Gasification furnace gas dust filtering and diffusing device
By combining bag filters, gas venting components, and automatic dust removal components, the problems of dust pollution and safety hazards in the gas venting of pulverized coal gasifiers have been solved, achieving safe and efficient dust filtration and venting, and improving the flexibility and safety of production.
Patent Information
- Application Number
- CN202422756311.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-12
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2034-11-12
AI Technical Summary
When pulverized coal gasifiers release coal gas, the gas contains a large amount of dust, which leads to environmental pollution and safety hazards. Furthermore, it is impossible to release and depressurize quickly and effectively under abnormal conditions, affecting production safety and flexibility.
The system employs a bag filter, a gas venting assembly, and an automatic dust removal assembly. The bag filter removes dust, the gas venting assembly ignites toxic and flammable gases, and the automatic dust removal assembly cleans up the dust, thus achieving dust filtration and safe venting.
It effectively removes dust, reduces environmental pollution and safety hazards, ensures safety on the production site, and improves the production flexibility and safety of pulverized coal gasification furnaces.
Smart Images
Figure CN223633317U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to coal gas purification dust removal technical field, concretely is a gasification furnace coal gas dust filter diffusion device. BACKGROUND
[0002] The pulverized coal gasification furnace is a device for converting pulverized coal into synthesis gas (main component is hydrogen and carbon monoxide). It uses pulverized coal as raw material, makes it react with oxygen or steam under high temperature and high pressure, thereby producing high-temperature coal gas. At this time, the coal gas carries a large amount of unburned pulverized coal particles, which need to be sent into the post-production system equipment for cooling and dust removal under normal production conditions.
[0003] During the initial operation and shutdown of the gasification furnace equipment, the pulverized coal gasification furnace needs to diffuse this part of excess gas and unqualified gas. In the daily operation process, if abnormal conditions occur, the pulverized coal gasification furnace also needs to be diffused and pressure released in emergency to ensure the safety of the entire production system. However, this part of the coal gas contains a large amount of dust, which will float to the production site after being diffused, seriously polluting the surrounding environment. Influenced by environmental protection control, the shutdown time of the pulverized coal gasification furnace will be greatly restricted. In the face of abnormal conditions, it is also difficult to diffuse and release pressure at any time, which is not conducive to on-site safety control.
[0004] Therefore, how to quickly and effectively treat the coal gas temporarily diffused from the pulverized coal gasification furnace to meet the safety production needs of the pulverized coal gasification furnace is a problem that needs to be solved. INVENTION CONTENTS
[0005] In order to overcome the problems in the related art, the utility model provides a gasification furnace coal gas dust filter diffusion device for collecting and treating the coal gas temporarily diffused from the pulverized coal gasification furnace, so that the pulverized coal gasification furnace can be shut down according to production needs, and the coal gas can be diffused and pressure released in emergency, improving the flexibility and safety of the pulverized coal gasification furnace production.
[0006] The technical scheme adopted by the utility model is: a gasification furnace coal gas dust filter diffusion device, comprising
[0007] The bag-type dust collector is provided with a first ash outlet, a first inlet and a first outlet, the first inlet is used for communicating with the gasification furnace;
[0008] The coal gas diffusion assembly communicates with the first outlet;
[0009] And an automatic ash cleaning assembly, the automatic ash cleaning assembly comprises a backflushing component and an ash conveying component, the backflushing component is arranged at the first outlet, and the ash conveying component is arranged at the first ash outlet.
[0010] Further, the first inlet is communicated with the gasification furnace through a first coal gas release pipeline, and the first coal gas release pipeline is provided with a cut-off valve and a check valve.
[0011] Further, the cloth bag dust collector comprises a shell and a dust return hopper, the dust return hopper is arranged at the bottom of the shell and communicated with the shell, the first ash outlet is arranged at the bottom of the dust return hopper, and the first inlet and the first outlet are arranged on the shell.
[0012] Further, a flower plate is arranged in the shell and close to the top, the shell is divided into an upper shell and a lower shell by the flower plate, the first outlet comprises a first gas outlet and a first blowback gas outlet, the first blowback gas outlet is arranged on the upper shell, and the first inlet and the first gas outlet are arranged on opposite sides of the lower shell.
