Coal bed gas gathering and transportation coal ash filtering and collecting device

Abstract

The application discloses a coalbed gas gathering and filtering coal ash collecting device and relates to the technical field of coalbed gas filtering. The device comprises a cylindrical shell and a coal ash collecting box. The two ends of the shell are closed, an arc-shaped ash discharging port is arranged at the bottom of the shell, an air inlet and an air outlet are arranged on the closed structure of the two ends of the shell, a rotating filter frame is arranged in the inner cavity of the shell, a plurality of filter materials for filtering coal ash in the coalbed gas flowing through the inner cavity of the shell are arranged on the rotating filter frame, the rotating filter frame is driven by a motor arranged outside the shell, and the coal ash between the filter materials and the air inlet can be transported to the ash discharging port at the bottom of the shell under the rotation of the rotating filter frame. The coal ash collecting box is arranged below the ash discharging port and movably arranged on the outer ring sidewall of the shell. The rotating filter frame is used for switching the filter screen, and the functions of cleaning, disassembling, replacing, drying and collecting the filter screen are realized in the process of filtering the coalbed gas, so that the problem that the production needs to be stopped when the filter material is replaced in the prior art is solved.

Description

Technical Field

[0001] This invention belongs to the field of coalbed methane filtration technology, specifically relating to a coalbed methane gathering and conveying coal ash filtration and collection device. Background Technology

[0002] my country is a major coal producer with abundant coal reserves. With coal mining, the byproduct coalbed methane, commonly known as "gas," is also produced in enormous quantities. The main component of coalbed methane is methane. It is an unconventional natural gas that is associated with coal and stored in an adsorbed state within coal seams. Its calorific value is 2-5 times that of conventional coal. The calorific value of 1 cubic meter of pure coalbed methane is equivalent to 1.13 kg of gasoline or 1.21 kg of standard coal, comparable to that of natural gas. It can be mixed and used with natural gas, and its combustion is very clean, producing almost no waste gas. It is an excellent fuel for industry, chemical industry, power generation, and residential use. Therefore, the development and utilization of coalbed methane has multiple benefits; as a highly efficient and clean energy source, its commercialization can generate huge economic benefits.

[0003] Currently, a large portion of coalbed methane utilization is for combustion power generation. As a transportation device in this system, the coalbed methane screw compressor plays a crucial role, compressing the coalbed methane from the mine and transporting it through pipelines to designated locations. However, coalbed methane contains a large amount of solid particles (coal ash) and liquid droplets of water vapor. During coalbed methane transportation, these particles can severely damage the compressor cylinders and sealing elements, and clog fine filter elements. Therefore, frequent replacement of compressor cylinders and sealing elements, as well as frequent cleaning or replacement of fine filter elements, are necessary. Replacing these elements requires shutdown, disrupting normal production, increasing worker workload, and raising production costs. Although various forms of coalbed methane filtration devices exist in current technology, many existing devices, as mentioned above, require production shutdowns when replacing filter media. Furthermore, existing equipment is bulky, heavy, and costly to manufacture, making it inflexible for use in coalbed methane transportation pipelines. Summary of the Invention

[0004] The purpose of this invention is to provide a coalbed methane gathering and transportation coal ash filtration and collection device. The device is characterized by: using a rotating filter frame to switch filter screens, and simultaneously realizing the functions of cleaning, disassembling and replacing, drying and collecting coal ash during the coalbed methane filtration process, thus solving the problem of production stoppage required when replacing filter media in the prior art.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows:

[0006] A coalbed methane gathering and conveying coal ash filtration and collection device includes: a cylindrical shell, which is vertically arranged, with closed structures at both ends. An arc-shaped ash discharge port is provided at the bottom of the shell, and an air inlet and an air outlet are respectively provided on the closed structures at both ends of the shell. A rotating filter frame is provided in the inner cavity of the shell, and the rotating filter frame is provided with multiple filter media for filtering out coalbed methane ash flowing through the inner cavity of the shell. The rotating filter frame is driven by a motor provided outside the shell. Under the rotation of the rotating filter frame, the coal ash between the filter media and the air inlet can be transported to the ash discharge port at the bottom of the shell.

[0007] A coal ash collection box is located below the ash discharge port and is used to close the ash discharge port and collect coal ash. The coal ash collection box is movably mounted on the outer ring side wall of the shell and is used to open the ash discharge port and automatically pour out the coal ash in the coal ash collection box by gravity.

