Normal-temperature physical absorption type decarburization recovery device for well head gas

Abstract

The invention relates to the technical field of natural gas decarburization devices, in particular to a wellhead gas normal-temperature physical absorption type decarburization recovery device which comprises a separation tank, a reaction box is fixedly mounted in the center of the separation tank, a plurality of gas storage cylinders are fixedly mounted in the reaction box, and filter barrels are arranged in the gas storage cylinders. A plurality of rectangular holes are formed in the outer surface of the gas storage cylinder, a supporting cover is arranged at the upper end of the filtering barrel, a cleaning device is arranged between the supporting cover and the filtering barrel and used for removing impurities on the outer surface of the filtering barrel, and in the long-term operation process of the device, natural gas impurities and an absorbent can form crystals on the outer surface of the filtering barrel; then the natural gas is in full contact with the absorbent in a bubble form, the bubbles rise to drive the blades to rotate, and then the eccentric block and the knocking hammer are driven to work to knock the filter barrel, so that surface crystals are shaken off, automatic cleaning is realized, and the decarburization efficiency and long-term stable operation of the device are ensured.

Description

Technical Field

[0001] This invention relates to the field of natural gas decarbonization equipment technology, specifically to a wellhead gas ambient temperature physical absorption decarbonization and recovery device. Background Technology

[0002] Natural gas and associated gas commonly contain high concentrations of acidic gas impurities such as carbon dioxide and hydrogen sulfide. These impurities not only reduce the calorific value of natural gas but also corrode pipelines and equipment. If discharged directly without treatment, they can cause serious environmental pollution. Traditional gas decarbonization processes often employ the amine method, which utilizes the chemical reaction between amine solutions and acidic gases to achieve removal. However, the amine method suffers from problems such as high investment costs, large equipment size, complex operation, easy oxidation and degradation of amine solutions, large solution circulation volume, and high energy consumption during regeneration. It is difficult to meet the requirements of low cost and high efficiency in decentralized natural gas processing scenarios such as wellhead gas.

[0003] Existing natural gas ambient temperature physical decarbonization devices mostly improve mass transfer efficiency by adding fins or filters to extend the contact time between gas and absorbent. However, during long-term operation, due to the high impurity content in the raw natural gas, the impurities easily react with the absorbent and deposit crystals on the surface of the fins or filters. Especially at the edges, where the flow rate is slowed down, a blockage layer is more likely to form, resulting in a reduction in the gas-liquid contact area and a decrease in decarbonization efficiency. At the same time, the accumulation of deposits can also cause an increase in internal pressure, increasing the frequency of cleaning and maintenance, and affecting the continuous operation and economy of the device. Therefore, this application proposes an ambient temperature physical absorption decarbonization and recovery device for wellhead gas. Summary of the Invention

[0004] The purpose of this invention is to provide a wellhead gas ambient temperature physical absorption decarbonization and recovery device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a wellhead gas ambient temperature physical absorption decarbonization and recovery device, comprising a separation tank, a reaction chamber fixedly installed at the center of the separation tank, an outlet pipe and an inlet pipe fixedly connected to the upper and lower parts of the separation tank respectively, and a return pipe fixedly installed on the outer surface of the separation tank. A drive motor is fixedly installed at the bottom end of the return pipe by bolts, and a turbofan is fixedly connected to the output end of the drive motor. The turbofan is located inside the return pipe. Multiple gas-holding cylinders are fixedly installed inside the reaction chamber. A filter barrel is installed inside each gas-holding cylinder. A partition plate is fixedly installed at the inner end of the reaction chamber to divide the reaction chamber into upper and lower chambers. The multiple gas-holding cylinders are fixedly connected to the partition plate. Multiple rectangular holes are opened on the outer surface of each gas-holding cylinder. A support cover is provided at the upper end of the filter barrel. A cleaning device is provided between the support cover and the filter barrel to remove impurities from the outer surface of the filter barrel.

