Mine air treatment and recovery device

Abstract

The invention discloses a mine air treatment and recovery device, and relates to the technical field of mine air recovery equipment, the mine air treatment and recovery device comprises a switch cover body assembly, an air extraction purification device and a separation device, the switch cover body assembly can be connected to an upper end opening of the air extraction purification device in an opening and closing manner, and a lower end outlet of the air extraction purification device is connected with an upper end inlet of the separation device; a purification adsorption layer is arranged in the air extraction purification device, an air discharge device and an adsorption layer release device are arranged below the purification adsorption layer, the air discharge device is used for discharging air in the air extraction purification device, and the adsorption layer release device is used for extracting methane and carbon dioxide adsorbed in the purification adsorption layer; a gas filtering layer is arranged in the separation device and divides the separation device into a methane collecting cavity and a carbon dioxide collecting cavity, the methane collecting cavity is communicated with a methane collecting tank, and the carbon dioxide collecting cavity is communicated with a carbon dioxide collecting tank. According to the invention, methane and carbon dioxide in mine air can be separated and respectively collected.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mine air recovery equipment, in particular to a mine air treatment and recovery device. BACKGROUND

[0002] The carbon dioxide fracturing technology utilizes the characteristics of liquid carbon dioxide vaporizing instantaneously after being heated and gas expanding, which can effectively crack the coal seam and increase the permeability of the coal seam. Meanwhile, carbon dioxide can displace methane in the coal seam and improve the gas extraction rate.

[0003] However, the use of carbon dioxide fracturing technology in large quantities will increase the concentration of methane and carbon dioxide in the mine air, which may increase the emission of greenhouse gases. The existing mine roadway air recovery device is not popular, and the existing mine roadway air recovery device cannot separately recover methane and carbon dioxide in the roadway.

[0004] Therefore, there is an urgent need in the art for a new mine air treatment and recovery device to solve the above problems. SUMMARY

[0005] The purpose of the present application is to provide a mine air treatment and recovery device to solve the problems existing in the prior art, which can separate methane and carbon dioxide in the mine air and separately recover methane and carbon dioxide.

[0006] To achieve the above purpose, the present application provides the following scheme:

[0007] The present application discloses a mine air treatment and recovery device, comprising a switch cover assembly, an air extraction and purification device and a separation device arranged in sequence from top to bottom, the switch cover assembly being capable of being connected to the upper end opening of the air extraction and purification device, and the lower end outlet of the air extraction and purification device being connected to the upper end inlet of the separation device.

[0008] The air extraction and purification device is provided with a purification adsorption layer, which can adsorb methane and carbon dioxide in the air, and the lower part of the purification adsorption layer is provided with an air discharge device and an adsorption layer release device, the air discharge device being used for discharging air in the air extraction and purification device, and the adsorption layer release device being used for extracting methane and carbon dioxide adsorbed in the purification adsorption layer.

[0009] The separation device is provided with a gas filter layer, which divides the separation device into a methane collection cavity and a carbon dioxide collection cavity, carbon dioxide entering the separation device can pass through the gas filter layer and enter the carbon dioxide collection cavity, and methane entering the separation device stays in the methane collection cavity, the methane collection cavity being connected to a methane collection tank, and the carbon dioxide collection cavity being connected to a carbon dioxide collection tank.

[0010] Preferably, the switch cover assembly comprises a lifting cover, and a lifting telescopic device is fixed on the air extraction and purification device, and a telescopic end of the lifting telescopic device is fixedly connected with a lower surface of the lifting cover.

[0011] Preferably, the switch cover assembly is provided with a methane concentration monitoring device and a temperature and humidity monitoring device.

[0012] Preferably, the purification adsorption layer comprises a fixed net bag, and activated carbon particles are loaded on the fixed net bag, and the pore size of the fixed net bag is smaller than the particle diameter of the activated carbon particles, and a plurality of net bag hooks are arranged on the inner wall of the air extraction and purification device, and the fixed net bag is hung on the net bag hooks.

[0013] Preferably, the air exhaust device and the adsorption layer release device are both negative pressure fans.

[0014] The air inlet of the air exhaust device is in communication with the inside of the air extraction and purification device, and the air outlet of the air exhaust device is in communication with the outside atmosphere.

[0015] The air inlet of the adsorption layer release device is in communication with the inside of the air extraction and purification device, and the air outlet of the adsorption layer release device is arranged towards the lower end outlet of the air extraction and purification device.

