An underground coal mine gas-slag separation device

Abstract

The application discloses a coal mine underground gas residue separation device, relates to the technical field of gas residue separation, and comprises a base, a first tank body and a second tank body. Water for separating gas residue is filled in the first tank body, and an air inlet pipe and a first air outlet pipe are connected to the upper end of the side wall. A stirring mechanism is arranged in the first tank body to break bubbles so that solid residues and water are fully contacted. A conical collecting frame and a residue outlet pipe are connected to the lower end of the second tank body. An electric control gate valve is arranged at the residue outlet pipe. A circulating treatment mechanism is arranged on the second tank body to filter and replace the water in the first tank body. The application breaks the rising bubbles into small bubbles through the stirring mechanism, significantly increases the gas-water contact area, fully wets and settles the fine solid particles, realizes real-time filtration and recycling of the separating water through the circulating treatment mechanism, and realizes automatic residue discharge through the electric control gate valve, thereby effectively improving the completeness and reliability of the gas residue separation and reducing the consumption of water resources.

Description

Technical Field

[0001] This invention relates to the field of gas-slag separation technology, specifically a coal mine underground gas-slag separation device. Background Technology

[0002] During underground coal mine operations, large quantities of gas-slag mixtures containing solid particles are frequently generated during gas extraction, coal roadway excavation, and coal face operations. This mixture contains not only combustible gases such as methane but also solid particles like coal dust and rock fragments. Direct emission would cause air pollution and pose safety hazards such as gas explosions; while direct gas transportation or utilization would result in severe wear and blockage of pipelines, valves, and downstream equipment (such as gas generator sets), affecting system stability and equipment lifespan. Therefore, efficient separation of the gas-slag mixture in underground coal mines is a crucial preliminary step for ensuring safe production and realizing the resource utilization of gas.

[0003] Currently, the gas-slag separation methods commonly used in underground coal mines are mainly divided into two categories: dry separation and wet separation. Dry separation often uses cyclone dust collectors or gravity settling chambers to achieve gas-solid separation using centrifugal force and gravity. However, such equipment has low collection efficiency for fine dust (especially coal dust with a particle size of less than 10μm), and secondary dust is easily generated during the separation process, making it difficult to meet the purification requirements under high-concentration gas extraction conditions underground. Wet separation usually uses the principle of water bath dust removal or water film dust removal, which wets and settles solid particles through gas-water contact. However, existing wet separation devices generally have the following shortcomings: First, the bubble particle size is relatively large, and the gas-water contact area is limited, making it difficult for fine particles to be fully wetted and escape with the airflow, resulting in unsatisfactory separation efficiency; second, the separation water is mostly used once, resulting in large water consumption, making it difficult to operate continuously under conditions of limited underground water supply, and the direct discharge of slag-containing wastewater would increase the burden on water treatment. Summary of the Invention

[0004] The purpose of this invention is to provide a coal mine underground gas-slag separation device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A coal mine underground gas-slag separation device includes a base, a first tank fixedly connected to the upper end of the base, water for separating gas and slag being added inside the first tank, a water supply device connected to the upper end of the side wall of the first tank, an air inlet pipe fixedly connected to the upper end of the side wall of the first tank for feeding a gas-slag mixture into the first tank, an outlet pipe extending to the bottom of the first tank, a first outlet pipe connected to the upper end of the first tank for discharging the treated gas, and a device inside the first tank for breaking up air bubbles to bring the solid slag into contact with the water. The mixing mechanism includes a second tank vertically mounted above the base. A conical collecting frame is fixedly connected to the lower end of the second tank. A slag discharge pipe is vertically fixedly connected to the output end of the conical collecting frame. An electrically controlled gate valve is installed on the side of the slag discharge pipe away from the conical collecting frame. Several support columns are vertically fixedly connected to the side wall of the conical collecting frame. The lower ends of the support columns are fixedly connected to the upper end of the base. A second gas outlet pipe for discharging the treated gas is fixedly connected to the upper end of the second tank. A circulation treatment mechanism for filtering and replacing the water inside the first tank is provided on the second tank.

