and prevent the equipment from overheating. A support block 214 is fixedly connected to the top of the exhaust pipe 213. The function of this support block 214 is to support the exhaust pipe 213 and ensure its stable operation. Finally, a rain shield 215 is fixedly connected to the top of the support block 214.

[0036] Specifically, a dustproof net 208 is installed on the upper inner wall of the return smoke pipe 201 to prevent dust from entering the motor 205. A support frame 209 is installed on the upper end of the motor 205 to support the motor 205 and ensure its stable operation. In addition, a display screen 14 is installed on the front of the outer wall of the housing 1 to display the operating status of the equipment in real time. A temperature column 15 is also installed on the front edge of the housing 1 to monitor the equipment temperature in real time and prevent the equipment from overheating. A support block 214 is installed on the upper end of the exhaust pipe 213 to support the exhaust pipe 213 and ensure its stable operation. Finally, a rain shield 215 is installed on the upper end of the support block 214.

[0037] Please see the appendix Figure 3 - Appendix Figure 5The reaction vessel 203 has a feed pipe 210 connected to the right side of its outer wall. A smoke exhaust pipe 213 is fixedly connected to the top of the reaction vessel 203. A diversion pipe 211 is fixedly connected to the left side of the feed pipe 210. A nozzle 212 is fixedly connected to the bottom of the diversion pipe 211. A rotating shaft 12 is fixedly connected to the left side of the housing 1. A baffle 13 is rotatably connected to the outer wall of the rotating shaft 12. The right side of the outer wall of the reaction vessel 203 is connected to an external system via a feed pipe 210, ensuring the smooth input of the reactants. A smoke exhaust pipe 213 is fixedly connected to the top of the reaction vessel 203. A diversion pipe 211 is further fixedly connected to the left side of the feed pipe 210. A nozzle 212 is fixedly connected to the bottom of the diversion pipe 211. The nozzle 212 is responsible for evenly spraying the material into the interior of the reaction vessel 203, ensuring the full progress of the reaction. Additionally, a rotating shaft 12 is fixedly connected to the left side of the housing 1, and a baffle 13 is rotatably connected to the outer wall of the rotating shaft 12.

[0038] Specifically, the right outer wall of the reaction vessel 203 is connected to an external system via a feed pipe 210, ensuring smooth material input. The top of the vessel is equipped with a smoke exhaust pipe 213, while the left side of the feed pipe 210 is connected to a distribution pipe 211. Below the distribution pipe 211 is a nozzle 212, which is responsible for evenly spraying the material into the reaction vessel 203 to ensure a thorough reaction. In addition, a rotating shaft 12 is installed on the left side of the housing 1, and a baffle 13 is rotatably connected to its outer wall.

[0039] Working principle: The garbage is put into the combustion chamber 4 and ignited. The incompletely combusted gas produced after combustion will accumulate in the smoke tower 3 and gather at the top. Then, the gas enters the return pipe 6 through the smoke outlet pipe 5. Under the guidance of the return pipe 6, the gas enters the heating chamber 7. The heating chamber 7 is equipped with heating pipes 8, which are connected to heat absorption blocks 9. Since the heat absorption blocks 9 are located inside the box 1, and the outer wall of the heat absorption blocks 9 has heat-conducting plates 10 to increase the heat exchange area, the gas in the heating chamber 7 is reheated to achieve complete combustion. The bottom is also equipped with a return trough 11 for waste collection.

[0040] After the gas is fully combusted inside the heating chamber 7, it enters the reaction tank 203 through the connecting pipe 204. The reactant is fed through the feed pipe 210 and the feed pipe 210 is fed into the diversion pipe 211. The gas is then discharged from the nozzle 212 at the bottom of the diversion pipe 211 into the reaction tank 203, where it mixes with the exhaust gas and reacts. After desulfurization is completed, the gas is discharged through the exhaust pipe 213. A small amount of gas is fed into the flue pipe 202 and then into the return flue pipe 201. The motor 205 is turned on to mix the gas with the outside gas and then into the heating chamber 7, where it reacts with the exhaust gas inside the chamber again.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A waste incineration boiler flue gas recirculation apparatus comprising a housing (1), characterised in that: The top of the box (1) is fixedly connected with a smoke guide tower (3), the inside of the box (1) is provided with a combustion chamber (4), the top right side of the smoke guide tower (3) is communicated with a smoke outlet pipe (5), the right side of the smoke outlet pipe (5) is fixedly connected with a reflux pipe (6), the bottom of the reflux pipe (6) is fixedly connected with a heating chamber (7), the left side of the heating chamber (7) is communicated with a heating pipe (8), the outer wall of the heating pipe (8) is fixedly connected with a heat absorbing block (9), the outer wall of the heat absorbing block (9) is fixedly connected with a heat conducting fin (10), the bottom of the heat conducting fin (10) is fixedly connected with a reflux groove (11), the top of the heating chamber (7) is fixedly connected with a treatment mechanism (2), and the treatment mechanism (2) is used for purifying flue gas.

2. The household waste incineration boiler flue gas recirculation apparatus according to claim 1, characterized in that: The treatment mechanism (2) comprises a smoke return pipe (201), the bottom of the smoke return pipe (201) is fixedly connected with a heating chamber (7), the right side of the smoke return pipe (201) is communicated with a smoke guide pipe (202), the right side of the smoke guide pipe (202) is fixedly connected with a reaction tank (203), the outer wall bottom of the reaction tank (203) is communicated with a connecting pipe (204), the top of the smoke return pipe (201) is fixedly connected with a motor (205), the output end of the motor (205) is rotatably connected with a drive shaft (206), and the outer wall of the drive shaft (206) is fixedly connected with a fan (207).

3. The household waste incineration boiler flue gas recirculation apparatus according to claim 2, characterized in that: The inner wall top of the smoke return pipe (201) is fixedly connected with a dustproof net (208), and the top of the motor (205) is fixedly connected with a support frame (209).

4. The household waste incineration boiler flue gas recirculation apparatus according to claim 2, characterized by: The outer wall right side of the reaction tank (203) is communicated with a feeding pipe (210), and the top of the reaction tank (203) is fixedly connected with a smoke exhaust pipe (213).

5. The household waste incineration boiler flue gas recirculation apparatus according to claim 4, characterized in that: The left side of the feeding pipe (210) is fixedly connected with a shunt pipe (211), and the bottom of the shunt pipe (211) is fixedly connected with a spray head (212).

6. The household waste incineration boiler flue gas recirculation apparatus according to claim 4, characterized by: The top of the smoke exhaust pipe (213) is fixedly connected with a supporting block (214), and the top of the supporting block (214) is fixedly connected with a rain shield (215).

7. The household waste incineration boiler flue gas recirculation apparatus according to claim 1, characterized by: The left side of the box (1) is fixedly connected with a rotating shaft (12), and the outer wall of the rotating shaft (12) is rotatably connected with a baffle (13).

8. The household waste incineration boiler flue gas recirculation apparatus according to claim 1, characterized by: The front side of the outer wall of the box (1) is fixedly connected with a display screen (14), and the front side edge of the box (1) is fixedly connected with a temperature column (15).

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