Coal bed gas filtering device

Abstract

The utility model discloses a coalbed methane filtering device which comprises a circular shell with an opening at the top and a sealing plate fixedly arranged at the top of the circular shell, the right side of the bottom of the circular shell is fixedly communicated with an L-shaped coalbed methane inlet connecting pipe, and the right side of the top of the sealing plate is fixedly embedded with an exhaust connecting pipe communicated with the inside of the circular shell. By arranging a series of structures, pulverized coal particle impurities in coal bed gas can be filtered and intercepted, the filter screens on the two sides can be conveniently and automatically exchanged and alternately utilized in a timing mode, the used filter screens are sequentially subjected to back flushing, dredging, deslagging and air drying, and the coal bed gas purification efficiency is improved through the mode that the filter screens are exchanged, alternately utilized and sequentially subjected to back flushing, dredging, deslagging and air drying. According to the device, the filter screen can be cleaned and dredged cleanly and effectively, the phenomenon that pulverized coal particle impurities are blocked into filter holes of the filter screen is reduced, the cleaning and dredging effect is improved, slag removal work can be conducted without shutdown, unmanned non-stop automatic dredging and slag removal work is achieved, and the use automation degree and convenience are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of coal bed gas filtering, in particular to a coal bed gas filtering device. Background Art

[0002] Coalbed methane refers to hydrocarbon gas stored in coal seams with methane as the main component, mainly adsorbed on the surface of coal matrix particles, and partially free in coal pores or dissolved in coalbed water. It is a coal-associated mineral resource and an unconventional natural gas. Since coalbed methane mining will destroy the integrity of coal rock, coal powder will inevitably enter the gathering and transportation pipeline network and mix into the coalbed methane. The coal powder mixed in the coalbed methane can easily damage equipment such as compressors, cause production equipment damage and failure, and reduce production efficiency. Therefore, it is very necessary to install filtering equipment between the compressor and the gathering and transportation pipeline. Most of the existing coalbed methane gathering and filtering devices use a filter box and a filter screen for filtering. However, after the filter screen has been used for a long time, coal powder will accumulate on the air inlet side of the filter screen, causing blockage and affecting the coalbed methane transportation, so the filter screen needs to be cleaned regularly.

[0003] In this regard, a search by a new information search agency revealed that announcement number CN221051805U discloses a coalbed methane gathering and filtering device, comprising a filter shell, support legs are fixedly installed on both sides of the lower surface of the filter shell by bolts, and mounting plates are fixedly connected to the opposite sides of the two support legs, and a driving motor is fixedly connected to the surface of the mounting plate, and a driving rod is fixedly connected to the output end of the driving motor, and the interior of the filter shell is respectively fixedly connected with corresponding first and second filter screens; by setting structures such as cleaning brushes, it realizes the transportation of coalbed methane through the air intake pipe and the conveying mechanism, and filters the coalbed methane multiple times through the first and second filter screens, so that impurities in the coalbed methane are filtered more thoroughly, and at the same time, the driving motor is started so that the driving rod drives the rotating rod to rotate synchronously, so that the cleaning brush cleans the surface of the first and second filter screens.

[0004] The above technology discloses a coalbed methane gathering and transmission filtering device, which realizes brushing and cleaning of the tops of the first filter screen and the second filter screen by arranging a rotatable cleaning brush, and then removes the sealing gasket to discharge the cleaned impurities. However, it has the following shortcomings when used: 1. When simply cleaning by brushing the cleaning brush, there is a phenomenon that the coal powder particle impurities are squeezed and stuck in the filter holes of the filter screen by the brush, making it difficult to clean and dredge the filter screen cleanly and effectively, and the cleaning and dredging effect is not ideal; 2. (The impurities are discharged by removing the sealing gasket. When the sealing gasket is removed, the inside and outside of the filter housing are connected, causing a large amount of coalbed methane to be discharged from the hole where the sealing gasket is inserted during coalbed methane transportation, and it is still necessary to stop production and stop the machine for cleaning), it cannot realize unmanned and non-stop automatic dredging and slag removal work, and the degree of automation and convenience of use are not ideal. In view of this, the present application proposes a coalbed methane filtering device to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a coal bed gas filtering device to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a coalbed methane filtering device, comprising a circular shell with an opening at the top and a sealing plate fixedly installed on the top of the circular shell, an L-shaped coalbed methane inlet pipe connected and fixed to the right side of the bottom of the circular shell, an exhaust pipe connected to the inside of the circular shell embedded and fixed on the right side of the top of the sealing plate, a circular seat movably sleeved in the circular shell, air holes are opened on both sides of the top of the circular seat, two filter screens are fixedly installed in the air holes, the exhaust pipe and the L-shaped coalbed methane inlet pipe are vertically aligned and connected to the air hole on the right, the L-shaped coalbed methane inlet pipe is used to allow coalbed methane to pass into the air hole on the right, and the two filter screens on the right are used to filter and intercept coal powder particle impurities in the coalbed methane;