[0006] As a further embodiment of the present invention, a sealing cap is fixedly installed at the upper end of the gas storage cylinder, a limiting plate is fixedly installed at the bottom inner side of the gas storage cylinder, and multiple water seepage holes are opened on the outer surface of the limiting plate in a ring arrangement. Limiting rings are fixedly installed at both the upper and lower ends of the filter barrel, and the limiting plate is located between two limiting rings. A connecting cylinder is fixedly installed at the inner end of the support cover, and a lifting plate is provided inside the connecting cylinder. By setting a limiting plate inside the gas storage cylinder and opening a ring-shaped distribution of water seepage holes on its outer surface, natural gas can be evenly dispersed when passing through, avoiding excessive local impact that could cause structural damage.

[0007] As a further embodiment of the present invention, the cleaning device includes a passive ring, which is rotatably mounted on the bottom end of the support cover. Multiple blades are threaded through the outer surface of the passive ring, and these blades are arranged in a ring. After the filter barrel moves downwards until the passive ring is above the limiting plate, natural gas passes through the limiting plate and then through the blades. The blades, under the influence of the natural gas flow, drive the passive ring to rotate. By setting a passive ring at the bottom end of the support cover and arranging multiple blades in a ring on its outer surface, when the filter barrel moves downwards until the passive ring is above the limiting plate, natural gas enters through the limiting plate and impacts the blades, thereby driving the passive ring to rotate and achieving the cleaning function.

[0008] As a further embodiment of the present invention, the upper end of the filter barrel is detachably mounted with a bottom cover by bolts, the passive ring is rotatably connected to the bottom cover, the bottom cover is provided with a transmission ring inside, a movable cylinder is rotatably mounted on the end of the bottom cover away from the support cover, and the movable cylinder is fixedly connected to the transmission ring, two striking hammers are sleeved on the outer surface of the movable cylinder, the striking hammers are located inside the filter barrel, and the transmission ring is fixedly connected to the passive ring.

[0009] As a further embodiment of the present invention, a drive rod is fixedly connected to the end of the movable cylinder away from the bottom cover, and an eccentric block is fixedly installed at the end of the drive rod by bolts. When the drive rod rotates, it drives the eccentric block to rotate synchronously. During the rotation, the eccentric block generates a periodic eccentric force, thereby driving the hammer to generate reciprocating vibration.

[0010] As a further embodiment of the present invention, the lifting plate is rotatably connected to the drive ring, and a triangular block is fixedly connected to one end of each blade near the drive ring. A plurality of abutting balls are fixedly installed on the outer surface of the drive ring, and the abutting balls are in contact with the inclined surface of the triangular blocks.

[0011] As a further embodiment of the present invention, a driving ring is provided inside the bottom cover, and a pressure relief cylinder is provided below the support cover. The outer surface of the pressure relief cylinder has multiple vent holes, and a passive plug is inserted inside the pressure relief cylinder. By providing a driving ring inside the bottom cover and a pressure relief cylinder with multiple vent holes below the support cover, and by inserting a passive plug inside the pressure relief cylinder, when impurities cause blockage of the filter components and increase internal pressure during device operation, the passive plug can automatically activate under pressure, allowing natural gas to be discharged through the vent holes, thus preventing overpressure shutdown.

[0012] As a further embodiment of the present invention, the passive plug and the pressure relief cylinder are connected by a return spring. An isolation plate is fixedly installed inside the pressure relief cylinder. The passive plug moves upward under pressure. Once it passes the vent hole on the outer surface of the pressure relief cylinder, the high-pressure natural gas in the pressure relief cylinder flows out through the hole. Two traction lines are fixedly connected to the outer surface of the sealing cover. The ends of the traction lines are fixedly connected to the lifting plate.

