Coal pyrolysis and coal bed gas deoxidation integrated device and method

Abstract

The invention discloses a coal pyrolysis and coal bed gas deoxidization integrated device and method. The device comprises a coal bed gas deoxidization device, a coal pyrolysis device, a deoxidizer cyclic regeneration device and a deoxidizer preparation device, wherein the coal bed gas deoxidation device is arranged above the coal pyrolysis device, the coal bed gas deoxidation device and the coal pyrolysis device are of an integrated structure, the coal pyrolysis device is connected with the deoxidizer preparation device, and the coal bed gas deoxidation device is connected with the deoxidizer preparation device; a coke oven gas channel is formed in the center of the coal bed gas deoxidation device, and the coal bed gas deoxidation device is communicated with the coal pyrolysis device through the coke oven gas channel; the coke oven gas generated by coal pyrolysis is used for providing heat for coal bed gas deoxidation, the coke generated by coal pyrolysis is used for preparing the coal bed gas deoxidizing agent, low-consumption and high-efficiency deoxidation of the low-concentration oxygen-containing coal bed gas is achieved, and meanwhile the methane concentration of the coke oven gas and recycling of waste heat of the coke oven gas are effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of coal chemical industry, and in particular to an integrated device and method for coal pyrolysis and coalbed methane deoxidation. Background Art

[0002] Coalbed methane, commonly known as gas, is a byproduct extracted during the safe mining process of coal mines to prevent gas outbursts and explosions. It has the advantages of being clean, environmentally friendly, high in calorific value, and easy to use. Therefore, it can be used as one of the main new energy sources. Low-concentration oxygen-containing coalbed methane contains a certain amount of oxygen, which poses an explosion risk during its utilization, which will impose certain restrictions and obstacles on the effective development and utilization of coalbed methane resources. Therefore, the primary task of effectively developing and utilizing coalbed methane is to remove oxygen from oxygen-containing coalbed methane. However, the development of new and efficient deoxygenation technology for low-concentration oxygen-containing coalbed methane is still in its early stages, with problems such as high energy consumption, high cost, and high CH4 loss. Therefore, it is urgent to develop efficient and low-consumption coalbed methane deoxygenation methods and equipment.

[0003] The prior art discloses a method for deoxidizing coalbed methane, which mixes low-concentration coalbed methane with CO2 and then reduces and deoxidizes it by contacting it with a carbon material to obtain deoxidized coalbed methane. However, this method requires a high temperature reaction with the carbon material, which consumes a lot of energy. In addition, a separate coalbed methane decarbonization process is required, which makes the device dispersed. In addition, there is also a two-stage deoxidation process using membrane separation and solution absorption for deoxidation, which makes the deoxidation process complicated and the device not compact. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides an integrated device and method for coal pyrolysis and coalbed methane deoxygenation, which utilizes the coke oven gas generated by coal pyrolysis to provide heat for coalbed methane deoxygenation, and utilizes the coke generated by coal pyrolysis to prepare a coalbed methane deoxidizer, thereby achieving low-consumption and high-efficiency deoxygenation of low-concentration oxygen-containing coalbed methane, effectively increasing the methane concentration of the coke oven gas and recovering the waste heat of the coke oven gas.

[0005] The technical solution of the present invention is as follows:

[0006] In the first aspect of the present invention, there is provided an integrated device for coal pyrolysis and coalbed methane deoxidation, comprising a coalbed methane deoxidation device, a coal pyrolysis device, a deoxidizer circulation and regeneration device and a deoxidizer preparation device; wherein the coalbed methane deoxidation device is arranged above the coal pyrolysis device, and the coalbed methane deoxidation device and the coal pyrolysis device are an integrated structure, the coal pyrolysis device is connected to the deoxidizer preparation device, and the coalbed methane deoxidation device is connected to the deoxidizer preparation device; a coke oven gas channel is arranged at the center of the coalbed methane deoxidation device, the coalbed methane deoxidation device and the coal pyrolysis device are connected through the coke oven gas channel, the coke oven gas generated by the coal pyrolysis device heats the coalbed methane deoxidation device through the coke oven gas channel, and the coalbed methane deoxidized by the coalbed methane deoxidation device is discharged through the coke oven gas channel.

