A skid-mounted multi-effect coupled coalbed methane field separation device and method

Abstract

This invention discloses a skid-mounted multi-effect coupled coalbed methane on-site separation device and method. The skid-mounted multi-effect coupled coalbed methane on-site separation device includes: a monitoring system, a cyclone separation module, a gravity settling module, a baffle plate separation module, a pipeline group, and a valve group. The monitoring system, cyclone separation module, gravity settling module, and baffle plate separation module are connected via the pipeline group, and a valve group is installed on the pipeline group. The monitoring system collects key parameters such as the concentration and flow rate of impurities in different phases of the coalbed methane to be separated, obtains the monitoring results, and controls the opening and closing of each valve in the valve group, thereby switching the connection mode between the cyclone separation module, gravity settling module, and baffle plate separation module. The different connection modes among the above three components can respectively determine the most suitable separation method for coalbed methane under different conditions.

Description

Technical Field

[0001] This invention relates to the field of coalbed methane treatment, specifically to a skid-mounted multi-effect coupled coalbed methane field separation device and method. Background Technology

[0002] During coalbed methane (CBM) extraction, gas production gradually increases in the initial stages, then gradually decreases with prolonged extraction. CBM contains a certain amount of droplets and solid particulate impurities, which negatively impact its subsequent transportation, processing, and efficient utilization. Therefore, efficient separation technologies are needed to effectively separate droplets and solid particulate impurities from CBM to ensure its quality meets the stringent requirements of different application scenarios, thereby satisfying diverse utilization needs and providing strong support for the commercial use of CBM and energy transition.

[0003] There are various existing separation devices, such as gravity settling separation, cyclone separation, and inertial baffle separation. Current technologies for coalbed methane separation typically operate with only one type of separation device. However, in special circumstances, such as large coalbed methane throughput or high or low content of impurities in a particular phase (solid or liquid), the separation efficiency and quality using a single device are insufficient to meet production requirements. Existing technologies require different separation devices for different coalbed methane conditions, which is cumbersome and complex, and fails to highlight the high flexibility and wide applicability of the separation devices.

[0004] Therefore, a skid-mounted multi-effect coupled coalbed methane field separation device and method are needed to solve the above-mentioned technical problems. Summary of the Invention

[0005] To achieve the above objectives, the present invention provides the following technical solution: a skid-mounted multi-effect coupled coalbed methane field separation device, comprising: a monitoring system, a cyclone separation module, a gravity settling module, a baffle plate separation module, a pipeline group, and a valve group;

[0006] The monitoring system, the cyclone separation module, the gravity settling module, and the baffle separation module are connected by the pipeline group, and the valve group is installed on the pipeline group.

[0007] Furthermore, as a preferred embodiment, the pipeline assembly includes: an inlet pipe, branch pipe one, branch pipe two, branch pipe three, branch pipe four, branch pipe five, branch pipe six, connecting pipe one, connecting pipe two, connecting pipe three, connecting pipe four, and an outlet pipe.

[0008] The monitoring system is connected to the inlet pipe;

[0009] One end of the branch pipe is connected to the inlet pipe, and the other end is connected to the inlet of the cyclone separation module; one end of the branch pipe is connected to the inlet pipe, and the other end is connected to the inlet of the gravity settling module; one end of the branch pipe is connected to the inlet pipe, and the other end is connected to the inlet of the baffle separation module.

[0010] One end of branch pipe four is connected to the outlet of the cyclone separation module, and the other end is connected to the discharge pipe; one end of branch pipe five is connected to the outlet of the gravity settling module, and the other end is connected to the discharge pipe; one end of branch pipe six is ​​connected to the outlet of the baffle separation module, and the other end is connected to the discharge pipe.

[0011] The cyclone separation module has a first branch at the inlet front end and a second branch at the outlet rear end; the gravity settling module has a third branch at the inlet front end and a fourth branch at the outlet rear end; and the folding plate separation module has a fifth branch at the inlet front end and a sixth branch at the outlet rear end.

[0012] The first connecting pipe is connected between the second branch and the third branch, the second connecting pipe is connected between the third branch and the sixth branch, the third connecting pipe is connected between the fifth branch and the fourth branch, and the fourth connecting pipe is connected between the first branch and the fourth branch.

[0013] Furthermore, as a preferred embodiment, the valve group includes: valve one, valve two, valve three, valve four, valve five, valve six, valve seven, valve eight, valve nine, valve ten, valve eleven, and valve twelve;

[0014] The valve is installed on the inlet pipe;

[0015] Valve 2 is installed on branch pipe 1, valve 3 is installed on branch pipe 2, and valve 4 is installed on branch pipe 3;

[0016] Valve five is installed on branch pipe four, valve six is ​​installed on branch pipe five, and valve seven is installed on branch pipe six;

[0017] The valve eight is installed on the discharge pipe;

[0018] Valve 9 is installed on connecting pipe 1, valve 10 is installed on connecting pipe 3, valve 11 is installed on connecting pipe 4, and valve 12 is installed on connecting pipe 2.

[0019] Furthermore, as a preferred embodiment, the cyclone separation module includes: a cylinder, an air inlet, a cover plate, an ash discharge pipe, an ash collection hopper, an overflow pipe, an adjusting seat, a cyclone outlet, and an adjusting cavity;

[0020] The cylinder body is divided into an air inlet section, a direct current section, a conical section and a dust collection section from top to bottom. The adjustment seat is installed at the position of the air inlet section. The adjustment seat has a hollow structure inside and its bottom end is connected to the direct current section.

[0021] The lower part of the outer wall of the adjusting seat is in contact with the inner wall of the cylinder, and the upper part of the outer wall of the adjusting seat forms the adjusting cavity between the cylinder and the outer wall of the adjusting seat. Three sets of swirling orifices are opened on the upper circumference of the outer wall of the adjusting seat, and the three sets of swirling orifices connect the adjusting cavity with the interior of the adjusting seat.

[0022] The cylinder is provided with the air inlet, which is an inlet, one end of which is connected to the branch pipe and the other end of which is connected to the adjustment chamber.

[0023] The cover plate is bolted to the top of the cylinder, and the top of the adjusting seat is connected to the cover plate;

[0024] One end of the overflow pipe passes through the cover plate and extends into the interior of the adjustment seat, while the other end is located outside the cyclone separation module and serves as its outlet.

[0025] One end of the ash discharge pipe is connected to the bottom end of the conical section of the cylinder, and the other end is connected to the ash collection hopper.

[0026] Furthermore, as a preferred embodiment, an elastic sealing ring is provided between the air inlet section and the direct current section of the cylinder, a recovery pipe is connected to the upper end of the side wall of the ash collection hopper, the end of the recovery pipe away from the ash collection hopper is connected to the adjustment chamber, and a check valve is provided in the middle of the recovery pipe.

