CN217781071U

CN217781071U - Coupling gasification device

Info

Publication number: CN217781071U
Application number: CN202222342597.0U
Authority: CN
Inventors: 王国梁; 赵元琪; 李俊挺; 董先营; 陈其虎; 邱小庆; 曹文龙; 李红娣; 和浩波; 张文飞
Original assignee: National Energy Group Ningxia Coal Industry Co Ltd
Current assignee: National Energy Group Ningxia Coal Industry Co Ltd
Priority date: 2022-09-02
Filing date: 2022-09-02
Publication date: 2022-11-11
Anticipated expiration: 2032-09-02

Abstract

The utility model provides a coupling gasification equipment, including dry coal powder gasification system and coal slurry gasification system, dry coal powder gasification system includes dry coal powder gasifier, first synthetic gas pipeline and first waste water pipeline, coal slurry gasification system includes coal slurry preparation facilities, coal slurry gasifier and second synthetic gas pipeline, the input and the dry coal powder gasifier intercommunication of first synthetic gas pipeline, the output of first synthetic gas pipeline is used for and carbon monoxide conversion equipment intercommunication, the input and the dry coal powder gasifier intercommunication of first waste water pipeline, the output of first waste water pipeline and coal slurry preparation facilities's input intercommunication, coal slurry preparation facilities's output and gasifier intercommunication, prepare into the coal slurry with the waste water in buggy and the first waste water pipeline, the input and the coal slurry gasifier intercommunication of second synthetic gas pipeline, the output and the first synthetic gas pipeline intercommunication of second synthetic gas pipeline. The problem of high energy consumption when adjusting the hydrogen-carbon ratio in the synthesis gas is solved.

Description

Coupling gasification device

Technical Field

The utility model relates to a dry coal powder gasification technical field particularly, relates to a coupling gasification equipment.

Background

In the process of coal gasification, coal is used as a raw material, and organic substances in the coal and a gasifying agent are subjected to a series of chemical reactions at high temperature and high pressure in a specific gasification furnace to convert solid coal into a combustible gas. The coal gasification technology dynamically classifies the process of coal as fired in the furnace, and includes moving bed gasification, fluidized bed gasification, entrained flow gasification, molten bed gasification and the like. The entrained-flow gasification technology is parallel-flow gasification, coal dust with the particle size of less than 100 microns is brought into a gasification furnace by a gasifying agent, or the coal dust is made into coal water slurry firstly and then is pumped into the gasification furnace by a pump, the coal material and the gasification agent generate combustion reaction and gasification reaction at the temperature higher than the ash melting point of the coal material, and ash slag is discharged out of the gasification furnace in a liquid state.

At present, entrained flow bed gasification technology has great compatibility to coal types, particle sizes, sulfur and ash, entrained flow bed gasification technology comprises dry coal powder pressure gasification technology and coal water slurry pressure gasification technology, in the prior art, the dry coal powder pressure gasification technology or the coal water slurry pressure gasification technology is singly applied, solid wastes such as slag and filter cakes and the like generated by the entrained flow bed gasification technology can only be treated by landfill, so that the great waste of resources is caused, the generated waste water is sent out to a treatment solution to increase energy consumption, and the hydrogen-carbon ratio in synthesis gas generated after reaction can be conveyed to a downstream working section after being regulated by a carbon monoxide conversion device, wherein the regulation of the hydrogen-carbon ratio in the synthesis gas can also increase a great amount of energy consumption.

SUMMERY OF THE UTILITY MODEL

The utility model provides a coupling gasification device to solve among the prior art to the regulation of hydrogen carbon ratio in the synthetic gas that the entrained flow gasification technique reaction back produced, lead to the higher problem of energy consumption.