[0013] As a further embodiment of the present invention, a support plate is fixedly installed at the bottom end of the sealing cover. Multiple hooks are rotatably installed on the outer surface of the support plate via a rotating shaft. A clamping plate is fixedly installed at the upper end of the isolation plate, and the hooks are connected to the clamping plate on the outer surface of the isolation plate by a snap-fit ​​method, thereby fixing the filter canister inside the air-holding cylinder. By setting a support plate at the bottom end of the sealing cover and rotatably installing multiple hooks on the support plate, the hooks can be snapped into the clamping plate on the outer surface of the isolation plate, thereby reliably fixing the filter canister inside the air-holding cylinder, preventing it from shifting during use, ensuring the stability of the filtration effect, and also facilitating disassembly and maintenance.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. During long-term operation of the device, natural gas impurities and absorbent will crystallize on the outer surface of the filter barrel, causing the filter holes to become clogged and the internal pressure to increase. The passive plug moves upward under pressure, allowing natural gas to be discharged through the pressure relief hole. At the same time, it drives the blades to be exposed and aligned with the water seepage hole. Natural gas forms bubbles and comes into full contact with the absorbent. The rising bubbles drive the blades to rotate, which in turn drives the eccentric block and the hammer to work, knocking the filter barrel and shaking off the surface crystals, thus achieving automatic cleaning and ensuring decarbonization efficiency and long-term stable operation of the device.

[0016] 2. This invention, by setting up a filter tank, allows natural gas to enter the interior from the bottom and then exit through a dense filter screen on the outer wall of the tank. When the natural gas passes through the filter screen, it is dispersed into fine and uniform bubbles. The bubbles fully contact the absorbent in the gas-holding cylinder and form a large-area interface, thereby significantly improving the gas-liquid mass transfer efficiency and ensuring the decarbonization and purification effect. At the same time, since the gas is released in the form of bubbles, it can effectively reduce the turbulence caused by direct gas discharge, reduce absorbent loss, and make the natural gas and absorbent more fully integrated.

[0017] 3. Even if some filter holes on the outer surface of the filter barrel are blocked due to crystal formation during long-term use, the natural gas can still be continuously dispersed and contacted with the absorbent through the water seepage holes on the outer surface of the limiting plate, thereby ensuring that the decarbonization reaction is not interrupted and effectively avoiding equipment shutdown or sudden drop in efficiency caused by crystal deposition. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the decarbonization unit;

[0019] Figure 2 This is a disassembly diagram of the decarbonization unit;

[0020] Figure 3 This is a schematic diagram of the internal structure of the reaction chamber;

[0021] Figure 4 This is a schematic diagram of the internal structure of the air-holding cylinder;

[0022] Figure 5 This is an internal disassembly diagram of the air-holding cylinder;

[0023] Figure 6 A structural diagram showing the positional relationship between the air-holding cylinder and the support cover;

[0024] Figure 7 This is a schematic diagram of the internal structure of the passive ring;

[0025] Figure 8 This is a cross-sectional view of the connecting cylinder and the transmission ring;

[0026] Figure 9 This is a cross-sectional view of the pressure relief cylinder;

[0027] Figure 10 This is a diagram showing the positional relationship between the sealing cover and the lifting plate;

[0028] Figure 11 This is a disassembled diagram of the inside of the sealing cap;

[0029] Figure 12 This is a schematic diagram of the internal structure of the isolation plate.

[0030] In the diagram: 1. Detachment tank; 2. Reaction chamber; 3. Outlet pipe; 4. Return pipe; 5. Drive motor; 6. Inlet pipe; 51. Turbofan; 61. Gas dissipation net;

[0031] 101. Air reservoir; 102. Sealing cap; 103. Limiting plate; 104. Traction line; 105. Center rod; 106. Support plate; 107. Push plate; 108. Hook; 109. Unlocking block;

[0032] 201. Support cover; 202. Passive ring; 203. Bottom cover; 204. Drive rod; 205. Striking hammer; 206. Blade; 207. Triangular block; 208. Drive ring; 209. Abutment ball; 210. Transmission ring; 211. Movable cylinder; 212. Eccentric block; 213. Filter barrel;

