A natural gas deacidification device

Abstract

The application discloses a natural gas deacidification device, which comprises a gas-liquid mixing mechanism, a closed loop pipe, a porous adsorption belt body, a flexible filter and a torsion mechanism. The application controls the amount of natural gas to be deacidified and the amount of desulfurizer liquid to diffuse and implement deacidification chemical reaction in the small gap between the sheet and the lower layer plate in mutual contact, improves the sufficiency of the chemical reaction of the desulfurizer liquid and the natural gas containing sulfur components, and greatly reduces the residual amount of excessive use of the liquid for deacidification. The four inner supporting rods driven in the torsion state can twist the connected flexible filter and the filler, which can not only accelerate the transition of the attached matters in the flexible filter and the filler from hardening to loose falling, but also provide convenience for subsequent flushing and cleaning, and ensure the smoothness of the gas permeation filtration of the flexible filter and the filler. The porous adsorption belt body can be moved and adjusted in position, and the secondary reaction deposition attached matters can be cleaned, which is beneficial to the recovery to the state of the corrosion-resistant sponge adsorbing the surrounding liquid again.

Description

Technical Field

[0001] This invention relates to the field of natural gas processing technology, and more particularly to a natural gas deacidification device. Background Technology

[0002] Natural gas contains hydrogen sulfide, mercaptans, heavy hydrocarbons, saturated water, and other impurities. Hydrogen sulfide in natural gas reacts with water to form a weak acid, which can cause corrosion of steel equipment and pipelines. Furthermore, if natural gas containing hydrogen sulfide is used as domestic fuel, the exhaust gases produced after combustion will contain sulfides, which will pollute the environment and harm human health. Therefore, it is necessary to remove hydrogen sulfide from extracted natural gas to meet the requirements for industrial production and domestic commercial gas use.

[0003] Currently, CN117264677B describes a skid-mounted natural gas desulfurization device, comprising an absorption unit, a filtration and aeration unit, and a storage unit. The absorption unit includes an absorber, inside which, from bottom to top, are arranged a gas distributor, a packing support plate, packing, and a demister. The top of the absorber has a purified natural gas outlet, and one side has a natural gas inlet. A gas-to-air connection pipe is located on one side of the absorber, with a degasser at one end. A liquid-to-air connection pipe connects the absorber and the degasser. A level gauge is located on one side of the degasser, and a liquid outlet pipe is located at the bottom of the degasser. Both the absorbent liquid and natural gas enter the absorber from the bottom. The filter backwash uses "air + absorbent liquid" as the medium. The color of the liquid flowing out through the liquid outlet pipe provides a clear indication of whether the absorbent liquid is functioning correctly. The skid-mounted design reduces equipment requirements, lowers investment costs, and facilitates control and maintenance.

[0004] However, during the actual desulfurization process of the aforementioned skid-mounted natural gas desulfurization device, we found the following shortcomings: 1. While the packing material and the quartz sand particles in the filter can pass through the reaction liquid, there is also the problem of accumulated impurities, hardening, limited penetration into the flushing gaps, and difficulty in loosening and breaking them, leading to difficult and incomplete backwashing; 2. Although the packing material prevents natural gas bubbles from accumulating and growing in the absorbent liquid and increases the gas-liquid contact area, excessive absorbent liquid will mix into the post-reaction liquid, increasing the complexity of subsequent processing; 3. The natural gas overflowing from the liquid immediately after desulfurization still contains impurities, and the purification effect of natural gas cannot be improved solely by relying on the packing material placed in the absorbent liquid. Therefore, a natural gas desulfurization device is proposed to address the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a natural gas deacidification device to solve the above-mentioned problems.

[0006] The present invention achieves the above-mentioned objective through the following technical solution: a natural gas deacidification device, comprising a gas-liquid mixing mechanism, a porous adsorption belt placed inside a closed-loop tube, a flexible filter element, and a central partition plate integrated with the closed-loop tube. The gas-liquid mixing mechanism is disposed in the lower space of the bottom box, and a cover plate is sealed and installed at the opening of the bottom box. A torsion mechanism is disposed inside the flexible filter element, and the bottom of the flexible filter element is sealed and connected to the middle part of the cover plate. Multiple closed-loop tube sections distributed on the central partition plate are interconnected with the upper and lower spaces of the bottom box through upper slots. A section of the porous adsorption belt is exposed at the upper slot, and the lower slot located on the closed-loop tube is disposed inside the liquid holding tank. The sheet surface in the gas-liquid mixing mechanism is provided with concave and convex caps, and a second orifice is opened at the surface between the concave and convex caps. A ring is installed at each second orifice. The top of each concave and convex cap moves upward to abut against the corresponding first orifice. A check pipe is covered inside the concave and convex cap. The lower surface of the sheet contacts the upper surface of the lower plate, and a liquid distribution pipe is provided between the sheet and the lower plate.

