Membrane separation natural gas pretreatment device

Abstract

The invention provides a membrane separation natural gas pretreatment device, and relates to the technical field of natural gas separation. A cover plate is fixed on the top end surface of the treatment box, the top of the cover plate is connected with an exhaust pipe, the exhaust pipe is connected with a filter box for filtering gas, the front end surface and the rear end surface of the inner wall of the treatment box are respectively welded with a bearing plate, and a mounting seat for mounting a filter membrane is placed on the two bearing plates; four pressing blocks are fixed to the bottom end face of the cover plate, the four pressing blocks are each of a rectangular block structure, and after the cover plate is closed, the four pressing blocks make contact with the top end face of the mounting base; and gas inlet pipes are mounted on the treatment box in a linear array shape. In the aspect of gas entering, a gas inlet part composed of the gas inlet pipes, the connecting pipes and the gas inlet holes enables natural gas to uniformly enter the treatment box and the through holes in the auxiliary plate through the gas inlet pipes and the gas inlet holes in the fan-shaped array to further uniformly mix the gas, it is ensured that the natural gas makes full and uniform contact with the filtering membrane, and a foundation is laid for the high-quality filtering effect.

Description

Technical Field

[0001] The present invention relates to the technical field of natural gas separation, and in particular to a natural gas pretreatment device for membrane separation. Background Art

[0002] Natural gas membrane processing is a highly efficient gas treatment method based on membrane separation technology. With its unique working principle and significant advantages, it occupies an important position in the field of natural gas processing. Its core principle is to utilize the differences in the permeation rates of different gas molecules in membrane materials to achieve the separation and purification of various components in natural gas.

[0003] As shown in the application number: CN201711115609.3, the present invention discloses a process for dehydrating natural gas based on membrane separation technology, comprising the following steps: inputting wet natural gas into a filter for removing impurities; adjusting the flux of the first regulating valve so that the flux is 2-6 ml / s, and inputting the passed natural gas into a boosting device; conveying the pressurized natural gas to a heater via a buffer tank and a second regulating valve in sequence, the second regulating valve controlling the flux of the natural gas to be 2-6 ml / s; the heater heats the inflowing natural gas; the heated natural gas is separated via a membrane separator; and the natural gas at the outlet of the vacuum pump is cooled for gas-liquid separation. The present invention separates water from natural gas through membrane separation technology, ensuring that the water content in the natural gas meets transportation requirements and avoiding damage to the pipeline caused by water during the transmission of the natural gas. The invention has the characteristics of simple operation, low manufacturing cost and good dehydration effect.

[0004] Similar to the natural gas membrane separation device of the above application, there are still the following deficiencies: After a period of use, debris will remain on the membrane, and the membrane needs to be removed for cleaning, which is cumbersome. During separation, the natural gas cannot be evenly contacted with the membrane, affecting the separation effect.

[0005] Therefore, in view of this, the existing structure and defects are studied and improved, and a membrane separation natural gas pretreatment device is provided to achieve a more practical purpose. Summary of the Invention

[0006] In order to solve the above technical problems, the present invention provides a membrane separation natural gas pretreatment device to solve the problem that after a period of use, debris will remain on the membrane, and the membrane needs to be removed for cleaning, which is cumbersome; during separation, the natural gas cannot be uniformly contacted with the membrane, affecting the separation effect.

[0007] The present invention provides a natural gas pretreatment device for membrane separation, specifically comprising: a treatment box; a cover plate is fixed to the top surface of the treatment box, an exhaust pipe is connected to the top of the cover plate, a filter box for gas filtration is connected to the exhaust pipe, a support plate is welded to the front end surface and the rear end surface of the inner wall of the treatment box, and mounting seats for installing the filter membrane are placed on the two support plates; four pressing blocks are fixed to the bottom end surface of the cover plate, and the four pressing blocks are all rectangular block structures. When the cover plate is closed, the four pressing blocks are in contact with the top surface of the mounting seat; air intake pipes are installed in a linear array on the treatment box, the air intake pipes installed in the linear array are all welded to the connecting pipes, the air intake pipes installed in the linear array are all connected to the connecting pipes, and the connecting pipes are connected to an external air pump; the air intake pipes installed in the linear array are all cylindrical tubular structures, and air intake holes are opened in a fan-shaped array at the lower position of the outer wall of each air intake pipe.

