Supergravity skid-mounted movable dust removal and dehydration integrated purification method and system for coal bed gas

Abstract

The invention relates to the field of coal bed gas purification, and discloses a coal bed gas supergravity skid-mounted movable dust removal and dehydration integrated purification method and system.The method comprises the following steps that S1, coal bed gas enters a first supergravity rotating bed to be in gas-liquid contact with a liquid medium, the liquid medium forms micron-sized liquid drops and liquid filaments under the action of centrifugal force, and the micron-sized liquid drops and liquid filaments are separated from the first supergravity rotating bed; capturing solid particle impurities in the coal bed gas; s2, free water in the coal bed gas is separated through a gas-liquid separation device, and the coal bed gas enters a second supergravity rotating bed to be in gas-liquid contact with a chemical adsorbent; and S3, the dehydrated coal bed gas is discharged through a gas outlet, and the liquid medium and the chemical adsorbent are respectively discharged through a liquid outlet and are subjected to follow-up treatment. Through the synergistic effect of the baffling type supergravity rotating bed and the cross-flow type supergravity rotating bed, submicron particles and moisture in the coal bed gas are removed, the baffling type rotating bed forms micron liquid drops and liquid filaments through centrifugal force, and compared with multi-stage separation equipment, the system completes purification in a single process, and the efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of coalbed methane purification, and in particular to a coalbed methane supergravity skid-mounted movable dust removal and dehydration integrated purification method and system. Background Art

[0002] As a clean energy source, coalbed methane (CBM) purification is a crucial step in its development and utilization. Existing technologies typically utilize a combination of cyclone separators, filter separators, and triethylene glycol (TEG) dehydration towers. Cyclone separators remove larger impurities through centrifugal force, filter separators capture fine particles with filter elements, and TEG dehydration towers remove moisture from the gas through chemical adsorption. Under certain conditions, these devices can achieve initial CBM purification, meeting the needs of some industrial applications.

[0003] However, existing technologies have significant shortcomings in removing submicron solid particles and moisture. Cyclone separators have a low capture efficiency for particles smaller than 1 μm, typically only 30% to 50%, making it difficult to meet high purity requirements. Although filter separators can capture some submicron particles, the filter element is prone to clogging and requires frequent replacement, resulting in high maintenance costs. The dehydration efficiency of the triethylene glycol dehydration tower is limited by the gas-liquid contact area, requiring a larger equipment volume and more adsorbent, increasing operating costs. These drawbacks limit the efficiency of coalbed methane purification, making it difficult to efficiently remove submicron particles and moisture in a single system, affecting the overall performance of the purification process. Summary of the Invention

[0004] In response to the shortcomings of the existing technology, the present invention provides a coalbed methane ultra-gravity skid-mounted movable dust removal and dehydration integrated purification method and system to solve the problem that the existing technology is difficult to efficiently remove submicron particles and moisture in a single system.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a coalbed methane supergravity skid-mounted movable dust removal and dehydration integrated purification method, comprising the following steps: S1. Coalbed methane enters the first high-gravity rotating bed and enters gas-liquid contact with the liquid medium. The liquid medium forms micron-sized droplets and liquid filaments under the action of centrifugal force, capturing solid particle impurities in the coalbed methane. The purified coalbed methane enters the gas-liquid separation device; S2. The gas-liquid separation device separates free water from the coalbed methane. The coalbed methane enters the second high-gravity rotating bed and comes into gas-liquid contact with the chemical adsorbent. The chemical adsorbent forms micron-sized droplets and liquid filaments under the action of centrifugal force, which absorbs the water in the coalbed methane. S3. The dehydrated coalbed methane is discharged through the gas outlet, and the liquid medium and chemical adsorbent are discharged through the liquid outlet respectively for subsequent treatment.

[0006] Through the above technical solution, the first high-gravity rotating bed uses a liquid medium to capture solid particles, the second high-gravity rotating bed uses a chemical adsorbent to remove moisture, and high-efficiency purification is achieved by combining gas-liquid separation and subsequent treatment. Compared with traditional technologies, this method enhances the gas-liquid contact efficiency through a high-gravity environment, simplifies the process flow, reduces equipment footprint and operating costs, is suitable for a variety of complex working conditions in coalbed methane well sites, and has higher dehydration efficiency and recycling characteristics.

