Production well site purification device for coal bed gas exploitation

Abstract

The invention discloses a production well site purification device for coal bed gas exploitation, and particularly relates to the technical field of purification devices.The production well site purification device comprises a main pipe, a preliminary filtering assembly is fixedly installed at the upper end of the main pipe, a drying assembly is fixedly installed at the upper end of the preliminary filtering assembly, and a conveying assembly is fixedly installed on the rear side of the lower portion of the outer surface of the drying assembly; the upper portion of the outer surface of the transmission assembly is fixedly connected with a mounting plate. According to the production well site purification device for coal bed gas exploitation, the effects of rapidly replacing the filtering device and cleaning the surface of the filtering device during use can be achieved through the arranged preliminary filtering assembly, meanwhile, through the arranged drying assembly, the follow-up drying efficiency of coal bed gas can be improved, and the production well site purification device for coal bed gas exploitation is convenient to use. By arranging the conveying assembly, the dried coal bed gas and the amine liquid in the coal bed gas can be fully mixed, and the gas can be fully mixed in the conveying assembly, so that the purification efficiency during coal bed gas exploitation is improved.

Description

Technical Field

[0001] The invention relates to the technical field of purification devices, and in particular to a purification device for a production well field used for coal bed gas exploitation. Background Art

[0002] Coalbed methane exploitation uses a production well site purification device, which mainly processes the newly mined coalbed methane, which contains methane, carbon dioxide, nitrogen, hydrogen sulfide and solid impurities. The device first uses a filtration unit to remove solid particles such as coal powder and rock cuttings using filters of different precisions, such as mechanical filters and fine filters. Then, a dehydration unit uses a desiccant or adsorbent material to reduce the moisture in the coalbed methane to prevent pipeline corrosion and hydrate blockage. The desulfurization unit uses chemical absorption or adsorption means, such as using amine liquid to absorb hydrogen sulfide, to reduce harmful gases. The decarbonization unit uses physical or chemical methods to remove carbon dioxide and increase the calorific value of coalbed methane.

[0003] This device is very important. It can improve the quality of coalbed methane, make it more in line with utilization standards, increase economic value, and reduce safety risks and environmental pollution.

[0004] Chinese patent announcement number CN116899346A discloses a purification device for coalbed methane production wells, which relates to the field of air purification in working wells. The technical solution includes: a lower shell; an upper shell installed on the top of the lower shell; a filter component arranged inside the lower shell, the filter component is used to filter harmful gases in the production wells, and the filter layer includes a filter layer. A purification device for coalbed methane production wells, by setting a concentration detection component, a flow rate detection component and a controller, can calculate the filtration amount of the activated carbon layer per unit time, and determine the use status of the activated carbon layer according to the calculation result, so that the real-time data of the data filtering gas is collected, and the activated carbon is repeatedly calculated at a set time interval to confirm whether the activated carbon has reached a saturated state, so that the calculation result can match the state change of the filtered gas, so as to improve the accuracy of judging the saturation state of the activated carbon, which is conducive to avoiding the problem of replacing the activated carbon too early or too late.

[0005] Although the device in the above patent document can filter coalbed methane during mining, in actual use, the effect of adsorption by only using an activated carbon layer is not ideal, thereby reducing the filtering effect of coalbed methane. Summary of the invention

[0006] The main purpose of the present invention is to provide a purification device for a production well field for coalbed methane exploitation, which can effectively solve the problem that although it can filter the coalbed methane during exploitation, in actual use, the effect of adsorption using only an activated carbon layer is not ideal, thereby reducing the filtering effect of the coalbed methane.

[0007] To achieve the above object, the technical solution adopted by the present invention is:

[0008] A purification device for a production well field used for coalbed methane development comprises a main pipe, a preliminary filtering assembly is fixedly mounted on the upper end of the main pipe, a drying assembly is fixedly mounted on the upper end of the preliminary filtering assembly, a transmission assembly is fixedly mounted on the rear side of the lower portion of the outer surface of the drying assembly, a mounting plate is fixedly connected to the upper portion of the outer surface of the transmission assembly, and a vacuum pump is fixedly connected to the rear portion of the upper end of the mounting plate.