[0027] Furthermore, as a preferred embodiment, the gravity settling module includes: a settling tank, an inlet, a drain outlet, an inclined plate assembly, a liquid-proof plate, and a vent outlet;

[0028] The inlet is located on one side of the top of the settling tank, the vent is located on the other side of the top of the settling tank, the drain is located at the bottom of the settling tank, the anti-liquid plate is installed in the settling tank near the drain and divides the settling tank into upper and lower chambers, and the inclined plate assembly is located in the upper chamber of the settling tank.

[0029] Furthermore, as a preferred embodiment, the liquid-proof plate includes: a plate body, a float valve, a lower skirt, and a locking pin;

[0030] The float valve is cap-shaped, with the bottom of the cap section abutting against the top of the plate. The straight section is placed in the mounting hole on the plate, and the bottom of the straight section is provided with the lower skirt. The cross-sectional diameter of the straight section is smaller than the cross-sectional diameter of the mounting hole. The lower skirt is located at the lower end of the plate and is provided with three sets of locking pins around its circumference.

[0031] The length of each inclined plate in the inclined plate group, which is arranged in parallel, increases from the inlet direction to the vent direction.

[0032] An air distribution anti-impact plate and a flow guide plate are installed in the upper cavity of the settling tank near the inlet position, and a baffle is installed at the top of the upper cavity of the settling tank near the position of the longest inclined plate in the inclined plate group.

[0033] The upper cavity of the settling tank is equipped with a serpentine mist-collecting pipe that communicates with the vent, and a safety valve is provided at the top of the settling tank.

[0034] Furthermore, as a preferred embodiment, the folding plate separation module includes: a separation tank, an air inlet, an exhaust outlet, a lower outlet, and a folding plate assembly;

[0035] The separation tank has an air inlet at one end and an exhaust outlet at the other end. The lower end of the separation tank has a lower discharge port, and the baffle assembly is located inside the separation tank.

[0036] Furthermore, as a preferred embodiment, the folding plate assembly includes: a base plate, a first connecting rod, a first folding plate, a second connecting rod, a second folding plate, a rack, a gear, a motor, and a slide rail;

[0037] The substrate is configured as two sets, with two sets of connecting rod 1 fixedly connected between the two sets of substrates and two sets of connecting rod 2 slidably connected. Multiple sets of folding plates 1 are equidistantly arranged between the two sets of connecting rod 1, and multiple sets of folding plates 2 are equidistantly arranged between the two sets of connecting rod 2. The bending trends of the folding plates 1 and folding plates 2 are different.

[0038] Both sets of connecting rods slidably pass through one end of each set of folding plates away from the two sets of connecting rods, and one end of each set of folding plates away from the two sets of connecting rods slidably connects to the two sets of connecting rods.

[0039] The motor is installed on the separation tank and its output shaft is sealed through the separation tank and connected to the gear. The rack is set on the connecting rod two near the bottom end of the base plate through the connecting part. The gear meshes with the rack. The slide rail is provided between the two sets of base plates. The connecting part is connected to the slide rail through the slide bar sliding clip.

[0040] An explosion-proof valve is installed on the upper part of the separation tank.

[0041] Furthermore, as a preferred embodiment, a method for a skid-mounted multi-effect coupled coalbed methane field separation device includes the following steps:

[0042] S1: Valve one is opened, and coalbed methane enters the monitoring system through the inlet pipe;

[0043] S2: The monitoring system monitors the parameters of coalbed methane and obtains the monitoring results;

[0044] S3: The monitoring system adjusts the valve assembly based on the monitoring results;

[0045] S4: The cyclone separation module, gravity settling module and baffle separation module enter the connection mode corresponding to the monitoring results obtained by the monitoring system;

[0046] S5: Open valve eight;

[0047] S6: After the coalbed methane is processed by the cyclone separation module, gravity settling module and baffle separation module, it is discharged through the discharge pipe to complete the entire separation operation.

[0048] Compared with the prior art, the present invention provides a skid-mounted multi-effect coupled coalbed methane field separation device and method, which has the following beneficial effects:

[0049] Advantage 1: The monitoring system of this invention includes pressure, flow rate, liquid phase, and solid phase monitoring modules. Each module monitors the coalbed methane to be separated in real time, collecting key parameters such as the concentration of impurities in different phases and flow rate, and deriving monitoring results. The system also includes an intelligent control system. Based on the monitoring results, the intelligent control system controls the opening and closing of valves in the valve group, thereby switching the connection modes between the cyclone separation module, gravity settling module, and baffle separation module. These different connection modes allow for the most suitable separation method for coalbed methane under different conditions, improving the overall flexibility and applicability of the separation system.

[0050] Advantage 2: The three sets of swirling inlets allow for a more uniform distribution of coalbed methane entering the adjusting seat, contributing to the formation of a symmetrical and stable rotating airflow. This reduces disturbance to the internal flow field of the swirling separation module, preventing uneven separation efficiency and uneven wear of internal components caused by eccentric airflow entering the adjusting seat. The three sets of swirling inlets balance the forces on the adjusting seat and cylinder, reducing vibration and stress concentration, adapting to potential mechanical vibration environments at the well site, and improving the overall performance and reliability of the swirling separation module. The three sets of swirling inlets also allow the swirling separation module to adapt to high-load conditions, enhancing its coalbed methane processing capacity. The swirling separation module of this invention also includes a recovery pipe to handle coalbed methane that may have escaped into the ash collection hopper.

[0051] Advantage 3: In this invention, the inclined plates arranged in the settling tank have varying lengths and are arranged in a parallel, incremental manner. By optimizing the gradual change in plate length, the gravity settling module can more precisely adapt to the settling characteristics of particles of different sizes, achieving efficient separation of impurities in coalbed methane. The settling tank is equipped with a liquid-proof plate to prevent liquid from flowing back into the upper chamber after separation, thus ensuring unidirectional transport.