[0007] Preferably, in step S1, the first high-gravity rotating bed is a baffled high-gravity rotating bed, the liquid medium is water, the coalbed methane enters the baffled channel through the gas inlet A, and the water is pressurized from the storage tank A by the screw booster pump and then sprayed into the baffled rotating bed moving plate through the liquid inlet A. Under the action of centrifugal force, it flows from the center to the surrounding area, forming liquid film, droplets and liquid filaments to capture solid particle impurities.

[0008] Preferably, in step S1, solid particle impurities are captured by the liquid medium by centrifugal force, larger particles are thrown to the wall of the baffled high-gravity rotating bed and discharged through the liquid outlet C with the liquid medium, and smaller particles are adsorbed by droplets and liquid filaments and discharged with the liquid medium.

[0009] Preferably, in step S2, the second high-gravity rotating bed is a cross-flow high-gravity rotating bed, the chemical adsorbent is triethylene glycol, the coalbed methane enters the porous rotor through the gas inlet B, and the triethylene glycol enters the cross-flow rotating bed moving plate through the liquid inlet B after being pressurized by the screw booster pump from the storage tank B, and diffuses to the periphery under the action of centrifugal force to form liquid film, droplets and liquid filaments to adsorb moisture.

[0010] Preferably, in step S3, the triethylene glycol after adsorbing water is discharged through the liquid outlet D and circulated directly to the storage tank B or circulated to the storage tank B after regeneration treatment according to its saturation state.

[0011] Preferably, in step S3, the dehydrated coalbed methane enters the mist replenisher through the gas outlet to prevent chemical adsorbent residue from entering the downstream pipeline.

[0012] Preferably, the coalbed methane super-gravity skid-mounted movable dust removal and dehydration integrated purification system includes: a power device connected to the speed regulating mechanism, the speed regulating mechanism driving the first high gravity rotating bed and the second high gravity rotating bed; The first high-gravity rotating bed is provided with a first gas inlet, a first liquid inlet, a first gas outlet and a first liquid outlet, the first liquid inlet is connected to the first storage tank through a first booster pump, and the first gas outlet is connected to the gas-liquid separation device; The second high-gravity rotating bed is provided with a second gas inlet, a second liquid inlet, a second gas outlet and a second liquid outlet. The second gas inlet is connected to the gas-liquid separation device, the second liquid inlet is connected to the second storage tank through the second booster pump, and the second gas outlet is connected to the mist replenisher.

[0013] Preferably, the power device is a frequency-modulated motor, and the speed regulation mechanism includes a speed converter and a speed regulation unit. The speed converter drives the rotating bed movable plate of the first high-gravity rotating bed and the rotating bed movable plate of the second high-gravity rotating bed through a coupling. The speed regulation unit is a four-stage differential regulation mechanism, which is arranged between the speed converter and the rotating bed movable plate of the first high-gravity rotating bed.

[0014] Preferably, the first supergravity rotating bed is a baffled supergravity rotating bed, including a baffled rotating bed moving plate and a baffled rotating bed static plate, and the second supergravity rotating bed is a cross-flow supergravity rotating bed, including a cross-flow rotating bed moving plate and a cross-flow rotating bed static plate, both of which adopt a horizontal structure and operate by coaxial but unidirectional rotation.

[0015] Preferably, the first storage tank is storage tank A, which is used to store water, and the second storage tank is storage tank B, which is used to store triethylene glycol; the first booster pump and the second booster pump are screw booster pumps, namely the second screw booster pump and the first screw booster pump respectively; the gas-liquid separation device is a gas-liquid separation tank; the system pipeline is flexibly connected by a bellows and is provided with a valve; the entire system is a detachable skid-mounted structure.

[0016] The present invention provides a coalbed methane supergravity skid-mounted movable dust removal and dehydration integrated purification method and system. It has the following beneficial effects: 1. The present invention removes submicron particles and moisture from coalbed methane through the synergistic effect of baffled and cross-flow high-gravity rotating beds. The baffled rotating bed uses centrifugal force to form micron-sized droplets and liquid filaments, capturing 0.1-10μm particles, which is superior to traditional filters. The cross-flow rotating bed uses triethylene glycol to chemically adsorb moisture, and its dehydration efficiency is higher than conventional methods. Compared with multi-stage separation equipment, this system completes purification in a single process, improving efficiency.