[0008] Furthermore, the coal ash collection box is an arc-shaped box attached to the outer ring side wall of the shell. The coal ash collection box has an opening on the side facing the shell, which is used for coal ash to fall into the box cavity. An arc-shaped slide rail is respectively fitted around both ends of the outer ring side wall of the shell. The arc-shaped slide rail has an arc-shaped groove. The coal ash collection box is sandwiched between the two arc-shaped slide rails. Multiple arc-shaped sliders are provided on both sides of the coal ash collection box. The arc-shaped sliders are inserted into the arc-shaped grooves on the corresponding sides. Pushing the coal ash collection box in the circumferential direction can make it slide along the outer ring side wall of the shell.

[0009] Furthermore, a row of ash pipes is connected to the lower end of the coal ash collection box. One end of the ash pipes is connected to the cavity of the coal ash collection box, and the other end of the ash pipes is provided with a screw cap.

[0010] Furthermore, the device of the present invention also includes a positioning mechanism for fixing the coal ash collection box, the positioning mechanism comprising:

[0011] A hinge base, the bottom of which is fixedly connected to the top of the housing;

[0012] An active claw, one end of which is fixed to the upper end of the coal ash collection box, the back of which abuts against the outer ring side wall of the shell, and the other end of which is provided with a wedge-shaped lower claw.

[0013] The driven pawl has one end hinged to the upper part of the hinge seat via a hinge shaft, with its back facing upwards. The other end of the driven pawl is provided with a wedge-shaped upper pawl that engages with the upper pawl.

[0014] A torsion spring, one end of which is connected to the inner side of the hinge seat, and the other end of which is connected to the hinge shaft. The torsion spring is used for the hinge shaft to rotate and reset.

[0015] When the upper and lower jaws engage with each other, there is a gap between the lower jaw and the hinge seat, which is used for the movement of the active jaw.

[0016] Furthermore, the sealing structures at both ends of the housing are respectively set with a left sealing plate and a right sealing plate. The air inlet is opened at an eccentric position on the upper part of the left sealing plate and is connected to an air inlet pipe. The air outlet is opened at an eccentric position on the upper part of the right sealing plate and is connected to an air outlet pipe. The air inlet pipe and the air outlet pipe correspond to each other.

[0017] The rotating filter frame includes a central rotating shaft and four partitions arranged vertically along the length of the rotating shaft. The four partitions are arranged in a ring array radially along the rotating shaft. The two sides of the partitions are in contact with the inner sides of the closed structures at both ends of the housing, and the outer sides of the partitions are in contact with the inner wall of the housing. Two adjacent partitions, together with the closed structures at the ends of the housing and the inner wall of the housing, form a sealed chamber. The chamber includes a filtration chamber and a reverse-jet blowing chamber on the upper two sides, and a drying chamber and a disassembly chamber on the lower two sides. The ash discharge port is connected to the disassembly chambers on both sides of the filter material, and the ash discharge port is only connected to the drying chamber on the air inlet side of the filter material. The two ends of the rotating shaft are rotatably connected to the center of the left and right sealing plates, respectively. The motor is fixedly installed on the outer side of the right sealing plate. A right bearing is provided at the center of the right sealing plate, and a left bearing is provided at the center of the left sealing plate. One end of the rotating shaft passes through the right bearing and extends to the outer side of the right sealing plate. Its outer end is connected to the power output shaft of the motor, and the other end of the rotating shaft is connected to the rotation center of the left bearing.

[0018] The filter media consists of four quarter-circles, which are respectively clamped between two adjacent partitions. The two sides of the filter media are in close contact with the corresponding partitions. The outer arc-shaped side of the filter media is in contact with the inner wall of the shell. The inner end of the filter media is connected to the rotating shaft. The filter media includes a filter screen at its center for filtering out coal ash. The filter media is located at the middle side of the rotating shaft axis.

[0019] Preferably, the opening arc of the ash discharge port is between 135° and 180°.

[0020] Furthermore, the filter material includes an outer frame located at the outer edge of the filter screen and an arc-shaped plate located on one side of the inner end of the filter material. The arc-shaped plate is vertically fixed to the outer frame and is located on the side of the air outlet. A slot is provided on both sides of the partition plate, and a cavity is provided on the side of the rotating shaft between two adjacent partition plates. One end of the slot extends to the outer edge of the partition plate, and the other end of the slot extends to connect with the cavity. The two sides of the outer frame are respectively engaged in the slots on the corresponding sides. The arc-shaped plate is fitted into the cavity, and two screw holes are provided radially along the rotating shaft in the cavity. Two through holes corresponding to the screw holes are provided on the arc-shaped plate, and a bolt is provided in each through hole. One end of the bolt is threaded into the screw hole.