[0052] Advantage 4: In this invention, the bending trends of the first and second baffle groups are different, thus forming a gradually narrowing and expanding alternating flow channel between them. The coalbed methane gas flow will experience alternating acceleration and deceleration processes within this channel, thereby changing the interaction between the droplets and the walls of the two baffle groups and improving separation efficiency. This invention can also adjust the spacing between the two baffle groups to form gradually narrowing and expanding alternating flow channels of different specifications, thereby enabling separation operations under corresponding working conditions. Attached Figure Description

[0053] Figure 1 A flowchart of a skid-mounted multi-effect coupled coalbed methane field separation method;

[0054] Figure 2 A skid-mounted multi-effect coupled coalbed methane field separation mode Figure 1 ;

[0055] Figure 3 A skid-mounted multi-effect coupled coalbed methane field separation mode Figure 2 ;

[0056] Figure 4 A skid-mounted multi-effect coupled coalbed methane field separation mode Figure 3 ;

[0057] Figure 5 A schematic diagram of the cyclone separation module of a skid-mounted multi-effect coupled coalbed methane field separation device;

[0058] Figure 6 A schematic diagram of the air inlet structure of a cyclone separation module in a skid-mounted multi-effect coupled coalbed methane field separation device;

[0059] Figure 7 A schematic diagram of the gravity settling module structure of a skid-mounted multi-effect coupled coalbed methane field separation device;

[0060] Figure 8 A schematic diagram of the anti-liquid plate structure of a gravity settling module for a skid-mounted multi-effect coupled coalbed methane field separation device;

[0061] Figure 9 A schematic diagram of a folding plate separation module structure for a skid-mounted multi-effect coupled coalbed methane field separation device;

[0062] Figure 10This is a schematic diagram of the folding plate assembly structure of a folding plate separation module in a skid-mounted multi-effect coupled coalbed methane field separation device;

[0063] In the diagram: 1. Monitoring system; 2. Cyclone separation module; 21. Cylinder; 22. Air inlet; 23. Cover plate; 24. Ash discharge pipe; 25. Ash collection hopper; 26. Overflow pipe; 27. Recovery pipe; 28. Check valve; 29. ​​Elastic sealing ring; 210. Adjusting seat; 211. Cyclone outlet; 212. Adjusting chamber; 3. Gravity settling module; 31. Inlet; 32. Liquid outlet; 33. Inclined plate assembly; 34. Liquid-proof plate; 341. Plate body; 342. Float valve; 343. Lower skirt; 344. Locking pin; 35. Air distribution anti-impact plate; 36. Guide plate; 37. Baffle; 38. Serpentine mist collection pipe; 39. Exhaust port; 4. Baffle plate separation module; 41. Air inlet; 42. Exhaust port ; 43. Lower outlet; 44. Folding plate assembly; 441. Base plate; 442. Connecting rod one; 443. Folding plate one; 444. Connecting rod two; 445. Folding plate two; 446. Rack; 447. Gear; 448. Motor; 449. Slide rail; 5. Branch pipe one; 6. Branch pipe two; 7. Branch pipe three; 8. Branch pipe four; 9. Branch pipe five; 10. Branch pipe six; 11. Connecting pipe one; 12. Connecting pipe two; 13. Connecting pipe three; 14. Connecting pipe four; 15. Valve one; 16. Valve two; 17. Valve three; 18. Valve four; 19. Valve five; 20. Valve six; 201. Valve seven; 202. Valve eight; 203. Valve nine; 204. Valve ten; 205. Valve eleven; 206. Valve twelve. Detailed Implementation

[0064] Please see Figures 1-10 This invention provides a skid-mounted multi-effect coupled coalbed methane field separation device, comprising: a monitoring system 1, a cyclone separation module 2, a gravity settling module 3, a baffle plate separation module 4, a pipeline group, and a valve group;

[0065] The monitoring system 1, the cyclone separation module 2, the gravity settling module 3, and the baffle separation module 4 are connected by a pipeline group, and a valve group is installed on the pipeline group.

[0066] In this embodiment, please refer to Figure 1 As shown, monitoring system 1 is equipped with pressure, flow rate, liquid phase, and solid phase monitoring modules. Each module monitors the coalbed methane to be separated in real time and collects key parameters such as the concentration of impurities in different phases and flow rate, thus obtaining monitoring results. Monitoring system 1 also includes an intelligent control system. This system controls the opening and closing of valves in the valve group based on the monitoring results, thereby switching the connection modes between the cyclone separation module 2, gravity settling module 3, and baffle separation module 4. The different connection modes among these three modules allow for the most suitable separation method for coalbed methane under different conditions.

[0067] It should be noted that this invention adopts a skid-mounted modular design. The entire separation device consists of one monitoring system and three separation modules. The monitoring system is the monitoring system 1, and the three separation modules are the cyclone separation module 2, the gravity settling module 3, and the baffle plate separation module 4. The above four parts are arranged on corresponding skids for easy transportation, and the parts are connected by pipe assemblies.

[0068] Furthermore, the pipeline assembly includes: inlet pipe, branch pipe 1 (5), branch pipe 2 (6), branch pipe 3 (7), branch pipe 4 (8), branch pipe 5 (9), branch pipe 6 (10), connecting pipe 1 (11), connecting pipe 2 (12), connecting pipe 3 (13), connecting pipe 4 (14), and outlet pipe.

[0069] The monitoring system 1 is connected to an inlet pipe;

[0070] One end of branch pipe 5 is connected to the inlet pipe, and the other end is connected to the inlet of cyclone separation module 2; one end of branch pipe 6 is connected to the inlet pipe, and the other end is connected to the inlet of gravity settling module 3; one end of branch pipe 7 is connected to the inlet pipe, and the other end is connected to the inlet of baffle separation module 4.

[0071] One end of branch pipe 4 8 is connected to the outlet of cyclone separation module 2, and the other end is connected to the discharge pipe; one end of branch pipe 5 9 is connected to the outlet of gravity settling module 3, and the other end is connected to the discharge pipe; one end of branch pipe 6 10 is connected to the outlet of baffle separation module 4, and the other end is connected to the discharge pipe.

[0072] The cyclone separation module 2 has a first branch at the inlet front end and a second branch at the outlet rear end; the gravity settling module 3 has a third branch at the inlet front end and a fourth branch at the outlet rear end; and the folding plate separation module 4 has a fifth branch at the inlet front end and a sixth branch at the outlet rear end.

[0073] Connecting pipe 11 connects to the second and third forks, connecting pipe 212 connects to the third and sixth forks, connecting pipe 313 connects to the fifth and fourth forks, and connecting pipe 414 connects to the first and fourth forks.

[0074] In this embodiment, rubber O-rings are installed at each joint of each pipe in the pipe assembly. These O-rings fill the tiny gaps at the pipe joints through their elastic deformation, achieving a tight seal. This effectively prevents gas leakage and maintains a good sealing effect even under high pressure differential conditions.

[0075] Furthermore, the valve assembly includes: valve 15, valve 26, valve 37, valve 48, valve 519, valve 620, valve 7201, valve 8202, valve 9203, valve 10204, valve 11205, and valve 12206.

[0076] Valve 15 is installed on the inlet pipe;

[0077] Valve 2 16 is installed on branch pipe 1 5, valve 3 17 is installed on branch pipe 2 6, and valve 4 18 is installed on branch pipe 3 7.