[0009] Preferably, the preliminary filtering assembly includes a straight tube 1 fixedly connected to the upper end of the main tube, an annular groove is provided at the upper edge of the inner surface of the straight tube 1, an arc-shaped hole is provided on the upper left portion of the outer surface of the straight tube 1 and penetrates the upper right portion of the outer surface of the straight tube 1, two of the arc-shaped holes are located on the upper side of the annular groove, an arc-shaped baffle is rotatably connected at the front edge of the bottom wall and the front edge of the top wall of the two arc-shaped holes, and a scraping assembly is slidably installed on the inner surface of the annular groove.

[0010] Preferably, the scraping assembly includes an annular plate, which is slidably connected to the inner surface of the annular groove, and four support rods are fixedly connected to the annular array on the inner surface of the annular plate, and the four support rods are fixedly connected to a connecting column at one end close to each other, and a spiral blade is fixedly connected to the lower edge of the outer surface of the connecting column.

[0011] Preferably, a filter plate is provided on the upper side of the annular plate, and the outer diameter of the filter plate is equal to the arc-shaped hole.

[0012] Preferably, the drying component includes a U-shaped tube one fixedly connected to the upper end of the straight tube one, a plurality of resistance heating wires one are fixedly connected in a circular array on the outer surface of the U-shaped tube one, four support rods two are fixedly connected in a circular array on one side of the inner surface of the U-shaped tube one close to the inner surface of the straight tube one, an arc-shaped rod one is commonly fixedly connected at one end of the four support rods two close to each other, and a spiral plate one is fixedly connected to the outer surface of the arc-shaped rod one.

[0013] Preferably, the transmission component includes a straight tube 2 fixedly connected to the other end of the U-shaped tube 1, the lower end of the straight tube 2 is fixedly connected to an arc-shaped tube 2, a plurality of resistance heating wires 2 are fixedly connected to a circular array at the lower part of the outer surface of the arc-shaped tube 2, the other end of the arc-shaped tube 2 is fixedly connected to an L-shaped tube, the rear end of the L-shaped tube is fixedly connected to a straight tube 3, the rear edge of the inner surface of the straight tube 3 is fixedly connected to an outlet pipe, the inner surface of the arc-shaped tube 2 is provided with an adsorption component, and the upper middle part of the outer surface of the arc-shaped tube 2 is provided with a baffle component.

[0014] Preferably, the adsorption assembly includes a connecting rod 1, the front portion of the upper end of the connecting rod 1 is fixedly connected to the rear portion of the lower end of the arc rod, the lower end of the connecting rod is fixedly connected to an arc rod 2, the outer surface of the arc rod 2 is fixedly connected to a spiral plate 2, the other end of the arc rod 2 is fixedly connected to a connecting rod 2, and the upper end of the connecting rod 2 is fixedly connected to the upper outer surface of the L-shaped tube.

[0015] Preferably, a limiting hole is provided in the middle of the front side of the upper end of the mounting plate, the upper portion of the outer surface of the L-shaped tube is fixedly connected to the inner surface of the limiting hole, and the input end of the vacuum pump is fixedly connected to the outlet pipe.

[0016] Preferably, the length of the L-shaped tube is greater than the length of the straight tube.

[0017] Preferably, the baffle assembly includes a partition, a water inlet is provided in the middle of the upper side of the outer surface of the arc tube, a partition is provided on the inner surface of the water inlet, a handle is fixedly connected to the middle of the upper side of the outer surface of the partition, a support plate is fixedly connected to the middle of the front end and the middle of the rear end of the partition, a support groove is provided on the upper part of the front side wall of the inner surface of the water inlet and the upper part of the rear side wall of the inner surface, and the support groove on the same side cooperates with the support plate on the same side.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention can realize the rapid replacement of the filter device and the effect of cleaning the surface of the filter device when in use through the provision of the preliminary filter component. At the same time, the provision of the drying component can improve the efficiency of subsequent drying of the coalbed methane. At the same time, with the assistance of the transmission component, the gas required for mining can be generated, thereby improving the filtering effect of the coalbed methane.

