A purification device for a production well site used in coalbed methane extraction

Abstract

The present invention discloses a purification device for a production well site used in coalbed methane extraction, specifically relating to the technical field of purification devices. It includes a main pipe, and a preliminary filtration component is fixedly installed at the upper end of the main pipe. A drying component is fixedly installed at the upper end of the preliminary filtration component. A transmission component is fixedly installed at the lower rear side of the outer surface of the drying component, and a mounting plate is fixedly connected to the upper part of the outer surface of the transmission component. The purification device for a production well site used in coalbed methane extraction according to the present invention can achieve the rapid replacement of the filtration device and the effect of cleaning the surface of the filtration device during use through the provided preliminary filtration component. At the same time, through the provided drying component, the efficiency of drying the subsequent coalbed methane can be improved. Through the provided transmission component, the fully mixing of the dried coalbed methane and the amine liquid inside it can be improved, and the gas can be fully mixed inside the transmission component, thereby improving the purification efficiency during coalbed methane extraction.

Description

Technical Field

[0001] The present invention relates to the technical field of purification devices, and particularly to a purification device for a production well site for coalbed methane extraction. Background Art

[0002] The purification device for a production well site for coalbed methane extraction mainly processes the freshly extracted coalbed methane. The coalbed methane contains methane, carbon dioxide, nitrogen, hydrogen sulfide, solid impurities, etc. This device first passes through a filtration unit, using filters with different precisions, such as mechanical filters and fine filters, to remove solid particles such as coal powder and cuttings. Then comes the dehydration unit, which uses hygroscopic agents or adsorbent materials to reduce the moisture in the coalbed methane, preventing pipeline corrosion and hydrate blockage. The desulfurization unit reduces harmful gases through chemical absorption or adsorption means, such as absorbing hydrogen sulfide with amine solution. The decarbonization unit uses physical or chemical methods to remove carbon dioxide and increase the calorific value of the coalbed methane.

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

[0004] Chinese Patent Publication No. CN116899346A discloses a purification device for a production well site for coalbed methane extraction, which relates to the field of air purification of operating wells. The main points of its technical solution include: a lower housing; an upper housing installed on the top of the lower housing; a filtering component arranged inside the lower housing, and the filtering component is used for filtering harmful gases in the production well site. The filtering layer includes a filtering layer. A purification device for a production well site for coalbed methane extraction, 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 usage state of the activated carbon layer according to the calculation result. In this way, by collecting the real-time data of the filtered gas and repeatedly calculating at a set time interval to confirm whether the activated carbon reaches the saturated state, the calculation result can match the state change of the filtered gas, so as to improve the accuracy of judging the saturated state of the activated carbon, which is beneficial to avoiding the problem of premature or late replacement of the activated carbon.

[0005] Although the device in the above patent document can play a role in filtering during coalbed gas extraction, in actual use, the effect of only using the activated carbon layer for adsorption is not ideal, thus reducing the filtering effect on coalbed methane. Summary of the Invention

[0006] The main purpose of the present invention is to provide a purification device for a production well site for coalbed methane extraction, which can effectively solve the problem that although it can play a role in filtering during coalbed gas extraction, in actual use, the effect of only using the activated carbon layer for adsorption is not ideal, thus reducing the filtering effect on coalbed methane.

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

[0008] A purification device for a production well site for coalbed methane extraction, comprising a main pipe, a preliminary filtration component is fixedly installed at the upper end of the main pipe, a drying component is fixedly installed at the upper end of the preliminary filtration component, a transmission component is fixedly installed at the lower rear side of the outer surface of the drying component, a mounting plate is fixedly connected to the upper part of the outer surface of the transmission component, and an air extraction pump is fixedly connected to the rear part of the upper end of the mounting plate.

[0009] Preferably, the preliminary filtration component includes a straight pipe one fixedly connected to the upper end of the main pipe. An annular groove is formed at the upper edge of the inner surface of the straight pipe one. An arc-shaped hole penetrating through the upper right side of the outer surface of the straight pipe one is formed at the upper left part of the outer surface of the straight pipe one. Both of the two arc-shaped holes are located above the annular groove. Arc-shaped baffles are rotatably connected to the front edge of the bottom wall and the front edge of the top wall of both of the two arc-shaped holes. A scraping component is slidably installed on the inner surface of the annular groove.