In order to solve the problem, the utility model provides a coupling gasification equipment, including dry coal powder gasification system and coal slurry gasification system, dry coal powder gasification system includes dry coal powder gasifier, first synthetic gas pipeline and first waste water pipeline, coal slurry gasification system includes coal slurry preparation facilities, coal slurry gasifier and second synthetic gas pipeline, the input and the dry coal powder gasifier intercommunication of first synthetic gas pipeline, the output of first synthetic gas pipeline is used for communicating with carbon monoxide conversion equipment, the input and the dry coal powder gasifier intercommunication of first waste water pipeline, the output and the input intercommunication of coal slurry preparation facilities of first waste water pipeline, the output and the gasifier intercommunication of coal slurry preparation facilities, coal slurry preparation facilities is arranged in making into the coal slurry with the waste water in buggy and the first waste water pipeline, the input and the gasifier intercommunication of second synthetic gas pipeline, the output and the first synthetic gas pipeline intercommunication of second synthetic gas pipeline.

Furthermore, the dry coal powder gasification system also comprises a first black water filtering mechanism, the coal water slurry gasification system also comprises a first slag filtering mechanism, the input end of the first black water filtering mechanism is communicated with the dry coal powder gasification furnace, the output end of the first black water filtering mechanism is used for being communicated with the boiler, and the first black water filtering mechanism is used for filtering black water generated after the reaction of the dry coal powder gasification furnace and then conveying the black water to the boiler; the input end of the first slag filtering mechanism is communicated with the water-coal-slurry gasification furnace, the output end of the first slag filtering mechanism is communicated with the boiler, and the first slag filtering mechanism is used for filtering slag generated after reaction of the water-coal-slurry gasification furnace and then conveying the slag to the boiler.

Further, first black water filter mechanism includes first sedimentation filter equipment and first filter cake mummification device, and first sedimentation filter equipment's input and dry coal powder gasifier intercommunication, first sedimentation filter equipment's output and first filter cake mummification device's input intercommunication, and first filter cake mummification device's output is used for communicating with the boiler, and first sedimentation filter equipment is used for filtering the black water that produces after the dry coal powder gasifier reaction and forms the filter cake, and first filter cake mummification device is used for carrying the filter cake mummification back to the boiler.

Further, the first slag filtering mechanism comprises a first slag dewatering pipeline and a first slag dewatering device, and the input end of the first slag dewatering pipeline is communicated with the coal water slurry gasification furnace; the output end of the first slag dewatering pipeline is used for being communicated with a boiler, and the first slag dewatering device is arranged on the first slag dewatering pipeline to filter slag generated after the coal slurry gasification furnace reacts.

Furthermore, the dry coal powder gasification system also comprises a second slag filtering mechanism, and the input end of the second slag filtering mechanism is communicated with the dry coal powder gasification furnace; and the output end of the second slag filtering mechanism is used for being communicated with a brick making device so as to filter slag generated after the reaction of the dry coal powder gasification furnace and convey the filtered slag to the brick making device.

Further, the second slag filtering mechanism comprises a second slag dewatering pipeline and a second slag dewatering device, and the input end of the second slag dewatering pipeline is communicated with the dry coal powder gasification furnace; the output end of the second slag dewatering pipeline is used for being communicated with the brick making device, and the second slag dewatering device is arranged on the second slag dewatering pipeline so as to filter slag generated after the dry coal powder gasification furnace reacts.

Furthermore, the coal water slurry gasification system also comprises a second black water filtering mechanism, the coupling gasification device also comprises a coal powder preparation device, the output end of the coal powder preparation device is communicated with the dry coal powder gasification furnace, and the coal powder preparation device is used for conveying coal powder for the dry coal powder gasification furnace and the coal water slurry preparation device; the input end of the second black water filtering mechanism is communicated with the coal water slurry gasification furnace, the output end of the second black water filtering mechanism is communicated with the input end of the coal powder preparation device, and the second black water filtering mechanism is used for filtering black water generated after reaction of the coal water slurry gasification furnace and then conveying the black water to the coal powder preparation device.

Furthermore, the second black water filtering mechanism comprises a second sedimentation filtering device and a second filter cake drying device, the input end of the second sedimentation filtering device is communicated with the coal water slurry gasification furnace, the output end of the second sedimentation filtering device is communicated with the input end of the second filter cake drying device, the output end of the second filter cake drying device is communicated with the input end of the coal powder preparation device, the second sedimentation filtering device is used for filtering black water generated after reaction of the coal water slurry gasification furnace to form a filter cake, and the second filter cake drying device is used for drying the filter cake and then conveying the filter cake to the coal powder preparation device.