[0007] In a further technical solution, the gas-liquid mixing mechanism also includes an upper plate, on the surface of which a set of the first orifices are distributed. The edges of the upper plate, the sheet material, and the lower plate are fixed from top to bottom to the surrounding walls of the lower space inside the bottom box. Each orifice on the lower plate is connected to and installed with a check pipe. A gap is left between the upper plate and the central partition located in the middle of the bottom box. A gas inlet pipe is connected to the bottom of the bottom box, and a first flow control valve is installed on the gas inlet pipe. One end of the liquid distribution outlet pipe is connected to and installed with a liquid inlet pipe, and a second flow control valve is installed on the liquid inlet pipe.

[0008] A further technical solution is that the diameter of the first orifice is larger than the diameter of the second orifice, and the first orifice and the second orifice are staggered. The diameter of the second orifice is 0.5mm-1mm, and the second orifice is connected to the corresponding part of the upper surface of the lower plate by means of a ring and the water pressure above.

[0009] A further technical solution is that the porous adsorption belt includes multiple sections of corrosion-resistant sponge, pistons and base belt. The multiple sections of corrosion-resistant sponge are distributed on the base belt. A piston is provided at the end of two adjacent sections of corrosion-resistant sponge, and the middle of the piston is fixedly connected to the base belt. The cross-section of the base belt is not limited to a square structure, and a set of magnetic suction components are distributed inside the surrounding sidewalls of the base belt.

[0010] In a further technical solution, the magnetic attractor is attracted by an electromagnet assembly located in the area below another part of the plurality of closed-loop tubes, and the electromagnet assembly is mounted on a carrier plate. Guide rails are slidably mounted on both sides of the bottom of the carrier plate, and the two guide rails are mounted on the same carrier plate. The push-pull moving module located on the carrier plate is connected to the middle of the bottom of the carrier plate. The push-pull moving module is not limited to a servo linear motor. The electromagnet assembly is electrically connected to an external controller through wires.

[0011] A further technical solution includes an inner support rod, a first ball head, a ring, a second ball head, and an end cap. One side of each inner support rod contacts the inner surface of the flexible filter element, and the upper and lower ends of the inner support rod are respectively connected to the first ball head and the ring. Each first ball head is movably connected to the ball groove structure corresponding to the bottom of the end cap. Each ring is movably connected to the second ball head located in the middle area of ​​the cover plate. The middle part of the end cap is rotatably connected to the top middle position of the upper box through a bearing. A gear is meshed with the arc tooth block located at the edge of the end cap, and the gear is installed on the shaft end of the motor. The bottom of the carrier connected to the motor is fixedly installed on one side of the top of the upper box.

[0012] In a further technical solution, the middle part of the end cap is rotatably connected to the corresponding part on one side of the purified gas outlet pipe through a sealed bearing, and one end of the purified gas outlet pipe extends into the interior of the flexible filter element. The end cap, the cover plate, the flexible filter element, and the inner support rods (not limited to groups of four) together form a filling space. The edge of the cover plate is sealed to the opening of the upper box, and a liquid outlet pipe is provided on the surface of the upper box. A set of round holes are distributed on the surface of the cover plate.

[0013] In a further technical solution, two ultrasonic cleaning modules are arranged vertically in one side of the space inside the liquid container, and the two ultrasonic cleaning modules clean the porous adsorption belt exposed at the lower hole, and a discharge pipe is connected to one side of the bottom of the liquid container surface.

[0014] In a further technical solution, the liquid injected into the liquid container and the liquid flowing out of the liquid distribution pipe are two different liquids.

[0015] In a further technical solution, the concave-convex cap is not limited to a single hard material, and the concave-convex cap is cone-shaped.

[0016] The beneficial effects of this invention are: This invention controls the flow of natural gas to be deacidified into a set of distributed check pipes, which then enter the concave-convex cap and gradually diffuse into the tiny gaps between the contacting sheets and the lower plate. Simultaneously, the deacidifying liquid enters through a liquid inlet pipe and a liquid distribution outlet pipe, also diffused into the tiny gaps between the contacting sheets and the lower plate. This achieves the effect of chemically reacting the deacidifying liquid with the sulfur-containing components in the natural gas, improving the sufficiency of the chemical reaction between the deacidifying liquid and the sulfur-containing components in the natural gas, and significantly reducing the residual amount of deacidifying liquid due to overuse.