[0010] Preferably, the scraping component includes an annular plate slidably connected to the inner surface of the annular groove. Four support rods one are fixedly connected to the inner surface of the annular plate in an annular array. A connecting column is fixedly connected to the mutually approaching ends of the four support rods one. 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 above the annular plate, and the outer diameter of the filter plate is equal to that between the arc-shaped holes.

[0012] Preferably, the drying component includes a U-shaped pipe one fixedly connected to the upper end of the straight pipe one. A plurality of resistance heating wires one are fixedly connected to the outer surface of the U-shaped pipe one in an annular array. Four support rods two are fixedly connected to the inner surface of the U-shaped pipe one close to one side of the inner surface of the straight pipe one in an annular array. An arc-shaped rod one is fixedly connected to the mutually approaching ends of the four support rods two. 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 pipe two fixedly connected to the other end of the U-shaped pipe one. An arc-shaped pipe two is fixedly connected to the lower end of the straight pipe two. A plurality of resistance heating wires two are fixedly connected to the lower part of the outer surface of the arc-shaped pipe two in an annular array. An L-shaped pipe is fixedly connected to the other end of the arc-shaped pipe two. A straight pipe three is fixedly connected to the rear end of the L-shaped pipe. An air outlet pipe is fixedly connected to the rear edge of the inner surface of the straight pipe three. An adsorption component is provided on the inner surface of the arc-shaped pipe two, and a partition component is provided in the middle of the upper side of the outer surface of the arc-shaped pipe two.

[0014] Preferably, the adsorption assembly includes a first connecting rod. The front part of the upper end of the first connecting rod is fixedly connected to the rear part of the lower end of the arc-shaped rod. The lower end of the first connecting rod is fixedly connected to an arc-shaped rod. A second spiral plate is fixedly connected to the outer surface of the arc-shaped rod. The other end of the arc-shaped rod is fixedly connected to a second connecting rod. The upper end of the second connecting rod is fixedly connected to the upper part of the outer surface of the L-shaped pipe.

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

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

[0017] Preferably, the partition component includes a partition plate. A water filling port is provided in the middle of the upper side of the outer surface of the arc-shaped pipe. A partition plate is provided on the inner surface of the water filling port. A handle is fixedly connected to the middle of the upper side of the outer surface of the partition plate. Support plates are fixedly connected to the middle of the front end and the middle of the rear end of the partition plate. Support grooves are provided in the upper part of the front side wall and the upper part of the rear side wall of the inner surface of the water filling port. The support grooves on the same side cooperate with the support plates on the same side.

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

[0019] 1. The preliminary filtration component provided in the present invention can achieve the rapid replacement of the filtration device and the cleaning of the surface of the filtration device during use. At the same time, by setting the drying component, the efficiency of drying the coalbed methane subsequently can be improved. Under the auxiliary action of the transmission component, the gas required for mining can be generated, thereby improving the filtration effect of the coalbed methane.

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

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

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

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

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

[0025] Figure 5Schematic cross-sectional view of the local structure of the present invention;

[0026] Figure 6 Schematic diagram of the local structure of the drying component of the present invention;

[0027] Figure 7 Schematic semi-sectional view of the structure of the transmission component of the present invention;

[0028] Figure 8 Schematic diagram of the local structure of the transmission component of the present invention;

[0029] Figure 9 Schematic diagram of the structure of the adsorption component of the present invention;

[0030] Figure 10 For the present invention Figure 8 Enlarged schematic view of the structure at position A in

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

[0032] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0033] Example 1, as shown in Figure 1 , Figure 2 and Figure 3 shown, a production well field purification device for coalbed methane extraction includes a main pipe 1, and a preliminary filtration component 2 is fixedly installed at the upper end of the main pipe 1. By providing the preliminary filtration component 2, the rapid replacement of the filtration device can be realized, and the surface of the filtration device can be cleaned during use;

