Wet-type supergravity separation and purification device for coal bed gas and purification method thereof

Abstract

The invention discloses a coal bed gas wet-type supergravity separation and purification device and a purification method thereof, and particularly relates to the technical field of coal bed gas separation and purification. The coal bed gas wet-type supergravity separation and purification device comprises a base, a flow guide purification treatment assembly is arranged on the base and comprises a treatment box arranged at the top of the base, and a limiting barrel is arranged in the treatment box; and a packed bed is arranged in the limiting cylinder. Gas flows along the axial direction of the packed bed, compared with a baffling type rotating bed, centrifugal resistance does not need to be overcome, the cross section of a gas flow channel is uniform, the gas speed is constant, the gas phase resistance is small, the packed bed is suitable for large-flow gas-liquid mass transfer, the rotating speed of the packed bed is adjusted, and the pressure drop of the packed bed is increased along with the increase of the rotating speed; components flowing out of the bottom of the packed bed are conveyed into the settling tank through a guide pipe, solid-liquid separation is achieved, the contact area with dust-containing gas is increased, and the gas-liquid two phases complete the dust removal, water removal and purification effects of the absorption liquid on coal bed gas under the conditions of high turbulence, large phase interface and high-speed updating of the phase interface.

Description

Technical Field

[0001] The present invention relates to the technical field of coal bed gas separation and purification, and more specifically, to a coal bed gas wet super gravity separation and purification device and a purification method thereof. Background Art

[0002] Coalbed methane, commonly known as "gas", is an unconventional natural gas with the characteristics of high calorific value, low emissions and low pollution. It can effectively make up for the current shortage of natural gas supply in my country, optimize the energy structure and reduce greenhouse gas emissions.

[0003] Due to its special mining process, affected by complex geological conditions and mining methods, coalbed methane extracted from gas wells often contains solid impurities such as coal powder, mud and sand, as well as liquid impurities such as free water and formation water. Acidic gases such as H2S and CO2 in coalbed methane dissolve in water and undergo chemical and electrochemical corrosion with pipelines, causing corrosion damage to long-distance pipelines and compressors, valves and instruments in the transportation system, posing serious safety hazards to natural gas transportation; and solid impurities, driven by high-speed airflow, impact pipeline elbows, compressor blades, valves, etc., resulting in erosion and wear damage, greatly reducing the service life of various components of the transportation system, and causing huge economic losses. In order to ensure the stable operation of the gathering and transportation system and realize the safe and efficient transportation of coalbed methane, effective filtering and separation equipment must be installed to intercept and capture impurities.