[0017] This invention utilizes a high-frequency, controlled input of natural gas to be deacidified and liquid for deacidification, combined with the tiny gap between the sheet and the lower plate. After each deacidification chemical reaction, the second orifice is reattached to the surface of the lower plate under the pressure of the water above and the action of the ring. This not only effectively displaces a large amount of the liquid and gas from the deacidification reaction between the lower plate and the sheet, but also quickly restores the sheet to a state of contact with the surface of the lower plate.

[0018] This invention utilizes the four internal support rods that are in a torsional state to cause the flexible filter element to twist and deform, while also twisting the packing. This not only accelerates the process of loosening and detaching the deposits in the flexible filter element and packing, but also facilitates subsequent rinsing and cleaning, ensuring the smooth air permeability and filtration of the flexible filter element and packing.

[0019] This invention uses a porous adsorption belt to adsorb a liquid in a liquid container in each segment of corrosion-resistant sponge. The liquid is moved to the upper hole and combined with the deacidified liquid and natural gas passing through the segment of corrosion-resistant sponge. This allows the sulfides in the deacidified liquid to react with the liquid in the segment of corrosion-resistant sponge to form a secondary reaction precipitate, which is then attached to the segment of corrosion-resistant sponge.

[0020] This invention moves a section of corrosion-resistant sponge containing secondary reaction precipitates with sulfide ions to an exposed position at the lower opening, between two ultrasonic cleaning modules distributed vertically. This allows the sponge to more fully immerse itself in a liquid within a liquid container, eliminating any residual deacidified liquid carried by the sponge. Ultrasonic waves then clean and remove the attached secondary reaction precipitates from the sponge, collecting them at the bottom of the liquid container and restoring the sponge's ability to reabsorb the surrounding liquid. Attached Figure Description

[0021] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is an exploded view of the gas-liquid mixing mechanism structure of the present invention.

[0022] Figure 3 for Figure 2 Schematic diagram of the sheet material structure.

[0023] Figure 4 This is a partial structural schematic diagram of the porous adsorption band of the present invention.

[0024] Figure 5 This is a partial structural diagram of the entire invention.

[0025] Figure 6 This is a schematic diagram of the connection structure of the torsion mechanism of the present invention.

[0026] Figure 7 for Figure 6 Schematic diagram of the inner strut structure.

[0027] Figure 8 This is a schematic diagram of the connection structure between the closed-loop pipe, the bottom box, and the liquid container of the present invention.

[0028] Figure 9 This is a schematic diagram of the connection structure between the closed-loop pipe and the bottom box of the present invention.

[0029] Figure 10 for Figure 8 Side view of the connecting structure.