[0021] Furthermore, a reverse jetting mechanism is provided on the right sealing plate. The reverse jetting mechanism is used to reverse jettison the filter screen in the reverse jetting chamber. The reverse jetting mechanism includes a jetting pipe, an electromagnetic pulse valve, and an air storage tank fixedly installed on the outer side of the right sealing plate. One end of the jetting pipe is connected to the air storage tank, and the other end of the jetting pipe is inserted into the right sealing plate and communicates with the reverse jetting chamber. The jetting end of the jetting pipe points towards the filter screen. The electromagnetic pulse valve is located on the jetting pipe. The jetting pipe is located diagonally above the motor and is opposite to the air outlet.

[0022] Furthermore, a dryer is provided on the right sealing plate, located below the air outlet pipe. The dryer is used to dry the filter screen in the drying chamber. A strip-shaped mounting hole is opened on the right sealing plate, which connects to the drying chamber. The dryer is embedded in the mounting hole. The dryer includes an outer cover exposed on the outer side of the right sealing plate and a heating tube built into the inner side of the right sealing plate. The heating tube is used to dry the drying chamber and the space connected to it. A mesh hole is provided on the right sealing plate to discharge moisture from the drying chamber.

[0023] Furthermore, the device of the present invention also includes a controller and a differential pressure sensor. The controller is electrically connected to the differential pressure sensor, the motor, the dryer, and the electromagnetic pulse valve. The differential pressure sensor is used to measure the pressure difference between the air inlet pipe and the air outlet pipe at the left and right ends of the device.

[0024] The present invention has at least the following beneficial effects:

[0025] (1) The device of the present invention has a compact and ingenious structure, small size, can be installed on coalbed methane transmission pipeline, is easy to disassemble and install, and is easy to implement. Compared with existing filtration equipment, it has its unique advantages.

[0026] (2) The device of the present invention can simultaneously achieve the following multiple functions by setting up a filter chamber, a reverse jet cleaning chamber, a drying chamber, a disassembly and assembly chamber, an ash discharge port and a coal ash collection box: first, filtering coal ash in coalbed methane; second, jet cleaning of filter media; third, disassembly, replacement and maintenance of filter media; fourth, drying of the rotating filter frame, filter media and the inner cavity of the coal ash collection box; and fifth, automatic discharge and collection of coal ash. Moreover, the above multiple functions do not interfere with each other during the implementation process.

[0027] (3) By setting up a differential pressure sensor and controller, the present invention can intelligently and automatically realize the above functions without human intervention. It has the advantages of no shutdown, fast switching, high efficiency, and saving time and effort.

[0028] (4) The device of the present invention can effectively connect and cycle the above functions by setting a rotating filter frame and setting the filter chamber, reverse jet chamber, disassembly chamber and drying chamber in a clockwise direction;

[0029] (5) The arc-shaped coal ash collection box provided in this invention has the advantages of novel structure, small size, not taking up too much space, and large storage capacity because it is circumferentially fitted on the outer side wall of the shell. In addition, by sliding the coal ash collection box on the shell, it can automatically discharge coal ash by gravity. In this embodiment, the positioning mechanism can fix the coal ash collection box on the side of the shell, which is convenient for operators to collect and remove coal ash and replace and maintain the filter material. Attached Figure Description

[0030] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0031] Figure 1 This is a simplified three-dimensional structural diagram of the device in the left-view state of Embodiment 1;

[0032] Figure 2 This is a simplified three-dimensional structural diagram of the device in the right-side view of Embodiment 1;

[0033] Figure 3 yes Figure 2 Exploded view of the device;

[0034] Figure 4 yes Figure 1 Exploded view of the device;

[0035] Figure 5 yes Figure 4 Layout diagram of the middle shell, rotating filter frame and coal ash collection box (left view);

[0036] Figure 6 yes Figure 4 Layout view of the middle shell, rotating filter frame and coal ash collection box (right view);

[0037] Figure 7 This is a schematic diagram of the shell structure from the left view.

[0038] Figure 8 This is a structural schematic diagram of the shell in its left-hand view (the coal ash collection box slides to the side of the shell).