[0007] A PLC controller is fixedly installed on the left side of the top of the sealing plate, a servo motor whose output shaft is fixedly connected to the center position of the top of the circular seat is fixedly installed on the top of the sealing plate, the servo motor is electrically connected to the PLC controller, a cleaning and air-drying component connected to the air vent on the left is embedded and fixed on the left side of the top of the sealing plate, a slag discharge hole connected to the air vent on the left is opened on the bottom inner wall of the circular shell, a slag collecting, filtering and storing component is arranged below the slag discharge hole, a water pump is fixedly installed on the left side of the slag collecting, filtering and storing component, and the cleaning and air-drying component and the water pump are both electrically connected to the PLC controller The servo motor is controlled by the PLC controller to start half a circle at a fixed time to drive the circular seat to rotate half a circle at a fixed time. The circular seat is used to drive the filter screens on both sides to rotate and exchange for alternating use. The cleaning and air-drying component is combined with a water pump to be controlled by the PLC controller to periodically flush and air-dry the filter screen on the left side in turn. The slag filtering and water storage component is used to filter impurities in the sewage generated by flushing and recycle the water. The filter screens on both sides are rotated and exchanged and the filter screen on the left side is always flushed and air-dried to realize unmanned and non-stop automatic dredging and slag cleaning work.

[0008] Preferably, the cleaning and air-drying component includes a fixed box embedded and fixed on the left side of the top of the sealing plate, a plurality of nozzles are connected and fixed to the bottom of the fixed box, the nozzles are located above the air vent on the left, a U-shaped conduit is connected and fixed to the left side of the top of the fixed box, the bottom left end of the U-shaped conduit is connected and fixed to the water outlet of the water pump, an air pump is fixedly installed on the top of the fixed box, a one-way valve with the bottom as the outlet is connected and fixed between the air outlet of the air pump and the top of the fixed box, and the air pump is electrically connected to the PLC controller.

[0009] Preferably, the slag collecting, filtration and storage assembly includes a water tank arranged below the slag discharge hole, the top of the water tank is arranged to be an opening, support blocks are fixedly connected to the inner walls on both sides of the water tank, the tops of the two support blocks are movably in contact with a stainless steel filter screen that is movably sleeved in the water tank, T-shaped pull rods are fixedly connected to both sides of the top of the stainless steel filter screen, a drain valve is connected and fixed to the right bottom of the water tank, a water pump is fixedly installed on the left bottom of the water tank, and the water inlet of the water pump extends into the water tank.

[0010] Preferably, the PLC controller is a timer programmable controller, and the PLC controller is used for personnel to pre-set the time for controlling the start of the servo motor, the start and stop of the water pump, and the start and stop of the air pump according to cleaning needs, and based on the principle of rinsing first and then air drying, the start and stop time of the air pump is after the start and stop time of the water pump.

[0011] Preferably, sealing pads are bonded and fixed to the top and bottom of the circular seat, and the repelling sides of the two sealing pads are in active contact with the bottom of the sealing plate and the bottom inner wall of the circular shell respectively. The top of the sealing pad is provided with two circular holes respectively connected to the corresponding ventilation holes.