[0030] In the diagram: 1. Gas-liquid mixing mechanism; 110. Upper plate; 111. First orifice; 120. Sheet; 121. Concave-convex cap; 122. Second orifice; 123. Ring; 130. Lower plate; 131. Check valve; 2. Closed-loop pipe; 210. Upper slot; 220. Lower slot; 3. Porous adsorption belt; 310. Corrosion-resistant sponge; 320. Piston; 330. Base belt; 331. Magnetic suction element; 4. Bottom box; 410. Middle partition; 420. Cover plate; 421. Circular hole; 5. Flexible filter element; 510. Internal support rod; 51 1. First ball head; 512. Ring; 513. Second ball head; 6. End cap; 610. Arc tooth block; 7. Gear; 710. Motor; 8. Gas inlet pipe; 810. First flow control valve; 9. Liquid inlet pipe; 910. Second flow control valve; 920. Liquid distribution outlet pipe; 10. Upper housing; 11. Liquid container; 1110. Discharge pipe; 12. Purified gas outlet pipe; 13. Liquid outlet pipe; 14. Push-pull moving module; 15. Electromagnet assembly; 16. Carrier plate; 17. Bearing plate; 18. Ultrasonic cleaning module. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0032] refer to Figure 1-10 As shown, a natural gas deacidification device includes a gas-liquid mixing mechanism 1, a porous adsorption belt 3 placed inside a closed-loop pipe 2, a flexible filter element 5, and a central partition 410 integrated with the closed-loop pipe 2. The gas-liquid mixing mechanism 1 is located in the lower space inside the bottom box 4, and a cover plate 420 is sealed and installed at the opening of the bottom box 4. The flexible filter element 5 is provided with a torsion mechanism inside, and the bottom of the flexible filter element 5 is sealed and connected to the middle part of the cover plate 420. Multiple closed-loop pipe 2 sections distributed on the central partition 410 are interconnected with the upper and lower spaces of the bottom box 4 through upper strip holes 210. A section of the porous adsorption belt 3 is exposed at the upper strip hole 210, and the lower strip hole 220 located on the closed-loop pipe 2 is located inside the liquid holding tank 11. Middle partition 410: used to divide the bottom box 4 into two parts from the middle, and the space below it can be used to install the gas-liquid mixing mechanism 1; secondly, the middle partition 410 can fill and seal the gap between multiple closed-loop pipes 2 to ensure that liquid can only pass through the upper hole 210. Flexible filter element 5: It forms a packing space with the inner support rod 510, end cap 6 and cover plate 410 in the torsion mechanism, and the packing in the packing space performs end purification of natural gas after acid removal; Torsion mechanism: See Figure 5 , Figure 6 and Figure 7 As shown, by utilizing the four internal support rods 510 that are driven to be in a torsional state, the flexible filter element 5 can be torsionally deformed, and the packing can also be twisted. This can not only accelerate the transformation of the deposits in the flexible filter element 5 and the packing from caking to loosening and falling off, but also provide convenience for subsequent rinsing and cleaning, and ensure the smooth air permeability and filtration of the flexible filter element 5 and the packing. Upper hole 210: used to expose a section of corrosion-resistant sponge 310 on the moving porous adsorption belt 3, and the section of corrosion-resistant sponge 310 is placed in the space above and below the middle partition 410; Porous adsorption band 3: Combination Figure 4 As shown, each segment of corrosion-resistant sponge 310 located on the porous adsorption belt 3 adsorbs a liquid located in the liquid container 11 and moves it to the upper hole 210. Combined with the deacidified liquid and natural gas passing through the segment of corrosion-resistant sponge 310, the sulfides in the deacidified liquid can react with the liquid in the segment of corrosion-resistant sponge 310 to form a secondary reaction precipitate, and the secondary reaction precipitate is attached to the segment of corrosion-resistant sponge 310. The section of corrosion-resistant sponge 310, with secondary reaction precipitates containing sulfide ions attached, is exposed at the lower slot 220 by movement, and is simultaneously positioned between two ultrasonic cleaning modules 18 distributed vertically. Figure 10 As shown, the effects are as follows: Firstly, the corrosion-resistant sponge 310 can more fully enter a liquid in the liquid container 11, eliminating the residue of deacidified liquid carried by the corrosion-resistant sponge 310. Secondly, by using ultrasound, the attached secondary reaction precipitates are cleaned and removed from the corrosion-resistant sponge 310 and collected at the bottom of the liquid container 11, which can restore the corrosion-resistant sponge 310 to the state of re-adsorption of the surrounding liquid.

[0033] See Figure 1 , Figure 2 , Figure 3 As shown, the sheet 120 in the gas-liquid mixing mechanism 1 is provided with concave-convex caps 121 distributed on its surface, and a second orifice 122 is opened on the surface between the concave-convex caps 121. A ring 123 is installed at each second orifice 122. The top of each concave-convex cap 121 moves upward to abut against the corresponding first orifice 111. A check pipe 131 is covered inside the concave-convex cap 121. The lower surface of the sheet 120 contacts the upper surface of the lower plate 130. A liquid distribution outlet pipe 920 is provided between the sheet 120 and the lower plate 130. The concave-convex caps 121 are not limited to a rigid material and are conical in shape. The gas-liquid mixing mechanism 1 also includes an upper plate 110. A set of first orifices 111 are distributed on the surface of the upper plate 110. The edges of the upper plate 110, the sheet 120, and the lower plate 130 are installed and fixed from top to bottom on the surrounding walls of the lower space inside the bottom box 4. Each orifice on the lower plate 130 is connected to and installed with a check pipe 131. There is a gap between the upper plate 110 and the central partition 410 located in the middle of the bottom box 4. A gas inlet pipe 8 is connected to and installed at the bottom of the bottom box 4, and a first flow control valve 810 is provided on the gas inlet pipe 8. One end of the liquid separation output pipe 920 is connected to and installed with a liquid inlet pipe 9, and a second flow control valve 910 is provided on the liquid inlet pipe 9. Under the action of the first flow control valve 810, the second flow control valve 910 and their external control equipment, the natural gas to be deacidified is controlled to enter the concave-convex cap 121 through a set of distributed check pipes 131 and gradually diffuses in the tiny gap between the contacting sheet 120 and the lower plate 130. At the same time, the liquid used for deacidification is controlled to enter the tiny gap between the contacting sheet 120 and the lower plate 130 through the liquid inlet pipe 9 and the liquid outlet pipe 920, thus achieving the effect of chemical reaction and deacidification of the liquid used for deacidification with the sulfur-containing components in the natural gas. This improves the sufficiency of the chemical reaction between the liquid used for deacidification and the sulfur-containing components in the natural gas, and can greatly reduce the residual amount of liquid used for deacidification that has been overused. When the deacidified natural gas enters the concave-convex cap 121 and pushes the gas in the cap 121 upward, the top of the cap 121 will first momentarily block and then separate the corresponding first orifice 111. The effects achieved are as follows: Firstly, it can greatly reduce the amount of liquid containing a small amount of deacidifying substances discharged from the first orifice 111 between the upper plate 110 and the sheet 120. Second point: The second orifice 122 is in an upward-moving and separated state from the surface of the lower plate 130 at the instant of the reaction between the natural gas to be deacidified and the liquid used for deacidification, so that the reacted liquid and natural gas can enter the space between the upper plate 110 and the sheet 120 through the second orifice 122, until they flow and diffuse upward from the first orifice 111. Thirdly: Under the high-frequency controlled input of natural gas to be deacidified and liquid used for deacidification, and combined with the tiny gap between sheet 120 and lower plate 130, after each deacidification chemical reaction is completed, the second orifice 122 is attached to the surface of lower plate 130 again under the action of water pressure above and ring 421. This can not only squeeze out a large amount of liquid and gas after the deacidification reaction between lower plate 130 and sheet 120, but also quickly reset sheet 120 to a state of contact with the surface of lower plate 130. Among them, the sheet 120 is not limited to corrosion-resistant elastic plastic material; the liquid output pipe 920 is initially flattened and blocked, and when the sheet 120 is pushed open slightly by the natural gas pressure, it instantly returns to its original shape and is in the state of outputting liquid for deacidification.