[0033] 301. Connecting cylinder; 302. Lifting plate; 303. Pressure relief cylinder; 304. Return spring; 305. Passive plug; 306. Isolation plate; 307. Spiral rod; 308. Locking ring; 309. Snap-fit ​​block. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Example 1: Please refer to Figures 1-4 A wellhead gas ambient temperature physical absorption decarbonization and recovery device includes a separation tank 1, a reaction box 2 fixedly installed at the center of the separation tank 1 by bolts, an outlet pipe 3 and an inlet pipe 6 fixedly connected to the top and bottom of the separation tank 1 respectively, and a return pipe 4 fixedly installed on the outer surface of the separation tank 1 by clamps. The separation tank 1 is filled with an absorbent for decarbonization (such as polyethylene glycol dimethyl ether, propylene carbonate, etc.) to dissolve CO2 and other impurities in natural gas. A drive motor 5 is fixedly installed at the bottom of the return pipe 4 by bolts, and a turbine fan 51 is fixedly connected to the output end of the drive motor 5. The turbine fan 51 is located inside the return pipe 4.

[0036] Multiple gas-holding cylinders 101 are fixedly installed inside the reaction chamber 2. Each gas-holding cylinder 101 has a filter barrel 213 inserted inside. A partition plate is fixedly installed at the inner end of the reaction chamber 2 to divide the reaction chamber 2 into upper and lower chambers. Multiple gas-holding cylinders 101 are fixedly connected to the partition plate. Multiple rectangular holes are opened on the outer surface of each gas-holding cylinder 101.

[0037] In this embodiment, the output end of the drive motor 5 drives the turbine fan 51 to rotate, and transports the absorbent inside the separation tank 1 to the chamber above the partition plate in the separation tank 1 through the return pipe 4. Then, the absorbent flows to the top of the partition plate and flows in through the rectangular hole on the outer surface of the gas cylinder 101. After passing through the filter barrel 213, it falls back into the lower chamber inside the separation tank 1.

[0038] A gas dispersion net 61 is fixedly installed inside the separation tank 1. The gas dispersion net 61 is connected to the output end of the gas inlet pipe 6. After natural gas enters through the gas inlet pipe 6, it passes through the gas dispersion net 61 to achieve dispersion and injection, and fully fills the chamber below the separation tank 1. The inlet of the return pipe 4 is located at the bottom of the separation tank 1 and is always immersed in the absorbent, which can prevent natural gas from directly entering the upper chamber through the return pipe 4.

[0039] To prevent excessive impurities in natural gas from causing the absorbent to crystallize on the outer surface of the filter barrel 213 during long-term use and affecting its normal operation, a support cover 201 is provided at the upper end of the filter barrel 213. A cleaning device is provided between the support cover 201 and the filter barrel 213 to remove impurities from the outer surface of the filter barrel 213.

[0040] A sealing cap 102 is fixedly installed at the upper end of the air-holding cylinder 101. A limiting plate 103 is fixedly installed at the bottom inner side of the air-holding cylinder 101. The outer surface of the limiting plate 103 has multiple water seepage holes arranged in a ring. Limiting rings are fixedly installed at both the upper and lower ends of the filter barrel 213. The limiting plate 103 is located between the two limiting rings, so that the movement of the filter barrel 213 is always constrained by the limiting plate 103. The bottom limiting ring has a different function from the upper limiting ring. The bottom limiting ring can completely block the water seepage holes of the limiting plate 103 in the default state, while the upper limiting ring does not have a sealing function.

[0041] Example 2: Please refer to Figures 5-7 A wellhead gas ambient temperature physical absorption decarbonization and recovery device, based on embodiment 1, the cleaning device includes a passive ring 202, which is rotatably installed at the bottom end of the support cover 201. Multiple blades 206 are provided on the outer surface of the passive ring 202, and the blades 206 are arranged in a ring. The filter barrel 213 moves downward until the passive ring 202 is above the limiting plate 103. At this time, the natural gas passes through the limiting plate 103 and passes through the blades 206. The blades 206 drive the passive ring 202 to rotate under the action of the natural gas flow.