[0012] Preferably, the bottom of the circular shell is annular and fixedly connected with four legs at equal intervals.

[0013] Preferably, the mesh openings of the upper filter screen are smaller than the mesh openings of the lower filter screen.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. This coal bed gas filtering device can filter and intercept coal powder particle impurities in coal bed gas through the cooperation of the circular shell, L-shaped coal bed gas inlet pipe, exhaust pipe, circular seat, vent hole and filter screen;

[0016] 2. The coalbed methane filtering device can automatically and regularly replace the filters on both sides for alternate use through the cooperation of the circular shell, circular seat, filter, PLC controller, servo motor, water pump, cleaning and air-drying component, slag discharge hole and slag filtering water storage component, and can sequentially backwash and dredge the used filters for slag discharge and air-drying. By replacing and coordinating the backwash and dredge and sequentially backwash and dredge and air-drying, the filter can be cleanly and effectively cleaned and dredged, and the phenomenon of coal powder particle impurities being stuck in the filter holes of the filter can be reduced, thereby improving the cleaning and dredging effect. In addition, the filter on both sides can be automatically and regularly used and cleaned alternately, without stopping the machine for slag cleaning, thereby realizing unmanned automatic dredging and slag cleaning work without stopping production, thereby improving the degree of automation and convenience in use.

[0017] The utility model is capable of filtering and intercepting coal powder particle impurities in coalbed methane by being provided with a series of structures, and is convenient for automatically and regularly replacing the filter screens on both sides for alternate use, and sequentially recoil-clearing, dredging, deslagging and air-drying the used filter screens. By replacing and alternately utilizing the filter screens in conjunction with sequential recoil-clearing, dredging, deslagging and air-drying, the filter screens can be cleanly and effectively cleaned and dredged, and the phenomenon of coal powder particle impurities being stuck in the filter holes of the filter screen can be reduced, and the cleaning and dredging effect can be improved. There is no need to stop the machine for deslagging work, and unmanned, automatic deslagging and dredging work can be realized without stopping production, thereby improving the degree of automation and convenience in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a three-dimensional structural schematic diagram of a coal bed gas filtering device proposed by the utility model;

[0019] Figure 2 for Figure 1 Schematic diagram of the structure viewed from above;

[0020] Figure 3 This is a schematic diagram of the main cross-sectional structure of a coal bed gas filtering device proposed by the utility model.

[0021] In the figure: 1. circular shell; 101. L-shaped coalbed methane inlet pipe; 102. exhaust pipe; 2. sealing plate; 3. circular seat; 4. air vent; 5. filter screen; 6. slag discharge hole; 7. fixing box; 8. nozzle; 9. PLC controller; 10. air pump; 11. one-way valve; 12. U-shaped guide tube; 13. water pump; 14. servo motor; 15. water storage tank; 16. stainless steel filter screen. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] like Figures 1 to 3 As shown, a coalbed methane filtering device proposed in this embodiment includes a circular shell 1 with an opening at the top and a sealing plate 2 fixedly installed on the top of the circular shell 1, an L-shaped coalbed methane inlet pipe 101 is connected and fixed to the right side of the bottom of the circular shell 1, and an exhaust pipe 102 connected to the inside of the circular shell 1 is embedded and fixed on the right side of the top of the sealing plate 2, a circular seat 3 is movably sleeved in the circular shell 1, and ventilation holes 4 are opened on both sides of the top of the circular seat 3, and two filter screens 5 are fixedly installed in the ventilation holes 4, the exhaust pipe 102 and the L-shaped coalbed methane inlet pipe 101 are both vertically aligned and connected to the ventilation holes 4 on the right, wherein the top and bottom of the circular seat 3 are bonded and fixed with sealing pads, and the two The repelling sides of the sealing rubber pad are in active contact with the bottom of the sealing plate 2 and the bottom inner wall of the circular shell 1 respectively. The top of the sealing rubber pad is provided with two circular holes respectively connected with the corresponding vent holes 4. The two sealing rubber pads are arranged to play the role of active sealing between the circular seat 3 and the sealing plate 2 and the bottom inner wall of the circular shell 1. The bottom of the circular shell 1 is annular and fixedly connected with four legs at equal intervals, which plays the role of supporting the circular shell 1. The mesh of the filter screen 5 located above is smaller than that of the filter screen 5 below. The L-shaped coal bed gas inlet pipe 101 is used to allow the coal bed gas to pass into the vent hole 4 on the right, and the two filter screens 5 on the right are used to filter and intercept the coal powder particle impurities in the coal bed gas.