[0006] As a further aspect of the present invention: the stirring mechanism includes a motor, which is fixedly connected to the center of the upper end of the first tank. A rotating rod is fixedly connected to the output end of the motor. The end of the rotating rod away from the motor is rotatably connected to the bottom of the first tank. A stirring rod for stirring the water inside the first tank is fixedly connected to the side wall of the rotating rod.

[0007] As a further embodiment of the present invention: the circulating treatment mechanism includes a first water pump, which is fixedly connected to the lower end of the side wall of the first tank. The input end of the first water pump extends to the bottom of the first tank, and the output end of the first water pump is fixedly connected to a first water pipe. The other end of the first water pipe is fixedly connected to the lower end of the side wall of the second tank, and the first water pipe communicates with the interior of the second tank. A fixed cylinder is slidably and sealingly connected to the inner wall of the second tank. A filter cloth for pressing and filtering water is fixedly connected to the lower end of the fixed cylinder, and a support frame for supporting the filter cloth is fixedly connected to the upper end of the filter cloth. The fixed cylinder can block the output end of the first water pipe on its inner wall. Even when the fixed cylinder is moved to the bottom, the side wall of the fixed cylinder can still block the output end of the first water pipe. A second water pump is fixedly connected to the upper side wall of the first tank. The output end of the second water pump extends to the top of the first tank. A second water pipe is fixedly connected to the input end of the second water pump. The other end of the second water pipe passes through the side wall of the second tank and is fixedly connected to a suction hose. The other end of the suction hose is fixedly connected to the lower end of the inner wall of the fixed cylinder. A drive assembly for driving the support frame and the fixed cylinder to move back and forth is provided on the second tank.

[0008] As a further embodiment of the present invention: the driving component includes a pressure sensor, which is fixedly connected to the end of the support frame away from the filter cloth. A sliding rod is vertically fixedly connected to the measuring end of the pressure sensor. A connecting plate is fixedly connected to the end of the sliding rod away from the pressure sensor through the top of the second tank. An electric telescopic rod is vertically fixedly connected to the side wall of the second tank. The output end of the electric telescopic rod is fixedly connected to the lower end of the connecting plate. A controller is fixedly connected to the side wall of the second tank. A transparent observation window is fixedly connected to the lower end of the side wall of the second tank. A camera for observing the movement of the fixed cylinder is fixedly connected to the transparent observation window. The upper end of the transparent observation window is located below the output end of the first water pipe.

[0009] As a further embodiment of the present invention, the filter cloth comprises a reinforcing skeleton layer in the middle and filter layers on both sides. The reinforcing skeleton layer is made of stainless steel wire mesh, and the filter layers are woven from wear-resistant polyester fibers. Through this multi-layered composite structure, the reinforcing skeleton layer provides sufficient structural strength to resist the alternating stress generated by reciprocating filtration, extending the service life of the filter cloth. Simultaneously, the filter layers on both sides enable graded filtration of solid slag of different particle sizes, improving the clarity of the filtered water.

[0010] As a further aspect of the invention: several annular sealing grooves are formed on the outer wall of the fixed cylinder. A sealing ring, which slides and seals against the inner wall of the second tank, is embedded inside each annular sealing groove. The sealing ring has a Y-shaped cross-section, with the open end of the Y-shape facing inwards towards the second tank. By using the Y-shaped sealing ring, when the fixed cylinder is pressed down, the water pressure allows the lip of the sealing ring to fit more tightly against the inner wall of the second tank, achieving a self-tightening seal. This effectively prevents turbid water from flowing upwards through the gap between the fixed cylinder and the second tank, ensuring the sealing performance of the filtration process and the cleanliness of the clean water side.

[0011] As a further aspect of the invention: a shock-absorbing pad is fixedly connected at the connection between the support column and the base. The shock-absorbing pad is made of rubber material, and its interior has several vertically penetrating buffer holes. The diameter of the buffer holes gradually increases from the center of the shock-absorbing pad to the outer periphery. By using the shock-absorbing pad, the vibration energy transmitted to the base during the reciprocating motion of the electric telescopic rod and the filtration process can be effectively absorbed, reducing noise during device operation. Simultaneously, the variable diameter design of the buffer holes enables graded vibration reduction, providing good suppression of vibrations at different frequencies.