[0013] Further, the flower plate is vertically provided with a flow distribution plate close to one side of the first inlet, and a plurality of filter bags are vertically arranged on the other side of the flower plate.
[0014] Further, the ash conveying component comprises an intermediate ash tank, a pneumatic ash conveying device and an ash bin, the intermediate ash tank is communicated with the first ash outlet through an ash discharge valve, the pneumatic ash conveying device comprises a bin pump, a conveying pipeline and a fan, and the intermediate ash tank is communicated with the ash bin through the conveying pipeline.
[0015] Further, the blowback component comprises a nitrogen source, a heating device and a blowback gas bag, the gas outlet of the nitrogen source is communicated with the gas inlet of the heating device, the gas outlet of the heating device is communicated with the gas inlet of the blowback gas bag, and the gas outlet of the blowback gas bag is communicated with the first blowback gas outlet.
[0016] Further, the coal gas release assembly comprises a torch and an igniter, the torch is provided with a combustible gas passage, the combustible gas passage comprises a first combustible gas outlet and a first combustible gas inlet, the first combustible gas outlet is arranged at the head of the torch, the igniter is arranged at the first combustible gas outlet, and the first combustible gas inlet is used for being communicated with the first gas outlet.
[0017] Further, the first combustible gas inlet is communicated with the first gas outlet through a second coal gas release pipeline, and the second coal gas release pipeline is provided with a check valve.
[0018] The gasification furnace coal gas dust filtering and diffusing device has the following technical effects: the bag-type dust collector is arranged, dust in the coal gas diffused from the gasification furnace is treated, a large amount of dust is prevented from floating in the production site after the unqualified coal gas is diffused, and the surrounding environment is prevented from being polluted.
[0019] Other features and advantages of the present application will be described in detail in the following specific implementation mode part. BRIEF DESCRIPTION OF DRAWINGS
[0020] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, and are used together with the following specific implementation mode to explain the present application, but do not constitute a limitation on the present application. In the drawings:
[0021] Figure 1 It is a whole block diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment (I).
[0022] Figure 2 It is a whole block diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment (II).
[0023] Figure 3 It is a bag-type dust collector structure diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment.
[0024] Fig. 1 is a whole block diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment (I); Fig. 2 is a whole block diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment (II); Fig. 3 is a bag-type dust collector structure diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 4 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 5 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 6 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 7 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 8 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 9 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 10 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 11 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 12 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 13 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 14 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 15 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 16 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 17 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 18 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 19 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 20 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 21 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 22 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 23 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 24 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 25 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 26 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 27 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 28 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 29 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 30 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 31 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 32 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 33 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 34 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 35 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 36 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 37 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 38 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 39 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 40 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 41 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 42 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 43 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 44 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 45 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 46 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 47 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 48 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 49 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 50 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 51 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 52 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 53 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 54 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 55 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 56 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 57 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 58 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 59 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 60 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 61 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 62 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 63 is a schematic diagram of a gasification furnace coal gas dust filtering and diffusing device according to an exemplary embodiment; Fig. 64 is a schematic diagram of a gasification furnace coal gas dust filtering and Detailed Implementation
[0025] The specific embodiments disclosed herein will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this disclosure.
[0026] like Figure 1 , Figure 2 The image shows a disclosed exemplary embodiment of the present invention. The gasifier gas dust filtration and venting device 100 of the present invention includes a bag filter 200, a gas venting component 300, and an automatic dust removal component 400. The bag filter 200 has a first ash outlet 203, a first inlet 201, and a first outlet 202. The first inlet 201 is used to communicate with the gasifier 500. The gas venting component 300 is connected to the first outlet 202. The automatic dust removal component 400 includes a back-blowing component 402 and an ash conveying component 401. The back-blowing component 402 is located at the first outlet 202, and the ash conveying component 401 is located at the first ash outlet 203.
