Coal bed gas particulate matter filtering device

Abstract

The invention discloses a coal bed gas particulate matter filtering device, and belongs to the field of coal bed gas, the filtering device comprises a box body, an air inlet pipe arranged at one end of the box body, an air outlet pipe arranged at the other end of the box body and communicated with the air inlet pipe, and a filter screen arranged in the air inlet pipe; a bent pipe communicated with the air inlet pipe and the air outlet pipe is arranged on the box body; the box body is provided with a purging structure used for purging pulverized coal particles adsorbed to the lower end of the filter screen. The blowing structure comprises an air collecting pipe inserted into the bent pipe, an air capturing pipe which is fixedly arranged at one end, close to the air inlet pipe, of the air collecting pipe and is used for capturing gas, a microporous aeration pipe which is arranged on the air inlet pipe and corresponds to the lower end of the filter screen, and connecting pipes which are arranged at two ends of the air collecting pipe and are communicated with the microporous aeration pipe. The pulverized coal particles at the lower end of the filter screen can be purged through the purging structure, the aggregation degree of the pulverized coal particles is reduced, the filtering efficiency is improved, frequent cleaning of the filter screen is reduced, and the service life of the filter screen is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of coalbed methane, and in particular to a coalbed methane particle filtering device. Background Art

[0002] Coalbed methane, a hydrocarbon gas with methane as its main component, is a mineral resource associated with coal and has important economic value. However, in the process of coalbed methane mining and collection, the mixing of coal powder particles has become a problem that cannot be ignored. These coal powder particles may not only damage production equipment such as compressors, cause failures, and reduce production efficiency, but also affect the normal transportation of coalbed methane, resulting in poor ventilation.

[0003] At present, the widely used method for filtering coal dust particles in coalbed methane is to use a filter box with a filter screen. However, after long-term operation of this filtering method, a large amount of coal dust particles often adhere to the air inlet side of the filter screen, causing the filter screen to be blocked and the ventilation capacity to decrease. In order to solve this problem, the prior art usually adopts a convenient and quick-disassembly design of the filter screen so that the filter screen can be disassembled and cleaned regularly.

[0004] Although the convenient quick-disassembly design can alleviate the problem of filter clogging to a certain extent, it still has obvious limitations. First, manual removal and cleaning of the filter must be carried out when the equipment is shut down, which will undoubtedly affect the continuous operation of the production line and reduce production efficiency. Secondly, since the filter is inconvenient to clean during gas transportation, the adsorption and accumulation time of coal powder particles on the filter cannot be effectively extended, resulting in too high a cleaning frequency of the filter, which increases maintenance costs and labor intensity.

[0005] Therefore, the present application provides a coalbed methane particulate matter filtering device to solve the above-mentioned problems. Summary of the invention

[0006] The present application provides a coal bed gas particle filtering device, which aims to solve the problem in the background technology that the existing manual disassembly and cleaning of the filter must be carried out when the equipment is shut down, which will undoubtedly affect the continuous operation of the production line and reduce production efficiency. Secondly, since the filter is inconvenient to clean during gas transportation, the adsorption and accumulation time of coal powder particles on the filter cannot be effectively extended, resulting in excessive cleaning frequency of the filter, increased maintenance costs and labor intensity, etc.

[0007] To achieve the above-mentioned purpose, the present application provides the following technical solution: a coalbed methane particulate matter filtering device, comprising a box body, an air inlet pipe arranged at one end of the box body, an air outlet pipe arranged at the other end of the box body and connected to the air inlet pipe, and a filter screen arranged in the air inlet pipe; In order to increase the air intake of the air inlet pipe: a bent pipe connected with the air inlet pipe and the air outlet pipe is arranged on the box body; the design inspiration of the bent pipe is derived from the siphon principle. Through a specific angle and shape, it can enhance the suction force on the air inlet pipe when negative pressure is generated in the air outlet pipe, thereby increasing the air intake, accelerating the speed of coalbed methane passing through the filter, reducing the residence time of coal powder particles on the filter, and thus extending the cleaning cycle of the filter.

[0008] In order to reduce the efficiency of coal dust particles adsorbed on the filter screen: the filter screen is tilted; that is, the end of the filter screen close to the air inlet port is higher than the other end. The tilted filter screen effectively reduces the residence time and adsorption probability of coal dust particles on the filter screen, thereby extending the cleaning cycle of the filter screen and reducing maintenance costs.

[0009] In order to prolong the time that the coal dust particles inside the coal bed gas are adsorbed on the lower end of the filter screen: the box body is provided with a purge structure for purging the coal dust particles adsorbed on the lower end of the filter screen, and the purge structure includes a collecting pipe plugged into the elbow, a wind capture pipe fixedly arranged on the collecting pipe near one end of the air inlet pipe for capturing gas, a microporous aeration pipe arranged on the air inlet pipe and corresponding to the lower end of the filter screen, and a connecting pipe arranged at both ends of the collecting pipe and connected to the microporous aeration pipe; wherein, in order to increase the impact force of the gas ejected from the microporous aeration pipe: the gas outlet on the microporous aeration pipe is in the shape of a cone hole, that is, the outer port diameter is smaller than the inner port diameter. When the coal bed gas flows into the box body from the air inlet pipe, part of the gas is captured by the wind capture pipe and introduced into the collecting pipe. Under the pressure of the gas, this part of the gas enters the microporous aeration pipe through the connecting pipe. Since the outlet holes on the microporous aeration tube are conical, the gas will generate a large impact force when it is ejected, effectively sweeping the coal powder particles gathered at the bottom of the filter. This sweeping effect not only reduces the aggregation of coal powder particles, but also improves the filtration efficiency by extending the residence time of coal powder particles on the filter.