[0042] In this embodiment, multiple blades 206 are arranged at an angle. Natural gas is first discharged through multiple water seepage holes distributed on the outer surface of the limiting plate 103. The water seepage holes can evenly disperse the natural gas. At the same time, absorbent flows continuously above the limiting plate 103. After passing through the water seepage holes, the natural gas is dispersed into a large number of tiny bubbles and fully contacts the absorbent. Subsequently, the bubbles pass through the blades 206 during their ascent. The buoyancy and flow disturbance generated by their ascent can drive the blades 206 to rotate.

[0043] like Figure 7 , Figure 8 , Figure 9 As shown, a bottom cover 203 is detachably installed on the upper end of the filter barrel 213 by bolts. The passive ring 202 is rotatably connected to the bottom cover 203. A transmission ring 210 is provided inside the bottom cover 203. A movable cylinder 211 is rotatably installed on the end of the bottom cover 203 away from the support cover 201, and the movable cylinder 211 is fixedly connected to the transmission ring 210. Two striking hammers 205 are sleeved on the outer surface of the movable cylinder 211. The striking hammers 205 are located inside the filter barrel 213. The transmission ring 210 is fixedly connected to the passive ring 202.

[0044] A drive rod 204 is fixedly connected to the end of the movable cylinder 211 away from the bottom cover 203. An eccentric block 212 is fixedly installed at the end of the drive rod 204 by bolts. When the drive rod 204 rotates, it drives the eccentric block 212 to rotate synchronously. The eccentric block 212 generates a periodic eccentric force during rotation, thereby driving the hammer 205 to reciprocate. Under the continuous vibration of the hammer 205, the filter barrel 213 is rhythmically struck, so that the impurities attached to the outer surface of the filter barrel 213 are effectively shaken off.

[0045] A connecting cylinder 301 is fixedly installed at the inner end of the support cover 201. A lifting plate 302 is provided inside the connecting cylinder 301. A driving ring 208 is provided inside the bottom cover 203. The lifting plate 302 is rotatably connected to the driving ring 208. The driving ring 208 is parallel to the blade 206. A triangular block 207 is fixedly welded to one end of the blade 206 near the driving ring 208. A plurality of abutting balls 209 are fixedly welded to the outer surface of the driving ring 208. The abutting balls 209 are in contact with the inclined surface of the triangular block 207.

[0046] Specifically, a sliding groove is provided on the inclined surface of the triangular block 207, and the abutment ball 209 passes through the groove. When the drive ring 208 moves upward, it first drives the abutment ball 209 to move along the sliding groove, and then, through the interaction between the abutment ball 209 and the inclined surface, it pushes the blade 206 to move away from the drive ring 208.

[0047] Example 3: Please refer to Figure 5 , Figure 9 , Figure 10 , Figure 11A wellhead gas ambient temperature physical absorption decarbonization and recovery device, based on embodiments 1 and 2, is provided with a pressure relief cylinder 303 below the support cover 201. The outer surface of the pressure relief cylinder 303 has multiple vent holes. A passive plug 305 is inserted inside the pressure relief cylinder 303. A sealing ring is fitted on the outer surface of the passive plug 305 and fits against the inner wall of the pressure relief cylinder 303 to increase the sealing performance. The passive plug 305 and the pressure relief cylinder 303 are connected by a return spring 304. An isolation plate 306 (not shown in the figure) is fixedly installed inside the pressure relief cylinder 303. The pressure relief cylinder 303 is rotatably connected to the movable cylinder 211.

[0048] The passive plug 305 moves upward under pressure. Once it passes the pressure relief hole, the high-pressure natural gas in the pressure relief cylinder 303 is discharged. Two traction lines 104 are fixedly connected to the outer surface of the sealing cover 102. The ends of the traction lines 104 are fixedly connected to the lifting plate 302. A rectangular block is fixedly installed on the outer surface of the support cover 201. A rectangular groove is opened at the inner end of the gas storage cylinder 101. The rectangular block is located in the rectangular groove to prevent the support cover 201 from rotating during downward movement.