[0004] At present, coalbed methane gathering and transportation adopts the ground process technology of "low-pressure gas gathering, multi-field well series connection and valve group series connection, and pressurization in the existing gas gathering station". The dust is removed from the whole process from single well production to pressurized external transmission by gradually improving the filtration accuracy. However, the whole purification process includes multiple purification processes, from single well purification, gas gathering station purification, booster station purification, to central station purification and first station purification. The process pipeline is complex, the equipment is huge, the project cost is high, and the purification equipment cannot be reused. At the same time, under the actual working conditions of coalbed gas, since the same gas well often has solid and liquid impurities coexisting, and the gas sources of long-distance pipelines are diverse, solid and liquid impurities between different gas wells will also mix. Summary of the invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a coalbed methane wet ultra-gravity separation and purification device and a purification method thereof, aiming to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: A coalbed methane wet ultra-gravity separation and purification device, comprising a base, on which a diversion purification treatment component is arranged; The diversion purification treatment component comprises a treatment box arranged on the top of the base, a limiting cylinder is arranged in the treatment box, a packing bed is arranged in the limiting cylinder, a slag receiving cylinder is arranged at the bottom of the treatment box, a driving motor is arranged at the bottom of the slag receiving cylinder, an output end of the driving motor passes through the slag receiving cylinder and the treatment box and extends to the packing bed, and a valve is arranged at the bottom of the limiting cylinder; It can be seen that in the above technical solution, when the untreated coalbed methane containing solid particles such as coal dust and moisture is treated, it enters the treatment box and separator from the gas inlet, passes through the packed bed in the limiting cylinder, and makes the gas flow along the axial direction of the packed bed. Compared with the baffled rotating bed, there is no need to overcome the centrifugal resistance, the gas flow channel cross-section is uniform, the gas velocity is constant, the gas phase resistance is small, and it is suitable for large-flow gas-liquid mass transfer. The packed bed is driven to rotate at high speed by the driving motor. By adjusting the speed of the packed bed, the pressure drop of the packed bed increases with the increase of the speed. At the same time, when the device is in use, the valve can be opened to allow the packed bed to fall into the slag receiving cylinder, which is convenient for replacing the packed bed. A separator is provided on the top of the treatment box, a disperser is provided on the top of the inner cavity of the separator, a mist catcher is provided on the bottom of the disperser, a gathering cover is provided on the outer side of the mist catcher, limit plates are provided on both sides of the disperser, a hanging ring is provided on the top of the disperser, the hanging ring is suspended on the top of the inner cavity of the separator, a first hose is provided on one side of the surface of the separator, one end of the first hose extends to the collector, a second hose is provided on one end of the disperser, the second hose penetrates the separator and extends to one side of the surface of the separator, a tee is provided on the bottom of the tee, a pump is provided at the bottom of the pump, and a regeneration circulator is provided at the bottom of the pump; It can be seen that in the above technical solution, the outflow component at the bottom of the packing bed is transported to the settling tank through the conduit to achieve solid-liquid separation, obtain triethylene glycol rich liquid, and then enter the regeneration circulator; A collector is provided on one side of the surface of the separator, a drainage tank is provided at the bottom of the collector, and the drainage tank is installed on a base, a sedimentation tank is provided on one side of the treatment box, and the sedimentation tank is installed on a base, a gas inlet is provided on one side of the surface of the treatment box, a third hose liquid discharge port is provided on one side of the gas inlet, and the third hose liquid discharge port is connected to the sedimentation tank through a conduit, a fourth hose is provided on one side of the sedimentation tank and the drainage tank, and a fifth hose is provided on one side of the surface of the collector, and the fifth hose extends to a tee; It can be seen that in the above technical solution, the outflow component at the top of the separator is the coal-bed methane after water and dust removal. The triethylene glycol is removed by the mist collector to obtain dry and clean coal-bed methane, which is transported from the first hose to the tee through the fifth hose for regeneration and recycling. The coal-bed methane containing solid particles and water in the coal powder layer after being collected and transported from the gas well enters the processing box. After the dust-containing gas enters the packed bed, it is affected by centrifugal force. Due to the different densities of gas and dust particles, larger dust particles have greater kinetic energy to break away from the gas running trajectory, are thrown to the limit cylinder and discharged with the water flow; A purification method, using the above-mentioned coalbed methane wet supergravity separation and purification device, specifically comprises the following steps: Step 1: The staff installs the device at the designated location. When treating the untreated coalbed methane containing solid particles such as coal dust and moisture, the gas enters the treatment box and separator from the gas inlet, passes through the packing bed in the limit cylinder, and flows along the axial direction of the packing bed. Compared with the baffled rotating bed, there is no need to overcome the centrifugal resistance, the gas flow channel cross-section is uniform, the gas velocity is constant, the gas phase resistance is small, and it is suitable for large-flow gas-liquid mass transfer; Step 2: The packing bed is driven by a driving motor to rotate at high speed. By adjusting the speed of the packing bed, the pressure drop of the packing bed increases with the increase of the speed. At the same time, when the device is in use, the valve can be opened to allow the packing bed to fall into the slag receiving tube, which is convenient for replacing the packing bed. Step 3, the outflow component at the bottom of the packing bed is transported to the settling tank through the conduit to achieve solid-liquid separation, and obtain triethylene glycol rich liquid, which then enters the regeneration circulator; Step 4: The outflow component from the top of the separator is the coal-bed methane after water and dust removal, which is removed by the mist collector to remove triethylene glycol, and the dry and clean coal-bed methane is transported from the first hose to the tee through the fifth hose for regeneration and recycling; Step 5: After the coal-bed gas containing solid particles and water in the coal powder layer is collected and transported from the gas well, it enters the processing box. After the dust-containing gas enters the packing bed, it is affected by the centrifugal force. Due to the different densities of gas and dust particles, the larger dust particles have greater kinetic energy and break away from the gas trajectory. They are thrown to the limit cylinder and discharged with the water flow. Step six, the triethylene glycol absorption liquid is transported to the separator through the pump and the second hose, and is dispersed at the inner edge of the packing through the disperser. Under the action of supergravity, the triethylene glycol liquid is crushed into droplets, liquid filaments and liquid films attached to the surface of the packing bed in the packing bed. On the one hand, the contact area with the dust-containing gas is increased, and collides with the uncaptured dust particles in the gas, and the dust particles are captured by inertial collision, interception and the Brownian diffusion movement of the dust particles themselves. On the other hand, the triethylene glycol absorption liquid completes the water absorption reaction during the countercurrent contact with the coalbed methane gas in the packing bed, and then flows into the settling tank in a concentrated manner. The gas-liquid two phases complete the dust removal and water removal purification effects of the absorption liquid on the coalbed methane under the conditions of high turbulence, large phase interface and high-speed renewal of the phase interface.