[0008] Furthermore, the air intake pipe, connecting pipe and air intake hole together constitute the air intake part; an auxiliary plate is fixed in the processing box, the outer wall of the auxiliary plate contacts the inner wall of the processing box, the auxiliary plate is located above the air intake pipe, and the auxiliary plate is provided with through holes in a rectangular array.

[0009] Furthermore, an adjustment part is installed in the processing box, and the adjustment part is composed of an electric cylinder, a seat body and a first sealing block. Two electric cylinders are fixed on the bottom end surface of the inner wall of the processing box, and the protruding ends of the two electric cylinders are fixed on the seat body. The top surface of the seat body is welded with a first sealing block in a rectangular array. The first sealing block welded in a rectangular array is located below the through hole and corresponds one-to-one to the through hole.

[0010] Furthermore, the upper half of the first sealing block is a frustum-shaped structure. When the first sealing block is plugged into the through hole to complete the sealing of the through hole, the top surface of the first sealing block is flush with the top surface of the auxiliary plate.

[0011] Furthermore, a cleaning assembly is installed in the processing box, and the cleaning assembly consists of a first guide rod, a mounting block, an air jet, an air outlet, a threaded rod, a motor, a drive rod, a protrusion and a spring rod. Two first guide rods are fixed in the processing box, and mounting blocks are sliding on the two first guide rods. The top and bottom surfaces of the mounting block are fixed with an air jet through a clamp, and the two air jets are connected to an external air supply pump.

[0012] Furthermore, the two jet tubes are both cylindrical tubular structures, and each jet tube has air outlet holes in a linear array on its outer wall. The air outlet holes on the two jet tubes are inclined. The gas ejected from the air outlet holes on the upper jet tube contacts the filter membrane, and the gas ejected from the lower jet tube contacts the top surface of the auxiliary plate.

[0013] Furthermore, a motor is fixed to the left end surface of the processing box, a threaded rod is fixed to the output shaft of the motor, and the threaded rod is threadedly connected to the mounting block.

[0014] Furthermore, the bottom end surface of the mounting seat is welded with a protrusion in a rectangular array, and the protrusion is a semi-cylindrical structure. Two spring rods are fixed to the top surface of the mounting block, and the protruding ends of the two spring rods are in contact with the bottom end surface of the mounting seat. When the mounting block moves left and right, the two spring rods are continuously elastically engaged with the protrusion.

[0015] Furthermore, a sealing assembly is installed on the processing box, and the sealing assembly consists of a second guide rod, a second sealing block and a coil spring. Two second guide rods with a stepped rod-like structure are fixed to the right end face of the processing box, and a second sealing block slides on the two second guide rods. A coil spring is sleeved on each second guide rod, and the left ends of the two coil springs are elastically in contact with the right end face of the second sealing block. Under the elastic push of the two coil springs, the second sealing block is inserted into the cleaning hole opened on the right end face of the processing box.

[0016] Furthermore, the second sealing block is a stepped structure, the outer wall of the left half of the second sealing block contacts the inner wall of the cleaning hole, and the left end face of the right half of the second sealing block contacts the right end face of the processing box.

[0017] Furthermore, two driving rods are welded to the clamp of the lower air injection pipe, and both driving rods are L-shaped structures. When the air injection pipe moves to the right, the driving rods contact the second sealing block.

[0018] Compared with the prior art, the present invention has the following beneficial effects: In terms of gas entry, the air intake part of this application, which consists of an air intake pipe, a connecting pipe and an air intake hole, allows natural gas to enter the processing box evenly through multiple air intake pipes and a fan-shaped array of air intake holes. The through holes on the auxiliary plate further mix the gas, ensuring that the natural gas is in full and uniform contact with the filter membrane, laying the foundation for high-quality filtration effects.

[0019] The present application can flexibly control the gas flow and the state of the through-hole through the setting of the adjustment part; the electric cylinder drives the seat body and the first sealing block to move up and down, and utilizes the frustum-shaped structure of the upper part of the first sealing block to accurately adjust the size of the through-hole to achieve effective control of the gas flow, and at the same time, it can also completely seal the through-hole to meet the processing requirements under different working conditions; and the top surface of the first sealing block is designed to be flush with the auxiliary plate, which is convenient for removing residues on the auxiliary plate and keeping the inside of the device clean.