[0039] Figure 9 This is a schematic diagram of the device from Example 1 applied to a coalbed methane transmission pipeline;

[0040] Figure 10 yes Figure 6 A breakdown diagram of the rotating filter frame and filter media;

[0041] Figure 11 yes Figure 8 A magnified view of a section at point B in the middle;

[0042] Figure 12 yes Figure 11 Diagram showing the connection between the lower and upper jaws;

[0043] The markings in the diagram are as follows: 1. Shell; 101. Ash discharge port; 102. Air inlet; 103. Air outlet; 104. Arc-shaped slide rail; 105. Arc-shaped slide groove; 106. Left sealing plate; 107. Right sealing plate; 108. Air inlet pipe; 109. Air outlet pipe; 110. Filter chamber; 111. Reverse jet cleaning chamber; 112. Disassembly and assembly chamber; 113. Drying chamber; 114. Right bearing; 115. Left bearing;

[0044] 2. Coal ash collection box; 201. Open opening; 202. Arc-shaped slider; 203. Screw cap;

[0045] 3. Rotating filter frame; 301. Rotating shaft; 302. Partition plate; 303. Strip groove; 304. Cavity; 305. Screw hole;

[0046] 4. Filter media; 401. Filter screen; 402. Outer frame; 403. Arc plate; 404. Perforation;

[0047] 5. Electric motor;

[0048] 6. Purge pipe; 7. Electromagnetic pulse valve; 8. Air reservoir; 9. Outer cover; 10. Heating tube; 11. Hinge seat; 12. Active chuck; 13. Driven chuck; 14. Lower chuck; 15. Upper chuck; 16. Torsion spring; 17. Hinge shaft; 18. Bracket; 19. Conveying pipe. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0050] Example 1

[0051] This embodiment proposes a coalbed methane gathering and conveying coal ash filtration and collection device, combined with... Figures 1-6 As shown, it includes: a vertically arranged cylindrical shell 1 and a coal ash collection box 2 movably arranged on the outer side wall of the shell 1. The shell 1 has closed ends and an arc-shaped ash discharge port 101 at the bottom of the shell 1. An air inlet 102 and an air outlet 103 are respectively provided on the closed ends of the shell 1. A rotating filter frame 3 is provided in the inner cavity of the shell 1. The rotating filter frame 3 is provided with multiple filter media 4 for filtering out coal ash from coalbed methane flowing through the inner cavity of the shell 1. The rotating filter frame 3 is driven by a motor 5 provided outside the shell 1. The rotation of the rotating filter frame 3 can transport the coal ash between the filter media 4 and the air inlet 102 to the ash discharge port 101 at the bottom of the shell 1. In addition, brackets 18 are provided on both sides of the bottom of the shell 1 for supporting the device.

[0052] The coal ash collection box 2 is located below the ash discharge port 101 and is used to close the ash discharge port 101 and collect coal ash. The coal ash collection box 2 is movably installed on the outer ring side wall of the shell 1 and is used to open the ash discharge port 101 and automatically pour out the coal ash in the coal ash collection box 2 by gravity. Furthermore, the coal ash collection box 2 is an arc-shaped box attached to the outer side wall of the shell 1. The coal ash collection box 2 has an opening 201 on one side facing the shell 1, allowing coal ash to fall into its cavity. An arc-shaped slide rail 104 is fitted around both ends of the outer side wall of the shell 1, with an arc-shaped groove 105 within each rail. The coal ash collection box 2 is sandwiched between the two arc-shaped slide rails 104. Multiple arc-shaped sliders 202 are provided on both sides of the coal ash collection box 2, inserted into the corresponding arc-shaped grooves 105. Circumferentially pushing the coal ash collection box 2 allows it to slide along the outer side wall of the shell 1. A row of ash pipes is connected to the lower end of the coal ash collection box 2. One end of the ash pipe connects to the cavity of the coal ash collection box 2, and the other end has a cap 203. Opening the cap 203 allows the collected coal ash to be discharged.

[0053] Specifically, the sealing structures at both ends of the aforementioned shell 1 are respectively set with a left sealing plate 106 and a right sealing plate 107. The air inlet 102 is opened at an eccentric position on the upper part of the left sealing plate 106, and the air inlet 102 is connected to an air inlet pipe 108. The air outlet 103 is opened at an eccentric position on the upper part of the right sealing plate 107, and the air outlet 103 is connected to an air outlet pipe 109. The air inlet pipe 108 and the air outlet pipe 109 correspond to each other, and the outer ends of the air inlet pipe 108 and the air outlet pipe 109 are both connected to the coalbed methane transmission pipeline 19.