[0010] Preferably, in order to improve the capture of gas: the wind capture pipe is a tapered tube. The large end is close to the entrance of the air inlet pipe, and the small end is connected to the air collecting pipe. The tapered design is not only convenient for capturing airflow, but also can increase the flow rate of gas to the air collecting pipe through the gradually shrinking pipe diameter, improve the gas capture efficiency, and ensure the stable air supply of the purge structure.

[0011] Preferably, in order to increase the flow rate of the gas in the air collecting pipe into the microporous aeration pipe: the connecting pipe is a tapered tube. The large end is connected to the air collecting pipe, and the small end is connected to the microporous aeration pipe. The tapered design can speed up the flow rate of the gas flowing from the air collecting pipe to the microporous aeration pipe, and enhance the purging effect.

[0012] Preferably, in order to further increase the flow rate of the gas entering the microporous aeration tube from the connecting tube: a shuttle-shaped acceleration tube is fixedly connected between the connecting tube and the microporous aeration tube. The shuttle-shaped acceleration tube is shaped large in the middle and small at both ends, and is fixedly connected between the conical connecting tube and the microporous aeration tube. The shuttle-shaped design can utilize the Bernoulli principle of the fluid, that is, the pressure decreases when the flow rate increases, thereby forming a low-pressure area in the middle part of the shuttle-shaped acceleration tube, attracting the gas to accelerate through, and further increasing the flow rate of the gas entering the microporous aeration tube from the connecting tube.

[0013] Preferably, in order to prevent the coal dust particles from being adsorbed and accumulated on the filter screen during long-term use, causing clogging of the filter holes on the filter screen and affecting the passage of coalbed methane: a cleaning structure for cleaning the coal dust particles adsorbed on the lower end of the filter screen is arranged in the air inlet pipe, and the cleaning structure includes a movable seat arranged in the air inlet pipe, a cleaning brush installed on the movable seat and in conflict with the lower end of the filter screen, a guide rod slidably plugged into one end of the movable seat and fixedly connected to the air inlet pipe, a reciprocating screw rod rotatably plugged into the air inlet pipe and reciprocatingly connected to the other end of the movable seat, and a driving motor fixedly installed on the box body for driving the reciprocating screw rod to rotate, and the output end of the driving motor is fixedly connected to the end of the reciprocating screw rod. The cleaning structure can be used to clean the filter screen regularly, remove the coal dust particles adsorbed on the filter screen, prevent the filter holes from being blocked, ensure the smooth passage of coalbed methane, and improve the filtering efficiency. The cleaning structure is driven by the driving motor, which realizes automatic cleaning, reduces manual intervention, and improves work efficiency.

[0014] Preferably, in order to ensure that the cleaning brush always keeps in contact with the lower end of the filter screen: the moving seat is provided with a squeezing mechanism for squeezing the cleaning brush to move closer to the filter screen, and the squeezing mechanism includes a limiting groove provided at one end of the moving seat close to the cleaning brush, a limiting plate slidably arranged in the limiting groove and fixedly connected to the cleaning brush, a guide rod fixedly arranged at the bottom of the limiting groove, a sliding sleeve symmetrically mounted on the guide rod, a hinged plate hinged on the sliding sleeve and hinged to the limiting plate, and a fastening spring mounted between the corresponding two sliding sleeves on the guide rod. The squeezing mechanism can automatically adjust the position of the cleaning brush according to the height change of the cleaning brush, ensuring that the cleaning brush is always in close contact with the filter screen, thereby improving the cleaning effect.

[0015] Preferably, in order to ensure that the limit plate is stably placed in the limit groove: both ends of the limit plate are slidably plugged with limit rods fixedly connected to the limit groove. The design of the limit rod provides additional support and guidance for the limit plate, preventing it from deflecting or shaking during the sliding process, ensuring the stability and reliability of the cleaning brush in regulating the filter pressure.

[0016] Preferably, in order to facilitate the collection of the coal dust particles cleaned from the filter screen: a dust collecting structure for collecting the coal dust particles is provided on the box body, and the dust collecting structure includes a dust collecting chamber opened on the box body and connected to the air inlet pipe, a partition fixedly arranged in the dust collecting chamber corresponding to the lower end of the filter screen, a through conical groove opened on the partition, and a dust collecting box plugged into the box body and extending into the dust collecting chamber. The design of the dust collecting structure can realize the effective collection and treatment of the coal dust particles cleaned from the filter screen, reducing dust and environmental pollution. Through the collection and treatment of the dust collecting structure, the cleanliness of the working environment is significantly improved, which is beneficial to protecting the health and safety of the operators. The design of the dust collecting box makes the cleaning work more convenient, reduces the maintenance workload and downtime, and improves the operating efficiency of the equipment.