[0017] 2. The present invention integrates dust removal and dehydration into a single system. The first high-gravity rotating bed removes particles, the gas-liquid separation device removes free water, and the second high-gravity rotating bed performs deep dehydration, reducing the traditional multi-stage equipment in series. Compared with the combination of cyclone separator and dehydration tower, the process steps are fewer and the operation stability is higher.

[0018] 3. The present invention optimizes energy consumption through efficient gas-liquid contact in a high-gravity rotating bed and frequency-modulated motor speed control. The baffled and cross-flow rotating beds improve mass transfer efficiency and reduce liquid usage. The four-stage differential speed regulation unit adjusts the speed and reduces unnecessary energy consumption, which is superior to traditional high-pressure pump systems.

[0019] 4. The present invention adopts a horizontal high-gravity rotating bed and a skid-mounted structure to reduce the floor space and installation height. The rotating bed rotates coaxially and in opposite directions, and the height is controlled at 1.5-2m, which is lower than traditional vertical equipment. The detachable skid-mounted structure is suitable for well sites with limited space and is superior to large tower equipment.

[0020] 5. The present invention is connected by a skid-mounted structure and a bellows, which is convenient for deployment and maintenance, adaptable to different well sites, does not require frequent replacement of filter elements, has a long maintenance cycle, and is superior to traditional fixed equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the layout of the coalbed methane super-gravity skid-mounted movable dust removal and dehydration integrated purification system of the present invention; Figure 2 It is a schematic structural diagram of the speed converter of the present invention.

[0022] Among them, 1. Frequency modulation motor; 2. Coupling; 3. Speed ​​converter; 4. Speed ​​control unit; 5. Baffled high-gravity rotating bed; 6. Baffled rotating bed moving plate; 7. Baffled rotating bed static plate; 8. Storage tank A; 9. Gas-liquid separation tank; 10. Cross-flow high-gravity rotating bed; 11. Cross-flow rotating bed moving plate; 12. Cross-flow rotating bed static plate; 13. First screw booster pump; 14. Second screw booster pump; 15. Valve; 16. Storage tank B. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] Please see the attached Figure 1 -Attached Figure 2 The embodiment of the present invention provides a coalbed methane super-gravity skid-mounted movable dust removal and dehydration integrated purification method, comprising the following steps: S1. Coalbed methane enters the first high-gravity rotating bed and enters gas-liquid contact with the liquid medium. The liquid medium forms micron-sized droplets and liquid filaments under the action of centrifugal force, capturing solid particle impurities in the coalbed methane. The purified coalbed methane enters the gas-liquid separation device; S2. The gas-liquid separation device separates free water from the coalbed methane. The coalbed methane enters the second high-gravity rotating bed and comes into gas-liquid contact with the chemical adsorbent. The chemical adsorbent forms micron-sized droplets and liquid filaments under the action of centrifugal force, which absorbs the water in the coalbed methane. S3. The dehydrated coalbed methane is discharged through the gas outlet, and the liquid medium and chemical adsorbent are discharged through the liquid outlet respectively for subsequent treatment.

[0025] Specifically, in step S1, the coalbed methane is in efficient gas-liquid contact with the liquid medium in the first supergravity rotating bed. The liquid medium is torn into micron-sized droplets and liquid filaments under the action of the centrifugal force of high-speed rotation, forming a huge phase interface, which significantly enhances the capture efficiency of solid particles. Compared with traditional filter separators, it has a stronger ability to capture submicron-sized particles; in step S2, after free water is removed by the gas-liquid separation device, the coalbed methane enters the second supergravity rotating bed, and the chemical adsorbent forms a liquid film in a similar supergravity environment, chemically adsorbing with water. The dehydration efficiency is higher than that of the traditional triethylene glycol dehydration method, while reducing the liquid consumption and reducing the risk of secondary pollution; step S3 ensures the effective separation of the purified coalbed methane and liquid medium, and the subsequent treatment of the liquid medium and chemical adsorbent can be recycled to reduce operating costs; this method simplifies the traditional multi-stage purification process through integrated design, and the equipment occupies a smaller area, which is suitable for a variety of complex working conditions in coalbed methane well sites.