[0020] The present application realizes efficient cleaning of the filter membrane and the auxiliary plate through the setting of the cleaning component. After the through hole is sealed, the jet tube moves under the drive of the motor and the threaded rod. The upper jet tube blows off the debris from the filter membrane, and the lower jet tube collects the debris. The elastic connection between the spring rod on the mounting block and the protrusion of the mounting seat causes the filter membrane to vibrate, thereby enhancing the cleaning effect. At the same time, the driving rod and the sealing component are cleverly designed. When the jet tube moves, the driving rod pushes open the second sealing block, and the residue is blown out of the cleaning hole under the action of the jet, thereby realizing automatic cleaning and reducing the cost and frequency of manual maintenance.

[0021] In this application, through the setting of the sealing component, the stepped second sealing block is tightly inserted into the cleaning hole under the elastic action of the coil spring, effectively preventing gas leakage. At the same time, its unique structure enhances the sealing performance, avoids the safety hazards and energy waste caused by natural gas leakage, and ensures stable and safe operation of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments are briefly introduced below.

[0023] In the attached figure: Figure 1 It shows an axial structural schematic diagram of a natural gas pretreatment device for membrane separation according to the present invention; Figure 2 It shows a schematic diagram of the partially cutaway axial structure of a natural gas pretreatment device for membrane separation according to the present invention; Figure 3 It shows that according to the present invention Figure 2 Schematic diagram of the axial structure after rotation; Figure 4 It shows that according to the present invention Figure 3 A schematic diagram of the enlarged structure at point A; Figure 5 It shows that according to the present invention Figure 3 A schematic diagram of the enlarged structure at point B; Figure 6 It shows a schematic diagram of the axial structure of the auxiliary plate and the adjustment part according to the present invention; Figure 7 It shows that according to the present invention Figure 6 Schematic diagram of the axial structure after partial sectioning; Figure 8 A schematic diagram of the axial structure of the cleaning component according to the present invention is shown.

[0024] Reference Signs List 1. Processing box; 101. Cover plate; 102. Support plate; 103. Mounting seat; 104. Pressing block; 105. Exhaust pipe; 106. Filter box; 2. Air intake part; 201. Air intake pipe; 202. Connecting pipe; 203. Air inlet hole; 3. Auxiliary plate; 301. Through hole; 4. Adjustment part; 401. Electric cylinder; 402. Sealing body; 403. First sealing block; 5. Cleaning assembly; 501. First guide rod; 502. Mounting block; 503. Jet pipe; 504. Air outlet hole; 505. Threaded rod; 506. Motor; 507. Drive rod; 508. Protrusion; 509. Spring rod; 6. Sealing assembly; 601. Second guide rod; 602. Second sealing block; 603. Coil spring. DETAILED DESCRIPTION

[0025] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Example 1: As shown in the attached Figure 1 To the attached Figure 8 As shown: The present invention provides a natural gas pretreatment device for membrane separation, comprising: a treatment box 1; a cover plate 101 is fixed to the top surface of the treatment box 1, an exhaust pipe 105 is connected to the top of the cover plate 101, a filter box 106 for gas filtration is connected to the exhaust pipe 105, a support plate 102 is welded to the front end surface and the rear end surface of the inner wall of the treatment box 1, and a mounting seat 103 for mounting a filter membrane is placed on the two support plates 102; four pressing blocks 104 are fixed to the bottom end surface of the cover plate 101, and the four pressing blocks 104 are all rectangular block structures. When the cover plate 101 is closed, the four pressing blocks 104 are in contact with the top surface of the mounting seat 103. During use, the four pressing blocks 104 are pressed to the top surface of the mounting seat 103. Block 104 can complete the pressing and fixing of the mounting base 103; the air intake pipes 201 are installed in a linear array on the processing box 1, and the air intake pipes 201 installed in a linear array are all welded to the connecting pipes 202, and the air intake pipes 201 installed in a linear array are all connected to the connecting pipes 202, and the connecting pipes 202 are connected to the external air pump; the air intake pipes 201 installed in a linear array are all cylindrical tubular structures, and each air intake pipe 201 has an air intake hole 203 in a fan-shaped array at the lower position of the outer wall. When the air is taken in, the gas will enter the processing box 1 more evenly through multiple air intake pipes 201 and the air intake holes 203 in the fan-shaped array, thereby ensuring the subsequent filtering effect.