[0024] A PLC controller 9 is fixedly installed on the left side of the top of the sealing plate 2, a servo motor 14 whose output shaft is fixedly connected to the center position of the top of the circular seat 3 is fixedly installed on the top of the sealing plate 2, and the servo motor 14 is electrically connected to the PLC controller 9. A cleaning and air-drying component connected to the air vent 4 on the left is embedded and fixed on the left side of the top of the sealing plate 2, a slag discharge hole 6 connected to the air vent 4 on the left is opened on the bottom inner wall of the circular shell 1, and a slag collection, filtration and water storage component is arranged below the slag discharge hole 6. A water pump 13 is fixedly installed on the left side of the slag collection, filtration and water storage component, and the cleaning and air-drying component and the water pump 13 are both connected to the PLC controller The device 9 is electrically connected, and the servo motor 14 is controlled by the PLC controller 9 to start half a circle at a time to drive the circular seat 3 to rotate half a circle at a time. The circular seat 3 is used to drive the filter screens 5 on both sides to rotate and exchange for alternating use. The cleaning and air-drying component is combined with the water pump 13 to be controlled by the PLC controller 9 to perform regular flushing and air-drying of the filter screen 5 on the left side in turn. The slag filtering and water storage component is used to filter impurities in the sewage generated by flushing and recycle water. The filter screens 5 on both sides are rotated and exchanged and the filter screen 5 on the left side is always flushed and air-dried to realize unmanned and non-stop automatic dredging and slag cleaning work.

[0025] Specifically, the cleaning and air-drying assembly includes a fixed box 7 embedded and fixed on the left side of the top of the sealing plate 2, a plurality of nozzles 8 are connected and fixed to the bottom of the fixed box 7, and the nozzles 8 are located above the vent hole 4 on the left side. A U-shaped conduit 12 is connected and fixed to the left side of the top of the fixed box 7, and the bottom left end of the U-shaped conduit 12 is connected and fixed to the water outlet of the water pump 13. An air pump 10 is fixedly installed on the top of the fixed box 7, and a one-way valve 11 with the bottom as the outlet is connected and fixed between the air outlet of the air pump 10 and the top of the fixed box 7. The air pump 10 is connected to the PLC. The controller 9 is electrically connected; the fixed box 7, the nozzle 8, the U-shaped conduit 12, the air pump 10 and the one-way valve 11 are arranged to cooperate. When the water pump 13 is started, water is supplied to the fixed box 7 through the U-shaped conduit 12. The water is sprayed downward through multiple nozzles 8 to backwash and clean the filter screen 5 on the left side. After the water pump 13 is turned off, the air pump 10 supplies air to the fixed box 7 through the one-way valve 11. The gas is blown downward through multiple nozzles 8 to air-dry the cleaned left filter screen 5, thereby achieving the effect of flushing and air-drying the filter screen 5 on the left side in turn.

[0026] Furthermore, the slag collection, filtration and storage assembly includes a water tank 15 arranged below the slag discharge hole 6, the top of the water tank 15 is arranged to be open, and support blocks are fixedly connected to the inner walls on both sides of the water tank 15, and the tops of the two support blocks are movably in contact with a stainless steel filter 16 movably sleeved in the water tank 15, and both sides of the top of the stainless steel filter 16 are fixedly connected with T-shaped pull rods, and the right bottom of the water tank 15 is connected and fixed with a drain valve, and the water pump 13 is fixedly installed at the left bottom of the water tank 15, and the water inlet of the water pump 13 extends into the water tank 15; the water tank 15, support blocks, and stainless steel The filter screen 16, the stainless steel filter screen 16 and the drain valve cooperate with each other, and the slag discharge hole 6 is used to discharge the sewage generated by flushing downward, and the stainless steel filter screen 16 is used to filter and intercept solid impurities in the sewage, so that the water passes downward and is collected in the water storage tank 15, so as to filter impurities from the sewage generated by flushing to achieve the effect of water recycling; wherein the stainless steel filter screen 16 is movably sleeved in the water storage tank 15, so that it is convenient for subsequent personnel to remove it for cleaning work, and the drain valve is provided for personnel to release the water in the water storage tank 15 after long-term use, so as to add water to the water storage tank 15 again for water replacement work.