[0054] In this embodiment, the rotating filter frame 3 includes a central rotating shaft 301 and four partitions 302 arranged perpendicularly along the length of the rotating shaft 301. The four partitions 302 are arranged in a ring array in the radial direction of the rotating shaft 301. The two sides of the partitions 302 are respectively in contact with the inner sides of the closed structures at both ends of the housing 1, and the outer sides of the partitions 302 are in contact with the inner wall of the housing 1. Two adjacent partitions 302, together with the closed structures at the ends of the housing 1 and the inner wall of the housing 1, form a sealed chamber. See again. Figures 7-8As shown, the chamber includes a filter chamber 110 and a reverse jet cleaning chamber 111 on the upper two sides, and a drying chamber 113 and a disassembly chamber 112 on the lower two sides. The ash discharge port 101 is connected to the disassembly chamber 112 on both sides of the filter material 4, and the ash discharge port 101 is only connected to the drying chamber 113 on the air inlet side of the filter material 4. The two ends of the rotating shaft 301 are rotatably connected to the center of the left sealing plate 106 and the right sealing plate 107, respectively. The motor 5 is fixedly installed on the outer side of the right sealing plate 107. A right bearing 114 is provided at the center of the right sealing plate 107, and a left bearing 115 is provided at the center of the left sealing plate 106. One end of the rotating shaft 301 passes through the right bearing 114 and extends to the outer side of the right sealing plate 107. Its outer end is connected to the power output shaft of the motor 5. The other end of the rotating shaft 301 is connected to the rotation center of the left bearing 115.

[0055] In this embodiment, there are four filter media 4, each being a quarter circle. The four filter media 4 are respectively clamped between two adjacent partitions 302. The two side edges of the filter media 4 are respectively in close contact with the corresponding side partitions 302. The outer arc-shaped side edge of the filter media 4 is in contact with the inner wall of the housing 1. The inner end of the filter media 4 is connected to the rotating shaft 301. The filter media 4 includes a filter screen 401 at its center for filtering out coal ash. The filter media 4 is located at the middle side position in the axial direction of the rotating shaft 301.

[0056] Based on the above, this embodiment adds a reverse jetting mechanism to the right sealing plate 107. The reverse jetting mechanism is used to reverse jettison the filter material 4 in the reverse jetting chamber 111 to clean the coal ash accumulated on the front of the filter material 4. Specifically, the jetting mechanism includes an L-shaped jetting pipe 6, an electromagnetic pulse valve 7 electrically connected to the controller, and an air storage tank 8 fixedly installed on the outer side of the right sealing plate 107. One end (air inlet) of the jetting pipe 6 is connected to the air storage tank 8, which supplies air. The other end (jet outlet) of the jetting pipe 6 is inserted into the right sealing plate 107. In plate 107, it is connected to the back-jet chamber 111 and faces the opposite side of the filter screen 401. The end of the jet pipe 6 is embedded in the right sealing plate 107, so as not to interfere with or obstruct the rotating filter frame 3 and not to affect the operation of the rotating filter frame 3. The electromagnetic pulse valve 7 is installed on the jet pipe 6 and is electrically connected to the controller. The jet pipe 6 is located obliquely above the motor 5 and is opposite to the eccentric outlet hole. A vent valve (not shown) is also installed on the right sealing plate 107 on the side of the jet pipe 6 to reduce the air pressure in the back-jet chamber 111 and prevent explosion. In this embodiment, the electromagnetic pulse valve 7 is opened at regular intervals, and the compressed air in the air storage tank 8 enters the inner cavity of the housing 1 through the blow pipe 6 and sprays it to impact the back of the filter screen 401, thereby achieving the purpose of back-blowing to remove coal ash from the filter material 4. By adopting the above-mentioned blow mechanism and scheme, the filter material 4 in the back-blowing chamber 111 can be cleaned by blow during the coalbed methane filtration process. Moreover, the blow operation does not affect the disassembly and replacement of the filter material 4 in the disassembly chamber 112 or the filtration of the coalbed methane flowing through the filtration chamber 110, which greatly improves the efficiency and functionality of the device.

[0057] A dryer is provided on the right sealing plate 107, located below the air outlet pipe 109. The dryer is used to dry the filter screen 401 in the drying chamber 113. A strip-shaped mounting hole is opened on the right sealing plate 107, which leads to the drying chamber 113. The dryer is embedded in the mounting hole. Specifically, the dryer includes an outer cover 9 exposed on the outer side of the right sealing plate 107 and a heating pipe 10 set on the inner side of the right sealing plate 107. The heating pipe 10 is embedded in the right sealing plate 107 and does not interfere with or obstruct the rotating filter frame 3, nor does it affect the operation of the rotating filter frame 3. In addition, a mesh hole (not shown) is also provided on the right sealing plate 107 to discharge the moisture in the drying chamber 113. Through the operation of the heating pipe 10, the filter screen 401 and the rotating filter frame 3 in the drying chamber 113 can be dried. The purpose is to solve the problem that the liquid droplets and water vapor carried in the coalbed methane cause the coal ash to become damp and adhere to the filter screen 401, the rotating filter frame 3, and the coal ash collection box 2, making it difficult to clean and collect.