[0007] Technical effects and advantages of the present invention: 1. When the coalbed methane to be treated contains solid particles such as coal dust and moisture, the gas enters the treatment box and the separator from the gas inlet, passes through the packing bed in the limiting cylinder, and flows along the axial direction of the packing bed. Compared with the baffled rotating bed, there is no need to overcome the centrifugal resistance, the gas flow channel cross-section is uniform, the gas velocity is constant, the gas phase resistance is small, and it is suitable for large-flow gas-liquid mass transfer; 2. The packing bed of the present invention is driven to rotate at high speed by a driving motor. By adjusting the speed of the packing bed, the pressure drop of the packing bed increases with the increase of the speed. At the same time, when the device is in use, the packing bed can be dropped into the slag receiving barrel by opening the valve, which is convenient for replacing the packing bed. The outflowing components at the bottom of the packing bed are transported to the settling tank through the conduit to achieve solid-liquid separation, obtain triethylene glycol rich liquid, and then enter the regeneration circulator; 3. The outflow component from the top of the separator of the present invention is the coal-bed methane after water and dust removal. The triethylene glycol is removed by the mist collector to obtain dry and clean coal-bed methane, which is transported from the first hose to the tee through the fifth hose for regeneration and recycling. The coal-bed methane containing solid particles and water in the coal powder layer after being collected and transported from the gas well enters the processing box. After the dust-containing gas enters the packing bed, it is affected by centrifugal force. Due to the different densities of gas and dust particles, larger dust particles have greater kinetic energy to break away from the gas running track, are thrown to the limit cylinder and discharged with the water flow; 4. The absorption liquid of the present invention is transported to the separator through a pump and a second hose, and is dispersed at the inner edge of the packing through a disperser. Under the action of supergravity, the triethylene glycol liquid is crushed into droplets, liquid filaments and liquid films attached to the surface of the packing bed in the packing bed. On the one hand, the contact area with the dust-containing gas is increased, and collides with the uncaptured dust particles in the gas, and the dust particles are captured by inertial collision, interception and the Brownian diffusion movement of the dust particles themselves. On the other hand, the triethylene glycol absorption liquid completes the water absorption reaction during the countercurrent contact with the coalbed methane gas in the packing bed, and then flows into the settling tank in a concentrated manner. The gas-liquid two phases complete the dust removal and water removal purification of the coalbed methane by the absorption liquid under the conditions of high turbulence, large phase interface and high-speed renewal of the phase interface; To sum up, the overall design is simple and the structure is reasonable. Through the corresponding coordination of various structures, the gas flows along the axial direction of the packed bed. Compared with the baffled rotating bed, there is no need to overcome centrifugal resistance. The cross-section of the gas flow channel is uniform, the gas velocity is constant, the gas phase resistance is small, and it is suitable for large-flow gas-liquid mass transfer. By adjusting the rotation speed of the packed bed, the pressure drop of the packed bed increases with the increase of the rotation speed, and the outflow component at the bottom of the packed bed is transported to the sedimentation tank through the conduit to achieve solid-liquid separation, and triethylene glycol rich liquid is obtained, and then enters the regeneration circulator. The outflow component at the top of the separator is the coalbed methane after dewatering and dust removal. The triethylene glycol is removed through the mist collector to obtain dry and clean coalbed methane, which is transported from the first hose through the fifth hose to the tee for regeneration and recycling, thereby increasing the contact area with the dust-containing gas. The gas-liquid two phases complete the dust removal and water removal purification of the coalbed methane by the absorption liquid under the conditions of high turbulence, large phase interface and high-speed renewal of the phase interface. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the technical solutions in the present disclosure, the following briefly introduces the drawings required to be used in some embodiments of the present disclosure. Obviously, the drawings described below are only drawings of some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can also be obtained based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams, and are not limitations on the actual size of the product involved in the embodiments of the present disclosure, the actual process of the method, the actual timing of the signal, etc.