[0078] Valve 519 is installed on branch pipe 48, valve 620 is installed on branch pipe 59, and valve 7201 is installed on branch pipe 610.

[0079] Valve 8202 is installed on the discharge pipe;

[0080] Valve 9 203 is installed on connecting pipe 1 11, valve 10 204 is installed on connecting pipe 3 13, valve 11 205 is installed on connecting pipe 4 14, and valve 12 206 is installed on connecting pipe 2 12.

[0081] Furthermore, the cyclone separation module 2 includes: a cylinder 21, an air inlet 22, a cover plate 23, an ash discharge pipe 24, an ash collection hopper 25, an overflow pipe 26, an adjustment seat 210, a cyclone outlet 211, and an adjustment chamber 212;

[0082] The cylinder 21 is divided into an air inlet section, a direct flow section, a conical section and a dust collection section from top to bottom. An adjustment seat 210 is installed at the air inlet section. The adjustment seat 210 has a hollow structure inside and its bottom end is connected to the direct flow section.

[0083] The lower part of the outer wall of the adjusting seat 210 is in contact with the inner wall of the cylinder 21, and the upper part of the outer wall of the adjusting seat 210 forms an adjusting cavity 212 between the cylinder 21 and the upper part of the outer wall of the adjusting seat 210. Three sets of swirling orifices 211 are opened on the upper circumference of the outer wall of the adjusting seat 210, and the three sets of swirling orifices 211 connect the adjusting cavity 212 with the interior of the adjusting seat 210.

[0084] An air inlet 22 is provided on the cylinder 21. The air inlet 22 is an inlet, one end of which is connected to the branch pipe 5, and the other end is connected to the adjustment chamber 212.

[0085] A cover plate 23 is bolted to the top of the cylinder 21, and the top of the adjusting seat 210 is connected to the cover plate 23;

[0086] One end of the overflow pipe 26 passes through the cover plate 23 and extends into the interior of the adjusting seat 210, while the other end is located outside the cyclone separation module 2 and serves as its outlet.

[0087] One end of the ash discharge pipe 24 is connected to the bottom end of the conical section of the cylinder 21, and the other end is connected to the ash collection hopper 25.

[0088] For a preferred embodiment, please refer to Figure 5 , Figure 6 As shown, the cyclone separation module 2 of the present invention adopts an involute three-inlet cyclone separator, that is, three sets of cyclone ports 211 are added to the existing single-inlet cyclone separator. All three sets of cyclone ports 211 are involute and arranged in a circle.

[0089] When the dust-laden coalbed methane passes through the end of branch pipe 5, it flows through inlet 22 and enters adjustment chamber 212, where its flow direction and pressure distribution are automatically adjusted, eventually reaching a relatively uniform distribution at the three swirl inlets 211. Subsequently, the dust-laden coalbed methane enters the adjustment seat 210 in a swirling motion through the swirl channels of swirl inlets 211. It is important to note that the core function of adjustment chamber 212 is to achieve a balanced distribution of the dust-laden coalbed methane entering the three sets of swirl inlets 211 through pressure self-regulation.

[0090] The arrangement of three sets of swirl inlets 211 allows for a more uniform distribution of coalbed methane entering the adjusting seat 210, contributing to the formation of a symmetrical and stable rotating airflow. This reduces disturbance to the internal flow field of the swirl separation module 2, preventing uneven separation efficiency and uneven wear of internal components caused by eccentric airflow entering the adjusting seat 210. The three sets of swirl inlets 211 can balance the forces on the adjusting seat 210 and the cylinder 21, reducing vibration and stress concentration, adapting to possible mechanical vibration environments at the well site, and improving the overall performance and reliability of the swirl separation module 2. The three sets of swirl inlets 211 also enable the swirl separation module 2 to adapt to high-load conditions, enhancing its coalbed methane processing capacity.

[0091] The dust-laden coalbed methane will spiral downwards along the inner wall of the direct current section of cylinder 21. During this rotation, the coalbed methane generates centrifugal force, throwing dust particles with a gravity greater than the gas towards the inner wall of the direct current section of cylinder 21. Once the dust particles contact the inner wall of the direct current section of cylinder 21, they lose their inertia and, relying on momentum and downward gravity, will fall along the inner wall of cylinder 21. After passing through the ash discharge pipe 24, they are collected in the ash collection hopper 25. Workers need to clean the dust particles in the ash collection hopper 25 regularly.

[0092] After flowing through the direct current section of cylinder 21, the coalbed methane will reach the conical section of cylinder 21. Due to the contraction of the conical section, the coalbed methane will move towards the center of cylinder 21. According to the principle of conservation of angular momentum of coalbed methane in cyclone separation module 2, its tangential velocity will continuously increase. When the coalbed methane reaches a certain position at the lower end of the conical section of cylinder 21, it will continue to spiral in the same direction of rotation from bottom to top inside cylinder 21, and finally be discharged through overflow pipe 26.

[0093] Furthermore, an elastic sealing ring 29 is provided between the air inlet section and the direct flow section of the cylinder 21, and a recovery pipe 27 is connected to the upper end of the side wall of the ash collection hopper 25. The end of the recovery pipe 27 away from the ash collection hopper 25 is connected to the adjustment chamber 212, and a check valve 28 is provided in the middle of the recovery pipe 27.

[0094] In this embodiment, during the separation process of the cyclone separator 2, some gas inevitably mixes into the ash collection hopper 25, causing an increase in pressure within the ash collection hopper 25, which in turn affects the flow field within the cyclone separator 2 and interferes with the separation. Therefore, this invention provides a recovery pipe 27. The coalbed methane entering the ash collection hopper 25 will enter the recovery pipe 27. A wire mesh filter (not shown in the figure) is installed at the inlet of the recovery pipe 27 to filter this portion of the coalbed methane. A filter element is also installed at the outlet of the recovery pipe 27. Subsequently, the coalbed methane will re-enter the adjustment chamber 212 for further separation.

[0095] It should be noted that the dust particles carrying coalbed methane decrease in velocity rapidly after entering the ash collection hopper 25. Due to their high density and inertia, the solid particles will quickly settle downwards. However, coalbed methane has a low density and tends to rise and accumulate in the upper space of the ash collection hopper 25. Therefore, in this invention, the inlet of the recovery pipe 27 is located on the upper side of the ash collection hopper 25.

[0096] To prevent backflow in the recovery pipe 27 caused by pressure imbalance in the cyclone separator module 2 under accident conditions, a check valve 28 is installed inside the recovery pipe 27 to prevent backflow.

[0097] It is important to note that the elastic sealing ring 29 between the air inlet section and the direct current section of the cylinder 21 effectively isolates the gas leakage path, prevents short-circuit flow, and significantly improves the operating efficiency and stability of the cyclone separation module 2. O-rings are used for sealing at the connection between the recovery pipe 27 and the adjustment chamber 212 to ensure sealing performance.