[0058] In this embodiment, the rotating filter frame 3 is driven by the motor 5 to realize the conversion of the filter material 4 in the filter chamber 110, so as to efficiently filter out coal ash in the coalbed methane. In order to achieve automatic control of the conversion of filter material 4, the device in this embodiment also includes a controller (not shown) and a differential pressure sensor (not shown). The controller is electrically connected to the differential pressure sensor, the motor 5, the dryer, and the electromagnetic pulse valve 7. The differential pressure sensor is used to measure the pressure difference between the air inlet pipe 108 and the air outlet pipe 109 at the left and right ends of the device. When the pressure difference is large, it indicates that the amount of coal ash accumulated in the filter chamber between the filter material 4 and the air inlet is large, causing congestion, which in turn leads to the difference in air pressure in the two pipelines. The differential pressure sensor transmits the measurement signal to the controller, which controls the motor 5 to start and stop, driving the rotating filter frame 3 to move, realizing the conversion of the filter material 4 in the filter chamber 110 and automatically discharging the coal ash into the coal ash collection box 2.

[0059] The working principle of the pulverized coal filtration and collection device in this embodiment is as follows:

[0060] like Figure 9As shown, coalbed methane transported via pipeline 19 enters housing 1 through inlet pipe 108. Subsequently, as the coalbed methane passes through filter chamber 110, coal ash is filtered out and retained in the filter cavity between filter media 4 and the inlet. The purified coalbed methane permeates filter media 4 and exits through the outlet, entering the pipeline 19 system. During operation, when the differential pressure sensor detects excessive coal ash accumulation in the filter cavity between filter media 4 and the inlet, motor 5 drives the rotating filter frame 3 to switch between filter media 4 and partition plate 302 in filter chamber 110. During this switching process, filter chamber 110... The new filter material 4 comes from the drying chamber 113, while the used filter material 4 enters the back-jet cleaning chamber 111 for cleaning. The coal ash that was originally in the back-jet cleaning chamber 111 enters the disassembly chamber 112 along with the partition 302, and falls into the coal ash collection box 2 through the ash discharge port 101 and the opening 201. The filter material 4 and the partition 302 that were originally in the disassembly chamber 112 are transferred to the drying chamber 113 to dry the filter material 4, the partition 302, the coal ash collection box 2, and the "stubborn" coal ash that have been moistened by the coalbed methane, so as to better achieve the cleaning and collection of coal ash.

[0061] When it is necessary to clean out the coal ash in the coal ash collection box 2, push the coal ash collection box 2 circumferentially to the side of the shell 1, and then open the screw cap 203 at the lower end. The coal ash can be placed in a container. This can effectively prevent the spread of coal ash from affecting and harming the operators. The coal ash collection box 2 has a good coal ash prevention effect.

[0062] Example 2

[0063] Based on Example 1, such as Figure 10 As shown, to facilitate the assembly and disassembly of the filter material 4, the opening arc of the ash discharge port 101 in this embodiment must be at least greater than 90°, preferably 135°-180°. To achieve the purpose of this embodiment, the filter material 4 includes an outer frame 402 disposed on the outer edge of the filter screen 401 and an arc-shaped plate 403 disposed on one side of the inner end of the filter material 4. The arc-shaped plate 403 is vertically fixedly connected to the outer frame 402. The arc-shaped plate 403 is located on one side of the air outlet 103. A strip groove 303 is provided on both sides of the partition plate 302. A cavity 304 is provided on the side of the pivot 301 between two adjacent partition plates 302. One end of the groove extends to the outer edge of the partition plate 302. One end extends to connect with the cavity 304. The two sides of the outer frame 402 are respectively engaged in the corresponding slots. The arc plate 403 is fitted into the cavity 304. Two screw holes 305 are radially opened on the rotating shaft 301 in the cavity 304. Two through holes 404 corresponding to the screw holes 305 are opened on the arc plate 403. Each through hole 404 is provided with a bolt (not shown). One end of the bolt is threaded into the screw hole 305 to achieve the purpose of fixing and disassembling the filter material 4.

[0064] Example 3

[0065] Based on Example 1, such as Figures 11-12 As shown, this embodiment also includes a positioning mechanism for fixing the coal ash collection box 2. The positioning mechanism includes a hinge base 11, an active claw 12, a driven claw 13, and a torsion spring 16. The bottom of the hinge base 11 is fixedly connected to the top of the housing 1. One end of the active claw 12 is fixedly connected to the upper end of the coal ash collection box 2, and the back of the active claw 12 abuts against the outer side wall of the housing 1. The other end of the active claw 12 is provided with a wedge-shaped lower claw 14. One end of the driven claw 13 is hinged to the upper part of the hinge base 11 through a hinge shaft 17. With its back facing upward, the driven claw 13 has a wedge-shaped upper claw 15 at the other end that engages with the upper claw 15. One end of the torsion spring 16 is connected to the inner side of the hinge seat 11, and the other end is connected to the hinge shaft 17. The torsion spring 16 is used to rotate and reset the hinge shaft 17. When the upper claw 15 and the lower claw 14 engage with each other, there is a gap between the lower claw 14 and the hinge seat 11. This gap is used for the movement of the active claw 12, which flips the driven claw 13 upward, thereby achieving the "disengagement" connection between the active claw 12 and the driven claw 13.