[0012] As a further aspect of the invention: a liquid level sensor is fixedly connected to the side wall of the first tank. The signal output terminal of the liquid level sensor is electrically connected to the signal input terminal of the controller. The controller controls the opening and closing of the water supply equipment based on the liquid level signal detected by the liquid level sensor. Through the automatic linkage between the liquid level sensor and the controller, when the water level in the first tank drops to the set lower limit due to evaporation or leakage in the circulation pipeline, the controller automatically turns on the water supply equipment to replenish water. When the water level recovers to the set upper limit, it automatically turns off, achieving fully automatic and precise control of the water level for separate water use, avoiding water shortage operation or overflow waste.

[0013] As a further aspect of the present invention: a wear-resistant liner is fixedly connected to the inner wall of the conical collecting frame, and the inner surface of the wear-resistant liner is provided with several slag-guiding grooves extending along the generatrix of the conical collecting frame. The wear-resistant liner effectively protects the main structure of the conical collecting frame from repeated impacts and friction from falling solid slag, preventing wear and perforation, significantly extending the service life of the equipment. Simultaneously, the slag-guiding grooves guide the slag to smoothly slide down the conical wall to the slag discharge pipe, preventing slag from accumulating on the conical surface and causing blockages.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention, by setting a stirring mechanism consisting of a motor, a rotating rod, and a stirring rod inside the first tank, can break up rising air bubbles into tiny bubbles, significantly increasing the contact area between gas and water. This allows the fine solid particles remaining in the bubbles to be fully wetted by water and settle, effectively preventing slag from floating with the gas, ensuring the cleanliness of the discharged gas, and greatly improving the thoroughness and reliability of gas-slag separation.

[0015] The system, consisting of a first water pump, a second water pump, a second tank, and a filter cloth, forms a circulating treatment mechanism that can filter the separated turbid water in real time and return the clean water to the top of the first tank. This achieves closed-loop recycling of the separated water, reducing water consumption and lowering production water costs and wastewater discharge pressure.

[0016] The fixed cylinder and filter cloth reciprocate under the drive of the electric telescopic rod. The pressure allows water to pass through the filter cloth quickly, while the solid residue is trapped and deposited in the conical collecting frame and the residue discharge pipe. The dewatering effect is good, the residue has a low moisture content, and it is convenient for subsequent transportation or disposal.

[0017] The pressure sensor monitors the pressure of the filter cloth in real time and transmits the signal to the controller. The controller automatically adjusts the stroke of the electric telescopic rod according to the preset threshold, which ensures that there is sufficient pressure for each filter press, while avoiding damage to the filter cloth or equipment due to excessive pressure, thus extending the service life of the device.

[0018] The displacement of the fixed cylinder is monitored in real time through a transparent observation window and a camera. When the slag accumulates and the resistance increases, the controller automatically opens the electrically controlled gate valve. The reciprocating downward action of the filter cloth slowly and quantitatively discharges the slag, avoiding the tedious operation of manual slag cleaning. In addition, the narrow diameter design of the slag discharge pipe makes the slag discharge process smooth and controllable, preventing blockage or pollution and ensuring the long-term continuous automated operation of the device. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the stirring mechanism in this invention.

[0021] Figure 3 This is a schematic diagram of the cyclic processing mechanism in this invention.

[0022] Figure 4 This is a schematic diagram of the internal structure of the fixed cylinder in this invention.

[0023] Figure 5 This is a schematic diagram of the transparent observation window in this invention.

[0024] The components include: 1. Base; 2. First water pipe; 3. First water pump; 4. First tank; 5. Air inlet pipe; 6. Motor; 7. First air outlet pipe; 8. Second water pump; 9. Second water pipe; 10. Connecting plate; 11. Sliding rod; 12. Second air outlet pipe; 13. Controller; 14. Second tank; 15. Camera; 16. Transparent observation window; 17. Conical collection frame; 18. Slag discharge pipe; 19. Electrically controlled gate valve; 20. Support column; 21. Rotating rod; 22. Stirring rod; 23. Water suction hose; 24. Fixed cylinder; 25. Electric telescopic rod; 26. Filter cloth; 27. Support frame; 28. Pressure sensor. Detailed Implementation

[0025] 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.

