An integrated device and method for coal pyrolysis and deoxidation of coalbed methane

Abstract

The present invention discloses an integrated device and method for coal pyrolysis and deoxidation of coalbed methane. The device includes a coalbed methane deoxidation device, a coal pyrolysis device, a deoxidizer circulation and regeneration device, and a deoxidizer preparation device. Among them, the coalbed methane deoxidation device is arranged above the coal pyrolysis device, and the coalbed methane deoxidation device and the coal pyrolysis device are of 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, and the coalbed methane deoxidation device and the coal pyrolysis device are connected and communicated through the coke oven gas channel. The present invention uses the coke oven gas generated by coal pyrolysis to provide heat for the deoxidation of coalbed methane, and uses the coke produced by coal pyrolysis to prepare the deoxidizer for coalbed methane. While realizing low-consumption and high-efficiency deoxidation of low-concentration oxygen-containing coalbed methane, it effectively improves the methane concentration of coke oven gas and the recovery and utilization of the waste heat of coke oven gas.

Description

Technical Field

[0001] The present invention relates to the technical field of coal chemical industry, and particularly relates to a device and method for integrating coal pyrolysis and deoxidation of coalbed methane. Background Art

[0002] Coalbed methane, commonly known as gas, is a by-product extracted during the safe coal mining process of preventing gas outburst and explosion. It has the advantages of being clean and environmentally friendly, having a high calorific value, and being convenient to use. Therefore, it can be used as one of the main new energy sources. Low-concentration oxygen-containing coalbed methane has an explosion risk during utilization due to the presence of a certain amount of oxygen, which will impose certain limitations 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 the oxygen in oxygen-containing coalbed methane. However, the development of new and efficient deoxidation technologies for low-concentration oxygen-containing coalbed methane is still in its infancy, with problems such as high energy consumption, high cost, and relatively large CH4 loss. Therefore, there is an urgent need to develop efficient and low-consumption methods and equipment for deoxidizing coalbed methane.

[0003] A deoxidation method of coalbed methane is disclosed in the prior art. Low-concentration coalbed methane is mixed with CO2 and then undergoes a reduction and deoxidation reaction by contacting with carbon materials to obtain deoxidized coalbed methane. However, this method requires a reaction with carbon materials at high temperature, resulting in high energy consumption; and it requires an additional coalbed methane decarbonization process, making the device dispersed. In addition, there is also a two-stage deoxidation process using membrane separation and solution absorption for deoxidation, making the deoxidation process complex and the device not compact. Summary of the Invention

[0004] Aiming at the problems existing in the prior art, the present invention provides a device and method for integrating coal pyrolysis and deoxidation of coalbed methane. The coke oven gas generated by coal pyrolysis is used to provide heat for deoxidizing coalbed methane, and the coke produced by coal pyrolysis is used to prepare a deoxidizer for coalbed methane. While achieving low-consumption and high-efficiency deoxidation of low-concentration oxygen-containing coalbed methane, the methane concentration of coke oven gas and the recovery and utilization of the waste heat of coke oven gas are effectively improved.

[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 deoxidation of coalbed methane, which includes 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 of 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, and 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 after deoxidation 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 surface of the coalbed methane deoxidation device and the coke oven gas channel is a coalbed methane deoxidation space. A deoxidizer inlet and a deoxidizer supplement port are arranged at the top of the coalbed methane deoxidation 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 deoxidation 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 deoxidation device and extends into the coal pyrolysis device, and the top end of the coke oven gas channel extends out from the top of the coalbed methane deoxidation device.

[0009] In some embodiments of the present invention, 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 to the coalbed methane deoxidation space of the coalbed methane deoxidation device through the coalbed methane outlet, and a check valve is arranged 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 supplement 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 arranged in the coalbed methane deoxidation space, and the deoxidizer disperser is located below the deoxidizer inlet and the deoxidizer supplement port.

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

[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, heat-insulating and heat-preserving materials are provided on the exteriors of the coalbed methane deoxidation device and the coal pyrolysis device.