[0027] During the initial commissioning of the gasifier 500, shutdown periods, and temporary emergencies during daily operation, excess substandard gas needs to be released externally. This gas contains a large amount of dust, and its main component is carbon monoxide, a toxic gas. If this gas is released directly, a large amount of dust will drift into the production site, polluting the surrounding environment. The toxic and flammable gas also increases safety hazards at the production site. Therefore, the shutdown time of the gasifier 500 is significantly restricted, and in the event of abnormal situations, it is not possible to release pressure and release gas at any time, which is detrimental to overall on-site safety management.
[0028] This utility model relates to a gasifier gas dust filtration and venting device 100, comprising a bag filter 200, a gas venting assembly 300, and an automatic dust removal assembly 400. The first inlet 201 of the bag filter 200 is connected to the gasifier 500 and is used to collect substandard gas temporarily vented from the gasifier 500, treating the gas for dust removal to prevent dust pollution after gas venting. The dust-treated gas enters the gas venting assembly 300, igniting toxic and flammable gases in the gas, preventing workers at the production site from inhaling large amounts of harmful gases, thus protecting their health and reducing fire safety hazards. The automatic dust removal assembly 400 cleans the dust accumulated in the bag filter 200 to ensure that the bag filter 200 is in good working condition. The gasifier gas dust filtration and venting device 100 enables the pulverized coal gasifier 500 to be shut down as needed for production, and to release gas pressure in an emergency, thereby improving the flexibility and safety of the pulverized coal gasifier 500.
[0029] Specifically, the first inlet 201 is communicated with the gasifier 500 through the first coal gas releasing pipeline 204, and the first coal gas releasing pipeline 204 is provided with a cut-off valve and a check valve. When the gasifier 500 needs to release coal gas, other valves on the gasifier 500 are closed, the cut-off valve on the first coal gas releasing pipeline 204 is opened, and the excess unqualified coal gas enters the dust collector through the first coal gas releasing pipeline 204. The check valve on the first coal gas releasing pipeline 204 can prevent the coal gas from flowing back into the gasifier 500.
[0030] For example, as shown in Figure 3 , the bag-type dust collector 200 includes a shell 601 and a dust return hopper 602, the dust return hopper 602 is arranged at the bottom of the shell 601 and is communicated with the shell 601, the first ash outlet 203 is arranged at the bottom of the dust return hopper 602, and the first inlet 201 and the first outlet 202 are arranged on the shell 601.
[0031] Specifically, the shell 601 is provided with a flower plate 209 near the top, and the shell 601 is divided into an upper shell 6011 and a lower shell 6012 by the flower plate 209. The first outlet 202 includes a first gas outlet 2021 and a first blowback gas outlet 2022, the first blowback gas outlet 2022 is arranged on the upper shell 6011, and the first inlet 201 and the first gas outlet 2021 are arranged on the opposite sides of the lower shell 6012. The flower plate 209 is vertically provided with a flow-distributing plate 207 near the side close to the first inlet 201, and the other side of the flower plate 209 is vertically provided with a plurality of filter bags 208.
[0032] When the gasifier 500 releases, the coal gas enters the bag-type dust collector 200 through the first inlet 201. Generally, the flow rate of the coal gas is fast, the impact force on the filter bags 208 is large, the service life of the filter bags 208 is reduced, and the contact time of the filter bags 208 with the gas flow is short, so that the dust in the coal gas flow cannot be fully removed. Therefore, the flow-distributing plate 207 is vertically arranged at the position of the flower plate 209 corresponding to the first inlet 201, and the length direction of the flow-distributing plate 207 is perpendicular to the entering direction of the coal gas of the first inlet 201. After being evenly distributed by the flow-distributing plate 207, the coal gas uniformly reaches the filter bags 208. When the coal gas passes through the filter bags 208, the solid dust particles are captured on the outside of the filter bags 208, and the cleaned gas is discharged through the first gas outlet 2021. The dust captured by the filter bags 208 falls into the dust return hopper 602 under the action of gravity, and the dust accumulated on the filter bags 208 can be stripped off by using the blowback component 402.
[0033] For example, as shown in Figure 1 , Figure 2As shown, in the exemplary embodiment of the utility model discloses, backflush component 402 includes nitrogen source 4021, heating device 4022 and backflush gas bag 4023, and the gas outlet of nitrogen source 4021 is communicated with the gas inlet of heating device 4022, and the gas outlet of heating device 4022 is communicated with the gas inlet of backflush gas bag 4023, and the gas outlet of backflush gas bag 4023 is communicated with first backflush gas port 2022.