[0007] In some embodiments of the present invention, the space between the wall of the coalbed methane deoxygenation device and the coke oven gas channel is the coalbed methane deoxygenation space, a deoxidizer inlet and a deoxidizer replenishing port are arranged at the top of the coalbed methane deoxygenation device, and an oxygen-containing coalbed methane inlet and a deoxidizer outlet are arranged at the bottom of the side wall of the coalbed methane deoxygenation device.

[0008] In some embodiments of the present invention, the bottom end of the coke oven gas channel passes through the bottom of the coalbed methane deoxygenation device and extends into the coal pyrolysis device, and the top end of the coke oven gas channel extends from the top of the coalbed methane deoxygenation device.

[0009] In some embodiments of the present invention, a coalbed methane outlet is provided on the side wall surface of the coke oven gas channel near the top of the coalbed methane deoxygenation device, the coke oven gas channel is connected to the coalbed methane deoxygenation space of the coalbed methane deoxygenation device through the coalbed methane outlet, and a one-way valve is provided at the coalbed methane outlet.

[0010] In some embodiments of the present invention, the deoxidizer outlet is connected to the inlet of the deoxidizer circulation and regeneration device, the outlet of the deoxidizer circulation and regeneration device is connected to the deoxidizer inlet, the deoxidizer replenishing port is connected to the outlet of the deoxidizer preparation device, and the inlet of the deoxidizer preparation device is connected to the coke discharge outlet of the coal pyrolysis device.

[0011] In some embodiments of the present invention, a deoxidizer disperser is provided in the coalbed methane deoxidation space, and the deoxidizer disperser is located below the deoxidizer inlet and the deoxidizer replenishing port.

[0012] In some embodiments of the present invention, a coal material inlet is provided at the top of the side wall of the coal pyrolysis device, a stirrer and a rotating grate are provided in the coal pyrolysis device, and the rotating grate is supported by a grate bracket.

[0013] In some embodiments of the present invention, the motor of the mixer is installed at the bottom of the rotating grate, the mixing blades of the mixer are installed at the top of the rotating grate through a rotating shaft, and the rotating grate adopts a pagoda-shaped structure.

[0014] In some embodiments of the present invention, thermal insulation materials are provided on the exterior of the coalbed methane deoxygenation device and the coal pyrolysis device.

[0015] In a second aspect of the present invention, a working method of an integrated coal pyrolysis and coalbed methane deoxidation device is provided, comprising the following steps:

[0016] The coal is added into the coal pyrolysis device, the coal is burned and pyrolyzed in the coal pyrolysis device to release heat, coke and ash are discharged from the slag discharge port, and the coke oven gas is discharged upward through the coke oven gas channel. The discharged coke oven gas heats the coal bed methane deoxidation device through the coke oven gas channel;

[0017] The oxygen-containing coal-bed methane enters the coal-bed methane deoxygenation device, where the oxygen in the coal-bed methane is removed by the action of the deoxidizer; the coal-bed methane after deoxygenation enters the coke oven gas channel, merges with the coke oven gas generated by pyrolysis, and is discharged together;

[0018] The deoxidized deoxidizer enters the deoxidizer regeneration device from the coal-bed methane deoxidizer for reduction and regeneration, and the deoxidizer after reduction and regeneration re-enters the coal-bed methane deoxidizer for recycling;

[0019] Part of the coke discharged from the coal pyrolysis device enters the deoxidizer preparation device, and the prepared deoxidizer enters the coalbed methane deoxidation device to participate in the deoxidation cycle.

[0020] One or more technical solutions of the present invention have the following beneficial effects:

[0021] (1) The integrated coal pyrolysis and coalbed methane deoxygenation device provided by the present invention combines a coalbed methane deoxygenation device and a coal pyrolysis device into an integrated structure, and utilizes the low-grade thermal energy of coke oven gas generated during the coal pyrolysis process to provide heat for the coalbed methane deoxygenation process, thereby improving the energy utilization rate of the entire deoxygenation process; at the same time, it realizes the effective removal of oxygen from the oxygen-containing coalbed methane, thereby improving the utilization rate of the oxygen-containing coalbed methane.