[0017] Preferably, in order to prevent the coal dust particles in the dust collecting chamber from entering the air inlet pipe under the influence of the airflow: a shielding mechanism is provided at the lower end of the partition, and the shielding mechanism includes a shielding plate hinged at the lower end of the partition and in conflict with the port of the conical groove, and a traction spring symmetrically fixedly arranged on the movable end of the shielding plate and fixedly connected to the lower end of the partition. The design of the shielding mechanism effectively prevents the coal dust particles in the dust collecting chamber from entering the air inlet pipe under the influence of the airflow, reduces dusting, and improves the cleanliness of the working environment.

[0018] Preferably, in order to facilitate the automatic opening of the shielding plate when cleaning the filter screen: the lower end of the movable seat is fixedly connected to a U-shaped seat, and the open end of the U-shaped seat is rotatably mounted with a roller for driving the shielding plate to open. Through the mechanical linkage design, the shielding plate is automatically opened and reset when cleaning the filter screen, reducing the use of driving parts and reducing the manufacturing cost and maintenance cost of the equipment. The automatic opening and resetting process of the shielding plate does not require manual intervention, which improves the overall efficiency and automation of the equipment.

[0019] The present application effectively reduces the aggregation degree of coal dust particles at the lower end of the filter through the design of the purge structure, thereby improving the filtering efficiency. The purge structure can purge the coal dust particles at the lower end of the filter, reduce the frequent cleaning of the filter, and extend the service life of the filter. The design of the purge structure not only realizes the purge of the filter, but also optimizes the flow path of the gas in the box, thereby improving the transmission efficiency of coalbed methane. By reducing the risk of filter blockage, the stability and reliability of the equipment are enhanced.

[0020] The present invention uses a shuttle-shaped accelerating tube that is large in the middle and small at both ends, and is fixedly connected between the conical connecting tube and the microporous aeration tube. The shuttle-shaped design can utilize the Bernoulli principle of the fluid, that is, the pressure decreases when the flow rate increases, thereby forming a low-pressure area in the middle part of the shuttle-shaped accelerating tube, attracting the gas to accelerate through, and further increasing the flow rate of the gas from the connecting tube into the microporous aeration tube.

[0021] The design inspiration of the bent pipe in this application is derived from the siphon principle. Through a specific angle and shape, it can enhance the suction force on the air inlet pipe when negative pressure is generated in the air outlet pipe, thereby increasing the air intake, accelerating the speed of coalbed methane passing through the filter, reducing the residence time of coal powder particles on the filter, and thus extending the cleaning cycle of the filter.

[0022] The inclined filter screen of the present application effectively reduces the residence time and adsorption probability of coal powder particles on the filter screen, thereby extending the cleaning cycle of the filter screen and reducing maintenance costs. The inclined filter screen design allows gas to pass through the filter screen more smoothly, reducing the problem of reduced filtration efficiency caused by particle blockage.

[0023] The present application can regularly clean the filter through the cleaning structure, remove the coal powder particles adsorbed on the filter, prevent the filter holes from being blocked, ensure the smooth passage of coalbed methane, and improve the filtering efficiency. Regular cleaning reduces the blockage of the filter, extends the service life of the filter, and reduces the replacement cost. The design of the cleaning structure avoids the frequent shutdown of the filter device for cleaning due to filter blockage, reducing energy consumption. The cleaning structure is driven by a drive motor, which realizes automatic cleaning, reduces manual intervention, and improves work efficiency.

[0024] The present application can automatically adjust the position of the cleaning brush according to the height change of the cleaning brush through the squeezing mechanism, ensuring that the cleaning brush is always in close contact with the filter screen, thereby improving the cleaning effect. Since the cleaning brush always maintains appropriate pressure, it can more effectively remove the coal powder particles adsorbed on the filter screen, thereby improving the filtering efficiency.

[0025] The present application significantly improves the cleanliness of the working environment through the collection and treatment of the dust collection structure, which is beneficial to the health and safety of the operators. The design of the dust collection box makes the cleaning work more convenient, reduces the maintenance workload and downtime, and improves the operating efficiency of the equipment.

[0026] The present application effectively prevents coal powder particles in the dust collecting chamber from entering the air inlet pipe under the influence of airflow through the design of the shielding mechanism, thereby reducing dust generation and improving the cleanliness of the working environment.

[0027] The present application realizes the automatic opening and resetting of the baffle when cleaning the filter through a mechanical linkage design, which reduces the use of drive components and reduces the manufacturing and maintenance costs of the equipment. The automatic opening and resetting process of the baffle does not require human intervention, thereby improving the overall efficiency and automation of the equipment. The contact and squeezing action of the roller bar and the baffle makes the opening of the baffle more stable and reliable, reducing the accidental opening or closing of the baffle due to airflow or accumulation of coal powder particles. The effective shielding and automatic resetting functions of the baffle reduce the escape and dusting of coal powder particles, and improve the cleanliness and safety of the working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of a coal bed gas particulate matter filtering device; Figure 2 for Figure 1 Schematic diagram of the structure inside the middle box; Figure 3 for Figure 2 A magnified view of the structure in the middle; Figure 4 It is a bottom view corresponding to the purge structure and the filter screen; Figure 5 A schematic diagram of the structure of the connection between the cleaning structure and the extrusion mechanism; Figure 6 It is a schematic diagram of the structure corresponding to the cleaning structure and the partition; Figure 7 This is a bottom view of the connection between the partition and the baffle.