[0009] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0010] Figure 2 It is a side view of the overall structure of the present invention.

[0011] Figure 3 It is a cross-sectional view of the overall structure of the present invention.

[0012] Figure 4 For the present invention Figure 2 Side view of the right structure.

[0013] Figure 5 It is a stereoscopic diagram of the sewage discharge tank, slag receiving tube, limiting tube, packing bed and sedimentation tank of the present invention.

[0014] Figure 6 It is a three-dimensional diagram of the disperser, mist catcher and gathering hood of the present invention.

[0015] Figure 7 It is a stereoscopic diagram of the processing box, separator, second hose, tee and regeneration circulator of the present invention.

[0016] The reference numerals are: 1, base; 101, processing box; 102, limiting cylinder; 103, packing bed; 104, slag receiving cylinder; 105, driving motor; 106, valve; 2. Separator; 201. Disperser; 202. Stop plate; 203. Mist collector; 204. Gathering cover; 205. Hanging ring; 206. First hose; 207. Second hose; 208. Tee; 209. Pump; 210. Regeneration circulator; 3. Collector; 301. Drainage tank; 302. Settling tank; 303. Gas inlet; 304. Liquid discharge port of the third hose; 305. Fourth hose; 306. Fifth hose. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] The terms "first", "second", "third" in the embodiments of the present application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second", "third" can expressly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0019] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0020] As attached Figure 1-7 The coalbed methane wet super gravity separation and purification device shown in the figure has a flow-guiding purification treatment component arranged on the base 1, and the gas flows along the axial direction of the packed bed 103. Compared with the baffled rotating bed, there is no need to overcome the centrifugal resistance, the gas flow channel cross-section is uniform, the gas velocity is constant, the gas phase resistance is small, and it is suitable for large-flow gas-liquid mass transfer. By adjusting the rotation speed of the packed bed 103, the pressure drop of the packed bed 103 increases with the increase of the rotation speed, and the outflow component at the bottom of the packed bed 103 is transported to the settling tank 302 through the conduit to achieve solid-liquid separation, and obtain To triethylene glycol rich liquid, and then enter the regeneration circulator 210, the outflow component at the top of the separator 2 is the coal-bed methane after water and dust removal, and the triethylene glycol is removed by the mist collector 203 to obtain dry and clean coal-bed methane, which is transported from the first hose 206 to the tee 208 through the fifth hose 306 for regeneration and recycling, thereby increasing the contact area with the dust-containing gas. The gas-liquid two phases complete the dust removal and water removal purification of the coal-bed methane by the absorption liquid under the conditions of high turbulence, large phase interface and high-speed phase interface renewal, and the specific structural arrangement of the components is as follows; The diversion purification treatment component includes a treatment box 101 arranged on the top of the base 1, a limiting cylinder 102 is arranged in the treatment box 101, a packing bed 103 is arranged in the limiting cylinder 102, a slag receiving cylinder 104 is arranged at the bottom of the treatment box 101, a driving motor 105 is arranged at the bottom of the slag receiving cylinder 104, an output end of the driving motor 105 passes through the slag receiving cylinder 104 and the treatment box 101 and extends to the packing bed 103, and a valve 106 is arranged at the bottom of the limiting cylinder 102; A separator 2 is arranged on the top of the treatment box 101, a disperser 201 is arranged on the top of the inner cavity of the separator 2, a mist catcher 203 is arranged on the bottom of the disperser 201, a gathering cover 204 is sleeved on the outer side of the mist catcher 203, limiting plates 202 are arranged on both sides of the disperser 201, a hanging ring 205 is arranged on the top of the disperser 201, the hanging ring 205 is suspended on the top of the inner cavity of the separator 2, a first hose 206 is arranged on one side of the surface of the separator 2, one end of the first hose 206 extends to the collector 3, a second hose 207 is arranged on one end of the disperser 201, the second hose 207 penetrates the