[0020] 2. The transmission component provided in the present invention can improve the thorough mixing of the dried coalbed methane with the amine liquid inside it, and can make the gas thoroughly mixed inside the transmission component, thereby improving the purification efficiency during coalbed methane mining. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is another perspective overall structural schematic diagram of the present invention;

[0023] Figure 3 It is a half-section schematic diagram of the overall structure of the present invention;

[0024] Figure 4 It is a schematic diagram of the structure of the scraping component of the present invention;

[0025] Figure 5It is a schematic cross-sectional view of a local structure of the present invention;

[0026] Figure 6 It is a schematic diagram of the partial structure of the drying component of the present invention;

[0027] Figure 7 It is a half-section schematic diagram of the transmission component structure of the present invention;

[0028] Figure 8 It is a schematic diagram of the local structure of the transmission component of the present invention;

[0029] Fig. 9 It is a schematic diagram of the structure of the adsorption component of the present invention;

[0030] Fig.10 For the present invention Figure 8 A schematic diagram of the enlarged structure in the middle.

[0031] In the figure: 1, main pipe; 2, preliminary filtering component; 21, straight pipe 1; 22, annular groove; 23, arc hole; 24, arc baffle; 25, scraping component; 251, annular plate; 252, support rod 1; 253, connecting column; 254, spiral leaf; 3, drying component; 31, U-shaped pipe 1; 32, resistance heating wire 1; 33, support rod 2; 34, arc rod 1; 35, spiral plate 1; 4, transmission component; 41 , straight tube two; 42, arc tube two; 43, resistance heating wire two; 44, L-shaped tube; 45, straight tube three; 46, air outlet pipe; 47, adsorption component; 471, connecting rod one; 472, arc rod two; 473, connecting rod two; 474, spiral plate two; 48, baffle component; 481, water inlet; 482, partition; 483, support plate; 484, handle; 480, support groove; 5, mounting plate; 6, vacuum pump. DETAILED DESCRIPTION

[0032] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0033] Embodiment 1, as Figure 1 , Figure 2 and Figure 3 As shown, a purification device for coalbed methane production well field, comprising a main pipe 1, a preliminary filter assembly 2 is fixedly installed on the upper end of the main pipe 1, and the preliminary filter assembly 2 can realize the rapid replacement of the filter device and the effect of cleaning the surface of the filter device when in use;

[0034] A drying component 3 is fixedly installed on the upper end of the preliminary filtering component 2. The drying component 3 can improve the efficiency of subsequent drying of the coalbed methane. At the same time, with the assistance of the transmission component 4, the gas required for mining can be generated, thereby improving the filtering effect of the coalbed methane.

[0035] A transmission component 4 is fixedly installed on the lower rear side of the outer surface of the drying component 3. The transmission component 4 can improve the mixing of the dried coalbed methane and the amine liquid inside it, and the gas can be fully mixed inside the transmission component 4, thereby improving the purification efficiency of the coalbed methane during mining;

[0036] A mounting plate 5 is fixedly connected to the upper portion of the outer surface of the transmission component 4 , and an air pump 6 is fixedly connected to the rear portion of the upper end of the mounting plate 5 .

[0037] During use of this solution, an extension pipe can be installed at the lower end of the main pipe 1. The extension pipe is a conventional setting in the prior art and only needs to provide sufficient pipeline extension length when coalbed methane is mined to facilitate subsequent mining of coalbed methane at greater depths. Therefore, the extension pipe is a conventional design in the prior art and will not be elaborated on in detail in this solution.

[0038] Embodiment 2: Based on Embodiment 1, this embodiment is for achieving the purpose of preliminary filtering of the drawn-in gas and replacing and cleaning the filter device.

[0039] For details, see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The preliminary filtering assembly 2 includes a straight pipe 21 fixedly connected to the upper end of the main pipe 1, an annular groove 22 is provided at the upper edge of the inner surface of the straight pipe 21, an arc hole 23 is provided on the upper left side of the outer surface of the straight pipe 21 and penetrates the upper right side of the outer surface of the straight pipe 21, the two arc holes 23 are both located on the upper side of the annular groove 22, an arc baffle 24 is rotatably connected at the front edge of the bottom wall and the front edge of the top wall of the two arc holes 23, and a scraping assembly 25 is slidably installed on the inner surface of the annular groove 22.

[0040] Furthermore, the scraping assembly 25 includes an annular plate 251, which is slidably connected to the inner surface of the annular groove 22. Four support rods 252 are fixedly connected in an annular array on the inner surface of the annular plate 251. The four support rods 252 are fixedly connected at one end close to each other with a connecting column 253. The lower edge of the outer surface of the connecting column 253 is fixedly connected with a spiral blade 254.