[0029] In the figure: 1. Box body; 11. Air inlet pipe; 12. Air outlet pipe; 13. Bend pipe; 2. Filter; 3. Purge structure; 31. Air collecting pipe; 32. Air catching pipe; 33. Microporous aeration pipe; 34. Connecting pipe; 35. Shuttle-shaped acceleration tube; 4. Cleaning structure; 41. Moving seat; 42. Cleaning brush; 43. Guide rod; 44. Reciprocating screw rod; 45. Driving motor; 5. Extrusion mechanism; 51. Limiting groove; 52. Limiting plate; 521. Limiting rod; 53. Guide rod; 54. Sliding sleeve; 55. Hinge plate; 56. Fastening spring; 6. Dust collecting structure; 61. Dust collecting chamber; 62. Partition; 63. Conical groove; 64. Dust collecting box; 7. Shielding mechanism; 71. Shielding plate; 72. Traction spring; 8. U-shaped seat; 81. Roller rod. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0031] This embodiment provides a coal bed gas particle filtering device, such as Figure 1-7 As shown, the filtering device comprises a box body 1, an air inlet pipe 11 arranged at one end of the box body 1, an air outlet pipe 12 arranged at the other end of the box body 1 and connected to the air inlet pipe 11, and a filter screen 2 arranged in the air inlet pipe 11; In order to increase the air intake of the air inlet pipe 11: the box body 1 is provided with a bend pipe 13 connected with the air inlet pipe 11 and the air outlet pipe 12; the design inspiration of the bend pipe 13 comes from the siphon principle. Through a specific angle and shape, it can enhance the suction force on the air inlet pipe 11 when the air outlet pipe 12 generates negative pressure, thereby increasing the air intake, accelerating the speed of coal bed gas passing through the filter screen 2, reducing the residence time of coal powder particles on the filter screen 2, and thus extending the cleaning cycle of the filter screen 2. When the coal bed gas enters the box body 1 from the air inlet pipe 11, it is first filtered by the filter screen 2, and the coal powder particles are intercepted on the filter screen 2, while the clean coal bed gas continues to pass through the filter screen 2 and enter the air outlet pipe 12 through the bend pipe 13. At the same time, due to the siphon effect of the bend pipe 13, the air outlet pipe 12 can enhance the suction force on the air inlet pipe 11 when negative pressure is generated, so that more coal bed gas is sucked into the box body 1 for filtration. It not only increases the air intake, but also accelerates the speed of coalbed methane passing through the filter screen 2, effectively reducing the accumulation time of coal powder particles on the filter screen 2.

[0032] In order to reduce the efficiency of coal dust particles adsorbed on the filter 2: the filter 2 is tilted; that is, one end of the filter 2 close to the port of the air inlet pipe 11 is higher than the other end. The tilted filter 2 effectively reduces the residence time and adsorption probability of coal dust particles on the filter 2, thereby extending the cleaning cycle of the filter 2 and reducing maintenance costs. The tilted filter 2 design allows gas to pass through the filter 2 more smoothly, reducing the problem of reduced filtration efficiency caused by particle blockage. When coalbed methane enters the box 1 from the air inlet pipe 11, it first passes through the tilted filter 2. Due to the tilt angle of the filter 2, the coal dust particles that hit the filter 2 will slide down along the surface of the filter 2 under the combined effect of gravity and gas flow. This sliding action not only reduces the residence time of particles on the filter 2, but also reduces the possibility of them being adsorbed by the filter 2. At the same time, the tilted filter 2 design also helps the gas pass through the filter 2 more smoothly, improving the filtration efficiency.

[0033] In order to prolong the time that the coal dust particles inside the coal bed gas are adsorbed on the lower end of the filter 2: the box body 1 is provided with a purge structure 3 for purging the coal dust particles adsorbed on the lower end of the filter 2, the purge structure 3 includes an air collecting pipe 31 plugged into the elbow 13, a wind catching pipe 32 fixedly arranged on the air collecting pipe 31 at one end close to the air inlet pipe 11 for capturing gas, a microporous aeration pipe 33 arranged on the air inlet pipe 11 and corresponding to the lower end of the filter 2, and a connecting pipe 34 arranged at both ends of the air collecting pipe 31 and connected to the microporous aeration pipe 33; wherein, in order to increase the impact force of the gas ejected from the microporous aeration pipe 33: the air outlet on the microporous aeration pipe 33 is in the shape of a cone hole, that is, the outer port diameter is smaller than the inner port diameter. The design of the purge structure 3 effectively reduces the aggregation degree of the coal dust particles at the lower end of the filter 2, and improves the filtering efficiency. The purge structure 3 can purge the coal dust particles at the lower end of the filter screen 2, reduce the frequent cleaning of the filter screen 2, and extend the service life of the filter screen 2. The design of the purge structure 3 not only realizes the purge of the filter screen 2, but also optimizes the flow path of the gas in the box body 1, and improves the coal bed gas transmission efficiency. By reducing the risk of blockage of the filter screen 2, the stability and reliability of the equipment are enhanced. When the coal bed gas flows into the box body 1 from the air inlet pipe 11, part of the gas is captured by the wind pipe 32 and introduced into the air collecting pipe 31. Under the pressure of the gas, this part of the gas enters the microporous aeration pipe 33 through the connecting pipe 34. Since the gas outlet holes on the microporous aeration pipe 33 are conical holes, the gas will generate a large impact force when it is ejected, effectively purging the coal dust particles gathered at the lower end of the filter screen 2. This purge effect not only reduces the aggregation degree of the coal dust particles, but also improves the filtration efficiency by extending the residence time of the coal dust particles on the filter screen 2.