[0066] In this embodiment, the circumferentially pushed coal ash collection box 2 moves upward from the ash discharge port 101. The upper claw 15 and the lower claw 14 begin to abut against each other. During the abutment process, the lower claw 14 continues to slide towards the hinge seat 11, and the upper claw 15 is continuously subjected to force, causing the driven claw 13 to rotate upward until the upper claw 15 and the lower claw 14 are engaged and the pushing stops, thereby fixing the coal ash collection box 2. When it is necessary to close the ash discharge port 101 and restore the coal ash collection box 2 to the position below the shell 1, the active claw 12 is first pushed circumferentially towards the hinge seat 11, and then the driven claw 13 is flipped upward to release the active claw 12. Under the action of gravity, the coal ash collection box 2 can freely fall and slide to the ash discharge port 101.

[0067] In the description of this invention, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "top," "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. It should also be noted that, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly, for example, as fixed connections, detachable connections, or integral connections; as mechanical connections or electrical connections; as direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0068] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A coalbed methane gathering coal ash filtering and collecting device, characterized in that, The utility model discloses a cylindrical shell is set up vertically, and the both ends of the shell are closed structure, and the arc-shaped ash outlet is set up in the bottom of the shell, and the air inlet and the air outlet are respectively arranged on the closed structure of the both ends of the shell, and the rotating filter frame is arranged in the inner chamber of the shell, and the plurality of filter materials for filtering the coal ash flowing through the inner chamber of the shell are arranged on the rotating filter frame, and the rotating filter frame is driven by the motor arranged outside the shell, and the coal ash between the filter material and the air inlet can be transported to the ash outlet in the bottom of the shell under the rotation of the rotating filter frame. The coal ash collecting box is arranged below the ash outlet and is used for closing the ash outlet and collecting the coal ash, and the coal ash collecting box is movably arranged on the outer wall of the shell and is used for opening the ash outlet and automatically dumping the coal ash in the coal ash collecting box by gravity. The closed structure of the both ends of the shell is arranged by the left sealing plate and the right sealing plate, the air inlet is arranged at the eccentric position of the upper portion of the left sealing plate and is connected with the air inlet pipe, the air outlet is arranged at the eccentric position of the upper portion of the right sealing plate and is connected with the air outlet pipe, the air inlet pipe and the air outlet pipe correspond to each other, the rotating filter frame comprises the rotating shaft in the center and the four partition plates arranged vertically along the length direction of the rotating shaft, the four partition plates are arranged in the radial direction of the rotating shaft in the annular array, the two side portions of the partition plate are respectively connected with the inner side portions of the closed structures of the both ends of the shell, the outer side portions of the partition plate are connected with the inner walls of the shell, the two adjacent partition plates, the closed structures of the both ends of the shell and the inner walls of the shell form the closed chamber, the chamber comprises the filter chambers on the upper two sides, the back-blowing chambers and the drying chambers and the disassembling chambers on the lower two sides, the ash outlet is communicated with the disassembling chambers on the two sides of the filter material and is only communicated with the drying chamber on the air inlet side of the filter material, the rotating shaft is rotatably connected with the centers of the left sealing plate and the right sealing plate, the motor is fixedly arranged on the outer side portion of the right sealing plate, the right bearing is arranged in the center of the right sealing plate, the left bearing is arranged in the center of the left sealing plate, one end of the rotating shaft extends to the outer side of the right sealing plate through the right bearing and is connected with the power output shaft of the motor, and the other end of the rotating shaft is connected with the rotation center of the left bearing. The four filter materials are arranged in the quarter circle shape, the four filter materials are clamped between the two adjacent partition plates, the two side portions of the filter material are abutted with the corresponding partition plates, the arc-shaped outer side portion of the filter material is connected with the inner wall of the shell, the inner end of the filter material is connected with the rotating shaft, the filter material comprises the filter screen in the center for filtering the coal ash, and the filter material is arranged at the middle side position in the axial direction of the rotating shaft. The right sealing plate is provided with a back-blowing mechanism for back-blowing the filter screen in the back-blowing chamber. The back-blowing mechanism comprises a blowing pipe, an electromagnetic pulse valve and a gas storage bag fixedly installed on the outer side of the right sealing plate. One end of the blowing pipe is connected with the gas storage bag, the other end of the blowing pipe is inserted into the right sealing plate and communicates with the back-blowing chamber, the blowing end of the blowing pipe points to the filter screen, the electromagnetic pulse valve is arranged on the blowing pipe line, the blowing pipe is located obliquely above the motor and is arranged opposite to the air outlet hole; the right sealing plate is provided with a dryer below the air outlet pipe. The dryer is used for drying the filter screen in the drying chamber. A strip-shaped mounting hole is formed in the right sealing plate and communicates with the drying chamber. The dryer is embedded in the mounting hole. The dryer comprises an outer cover exposed on the outer side of the right sealing plate and a heating pipe built in the inner side of the right sealing plate. The heating pipe is used for drying the drying chamber and the space communicated therewith. The right sealing plate is provided with mesh holes for discharging the moisture in the drying chamber.