[0041] Furthermore, a filter plate is provided on the upper side of the annular plate 251 , and the outer diameter of the filter plate is equal to the arc-shaped hole 23 .

[0042] When the gas starts the vacuum pump 6 and then enters the straight pipe 21 through the main pipe 1, when the airflow washes the spiral blades on the surface of the spiral blade 254, the airflow will exert a force on the spiral blades. The airflow itself has momentum. When it contacts the spiral blades, due to the special spiral shape of the blades, the direction of the airflow changes, just like the water flow hitting the blades of the waterwheel to make them rotate. The change in the direction of the airflow will generate a component force perpendicular to the surface of the blade. This component force can be decomposed into tangential force and axial force. The tangential force is the key factor in rotating the spiral blades.

[0043] For example, when you blow air at a spiral toy windmill, the airflow will hit the blades of the windmill. Since the blades are spiral, the airflow cannot pass directly through them, but flows along the spiral surface of the blades, which generates a force that pushes the blades to rotate.

[0044] When the spiral blade 254 rotates, the connecting column 253 can be driven to rotate at the same time, and then the connecting column 253 drives the four supporting rods 252 fixedly connected thereto to rotate, and the four supporting rods 252 are fixedly connected to the inner surface of the annular plate 251, so the annular plate 251 can be driven to rotate on the inner surface of the annular groove 22 at the same time, and when the supporting rods 252 rotate with the center point of the connecting column 253 as the center of the circle, the upper part of the outer surface of the four supporting rods 252 can continuously scrape the impurities on the surface of the filter plate on the upper side of the annular plate 251, so as to avoid a large amount of dust accumulation on the surface of the filter plate during long-term use, thereby affecting the subsequent filtering effect;

[0045] The filter plate can remove larger solid particles in coalbed methane, such as coal powder and rock chips. These particles may be taken out of the coal seam along with the gas during the mining process. The filter plate can further remove tiny solid impurities to ensure the cleanliness of the gas and prevent these solid particles from causing damage such as wear and blockage to subsequent equipment and pipelines.

[0046] When the filter plate needs to be replaced after being used for a long time, it is only necessary to rotate and open the arc baffle 24 connected to the inner surfaces of the arc holes 23 on both sides. From the above, it can be seen that the outer diameter of the filter plate is equal to the arc hole 23. Therefore, it is only necessary to push the new filter plate from the arc hole 23 to the upper side of the annular plate 251 to replace the old filter plate, and then close the arc baffles 24 on both sides.

[0047] The filter plate mentioned above is a conventional setting in the prior art. In this solution, it only needs to filter larger solid particles in the coalbed methane, such as coal powder, rock cuttings, etc., so this solution will not elaborate on it in detail.

[0048] Embodiment 3: This embodiment is based on embodiment 2 and is for achieving the purpose of fully heating and drying the gas after preliminary filtration.

[0049] For details, see Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6 The drying component 3 includes a U-shaped tube 31 fixedly connected to the upper end of the straight tube 21, a plurality of resistance heating wires 32 are fixedly connected to the outer surface of the U-shaped tube 31 in an annular array, four support rods 33 are fixedly connected to the inner surface of the U-shaped tube 31 on one side of the inner surface of the straight tube 21 in an annular array, and the four support rods 33 are fixedly connected to an arc rod 34 at one end close to each other, and a spiral plate 35 is fixedly connected to the outer surface of the arc rod 34.

[0050] From the above, it can be known that after the filter plate performs preliminary filtration on the drawn coalbed methane, it will enter the inner cavity of the U-shaped tube 31. When entering the inner cavity of the U-shaped tube 31, a plurality of resistance heating wires 32 fixedly connected to the annular array on the outer surface of the U-shaped tube 31 will heat the gas in the inner cavity of the U-shaped tube 31, and the four support rods 33 fixedly connected to the left part of the outer surface of the arc rod 34 are fixedly connected to the inner surface of the U-shaped tube 31, thereby playing a fixed supporting effect on the arc rod 34;

[0051] The spiral plate 35 fixed on the outer surface of the arc rod 34 is arranged in a spiral shape and fits with the inner surface of the U-shaped tube 31, so as to form a spiral channel in the inner cavity of the U-shaped tube 31. Then, when the gas enters the spiral channel after preliminary filtration, a plurality of resistance heating wires 32 fixedly connected to the outer surface of the U-shaped tube 31 can heat the gas inside the spiral channel. When the gas flows in the spiral channel, its path becomes longer than that of a straight pipe. The structure of the spiral channel enables the gas to more fully contact the inner wall of the U-shaped tube 31, thereby increasing the heat exchange efficiency between the gas and the inner wall. The spiral channel allows the gas to transfer heat over a longer path and time, thereby better achieving the heating effect, and the heated gas will be drier.