[0034] A drying component 3 is fixedly installed at the upper end of the preliminary filtration component 2. By providing the drying component 3, the efficiency of subsequent drying of coalbed methane can be improved. At the same time, with the assistance of the transmission component 4, the gas required for extraction can be generated, thereby improving the filtration effect of coalbed methane;

[0035] A transmission component 4 is fixedly installed at the rear side of the lower part of the outer surface of the drying component 3. By means of the provided transmission component 4, the sufficient mixing of the dried coalbed methane and the amine liquid inside it can be improved, and the gas can be fully mixed inside the transmission component 4, thereby improving the purification efficiency during the exploitation of coalbed methane.

[0036] An installation plate 5 is fixedly connected to the upper part of the outer surface of the transmission component 4, and an air extraction pump 6 is fixedly connected to the rear part of the upper end of the installation plate 5.

[0037] During the use of this solution, an extension pipe can be installed at the lower end of the main pipe 1. This extension pipe is a conventional setting in the prior art and only needs to meet the requirement of providing a sufficient pipe extension length during the exploitation of coalbed methane to facilitate the subsequent exploitation of coalbed methane at a greater depth. Therefore, the extension pipe is a conventional design in the prior art, and this solution will not elaborate on it in detail.

[0038] Embodiment 2. On the basis of Embodiment 1, for the purpose of preliminarily filtering the pumped-in gas and replacing and cleaning the filtering device.

[0039] Specifically, referring to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 ,the preliminary filtering component 2 includes a straight pipe 21 fixedly connected to the upper end of the main pipe 1. An annular groove 22 is formed at the upper edge of the inner surface of the straight pipe 21. An arc-shaped hole 23 penetrating the upper right part of the outer surface of the straight pipe 21 is formed at the upper left part of the outer surface of the straight pipe 21. Both arc-shaped holes 23 are located above the annular groove 22. Arc-shaped baffles 24 are rotatably connected to the front edges of the bottom walls and the front edges of the top walls of both arc-shaped holes 23. A scraping component 25 is slidably installed on the inner surface of the annular groove 22.

[0040] Furthermore, the scraping component 25 includes an annular plate 251 slidably connected to the inner surface of the annular groove 22. Four support rods 252 are fixedly connected to the inner surface of the annular plate 251 in an annular array. A connecting column 253 is fixedly connected to the ends of the four support rods 252 close to each other. A spiral blade 254 is fixedly connected to the lower edge of the outer surface of the connecting column 253.

[0041] Furthermore, a filter plate is provided above the annular plate 251, and the outer diameter of the filter plate is equal to that between the arc-shaped holes 23.

[0042] When the gas passes through the starting air extraction pump 6 and then enters the first straight pipe 21 through the main pipe 1, when the air flow scours the spiral blades on the surface of the spiral blade 254, the air flow will exert a force on the spiral blades. The air flow itself has momentum. When it contacts the spiral blades, due to the special spiral shape of the blades, the direction of the air flow changes. Just like the water flow impacts the blades of a waterwheel and makes it rotate, the change in the direction of the air flow will generate a component force perpendicular to the surface of the blades. This component force can be decomposed into a tangential force and an axial force. The tangential force is the key factor that makes the spiral blades rotate;

[0043] For example, for a spiral toy windmill, when blowing air at it, the air flow will impact on the blades of the windmill. Since the blades are spiral, the air flow cannot pass through directly but flows along the spiral surface of the blades, which generates a force to push the blades to rotate;

[0044] When the spiral blade 254 rotates, it can drive the connecting column 253 to rotate at the same time. Subsequently, the connecting column 253 drives the four first support rods 252 fixedly connected to it to rotate. And the four are fixedly connected to the inner surface of the annular plate 251. Therefore, it can drive the annular plate 251 to rotate on the inner surface of the annular groove 22 at the same time. And when the first support rods 252 rotate around the center point of the connecting column 253, the upper parts of the outer surfaces of the four first support rods 252 can continuously scrape the impurities on the surface of the filter plate on the upper side of the annular plate 251, preventing a large amount of dust from accumulating on the surface of the filter plate during long-term use, thus affecting the subsequent filtering effect;

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

[0046] When the filter plate needs to be replaced after long-term use, only need to rotate and open the arc-shaped baffle 24 rotatably connected to the inner surface of the arc-shaped holes 23 on both sides. And as known above, the outer diameter of the filter plate is equal to that of the arc-shaped holes 23. Therefore, only need to push the new filter plate through the arc-shaped holes 23 to the upper side of the annular plate 251 to replace the old filter plate, and then close the arc-shaped baffles 24 on both sides.