[0026] In step S1, the first high-gravity rotating bed is a baffled high-gravity rotating bed 5, the liquid medium is water, the coalbed methane enters the baffled channel through the gas inlet A, and the water is pressurized from the storage tank A8 by the screw booster pump and then injected into the baffled rotating bed moving plate 6 through the liquid inlet A. Under the action of centrifugal force, it flows from the center to the surrounding area, forming liquid film, droplets and liquid filaments to capture solid particle impurities.

[0027] Specifically, the baffled supergravity rotating bed 5 adopts a specific baffled channel structure. After entering from the edge of the rotor, the coalbed methane flows along a zigzag path, extending the gas-liquid contact time and enhancing the capture effect of solid particles. The water stored in the storage tank A8 is injected into the middle of the baffled rotating bed moving disk 6 at a pressure of 0.5-1.5MPa by the second screw booster pump 14. The moving disk speed ranges from 500-1500rpm, and the centrifugal force can reach hundreds of times the acceleration of gravity. The water diffuses from the center to the surrounding area in the moving disk, forming a liquid film with a thickness of 1-10μm, as well as droplets and liquid filaments with a diameter of 0.1-5μm. Compared with traditional cyclone separators, it has a higher removal efficiency for submicron particles, a lower pressure drop, and reduced energy consumption.

[0028] In step S1, solid particle impurities are captured by the liquid medium by centrifugal force, larger particles are thrown to the wall of the baffled high gravity rotating bed 5 and discharged through the liquid outlet C along with the liquid medium, and smaller particles are adsorbed by liquid droplets and liquid filaments and discharged along with the liquid medium.

[0029] Specifically, within the baffled high-gravity rotating bed 5, solid particulate impurities (such as coal dust and silt) are separated by centrifugal force due to density differences. Larger particles (greater than 10 μm) deviate from the gas streamlines due to their higher kinetic energy and are flung toward the vessel wall. They are then discharged in a continuous stream through liquid outlet C along with the liquid medium. Smaller particles (0.1-10 μm) are adsorbed by the high surface area of ​​the droplets and liquid filaments and discharged as a liquid along with the liquid medium. The capture process does not require frequent filter element replacement, resulting in longer maintenance cycles and lower operational safety risks compared to traditional filter separators. The discharged liquid medium can be recycled through subsequent treatment, further reducing water consumption.

[0030] In step S2, the second high-gravity rotating bed is a cross-flow high-gravity rotating bed 10, and the chemical adsorbent is triethylene glycol. Coalbed methane enters the porous rotor through the gas inlet B. Triethylene glycol is pressurized from the storage tank B16 by the screw booster pump and enters the cross-flow rotating bed moving plate 11 through the liquid inlet B. Under the action of centrifugal force, it diffuses to the surrounding area to form liquid film, droplets and liquid filaments to adsorb moisture.

[0031] Specifically, the cross-flow high-gravity rotating bed 10 utilizes a porous rotor structure. Coalbed methane enters from the rotor edge and flows toward the center, increasing the gas-liquid contact area and improving moisture adsorption efficiency. Triethylene glycol (TEG) is injected from storage tank B16 at a pressure of 0.3-1.0 MPa via a first screw booster pump 13 into the center of the cross-flow rotating bed's rotating disc 11. The disc rotates at a speed of 600-1800 rpm, generating a centrifugal force of 200-1000 times the acceleration of gravity. TEG forms a liquid film with a thickness of 0.5-5 μm, as well as droplets and filaments with a diameter of 0.05-3 μm, within the porous filler (porosity 80%-95%). These form chemical adsorption with moisture from the coalbed methane. Compared to traditional TEG dehydration towers, the equipment is smaller, uses less liquid, and consumes less energy.

[0032] In step S3, the triethylene glycol after adsorbing water is discharged through the liquid outlet D and circulated to the storage tank B16 directly or after regeneration treatment according to its saturation state.