[0098] Furthermore, the gravity settling module 3 includes: a settling tank, an inlet 31, a drain outlet 32, an inclined plate assembly 33, a liquid-proof plate 34, and a vent outlet 39;

[0099] Among them, inlet 31 is the inlet, which is opened on one side of the top of the settling tank; vent 39 is the outlet, which is opened on the other side of the top of the settling tank; drain 32 is opened at the bottom of the settling tank; anti-liquid plate 34 is installed in the settling tank near the drain 32 and divides the settling tank into upper and lower chambers; inclined plate group 33 is set in the upper chamber of the settling tank.

[0100] In this embodiment, please refer to Figure 7 , Figure 8 As shown, coalbed methane containing both solid and liquid impurities enters the upper cavity of the settling tank through inlet 31. Upon entering the settling tank, the coalbed methane flow rate decreases. Due to their density difference, solid particles and liquid droplets settle naturally under gravity. The inclined plates in the inclined plate assembly 33 divide the upper cavity of the settling tank into multiple narrow channels to ensure that impurities can smoothly slide down the surface of the inclined plates and be collected, thus completing the separation of the coalbed methane. The separated coalbed methane is discharged through vent 39, and the separated impurities are discharged through drain 32.

[0101] It should be noted that the imported No. 31 uses a 90° elbow, which can reduce the impact on the stability of the coalbed methane to be separated in the settling tank.

[0102] It is important to note that a level gauge is installed in the lower cavity of the settling tank to monitor the liquid level in real time. When the liquid level reaches the preset discharge threshold, the discharge system will automatically start and open the discharge port 32 to periodically discharge the liquid and impurities accumulated in the lower cavity of the settling tank, ensuring that they are completely separated from the purified gas.

[0103] Furthermore, the liquid-proof plate 34 includes: plate body 341, float valve 342, lower skirt 343, and locking pin 344;

[0104] Among them, the float valve 342 is cap-shaped, with the bottom of its cap section abutting against the top of the plate 341, the straight section is placed in the mounting hole on the plate 341 and the bottom of the straight section is provided with a lower skirt 343, the cross-sectional diameter of the straight section is smaller than the cross-sectional diameter of the mounting hole, the lower skirt 343 is located at the lower end of the plate 341 and three sets of locking pins 344 are arranged around its circumference.

[0105] The length of each inclined plate in the inclined plate group 33, which is arranged in parallel, increases from the direction of the inlet 31 to the direction of the vent 39.

[0106] In a preferred embodiment, to improve the separation efficiency of the gravity settling module 3, the inclined plate group 33 set inside the settling tank is composed of multiple parallel inclined plates. The inclination angle of each inclined plate is 30°, and the spacing between each inclined plate can be adjusted according to the particle size of the droplets and solid particles to be separated, with an adjustment range of 30mm-100mm. In this invention, each inclined plate has a different length and is arranged in an increasing parallel combination.

[0107] The coalbed methane gas near inlet 31 has a high velocity and carries a large number of large-diameter solid particles. A shorter inclined plate is used here to shorten the settling path of these particles, allowing for rapid separation of coarse solid impurities according to Stokes' law of settling. As the coalbed methane flows towards vent 39, the velocity gradually decreases, but residual micron-sized droplets or colloidal particles still require a longer settling time for efficient separation. Therefore, a gradually lengthening inclined plate design is adopted. This design extends the residence time of the coalbed methane between the inclined plates, giving fine particles more opportunities to collide with and aggregate, thus significantly improving the capture efficiency of fine particles.

[0108] By optimizing the gradual design of the inclined plate length, the gravity settling module 3 can more accurately adapt to the settling characteristics of particles of different sizes, thus achieving efficient separation of impurities in coalbed methane.

[0109] It is important to note that the settling tank is equipped with a liquid-proof plate 34, and the float valve 342 has a hollow structure made of lightweight materials such as aluminum alloy. When there is no liquid or a small amount of liquid on the plate 341, under the action of gravity, the bottom end of the cap section of the float valve 342 directly contacts the upper surface of the plate 341, preventing the liquid in the lower cavity of the settling tank from flowing back into the upper cavity after separation, thus effectively ensuring unidirectional transport. When there is a large amount of liquid on the plate 341, the buoyancy force on the float valve 342 is greater than its own weight. Under the combined action of the two forces, the float valve 342 will rise, and the bottom end of the cap section of the float valve 342 will detach from the contact with the upper surface of the plate 341 (the locking pin 344 acts on the lower surface of the plate 341 to lock the float valve 342 upward). Since the cross-sectional diameter of the straight section of the float valve 342 is smaller than the cross-sectional diameter of the mounting hole on the plate 341, a gap will be formed between the lower and upper chambers of the settling tank. The accumulated liquid on the plate 341 flows through the gap into the lower chamber of the settling tank. As the liquid level on the plate 341 decreases, the gap closes, and the bottom end of the cap section of the float valve 342 resumes direct contact with the upper surface of the plate 341.

[0110] An air distribution anti-impact plate 35 and a guide plate 36 are installed in the upper cavity of the settling tank near the inlet 31. A baffle 37 is installed at the top of the upper cavity of the settling tank near the longest inclined plate in the inclined plate group 33.

[0111] In this embodiment, the gas distribution anti-impact plate 35 can reduce the damage to the settling tank caused by the erosion of coalbed methane, the guide plate 36 can effectively guide the coalbed methane entering the upper cavity of the settling tank, and the baffle 37 can effectively prevent short-circuit flow from occurring in the upper cavity of the settling tank.

[0112] The upper cavity of the settling tank is equipped with a serpentine mist-catching pipe 38 that is connected to the vent 39, and a safety valve is provided on the top of the settling tank.

[0113] In this embodiment, a serpentine mist-catching tube 38 is connected to the vent 39. This means that the coalbed methane that has undergone separation within the upper cavity of the settling tank must flow through the serpentine mist-catching tube 38 to leave the settling tank. The main structure of the serpentine mist-catching tube 38 is a coil. Multiple elliptical or circular holes are formed on the coil, and a filter screen made of hydrophilic material is wrapped around the outside of the coil to capture the small amount of liquid droplets carried in the purified coalbed methane after settling and separation. The serpentine coil shape effectively increases the effective area of ​​the mist-catching process, reduces the droplet penetration problem caused by concentrated flow streams, and improves the mist-catching effect.