Furthermore, the coal water slurry gasification system also comprises a second waste water pipeline, the input end of the second waste water pipeline is communicated with the coal water slurry gasification furnace, and the output end of the second waste water pipeline is communicated with the sewage treatment system.

Furthermore, the dry pulverized coal gasification systems and the coal water slurry gasification systems are multiple, and the multiple dry pulverized coal gasification systems and the multiple coal water slurry gasification systems are arranged in a one-to-one correspondence mode.

Use the technical scheme of the utility model, a coupling gasification equipment is provided, including dry coal powder gasification system and coal slurry gasification system, dry coal powder gasification system includes dry coal powder gasifier, first synthetic gas pipeline and first waste water pipeline, coal slurry gasification system includes coal slurry preparation facilities, coal slurry gasifier and second synthetic gas pipeline, the input and the dry coal powder gasifier intercommunication of first synthetic gas pipeline, the output of first synthetic gas pipeline is used for communicating with carbon monoxide conversion equipment, the input and the dry coal powder gasifier intercommunication of first waste water pipeline, the output and the input intercommunication of coal slurry preparation facilities of first waste water pipeline, coal slurry preparation facilities's output and gasifier intercommunication, coal slurry preparation facilities is arranged in making into the coal slurry with the waste water in buggy and the first waste water pipeline, the input and the gasifier intercommunication of second synthetic gas pipeline, the output and the first synthetic gas pipeline intercommunication of second synthetic gas pipeline. By adopting the scheme, the output end of the second synthesis gas pipeline is communicated with the first synthesis gas pipeline, and under the condition of equal load (equal pressure grade), because more synthesis gas is generated after the reaction of the dry coal powder gasification furnace and the hydrogen content is low (20-26%), less synthesis gas is generated after the reaction of the water-coal slurry gasification furnace and the hydrogen content is high (26-32%), the synthesis gas generated after the reaction of the dry coal powder gasification furnace and the synthesis gas generated after the reaction of the water-coal slurry gasification furnace are mixed, the hydrogen-carbon ratio of the synthesis gas is improved, the energy consumption of the carbon monoxide conversion device generated during adjustment is reduced, and the problem of high energy consumption caused by the adjustment of the hydrogen-carbon ratio in the synthesis gas generated after the reaction of the entrained flow gasification technology in the prior art is effectively solved; and in this scheme, with the output of first waste water pipeline and the input intercommunication of coal slurry preparation facilities, can prepare into aqueous coal slurry with the waste water and the buggy that the dry coal fines gasifier produced after the reaction through coal slurry preparation facilities like this, carry out recycle with the waste water that the dry coal fines gasifier produced after the reaction, avoided carrying out the outward transport processing to waste water, further reduced the energy consumption.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic structural diagram of a coupling gasification device provided by an embodiment of the present invention.

Wherein the figures include the following reference numerals:

10. a dry coal gasification system; 11. a dry coal dust gasification furnace; 12. a first syngas line; 13. a first waste water line; 14. a first black water filtering mechanism; 141. a first sedimentation filter device; 142. a first filter cake drying device; 15. a second slag filtering mechanism; 151. a second slag dewatering pipeline; 152. a second slag dewatering device;

20. a coal water slurry gasification system; 21. a coal water slurry preparation device; 22. a coal water slurry gasification furnace; 23. a second syngas line; 24. a first slag filtering mechanism; 241. a first slag dewatering line; 242. a first slag dewatering device; 25. a second black water filtering mechanism; 251. a second sedimentation filter device; 252. a second filter cake drying device; 26. a second waste water line;

30. a coal powder preparation device.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.