[0016] Preferably, the lower end outlet of the air extraction and purification device is provided with a leakage-proof net.

[0017] Preferably, the gas filter layer is a zeolite molecular sieve membrane.

[0018] Preferably, the methane collection cavity is in communication with the methane collection tank through a methane collection pipe, and the methane collection pipe is connected with a first branch pipe in parallel, and a first waste gas treatment box is connected to one end of the first branch pipe away from the methane collection pipe.

[0019] The carbon dioxide collection cavity is in communication with the carbon dioxide collection tank through a carbon dioxide collection pipe, and the carbon dioxide collection pipe is connected with a second branch pipe, and a second waste gas treatment box is connected to one end of the second branch pipe away from the carbon dioxide collection pipe.

[0020] Preferably, the air extraction and purification device is connected with a first gas detection device through a first gas detection pipe, and the first gas detection pipe is in communication with a cavity above the purification adsorption layer; the methane collection cavity is connected with a second gas detection device through a second gas detection pipe; and the carbon dioxide collection cavity is connected with a third gas detection device through a third gas detection pipe.

[0021] Preferably, the lower end of the air extraction and purification device is inserted into the upper end of the separation device, and a sealing device is arranged between the lower end of the air extraction and purification device and the upper end of the separation device.

[0022] The present application has the following technical effects relative to the prior art:

[0023] When not working, the switch cover assembly can ensure the sealing of the whole device. When working, only the switch cover assembly needs to be opened, and the external air is introduced into the device by the air discharge device. Most of the methane and carbon dioxide in the air are adsorbed by the purification adsorption layer, and the remaining most of the air is discharged to the atmosphere from the air discharge device. Then, the switch cover assembly is closed, and the methane and carbon dioxide in the purification adsorption layer are extracted by the adsorption layer release device, thereby realizing the purification of the gas. The extracted methane and carbon dioxide enter the separation device, and the gas filter layer in the separation device separates the methane and carbon dioxide, and finally the methane is transported to the methane collection tank, and the carbon dioxide is collected into the carbon dioxide collection tank. Subsequently, the methane and carbon dioxide in the methane collection tank and the carbon dioxide collection tank can be transported to the required place for use according to actual needs, thereby realizing the technical effects of recycling and reusing the air in the mine. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0025] Figure 1 FIG. 1 is a structural schematic view of the switch cover assembly in the mine air treatment and recovery device according to the present application;

[0026] Figure 2 FIG. 2 is an internal schematic view of the air extraction and purification device in the mine air treatment and recovery device according to the present application;

[0027] Figure 3 FIG. 3 is an internal schematic view of the separation device in the mine air treatment and recovery device according to the present application;

[0028] In the diagram: 1-Switch cover assembly; 101-Lifting cover; 102-Methane concentration monitoring device; 103-Temperature and humidity monitoring device; 2-Gas extraction and purification device; 201-Purification adsorption layer; 202-Air emission device; 203-Adsorption layer release device; 204-Fixing net; 205-Net hook; 206-Leakage prevention net; 3-Separation device; 301-Gas filter layer; 302-Methane collection chamber; 303-Carbon dioxide collection chamber; 304-Methane collection tank; 305-Carbon dioxide collection tank; 306-First waste gas treatment box; 307-Second waste gas treatment box. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] The purpose of this invention is to provide a mine air treatment and recovery device to solve the problems existing in the prior art, which can separate methane and carbon dioxide in mine air and recover them separately.

[0031] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] like Figures 1-3 As shown, this embodiment provides a mine air treatment and recovery device, including a switch cover assembly 1, an air extraction and purification device 2, and a separation device 3 arranged sequentially from top to bottom. The switch cover assembly 1 is openable and closed to the upper opening of the air extraction and purification device 2. When the switch cover assembly 1 is closed to the upper opening of the air extraction and purification device 2, the device is in a sealed state, and the inside and outside of the device are not connected. If it is necessary to extract outside air, the switch cover assembly 1 must be opened. The lower outlet of the air extraction and purification device 2 is connected to the upper inlet of the separation device 3, allowing the purified gas in the air extraction and purification device 2 to enter the separation device 3. Of course, a control valve can be installed at the lower outlet of the air extraction and purification device 2 or the upper inlet of the separation device 3 to control the flow of gas.