[0033] Specifically, the triethylene glycol after adsorption of water is discharged in liquid form through the liquid outlet D, and the discharge flow rate is controlled at 0.1-1.0m 3 The treatment method is determined by the water saturation of the TEG in the system (typically a threshold of 20% to 50%). If the saturation is below the threshold, the TEG is directly circulated through a pipeline to storage tank B16, achieving a high recycling rate. If the saturation is above the threshold, the TEG enters a regeneration unit, where it is heated and evaporated (at a temperature of 120-150°C) to remove the water before returning to storage tank B16, achieving high regeneration efficiency. This treatment method reduces TEG consumption, offers lower operating costs than traditional dehydration processes, and avoids the complex operation of frequent adsorbent replacement.

[0034] In step S3, the dehydrated coalbed methane enters the mist replenisher through the gas outlet to prevent chemical adsorbent residue from entering the downstream pipeline.

[0035] Specifically, the dehydrated coalbed methane enters the mist replenisher through the gas outlet D at a pressure of 1.0-5.0 MPa. The mist replenisher adopts a multi-layer wire mesh structure (wire mesh aperture 0.1-0.5 mm) to effectively capture residual triethylene glycol droplets, prevent triethylene glycol from entering the downstream coalbed methane or natural gas pipeline, avoid pipeline corrosion and equipment damage, and the pressure drop of the mist replenisher is controlled at 0.01-0.05 MPa, which is much lower than that of traditional filtering devices, ensuring stable airflow delivery. Compared with the existing technology, this embodiment significantly reduces the maintenance frequency of the downstream pipeline and extends the pipeline life.

[0036] Please see the attached Figure 1 , coalbed methane super gravity skid-mounted movable dust removal and dehydration integrated purification system, including: a power device connected to the speed regulating mechanism, the speed regulating mechanism driving the first high gravity rotating bed and the second high gravity rotating bed; The first high-gravity rotating bed is provided with a first gas inlet, a first liquid inlet, a first gas outlet and a first liquid outlet, the first liquid inlet is connected to the first storage tank through a first booster pump, and the first gas outlet is connected to the gas-liquid separation device; The second high-gravity rotating bed is provided with a second gas inlet, a second liquid inlet, a second gas outlet and a second liquid outlet. The second gas inlet is connected to the gas-liquid separation device, the second liquid inlet is connected to the second storage tank through the second booster pump, and the second gas outlet is connected to the mist replenisher.

[0037] Specifically, this system achieves efficient coordinated operation of the first and second high-gravity rotating beds through a power device and a speed adjustment mechanism. The overall system adopts a detachable skid-mounted structure, with a lower installation height and a footprint much smaller than traditional purification equipment. It is suitable for coalbed methane well sites with various terrains; the first high-gravity rotating bed introduces liquid medium from the first storage tank through a first booster pump to complete solid particle removal; the second high-gravity rotating bed introduces chemical adsorbent from the second storage tank through a second booster pump to complete moisture adsorption; the gas-liquid separation device connects the two rotating beds to ensure efficient separation of free water, and the mist replenisher further ensures the purity of the output gas; compared with traditional multi-stage purification equipment, this system has a shorter process flow, lower total investment cost, and higher operational stability.

[0038] The power device is a frequency-modulated motor 1, and the speed regulation mechanism includes a speed converter 3 and a speed regulation unit 4. The speed converter 3 drives the rotating bed movable plate of the first high-gravity rotating bed and the rotating bed movable plate of the second high-gravity rotating bed through a coupling 2. The speed regulation unit 4 is a four-stage differential regulation mechanism, which is arranged between the speed converter 3 and the rotating bed movable plate of the first high-gravity rotating bed.

[0039] Specifically, the frequency-modulated motor 1 provides a power output of 0.5-50kW, and the frequency adjustment range is 20-60Hz, ensuring precise speed control of the rotating bed moving plate; the speed converter 3 realizes the coaxial and directional rotation of the first and second high-gravity rotating beds through the coupling 2, reducing the total torque of the system and improving mechanical efficiency; the four-stage differential speed regulation unit 4 provides four-speed speed adjustment (500-1500rpm, stepping 250rpm), optimizing the capture efficiency for different particle sizes, especially for the removal of submicron particles; compared with the traditional single-speed drive system, this embodiment has a shorter startup time, stronger adaptability of operating parameters, and is convenient for automated control.