[0034] Specifically, in order to improve the capture of gas: the wind capture pipe 32 is a conical tube. The large end is close to the entrance of the air inlet pipe 11, and the small end is connected to the air collecting pipe 31. The conical design is not only convenient for capturing airflow, but also can increase the flow rate of gas flowing to the air collecting pipe 31 through the gradually shrinking pipe diameter, improve the gas capture efficiency, and ensure the stable gas supply of the purge structure 3. When coalbed methane flows into the box 1 from the air inlet pipe 11, the large end of the conical wind capture pipe 32 captures the airflow flowing from the air inlet pipe 11 to the air outlet pipe 12. Due to the gradually shrinking design of the conical wind capture pipe 32, the flow rate of the airflow gradually increases when passing through, which improves the gas capture efficiency. The captured gas then enters the air collecting pipe 31 through the connecting pipe 34 and is transported to the microporous aeration pipe 33 under the pressure of the gas. The microporous aeration pipe 33 sprays gas through the conical hole-shaped air outlet to purge the coal powder particles at the lower end of the filter 2, reduce the aggregation degree of the coal powder particles, and improve the filtration efficiency.

[0035] Specifically, in order to increase the flow rate of the gas in the air collecting pipe 31 flowing into the microporous aeration pipe 33: the connecting pipe 34 is a tapered tube. The large end is connected to the air collecting pipe 31, and the small end is connected to the microporous aeration pipe 33. The tapered design can speed up the gas flow rate from the air collecting pipe 31 to the microporous aeration pipe 33 and enhance the purging effect. The high-speed gas is ejected through the tapered hole-shaped air outlet of the microporous aeration pipe 33, and the coal powder particles at the lower end of the filter 2 are strongly purged, reducing the aggregation degree of the coal powder particles. When the coalbed methane flows into the box 1 from the air inlet pipe 11, the tapered air capture pipe 32 captures the airflow and introduces it into the air collecting pipe 31. Subsequently, the gas flows to the microporous aeration pipe 33 through the tapered connecting pipe 34. Due to the tapered design of the tapered connecting pipe 34, the gas flow rate gradually increases when passing through, thereby increasing the flow rate of the gas flowing into the microporous aeration pipe 33. The microporous aeration pipe 33 ejects high-speed gas through the conical air outlet to powerfully purge the coal powder particles at the lower end of the filter screen 2, thereby reducing the aggregation degree of the coal powder particles and prolonging the residence time of the coal powder particles on the filter screen 2, thereby improving the filtering efficiency.

[0036] In order to further increase the flow rate of the gas entering the microporous aeration tube 33 from the connecting tube 34: a shuttle tube 35 is fixedly connected between the connecting tube 34 and the microporous aeration tube 33. The shuttle tube 35 is in a shape of being large in the middle and small at both ends, and is fixedly connected between the conical connecting tube 34 and the microporous aeration tube 33. The shuttle design can utilize the Bernoulli principle of the fluid, that is, the pressure decreases when the flow rate increases, so as to form a low-pressure area in the middle part of the shuttle tube, attracting the gas to accelerate through, and further increase the flow rate of the gas entering the microporous aeration tube 33 from the connecting tube 34. When the coalbed methane flows into the box 1 from the air inlet pipe 11, the conical air capture pipe 32 captures the airflow and introduces it into the air collecting pipe 31. Subsequently, the gas enters the shuttle acceleration tube through the conical connecting tube 34. In the shuttle acceleration tube, due to the design of the shape of being large in the middle and small at both ends, the gas is attracted by the low-pressure area when passing through, and the flow rate gradually increases. Finally, the high-speed gas is ejected through the conical air outlet of the microporous aeration pipe 33, powerfully sweeping the coal powder particles at the lower end of the filter screen 2, reducing the aggregation degree of the coal powder particles, while extending the residence time of the coal powder particles on the filter screen 2, and improving the filtering efficiency.