[0027] Furthermore, the PLC controller 9 is a timer programmable controller, and the PLC controller 9 is configured to allow personnel to pre-set the time for starting the servo motor 14, starting and closing the water pump 13, and starting and closing the air pump 10 according to cleaning needs, and based on the principle of rinsing first and then air drying, the start and close time of the air pump 10 is after the start and close time of the water pump 13; wherein the servo motor 14 is set to start half a circle each time, and the start and close interval time of the water pump 13 and the air pump 10 are both fifteen seconds.

[0028] The method of using the present embodiment is as follows: when the coalbed methane filtering device is used, the L-shaped coalbed methane inlet pipe 101 is pre-connected with the external coalbed methane supply pipeline, and the exhaust pipe 102 is connected with the external pipeline supplying the compressor, and the L-shaped coalbed methane inlet pipe 101 is used to allow the coalbed methane to pass into the right vent hole 4, and the two filter screens 5 on the right are used to filter and intercept the coal powder particle impurities in the coalbed methane, and the exhaust pipe 102 is used to transport the filtered coalbed methane to the subsequent compressor equipment, so as to achieve the purpose of filtering and intercepting the coal powder particle impurities in the coalbed methane;

[0029] The PLC controller 9 is used to pre-set the time for starting the servo motor 14, starting and closing the water pump 13, and starting and closing the air pump 10 according to the cleaning interval requirements in advance, and according to the principle of rinsing first and then air drying, the start and close time of the air pump 10 is after the start and close time of the water pump 13, wherein the servo motor 14 is set to start half a circle each time, and the start and close interval time of the water pump 13 and the air pump 10 are both fifteen seconds. When the cleaning time is reached, the PLC controller 9 controls the servo motor 14 and the water pump 13 to start, and the servo motor 14 drives the circular seat 3 to rotate half a circle, and the circular seat 3 drives the two The filter screens 5 on the left and right sides are rotated and exchanged for alternate use, so that the filter screen 5 originally located on the left side rotates to the right side to continue filtering, and the filter screen 5 originally located on the right side after use rotates to the left side. When the water pump 13 is started, water in the water storage tank 15 is pumped into the fixed box 7 through the U-shaped conduit 12, and the water is sprayed downward through multiple nozzles 8 to recoil and clean the filter screen 5 on the left side. After fifteen seconds, the PLC controller 9 controls the water pump 13 to close and controls the air pump 10 to start. The air pump 10 supplies air to the fixed box 7 through the one-way valve 11. When the gas is blown downward through multiple nozzles 8 to air dry the cleaned left filter 5, after fifteen seconds, the PLC controller 9 controls the air pump 10 to turn off and wait for the next cleaning time to start the replacement cleaning work again, wherein the sewage formed by flushing is discharged downward through the slag discharge hole 6, and the solid impurities in the discharged sewage are filtered and intercepted by the stainless steel filter 16, so that the water passes downward through the stainless steel filter 16 and is collected in the water storage tank 15, so as to filter the impurities of the sewage generated by flushing to achieve the effect of water recycling and save water resources; it is convenient to automatically and regularly replace the filter nets 5 on both sides for alternate use, and the used filter nets 5 are backwashed, dredged and air dried in turn. By replacing and coordinating the backwashing, dredging, dredging and air drying in turn, the filter net 5 can be cleaned and dredged cleanly and effectively, and the phenomenon of coal powder particle impurities being stuck in the filter holes of the filter net 5 is reduced, and the cleaning and dredging effect is improved; in addition, the filter nets 5 on both sides are automatically and regularly used and cleaned, without stopping the machine for slag removal, and unmanned automatic dredging and slag removal work is realized, which improves the degree of automation and convenience of use.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A coal bed gas filtering device, comprising a circular housing (1) with an opening at the top and a sealing plate (2) fixedly mounted on the top of the circular housing (1), characterized in that: An L-shaped coalbed methane inlet pipe (101) is connected and fixed to the right side of the bottom of the circular shell (1); an exhaust pipe (102) connected to the inside of the circular shell (1) is embedded and fixed to the right side of the top of the sealing plate (2); a circular seat (3) is movably sleeved inside the circular shell (1); ventilation holes (4) are provided on both sides of the top of the circular seat (3); two filter screens (5) are fixedly installed in the ventilation holes (4); the exhaust pipe (102) and the L-shaped coalbed methane inlet pipe (101) are both vertically aligned and connected to the ventilation hole (4) on the right side; A PLC controller (9) is fixedly installed on the left side of the top of the sealing plate (2); a servo motor (14) whose output shaft is fixedly connected to the center position of the top of the circular seat (3) is fixedly installed on the top of the sealing plate (2); the servo motor (14) is electrically connected to the PLC controller (9); a cleaning and air-drying component connected to the air vent (4) on the left side is embedded and fixed on the left side of the top of the sealing plate (2); a slag discharge hole (6) connected to the air vent (4) on the left side is opened on the bottom inner wall of the circular shell (1); a slag collection, filtration and water storage component is arranged below the slag discharge hole (6); a water pump (13) is fixedly installed on the left side of the slag collection, filtration and water storage component; the cleaning and air-drying component and the water pump (13) are both electrically connected to the PLC controller (9).