[0026] Please see Figures 1-5In this embodiment of the invention, a coal mine underground gas-slag separation device includes a base 1. A first tank 4 is fixedly connected to the upper end of the base 1. The first tank 4 is filled with water for separating gas and slag. The upper end of the side wall of the first tank 4 is connected to a water supply device. An air inlet pipe 5 for inputting a gas-slag mixture into the first tank 4 is fixedly connected to the upper end of the side wall of the first tank 4. The output end of the air inlet pipe 5 extends to the bottom of the first tank 4. A first air outlet pipe 7 for discharging treated gas is fixedly connected to the upper end of the first tank 4. A stirring mechanism for breaking up air bubbles and bringing solid slag into contact with water is provided inside the first tank 4. A second tank 14 is vertically mounted above the base 1. A conical collecting frame 17 is fixedly connected to the lower end of the second tank 14. A slag discharge pipe 18 is vertically fixedly connected to the output end of the conical collecting frame 17. An electrically controlled gate valve 19 is installed on the side of the slag discharge pipe 18 away from the conical collecting frame 17. Several support columns 20 are vertically fixedly connected to the side wall of the conical collecting frame 17. The lower end of the support column 20 is fixedly connected to the upper end of the base 1. A second gas outlet pipe 12 for discharging the treated gas is fixedly connected to the upper end of the second tank 14. A circulation treatment mechanism for filtering and replacing the water inside the first tank 4 is provided on the second tank 14.

[0027] The stirring mechanism includes a motor 6, which is fixedly connected to the center of the upper end of the first tank 4. A rotating rod 21 is fixedly connected to the output end of the motor 6. The end of the rotating rod 21 away from the motor 6 is rotatably connected to the bottom of the first tank 4. A stirring rod 22 for stirring the water inside the first tank 4 is fixedly connected to the side wall of the rotating rod 21.

[0028] When in use, the motor 6 is started, and the output end of the motor 6 drives the rotating rod 21 to rotate. The rotating rod 21 drives the stirring rod 22 to rotate, and the stirring rod 22 stirs the water inside the first tank 4. Since the solid residue also rotates, the air bubbles can be broken up better, allowing the solid residue to come into contact with the water. Through this stirring mechanism, the contact area between the gas and water is effectively increased, so that the solid particles in the air bubbles are fully wetted by water and settle down, which significantly improves the efficiency and thoroughness of gas-sludge separation. At the same time, it prevents the air bubbles from carrying the residue to float up, ensuring the cleanliness of the gas discharged from the first gas outlet pipe 7.

[0029] The circulating treatment mechanism includes a first water pump 3, which is fixedly connected to the lower end of the side wall of the first tank 4. The input end of the first water pump 3 extends to the bottom of the first tank 4, and the output end of the first water pump 3 is fixedly connected to a first water pipe 2. The other end of the first water pipe 2 is fixedly connected to the lower end of the side wall of the second tank 14, and the first water pipe 2 communicates with the interior of the second tank 14. A fixed cylinder 24 is slidably and sealingly connected to the inner wall of the second tank 14. A filter cloth 26 for pressing and filtering water is fixedly connected to the lower end of the fixed cylinder 24, and a support frame 27 for supporting the filter cloth 26 is fixedly connected to the upper end of the filter cloth 26. The support frame 27 is fixedly connected to the inner wall of the fixed cylinder 24. The fixed cylinder 24 can block the output end of the first water pipe 2, and when the fixed cylinder 24 moves to the lowest point, the side wall of the fixed cylinder 24 can still block the output end of the first water pipe 2. The upper end of the side wall of the first tank 4 is fixedly connected to the second water pump 8. The output end of the second water pump 8 extends to the top of the first tank 4. The input end of the second water pump 8 is fixedly connected to the second water pipe 9. The other end of the second water pipe 9 passes through the side wall of the second tank 14 and is fixedly connected to the suction hose 23. The other end of the suction hose 23 is fixedly connected to the lower end of the inner wall of the fixed cylinder 24. The second tank 14 is provided with a drive assembly for driving the support frame 27 and the fixed cylinder 24 to move back and forth.