[0037] In order to prevent the coal dust particles from being adsorbed and accumulated on the filter screen 2 during long-term use, causing clogging of the filter holes on the filter screen 2 and affecting the passage of coal bed gas: a cleaning structure 4 for cleaning the coal dust particles adsorbed on the lower end of the filter screen 2 is arranged in the air inlet pipe 11, and the cleaning structure 4 includes a moving seat 41 arranged in the air inlet pipe 11, a cleaning brush 42 installed on the moving seat 41 and in conflict with the lower end of the filter screen 2, a guide rod 43 slidably plugged into one end of the moving seat 41 and fixedly connected to the air inlet pipe 11, a reciprocating screw rod 44 rotatably plugged into the air inlet pipe 11 and reciprocatingly connected to the other end of the moving seat 41, and a driving motor 45 fixedly installed on the housing 1 for driving the reciprocating screw rod 44 to rotate, and the output end of the driving motor 45 is fixedly connected to the end of the reciprocating screw rod 44. The cleaning structure 4 can regularly clean the filter screen 2, remove the coal dust particles adsorbed on the filter screen 2, prevent the filter holes from being blocked, ensure the smooth passage of coal bed gas, and improve the filtering efficiency. Regular cleaning reduces the blockage of the filter 2, extends the service life of the filter 2, and reduces the replacement cost. The design of the cleaning structure 4 avoids the frequent shutdown and cleaning of the filter device due to the blockage of the filter 2, and reduces energy consumption. The cleaning structure 4 is driven by the drive motor 45, which realizes automatic cleaning, reduces manual intervention, and improves work efficiency. During the coalbed methane filtration process, the purge structure 3 is started regularly, and the airflow is captured by the conical wind capture tube 32. After being accelerated by the conical connecting tube 34 and the shuttle accelerator tube 35, the high-speed gas is ejected from the microporous aeration tube 33 to purge the coal powder particles at the lower end of the filter 2. However, after long-term use, some coal powder particles may still be adsorbed and accumulated on the filter 2, causing the filter holes to be blocked. At this time, the cleaning structure 4 is started, and the drive motor 45 drives the reciprocating screw 44 to rotate. Under the reciprocating cooperation between the reciprocating screw 44 and the movable seat 41, and under the guiding action of the guide rod 43, the movable seat 41 drives the cleaning brush 42 to reciprocate along the lower end of the filter screen 2 to clean the filter screen 2, thereby removing the coal powder particles adsorbed on the filter screen 2 and restoring the filtering efficiency of the filter screen 2.

[0038] In order to ensure that the cleaning brush 42 always keeps in contact with the lower end of the filter screen 2: the moving seat 41 is provided with a squeezing mechanism 5 for squeezing the cleaning brush 42 to move close to the filter screen 2, and the squeezing mechanism 5 includes a limiting groove 51 opened at one end of the moving seat 41 close to the cleaning brush 42, a limiting plate 52 slidably arranged in the limiting groove 51 and fixedly connected to the cleaning brush 42, a guide rod 53 fixedly arranged at the bottom of the limiting groove 51, a sliding sleeve 54 symmetrically sleeved on the guide rod 53, a hinged plate 55 hinged on the sliding sleeve 54 and hinged to the limiting plate 52, and a fastening spring 56 sleeved between the corresponding two sliding sleeves 54 on the guide rod 53. The squeezing mechanism 5 can automatically adjust the position of the cleaning brush 42 according to the height change of the cleaning brush 42, ensure that the cleaning brush 42 is always in close contact with the filter screen 2, and improve the cleaning effect. Since the cleaning brush 42 always maintains appropriate pressure, it can more effectively remove the coal powder particles adsorbed on the filter screen 2 and improve the filtering efficiency. When the device is running, the cleaning brush 42 reciprocates along the lower end of the filter screen 2 under the drive of the driving motor 45. Due to the wear of the cleaning brush 42 caused by long-term use, the height of the cleaning brush 42 may change. At this time, the squeezing mechanism 5 automatically adjusts the pressure of the cleaning brush 42. The elastic force of the fastening spring 56 causes the two sliding sleeves 54 to move toward the opposite end thereof, and through the action of the hinge plate 55, the limit plate 52 and the cleaning brush 42 are pushed to move toward the direction close to the filter screen 2, ensuring that the cleaning brush 42 is always in close contact with the lower end of the filter screen 2. When the height of the cleaning brush 42 is reduced, the pressure on the cleaning brush 42 increases, and the sliding sleeve 54 moves inward under the action of the spring, and the vertical displacement of the limit plate 52 and the cleaning brush 42 is reduced through the hinge plate 55, thereby maintaining appropriate pressure; conversely, when the height of the cleaning brush 42 increases, the pressure on the cleaning brush 42 decreases, and the sliding sleeve 54 moves outward under the action of the spring, and the vertical displacement of the limit plate 52 and the cleaning brush 42 is increased through the hinge plate 55, thereby increasing the pressure. This adaptive adjustment mechanism ensures that the cleaning brush 42 can maintain close contact with the filter screen 2 under different conditions, thereby improving the cleaning effect.

[0039] Specifically, in order to ensure that the limiting plate 52 is stably placed in the limiting groove 51: both ends of the limiting plate 52 are slidably inserted with limiting rods 521 fixedly connected to the limiting groove 51. The design of the limiting rod 521 provides additional support and guidance for the limiting plate 52, preventing it from deflecting or shaking during the sliding process, and ensuring the stability and reliability of the cleaning brush 42 in regulating the pressure of the filter screen 2.