2. A coal bed gas filtering device according to claim 1, characterized in that: The cleaning and air-drying assembly comprises a fixed box (7) embedded and fixed on the left side of the top of the sealing plate (2); a plurality of nozzles (8) are connected and fixed at the bottom of the fixed box (7); the nozzles (8) are located above the vent hole (4) on the left side; a U-shaped conduit (12) is connected and fixed at the left side of the top of the fixed box (7); the left end of the bottom of the U-shaped conduit (12) is connected and fixed to the water outlet of a water pump (13); an air pump (10) is fixedly installed at the top of the fixed box (7); a one-way valve (11) with the bottom as an outlet is connected and fixed between the air outlet of the air pump (10) and the top of the fixed box (7); and the air pump (10) is electrically connected to a PLC controller (9).

3. A coal bed gas filtering device according to claim 2, characterized in that: The slag collection, filtration and storage assembly comprises a water tank (15) arranged below the slag discharge hole (6), the top of the water tank (15) being arranged to be open, support blocks being fixedly connected to the inner walls on both sides of the water tank (15), the tops of the two support blocks being movably in contact with a stainless steel filter screen (16) movably sleeved in the water tank (15), T-shaped pull rods being fixedly connected to both sides of the top of the stainless steel filter screen (16), a drain valve being connected and fixedly connected to the right bottom of the water tank (15), a water pump (13) being fixedly installed at the left bottom of the water tank (15), and a water inlet of the water pump (13) extending into the water tank (15).

4. A coal bed gas filtering device according to claim 1, characterized in that: The PLC controller (9) is a time-programmable controller.

5. A coal bed gas filtering device according to claim 1, characterized in that: The top and bottom of the circular seat (3) are both bonded and fixed with sealing pads, and the repelling sides of the two sealing pads are in active contact with the bottom of the sealing plate (2) and the bottom inner wall of the circular shell (1), respectively. The top of the sealing pad is provided with two circular holes respectively connected to the corresponding ventilation holes (4).

6. A coal bed gas filtering device according to claim 1, characterized in that: The bottom of the circular shell (1) is annular and has four legs fixedly connected thereto at equal intervals.

7. A coal bed gas filtering device according to claim 1, characterized in that: The mesh openings of the filter screen (5) located at the top are smaller than the mesh openings of the filter screen (5) located at the bottom.

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