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

[0048] Example 3. On the basis of Example 2, this example aims to fully heat and dry the preliminarily filtered gas.

[0049] Specifically, refer to Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6 , the drying component 3 includes a U-shaped pipe 31 fixedly connected to the upper end of the straight pipe 21. A number of first resistance heating wires 32 are fixedly connected to the outer surface of the U-shaped pipe 31 in a circumferential array. On the inner surface of the U-shaped pipe 31, four support rods 33 are fixedly connected to the side close to the inner surface of the straight pipe 21 in a circumferential array. The mutually approaching ends of the four support rods 33 are fixedly connected together to form a first arc rod 34. A first spiral plate 35 is fixedly connected to the outer surface of the first arc rod 34.

[0050] As can be seen from the above, when the filtering plate preliminarily filters the pumped coalbed methane, it will enter the inner cavity of the U-shaped pipe 31. When entering the inner cavity of the U-shaped pipe 31, a number of first resistance heating wires 32 fixedly connected to the outer surface of the U-shaped pipe 31 in a circumferential array will heat the gas in the inner cavity of the U-shaped pipe 31. Four support rods 33 fixedly connected to the left part of the outer surface of the first arc rod 34 are fixedly connected to the inner surface of the U-shaped pipe 31, thus playing a role in fixing and supporting the first arc rod 34;

[0051] The first spiral plate 35 fixed to the outer surface of the first arc rod 34 is arranged in a spiral shape and is in mutual fit with the inner surface of the U-shaped pipe 31, thereby forming a spiral channel in the inner cavity of the U-shaped pipe 31. Subsequently, when the preliminarily filtered gas enters the inside of the spiral channel, a number of first resistance heating wires 32 fixedly connected to the outer surface of the U-shaped pipe 31 can heat the gas inside the spiral channel. When the gas flows in the spiral channel, compared with a straight pipe, its path becomes longer. The structure of the spiral channel enables the gas to more fully contact the inner wall of the U-shaped pipe 31, 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, thus better achieving the heating effect, and the heated gas will be drier.

[0052] The above-mentioned number of first resistance heating wires 32 is a conventional design in the prior art, and its specific working principle is as follows:

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

[0054] The material of the first resistance heating wire 32 will have a hindering effect on the current, and the interaction between the current and the resistance causes the energy to be converted into heat energy;

[0055] The first resistance heating wire 32 gets hot when passing through current and transfers this heat to the surrounding air or object;

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

[0057] Therefore, the first 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. On the basis of Embodiment 3, this embodiment aims to desulfurize the gas after drying treatment.

[0059] Specifically, referring to Figure 1 、 Figure 2 、 Figure 3 、 Figure 7 、 Figure 8 、 Figure 9 and Figure 10 , the transmission component 4 includes a second straight pipe 41 fixedly connected to the other end of the first U-shaped pipe 31. The lower end of the second straight pipe 41 is fixedly connected with a second arc-shaped pipe 42. A number of second resistance heating wires 43 are fixedly connected in a circular array on the lower part of the outer surface of the second arc-shaped pipe 42. The other end of the second arc-shaped pipe 42 is fixedly connected with an L-shaped pipe 44. The rear end of the L-shaped pipe 44 is fixedly connected with a third straight pipe 45. An air outlet pipe 46 is fixedly connected to the rear edge of the inner surface of the third straight pipe 45. An adsorption component 47 is arranged on the inner surface of the second arc-shaped pipe 42, and a partition component 48 is arranged in the middle of the upper side of the outer surface of the second arc-shaped pipe 42.