[0040] In order to facilitate the collection of the coal dust particles cleaned from the filter 2: the box body 1 is provided with a dust collecting structure 6 for collecting the coal dust particles, and the dust collecting structure 6 includes a dust collecting chamber 61 opened on the box body 1 and connected to the air inlet pipe 11, a partition 62 fixedly arranged in the dust collecting chamber 61 corresponding to the lower end of the filter 2, a through conical groove 63 opened on the partition 62, and a dust collecting box 64 plugged into the box body 1 and extending into the dust collecting chamber 61. The design of the dust collecting structure 6 can realize the effective collection and treatment of the coal dust particles cleaned from the filter 2, reducing dust and environmental pollution. Through the collection and treatment of the dust collecting structure 6, the cleanliness of the working environment is significantly improved, which is conducive to protecting the health and safety of the operators. The design of the dust collecting box 64 makes the cleaning work more convenient, reduces the maintenance workload and downtime, and improves the operating efficiency of the equipment. When the device is running, the cleaning structure 4 cleans the coal dust particles adsorbed on the lower end of the filter 2. The cleaned coal dust particles first fall into the conical groove 63 above the partition 62. Due to the guiding effect of the conical groove 63, the coal dust particles smoothly enter the collection area of ​​the dust collecting chamber 61. As the coal dust particles continue to accumulate, they eventually fall into the dust collecting box 64 for centralized collection and treatment. The design of the dust collecting box 64 makes the collection of coal dust particles more efficient and convenient, while reducing dust and improving the cleanliness and safety of the working environment.

[0041] In order to prevent the coal dust particles in the dust collecting chamber 61 from entering the air inlet pipe 11 under the influence of the airflow: a shielding mechanism 7 is provided at the lower end of the partition 62, and the shielding mechanism 7 includes a shielding plate 71 hinged at the lower end of the partition 62 and in conflict with the port of the conical groove 63, and a traction spring 72 symmetrically fixed on the movable end of the shielding plate 71 and fixedly connected to the lower end of the partition 62. The design of the shielding mechanism 7 effectively prevents the coal dust particles in the dust collecting chamber 61 from entering the air inlet pipe 11 under the influence of the airflow, reduces the dust phenomenon, and improves the cleanliness of the working environment. The traction spring 72 provides elastic force for the shielding plate 71, so that it can automatically reset under the action of external force, ensuring the stability and reliability of the shielding mechanism 7. The bumping force generated by the elastic force of the traction spring 72 helps to make the dust attached to the shielding plate 71 slide off, realizes the automatic cleaning of the shielding plate 71, and reduces the maintenance workload and downtime. When the device is running, the cleaning structure 4 cleans the coal dust particles adsorbed on the lower end of the filter screen 2. The cleaned coal powder particles fall into the conical groove 63. When the shielding plate 71 is subjected to external force (such as air flow impact or accumulation of coal powder particles), the traction spring 72 undergoes elastic deformation, allowing the shielding plate 71 to move within a certain range. When the external force disappears, the traction spring 72 automatically resets, driving the shielding plate 71 back to the initial position, and continues to block the escape of coal powder particles. In addition, the elastic force of the traction spring 72 can also generate an elastic bumping force between the movable end of the shielding plate 71 and the partition 62. This bumping force helps the dust attached to the shielding plate 71 to slide down under the action of vibration, thereby realizing automatic cleaning of the shielding plate 71 and reducing dust accumulation.

[0042] In order to facilitate the automatic opening of the baffle 71 when cleaning the filter 2: the lower end of the movable seat 41 is fixedly connected to the U-shaped seat 8, and the open end of the U-shaped seat 8 is rotatably installed with a roller 81 for driving the baffle 71 to open. Through the mechanical linkage design, the automatic opening and resetting of the baffle 71 when cleaning the filter 2 is realized, which reduces the use of driving parts and reduces the manufacturing cost and maintenance cost of the equipment. The automatic opening and resetting process of the baffle 71 does not require manual intervention, which improves the overall efficiency and automation of the equipment. The contact and squeezing effect of the roller 81 and the baffle 71 makes the opening of the baffle 71 more stable and reliable, and reduces the accidental opening or closing of the baffle 71 due to airflow or accumulation of coal powder particles. The effective shielding and automatic resetting function of the baffle 71 reduces the escape and dust of coal powder particles, and improves the cleanliness and safety of the working environment. When the device is running, when it is necessary to clean the coal powder particles adsorbed on the lower end of the filter screen 2, the cleaning brush 42 of the cleaning structure 4 moves back and forth along the lower end of the filter screen 2 under the drive of the drive motor 45. At this time, the movable seat 41 drives the U-shaped seat 8 and the roller 81 to move synchronously. When the roller 81 moves to contact the upper end of the baffle plate 71, with the cooperation of the movable seat 41, the U-shaped seat 8 and the roller 81, the roller 81 squeezes the movable end of the baffle plate 71 to hinge and move downward. In this process, the traction spring 72 is stretched and stored, and at the same time, the upper end of the baffle plate 71 is separated from the end of the conical groove 63, and the conical groove 63 is opened, so that the cleaned coal powder particles can fall into the dust collecting chamber 61. As the movable seat 41 moves upward, the roller 81 gradually disengages from the baffle plate 71. At this time, under the elastic force of the traction spring 72, the movable end of the shielding plate 71 automatically resets, and the upper end of the shielding plate 71 is tightly in contact with the end of the tapered groove 63 again, thereby shielding the tapered groove 63. Through this linkage design, the opening and resetting process of the shielding plate 71 is automated without the need for additional drive components. At the same time, the contact and squeezing effect of the roller 81 and the shielding plate 71 makes the opening of the shielding plate 71 more stable and reliable, reducing the accidental opening or closing of the shielding plate 71 due to airflow or accumulation of coal powder particles.