As shown in fig. 1, the embodiment of the utility model provides a coupling gasification equipment, including dry coal powder gasification system 10 and coal slurry gasification system 20, dry coal powder gasification system 10 includes dry coal powder gasifier 11, first synthetic gas pipeline 12 and first waste water pipeline 13, coal slurry gasification system 20 includes coal slurry preparation facilities 21, coal slurry gasifier 22 and second synthetic gas pipeline 23, the input and the dry coal powder gasifier 11 intercommunication of first synthetic gas pipeline 12, the output of first synthetic gas pipeline 12 is used for communicating with the carbon monoxide changer, the input and the dry coal powder gasifier 11 intercommunication of first waste water pipeline 13, the output and the input of coal slurry preparation facilities 21 of first waste water pipeline 13 communicate, the output and the gasifier 22 intercommunication of coal slurry preparation facilities 21, coal slurry preparation facilities 21 is used for preparing into the coal slurry with the waste water in buggy and the first waste water pipeline 13, the input and the gasifier 22 intercommunication of second synthetic gas pipeline 23, the output and the first synthetic gas pipeline 12 intercommunication of second synthetic gas pipeline 23.

By adopting the scheme, the output end of the second synthesis gas pipeline 23 is communicated with the first synthesis gas pipeline 12, and under the condition of equal load (equal pressure grade), because more synthesis gas is generated after the reaction of the dry coal powder gasification furnace 11 and the hydrogen content is low (20-26%), less synthesis gas is generated after the reaction of the water-coal-slurry gasification furnace 22 and the hydrogen content is high (26-32%), the synthesis gas generated after the reaction of the dry coal powder gasification furnace 11 is mixed with the synthesis gas generated after the reaction of the water-coal-slurry gasification furnace 22, the hydrogen-carbon ratio of the synthesis gas is improved, the energy consumption generated during adjustment of the carbon monoxide conversion device is reduced, and the problem of higher energy consumption caused by the adjustment of the hydrogen-carbon ratio in the synthesis gas generated after the reaction of the entrained flow gasification technology in the prior art is effectively solved; in addition, in the scheme, the output end of the first wastewater pipeline 13 is communicated with the input end of the coal water slurry preparation device 21, so that the wastewater and the coal powder generated after the reaction of the dry coal powder gasification furnace 11 can be prepared into coal water slurry through the coal water slurry preparation device 21, the wastewater generated after the reaction of the dry coal powder gasification furnace 11 is recycled, the wastewater is prevented from being sent out for treatment, and the energy consumption is further reduced.

The dry coal powder gasification system 10 further comprises a first black water filtering mechanism 14, the coal water slurry gasification system 20 further comprises a first slag filtering mechanism 24, the input end of the first black water filtering mechanism 14 is communicated with the dry coal powder gasification furnace 11, the output end of the first black water filtering mechanism 14 is communicated with a boiler, and the first black water filtering mechanism 14 is used for filtering black water generated after the reaction of the dry coal powder gasification furnace 11 and then conveying the black water to the boiler; the input end of the first slag filtering mechanism 24 is communicated with the water-coal-slurry gasification furnace 22, the output end of the first slag filtering mechanism 24 is used for being communicated with a boiler, and the first slag filtering mechanism 24 is used for filtering slag generated after the reaction of the water-coal-slurry gasification furnace 22 and then conveying the slag to the boiler. By adopting the arrangement mode, the output end of the first black water filtering mechanism 14 is communicated with the boiler, so that the black water generated after the reaction of the dry coal powder gasification furnace 11 can be conveyed into the boiler for blending combustion after being filtered, and the black water is recycled; the output end of the first slag filtering mechanism 24 is communicated with the boiler, so that the slag generated after the reaction of the water-coal-slurry gasification furnace 22 can be conveyed into the boiler for co-combustion after being filtered and dehydrated, and the slag is recycled. Wherein the black water is a solid-liquid mixture with high solid content.

Further, the first black water filtering mechanism 14 includes a first settling filter 141 and a first filter cake drying device 142, an input end of the first settling filter 141 is communicated with the dry pulverized coal gasifier 11, an output end of the first settling filter 141 is communicated with an input end of the first filter cake drying device 142, an output end of the first filter cake drying device 142 is used for being communicated with a boiler, the first settling filter 141 is used for filtering black water generated after reaction of the dry pulverized coal gasifier 11 to form a filter cake, and the first filter cake drying device 142 is used for drying the filter cake and then conveying the filter cake to the boiler. A first sedimentation filtering device 141 is provided to filter the black water generated after the reaction of the dry coal powder gasification furnace 11 and then form a filter cake; the first filter cake drying device 142 is arranged, can dry the filter cake and then convey the filter cake to the boiler for blending combustion.