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

[0016] Add coal material into the coal pyrolysis device, the coal burns and pyrolyzes in the coal pyrolysis device, releasing heat, the coke and ash are discharged from the slag discharge port, and the coke oven gas is discharged upward through the coke oven gas passage, and the discharged coke oven gas heats the coalbed methane deoxidation device through the coke oven gas passage;

[0017] The oxygen-containing coalbed methane enters the coalbed methane deoxidation device, and the oxygen in the coalbed methane is removed under the action of the deoxidant; the coalbed methane after oxygen removal enters the coke oven gas passage and is discharged together after converging with the coke oven gas generated by pyrolysis;

[0018] The deoxidant after deoxidation enters the deoxidant regeneration device from the coalbed methane deoxidation device for reduction and regeneration, and the deoxidant after reduction and regeneration re-enters the coalbed methane deoxidation device for cyclic use;

[0019] Part of the coke discharged from the coal pyrolysis device enters the deoxidant preparation device, and the prepared deoxidant 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 device for coal pyrolysis and coalbed methane deoxidation provided by the present invention combines the coalbed methane deoxidation device and the coal pyrolysis device into an integrated structure, uses the low-grade heat energy of the coke oven gas generated during the coal pyrolysis process to heat the deoxidation process of the coalbed methane, improves the energy utilization rate of the entire deoxidation process; at the same time, effectively removes the oxygen in the oxygen-containing coalbed methane and improves the utilization rate of the oxygen-containing coalbed methane.

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

[0023] (3) The integrated device for coal pyrolysis and coalbed methane deoxidation provided by the present invention is provided with a coke oven gas passage inside the coalbed methane deoxidation device, so that the coke oven gas generated during the pyrolysis process of coal can be discharged after passing through the coalbed methane deoxidation device, providing heat for the deoxidation process of coalbed methane; by setting a check valve at the coalbed methane outlet of the coke oven gas passage, the deoxidized coalbed methane can enter the coke oven gas passage through the check valve, and is discharged after converging with the coke oven gas.

[0024] (4) The integrated device for coal pyrolysis and coalbed methane deoxidation provided by the present invention has a simple and compact structure, realizing the integration of the coal pyrolysis and coalbed methane deoxidation processes. The waste heat of the coke oven gas generated by coal pyrolysis is used to provide heat for coalbed methane deoxidation, and coalbed methane deoxidation is realized while utilizing the waste heat. At the same time, the main component of the deoxidized coalbed methane is methane, and methane is also one of the main components in coke oven gas. By converging the deoxidized coalbed methane and coke oven gas, the methane component in coke oven gas can be enriched and can be utilized together later. 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 is a schematic structural diagram of the integrated device for coal pyrolysis and coalbed methane deoxidation of the present invention;

[0026] Figure 2 is a 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 circulation and regeneration device; 4, deoxidizer preparation device; 5, coke oven gas outlet; 6, deoxidizer inlet; 7, deoxidizer supplement port; 8, deoxidizer disperser; 9, coke oven gas inlet; 10, oxygen-containing coalbed methane inlet; 11, deoxidizer outlet; 12, coke oven gas passage; 13, coalbed methane outlet; 14, check valve; 15, coal feed inlet; 16, mixer; 17, coke discharge outlet; 18, rotating grate; 19, stirring blade; 20, grate support; 21, first heat insulation layer; 22, second heat insulation layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

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

[0029] Embodiment 1

[0030] In a typical embodiment of the present invention, an integrated device for coal pyrolysis and coalbed methane deoxidation is proposed, as Figure 1As shown in the figure, it includes a coalbed methane deoxidation device 1, a coal pyrolysis device 2, a deoxidizer circulation and regeneration device 3, and a deoxidizer preparation device 4. Among them, 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 of an integral 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. 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 in the coalbed methane deoxidation device 1 is discharged through the coke oven gas channel 12.

[0031] In this embodiment, the space between the wall surface of the coalbed methane deoxidation device 1 and the coke oven gas channel 12 is the coalbed methane deoxidation space. A deoxidizer inlet 6 and a deoxidizer supplement port 7 are arranged at the top of the coalbed methane deoxidation device 1, and an oxygen-containing coalbed methane inlet 10 and a deoxidizer outlet 11 are arranged at the bottom of the side wall of the coalbed methane deoxidation device 1.

[0032] Furthermore, the bottom end of the coke oven gas channel 12 passes through the bottom of the coalbed methane deoxidation device 1 and extends into the coal pyrolysis device 2, and the top end of the coke oven gas channel 12 extends out from the top of the coalbed methane 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 coalbed methane 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, it heats the coalbed methane deoxidation device 1 in the coalbed methane deoxidation device 1.