[0043] The above is only a preferred specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes according to the technical solution and concept of the present application within the technical scope disclosed in the present application, which should be covered by the protection scope of the present application.

Claims

1. A coal bed gas particulate filtering device, comprising a housing (1), an air inlet pipe (11) arranged at one end of the housing (1), an air outlet pipe (12) arranged at the other end of the housing (1) and connected to the air inlet pipe (11), and a filter (2) arranged in the air inlet pipe (11); Features: The box body (1) is provided with a bent pipe (13) connected to the air inlet pipe (11) and the air outlet pipe (12); The filter screen (2) is arranged at an angle; The box body (1) is provided with a purge structure (3) for purging coal powder particles adsorbed on the lower end of the filter screen (2), the purge structure (3) comprising an air collecting pipe (31) plugged into the bent pipe (13), an air catching pipe (32) fixedly arranged on one end of the air collecting pipe (31) close to the air inlet pipe (11) for capturing gas, a microporous aeration pipe (33) arranged on the air inlet pipe (11) and corresponding to the lower end of the filter screen (2), and connecting pipes (34) arranged at both ends of the air collecting pipe (31) and connected to the microporous aeration pipe (33); The air outlet holes on the microporous aeration tube (33) are in the shape of a cone, that is, the diameter of the outer port is smaller than the diameter of the inner port.

2. The coal bed gas particulate matter filtering device according to claim 1, characterized in that: The wind catching tube (32) is in the shape of a tapered tube.

3. The coal bed gas particulate matter filtering device according to claim 1, characterized in that: The connecting pipe (34) is in the shape of a tapered tube.

4. The coal bed gas particulate matter filtering device according to claim 1, characterized in that: A shuttle-shaped accelerating tube (35) is fixedly connected between the connecting tube (34) and the microporous aeration tube (33).

5. The coal bed gas particulate matter filtering device according to claim 1, characterized in that: A cleaning structure (4) for cleaning coal powder particles adsorbed on the lower end of the filter (2) is arranged in the air inlet pipe (11), and the cleaning structure (4) comprises a movable seat (41) arranged in the air inlet pipe (11), a cleaning brush (42) mounted on the movable seat (41) and in contact with the lower end of the filter (2), a guide rod (43) slidably plugged into one end of the movable seat (41) and fixedly connected to the air inlet pipe (11), a reciprocating screw (44) rotatably plugged into the air inlet pipe (11) and reciprocatingly connected to the other end of the movable seat (41), and a driving motor (45) fixedly mounted on the housing (1) and used for driving the reciprocating screw (44) to rotate, wherein the output end of the driving motor (45) is fixedly connected to the end of the reciprocating screw (44).

6. The coal bed gas particulate matter filtering device according to claim 5, characterized in that: The movable seat (41) is provided with a squeezing mechanism (5) for squeezing the cleaning brush (42) to move closer to the filter screen (2), the squeezing mechanism (5) comprising a limiting groove (51) provided at one end of the movable seat (41) close to the cleaning brush (42), a limiting plate (52) slidably arranged in the limiting groove (51) and fixedly connected to the cleaning brush (42), a guide rod (53) fixedly arranged at the bottom of the limiting groove (51), a sliding sleeve (54) symmetrically mounted on the guide rod (53), a hinged plate (55) hinged on the sliding sleeve (54) and hinged to the limiting plate (52), and a fastening spring (56) mounted between two corresponding sliding sleeves (54) on the guide rod (53).

7. The coal bed gas particulate matter filtering device according to claim 6, characterized in that: Both ends of the limiting plate (52) are slidably plugged with limiting rods (521) fixedly connected to the limiting groove (51).

8. The coal bed gas particulate matter filtering device according to claim 1, characterized in that: The housing (1) is provided with a dust collecting structure (6) for collecting coal powder particles, the dust collecting structure (6) comprising a dust collecting chamber (61) provided on the housing (1) and connected to the air inlet pipe (11), a partition (62) fixedly provided in the dust collecting chamber (61) corresponding to the lower end of the filter screen (2), a through conical groove (63) provided on the partition (62), and a dust collecting box (64) plugged into the housing (1) and extending into the dust collecting chamber (61).

9. The coal bed gas particulate matter filtering device according to claim 8, characterized in that: A shielding mechanism (7) is provided at the lower end of the partition (62), the shielding mechanism (7) comprising a shielding plate (71) hinged to the lower end of the partition (62) and in contact with the end of the conical groove (63), and a traction spring (72) symmetrically fixedly arranged on the movable end of the shielding plate (71) and fixedly connected to the lower end of the partition (62).

10. The coal bed gas particulate matter filtering device according to claim 5, characterized in that: The lower end of the movable seat (41) is fixedly connected to a U-shaped seat (8), and the opening end of the U-shaped seat (8) is rotatably mounted with a roller (81) for driving the shielding plate (71) to open.

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