Specifically, the first slag filtering mechanism 24 includes a first slag dewatering pipeline 241 and a first slag dewatering device 242, and an input end of the first slag dewatering pipeline 241 is communicated with the water-coal-slurry gasification furnace 22; the output end of the first slag dewatering pipeline 241 is used for communicating with a boiler, and the first slag dewatering device 242 is arranged on the first slag dewatering pipeline 241 to filter slag generated after the reaction of the coal-water slurry gasification furnace 22. The first slag dewatering device 242 is disposed on the first slag dewatering pipeline 241, so that slag generated after the reaction of the coal-water slurry gasification furnace 22 can be filtered by the first slag dewatering device 242, and then the filtered slag is conveyed to the boiler through the first slag dewatering pipeline 241 for co-combustion.

In this embodiment, the dry coal powder gasification system 10 further includes a second slag filtering mechanism 15, and an input end of the second slag filtering mechanism 15 is communicated with the dry coal powder gasification furnace 11; the output end of the second slag filtering mechanism 15 is used for communicating with a brick making device, so that slag generated after the reaction of the dry coal powder gasification furnace 11 is filtered and then conveyed to the brick making device. The second slag filtering mechanism 15 is arranged, and the output end of the second slag filtering mechanism 15 is communicated with the brick making device, so that slag generated after the reaction of the dry coal powder gasification furnace 11 is filtered and then conveyed to the brick making device, and the slag is used as a raw material for making bricks, and the recycling of resources is further improved.

The second slag filtering mechanism 15 comprises a second slag dewatering pipeline 151 and a second slag dewatering device 152, wherein the input end of the second slag dewatering pipeline 151 is communicated with the dry coal powder gasification furnace 11; the output end of the second slag dewatering pipeline 151 is used for communicating with a brick making device, and the second slag dewatering device 152 is arranged on the second slag dewatering pipeline 151 so as to filter slag generated after the reaction of the dry coal powder gasification furnace 11. The second slag dewatering device 152 is provided on the second slag dewatering line 151, so that slag generated after the reaction of the dry coal powder gasification furnace 11 can be filtered by the second slag dewatering device 152, and then the filtered slag is transported to the brick making device through the second slag dewatering line 151, thereby being used as a raw material for making bricks.

Specifically, the coal water slurry gasification system 20 further comprises a second black water filtering mechanism 25, the coupling gasification device further comprises a coal powder preparation device 30, the output end of the coal powder preparation device 30 is communicated with the dry coal powder gasification furnace 11, and the coal powder preparation device 30 is used for conveying coal powder for the dry coal powder gasification furnace 11 and the coal water slurry preparation device 21; the input end of the second black water filtering mechanism 25 is communicated with the coal water slurry gasification furnace 22, the output end of the second black water filtering mechanism 25 is communicated with the input end of the coal powder preparation device 30, and the second black water filtering mechanism 25 is used for filtering black water generated after the reaction of the coal water slurry gasification furnace 22 and then conveying the black water to the coal powder preparation device 30.

By adopting the arrangement mode, the output end of the second black water filtering mechanism 25 is communicated with the input end of the coal powder preparation device 30, so that the black water generated after the reaction of the coal water slurry gasification furnace 22 can be conveyed to the coal powder preparation device 30 after being filtered, and then the filtered black water is used as raw coal for coal powder preparation through the coal powder preparation device 30, so that the black water is recycled; the coal powder preparation device 30 is provided to treat the raw coal and the filtered black water, thereby obtaining coal powder. Wherein the black water is a solid-liquid mixture with high solid content.