[0114] In this embodiment, a safety valve is installed at the top of the settling tank. This safety valve is a diaphragm-type explosion-proof safety valve. Under normal operating pressure, the diaphragm is tightly fitted to the valve seat under the preload of the spring and its own elasticity to prevent gas leakage. When the pressure in the system rises to the set burst value, the diaphragm ruptures rapidly because it cannot withstand the excessive pressure, thereby opening the pressure relief channel, allowing excess gas to be discharged, reducing the pressure in the system, and ensuring safe production.

[0115] Furthermore, the folding plate separation module 4 includes: a separation tank, an air inlet 41, an exhaust outlet 42, a lower outlet 43, and a folding plate assembly 44;

[0116] The separator has an air inlet 41 at one end and an exhaust outlet 42 at the other end. The separator also has a lower outlet 43 at the lower end and a baffle assembly 44 inside.

[0117] In this embodiment, please refer to Figure 9 , Figure 10 As shown, coalbed methane containing impurities enters the separation tank through gas inlet 41 and first undergoes free settling. Under the action of gravity, large-diameter droplets will directly settle to the bottom of the separation tank and then be discharged through the lower outlet 43. Tiny droplets are carried by the coalbed methane and continue to flow. They are then captured by the baffle assembly 44 to form a liquid film, slide to the bottom of the settling tank, and are discharged through the lower outlet 43. After separation, the coalbed methane will flow through the exhaust port 42 and be discharged.

[0118] It is important to note that a wire mesh mist eliminator is installed at the exhaust port 42 to further capture any entrained droplets that have not completely separated within the area of ​​the baffle assembly 44, thereby improving separation efficiency and reducing the impact and burden on the downstream system. Personnel must regularly clean the area of ​​the lower exhaust port 43 to keep the passage unobstructed.

[0119] Furthermore, the folding plate assembly 44 includes: a base plate 441, a first connecting rod 442, a first folding plate 443, a second connecting rod 444, a second folding plate 445, a rack 446, a gear 447, a motor 448, and a slide rail 449.

[0120] Among them, the substrate 441 is configured as two sets, and two sets of connecting rods 442 are fixedly connected between the two sets of substrates 441 and two sets of connecting rods 444 are slidably connected. Multiple sets of folding plates 443 are equidistantly arranged between the two sets of connecting rods 442, and multiple sets of folding plates 445 are equidistantly arranged between the two sets of connecting rods 444. The bending trends of folding plates 443 and folding plates 445 are different.

[0121] Both sets of connecting rods 444 slide through the end of each set of folding plate 443 away from the two sets of connecting rods 442, and the end of each set of folding plate 445 away from the two sets of connecting rods 444 slides to the two sets of connecting rods 442.

[0122] In this embodiment, multiple sets of baffles 443 form baffle group one, and multiple sets of baffles 445 form baffle group two. When coalbed methane containing tiny droplets enters the baffle assembly 44, it passes through the tortuous flow channel between baffle group one and baffle group two, forcing itself to frequently change direction. The tiny droplets carried by the coalbed methane itself break away from the streamline due to inertia and collide with the plate walls of the two baffle groups, accumulating to form a liquid film. Under the action of surface tension and gravity, the film leaves the baffle assembly 44, completing the separation. During this process, the droplets splashed up by reflection will interact again with the plate walls of the subsequent two baffle groups along with the coalbed methane flow, repeating the above separation process to complete the separation.

[0123] A motor 448 is installed on the separation tank and its output shaft is sealed through the separation tank and connected to a gear 447. A rack 446 is set on a connecting rod 444 near the bottom of the base plate 441 through a connecting part. The gear 447 meshes with the rack 446. A slide rail 449 is provided between the two base plates 441. The connecting part is connected to the slide rail 449 through a slide bar sliding clip.

[0124] In a preferred embodiment, the bending trends of the first and second folding plate groups are different, thus forming a gradually narrowing and expanding alternating flow channel between them (e.g., Figure 10 As shown at points A and B in the diagram, the coalbed methane gas flow undergoes alternating acceleration and deceleration processes within this channel, thereby changing the interaction between the droplets and the walls of the two-plate group and improving separation efficiency. Specifically, in the acceleration section, the channel cross-section narrows, the coalbed methane gas flow velocity increases, and the droplets migrate towards the walls of the two-plate group due to enhanced inertial collisions and centrifugal effects; in the deceleration section, the channel cross-section widens, and the velocity gradient change promotes droplet coalescence and sedimentation.

[0125] It is important to note that this periodic velocity field variation significantly improves droplet capture efficiency, especially for dust-laden mists with a wide particle size distribution commonly found in coalbed methane. Due to the special structure of the gradually narrowing and expanding alternating flow channel, the high-speed region of its internal velocity field has a higher velocity than that of a flow channel with a conventional structure, resulting in better capture of tiny droplets.

[0126] The gradually narrowing and expanding alternating flow channel used in this invention increases the number of droplet collisions, creating new capture opportunities at each corner. Simultaneously, the reflux zone generated within the channel prolongs droplet residence time, promoting secondary coalescence. In contrast, ordinary parallel flow channels are prone to small-diameter droplet escape due to insufficient airflow uniformity, resulting in inadequate separation efficiency for small droplets.

[0127] This invention can also adjust the spacing between the two folding plate groups to form gradually narrowing and expanding alternating flow channels of different specifications, thereby performing separation operations under corresponding working conditions. Specifically: starting the motor 448, the output shaft of the motor 448 drives the gear 447 to rotate, which can drive the rack 446 to reciprocate, thereby driving the two sets of connecting rods 444 and multiple sets of folding plates 445 to reciprocate synchronously, thus realizing the adjustment of the spacing between the two folding plate groups.

[0128] Simultaneously, the surface of the two-fold panel assembly needs to be treated to improve its hydrophilicity and droplet capture efficiency. A hydrophilic coating, such as polyvinyl alcohol (PVA), can be used to coat the surface of the two-fold panel assembly. PVA is a polymer material with good hydrophilicity and can be formulated into a coating, which can be applied to the surface of the two-fold panel assembly through processes such as spraying or dipping. The PVA coating can form a hydrophilic film on the surface of the two-fold panel assembly, making it easier for droplets to spread and coalesce on the surface, thereby improving the demisting efficiency. The advantages of hydrophilic coatings are simple operation, low cost, and the ability to adjust the type of coating material as needed to improve droplet capture efficiency.

[0129] An explosion-proof valve is installed on the upper part of the separation tank.

[0130] In this embodiment, the explosion-proof valve is a diaphragm-type explosion-proof safety valve, which works on the same principle as the safety valve installed on the gravity settling module 3, and will not be described again here.