[0034] The flower plate 209 is arranged on the inner side of the shell 601 close to the top, and the shell 601 is divided into an upper shell 6011 and a lower shell 6012 by the flower plate 209. The first inlet 201 and the first gas outlet 2021 are located on opposite sides of the lower shell 6012. In the lower shell 6012, the uniform flow distribution plate 207 and the filter bag 208 are vertically installed on the flower plate 209. On the flower plate 209, a flow guide hole is formed at a position corresponding to each filter bag 208. The upper shell 6011 is provided with a first backflush gas port 2022, which is in communication with the gas outlet of the backflush gas bag 4023. When too much dust accumulates on the filter bag 208 and cannot naturally fall by its own gravity, the backflush component 402 is activated. The backflush component 402 includes a nitrogen source 4021, a heating device 4022 and a backflush gas bag 4023. Nitrogen gas enters the backflush gas bag 4023 after being heated by the heating device 4022. The backflush gas bag 4023 compresses the nitrogen gas. When the backflush component 402 is activated, the stored compressed nitrogen gas is rapidly released, forming a strong gas flow. The nitrogen gas flow enters the upper shell 6011 through the first backflush gas port 2022, and is blown through the flow guide holes on the flower plate 209 to the filter bag 208, causing the filter bag 208 to rapidly expand and shake off the surface dust. The dust falls into the dust return hopper 602 and gradually accumulates in the dust return hopper 602. When the accumulation reaches a certain level, the dust in the dust return hopper 602 needs to be cleaned.
[0035] For example, as Figure 1 , Figure 2As shown in the exemplary embodiments disclosed in the utility model, the ash conveying component 401 comprises an intermediate ash tank 4011, a pneumatic ash conveying device and an ash bin 4012, the intermediate ash tank 4011 is communicated with the first ash outlet 203 through the ash discharge valve 206, the pneumatic ash conveying device comprises a bin pump 4013, a conveying pipeline 4015 and a fan 4014, the intermediate ash tank 4011 is communicated with the ash bin 4012 through the conveying pipeline 4015. The ash discharge valve 206 is arranged at the first ash outlet 203. When the ash discharge valve 206 is opened, the dust in the dust return hopper 602 falls into the intermediate ash tank 4011. The dust in the intermediate ash tank 4011 is conveyed into the bin pump 4013 under the conveying of the conveying shaft of the bin pump 4013. When the dust in the bin pump 4013 reaches the preset material level, the conveying shaft of the bin pump 4013 stops conveying, and the feeding valve is closed. The fan 4014 introduces compressed air into the bin pump 4013 to fluidize the dust, and the fluidized dust enters the ash bin 4012 through the conveying pipeline 4015.
[0036] For example, as Figure 2 As shown in the exemplary embodiments disclosed in the utility model, the coal gas diffusion assembly 300 comprises a torch 301 and an igniter 302, the torch 301 is internally provided with a combustible gas passage, the combustible gas passage comprises a first combustible gas outlet and a first combustible gas inlet, the first combustible gas outlet is arranged at the head of the torch 301, the igniter 302 is arranged at the first combustible gas outlet, and the first combustible gas inlet is used for being communicated with the first gas outlet 2021. Specifically, the first combustible gas inlet is communicated with the first gas outlet 2021 through the second coal gas diffusion pipeline 205, and the second coal gas diffusion pipeline 205 is provided with a check valve.
[0037] The check valve is arranged on the second coal gas diffusion pipeline 205, so that the coal gas entering the torch 301 for burning is prevented from flowing back to the dust remover, and a safety hazard is avoided. The torch 301 is internally provided with a combustible gas passage, the combustible gas passage is provided with a first combustible gas outlet, and the igniter 302 is arranged at the first combustible gas outlet, so as to ignite the coal gas. In this way, the content of combustible gas around the production site can be effectively reduced, fire hazards can be avoided, meanwhile, workers will not inhale toxic gas, and the health is not harmed.