The second black water filtering mechanism 25 comprises a second sedimentation filtering device 251 and a second filter cake drying device 252, the input end of the second sedimentation filtering device 251 is communicated with the coal water slurry gasification furnace 22, the output end of the second sedimentation filtering device 251 is communicated with the input end of the second filter cake drying device 252, the output end of the second filter cake drying device 252 is communicated with the input end of the coal powder preparation device 30, the second sedimentation filtering device 251 is used for filtering black water generated after reaction of the coal water slurry gasification furnace 22 to form a filter cake, and the second filter cake drying device 252 is used for drying the filter cake and then conveying the filter cake to the coal powder preparation device 30. A second sedimentation filtering device 251 is arranged, so that black water generated after the reaction of the coal water slurry gasification furnace 22 can be filtered, and then a filter cake is formed; the second filter cake drying device 252 is provided to dry the filter cake and then deliver the filter cake to the pulverized coal preparation device 30.

In this embodiment, the coal-water slurry gasification system 20 further includes a second waste water pipeline 26, an input end of the second waste water pipeline 26 is communicated with the coal-water slurry gasification furnace 22, and an output end of the second waste water pipeline 26 is used for communicating with the sewage treatment system. Through setting up second waste water pipeline 26, and with second waste water pipeline 26's output and sewage treatment system intercommunication, can handle the waste water that produces after the coal slurry gasifier 22 reacts like this, prevent the polluted environment.

Specifically, the dry pulverized coal gasification system 10 and the coal water slurry gasification system 20 are both multiple, and the multiple dry pulverized coal gasification systems 10 and the multiple coal water slurry gasification systems 20 are arranged in a one-to-one correspondence manner. The dry pulverized coal gasification system 10 and the coal water slurry gasification system 20 are provided in a plurality of numbers, so that the numbers of the dry pulverized coal gasification system 10 and the coal water slurry gasification system 20 can be correspondingly configured according to actual needs of a site, and actual requirements can be met.

The scheme has the advantages that:

1. after the synthesis gas generated after the reaction of the dry coal powder gasification furnace and the coal water slurry gasification furnace is mixed, the hydrogen-carbon ratio can be improved, and the energy consumption of a downstream carbon monoxide conversion device is reduced;

2. the slag and the black water generated after the reaction of the dry coal powder gasification furnace and the coal water slurry gasification furnace are correspondingly treated, so that the resource recycling is realized;

3. the wastewater generated after the reaction of the dry coal powder gasification furnace is sent to a coal water slurry preparation device, and is sent to the coal water slurry gasification furnace after being prepared into coal water slurry, so that the reutilization of the wastewater is realized, and the water treatment cost is reduced.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a coupling gasification equipment, characterized in that, includes dry buggy gasification system (10) and coal slurry gasification system (20), dry buggy gasification system (10) includes dry buggy gasifier (11), first synthetic gas pipeline (12) and first waste water pipeline (13), coal slurry gasification system (20) includes coal slurry preparation device (21), coal slurry gasifier (22) and second synthetic gas pipeline (23), the input of first synthetic gas pipeline (12) with dry buggy gasifier (11) intercommunication, the output of first synthetic gas pipeline (12) is used for communicating with carbon monoxide conversion equipment, the input of first waste water pipeline (13) with dry buggy gasifier (11) intercommunication, the output of first waste water pipeline (13) with the input of coal slurry preparation device (21) intercommunication, the output of coal slurry preparation device (21) with gasifier (22) intercommunication, preparation device (21) is used for preparing into water with the coal slurry in first waste water pipeline (13), the second coal slurry synthesis pipeline (23) and the second coal slurry gasifier (23) intercommunication.

2. The coupling gasification device according to claim 1, wherein the dry pulverized coal gasification system (10) further comprises a first black water filter mechanism (14), the coal water slurry gasification system (20) further comprises a first slag filter mechanism (24), an input end of the first black water filter mechanism (14) is communicated with the dry pulverized coal gasification furnace (11), an output end of the first black water filter mechanism (14) is used for being communicated with a boiler, and the first black water filter mechanism (14) is used for filtering black water generated after the reaction of the dry pulverized coal gasification furnace (11) and then conveying the filtered black water to the boiler; the input end of the first slag filtering mechanism (24) is communicated with the coal water slurry gasification furnace (22), the output end of the first slag filtering mechanism (24) is used for being communicated with the boiler, and the first slag filtering mechanism (24) is used for filtering slag generated after the reaction of the coal water slurry gasification furnace (22) and then conveying the slag to the boiler.