[0033] The air extraction and purification device 2 is provided with a purification adsorption layer 201, which can adsorb methane and carbon dioxide in the air. The purification adsorption layer 201 is provided below with an air discharge device 202 and an adsorption layer release device 203. The air discharge device 202 is used to discharge the air in the air extraction and purification device 2 to the outside atmosphere. Since the air in the air extraction and purification device 2 is discharged, the internal pressure is reduced, so that the outside air can be sucked into the air extraction and purification device 2. Therefore, the air discharge device 202 also has the function of sucking the outside air into the air extraction and purification device 2 when the switch cover assembly 1 is opened. The adsorption layer release device 203 is used to extract the methane and carbon dioxide adsorbed in the purification adsorption layer 201.

[0034] The separation device 3 is provided with a gas filter layer 301, which divides the separation device 3 into a methane collection cavity 302 and a carbon dioxide collection cavity 303. The methane collection cavity 302 is located above the gas filter layer 301, and the carbon dioxide collection cavity 303 is located below the gas filter layer 301. The carbon dioxide entering the separation device 3 can pass through the gas filter layer 301 and enter the carbon dioxide collection cavity 303. The methane entering the separation device 3 cannot pass through the gas filter layer 301, so it stays in the methane collection cavity 302. The methane collection cavity 302 is connected to a methane collection tank 304, and the methane in the methane collection cavity 302 will be collected into the methane collection tank 304. The carbon dioxide collection cavity 303 is connected to a carbon dioxide collection tank 305, and the carbon dioxide in the carbon dioxide collection cavity 303 will eventually be collected into the carbon dioxide collection tank 305.

[0035] When the air recovery work is carried out, the switch cover assembly 1 is opened first, and the air exhaust device 202 is started, which is used to exhaust the air in the air extraction and purification device 2 to the outside atmosphere, so that the air pressure in the air extraction and purification device 2 is reduced, so that the outside air is sucked into the air extraction and purification device 2. When the outside air enters the air extraction and purification device 2, it will contact the purification adsorption layer 201, which can adsorb the methane and carbon dioxide in the air, and the remaining gas in the air will pass through the purification adsorption layer 201 and be discharged to the outside atmosphere again under the action of the air exhaust device 202, During this period, the control valve at the lower end outlet of the air extraction and purification device 2 or the upper end inlet of the separation device 3 is in a closed state, so as to avoid a large amount of air directly entering the separation device 3 and increasing the working burden of the separation device 3. When the purification adsorption layer 201 adsorbs for a period of time, the air exhaust device 202 and the switch cover assembly 1 can be closed, and then the adsorption layer release device 203 and the control valve at the lower end outlet of the air extraction and purification device 2 or the upper end inlet of the separation device 3 are opened. The methane and carbon dioxide in the purification adsorption layer 201 are extracted and transported to the separation device 3 by the adsorption layer release device 203. When the methane and carbon dioxide enter the separation device 3, the carbon dioxide will pass through the gas filter layer 301, enter the carbon dioxide collection cavity 303 and finally enter the carbon dioxide collection tank 305 for storage. Since the methane cannot pass through the gas filter layer 301, it can only stay in the methane collection cavity 302 and finally be collected into the methane collection tank 304. Thus, the separation and separate collection of methane and carbon dioxide in the mine roadway air is completed.

[0036] The methane collection tank 304 that collects methane can be subsequently transported to the field of energy production or chemical synthesis, etc., to provide methane gas for it. The carbon dioxide collection tank 305 can be connected to the existing carbon dioxide liquefaction equipment (including but not limited to carbon dioxide compressor), which can convert gaseous carbon dioxide into liquid carbon dioxide, and then transport the liquid carbon dioxide to the filling machine of the carbon dioxide fracturing device (this is a prior art), and then use the filling machine to inject the liquid carbon dioxide into the carbon dioxide fracturing device, thereby realizing the recycling of carbon dioxide.

[0037] In this embodiment, as Figure 1As shown, the switch cover assembly 1 includes a lifting cover 101, and a lifting telescopic device is fixed on the air extraction and purification device 2. The lifting telescopic device can be selected from existing hydraulic cylinders, air cylinders or electric cylinders, etc. with telescopic function. The telescopic end of the lifting telescopic device is fixedly connected with the lower surface of the lifting cover 101, and the fixed end of the lifting telescopic device is fixed in the air extraction and purification device 2 through a fixed frame. Of course, in order to ensure the stability of the lifting of the lifting cover 101, multiple lifting telescopic devices can be arranged. In this way, only the telescopic movement of the lifting telescopic device is controlled to drive the lifting cover 101 to rise or fall, so as to realize the opening or closing effect of the lifting cover 101.