[0030] The drive assembly includes a pressure sensor 28, which is fixedly connected to the end of the support frame 27 away from the filter cloth 26. A sliding rod 11 is vertically fixedly connected to the measuring end of the pressure sensor 28. A connecting plate 10 is fixedly connected to the end of the sliding rod 11 away from the pressure sensor 28 through the top of the second tank 14. An electric telescopic rod 25 is vertically fixedly connected to the side wall of the second tank 14. The output end of the electric telescopic rod 25 is fixedly connected to the lower end of the connecting plate 10. A controller 13 is fixedly connected to the side wall of the second tank 14. A transparent observation window 16 is fixedly connected to the lower end of the side wall of the second tank 14. A camera 15 for observing the movement of the fixed cylinder 24 is fixedly connected to the transparent observation window 16. The upper end of the transparent observation window 16 is located below the output end of the first water pipe 2.

[0031] In operation, the input end of the first water pump 3 draws in the turbid liquid inside the first tank 4. Then, the output end of the first water pump 3 delivers the liquid to the second tank 14 through the first water pipe 2. Simultaneously, the electric telescopic rod 25 is activated to extend reciprocally. The output end of the electric telescopic rod 25 drives the connecting plate 10 to move, the connecting plate 10 drives the sliding rod 11 to move, and the sliding rod 11 drives the pressure sensor 28, support frame 27, fixed cylinder 24, and filter cloth 26 to move. When the fixed cylinder 24 moves downward, under pressure, water passes through the filter cloth 26, achieving the separation of water and solid residue, and causing the solid residue to deposit inside the conical collecting frame 17 and the slag discharge pipe 18. At the same time, the pressure sensor 28 measures the downward pressure of the filter cloth 26 in real time. The data is transmitted to controller 13, which controls the electric telescopic rod 25 to ensure sufficient pressure on the filter cloth 26 each time it is pressed down. At the same time, the second water pump 8 is started. The input end of the second water pump 8 draws filtered water through the second water pipe 9 and the suction hose 23. Then, the output end of the second water pump 8 delivers the water back into the first tank 4. Through this circulation processing mechanism, real-time filtration and recycling of the separated water are realized, which greatly reduces water consumption. Meanwhile, the reciprocating filtration action of the filter cloth 26 ensures efficient dehydration and collection of solid residue. The cooperation between the pressure sensor 28 and the controller 13 ensures precise control of the filtration force, avoiding problems such as incomplete filtration due to insufficient pressure or damage to the equipment due to excessive pressure.

[0032] As a further aspect of the invention: the lower end of the base is fixedly connected to several traveling wheels to facilitate the movement of the device in underground coal mine roadways. These traveling wheels are omnidirectional wheels and have built-in brake locking mechanisms. A traction ring for connection to traction equipment is fixedly connected to the side wall of the base. Through the arrangement of the traveling wheels and traction rings, the entire gas-slag separation device can move flexibly and quickly into position underground in coal mines, enabling transfers between different work faces without the need for hoisting equipment. Simultaneously, the brake locking mechanism ensures the stable fixation of the device in its working position, preventing pipe detachment or safety accidents caused by accidental slippage of the equipment.

[0033] When a large amount of solid slag accumulates inside the conical collecting frame 17, the filter cloth 26, support frame 27, and fixed cylinder 24 cannot move downwards due to the obstruction of the solid slag. At this time, the camera 15 will capture the movement of the fixed cylinder 24 and transmit the data to the controller 13 for analysis. The controller 13 controls the electric gate valve 19 to open. Subsequently, due to the resistance formed by the narrow slag discharge pipe 18, each time the filter cloth 26, support frame 27, and fixed cylinder 24 move downwards, a portion of solid slag will be pushed out through the slag discharge pipe 18. Through the linkage control of this drive component with the camera 15 and the electric gate valve 19, the automatic detection and quantitative discharge of solid slag are realized, avoiding the tedious operation of manual slag cleaning and ensuring the continuous and stable operation of the device. At the same time, the narrow diameter design of the slag discharge pipe 18 makes the slag discharge process smooth and controllable, preventing a large amount of slag from rushing out instantly and causing blockage or pollution.