3. The coupled gasification device according to claim 2, wherein the first black water filtering mechanism (14) comprises a first sedimentation filtering device (141) and a first filter cake drying device (142), an input end of the first sedimentation filtering device (141) is communicated with the dry coal powder gasification furnace (11), an output end of the first sedimentation filtering device (141) is communicated with an input end of the first filter cake drying device (142), an output end of the first filter cake drying device (142) is used for being communicated with the boiler, the first sedimentation filtering device (141) is used for filtering black water generated after reaction of the dry coal powder gasification furnace (11) to form a filter cake, and the first filter cake drying device (142) is used for drying the filter cake and then conveying the filter cake to the boiler.

4. The coupled gasification device according to claim 2, wherein the first slag filtering mechanism (24) comprises a first slag dewatering pipeline (241) and a first slag dewatering device (242), and an input end of the first slag dewatering pipeline (241) is communicated with the coal-water slurry gasification furnace (22); the output end of the first slag dewatering pipeline (241) is used for being communicated with the boiler, and the first slag dewatering device (242) is arranged on the first slag dewatering pipeline (241) to filter slag generated after the reaction of the coal water slurry gasification furnace (22).

5. The coupled gasification device according to claim 1, wherein the dry pulverized coal gasification system (10) further comprises a second slag filtering mechanism (15), an input end of the second slag filtering mechanism (15) is communicated with the dry pulverized coal gasification furnace (11); and the output end of the second slag filtering mechanism (15) is used for being communicated with a brick making device so as to filter and convey slag generated after the reaction of the dry coal powder gasification furnace (11) to the brick making device.

6. The coupled gasification unit according to claim 5, wherein the second slag filtering mechanism (15) comprises a second slag dewatering line (151) and a second slag dewatering device (152), and an input end of the second slag dewatering line (151) is communicated with the dry pulverized coal gasification furnace (11); the output end of the second slag dewatering pipeline (151) is used for being communicated with the brick making device, and the second slag dewatering device (152) is arranged on the second slag dewatering pipeline (151) so as to filter slag generated after the reaction of the dry coal powder gasification furnace (11).

7. The coupling gasification device according to claim 1, wherein the coal water slurry gasification system (20) further comprises a second black water filtering mechanism (25), the coupling gasification device further comprises a coal powder preparation device (30), an output end of the coal powder preparation device (30) is communicated with the dry coal powder gasification furnace (11), and the coal powder preparation device (30) is used for conveying coal powder for the dry coal powder gasification furnace (11) and the coal water slurry preparation device (21); the input end of the second black water filtering mechanism (25) is communicated with the coal water slurry gasification furnace (22), the output end of the second black water filtering mechanism (25) is communicated with the input end of the coal powder preparation device (30), and the second black water filtering mechanism (25) is used for filtering black water generated after the reaction of the coal water slurry gasification furnace (22) and then conveying the black water to the coal powder preparation device (30).

8. The coupled gasification device according to claim 7, wherein the second black water filtering mechanism (25) comprises a second sedimentation filtering device (251) and a second filter cake drying device (252), the input end of the second sedimentation filtering device (251) is communicated with the coal water slurry gasification furnace (22), the output end of the second sedimentation filtering device (251) is communicated with the input end of the second filter cake drying device (252), the output end of the second filter cake drying device (252) is communicated with the input end of the pulverized coal preparation device (30), the second sedimentation filtering device (251) is used for filtering black water generated after the reaction of the coal water slurry gasification furnace (22) to form a filter cake, and the second filter cake drying device (252) is used for drying the filter cake and then conveying the filter cake to the pulverized coal preparation device (30).

9. The coupled gasification device according to claim 1, wherein the coal-water slurry gasification system (20) further comprises a second waste water pipeline (26), an input end of the second waste water pipeline (26) is communicated with the coal-water slurry gasification furnace (22), and an output end of the second waste water pipeline (26) is used for being communicated with a sewage treatment system.

10. The coupling gasification device according to claim 1, wherein the dry pulverized coal gasification system (10) and the coal water slurry gasification system (20) are both provided in plurality, and the dry pulverized coal gasification system (10) and the coal water slurry gasification system (20) are arranged in one-to-one correspondence.