[0038] In the embodiment, the switch cover assembly 1 is provided with a methane concentration monitoring device 102 and a temperature and humidity monitoring device 103. The methane concentration monitoring device 102 can adopt an existing methane concentration monitoring alarm or methane concentration sensor, and the methane concentration in the mine tunnel can be monitored in real time through the methane concentration monitoring device 102. When the concentration is too high, the staff can be reminded in time to avoid danger caused by too high methane concentration. The temperature and humidity monitoring device 103 can adopt an existing temperature and humidity sensor, and the temperature and humidity in the tunnel can be detected in real time through the temperature and humidity monitoring device 103. The temperature and humidity monitoring device 103 and the methane concentration monitoring device 102 can be electrically connected with the controller, for transmitting the detection data to the controller in real time. The controller can adopt an existing control panel, and the related monitoring data can be displayed through the control panel for reminding the staff.

[0039] In the embodiment, the purification adsorption layer 201 is provided with at least one layer. When the purification adsorption layer 201 is provided with two or more layers, each purification adsorption layer 201 is distributed upward and downward. The purification adsorption layer 201 includes a fixed mesh bag 204, and the fixed mesh bag 204 is provided with activated carbon particles. The activated carbon particles can effectively adsorb methane and carbon dioxide in the air. The pore size of the fixed mesh bag 204 is smaller than the particle diameter of the activated carbon particles, so that the activated carbon particles can be prevented from falling out of the fixed mesh bag 204. In order to fix the fixed mesh bag 204, a plurality of mesh bag hooks 205 are arranged on the inner wall of the air extraction and purification device 2, and each corner of the fixed mesh bag 204 is hung on each mesh bag hook 205.

[0040] In the embodiment, the air discharge device 202 and the adsorption layer release device 203 are both existing negative pressure fans.

[0041] The air inlet of the air discharge device 202 is connected with the inside of the air extraction and purification device 2, and the air outlet of the air discharge device 202 is connected with the outside atmosphere, so that the air in the air extraction and purification device 2 can be extracted to the outside atmosphere.

[0042] The air inlet of the adsorption layer releasing device 203 is connected to the interior of the air extraction and purification device 2 and is arranged towards the purification adsorption layer 201, and the air outlet of the adsorption layer releasing device 203 is arranged towards the lower end outlet of the air extraction and purification device 2, and the adsorption layer releasing device 203 is used to extract the adsorbed methane and carbon dioxide in the purification adsorption layer 201 and guide them to the lower end outlet of the air extraction and purification device 2.

[0043] In this embodiment, the lower end outlet of the air extraction and purification device 2 is provided with a leakage prevention net 206, the aperture of the leakage prevention net 206 is smaller than the minimum diameter of the activated carbon particles, and the leakage prevention net 206 is arranged to avoid the activated carbon particles in the air extraction and purification device 2 from falling into the separation device 3.

[0044] In this embodiment, the gas filter layer 301 uses an existing zeolite molecular sieve film, the aperture of the zeolite molecular sieve film is smaller than the diameter of the methane molecule and larger than the diameter of the carbon dioxide molecule, so that the carbon dioxide can pass through the zeolite molecular sieve film and enter the carbon dioxide collection cavity 303, and the methane cannot pass through the zeolite molecular sieve film and thus stays in the methane collection cavity 302.

[0045] In this embodiment, the methane collection cavity 302 is connected to the methane collection tank 304 through a methane collection pipe, the methane collection pipe is connected with a first branch pipe, the first branch pipe is connected with the first waste gas treatment box 306 at an end away from the methane collection pipe, and a control valve is arranged on the methane collection pipe and the first branch pipe.

[0046] Similarly, the carbon dioxide collection cavity 303 is connected to the carbon dioxide collection tank 305 through a carbon dioxide collection pipe, the carbon dioxide collection pipe is connected with a second branch pipe, the second branch pipe is connected with the second waste gas treatment box 307 at an end away from the carbon dioxide collection pipe, and a control valve is arranged on the carbon dioxide collection pipe and the second branch pipe.

[0047] The first waste gas treatment box 306 and the second waste gas treatment box 307 are both provided with activated carbon particles for absorbing the methane and carbon dioxide in the air.