[0052] The above-mentioned several resistance heating wires 32 are conventional designs in the prior art, and their specific working principles are as follows:

[0053] The resistance heating wire 32 is usually made of a material with a relatively high resistance, such as a nickel-chromium alloy, an iron-chromium alloy, etc. The power supply sends current into the resistance wire through an electric conductor;

[0054] The material of the resistance heating wire 32 will hinder the current, and the interaction between the current and the resistance causes the energy to be converted into heat energy;

[0055] The resistance heating wire 32 becomes hot when current flows through it, and transfers the heat to the surrounding air or objects;

[0056] As the current continues to flow, the temperature of the resistance heating wire 32 will continue to rise until it reaches a certain operating temperature. Since the resistance of the material of the resistance heating wire 32 increases with the increase in temperature, it will maintain a stable heat output during the operation process.

[0057] Therefore, the resistance heating wire 32 mentioned above is a conventional design in the prior art, and its specific installation method, circuit connection method and control method are all conventional designs, which will not be elaborated in detail in this solution.

[0058] Embodiment 4: Based on Embodiment 3, this embodiment is for achieving the purpose of desulfurizing the gas after drying.

[0059] For details, see Figure 1 , Figure 2 , Figure 3 , Figure 7 , Figure 8 , Fig. 9 and Fig.10 The transmission component 4 includes a straight tube 2 41 fixedly connected to the other end of the U-shaped tube 1 31, an arc-shaped tube 2 42 is fixedly connected to the lower end of the straight tube 2 41, a plurality of resistance heating wires 2 43 are fixedly connected to the lower annular array on the outer surface of the arc-shaped tube 2 42, an L-shaped tube 44 is fixedly connected to the other end of the arc-shaped tube 42, a straight tube 3 45 is fixedly connected to the rear end of the L-shaped tube 44, an outlet pipe 46 is fixedly connected to the rear edge of the inner surface of the straight tube 3 45, an adsorption component 47 is provided on the inner surface of the arc-shaped tube 2 42, and a baffle component 48 is provided on the middle part of the upper side of the outer surface of the arc-shaped tube 2 42.

[0060] Furthermore, the adsorption assembly 47 includes a connecting rod 471, the front portion of the upper end of the connecting rod 471 is fixedly connected to the rear portion of the lower end of the arc rod 34, the lower end of the connecting rod 471 is fixedly connected to an arc rod 472, the outer surface of the arc rod 472 is fixedly connected to a spiral plate 474, the other end of the arc rod 472 is fixedly connected to a connecting rod 473, and the upper end of the connecting rod 473 is fixedly connected to the upper outer surface of the L-shaped tube 44.

[0061] Furthermore, a limiting hole is opened in the middle of the front upper end of the mounting plate 5 , the upper outer surface of the L-shaped tube 44 is fixedly connected to the inner surface of the limiting hole, and the input end of the vacuum pump 6 is fixedly connected to the air outlet pipe 46 .

[0062] Furthermore, the length of the L-shaped tube 44 is greater than the length of the second straight tube 41 .

[0063] Furthermore, the blocking assembly 48 includes a partition 482, a water inlet 481 is opened in the middle of the upper side of the outer surface of the arc tube 42, a partition 482 is provided on the inner surface of the water inlet 481, a handle 484 is fixedly connected to the middle of the upper side of the outer surface of the partition 482, a support plate 483 is fixedly connected to the middle of the front end and the middle of the rear end of the partition 482, and a support groove 480 is opened on the upper part of the front side wall and the upper part of the rear side wall of the inner surface of the water inlet 481, and the support groove 480 on the same side cooperates with the support plate 483 on the same side.