[0027] Among them, the air inlet pipe 201, the connecting pipe 202 and the air inlet hole 203 together constitute the air inlet part 2; an auxiliary plate 3 is fixed in the processing box 1, and the outer wall of the auxiliary plate 3 is in contact with the inner wall of the processing box 1. The auxiliary plate 3 is located above the air inlet pipe 201. The auxiliary plate 3 is provided with through holes 301 in a rectangular array. The gas enters the processing box 1 and moves upward. When the gas passes through the through holes 301 opened on the auxiliary plate 3, under the action of the through holes 301, the gas will be more mixed when moving upward, ensuring that the gas is in uniform contact with the filter membrane, thereby ensuring the quality of gas filtration.

[0028] Among them, an adjustment part 4 is installed in the processing box 1, and the adjustment part 4 is composed of an electric cylinder 401, a base body 402 and a first sealing block 403. Two electric cylinders 401 are fixed to the bottom end surface of the inner wall of the processing box 1, and the protruding ends of the two electric cylinders 401 are fixed on the base body 402. The top surface of the base body 402 is welded with a first sealing block 403 in a rectangular array. The first sealing block 403 welded in a rectangular array is located below the through hole 301 and corresponds one-to-one with the through hole 301. When adjusting the size of the through hole 301 and realizing the sealing of the through hole 301, the two electric cylinders 401 can be driven to extend. The two electric cylinders 401 drive the base body 402 and the first sealing block 403 to move upward. The size adjustment and sealing of the through hole 301 can be realized by plugging the first sealing block 403 into the through hole 301.

[0029] Among them, the upper half of the first sealing block 403 is a frustum-shaped structure. When the first sealing block 403 is plugged into the through hole 301 to complete the sealing of the through hole 301, the top surface of the first sealing block 403 is flush with the top surface of the auxiliary plate 3. By flushing the top surface of the first sealing block 403 with the top surface of the auxiliary plate 3, the residue dropped on the top surface of the auxiliary plate 3 can be easily removed.

[0030] Among them, a cleaning component 5 is installed in the processing box 1, and the cleaning component 5 consists of a first guide rod 501, a mounting block 502, an air jet 503, an air outlet 504, a threaded rod 505, a motor 506, a drive rod 507, a protrusion 508 and a spring rod 509. Two first guide rods 501 are fixed in the processing box 1, and mounting blocks 502 are slid on the two first guide rods 501. The mounting blocks 502 and the top and bottom surfaces of the mounting blocks 502 are fixed with an air jet 503 through clamps, and the two air jets 503 are connected to an external air supply pump.

[0031] Among them, the two jet pipes 503 are both cylindrical tubular structures, and each jet pipe 503 has an air outlet 504 in a linear array on the outer wall. The air outlet 504 on the two jet pipes 503 are both inclined. The gas ejected from the air outlet 504 on the upper jet pipe 503 contacts the filter membrane, and the gas ejected from the lower jet pipe 503 contacts the top surface of the auxiliary plate 3.

[0032] Among them, a motor 506 is fixed on the left end face of the processing box 1, and a threaded rod 505 is fixed on the output shaft of the motor 506. The threaded rod 505 is threadedly connected to the mounting block 502. When cleaning the filter membrane, the two electric cylinders 401 are driven to extend until the first sealing block 403 completes the sealing of the through hole 301; the external air supply pump is started, and the jet pipe 503 begins to spray, driving the motor 506. The motor 506 drives the threaded rod 505 to rotate. Under the thread drive of the threaded rod 505, the two jet pipes 503 move to the right. In the process of the two jet pipes 503 moving to the right, the upper jet pipe 503 completes the blowing off of debris on the bottom end face of the filter membrane, and the blown-off debris falls on the auxiliary plate 3. At this time, the debris is gathered to the right through the lower jet pipe 503.

[0033] Among them, the bottom end surface of the mounting seat 103 is welded with a protrusion 508 in a rectangular array shape, and the protrusion 508 is a semi-cylindrical structure. Two spring rods 509 are fixed to the top surface of the mounting block 502, and the protruding ends of the two spring rods 509 are in contact with the bottom end surface of the mounting seat 103. When the mounting block 502 moves left and right, the two spring rods 509 are continuously elastically engaged with the protrusion 508. Vibration can be generated through the continuous elastic engagement of the two spring rods 509 with the protrusion 508, and vibration cleaning of the filter membrane can be achieved through vibration.