[0048] When the purified methane and carbon dioxide mixed gas enters the separation device 3, the air not adsorbed by the adsorption layer 201 in the air extraction and purification device 2 is first introduced, at this time, the control valves on the methane collection pipe and the carbon dioxide collection pipe can be closed first, and the control valves on the first branch pipe and the second branch pipe are opened, so that the air first introduced into the separation device 3 will enter the first waste gas treatment tank 306 and the second waste gas treatment tank 307, and after a period of time, the air first introduced into the separation device 3 is basically exhausted. Then, the control valves on the first branch and the second branch are closed, and the control valves on the methane collection pipe and the carbon dioxide collection pipe are opened, and under the separation action of the gas filtering layer 301, the methane will finally be collected in the methane collection tank 304, and the carbon dioxide will finally be collected in the carbon dioxide collection tank 305.

[0049] When the gas collection work is completed, the activated carbon particles in the first waste gas treatment tank 306 and the second waste gas treatment tank 307 can also be placed on the fixed net bag 204 in the purification adsorption layer 201, and the methane and carbon dioxide therein are sucked out by using the adsorption layer release device 203, so as to be collected again in the separation device 3. In this way, the waste of methane and carbon dioxide can be effectively reduced.

[0050] In the present embodiment, the air extraction and purification device 2 is connected with a first gas detection device through a first gas detection pipe, the first gas detection pipe is in communication with the cavity above the purification adsorption layer 201, and the first gas detection device can effectively measure the gas content of the methane and carbon dioxide introduced into the air extraction and purification device 2.

[0051] The methane collection cavity 302 is connected with a second gas detection device through a second gas detection pipe, and the second gas detection device can effectively measure the methane content in the methane collection cavity 302. The methane content measured by the second gas detection device is compared with the methane content measured by the first gas detection device, if the two methane contents are closer, the adsorption capacity of the purification adsorption layer 201 is better, if the methane content measured by the second gas detection device is much smaller than the methane content measured by the first gas detection device, the activated carbon particles in the purification adsorption layer 201 are invalid, and should be replaced in time.

[0052] The carbon dioxide collection cavity 303 is connected with a third gas detection device through a third gas detection pipe, if the more methane is detected in the third gas detection device, the blocking efficiency of the zeolite molecular sieve membrane to methane is worse, and the zeolite molecular sieve membrane should be replaced in time, if there is almost no methane, the blocking effect of the zeolite molecular sieve membrane to methane is better, and there is no need to replace it.

[0053] The first gas detection device, the second gas detection device and the third gas detection device can all be existing gas chromatographs.

[0054] In this embodiment, the lower end of the air extraction and purification device 2 is inserted into the upper end of the separation device 3. It is understood that the upper end of the separation device 3 is provided with a corresponding groove for the lower end of the air extraction and purification device 2. This arrangement facilitates the installation and disassembly of the two devices. A sealing device is arranged between the lower end of the air extraction and purification device 2 and the upper end of the separation device 3, thereby improving the sealing of the two devices. The sealing device can be a gasket or a sealing ring.

[0055] In the description of the present application, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used for the purpose of facilitating the description of the present application, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Therefore, the features defined as "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified and limited, the term "mounting" "connecting" "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0056] In the description of the present application, unless otherwise specified and limited, the terms "mounting" "connecting" "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0057] If the present application discloses or involves parts or structural elements that are fixedly connected to each other, unless otherwise stated, the fixed connection can be understood as: detachable fixed connection (for example, connected by bolts or screws), or as: non-detachable fixed connection (for example, riveting, welding), of course, the fixed connection can also be replaced by an integral structure (for example, manufactured by integral forming process) (except for obvious cases that cannot be replaced by integral forming process).

[0058] In addition, the terms used to represent the positional relationship or shape in any technical solution disclosed by the present application include states or shapes that are approximately, similar or close to them, unless otherwise stated.

[0059] Any component provided by the present application can be assembled from multiple individual components or can be a single component manufactured by one-piece forming process.

[0060] It should be understood that the structure, proportion, size, etc. shown in the drawings of the present application are only used to illustrate the content disclosed in the present application, to be understood and read by those skilled in the art, and are not used to limit the conditions for implementing the present application, and therefore do not have technical significance. Any modification of the structure, change of the proportion relationship, or adjustment of the size, without affecting the effects and purposes that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application.

[0061] It should be further noted that the same reference signs in the embodiments of the present application represent the same component or the same part.

[0062] Any adaptive change according to actual needs is within the protection scope of the present application.