[0131] Furthermore, a method for a skid-mounted multi-effect coupled coalbed methane field separation device includes the following steps:

[0132] S1: Open valve 15, and coalbed methane enters monitoring system 1 through the inlet pipe;

[0133] S2: Monitoring system 1 monitors parameters of coalbed methane and obtains monitoring results;

[0134] S3: Monitoring system 1 adjusts the valve group based on the monitoring results;

[0135] S4: The three components of cyclone separation module 2, gravity settling module 3 and folding plate separation module 4 enter the connection mode corresponding to the monitoring results obtained by monitoring system 1;

[0136] Please see Figure 2 , Figure 3 , Figure 4 As shown. (Solid valves represent open, hollow valves represent closed, and thick solid lines represent open circuits.)

[0137] Specifically, Example 1: Monitoring system 1 shows that the flow rate is extremely high during the initial stage of coal seam mining. At this time, the intelligent control system within monitoring system 1 opens valves 2 (16) to 7 (201), while closing valves 9 (203), 10 (204), 11 (205), and 12 (206). Simultaneously, the cyclone separation module 2, gravity settling module 3, and baffle separation module 4 enter a parallel connection mode. In this mode, the overall coalbed methane processing capacity of this invention is significantly improved, meeting the demand for high flow rates. The coalbed methane to be separated will be evenly distributed into the three processing modules, achieving balanced equipment load through uniform flow distribution, effectively avoiding equipment overload risks, and improving system separation efficiency.

[0138] Example 2: Monitoring system 1 shows a stable but low flow rate with high sand content, requiring fine processing. At this time, the intelligent control system within monitoring system 1 opens valves 16, 201, 203, and 204, while closing all valves except 15 and 202. The cyclone separation module 2, gravity settling module 3, and baffle separation module 4 then enter the first type of series connection mode. In this mode, the coal seam gas to be separated undergoes primary solid phase removal via the cyclone separation module 2, residual particles undergo secondary separation via the gravity settling module 3, and finally, fine gas-solid separation is completed via the baffle separation module 4. This mode avoids wear from abrasive particles on the inclined plate group 33 in the gravity settling module 3 and the two baffle groups in the baffle separation module 4.

[0139] Example 3: Monitoring system 1 shows a stable but low flow rate with high liquid content, requiring careful handling. At this time, the intelligent control system within monitoring system 1 opens valves 18, 206, 205, and 19, while closing all valves except 15 and 202. Simultaneously, the cyclone separation module 2, gravity settling module 3, and baffle separation module 4 enter a second-type series connection mode. In this mode, the coalbed methane to be separated first passes through baffle separation module 4 to remove droplets, and then sequentially passes through gravity settling module 3 and cyclone separation module 2 for subsequent separation operations, avoiding the impact of droplets on subsequent modules.

[0140] Example 4: Monitoring system 1 shows a low flow rate. Based on actual well site requirements, one module can be shut down, with the remaining two modules connected in parallel to maintain system processing capacity and reduce energy consumption. Specific details regarding the opening and closing of the valve groups are not elaborated here.

[0141] Example 5: Monitoring system 1 shows that the flow rate is low, and the main component is a certain type of impurity. Based on the actual well site requirements, two modules can be shut down, and the optimal module can be activated to improve efficiency and reduce energy consumption. The specific opening and closing status of the valve group will not be detailed here.

[0142] S5: Open valve 8202;

[0143] S6: After the coalbed methane is processed by the combination of the cyclone separation module 2, gravity settling module 3 and baffle separation module 4, it is discharged through the discharge pipe to complete the entire separation operation.

[0144] In practice, monitoring system 1 collects key parameters such as the concentration and flow rate of impurities in different phases of the coalbed methane to be separated, and obtains monitoring results. The intelligent control system controls the opening and closing of each valve in the valve group based on the monitoring results, thereby switching the connection mode between the cyclone separation module 2, gravity settling module 3, and baffle separation module 4. The different connection modes among these three modules can determine the most suitable separation method for coalbed methane under different conditions.

[0145] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A skid-mounted multi-effect coupled coalbed methane field separation apparatus, characterized in that: The utility model relates to a kind of integrated monitoring system for sewage treatment, including: Monitoring system (1), cyclone separation module (2), gravity settling module (3), baffle separation module (4), pipeline group and valve group; Wherein, the monitoring system (1), the cyclone separation module (2), the gravity settling module (3) and the baffle separation module (4) are connected through the pipeline group, and the valve group is installed on the pipeline group; The pipeline group includes: inlet pipe, branch pipe one (5), branch pipe two (6), branch pipe three (7), branch pipe four (8), branch pipe five (9), branch pipe six (10), connecting pipe one (11), connecting pipe two (12), connecting pipe three (13), connecting pipe four (14) and discharge pipe; Wherein, the monitoring system (1) is communicated with the inlet pipe; The one end of branch pipe one (5) is communicated with the inlet pipe, and the other end is communicated with the cyclone separation module (2) inlet, the one end of branch pipe two (6) is communicated with the inlet pipe, and the other end is communicated with the gravity settling module (3) inlet, the one end of branch pipe three (7) is communicated with the inlet pipe, and the other end is communicated with the baffle separation module (4) inlet; The one end of branch pipe four (8) is communicated with the cyclone separation module (2) outlet, and the other end is communicated with the discharge pipe, the one end of branch pipe five (9) is communicated with the gravity settling module (3) outlet, and the other end is communicated with the discharge pipe, the one end of branch pipe six (10) is communicated with the baffle separation module (4) outlet, and the other end is communicated with the discharge pipe; The first bifurcation is arranged at the front end of the cyclone separation module (2) inlet, and the second bifurcation is arranged at the rear end of the outlet, the third bifurcation is arranged at the front end of the gravity settling module (3) inlet, and the fourth bifurcation is arranged at the rear end of the outlet, the fifth bifurcation is arranged at the front end of the baffle separation module (4) inlet, and the sixth bifurcation is arranged at the rear end of the outlet; The connecting pipe one (11) is communicated between the second bifurcation and the third bifurcation, the connecting pipe two (12) is communicated between the third bifurcation and the sixth bifurcation, the connecting pipe three (13) is communicated between the fifth bifurcation and the fourth bifurcation, and the connecting pipe four (14) is communicated between the first bifurcation and the fourth bifurcation; The valve group includes: valve one (15), valve two (16), valve three (17), valve four (18), valve five (19), valve six (20), valve seven (201), valve eight (202), valve nine (203), valve ten (204), valve eleven (205) and valve twelve (206); Wherein, the valve one (15) is installed on the inlet pipe; The valve two (16) is installed on the branch pipe one (5), the valve three (17) is installed on the branch pipe two (6), and the valve four (18) is installed on the branch pipe three (7); The valve five (19) is installed on the branch pipe four (8), the valve six (20) is installed on the branch pipe five (9), and the valve seven (201) is installed on the branch pipe six (10); The valve eight (202) is installed on the discharge pipe. The valve nine (203) is installed on the connecting pipe one (11), the valve ten (204) is installed on the connecting pipe three (13), the valve eleven (205) is installed on the connecting pipe four (14), and the valve twelve (206) is installed on the connecting pipe two (12).