[0022] (2) The integrated coal pyrolysis and coalbed methane deoxidation device provided by the present invention realizes the recycling of the deoxidizer by setting up a deoxidizer recycling and regeneration device. The deoxidizer adopts a manganese-based or iron-based deoxidizer with coke as a carrier. The coke generated in the coal pyrolysis process can be used as a raw material to prepare the deoxidizer through the deoxidizer preparation device, thereby realizing the recycling of the deoxidizer and reducing the deoxidation cost.

[0023] (3) The integrated coal pyrolysis and coalbed methane deoxidation device provided by the present invention provides a coke oven gas channel inside the coalbed methane deoxidation device, so that the coke oven gas generated during the pyrolysis of the coal can be discharged after passing through the coalbed methane deoxidation device, thereby providing heat for the deoxidation process of the coalbed methane; and a one-way valve is provided at the coalbed methane outlet of the coke oven gas channel, so that the deoxidized coalbed methane can pass through the one-way valve into the coke oven gas channel and be discharged after merging with the coke oven gas.

[0024] (4) The integrated device for coal pyrolysis and coalbed methane deoxidation provided by the present invention is simple in overall equipment and compact in structure. It realizes the integration of coal pyrolysis and coalbed methane deoxidation processes, and utilizes the waste heat of coke oven gas generated by coal pyrolysis to provide heat for coalbed methane deoxidation, and realizes coalbed methane deoxidation while utilizing the waste heat. At the same time, the main component of deoxidized coalbed methane is methane, and methane is also one of the main components of coke oven gas. By combining the deoxidized coalbed methane and coke oven gas, the methane component in the coke oven gas can be enriched, and can be used together in the later stage. The comprehensive utilization of coal pyrolysis products and coalbed methane resources has important economic and environmental significance for improving and optimizing the energy structure, reducing production costs, and reducing air pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the integrated device for coal pyrolysis and coalbed methane deoxidation of the present invention;

[0026] Figure 2 Schematic diagram of the deoxidizer disperser of the present invention.

[0027] In the figure: 1. Coalbed methane deoxidation device; 2. Coal pyrolysis device; 3. Deoxidizer recycling and regeneration device; 4. Deoxidizer preparation device; 5. Coke oven gas outlet; 6. Deoxidizer inlet; 7. Deoxidizer replenishing port; 8. Deoxidizer disperser; 9. Coke oven gas inlet; 10. Oxygen-containing coalbed methane inlet; 11. Deoxidizer outlet; 12. Coke oven gas channel; 13. Coalbed methane outlet; 14. One-way valve; 15. Coal charge inlet; 16. Mixer; 17. Coke discharge outlet; 18. Rotating grate; 19. Mixing blades; 20. Grate bracket; 21. First insulation layer; 22. Second insulation layer. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0029] Example 1

[0030] In a typical embodiment of the present invention, a coal pyrolysis and coalbed methane deoxidation integrated device is proposed, such as Figure 1As shown, it includes a coalbed methane deoxidation device 1, a coal pyrolysis device 2, a deoxidizer recycling and regeneration device 3 and a deoxidizer preparation device 4; wherein the coalbed methane deoxidation device 1 is arranged above the coal pyrolysis device 2, and the coalbed methane deoxidation device 1 and the coal pyrolysis device 2 are an integrated structure, the coal pyrolysis device 2 is connected to the deoxidizer preparation device 4, and the coalbed methane deoxidation device 1 is connected to the deoxidizer preparation device 4; a coke oven gas channel 12 is arranged at the center of the coalbed methane deoxidation device 1, and the coalbed methane deoxidation device 1 and the coal pyrolysis device 2 are connected through the coke oven gas channel 12, the coke oven gas generated by the coal pyrolysis device 2 heats the coalbed methane deoxidation device 1 through the coke oven gas channel 12, and the deoxidized coalbed methane of the coalbed methane deoxidation device 1 is discharged through the coke oven gas channel 12.