[0063] The principles and implementation modes of the present application are described by using specific examples in the present application. The above description of the embodiments is only used to help understand the method of the present application and its core idea; at the same time, for those skilled in the art, according to the idea of the present application, the specific implementation mode and application scope will be changed. In conclusion, the content of the present application should not be understood as a limitation of the present application.

Claims

1. A mine air treatment and recovery device, characterized in that: The device includes a switch cover assembly (1), an air extraction and purification device (2), and a separation device (3) arranged sequentially from top to bottom. The switch cover assembly (1) is openable and connected to the upper opening of the air extraction and purification device (2), and the lower outlet of the air extraction and purification device (2) is connected to the upper inlet of the separation device (3). The extraction and purification device (2) is provided with a purification adsorption layer (201), which can adsorb methane and carbon dioxide in the air. Below the purification adsorption layer (201) are an air discharge device (202) and an adsorption layer release device (203). The air discharge device (202) is used to discharge the air in the extraction and purification device (2), and the adsorption layer release device (203) is used to extract the methane and carbon dioxide adsorbed in the purification adsorption layer (201). The separation device (3) is provided with a gas filter layer (301), which divides the separation device (3) into a methane collection chamber (302) and a carbon dioxide collection chamber (303). Carbon dioxide entering the separation device (3) can pass through the gas filter layer (301) and enter the carbon dioxide collection chamber (303). Methane entering the separation device (3) stays in the methane collection chamber (302). The methane collection chamber (302) is connected to the methane collection tank (304), and the carbon dioxide collection chamber (303) is connected to the carbon dioxide collection tank (305).

2. The mine air treatment and recovery device according to claim 1, characterized in that: The switch cover assembly (1) includes a lifting cover (101), and a lifting telescopic device is fixed on the gas extraction and purification device (2). The telescopic end of the lifting telescopic device is fixedly connected to the lower surface of the lifting cover (101).

3. The mine air treatment and recovery device according to claim 1, characterized in that: The switch cover assembly (1) is equipped with a methane concentration monitoring device (102) and a temperature and humidity monitoring device (103).

4. The mine air treatment and recovery device according to claim 1, characterized in that: The purification and adsorption layer (201) includes a fixed net bag (204), on which activated carbon particles are loaded. The pore size of the fixed net bag (204) is smaller than the particle diameter of the activated carbon particles. The inner wall of the gas extraction and purification device (2) is provided with several net bag hooks (205), and the fixed net bag (204) is hung on the net bag hooks (205).

5. The mine air treatment and recovery device according to claim 1, characterized in that: Both the air emission device (202) and the adsorption layer release device (203) are negative pressure fans; The air inlet of the air emission device (202) is connected to the interior of the air extraction and purification device (2), and the air outlet of the air emission device (202) is connected to the outside atmosphere. The air inlet of the adsorption layer release device (203) is connected to the interior of the extraction and purification device (2), and the air outlet of the adsorption layer release device (203) is set towards the lower outlet of the extraction and purification device (2).

6. The mine air treatment and recovery device according to claim 1, characterized in that: The lower outlet of the gas extraction and purification device (2) is equipped with a leak-proof net (206).

7. The mine air treatment and recovery device according to claim 1, characterized in that: The gas filter layer (301) is a zeolite molecular sieve membrane.

8. The mine air treatment and recovery device according to claim 1, characterized in that: The methane collection chamber (302) is connected to the methane collection tank (304) through a methane collection pipe. The methane collection pipe is connected in parallel with a first branch pipe. The end of the first branch pipe away from the methane collection pipe is connected to a first waste gas treatment box (306). The carbon dioxide collection chamber (303) is connected to the carbon dioxide collection tank (305) through a carbon dioxide collection pipe. A second branch pipe is connected to the carbon dioxide collection pipe, and the end of the second branch pipe away from the carbon dioxide collection pipe is connected to a second waste gas treatment box (307).

9. The mine air treatment and recovery device according to claim 1, characterized in that: The gas extraction and purification device (2) is connected to a first gas detection device through a first gas detection tube, and the first gas detection tube is connected to the cavity above the purification adsorption layer (201); the methane collection chamber (302) is connected to a second gas detection device through a second gas detection tube; and the carbon dioxide collection chamber (303) is connected to a third gas detection device through a third gas detection tube.

10. The mine air treatment and recovery device according to claim 1, characterized in that: The lower end of the gas extraction and purification device (2) is inserted into the upper end of the separation device (3), and a sealing device is provided between the lower end of the gas extraction and purification device (2) and the upper end of the separation device (3).

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