[0034] Among them, a sealing assembly 6 is installed on the processing box 1, and the sealing assembly 6 consists of a second guide rod 601, a second sealing block 602 and a coil spring 603. Two second guide rods 601 with a stepped rod-shaped structure are fixed to the right end face of the processing box 1. A second sealing block 602 slides on the two second guide rods 601, and a coil spring 603 is sleeved on each second guide rod 601. The left ends of the two coil springs 603 are elastically in contact with the right end face of the second sealing block 602. Under the elastic push of the two coil springs 603, the second sealing block 602 is inserted into the cleaning hole opened on the right end face of the processing box 1.

[0035] Among them, the second sealing block 602 has a stepped structure, the outer wall of the left half of the second sealing block 602 contacts the inner wall of the cleaning hole, and the left end face of the right half of the second sealing block 602 contacts the right end face of the processing box 1. During use, the stepped structure of the second sealing block 602 can improve the sealing performance at the cleaning hole.

[0036] Example 2: Based on Example 1, it also includes: two driving rods 507 are welded on the clamp of the lower air jet pipe 503, and the two driving rods 507 are both L-shaped structures. When the air jet pipe 503 moves to the right, the driving rods 507 contact the second sealing block 602. During the debris cleaning process, when the lower air jet pipe 503 moves to the right to complete the rightward collection of the debris, the second sealing block 602 can be pushed open by the two driving rods 507. At this time, the debris can be blown out from the cleaning hole under the jet action of the lower air jet pipe 503.

[0037] The specific usage and function of this embodiment are as follows: When the air is taken in, the air will enter the processing box 1 more evenly through the multiple air inlet pipes 201 and the air inlet holes 203 opened in the fan-shaped array. After entering the processing box 1, the air moves upward and passes through the through hole 301. When the air passes through the through hole 301 opened on the auxiliary plate 3, the air will be more mixed when moving upward; the air continues to move upward and passes through the filter membrane to complete the filtration. The filtered gas enters the filter box 106 through the exhaust pipe 105, and is filtered again by the filter box 106 and discharged into the collection pipe; when adjusting the size of the through hole 301 and sealing the through hole 301, the two electric cylinders 401 can be driven to extend. The two electric cylinders 401 drive the seat body 402 and the first sealing block 403 to move upward. The size adjustment and sealing of the through hole 301 can be achieved by plugging the first sealing block 403 into the through hole 301; when cleaning the filter membrane, the two electric cylinders 401 are driven to extend until the first sealing block 40 3 completes the sealing of the through hole 301; the external air supply pump is started, the air jet starts to be ejected at the air jet pipe 503, the motor 506 is driven, the motor 506 drives the threaded rod 505 to rotate, and the two air jet pipes 503 move to the right under the thread drive of the threaded rod 505. In the process of the two air jet pipes 503 moving to the right, the upper air jet pipe 503 completes the blowing off of the debris on the bottom end surface of the filter membrane, and the blown-off debris falls on the auxiliary plate 3. At this time, the debris is collected to the right by the lower air jet pipe 503; at the same time, the two spring rods 509 are continuously elastically engaged with the protrusion 508, and the continuous elastic engagement of the two spring rods 509 with the protrusion 508 can generate vibration, and the vibration cleaning of the filter membrane can be achieved by vibration; when the lower air jet pipe 503 moves to the right to complete the rightward collection of the residue, the second sealing block 602 can be pushed open by the two driving rods 507. At this time, the residue can be blown out of the cleaning hole under the jet action of the lower air jet pipe 503.