[0031] In this embodiment, the space between the wall of the coalbed methane deoxygenation device 1 and the coke oven gas channel 12 is the coalbed methane deoxygenation space, the top of the coalbed methane deoxygenation device 1 is provided with a deoxidizer inlet 6 and a deoxidizer replenishing port 7, and the bottom of the side wall of the coalbed methane deoxygenation device 1 is provided with an oxygen-containing coalbed methane inlet 10 and a deoxidizer outlet 11.

[0032] Furthermore, the bottom end of the coke oven gas channel 12 passes through the bottom of the coal bed gas deoxidation device 1 and extends into the coal pyrolysis device 2, and the top end of the coke oven gas channel 12 extends from the top of the coal bed gas deoxidation device 1. Specifically, the coke oven gas inlet 9 at the bottom of the coke oven gas channel 12 is placed in the coal pyrolysis device 2, and the coke oven gas outlet 5 at the top of the coke oven gas channel 12 is located at the top of the coal bed gas deoxidation device 1. The coke oven gas generated by the coal pyrolysis device 2 enters the coke oven gas channel 12 through the coke oven gas inlet 9 and is discharged through the coke oven gas outlet 5. When the coke oven gas passes through the coke oven gas channel, the coal bed gas deoxidation device 1 in the coal bed gas deoxidation device 1 is heated.

[0033] Furthermore, a coalbed methane outlet 13 is provided on the side wall surface of the coke oven gas channel 12 near the top of the coalbed methane deoxygenation device, and the coke oven gas channel is connected with the coalbed methane deoxygenation space of the coalbed methane deoxygenation device 1 through the coalbed methane outlet 13, and a one-way valve 14 is provided at the coalbed methane outlet 13; through the setting of the one-way valve 14, only the deoxidized coalbed methane in the coal pyrolysis device 2 is allowed to enter the coke oven gas channel 12 through the coalbed methane outlet 13.

[0034] In this embodiment, the deoxidizer outlet 11 is connected to the inlet of the deoxidizer recycling and regeneration device 3, the outlet of the deoxidizer recycling and regeneration device 3 is connected to the deoxidizer inlet 6, the deoxidizer replenishing port 7 is connected to the outlet of the deoxidizer preparation device 4, and the inlet of the deoxidizer preparation device 4 is connected to the coke discharge port 17 of the coal pyrolysis device 2. Among them, the deoxidizer is a composite deoxidizer, a manganese-based or iron-based deoxidizer with coke as a carrier is used, and after the deoxidizer deoxidizes the oxygen-containing coalbed methane in the coalbed methane deoxidation device 1, it is discharged from the deoxidizer outlet 11 and enters the deoxidizer recycling and regeneration device 3 for reduction and regeneration, and the regenerated deoxidizer enters the coalbed methane deoxidation device 1 through the deoxidizer inlet 6 for recycling. Part of the coke generated in the coal pyrolysis device 2 enters the deoxidizer preparation device 4 through the coke discharge port 17 to prepare the deoxidizer, and the obtained deoxidizer enters the coalbed methane deoxidation device 1 through the deoxidizer replenishing port 7 for utilization. The deoxidizer recycling and regeneration device 3 and the deoxidizer preparation device 4 both directly adopt existing devices.

[0035] Furthermore, a deoxidizer disperser 8 is provided in the coalbed methane deoxidation space, and the deoxidizer disperser 8 is located below the deoxidizer inlet 6 and the deoxidizer replenishing port 7. Figure 2 As shown, the deoxidizer disperser 8 is supported by a triangular bracket, and the two ends of the bracket are respectively welded to the inner wall of the coalbed methane deoxidation device 1 and the outer wall of the coke oven gas channel 12. Specifically, the deoxidizer disperser 8 is composed of a triangular bracket supporting a circular platform with holes. When the deoxidizer falls from the deoxidizer inlet 6 and the deoxidizer replenishing port 7, the deoxidizer can fall through the holes. When the deoxidizer accumulates on the disc, as the accumulation increases, the deoxidizer can fall from all around the disc. A simple schematic diagram of the deoxidizer disperser is added. By dispersing the deoxidizer through the deoxidizer disperser 8, the contact efficiency between the deoxidizer and the oxygen-containing coalbed methane is increased to a certain extent, and the utilization rate of the deoxidizer is improved.