[0049] In this embodiment, when the lifting plate 302 moves down, the traction line 104 is first gradually made vertical and eventually taut. Then, the filter bucket 213 and other components continue to move down, while the lifting plate 302 cannot continue to move due to the restriction of the taut traction line 104.

[0050] A support plate 106 is fixedly installed at the bottom of the sealing cover 102. Multiple hooks 108 are rotatably installed on the outer surface of the support plate 106 via a rotating shaft. A clamping plate is fixedly installed at the upper end of the isolation plate 306, and the hooks 108 are connected to the clamping plate on the outer surface of the isolation plate 306 by a snap-fit ​​method, so as to fix the filter canister 213 inside the air-holding cylinder 101.

[0051] In this embodiment, a central rod 105 is inserted through the inside of the support plate 106, and a push plate 107 is fixedly installed on the outer surface of the central rod 105. The push plate 107 is located below the support plate 106, and an unlocking block 109 is fixedly installed on the close ends of the hooks 108. The unlocking block 109 is triangular, and the edge of the push plate 107 contacts the triangular inclined surface of the unlocking block 109. So, as the push plate 107 moves upward, the hooks 108 rotate in a direction away from each other under the drive of the triangular surface.

[0052] like Figure 9 , Figure 11 , Figure 12As shown, a spiral rod 307 is fixedly connected to the upper end of the passive plug 305. A locking ring 308 is sleeved inside the isolation plate 306, and two locking blocks 309 are rotatably installed on the outer surface of the locking ring 308 via a rotating shaft. Specifically, the locking blocks 309 and the locking ring 308 are locked together by a torsion spring. When the spiral rod 307 moves upward and passes through the inside of the locking ring 308, it pushes the locking blocks 309 open. Then, under the action of the torsion spring, the locking blocks 309 are locked in the spiral groove on the outer surface of the spiral rod 307, thereby limiting the passive plug 305. It is worth noting that after the spiral rod 307 is completely inserted into the inside of the locking ring 308, the passive plug 305 passes through the pressure relief hole on the outer surface of the pressure relief cylinder 303, and the spiral rod 307 corresponds to the center rod 105.

[0053] It is worth noting that a push rod (not shown in the figure) is fixedly installed at the bottom of the sealing cover 102. When the filter barrel 213 returns to its initial state, the push rod pushes the lifting plate 302 to its initial position.

[0054] The working principle of this invention is:

[0055] When in use, natural gas is injected into the interior of the separation tank 1 through the inlet pipe 6 via the booster device. Then, the output end of the drive motor 5 drives the turbine fan 51 to rotate, so that the absorbent is in a flowing state. Then, the absorbent flows in through the rectangular hole on the outer surface of the gas storage cylinder 101, passes through the filter barrel 213, and falls back into the lower chamber inside the separation tank 1.

[0056] At the same time, natural gas first enters the interior through the bottom of the filter barrel 213, then penetrates the dense filter screen on the outer wall of the barrel, and finally emerges in the form of fine bubbles, which fully contact the absorbent in the gas-holding cylinder 101, thereby achieving full fusion and purification. After purification, the natural gas will flow out from the gas outlet pipe 3.

[0057] With long-term use of the device, impurities in the natural gas react with the absorbent and gradually crystallize on the outer surface of the filter barrel 213. When the filter holes on the outer surface of the filter barrel 213 are completely covered, the pressure inside the filter barrel 213 increases. At this time, the passive plug 305 moves upward under the pressure. During the upward movement, it compresses the return spring 304 until the spiral rod 307 passes through the inside of the locking ring 308 and contacts the outer surface of the center rod 105. As the passive plug 305 continues to move upward, it pushes the center rod 105 to move upward. Under the action of the push plate 107 and the unlocking block 109, the hook 108 rotates in a direction away from each other.