[0033] Furthermore, a coalbed methane outlet 13 is arranged on the side wall surface of the coke oven gas channel 12 near the top of the coalbed methane deoxidation device. The coke oven gas channel is connected to the coalbed methane deoxidation space of the coalbed methane deoxidation device 1 through the coalbed methane outlet 13, and a one-way valve 14 is arranged 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 replenishment 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, which is a manganese-based or iron-based deoxidizer with coke as the carrier. 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. 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 replenishment port 7 for utilization. The deoxidizer recycling and regeneration device 3 and the deoxidizer preparation device 4 both directly adopt existing devices.

[0035] Further, a deoxidizer disperser 8 is arranged in the coalbed methane deoxidation space, and the deoxidizer disperser 8 is located below the deoxidizer inlet 6 and the deoxidizer replenishment port 7. As Figure 2 shown, the deoxidizer disperser 8 is supported by a triangular bracket, and both ends of the bracket are welded to the inner wall of the coalbed methane deoxidation device 1 and the outer wall of the coke oven gas passage 12 respectively. Specifically, the deoxidizer disperser 8 is composed of a circular platform with holes supported by a triangular bracket. When the deoxidizer falls from the deoxidizer inlet 6 and the deoxidizer replenishment 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 the periphery of 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 feed inlet 15 is arranged at the top of the side wall of the coal pyrolysis device 2. A stirrer 16 and a rotating grate 18 are arranged in the coal pyrolysis device 2. The upper layers of the stirrer 16 and the rotating grate 18 are connected as a whole through a rotating shaft. The stirrer 16 drives the grate and the stirring blades to rotate. The lowermost grate 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 bracket, and the grate support 20 is welded to the inner wall surface of the coal pyrolysis device 2.

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

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

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

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

[0042] (1) Coal materials enter the coal pyrolysis device 2 from the upper side inlets on both sides of the coal pyrolysis device 2. Under the action of the mixer, the coal burns and pyrolyzes sufficiently, releasing a large amount of heat. Coke and ash are discharged from the coke discharge port 17, and the coke oven gas is discharged upward through the coke oven gas passage 12. The discharged coke oven gas heats the coalbed methane deoxidation device 1 through the coke oven gas passage 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. The deoxidizer moves downward from top to bottom after passing through the deoxidizer disperser 8, contacts the rising low-concentration oxygen-containing coalbed methane, and then removes the oxygen in the coalbed methane; the coalbed methane after oxygen removal enters the coke oven gas passage 12 through the one-way valve 14 and is discharged together after converging with the coke oven gas generated by pyrolysis;

[0044] (3) The deoxidizer after deoxidation enters the deoxidizer circulation and regeneration device 3 from the deoxidizer outlet 11 on the bottom side of the coalbed methane deoxidation device 1. The regenerated deoxidizer re-enters the coalbed methane deoxidation device 1 through the deoxidizer inlets 6 on both sides of the upper center through a pipeline for cyclic use;

[0045] (4) Part of the coke discharged from the coke discharge port 17 enters the deoxidizer preparation device 4, and the prepared deoxidizer enters the coalbed methane deoxidation device 1 through the deoxidizer supply port 7 through a 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 the coal is fed from the top, the coal will accumulate in the coal pyrolysis device. The coal material at the bottom layer will contact air or oxygen and burn to generate high temperature, releasing a large amount of heat to provide sufficient energy for the system. The upper-layer 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 functions of the stirrer are, on the one hand, to disperse the coal added from the top evenly in the device, and on the other hand, to facilitate the dropping of the generated coke and ash under the stirring action. At the same time, under the stirring action, it is also convenient for the coal material at the lower layer to fully contact air or oxygen to generate more heat.

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

[0048] Further, in the step (2), the deoxidizer is a composite deoxidizer, a manganese-based or iron-based deoxidizer carried on coke. This step uses the waste heat of the coke oven gas generated by coal pyrolysis to provide heat for deoxidizing the coalbed methane, achieving deoxidation of the coalbed methane while utilizing the waste heat. At the same time, the main component of the deoxidized coalbed methane is methane, and methane is also one of the main components in the coke oven gas. Therefore, the deoxidized coalbed methane and the coke oven gas can be merged to enrich the methane component in the coke oven gas and can be utilized together later.