[0036] In this embodiment, a coal material inlet 15 is provided at the top of the side wall of the coal pyrolysis device 2, and a mixer 16 and a rotating grate 18 are provided in the coal pyrolysis device 2. The mixer 16 and the upper layer of the rotating grate 18 are connected as a whole through a rotating shaft. The mixer 16 drives the grate and the stirring blades to rotate, and the bottom layer of the rotating grate 18 is supported and fixed by a bracket.

[0037] The rotating grate 18 is supported by a grate support 20. The grate support 20 is an inclined triangular support, and the grate support 20 is welded to the inner wall surface of the coal pyrolysis device 2.

[0038] Furthermore, the motor of the mixer 16 is installed at the bottom of the rotating grate 18, and the mixing blades 19 of the mixer 16 are installed on the top of the rotating grate 18 through the rotating shaft. The rotating grate 18 adopts a pagoda-shaped structure. The rotating grate adopts a pagoda-shaped structure to facilitate the ash generated after coal pyrolysis and combustion to automatically fall with the rotating grate, avoiding manual cleaning.

[0039] In this embodiment, thermal insulation materials are provided on the outside of the coalbed methane deoxygenation device 1 and the coal pyrolysis device 2. Specifically, a first thermal insulation layer 21 is provided on the outside of the coalbed methane deoxygenation device 1, and a second thermal insulation layer 22 is provided on the outside of the coal pyrolysis device 2 to reduce heat loss.

[0040] In this embodiment, the coalbed methane deoxidation device 1 and the coal pyrolysis device 2 both adopt a cylindrical structure.

[0041] The working process of the integrated coal pyrolysis and coalbed methane deoxidation device provided in this embodiment is as follows:

[0042] (1) Coal enters the coal pyrolysis device 1 from the inlets on both sides of the upper part of the coal pyrolysis device 1. Under the action of the mixer, the coal is fully burned and pyrolyzed, releasing a large amount of heat. Coke and ash are discharged from the coke discharge port 17, and coke oven gas is discharged upward through the coke oven gas channel 12. The discharged coke oven gas heats the coalbed methane deoxidation device 1 through the coke oven gas channel 12;

[0043] (2) Low-concentration oxygen-containing coalbed methane enters the coalbed methane deoxidation device 1 from the oxygen-containing coalbed methane inlet 10 on the bottom side of the coalbed methane deoxidation device 1; the deoxidizer enters the coalbed methane deoxidation device 1 from the deoxidizer inlets on both sides of the upper center, and the deoxidizer moves from top to bottom after passing through the deoxidizer disperser 8, and contacts with the rising low-concentration oxygen-containing coalbed methane, thereby removing oxygen from the coalbed methane; the coalbed methane after deoxygenation enters the coke oven gas channel 12 through the one-way valve 14, and is discharged together with the coke oven gas generated by pyrolysis;

[0044] (3) The deoxidized deoxidizer enters the deoxidizer recycling and regeneration device 3 from the deoxidizer outlet 11 at the bottom side of the coalbed methane deoxidizer 1, and the reduced and regenerated deoxidizer re-enters the coalbed methane deoxidizer 1 through the deoxidizer inlet 6 on both sides of the upper center through the pipeline for recycling;

[0045] (4) The coke discharged from the coke outlet 17 enters the deoxidizer preparation device 4, and the prepared deoxidizer enters the coalbed methane deoxidation device 1 from the deoxidizer replenishing port 7 through the conveying pipeline to participate in the deoxidation cycle.