[0034] like Figure 2 As shown, the diameter of the first orifice 111 is larger than the diameter of the second orifice 122, and the first orifice 111 and the second orifice 122 are staggered. The diameter of the second orifice 122 is 0.5mm-1mm, and the second orifice 122 is in contact with the corresponding part of the upper surface of the lower plate 130 through the ring 123 and the water pressure above.

[0035] See Figure 4As shown, the porous adsorption belt 3 includes multiple sections of corrosion-resistant sponge 310, piston 320 and base belt 330. The multiple sections of corrosion-resistant sponge 310 are distributed on the base belt 330. A piston 320 is provided at the end of two adjacent sections of corrosion-resistant sponge 310, and the middle part of the piston 320 is fixedly connected to the base belt 330. Piston 320: The annular surface of piston 320 slides and seals against the inner wall of closed-loop pipe 2 to prevent the reaction liquid from flowing into liquid container 11, while ensuring the independence of the space between the multiple sections of corrosion-resistant sponge 310. Baseband 330: As a subsequent moving carrier, it is convenient to place the corresponding section of corrosion-resistant sponge 310 at the upper strip hole 210 and the lower strip hole 220 by moving the baseband 330; Among them, corrosion-resistant sponge 310 is a sponge material that has undergone chemical modification or special process treatment. While maintaining its porous adsorption characteristics, it also has acid and alkali resistance and corrosion resistance, and can be used for adsorption treatment of acid and alkali reaction liquids during deacidification process.

[0036] Combined Figure 3 , Figure 5 , Figure 8 and Figure 9 As shown, the cross-section of the baseband 330 is not limited to a square structure, and a set of magnetic attracting components 331 are distributed inside the surrounding sidewalls of the baseband 330. The magnetic attracting components 331 are magnetically attracted by the electromagnet assembly 15 located in the area below another part of the plurality of closed-loop tubes 2. The electromagnet assembly 15 is mounted on the carrier plate 16. Guide rails are slidably mounted on both sides of the bottom of the carrier plate 16, and the two guide rails are mounted on the same carrier plate 17. The push-pull moving module 14 located on the carrier plate 17 is connected to the middle of the bottom of the carrier plate 16. The push-pull moving module 14 is not limited to a servo linear motor. The electromagnet assembly 15 is electrically connected to an external controller through wires. When the porous adsorption belt 3 needs to be moved, the push-pull moving module 14 drives the connected carrier plate 16 to move back and forth along the guide rail. At the same time, the electromagnet assembly 15 on the carrier plate 16 is in a de-energized state during the return process. Thus, the movement of the electromagnet assembly 15, which generates a magnetic field when energized, can drive the magnetically connected magnetic suction piece 331 and base belt 330 to move, thereby completing the positional movement and replacement of the multiple sections of corrosion-resistant sponge 310 on the porous adsorption belt 3.