[0060] Furthermore, the adsorption component 47 includes a first connecting rod 471. The front part of the upper end of the first connecting rod 471 is fixedly connected to the rear part of the lower end of the first arc-shaped rod 34. The lower end of the first connecting rod 471 is fixedly connected with a second arc-shaped rod 472. A second spiral plate 474 is fixedly connected to the outer surface of the second arc-shaped rod 472. The other end of the second arc-shaped rod 472 is fixedly connected with a second connecting rod 473. The upper end of the second connecting rod 473 is fixedly connected to the upper part of the outer surface of the L-shaped pipe 44.

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

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

[0063] Further, the partition component 48 includes a partition plate 482. A water filling port 481 is formed in the middle of the upper side of the outer surface of the second arc-shaped pipe 42. A partition plate 482 is provided on the inner surface of the water filling port 481. A handle 484 is fixedly connected to the middle of the upper side of the outer surface of the partition plate 482. Support plates 483 are fixedly connected to the middle of the front end and the middle of the rear end of the partition plate 482 respectively. Support grooves 480 are formed in the upper part of the front side wall and the upper part of the rear side wall of the inner surface of the water filling port 481. The support grooves 480 on the same side cooperate with the support plates 483 on the same side.

[0064] Before use, the partition plate 482 can be lifted upward by holding the handle 484. At this time, the water filling port 481 is in an open state. Then, amine liquid is added into the inner cavity of the second arc-shaped pipe 42 from the water filling port 481. Since one end of the first connecting rod 471 is fixedly connected to one end of the first arc-shaped rod 34, and the other end of the first connecting rod 471 is fixedly connected to a second arc-shaped rod 472, and the second spiral plate 474 fixedly connected to the outer surface of the second arc-shaped rod 472 is spirally distributed and the second spiral plate 474 is in close contact with the inner surface of the second arc-shaped pipe 42, a spiral channel is formed in the second arc-shaped pipe 42.

[0065] The highest liquid level of the added amine liquid is just located below the water filling port 481. Then, the partition plate 482 is covered on the inner cavity of the water filling port 481. At this time, the support plates 483 fixedly connected to both sides of the partition plate 482 are just engaged in the support grooves 480 on the same side. Then, the air pump 6 is started, and the suction force generated by the air pump 6 can extract coalbed methane from the main pipe 1 into the inner cavity of the third straight pipe 45, so as to realize the air extraction operation in the above embodiment.

[0066] When the dried and filtered gas enters the inner cavity of the second arc-shaped pipe 42 from the inner cavity of the second straight pipe 41, since a spiral channel is formed in the inner cavity of the second arc-shaped pipe 42 under the action of the second spiral plate 474, the gas can be fully mixed with the amine liquid in the spiral channel. The characteristics of the spiral channel have been described in detail in the above embodiment, so no more details will be given in this embodiment.

[0067] When the filtered gas is mixed with the amine solution, several resistance heating wires II 43 fixedly connected to the outer surface of the arc-shaped pipe II 42 can heat the mixed liquid in the arc-shaped pipe II 42. During heating, it can accelerate the absorption of hydrogen sulfide in coalbed methane by the amine solution, thereby purifying the coalbed methane. Subsequently, when the air pump 6 pumps air, the amine solution will be pushed from the front side of the arc-shaped pipe II 42 to the upper side of the L-shaped pipe 44. As described above, the length of the L-shaped pipe 44 is greater than that of the straight pipe II 41. Therefore, the amine solution naturally accumulates at the bottom of the arc-shaped pipe II 42 under the action of gravity. The heights of the amine solutions on the left and right sides are the same in the equilibrium state. The gravity of the amine solution is vertically downward. When the amine solution wants to flow out, it must overcome the pressure generated by the liquid column height difference formed in its curved part. However, the length of the L-shaped pipe 44 is greater than that of the straight pipe II 41. Therefore, when the amine solution is pumped to about half of the length of the L-shaped pipe 44, the liquid level of the amine solution will tilt, and then it will fall back into the inner cavity of the arc-shaped pipe II 42 under the influence of gravity. This process repeats, thereby improving the mixing efficiency of the amine solution and the filtered gas. Finally, the purified gas will enter the outlet pipe 46 from the straight pipe III 45 and is finally discharged outward from the output end of the air pump 6.