[0064] Before use, the partition 482 can be lifted upward by holding the handle 484, at which time the water inlet 481 is in an open state, and then the amine solution is added into the inner cavity of the arc tube 42 from the water inlet 481. Since the connecting rod 1 471 is fixedly connected to one end of the arc rod 1 34, and the other end of the connecting rod 1 471 is fixedly connected to the arc rod 2 472, and the spiral plate 2 474 fixedly connected to the outer surface of the arc rod 2 472 is distributed in a spiral shape, and the spiral plate 2 474 and the inner surface of the arc tube 2 42 fit each other, a spiral channel is formed in the arc tube 2 42;

[0065] The highest liquid level of the added amine solution is just located at the lower side of the water inlet 481, and then the partition 482 is covered on the inner cavity of the water inlet 481. At this time, the support plates 483 fixedly connected on both sides of the partition 482 are just engaged in the support grooves 480 on the same side, and then the vacuum pump 6 is started. The suction force generated by the vacuum pump 6 can extract the coalbed methane from the main pipe 1 to the inner cavity of the straight pipe 3 45, thereby realizing the vacuum operation in the above embodiment;

[0066] When the dried and filtered gas enters the inner cavity of the second arc tube 42 from the inner cavity of the second straight tube 41, a spiral channel is formed in the inner cavity of the second arc tube 42 under the action of the second spiral plate 474, so that the gas and the amine liquid in the spiral channel can be fully mixed. The characteristics of the spiral channel are described in detail in the above embodiment, so they will not be described in detail in this embodiment.

[0067] When the filtered gas is mixed with the amine liquid, the plurality of resistance heating wires 43 fixedly connected to the outer surface of the arc tube 42 can heat the mixed liquid in the arc tube 42, and the heating can accelerate the amine liquid to adsorb hydrogen sulfide in the coalbed methane, thereby purifying the coalbed methane. Subsequently, when the vacuum pump 6 is pumping gas, the amine liquid will be pushed from the front side of the arc tube 42 to the upper side of the L-shaped tube 44 by the gas. As can be seen from the above, the length of the L-shaped tube 44 is greater than the length of the straight tube 41, so the amine liquid naturally gathers at the bottom of the arc tube 42 under the action of gravity, and the height of the amine liquid on the left and right sides is 40.6mm in height under the equilibrium state. Similarly, the gravity of the amine liquid is vertically downward. When the amine liquid wants to flow out, it must overcome the pressure generated by the height difference of the liquid column formed in the curved part. However, the length of the L-shaped tube 44 is greater than the length of the straight tube 41. Therefore, when the amine liquid is pumped to a position half the length of the L-shaped tube 44, the liquid surface of the amine liquid will tilt, and then fall back into the inner cavity of the arc tube 42 under the influence of gravity, thus reciprocating, thereby improving the mixing efficiency of the amine liquid and the filtered gas. Finally, the purified gas will enter the outlet pipe 46 from the straight tube 3 45 and be discharged outward by the output end of the vacuum pump 6.

[0068] The working principle of the plurality of resistance heating wires 2 43 is the same as the working principle of the plurality of resistance heating wires 1 32 , and both are conventional settings in the prior art, so this solution will not elaborate on them in detail.

[0069] It should be noted that the specific installation method of the air pump 6, the circuit connection method and the control method used in the present invention are all conventional designs and will not be elaborated in detail in the present invention.

[0070] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A purification device for coalbed methane production well field, comprising a main pipe (1), characterized in that: A preliminary filtering assembly (2) is fixedly mounted on the upper end of the main pipe (1), a drying assembly (3) is fixedly mounted on the upper end of the preliminary filtering assembly (2), a transmission assembly (4) is fixedly mounted on the lower rear side of the outer surface of the drying assembly (3), a mounting plate (5) is fixedly connected to the upper portion of the outer surface of the transmission assembly (4), and a vacuum pump (6) is fixedly connected to the upper rear portion of the mounting plate (5).