[0037] See Figure 5 , Figure 6 and Figure 7As shown, the torsion mechanism includes an inner support rod 510, a first ball head 511, a ring 512, a second ball head 513, and an end cap 6. One side of each inner support rod 510 contacts the inner surface of the flexible filter element 5, and the upper and lower ends of the inner support rod 510 are respectively connected to the first ball head 511 and the ring 512. Each first ball head 511 is movably connected to the ball groove structure corresponding to the bottom of the end cap 6. Each ring 512 is movably connected to the second ball head 513 located in the middle area of ​​the cover plate 420. The middle part of the end cap 6 is rotatably connected to the top middle position of the upper box 10 through a bearing. The arc tooth block 610 located at the edge of the end cap 6 is meshed with a gear 7, and the gear 7 is installed on the shaft end of the motor 710. The bottom of the carrier connected to the motor 710 is fixedly installed on one side of the top of the upper box 10. The specific operating principle of the torsion mechanism: Under the action of the controller, the motor 710 drives the connected gear 7 to rotate back and forth, so that the arc tooth block 610 meshing with the gear 7 and the end cover 6 connected to the arc tooth block 610 are in the original position and rotate back and forth. This further drives all the movable inner support rods 510 to be in a torsional state. By using the four inner support rods 510 that are driven to be in a torsional state, the flexible filter element 5 can be torsionally deformed, and the packing can also be torsionally moved. This can accelerate the transformation of the attached substances in the flexible filter element 5 and the packing from caking to loosening and falling off, and also provide convenience for subsequent rinsing and cleaning, ensuring the smooth air permeability and filtration of the flexible filter element 5 and the packing. Ring 512: Used to be movably connected to the second ball head 513, and can be displaced and moved on the second ball head 513 to provide an upward displacement for the torsional movement of the bottom end of the inner strut 510, ensuring the feasibility of effective torsion of the inner strut 510.

[0038] like Figure 5 As shown, the middle part of the end cap 6 is rotatably connected to the corresponding part on one side of the purified gas outlet pipe 12 through a sealed bearing, and one end of the purified gas outlet pipe 12 extends into the interior of the flexible filter element 5. The end cap 6, the cover plate 420, the flexible filter element 5, and the inner support rods 510 (not limited to four in a group) together form a filling space. The edge of the cover plate 420 is sealed to the opening of the upper box 10, and a liquid outlet pipe 13 is provided on the surface of the upper box 10. A set of round holes 421 are distributed on the surface of the cover plate 420. The liquid outlet pipe 13 is connected to an external gas-liquid separator and pump body to discharge the natural gas remaining in the liquid. At the same time, one end of the liquid outlet pipe 13 extends into the bottom box 4 space located on the upper side of the middle partition 410. The one end of the liquid outlet pipe 13 is always below the liquid surface and bypasses the area where natural gas bubbles emerge, which can reasonably discharge the liquid in this area, effectively control the liquid level, and greatly reduce the impact of the liquid in this area on the secondary reaction. A liquid level sensor is installed inside the bottom box 4 space located on the upper side of the central partition 410.

[0039] like Figure 10 As shown, two ultrasonic cleaning modules 18 are arranged vertically in one side space inside the liquid container 11, and the two ultrasonic cleaning modules 18 clean the porous adsorption belt 3 exposed at the lower slot 220. A discharge pipe 1110 is connected to one side of the bottom surface of the liquid container 11.

[0040] The liquid injected into the liquid container 11 and the liquid flowing out of the liquid outlet pipe 920 are two different liquids. The two different liquids are an alkaline liquid containing precipitated ions that combine with SO4²⁻ and a desulfurizing agent liquid, respectively.