[0034] The working principle of this invention is as follows: First, the slag-containing gas is sent into the bottom of the first tank 4 through the air inlet pipe 5. The gas passes through the water added inside the tank. Since the density of solid slag is greater than that of water, most of the slag begins to sink under the action of gravity, while the gas forms bubbles and moves upward, completing the initial gas-solid separation.

[0035] Then, the motor 6 is started to drive the rotating rod 21 and the stirring rod 22 to rotate, continuously stirring the water in the first tank 4. The stirring action breaks the large bubbles into small bubbles, significantly increasing the contact area between the gas and the water, so that the fine solid particles remaining in the bubbles are fully wetted by the water and settle down, preventing them from floating with the gas, and ensuring that the gas discharged through the first gas outlet pipe 7 is clean.

[0036] At the same time, the first water pump 3 is started to extract the turbid water containing slag from the bottom of the first tank 4 and send it into the second tank 14 through the first water pipe 2. The electric telescopic rod 25 drives the fixed cylinder 24 and the filter cloth 26 to move up and down repeatedly through the connecting plate 10 and the sliding rod 11. When pressed down, the water passes through the filter cloth 26 under pressure to achieve solid-liquid separation. The separated clear water is stored above the fixed cylinder 24, while the solid slag is trapped below the filter cloth and gradually deposits into the conical collecting frame 17 and the slag discharge pipe 18.

[0037] Meanwhile, the second water pump 8 draws filtered clean water from inside the fixed cylinder 24, above the filter cloth, through the second water pipe 9 and the suction hose 23, and sends it back to the top of the first tank 4, realizing the recycling of separated water and greatly reducing water consumption.

[0038] The pressure sensor 28 monitors the pressure value of the filter cloth 26 in real time when it is pressed down, and transmits the signal to the controller 13. The controller adjusts the extension stroke of the electric telescopic rod 25 according to the preset pressure threshold to ensure that there is sufficient pressure for each filter press, while preventing excessive pressure from damaging the filter cloth or equipment.

[0039] When the solid slag in the conical collecting frame 17 accumulates to a certain amount, the downward pressure resistance of the fixed cylinder 24 increases. The camera 15 monitors the obstruction of the displacement of the fixed cylinder 24 through the transparent observation window 16 and transmits the image data to the controller 13. After the controller determines this, it automatically opens the electric gate valve 19 and the slag discharge pipe 18 opens to discharge slag. Since the diameter of the slag discharge pipe is relatively small, the slag discharge process is smooth and controllable. Moreover, each time the filter cloth is pressed down, it will push some slag out, realizing continuous and automatic slag cleaning without manual intervention.

[0040] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

Claims

1. A coal mine underground gas-slag separation device, comprising a base (1), wherein a first tank (4) is fixedly connected to the upper end of the base (1), the upper end of the side wall of the first tank (4) is connected to a water supply device, an air inlet pipe (5) is fixedly connected to the upper end of the side wall of the first tank (4), the output end of the air inlet pipe (5) extends to the bottom of the first tank (4), and a first air outlet pipe (7) is connected to the upper end of the first tank (4), characterized in that, The first tank (4) is equipped with a stirring mechanism inside. The second tank (14) is vertically arranged above the base (1). The lower end of the second tank (14) is fixedly connected to a conical collecting frame (17). The output end of the conical collecting frame (17) is vertically fixedly connected to a slag discharge pipe (18). An electric gate valve (19) is installed on the side of the slag discharge pipe (18) away from the conical collecting frame (17). Several support columns (20) are vertically fixedly connected to the side wall of the conical collecting frame (17). The lower end of the support column (20) is fixedly connected to the upper end of the base (1). The upper end of the second tank (14) is fixedly connected to a second gas outlet pipe (12) for discharging the treated gas. A circulation processing mechanism is provided on the second tank (14).