[0046] Specifically, the combustion and pyrolysis process of coal in the coal pyrolysis device in step (1) is as follows: as coal is added from the top, the coal will accumulate in the coal pyrolysis device, and the coal material at the bottom layer will contact with air or oxygen to burn and generate high temperature, releasing a large amount of heat, and providing sufficient energy for the system. The upper layer of coal material will pyrolyze under the action of high temperature, and the generated ash and coke will fall and be discharged from the discharge port. The function of the agitator is to allow the coal added from the top to be evenly dispersed in the device, and on the other hand, it is convenient for the generated coke and ash to fall under the action of stirring. At the same time, the stirring action can also facilitate the lower layer of coal material to fully contact with air or oxygen to generate more heat.

[0047] Furthermore, in the step (1), the particle size of the coal material is 0.1-40 mm, and the coal material is pulverized coal or water-coal slurry.

[0048] Furthermore, the deoxidizer in step (2) is a composite deoxidizer, a manganese-based or iron-based deoxidizer with coke as a carrier. This step utilizes the waste heat of coke oven gas generated by coal pyrolysis to provide heat for coalbed methane deoxidation, and the waste heat is utilized to achieve coalbed methane deoxidation. At the same time, the main component of the deoxidized coalbed methane is methane, and methane is also one of the main components of coke oven gas. Therefore, the deoxidized coalbed methane and coke oven gas are combined to enrich the methane component in the coke oven gas, and can be used together in the later stage.

[0049] Furthermore, the coke and coke oven gas produced by coal pyrolysis, etc., the coke oven gas is generally used as raw gas for synthesizing other products or directly used as fuel gas after purification, and the coke is generally used in metal smelting and other aspects. In step (4), the deoxidizer is prepared by using coke because, on the one hand, coke itself can deoxidize, and on the other hand, the cost of coke itself is low. Using it as a carrier to prepare a composite deoxidizer can reduce costs and obtain a recyclable deoxidizer.

[0050] Furthermore, the deoxidation temperature in step (2) is 200-800°C.

[0051] Example 2

[0052] In a typical embodiment of the present invention, a working method of an integrated device for coal pyrolysis and coalbed methane deoxidation is provided, comprising the following steps:

[0053] The coal is added into the coal pyrolysis device, the coal is burned and pyrolyzed in the coal pyrolysis device to release heat, coke and ash are discharged from the slag discharge port, and the coke oven gas is discharged upward through the coke oven gas channel. The discharged coke oven gas heats the coal bed methane deoxidation device through the coke oven gas channel;

[0054] The oxygen-containing coal-bed methane enters the coal-bed methane deoxygenation device, where the oxygen in the coal-bed methane is removed by the action of the deoxidizer; the coal-bed methane after deoxygenation enters the coke oven gas channel, merges with the coke oven gas generated by pyrolysis, and is discharged together;

[0055] The deoxidized deoxidizer enters the deoxidizer regeneration device from the coal-bed methane deoxidizer for reduction and regeneration, and the deoxidizer after reduction and regeneration re-enters the coal-bed methane deoxidizer for recycling;

[0056] Part of the coke discharged from the coal pyrolysis device enters the deoxidizer preparation device, and the prepared deoxidizer enters the coalbed methane deoxidation device to participate in the deoxidation cycle.

[0057] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the scope of protection of the present invention.

Claims

1. An integrated device for coal pyrolysis and coalbed methane deoxidation, characterized in that: The invention comprises a coalbed methane deoxidation device, a coal pyrolysis device, a deoxidizer circulation and regeneration device and a deoxidizer preparation device; wherein the coalbed methane deoxidation device is arranged above the coal pyrolysis device, and the coalbed methane deoxidation device and the coal pyrolysis device are an integrated structure, the coal pyrolysis device is connected to the deoxidizer preparation device, and the coalbed methane deoxidation device is connected to the deoxidizer preparation device; a coke oven gas channel is arranged at the center of the coalbed methane deoxidation device, the coalbed methane deoxidation device and the coal pyrolysis device are connected through the coke oven gas channel, the coke oven gas generated by the coal pyrolysis device heats the coalbed methane deoxidation device through the coke oven gas channel, and the coalbed methane deoxidized by the coalbed methane deoxidation device is discharged through the coke oven gas channel.