2. The coalbed gas gathering coal ash filtering and collecting device according to claim 1, characterized in that, The coal ash collecting box is an arc-shaped box body attached to the outer circumferential sidewall of the shell. The side of the coal ash collecting box close to the shell is open. The opening is used for the coal ash to fall into the box cavity of the coal ash collecting box. Two arc-shaped sliding rails are respectively arranged in cooperation with the two ends of the outer circumferential sidewall of the shell. The arc-shaped sliding rails are provided with arc-shaped sliding grooves. The coal ash collecting box is clamped between the two arc-shaped sliding rails. A plurality of arc-shaped sliding blocks are arranged on the two side portions of the coal ash collecting box. The arc-shaped sliding blocks are inserted into the corresponding arc-shaped sliding grooves. The coal ash collecting box can slide along the outer circumferential sidewall of the shell by being pushed in a ring direction.

3. The coalbed gas gathering coal ash filtering and collecting device according to claim 2, characterized in that, A dust discharging pipe is connected to the lower end of the coal ash collecting box. One end of the dust discharging pipe communicates with the box cavity of the coal ash collecting box. The other end of the dust discharging pipe is provided with a screw cap.

4. The coalbed gas gathering coal ash filtering and collecting device according to claim 3, characterized in that, The positioning mechanism for fixing the coal ash collecting box comprises a hinge base, a driving claw, a driven claw and a torsional spring. The hinge base is fixedly connected to the top of the shell. One end of the driving claw is fixedly connected to the upper end of the coal ash collecting box. The back portion of the driving claw abuts against the outer circumferential sidewall of the shell. The other end of the driving claw is provided with a wedge-shaped lower claw. One end of the driven claw is hingedly connected to the upper portion of the hinge base through a hinge shaft. The back portion of the driven claw faces upward. The other end of the driven claw is provided with a wedge-shaped upper claw which is matched with the upper claw. One end of the torsional spring is connected to the inner side of the hinge base. The other end of the torsional spring is connected to the hinge shaft. The torsional spring is used for rotating the hinge shaft to reset. When the upper claw and the lower claw are matched with each other, a space exists between the lower claw and the hinge base. The space is used for the movement of the driving claw.

5. The coalbed gas gathering coal ash filtering and collecting device according to claim 1, characterized in that, The opening arc of the dust discharging port is preferably 135°-180°.

6. The coalbed gas gathering coal ash filtering and collecting device according to claim 5, characterized in that, The filter material comprises an outer frame arranged at the outer edge of the filter screen and an arc-shaped plate arranged at one side of the inner end of the filter material, the arc-shaped plate is vertically fixedly connected with the outer frame, the arc-shaped plate is located at the air outlet side, a linear clamping groove is arranged on the plate surface of each of the two sides of the partition plate, a recess is arranged on the shaft side between the two adjacent partition plates, one end of the clamping groove extends to the outer side of the partition plate, the other end of the clamping groove extends to the recess, the two side edges of the outer frame are respectively clamped in the corresponding clamping grooves, the arc-shaped plate is embedded in the recess, two screw holes are arranged on the shaft in the recess along the radial direction of the shaft, two through holes corresponding to the screw holes are arranged on the arc-shaped plate, and a bolt is arranged in each through hole and is threadedly connected with the screw hole.

7. The coalbed gas gathering coal ash filtering and collecting device according to claim 1, characterized in that, The controller is electrically connected with the pressure difference sensor, the motor, the dryer and the electromagnetic pulse valve, and the pressure difference sensor is used for measuring the pressure difference between the left and right inlet pipes and the outlet pipe of the device.

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