[0058] At this time, the hook 108 is no longer engaged with the plate on the outer surface of the isolation plate 306. Natural gas flows out from the vent hole on the outer surface of the pressure relief cylinder 303. At this time, the filter barrel 213 moves downward under the action of gravity, first making the traction line 104 gradually vertical and finally taut. Then, the filter barrel 213 and other components continue to move downward, while the lifting plate 302 cannot continue to move due to the restriction of the taut traction line 104. This causes the drive ring 208 to push the triangular block 207 to move away from the drive ring 208 through the abutment ball 209, so that the blade 206 is exposed outside the passive ring 202.

[0059] At this time, the blade 206 corresponds to the water seepage hole on the outer surface of the limiting plate 103. Then, after the natural gas passes through the water seepage hole, it is dispersed into a large number of fine bubbles and fully contacts the absorbent. Then, the bubbles pass through the blade 206 during the rising process. The buoyancy and flow disturbance generated by their rising can drive the blade 206 to rotate. Then, during the rotation of the blade 206, it rotates through the transmission ring 210 and the movable cylinder 211. At this time, the drive rod 204 drives the eccentric block 212 to rotate. The eccentric block 212 generates periodic eccentric force during the rotation, thereby driving the hammer 205 to generate reciprocating vibration. Under the continuous vibration of the hammer 205, the filter barrel 213 is rhythmically struck, so that the impurities attached to the outer surface of the filter barrel 213 are effectively shaken off.

[0060] Meanwhile, the vibration of the filter barrel 213 is transmitted to the locking ring 308. As the passive plug 305 is continuously pushed by the return spring 304 and the locking block 309 is locked in the spiral groove of the spiral rod 307, the locking ring 308 rotates during the vibration, driving the spiral rod 307 to move slowly downward until the spiral rod 307 is completely disengaged from the inside of the locking ring 308. At this time, the passive plug 305 is reset under the elastic force of the return spring 304. However, at this time, the impurities on the outer surface of the filter barrel 213 have been cleaned during the vibration.

[0061] Since the pressure relief holes on the outer surface of the pressure relief cylinder 303 can no longer allow natural gas to flow, the natural gas can only flow through the filter holes on the outer surface of the filter barrel 213. Due to the small filter hole diameter, the resistance to the flow of natural gas increases. At this time, the filter barrel 213 moves upward under the pressure. At this time, the hook 108 reconnects with the clamping plate at the upper end of the isolation plate 306. At this time, the natural gas comes into physical contact with the absorbent after passing through the filter barrel 213 again.

[0062] This completes one self-cleaning process for the crystallized impurities on the outer surface of the filter barrel 213.

[0063] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A wellhead gas ambient temperature physical absorption decarbonization and recovery device, comprising a separation tank (1), characterized in that: A reaction chamber (2) is fixedly installed at the center of the separation tank (1). An outlet pipe (3) and an inlet pipe (6) are fixedly connected to the top and bottom of the separation tank (1), respectively. A return pipe (4) is fixedly installed on the outer surface of the separation tank (1). A drive motor (5) is fixedly installed at the bottom of the return pipe (4), and a turbofan (51) is fixedly connected to the output end of the drive motor (5). The turbofan (51) is located inside the return pipe (4). Multiple gas-holding cylinders (101) are fixedly installed inside the reaction chamber (2). Each of the gas-holding cylinders (101) is equipped with a filter barrel (213). The inner end of the reaction chamber (2) is fixedly installed with a partition plate to divide the reaction chamber (2) into upper and lower chambers. Multiple gas-holding cylinders (101) are fixedly connected to the partition plate. Multiple rectangular holes are opened on the outer surface of each gas-holding cylinder (101). The upper end of the filter barrel (213) is provided with a support cover (201). A cleaning device is provided between the support cover (201) and the filter barrel (213) to remove impurities from the outer surface of the filter barrel (213).