2. The coal mine underground gas-slag separation device according to claim 1, characterized in that, The stirring mechanism includes a motor (6), which is fixedly connected to the first tank (4). A rotating rod (21) is fixedly connected to the output end of the motor (6). The end of the rotating rod (21) away from the motor (6) is rotatably connected to the bottom of the first tank (4). A stirring rod (22) is fixedly connected to the side wall of the rotating rod (21).

3. The coal mine underground gas-slag separation device according to claim 1, characterized in that, The circulating treatment mechanism includes a first water pump (3), which is fixedly connected to the lower end of the side wall of the first tank (4). The input end of the first water pump (3) extends to the bottom of the first tank (4). The output end of the first water pump (3) is fixedly connected to a first water pipe (2). The other end of the first water pipe (2) is fixedly connected to the lower end of the side wall of the second tank (14). The first water pipe (2) communicates with the interior of the second tank (14). A fixed cylinder (24) is slidably connected to the inner wall of the second tank (14). A filter cloth (26) is fixedly connected to the lower end of the fixed cylinder (24). 6) The upper end is fixedly connected to a support frame (27), which is fixedly connected to the inner wall of the fixed cylinder (24). The upper end of the side wall of the first tank (4) is fixedly connected to a second water pump (8). The output end of the second water pump (8) extends to the top of the first tank (4). The input end of the second water pump (8) is fixedly connected to a second water pipe (9). The other end of the second water pipe (9) passes through the side wall of the second tank (14) and is fixedly connected to a water suction hose (23). The other end of the water suction hose (23) is fixedly connected to the lower end of the inner wall of the fixed cylinder (24). The second tank (14) is provided with a drive assembly.

4. A coal mine underground gas-slag separation device according to claim 3, characterized in that, The drive assembly includes a pressure sensor (28), which is fixedly connected to the end of the support frame (27) away from the filter cloth (26). The measuring end of the pressure sensor (28) is vertically fixedly connected to a slide rod (11). The end of the slide rod (11) away from the pressure sensor (28) passes through the top of the second tank (14) and is fixedly connected to a connecting plate (10). An electric telescopic rod (25) is vertically fixedly connected to the side wall of the second tank (14). The output end of the electric telescopic rod (25) is fixedly connected to the lower end of the connecting plate (10). A controller (13) is fixedly connected to the side wall of the second tank (14). A transparent observation window (16) is fixedly connected to the lower end of the side wall of the second tank (14). A camera (15) is fixedly connected to the transparent observation window (16).

5. A coal mine underground gas-slag separation device according to claim 3, characterized in that, The filter cloth (26) includes a reinforcing skeleton layer in the middle layer and filter layers on both sides. The reinforcing skeleton layer is made of stainless steel wire mesh, and the filter layers are woven from wear-resistant polyester fibers.

6. A coal mine underground gas-slag separation device according to claim 3, characterized in that, The outer wall of the fixed cylinder (24) is provided with several annular sealing grooves. The annular sealing grooves are fitted with sealing rings that slide and seal with the inner wall of the second tank (14). The sealing rings have a Y-shaped cross-section, and the open end of the Y-shaped structure faces the inside of the second tank (14).

7. A coal mine underground gas-slag separation device according to claim 1, characterized in that, A shock-absorbing pad is fixedly connected at the connection between the support column (20) and the base (1), and the shock-absorbing pad has several buffer holes that penetrate vertically inside, with the diameter of the buffer holes gradually increasing from the center of the shock-absorbing pad to the outer periphery.

8. A coal mine underground gas-slag separation device according to claim 4, characterized in that, A liquid level sensor is fixedly connected to the side wall of the first tank (4). The signal output terminal of the liquid level sensor is electrically connected to the signal input terminal of the controller (13). The controller (13) controls the opening and closing of the water supply equipment according to the liquid level signal detected by the liquid level sensor.

9. A coal mine underground gas-slag separation device according to claim 1, characterized in that, The inner wall of the conical collecting frame (17) is fixedly connected with a wear-resistant liner, and the inner surface of the wear-resistant liner is provided with several slag-guiding grooves extending along the generatrix of the conical collecting frame.

Images