separator 2 and extends to one side of the surface of the separator 2, a tee 208 is arranged on the bottom of the tee 208, a pump 209 is arranged on the bottom of the pump 209, and a regeneration circulator 210 is arranged on the bottom of the pump 209; A collector 3 is provided on one side of the surface of the separator 2, a drainage tank 301 is provided at the bottom of the collector 3, and the drainage tank 301 is installed on the base 1. A sedimentation tank 302 is provided on one side of the processing box 101, and the sedimentation tank 302 is installed on the base 1. A gas inlet 303 is provided on one side of the surface of the processing box 101, and a third hose liquid discharge port 304 is provided on one side of the gas inlet 303, and the third hose liquid discharge port 304 is connected to the sedimentation tank 302 through a conduit. A fourth hose 305 is provided on one side of the sedimentation tank 302 and the drainage tank 301, and a fifth hose 306 is provided on one side of the surface of the collector 3, and the fifth hose 306 extends to the tee 208; A purification method, using the above-mentioned coalbed methane wet supergravity separation and purification device, specifically comprises the following steps: Step 1: The staff installs the device at the designated location. When treating the untreated coalbed methane containing solid particles such as coal dust and moisture, the gas enters the treatment box 101 and the separator 2 from the gas inlet 303, passes through the packing bed 103 in the limiting cylinder 102, and makes the gas flow along the axial direction of the packing bed 103. Compared with the baffled rotating bed, there is no need to overcome the centrifugal resistance, the gas flow channel cross-section is uniform, the gas velocity is constant, the gas phase resistance is small, and it is suitable for large-flow gas-liquid mass transfer; Step 2: The packing bed 103 is driven by the driving motor 105 to rotate at high speed. By adjusting the speed of the packing bed 103, the pressure drop of the packing bed 103 increases with the increase of the speed. At the same time, when the device is in use, the valve 106 can be opened to allow the packing bed 103 to fall into the slag receiving tube 104, so that the packing bed 103 can be replaced conveniently. Step 3, the outflow component at the bottom of the packed bed 103 is transported to the settling tank 302 through the conduit to achieve solid-liquid separation, and obtain triethylene glycol rich liquid, which then enters the regeneration circulator 210; Step 4: The outflow component from the top of the separator 2 is the coal-bed methane after water and dust removal, which is removed by the mist collector 203 to remove triethylene glycol, and the dry and clean coal-bed methane is transported from the first hose 206 to the tee 208 through the fifth hose 306 for regeneration and recycling; Step 5: After being collected and transported from the gas well, the coalbed methane containing solid particles and water in the coal powder layer enters the processing box 101. After the dust-containing gas enters the packed bed 103, it is subjected to the centrifugal force. Due to the different densities of gas and dust particles, the larger dust particles have greater kinetic energy and break away from the gas running track. They are thrown to the limiting cylinder 102 and discharged with the water flow. Step six, the triethylene glycol absorption liquid is transported to the separator 2 through the pump 209 and the second hose 207, and is dispersed at the inner edge of the packing through the disperser 201. Under the action of supergravity, the triethylene glycol liquid is crushed into droplets, liquid filaments and liquid films attached to the surface of the packing bed 103 in the packing bed 103. On the one hand, the contact area with the dust-containing gas is increased, and collides with the uncaptured dust particles in the gas, and the dust particles are captured by inertial collision, interception and the Brownian diffusion movement of the dust particles themselves. On the other hand, the triethylene glycol absorption liquid completes the water absorption reaction during the countercurrent contact with the coalbed methane gas in the packing bed 103, and then it is concentrated and flows into the settling tank 302. The gas-liquid two phases complete the dust removal and water removal purification of the coalbed methane by the absorption liquid under the conditions of high turbulence, large phase interface and high-speed renewal of the phase interface.