[0040] The first supergravity rotating bed is a baffled supergravity rotating bed 5, including a baffled rotating bed moving plate 6 and a baffled rotating bed static plate 7. The second supergravity rotating bed is a cross-flow supergravity rotating bed 10, including a cross-flow rotating bed moving plate 11 and a cross-flow rotating bed static plate 12. Both adopt a horizontal structure and operate by coaxial but unidirectional rotation.

[0041] Specifically, the folded flow high gravity rotating bed 5 and the cross-flow high gravity rotating bed 10 respectively achieve efficient gas-liquid contact through the folded flow rotating bed moving plate 6 and the cross-flow rotating bed moving plate 11, and the static plates 7 and 12 ensure stable airflow; the folded flow structure of the folded flow rotating bed prolongs the contact time and is suitable for capturing solid particles; the porous filler (pore size 0.1-1mm) of the cross-flow rotating bed increases the contact area and is suitable for moisture adsorption; the two are arranged horizontally, and the installation height is controlled at 1.5-2m, which is lower than traditional vertical equipment and is easy to maintain; the coaxial and unidirectional rotation design makes the system vibrate less and has a longer operating life; this embodiment achieves a smaller equipment size through structural optimization to adapt to high gas volume scenarios.

[0042] The first storage tank is storage tank A8, which is used to store water, and the second storage tank is storage tank B16, which is used to store triethylene glycol; the first booster pump and the second booster pump are screw booster pumps, namely the second screw booster pump 14 and the first screw booster pump 13 respectively; the gas-liquid separation device is a gas-liquid separation tank 9; the system pipeline is flexibly connected by a bellows and is provided with a valve 15; the entire system is a detachable skid-mounted structure.

[0043] Specifically, tank A8 and tank B16 store water and triethylene glycol respectively, with a capacity of 0.5-2m 3 , made of corrosion-resistant stainless steel to ensure long-term stable operation. The second screw booster pump 14 and the first screw booster pump 13 adopt a twin-screw design, which is wear-resistant and suitable for conveying liquids containing coal dust or proppant. The pressure output is stable at 0.3-1.5MPa, reducing the liquid regeneration load. The gas-liquid separation tank 9 adopts the cyclone separation principle and has a processing capacity of 500-5000m 3 / h. Flexible bellows connections and 15 valves ensure pipeline sealing and operational flexibility. The detachable skid-mounted structure enables rapid installation and movement to adapt to the needs of different well sites, and offers higher deployment efficiency than traditional fixed equipment.

[0044] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A coalbed methane super-gravity skid-mounted movable dust removal and dehydration integrated purification method, characterized in that: The following steps are involved: S1. Coalbed methane enters the first high-gravity rotating bed and enters gas-liquid contact with the liquid medium. The liquid medium forms micron-sized droplets and liquid filaments under the action of centrifugal force, capturing solid particle impurities in the coalbed methane. The purified coalbed methane enters the gas-liquid separation device; S2. The gas-liquid separation device separates free water from the coalbed methane. The coalbed methane enters the second high-gravity rotating bed and comes into gas-liquid contact with the chemical adsorbent. The chemical adsorbent forms micron-sized droplets and liquid filaments under the action of centrifugal force, which absorbs the water in the coalbed methane. S3. The dehydrated coalbed methane is discharged through the gas outlet, and the liquid medium and chemical adsorbent are discharged through the liquid outlet respectively for subsequent treatment.

2. The coalbed methane supergravity skid-mounted movable integrated dust removal and dehydration purification method according to claim 1 is characterized in that: In step S1, the first high-gravity rotating bed is a baffled high-gravity rotating bed (5), the liquid medium is water, the coalbed methane enters the baffled channel through the gas inlet A, the water is pressurized from the storage tank A (8) by the screw booster pump and then injected into the baffled rotating bed moving plate (6) through the liquid inlet A, and flows from the center to the surroundings under the action of centrifugal force, forming liquid film, liquid droplets and liquid filaments to capture solid particle impurities.