2. The skid-mounted multi-effect coupled coalbed methane field separation device according to claim 1, characterized in that: The cyclone separation module (2) comprises a cylinder (21), an air inlet (22), a cover plate (23), an ash discharge pipe (24), an ash collecting hopper (25), an overflow pipe (26), an adjusting seat (210), a cyclone port (211) and an adjusting cavity (212). The cylinder (21) is divided into an air inlet section, a straight flow section, a tapered section and an ash collecting section from top to bottom, and the adjusting seat (210) is installed at the air inlet section position. The lower part of the outer wall of the adjusting seat (210) is attached to the inner wall of the cylinder (21), and the upper part of the outer wall of the adjusting seat (210) and the cylinder (21) form the adjusting cavity (212), and three groups of cyclone ports (211) are arranged on the upper part of the outer wall of the adjusting seat (210). The cylinder (21) is provided with the air inlet (22), which is an inlet and is connected to the branch pipe one (5) at one end and the adjusting cavity (212) at the other end. The top end of the cylinder (21) is provided with the cover plate (23) through bolts, and the top of the adjusting seat (210) is connected to the cover plate (23). The overflow pipe (26) penetrates through the cover plate (23) and extends into the adjusting seat (210), and the other end is outside the cyclone separation module (2) and serves as an outlet. The ash discharge pipe (24) is connected to the bottom end of the tapered section of the cylinder (21) at one end and the ash collecting hopper (25) at the other end.

3. The skid-mounted multi-effect coupled coalbed methane field separation device according to claim 2, characterized in that: The elastic sealing rubber ring (29) is arranged between the air inlet section and the straight flow section of the cylinder (21), the recovery pipe (27) is connected to the upper end of the sidewall of the ash collecting hopper (25), the one end of the recovery pipe (27) is connected to the adjusting cavity (212), and the check valve (28) is arranged in the middle of the recovery pipe (27).

4. The skid-mounted multi-effect coupled coalbed methane field separation device according to claim 1, characterized in that: The gravity settling module (3) comprises a settling tank, an inlet (31), a liquid discharge port (32), a sloping plate group (33), a liquid prevention plate (34) and a gas discharge port (39). The inlet (31) is an inlet and is arranged on one side of the top of the settling tank, the gas discharge port (39) is an outlet and is arranged on the other side of the top of the settling tank, the liquid discharge port (32) is arranged at the bottom of the settling tank, the liquid prevention plate (34) is installed in the settling tank and divides the settling tank into two chambers, and the sloping plate group (33) is arranged in the upper chamber of the settling tank.

5. The skid-mounted multi-effect coupled coalbed methane field separation device according to claim 4, characterized in that: The liquid-proof plate (34) comprises a plate body (341), a float valve (342), a lower skirt (343), and a detent pin (344); The float valve (342) is in a cap shape, the bottom of the cap body is in contact with the top end of the plate body (341), the straight body is arranged in the mounting hole on the plate body (341), and the bottom end of the straight body is provided with the lower skirt (343); the cross-sectional diameter of the straight body is smaller than that of the mounting hole; the lower skirt (343) is located at the lower end of the plate body (341), and three groups of the detent pins (344) are arranged on the circumference of the lower skirt (343); The length of each inclined plate arranged in parallel in the inclined plate group (33) increases from the direction of the inlet (31) to the direction of the air outlet (39); The gas-distributing anti-collision plate (35) and the flow guide plate (36) are arranged in the upper cavity of the settling tank body, close to the position of the inlet (31); the baffle (37) is arranged in the upper cavity of the settling tank body, close to the position of the longest inclined plate in the inclined plate group (33); The serpentine mist-capturing pipe (38) is arranged in the upper cavity of the settling tank body, and is in communication with the air outlet (39); and the safety valve is arranged on the top of the settling tank body.

6. The skid-mounted multi-effect coupled coalbed methane field separation device according to claim 1, characterized in that: The folding plate separation module (4) comprises a separation tank body, an air inlet (41), an air outlet (42), a lower outlet (43), and a folding plate assembly (44); The separation tank body is provided with the air inlet (41) at one end as an inlet, and is provided with the air outlet (42) at the other end as an outlet; the lower end of the separation tank body is provided with the lower outlet (43); and the separation tank body is internally provided with the folding plate assembly (44).

7. The skid-mounted multi-effect coupled coalbed methane field separation device according to claim 6, characterized in that: The folding plate assembly (44) comprises a base plate (441), a connecting rod one (442), a folding plate one (443), a connecting rod two (444), a folding plate two (445), a rack (446), a gear (447), a motor (448), and a sliding rail (449); The base plate (441) is configured in two groups, and the two groups of base plates (441) are fixedly connected with two groups of connecting rod ones (442) and slidably connected with two groups of connecting rod twos (444); a plurality of groups of folding plate ones (443) are equidistantly arranged between the two groups of connecting rod ones (442); a plurality of groups of folding plate twos (445) are equidistantly arranged between the two groups of connecting rod twos (444); the folding plate one (443) and the folding plate two (445) have different bending tendencies; Each group of connecting rod twos (444) slidably penetrates one end of each group of folding plate ones (443) away from the two groups of connecting rod ones (442); and each group of folding plate twos (445) away from the two groups of connecting rod twos (444) is slidably connected to the two groups of connecting rod ones (442). The motor (448) is installed on the separation tank body and its output shaft is sealed through the separation tank body and connected with the gear (447), the rack (446) is arranged on the connecting rod two (444) near the bottom end of the base plate (441) through a connecting part, the gear (447) is engaged with the rack (446), the slide rail (449) is arranged between the two groups of base plates (441), and the connecting part is slidably clamped into the slide rail (449) through a slide bar; An explosion-proof valve is installed on the upper part of the separation tank body.

8. The method of claim 1, wherein: It comprises the following steps: S1: open valve one (15), and the coal bed gas enters into the monitoring system (1) through the inlet pipe; S2: the monitoring system (1) monitors the parameters of the coal bed gas and obtains monitoring results; S3: the monitoring system (1) adjusts the valve group according to the monitoring results; S4: the cyclone separation module (2), the gravity settling module (3) and the baffle separation module (4) enter into the communication mode corresponding to the monitoring results obtained by the monitoring system (1); S5: open valve eight (202); S6: the coal bed gas is discharged through the discharge pipe after being processed by the cooperation between the cyclone separation module (2), the gravity settling module (3) and the baffle separation module (4), and the whole separation operation can be completed.

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