[0021] According to the above structure, when the untreated coalbed methane containing solid particles such as coal dust and moisture is treated, the gas enters the treatment box 101 and the separator 2 from the gas inlet 303, passes through the packing bed 103 in the limiting cylinder 102, and makes the gas flow along the axial direction of the packing bed 103. Compared with the baffled rotating bed, there is no need to overcome the centrifugal resistance, the gas flow channel cross-section is uniform, the gas velocity is constant, the gas phase resistance is small, and it is suitable for large-flow gas-liquid mass transfer; The packing bed 103 is driven by the driving motor 105 to rotate at a high speed. By adjusting the speed of the packing bed 103, the pressure drop of the packing bed 103 increases with the increase of the speed. When the device is in use, the valve 106 can be opened to allow the packing bed 103 to fall into the slag receiving tube 104, which is convenient for replacing the packing bed 103. The outflow components at the bottom of the packing bed 103 are transported to the settling tank 302 through the conduit to achieve solid-liquid separation, obtain triethylene glycol rich liquid, and then enter the regeneration circulator 210. The outflow component at the top of the separator 2 is the coal-bed methane after water and dust removal. The triethylene glycol is removed by the mist collector 203 to obtain dry and clean coal-bed methane, which is transported from the first hose 206 to the tee 208 through the fifth hose 306 for regeneration and recycling. The coal-bed methane containing solid particles and water in the coal powder layer after being collected and transported from the gas well enters the processing box 101. After the dust-containing gas enters the packed bed 103, it is affected by centrifugal force. Due to the different densities of gas and dust particles, larger dust particles have greater kinetic energy to break away from the gas running track, and are thrown to the limit cylinder 102 and discharged with the water flow. The triethylene glycol absorption liquid is transported to the separator 2 through the pump 209 and the second hose 207, and is dispersed at the inner edge of the packing through the disperser 201. Under the action of supergravity, the triethylene glycol liquid is crushed into droplets, liquid filaments and liquid films attached to the surface of the packing bed 103 in the packing bed 103. On the one hand, the contact area with the dust-containing gas is increased, and collides with the uncaptured dust particles in the gas, and the dust particles are captured by inertial collision, interception and the Brownian diffusion movement of the dust particles themselves. On the other hand, the triethylene glycol absorption liquid completes the water absorption reaction during the countercurrent contact with the coalbed methane gas in the packing bed 103, and then concentrates and flows into the settling tank 302. The gas-liquid two phases complete the dust removal and water removal purification effects of the absorption liquid on the coalbed methane under the conditions of high turbulence, large phase interface and high-speed phase interface renewal.

[0022] Different from the prior art, the present application discloses a wet ultra-gravity separation and purification device for coalbed methane and a purification method thereof. By allowing gas to flow axially along a packed bed 103, there is no need to overcome centrifugal resistance compared to a baffled rotating bed. The cross-section of the gas flow channel is uniform, the gas velocity is constant, the gas phase resistance is small, and it is suitable for large-flow gas-liquid mass transfer. By adjusting the rotation speed of the packed bed 103, the pressure drop of the packed bed 103 increases with the increase of the rotation speed, and the outflow component at the bottom of the packed bed 103 is transported to a settling tank 302 through a conduit to achieve solid-liquid separation, thereby obtaining a triethylene glycol rich liquid, which then enters a regeneration circulator 210. The outflow component at the top of the separator 2 is the coalbed methane after dewatering and dust removal. The triethylene glycol is removed through a mist collector 203 to obtain dry and clean coalbed methane, which is transported from the first hose 206 through the fifth hose 306 to the tee 208 for regeneration and recycling, thereby increasing the contact area with the dust-containing gas. The gas-liquid two phases complete the dust removal and dewatering purification effects of the absorption liquid on the coalbed methane under the conditions of high turbulence, a large phase interface and high-speed renewal of the phase interface.

[0023] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A coalbed methane wet ultra-gravity separation and purification device, comprising a base (1), characterized in that: The base (1) is provided with a diversion and purification treatment component; The diversion purification treatment component comprises a treatment box (101) arranged on the top of the base (1), a limiting cylinder (102) is arranged in the treatment box (101), and a filler bed (103) is arranged in the limiting cylinder (102); A separator (2) is arranged on the top of the processing box (101), a disperser (201) is arranged on the top of the inner cavity of the separator (2), a mist collector (203) is arranged on the bottom of the disperser (201), and a gathering cover (204) is arranged on the outer side of the mist collector (203); A collector (3) is provided on one side of the surface of the separator (2); a sewage drain pool (301) is provided at the bottom of the collector (3); the sewage drain pool (301) is installed on the base (1); a sedimentation tank (302) is provided on one side of the treatment box (101); and the sedimentation tank (302) is installed on the base (1).

2. The wet type ultra-gravity separation and purification device for coal-bed methane according to claim 1 is characterized in that: A slag receiving barrel (104) is provided at the bottom of the processing box (101), and a driving motor (105) is provided at the bottom of the slag receiving barrel (104).