3. The coalbed methane supergravity skid-mounted movable integrated dust removal and dehydration purification method according to claim 2 is characterized in that: In the step S1, solid particle impurities are captured by the liquid medium by centrifugal force, larger particles are thrown toward the wall of the baffled high gravity rotating bed (5) and discharged through the liquid outlet C along with the liquid medium, and smaller particles are adsorbed by the liquid droplets and liquid filaments and discharged along with the liquid medium.

4. The coalbed methane supergravity skid-mounted movable integrated dust removal and dehydration purification method according to claim 1 is characterized in that: In step S2, the second high-gravity rotating bed is a cross-flow high-gravity rotating bed (10), the chemical adsorbent is triethylene glycol, the coalbed methane enters the porous rotor through the gas inlet B, the triethylene glycol is pressurized from the storage tank B (16) by the screw booster pump and enters the cross-flow rotating bed moving plate (11) through the liquid inlet B, and diffuses to the periphery under the action of centrifugal force to form liquid film, liquid droplets and liquid filaments to adsorb moisture.

5. The coalbed methane supergravity skid-mounted movable integrated dust removal and dehydration purification method according to claim 4 is characterized in that: In step S3, the triethylene glycol after adsorbing water is discharged through the liquid outlet D and is directly circulated to the storage tank B (16) or circulated to the storage tank B (16) after regeneration treatment according to its saturation state.

6. The coalbed methane supergravity skid-mounted movable integrated dust removal and dehydration purification method according to claim 1 is characterized in that: In step S3, the dehydrated coalbed methane enters the mist replenisher through the gas outlet to prevent chemical adsorbent residue from entering the downstream pipeline.

7. Coalbed methane super gravity skid-mounted movable dust removal and dehydration integrated purification system, characterized by: The coalbed methane supergravity skid-mounted movable integrated dust removal and dehydration purification method according to any one of claims 1 to 6 comprises: a power device connected to the speed regulating mechanism, the speed regulating mechanism driving the first high-gravity rotating bed and the second high-gravity rotating bed; The first high-gravity rotating bed is provided with a first gas inlet, a first liquid inlet, a first gas outlet and a first liquid outlet, the first liquid inlet is connected to the first storage tank through a first booster pump, and the first gas outlet is connected to the gas-liquid separation device; The second high-gravity rotating bed is provided with a second gas inlet, a second liquid inlet, a second gas outlet and a second liquid outlet. The second gas inlet is connected to the gas-liquid separation device, the second liquid inlet is connected to the second storage tank through the second booster pump, and the second gas outlet is connected to the mist replenisher.

8. The coalbed methane super-gravity skid-mounted movable integrated dust removal and dehydration purification system according to claim 7 is characterized in that: The power device is a frequency-modulated motor (1); the speed regulating mechanism comprises a speed converter (3) and a speed regulating unit (4); the speed converter (3) drives the rotating bed moving disk of the first high-gravity rotating bed and the rotating bed moving disk of the second high-gravity rotating bed through a coupling (2); the speed regulating unit (4) is a four-stage differential regulating mechanism, which is arranged between the speed converter (3) and the rotating bed moving disk of the first high-gravity rotating bed.

9. The coalbed methane super-gravity skid-mounted movable integrated dust removal and dehydration purification system according to claim 8 is characterized in that: The first supergravity rotating bed is a baffled supergravity rotating bed (5), comprising a baffled rotating bed moving plate (6) and a baffled rotating bed static plate (7); the second supergravity rotating bed is a cross-flow supergravity rotating bed (10), comprising a cross-flow rotating bed moving plate (11) and a cross-flow rotating bed static plate (12); both adopt a horizontal structure and operate by coaxial but opposite rotation.

10. The coalbed methane super-gravity skid-mounted movable integrated dust removal and dehydration purification system according to claim 7, characterized in that: The first storage tank is storage tank A (8) for storing water, and the second storage tank is storage tank B (16) for storing triethylene glycol; the first booster pump and the second booster pump are screw booster pumps, namely the second screw booster pump (14) and the first screw booster pump (13); the gas-liquid separation device is a gas-liquid separation tank (9); the system pipeline is flexibly connected by a bellows and is provided with a valve (15); the entire system is a detachable skid-mounted structure.

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