[0068] The working principle of the several resistance heating wires II 43 described above is the same as that of the several resistance heating wires I 32 described above, and both are conventional settings in the prior art. Therefore, this solution will not be elaborated too much here.

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

[0070] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A purification device for a production well field for coalbed methane exploitation, comprising a main pipe (1), characterized in that: A preliminary filter 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 filter 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 part of the outer surface of the transmission assembly (4), a vacuum pump (6) is fixedly connected to the upper rear part of the mounting plate (5), and the drying assembly (3) comprises an arc-shaped rod (34); The preliminary filtering assembly (2) comprises a straight tube (21) fixedly connected to the upper end of the main tube (1); an annular groove (22) is provided at the upper edge of the inner surface of the straight tube (21); an arc-shaped hole (23) is provided at the upper left portion of the outer surface of the straight tube (21) and penetrates the upper right portion of the outer surface of the straight tube (21); two arc-shaped holes (23) are both located on the upper side of 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); The scraping assembly (25) comprises an annular plate (251), the annular plate (251) being slidably connected to the inner surface of the annular groove (22), four support rods (252) being fixedly connected in an annular array to the inner surface of the annular plate (251), a connecting column (253) being fixedly connected at one end of the four support rods (252) close to each other, and a spiral blade (254) being fixedly connected to the lower edge of the outer surface of the connecting column (253); The drying component (3) comprises a U-shaped tube (31) fixedly connected to the upper end of the straight tube (21), the transmission component (4) comprises a straight tube (41) fixedly connected to the other end of the U-shaped tube (31), the lower end of the straight tube (41) is fixedly connected to an arc-shaped tube (42), a plurality of resistance heating wires (43) are fixedly connected in a circular array at the lower part of the outer surface of the arc-shaped tube (42), the other end of the arc-shaped tube (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 (45), the rear edge of the inner surface of the straight tube (45) is fixedly connected to an air outlet pipe (46), the inner surface of the arc-shaped tube (42) is provided with an adsorption component (47), and the middle part of the upper side of the outer surface of the arc-shaped tube (42) is provided with a baffle component (48); The adsorption assembly (47) comprises a connecting rod 1 (471), the front portion of the upper end of the connecting rod 1 (471) is fixedly connected to the rear portion of the lower end of the arc-shaped rod 1 (34), the lower end of the connecting rod 1 (471) is fixedly connected to an arc-shaped rod 2 (472), the outer surface of the arc-shaped rod 2 (472) is fixedly connected to a spiral plate 2 (474), and the other end of the arc-shaped rod 2 (472) is fixedly connected to a connecting rod 2 (473); The baffle assembly (48) comprises a baffle (482), a water inlet (481) is provided at the middle of the upper side of the outer surface of the second arc-shaped tube (42), a baffle (482) is provided at the inner surface of the water inlet (481), 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 at 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.

2. The purification device for coalbed methane production well field according to claim 1, characterized in that: A filter plate is provided on the upper side of the annular plate (251).

3. The purification device for coalbed methane production well field according to claim 1, characterized in that: A plurality of resistance heating wires (32) are fixedly connected in an annular array on 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); one end of the four support rods (33) close to each other is fixedly connected to an arc rod (34); and the outer surface of the arc rod (34) is fixedly connected to a spiral plate (35).

4. The purification device for coalbed methane production well field according to claim 1, 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).

5. The purification device for coalbed methane production well field according to claim 1, characterized in that: The length of the L-shaped tube (44) is greater than the length of the second straight tube (41), and the upper end of the second connecting rod (473) is fixedly connected to the upper part of the outer surface of the L-shaped tube (44).

6. The purification device for coalbed methane production well field according to claim 1, characterized in that: A handle (484) is fixedly connected to the middle portion of the upper side of the outer surface of the partition (482).

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