[0049] Further, for the coke and coke oven gas generated by coal pyrolysis, etc., the coke oven gas is generally used as the raw material gas for synthesizing other products or directly used as fuel gas after purification treatment, and the coke is generally used in multiple aspects such as metal smelting. In the step (4), the reason for preparing the deoxidizer using coke is that 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 the composite deoxidizer can not only reduce costs but also obtain a recyclable deoxidizer.

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

[0051] Example 2

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

[0053] Add the coal material into the coal pyrolysis device. The coal burns and pyrolyzes in the coal pyrolysis device, releasing heat. The 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 coalbed methane deoxidation device through the coke oven gas channel;

[0054] The oxygen-containing coalbed methane enters the coalbed methane deoxidation device and removes the oxygen in the coalbed methane under the action of the deoxidizer; the coalbed methane after oxygen removal enters the coke oven gas channel and is discharged together after merging with the coke oven gas generated by pyrolysis;

[0055] The deoxidized deoxidizer enters the deoxidizer regeneration device from the coalbed methane deoxidation device for reduction and regeneration, and the regenerated deoxidizer re-enters the coalbed methane deoxidation device for cyclic use;

[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 specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, they are 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 without creative efforts on the basis of the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. An integrated device for coal pyrolysis and deoxidation of coalbed methane, characterized in that, It includes a coalbed methane deoxidation device, a coal pyrolysis device, a deoxidizer circulation and regeneration device, and a deoxidizer preparation device. Among them, the coalbed methane deoxidation device is arranged above the coal pyrolysis device, and the coalbed methane deoxidation device and the coal pyrolysis device are of 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 after deoxidation by the coalbed methane deoxidation device is discharged through the coke oven gas channel. The space between the wall surface of the coalbed methane deoxidation device and the coke oven gas channel is the coalbed methane deoxidation space. A deoxidizer inlet and a deoxidizer supplement port are arranged at the top of the coalbed methane deoxidation 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 deoxidation device. The bottom end of the coke oven gas channel passes through the bottom of the coalbed methane deoxidation device and extends into the coal pyrolysis device, and the top end of the coke oven gas channel extends out from the top of the coalbed methane deoxidation device. 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 to the coalbed methane deoxidation space of the coalbed methane deoxidation device through the coalbed methane outlet, and a one-way valve is arranged at the coalbed methane outlet. 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 supplement 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 port of the coal pyrolysis device. A deoxidizer disperser is arranged in the coalbed methane deoxidation space, and the deoxidizer disperser is located below the deoxidizer inlet and the deoxidizer supplement port. A coal feed inlet is arranged at the top of the side wall of the coal pyrolysis device. A stirrer and a rotating grate are arranged in the coal pyrolysis device, and the rotating grate is supported by a grate support.

2. The integrated device for coal pyrolysis and coalbed methane deoxidation according to claim 1, characterized in that The motor of the stirrer is installed at the bottom of the rotating grate, the stirring blades of the stirrer are installed at the top of the rotating grate through a rotating shaft, and the rotating grate adopts a pagoda-shaped structure.

3. The integrated device for coal pyrolysis and coalbed methane deoxidation according to claim 1, characterized in that Heat insulation and thermal insulation materials are arranged on the exteriors of the coalbed methane deoxidation device and the coal pyrolysis device.

4. A working method of an integrated device for coal pyrolysis and coalbed methane deoxidation according to any one of claims 1-3, characterized in that, It includes the following steps: Add coal feed into the coal pyrolysis device. The coal burns and pyrolyzes in the coal pyrolysis device, releasing 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 coalbed methane deoxidation device through the coke oven gas channel. The oxygen-containing coalbed methane enters the coalbed methane deoxidation device and removes the oxygen in the coalbed methane under the action of the deoxidizer. The coalbed methane after oxygen removal enters the coke oven gas channel and is discharged together after converging with the coke oven gas generated by pyrolysis. The deoxidizer after deoxidation enters the deoxidizer regeneration device from the coalbed methane deoxidation device for reduction and regeneration. The deoxidizer after reduction and regeneration re-enters the coalbed methane deoxidation device for cyclic use. 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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