[0041] Working principle: Under the action of the first flow control valve 810, the second flow control valve 910 and their external control equipment, the natural gas to be deacidified is controlled to enter the concave-convex cap 121 through a set of distributed check pipes 131 and gradually diffuses in the tiny gap between the contacting sheet 120 and the lower plate 130. At the same time, the liquid used for deacidification is controlled to enter the tiny gap between the contacting sheet 120 and the lower plate 130 through the liquid inlet pipe 9 and the liquid outlet pipe 920, thus achieving the effect of chemical reaction and deacidification of the liquid used for deacidification with the sulfur-containing components in the natural gas. This improves the sufficiency of the chemical reaction between the liquid used for deacidification and the sulfur-containing components in the natural gas, and can greatly reduce the residual amount of liquid used for deacidification that has been overused. When the deacidified natural gas enters the concave-convex cap 121 and pushes the gas in the cap 121 upward, the top of the cap 121 will first momentarily block and then separate the corresponding first orifice 111. The effects achieved are as follows: Firstly, it can greatly reduce the amount of liquid containing a small amount of deacidifying substances discharged from the first orifice 111 between the upper plate 110 and the sheet 120. Second point: The second orifice 122 is in an upward-moving and separated state from the surface of the lower plate 130 at the instant of the reaction between the natural gas to be deacidified and the liquid used for deacidification, so that the reacted liquid and natural gas can enter the space between the upper plate 110 and the sheet 120 through the second orifice 122, until they flow and diffuse upward from the first orifice 111. Thirdly: Under the high-frequency controlled input of natural gas to be deacidified and liquid used for deacidification, and combined with the tiny gap between sheet 120 and lower plate 130, after each deacidification chemical reaction is completed, the second orifice 122 is attached to the surface of lower plate 130 again under the action of water pressure above and ring 421. This can not only squeeze out a large amount of liquid and gas after the deacidification reaction between lower plate 130 and sheet 120, but also quickly reset sheet 120 to a state of contact with the surface of lower plate 130. Combination Figure 4 As shown, each segment of corrosion-resistant sponge 310 located on the porous adsorption belt 3 adsorbs a liquid located in the liquid container 11 and moves it to the upper hole 210. Combined with the deacidified liquid and natural gas passing through the segment of corrosion-resistant sponge 310, the sulfides in the deacidified liquid can react with the liquid in the segment of corrosion-resistant sponge 310 to form a secondary reaction precipitate, and the secondary reaction precipitate is attached to the segment of corrosion-resistant sponge 310. The section of corrosion-resistant sponge 310, with secondary reaction precipitates containing sulfide ions attached, is exposed at the lower slot 220 by movement, and is simultaneously positioned between two ultrasonic cleaning modules 18 distributed vertically. Figure 10 As shown, the effects are as follows: Firstly, the corrosion-resistant sponge 310 can more fully enter a liquid in the liquid container 11, eliminating the residue of deacidified liquid carried by the corrosion-resistant sponge 310. Secondly, by using ultrasonic waves to clean and remove the attached secondary reaction precipitates from the corrosion-resistant sponge 310 and collect them at the bottom of the liquid container 11, the corrosion-resistant sponge 310 can be restored to the state of re-adsorbing the surrounding liquid. When the porous adsorption belt 3 needs to be moved, the push-pull moving module 14 drives the connected carrier plate 16 to reciprocate along the guide rail. At the same time, the electromagnet component 15 on the carrier plate 16 is in a de-energized state during the return process. Thus, the movement of the electromagnet component 15, which generates a magnetic field when energized, can drive the magnetically connected magnetic component 331 and base belt 330 to move, thereby completing the positional movement and replacement of the multiple sections of corrosion-resistant sponge 310 on the porous adsorption belt 3. Under the control of the controller, the motor 710 drives the connected gear 7 to rotate back and forth, so that the arc tooth block 610 meshing with the gear 7 and the end cover 6 connected to the arc tooth block 610 are in the same position and rotate back and forth. This further drives all the movable inner support rods 510 to be in a torsional state. By using the four inner support rods 510 to be in a torsional state, the flexible filter element 5 can be torsionally deformed, and the packing can also be twisted. This can accelerate the transformation of the attached substances in the flexible filter element 5 and the packing from caking to loosening and falling off, and also provide convenience for subsequent rinsing and cleaning, ensuring the smooth air permeability and filtration of the flexible filter element 5 and the packing.

[0042] 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 natural gas deacidification device, characterized in that: The system includes a gas-liquid mixing mechanism (1), a porous adsorption belt (3) placed inside a closed-loop tube (2), a flexible filter element (5), and a middle partition (410) integrated with the closed-loop tube (2). The gas-liquid mixing mechanism (1) is located in the lower space inside the bottom box (4), and a cover plate (420) is sealed at the opening of the bottom box (4). The flexible filter element (5) is provided with a torsion mechanism inside, and the bottom of the flexible filter element (5) is sealed to the middle of the cover plate (420). Multiple closed-loop tubes (2) distributed on the middle partition (410) are connected to the upper and lower spaces of the bottom box (4) through upper strip holes (210). A section of the porous adsorption belt (3) is exposed at the upper strip hole (210), and the lower strip hole (220) located on the closed-loop tube (2) is located inside the liquid container (11). The sheet (120) located in the gas-liquid mixing mechanism (1) has concave and convex caps (121) distributed on its surface, and a second orifice (122) is opened on the surface between the concave and convex caps (121). A ring (123) is installed at each second orifice (122). The top of each concave and convex cap (121) moves upward to abut against the corresponding first orifice (111), and a check pipe (131) is covered inside the concave and convex cap (121). The lower surface of the sheet (120) contacts the upper surface of the lower plate (130), and a liquid output pipe (920) is provided between the sheet (120) and the lower plate (130).