2. The integrated device for coal pyrolysis and coalbed methane deoxidation according to claim 1, characterized in that: The space between the wall of the coalbed methane deoxygenation device and the coke oven gas channel is the coalbed methane deoxygenation space. The top of the coalbed methane deoxygenation device is provided with a deoxidizer inlet and a deoxidizer replenishing port. The bottom of the side wall of the coalbed methane deoxygenation device is provided with an oxygen-containing coalbed methane inlet and a deoxidizer outlet.

3. The integrated device for coal pyrolysis and coalbed methane deoxidation according to claim 2, characterized in that: The bottom end of the coke oven gas channel passes through the bottom of the coal bed gas deoxidation device and extends into the coal pyrolysis device, and the top end of the coke oven gas channel extends from the top of the coal bed gas deoxidation device.

4. The integrated device for coal pyrolysis and coalbed methane deoxidation according to claim 3, characterized in that: A coalbed methane outlet is arranged on the side wall surface of the coke oven gas channel near the top of the coalbed methane deoxidation device. The coke oven gas channel is connected with the coalbed methane deoxidation space of the coalbed methane deoxidation device through the coalbed methane outlet. A one-way valve is arranged at the coalbed methane outlet.

5. The integrated device for coal pyrolysis and coalbed methane deoxidation according to claim 2, characterized in that: The deoxidizer outlet is connected to the inlet of the deoxidizer circulation and regeneration device, the outlet of the deoxidizer circulation and regeneration device is connected to the deoxidizer inlet, the deoxidizer replenishing port is connected to the outlet of the deoxidizer preparation device, and the inlet of the deoxidizer preparation device is connected to the coke discharge outlet of the coal pyrolysis device.

6. The integrated device for coal pyrolysis and coalbed methane deoxidation according to claim 2, characterized in that: A deoxidizer disperser is arranged in the coalbed methane deoxidation space, and the deoxidizer disperser is located below the deoxidizer inlet and the deoxidizer replenishing port.

7. The integrated device for coal pyrolysis and coalbed methane deoxidation according to claim 1, characterized in that: A coal material inlet is arranged on the top of the side wall of the coal pyrolysis device. A stirrer and a rotating grate are arranged inside the coal pyrolysis device. The rotating grate is supported by a grate bracket.

8. The integrated device for coal pyrolysis and coalbed methane deoxidation according to claim 7, characterized in that: The motor of the mixer is installed at the bottom of the rotating grate, and the mixing blades of the mixer are installed at the top of the rotating grate through a rotating shaft. The rotating grate adopts a pagoda-shaped structure.

9. The integrated device for coal pyrolysis and coalbed methane deoxidation according to claim 1, characterized in that: The exterior of the coalbed methane deoxidation device and the coal pyrolysis device is provided with heat insulation materials.

10. A working method of the integrated coal pyrolysis and coalbed methane deoxidation device according to any one of claims 1 to 9, characterized in that: The following steps are involved: The coal is added into the coal pyrolysis device, the coal is burned and pyrolyzed in the coal pyrolysis device to release heat, coke and ash are discharged from the slag discharge port, and the coke oven gas is discharged upward through the coke oven gas channel. The discharged coke oven gas heats the coal bed methane deoxidation device through the coke oven gas channel; The oxygen-containing coal-bed methane enters the coal-bed methane deoxygenation device, where the oxygen in the coal-bed methane is removed by the action of the deoxidizer; the coal-bed methane after deoxygenation enters the coke oven gas channel, merges with the coke oven gas generated by pyrolysis, and is discharged together; The deoxidized deoxidizer enters the deoxidizer regeneration device from the coal-bed methane deoxidizer for reduction and regeneration, and the deoxidizer after reduction and regeneration re-enters the coal-bed methane deoxidizer for recycling; Part of the coke discharged from the coal pyrolysis device enters the deoxidizer preparation device, and the prepared deoxidizer enters the coalbed methane deoxidation device to participate in the deoxidation cycle.

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