2. The wellhead gas ambient temperature physical absorption decarbonization and recovery device according to claim 1, characterized in that: A sealing cap (102) is fixedly installed at the upper end of the air-holding cylinder (101). A limiting plate (103) is fixedly installed at the bottom inner side of the air-holding cylinder (101). The outer surface of the limiting plate (103) is provided with multiple water seepage holes arranged in a ring. Both the upper and lower ends of the filter bucket (213) are fixedly installed with limiting rings. The limiting plate (103) is located between two limiting rings. A connecting cylinder (301) is fixedly installed at the inner end of the support cover (201). A lifting plate (302) is provided inside the connecting cylinder (301).

3. The wellhead gas ambient temperature physical absorption decarbonization and recovery device according to claim 2, characterized in that: The cleaning device includes a passive ring (202), which is rotatably mounted on the bottom end of the support cover (201). Multiple blades (206) are provided on the outer surface of the passive ring (202), and the blades (206) are arranged in a ring. When the filter barrel (213) moves down and the passive ring (202) is located above the limiting plate (103), the natural gas passes through the limiting plate (103) and passes through the blades (206). Under the action of the natural gas flow, the blades (206) drive the passive ring (202) to rotate.

4. The wellhead gas ambient temperature physical absorption decarbonization and recovery device according to claim 3, characterized in that: The filter barrel (213) is detachably fitted with a bottom cover (203). The passive ring (202) is rotatably connected to the bottom cover (203). The bottom cover (203) is provided with a transmission ring (210). The bottom cover (203) is rotatably fitted with a movable cylinder (211) at the end away from the support cover (201). The movable cylinder (211) is fixedly connected to the transmission ring (210). Two striking hammers (205) are fitted on the outer surface of the movable cylinder (211). The striking hammers (205) are located inside the filter barrel (213). The transmission ring (210) is fixedly connected to the passive ring (202).

5. The wellhead gas ambient temperature physical absorption decarbonization and recovery device according to claim 4, characterized in that: The end of the movable cylinder (211) away from the bottom cover (203) is fixedly connected to a drive rod (204). An eccentric block (212) is fixedly installed at the end of the drive rod (204). When the drive rod (204) rotates, it drives the eccentric block (212) to rotate synchronously. The eccentric block (212) generates a periodic eccentric force during the rotation, thereby driving the hammer (205) to generate reciprocating vibration.

6. The wellhead gas ambient temperature physical absorption decarbonization and recovery device according to claim 5, characterized in that: The bottom cover (203) is provided with a drive ring (208) inside. The lifting plate (302) is rotatably connected to the drive ring (208). Each blade (206) is fixedly connected to a triangular block (207) at one end near the drive ring (208). Multiple abutment balls (209) are fixedly installed on the outer surface of the drive ring (208). The abutment balls (209) are in contact with the inclined surface of the triangular block (207).

7. The wellhead gas ambient temperature physical absorption decarbonization and recovery device according to claim 4, characterized in that: The pressure relief cylinder (303) is provided below the support cover (201). The outer surface of the pressure relief cylinder (303) is provided with multiple vent holes, and a passive plug (305) is provided inside the pressure relief cylinder (303).

8. The wellhead gas ambient temperature physical absorption decarbonization and recovery device according to claim 7, characterized in that: The passive plug (305) is connected to the pressure relief cylinder (303) by a return spring (304). An isolation plate (306) is fixedly installed inside the pressure relief cylinder (303). The passive plug (305) moves upward under pressure. Once it passes the vent hole on the outer surface of the pressure relief cylinder (303), the high-pressure natural gas in the pressure relief cylinder (303) flows out through the hole. Two traction lines (104) are fixedly connected to the outer surface of the sealing cover (102). The ends of the traction lines (104) are fixedly connected to the lifting plate (302).

9. The wellhead gas ambient temperature physical absorption decarbonization and recovery device according to claim 8, characterized in that: A support plate (106) is fixedly installed at the bottom of the sealing cover (102). Multiple hooks (108) are rotatably installed on the outer surface of the support plate (106). A clamping plate is fixedly installed at the upper end of the isolation plate (306). The hooks (108) are connected to the clamping plate on the outer surface of the isolation plate (306) by a snap-fit ​​method, thereby fixing the filter bucket (213) inside the air-holding cylinder (101).

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