2. The purification device for coalbed methane production well field according to claim 1, characterized in that: The preliminary filtering assembly (2) comprises a straight pipe (21) fixedly connected to the upper end of the main pipe (1); an annular groove (22) is provided at the upper edge of the inner surface of the straight pipe (21); an arc-shaped hole (23) penetrating the upper right portion of the outer surface of the straight pipe (21) is provided at the upper left portion of the outer surface of the straight pipe (21); two arc-shaped holes (23) are both located above the annular groove (22); an arc-shaped baffle (24) is rotatably connected at the front edge of the bottom wall and the front edge of the top wall of the two arc-shaped holes (23); and a scraping assembly (25) is slidably mounted on the inner surface of the annular groove (22).

3. The purification device for coalbed methane production well field according to claim 2, characterized in that: The scraping assembly (25) comprises an annular plate (251) which is slidably connected to the inner surface of the annular groove (22); four support rods (252) are fixedly connected in an annular array on the inner surface of the annular plate (251); one end of the four support rods (252) close to each other is fixedly connected to a connecting column (253); and a spiral blade (254) is fixedly connected to the lower edge of the outer surface of the connecting column (253).

4. The purification device for coalbed methane production well field according to claim 3, characterized in that: A filter plate is provided on the upper side of the annular plate (251), and the outer diameter of the filter plate is equal to that of the arc-shaped hole (23).

5. The purification device for coalbed methane production well field according to claim 2, characterized in that: The drying component (3) comprises a U-shaped tube (31) fixedly connected to the upper end of the straight tube (21); a plurality of resistance heating wires (32) are fixedly connected in an annular array to the outer surface of the U-shaped tube (31); four support rods (33) are fixedly connected in an annular array on one side of the inner surface of the U-shaped tube (31) close to the inner surface of the straight tube (21); the four support rods (33) are fixedly connected at one end thereof close to each other to an arc-shaped rod (34); and a spiral plate (35) is fixedly connected to the outer surface of the arc-shaped rod (34).

6. The purification device for coalbed methane production well field according to claim 5, characterized in that: The transmission component (4) comprises a straight tube 2 (41) fixedly connected to the other end of the U-shaped tube 1 (31); the lower end of the straight tube 2 (41) is fixedly connected to an arc-shaped tube 2 (42); a plurality of resistance heating wires 2 (43) are fixedly connected in a circular array at the lower part of the outer surface of the arc-shaped tube 2 (42); the other end of the arc-shaped tube 2 (42) is fixedly connected to an L-shaped tube (44); the rear end of the L-shaped tube (44) is fixedly connected to a straight tube 3 (45); the rear edge of the inner surface of the straight tube 3 (45) is fixedly connected to an air outlet pipe (46); an adsorption component (47) is provided on the inner surface of the arc-shaped tube 2 (42); and a baffle component (48) is provided on the middle part of the upper side of the outer surface of the arc-shaped tube 2 (42).

7. The purification device for coalbed methane production well field according to claim 6, characterized in that: The adsorption assembly (47) includes a connecting rod (471), the front upper end of the connecting rod (471) is fixedly connected to the rear lower end of the arc rod (34), the lower end of the connecting rod (471) is fixedly connected to the arc rod (472), the outer surface of the arc rod (472) is fixedly connected to the spiral plate (474), the other end of the arc rod (472) is fixedly connected to the connecting rod (473), and the upper end of the connecting rod (473) is fixedly connected to the upper outer surface of the L-shaped tube (44).

8. The purification device for coalbed methane production well field according to claim 6, characterized in that: A limiting hole is provided in the middle of the front upper end of the mounting plate (5); the upper portion of the outer surface of the L-shaped tube (44) is fixedly connected to the inner surface of the limiting hole; and the input end of the air pump (6) is fixedly connected to the air outlet pipe (46).

9. The purification device for coalbed methane production well field according to claim 8, characterized in that: The length of the L-shaped tube (44) is greater than the length of the second straight tube (41).

10. According to claim 6, a purification device for coalbed methane production well field, characterized in that: The baffle assembly (48) comprises a baffle (482), a water inlet (481) is provided in the middle of the upper side of the outer surface of the arc tube (42), a baffle (482) is provided on the inner surface of the water inlet (481), a handle (484) is fixedly connected to the middle of the upper side of the outer surface of the baffle (482), a support plate (483) is fixedly connected to the middle of the front end and the middle of the rear end of the baffle (482), a support groove (480) is provided on the upper part of the front side wall and the upper part of the rear side wall of the inner surface of the water inlet (481), and the support groove (480) on the same side cooperates with the support plate (483) on the same side.

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