Claims

1. A natural gas pretreatment device for membrane separation, characterized in that: include: Processing box; A cover plate is fixed on the top surface of the processing box, an exhaust pipe is connected to the top of the cover plate, and a filter box for gas filtering is connected to the exhaust pipe. The front end surface and the rear end surface of the inner wall of the processing box are welded with a support plate, and mounting seats for installing the filter membrane are placed on the two support plates; four pressing blocks are fixed on the bottom end surface of the cover plate, and the four pressing blocks are all rectangular block structures. When the cover is closed, the four pressing blocks are in contact with the top surface of the mounting seat; air intake pipes are installed in a linear array on the processing box, and the air intake pipes installed in the linear array are all welded to the connecting pipes. The air intake pipes installed in the linear array are all connected to the connecting pipes, and the connecting pipes are connected to the external air pump; the air intake pipes installed in the linear array are all cylindrical tubular structures, and an air intake hole is opened in a fan-shaped array at the lower position of the outer wall of each air intake pipe; an auxiliary plate is fixed in the processing box, the outer wall of the auxiliary plate contacts the inner wall of the processing box, the auxiliary plate is located above the air intake pipe, and the auxiliary plate is provided with through holes in a rectangular array.

2. A natural gas pretreatment device for membrane separation according to claim 1, characterized in that: The air intake pipe, connecting pipe and air intake hole together constitute the air intake part; an adjustment part is installed in the processing box, and the adjustment part is composed of an electric cylinder, a seat body and a first sealing block. Two electric cylinders are fixed on the bottom end surface of the inner wall of the processing box, and the protruding ends of the two electric cylinders are fixed on the seat body. The top surface of the seat body is welded with a first sealing block in a rectangular array. The first sealing block welded in a rectangular array is located below the through hole and corresponds one-to-one to the through hole.

3. A natural gas pretreatment device for membrane separation according to claim 2, characterized in that: The upper half of the first sealing block is a frustum-shaped structure. When the first sealing block is plugged into the through hole and the through hole is sealed, the top surface of the first sealing block is flush with the top surface of the auxiliary plate.

4. A natural gas pretreatment device for membrane separation according to claim 3, characterized in that: A cleaning assembly is installed in the processing box, and the cleaning assembly consists of a first guide rod, a mounting block, an air jet, an air outlet, a threaded rod, a motor, a drive rod, a protrusion and a spring rod. Two first guide rods are fixed in the processing box, and mounting blocks are slid on the two first guide rods. The top and bottom end surfaces of the mounting block are fixed with an air jet through a clamp, and the two air jets are connected to an external air supply pump.

5. A membrane separation natural gas pretreatment device as claimed in claim 4, characterized in that: The two jet tubes are both cylindrical tubular structures, and each jet tube has air outlet holes in a linear array on its outer wall. The air outlet holes on the two jet tubes are inclined. The gas ejected from the air outlet holes on the upper jet tube contacts the filter membrane, and the gas ejected from the lower jet tube contacts the top surface of the auxiliary plate.

6. A natural gas pretreatment device for membrane separation according to claim 5, characterized in that: A motor is fixed on the left end surface of the processing box, a threaded rod is fixed on the output shaft of the motor, and the threaded rod is threadedly connected to the mounting block.

7. A natural gas pretreatment device for membrane separation according to claim 6, characterized in that: The bottom end surface of the mounting seat is welded with a protrusion in a rectangular array, and the protrusion is a semi-cylindrical structure. Two spring rods are fixed to the top surface of the mounting block. The protruding ends of the two spring rods are in contact with the bottom end surface of the mounting seat. When the mounting block moves left and right, the two spring rods are continuously elastically engaged with the protrusion.

8. A natural gas pretreatment device for membrane separation according to claim 7, characterized in that: A sealing assembly is installed on the processing box, which consists of a second guide rod, a second sealing block and a coil spring. Two second guide rods with stepped rod-like structures are fixed to the right end face of the processing box. A second sealing block slides on the two second guide rods. A coil spring is sleeved on each second guide rod. The left ends of the two coil springs are elastically in contact with the right end face of the second sealing block. Under the elastic push of the two coil springs, the second sealing block is inserted into the cleaning hole opened on the right end face of the processing box.

9. A natural gas pretreatment device for membrane separation according to claim 8, characterized in that: The second sealing block is a stepped structure, the outer wall of the left half of the second sealing block contacts the inner wall of the cleaning hole, and the left end surface of the right half of the second sealing block contacts the right end surface of the processing box.

10. A membrane separation natural gas pretreatment device according to claim 9, characterized in that: Two driving rods are welded to the clamp of the lower jet pipe. Both driving rods are L-shaped structures. When the jet pipe moves to the right, the driving rods contact the second sealing block.

Images