2. The natural gas deacidification device according to claim 1, characterized in that: The gas-liquid mixing mechanism (1) also includes an upper plate (110), on which a set of first orifices (111) are distributed. The edges of the upper plate (110), the edges of the sheet (120) and the edges of the lower plate (130) are installed and fixed from top to bottom on the surrounding walls of the lower space in the bottom box (4). Each orifice on the lower plate (130) is connected to and installed with the check pipe (131). There is a gap between the upper plate (110) and the middle partition (410) located in the middle of the bottom box (4). A gas inlet pipe (8) is connected to and installed at the bottom of the bottom box (4), and a first flow control valve (810) is provided on the gas inlet pipe (8). One end of the liquid separation output pipe (920) is connected to and installed with a liquid inlet pipe (9), and a second flow control valve (910) is provided on the liquid inlet pipe (9).

3. A natural gas deacidification device according to claim 2, characterized in that: The diameter of the first orifice (111) is larger than that of the second orifice (122), and the first orifice (111) and the second orifice (122) are staggered. The diameter of the second orifice (122) is 0.5mm-1mm, and the second orifice (122) is connected to the corresponding part of the upper surface of the lower plate (130) by the ring (123) and the water pressure above.

4. A natural gas deacidification device according to claim 1, characterized in that: The porous adsorption belt (3) includes multiple sections of corrosion-resistant sponge (310), piston (320) and base belt (330). The multiple sections of corrosion-resistant sponge (310) are distributed on the base belt (330). A piston (320) is provided at the end of two adjacent sections of corrosion-resistant sponge (310), and the middle part of the piston (320) is fixedly connected to the base belt (330). The cross-section of the base belt (330) is not limited to a square structure, and a set of magnetic suction elements (331) are distributed inside the surrounding sidewalls of the base belt (330).

5. A natural gas deacidification device according to claim 4, characterized in that: The magnetic attractor (331) is attracted by the electromagnet assembly (15) located in the area below another part of the plurality of closed-loop tubes (2), and the electromagnet assembly (15) is mounted on the carrier plate (16). Guide rails are slidably mounted on both sides of the bottom of the carrier plate (16), and the two guide rails are mounted on the same carrier plate (17). The push-pull moving module (14) located on the carrier plate (17) is connected to the middle of the bottom of the carrier plate (16). The push-pull moving module (14) is not limited to a servo linear motor. The electromagnet assembly (15) is electrically connected to an external controller through wires.

6. A natural gas deacidification device according to claim 1, characterized in that: The torsion mechanism includes an inner support rod (510), a first ball head (511), a ring (512), a second ball head (513), and an end cap (6). One side of each inner support rod (510) is in contact with the inner surface of the flexible filter element (5), and the upper and lower ends of the inner support rod (510) are respectively connected to the first ball head (511) and the ring (512). Each first ball head (511) is movably connected to the ball groove structure corresponding to the bottom of the end cap (6), and each ring (512) is movably connected to the second ball head (513) located in the middle area of ​​the cover plate (420). The middle part of the end cap (6) is rotatably connected to the top middle position of the upper box (10) through a bearing, and the arc tooth block (610) located at the edge of the end cap (6) is meshed with a gear (7), and the gear (7) is installed on the shaft end of the motor (710). The bottom of the carrier connected to the motor (710) is fixedly installed on one side of the top of the upper box (10).

7. A natural gas deacidification device according to claim 6, characterized in that: The middle part of the end cap (6) is rotatably connected to the corresponding part on one side of the purified gas outlet pipe (12) through a sealed bearing, and one end of the purified gas outlet pipe (12) extends into the interior of the flexible filter element (5). The end cap (6), the cover plate (420), the flexible filter element (5) and the inner support rods (510) in groups of four or more together form a filling space. The edge of the cover plate (420) is sealed to the opening of the upper box (10), and a liquid outlet pipe (13) is provided on the surface of the upper box (10). A set of round holes (421) are distributed on the surface of the cover plate (420).

8. A natural gas deacidification device according to claim 1, characterized in that: Two ultrasonic cleaning modules (18) are arranged vertically in one side of the space inside the liquid container (11), and the two ultrasonic cleaning modules (18) clean the porous adsorption belt (3) exposed at the lower hole (220), and a discharge pipe (1110) is connected to the bottom side of the surface of the liquid container (11).

9. A natural gas deacidification device according to claim 1, characterized in that: The liquid injected into the liquid container (11) is different from the liquid flowing out of the liquid distribution pipe (920).

10. A natural gas deacidification device according to claim 1, characterized in that: The concave-convex cap (121) is not limited to a hard material, and the concave-convex cap (121) is conical in shape.

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