3. The wet type ultra-gravity separation and purification device for coal-bed methane according to claim 2 is characterized in that: The output end of the driving motor (105) passes through the slag receiving cylinder (104) and the processing box (101) and extends to the packing bed (103); a valve (106) is provided at the bottom of the limiting cylinder (102).

4. The wet type ultra-gravity separation and purification device for coal-bed methane according to claim 1 is characterized in that: Limiting plates (202) are provided on both sides of the disperser (201), and a hanging ring (205) is provided on the top of the disperser (201), wherein the hanging ring (205) is suspended on the top of the inner cavity of the separator (2).

5. The wet type ultra-gravity separation and purification device for coal-bed methane according to claim 1 is characterized in that: A first hose (206) is provided on one side of the surface of the separator (2), and one end of the first hose (206) extends to the collector (3).

6. The wet type ultra-gravity separation and purification device for coal-bed methane according to claim 1 is characterized in that: A second hose (207) is provided at one end of the disperser (201), and the second hose (207) passes through the separator (2) and extends to one side of the surface of the separator (2).

7. The wet type ultra-gravity separation and purification device for coal bed gas according to claim 6 is characterized in that: A tee (208) is provided at the bottom end of the second hose (207), a pump (209) is provided at the bottom of the tee (208), and a regeneration circulator (210) is provided at the bottom of the pump (209).

8. The coalbed methane wet ultra-gravity separation and purification device according to claim 1, characterized in that: A gas inlet (303) is provided on one side of the surface of the processing box (101), a third hose liquid discharge port (304) is provided on one side of the gas inlet (303), and the third hose liquid discharge port (304) is connected to the sedimentation tank (302) through a conduit.

9. The coalbed methane wet ultra-gravity separation and purification device according to claim 1, characterized in that: A fourth hose (305) is provided on one side of the sedimentation tank (302) and the sewage tank (301), and a fifth hose (306) is provided on one side of the surface of the collector (3), and the fifth hose (306) extends to the tee (208).

10. A purification method, using the coalbed methane wet ultra-gravity separation and purification device according to any one of claims 1 to 9, characterized in that: The specific steps include: Step 1: When the coalbed methane to be treated contains solid particles such as coal dust and moisture, it enters the treatment box (101) and the separator (2) from the gas inlet (303), passes through the packing bed (103) in the limiting cylinder (102), and makes the gas flow axially along the packing bed (103); Step 2: The packing bed (103) is driven to rotate at high speed by the driving motor (105). By adjusting the rotation speed of the packing bed (103), the pressure drop of the packing bed (103) increases as the rotation speed increases. By opening the valve (106), the packing bed (103) is allowed to fall into the slag receiving tube (104), so that the packing bed (103) can be replaced easily. Step 3, the outflow component at the bottom of the packing bed (103) is transported to the settling tank (302) through the conduit to achieve solid-liquid separation, thereby obtaining triethylene glycol rich liquid, which then enters the regeneration circulator (210); Step 4: the outflow component at the top of the separator (2) is the coal-bed methane after water and dust removal, which is removed from the mist collector (203) to remove triethylene glycol, and the dry and clean coal-bed methane is transported from the first hose (206) through the fifth hose (306) to the tee (208) for regeneration and recycling; Step 5, the coalbed methane containing solid particles and water in the coal powder layer after being collected and transported from the gas well enters the processing box (101), and the dust-containing gas enters the packing bed (103), is affected by the centrifugal force, is thrown to the limit cylinder (102) and is discharged with the water flow; In step six, the triethylene glycol absorption liquid is transported to the separator (2) through the pump (209) and the second hose (207), and is dispersed at the inner edge of the packing through the disperser (201). The triethylene glycol liquid is crushed into droplets, liquid filaments and a liquid film attached to the surface of the packing bed (103) in the packing bed (103), thereby increasing the contact area with the dust-containing gas. The triethylene glycol absorption liquid completes the water absorption reaction during the countercurrent contact with the coalbed methane gas in the packing bed (103), and then flows into the settling tank (302) in a concentrated manner. The gas-liquid two phases complete the dust removal and water removal purification of the coalbed methane by the absorption liquid under the conditions of high turbulence, large phase interface and high-speed phase interface renewal.

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