[0038] The gasifier coal gas dust filtering diffusion device 100 is installed on the coal gas diffusion pipeline of the gasifier 500, so that the purpose of removing dust in the coal gas is achieved, meanwhile, the dust is recycled, environmental protection problems involved in the coal gas diffusion process in the production process of the gasifier 500 are avoided, the labor intensity of post personnel is reduced, meanwhile, fire hazards and health hazards possibly caused by direct diffusion of the coal gas are eliminated, the safe and continuous operation of the gasifier 500 is effectively ensured, and greater economic benefits are brought to the production enterprises.
[0039] The preferred embodiments of the present disclosure are described in detail above with reference to the drawings, but the present disclosure is not limited to the specific details in the above-described embodiments. Various simple modifications can be made to the technical solutions of the present disclosure within the technical concept of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
[0040] In addition, it should be noted that each specific technical feature described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, various possible combinations are not described again in the present disclosure.
[0041] In addition, various different embodiments of the present disclosure can also be combined in any manner as long as they do not deviate from the idea of the present disclosure, and they should also be considered as disclosed in the present disclosure.
Claims
1. A gasifier gas dust filtration and venting device, characterized in that: The application relates to a bag filter, which comprises a first dust outlet, a first inlet and a first outlet, the first inlet is used for being communicated with a gasification furnace; the first outlet comprises a first gas outlet and a first back-blowing gas outlet; a coal gas emission assembly is communicated with the first outlet; an automatic dust cleaning assembly, which comprises a back-blowing component and a dust conveying component, the back-blowing component is arranged at the first outlet, and the dust conveying component is arranged at the first dust outlet; the coal gas emission assembly comprises a torch and an igniter, a combustible gas passage is arranged in the torch, the combustible gas passage comprises a first combustible gas outlet and a first combustible gas inlet, the first combustible gas outlet is arranged at the head of the torch, the igniter is arranged at the first combustible gas outlet, and the first combustible gas inlet is used for being communicated with the first gas outlet; the first combustible gas inlet is communicated with the first gas outlet through a second coal gas emission pipeline, and the second coal gas emission pipeline is provided with a check valve. the first inlet is communicated with the gasification furnace through a first coal gas emission pipeline, and the first coal gas emission pipeline is provided with a cut-off valve and a check valve.
2. The gasifier coal gas dust filtering and releasing device according to claim 1, characterized in that, the bag filter comprises a shell and a dust return hopper, the dust return hopper is arranged at the bottom of the shell and is communicated with the shell, the first dust outlet is arranged at the bottom of the dust return hopper, and the first inlet and the first outlet are arranged on the shell.
3. The gasifier coal gas dust filtering and releasing device according to claim 1, characterized in that, a flower plate is arranged in the shell and close to the top, the shell is divided into an upper shell and a lower shell by the flower plate, the first back-blowing gas outlet is arranged on the upper shell, and the first inlet and the first gas outlet are arranged on the opposite sides of the lower shell.
4. The gasifier coal gas dust filtering and releasing device according to claim 3, characterized in that, a flow-distributing plate is vertically arranged on one side of the flower plate close to the first inlet, and a plurality of filter bags are vertically arranged on the other side of the flower plate.
5. The gasifier coal gas dust filtering and releasing device according to claim 4, characterized in that, the dust conveying component comprises an intermediate dust tank, a pneumatic dust conveying device and a dust bin, the intermediate dust tank is communicated with the first dust outlet through a dust discharging valve, the pneumatic dust conveying device comprises a bin pump, a conveying pipeline and a fan, and the intermediate dust tank is communicated with the dust bin through the conveying pipeline.
6. The gasifier coal gas dust filtering and releasing device according to claim 1, characterized in that, the back-blowing component comprises a nitrogen source, a heating device and a back-blowing gas bag, the gas outlet of the nitrogen source is communicated with the gas inlet of the heating device, the gas outlet of the heating device is communicated with the gas inlet of the back-blowing gas bag, and the gas outlet of the back-blowing gas bag is communicated with the first back-blowing gas outlet.
7. The gasifier coal gas dust filtering and releasing device according to claim 4, characterized in that,