High-flux two-dimensional nanofiltration membrane unit for waste gas purification treatment

Abstract

The invention relates to the technical field of waste gas treatment, in particular to a high-flux two-dimensional nanofiltration membrane unit for waste gas purification treatment. Comprising a shell and a switching cylinder. A relay cylinder is arranged in the shell and communicated with an air inlet pipe, a branch pipe is arranged on one side of the relay cylinder and provided with a first piston rod, a pressurizing device is arranged in the air inlet pipe, a filter cylinder is arranged in a switching cylinder, a nanofiltration membrane is arranged in the filter cylinder, a switching mechanism is arranged on the shell, a cleaning mechanism is arranged in the shell, and the cleaning mechanism comprises an installation cylinder and a driving pipe. A second piston rod is arranged in the driving pipe and provided with a sprayer. According to the unit disclosed by the invention, waste gas is pressed into the relay cylinder through the pressurizing device, after the gas flux of the nanofiltration membrane is gradually reduced, the switching mechanism can drive the switching cylinder to rotate, and the cleaning mechanism can clean the standby filter cylinder, so that the unit can clean the nanofiltration membrane without stopping running, and the treatment efficiency of the waste gas is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of waste gas treatment, and in particular to a high-throughput two-dimensional nanofiltration membrane unit for waste gas purification. Background Art

[0002] Waste gas refers to toxic and harmful gases discharged by humans in the process of production and life. In particular, if a large amount of industrial waste gas is discharged into the atmosphere without being treated, it will inevitably reduce the quality of the atmospheric environment and bring serious harm to human health.

[0003] Nanofiltration membrane is a functional semi-permeable membrane that can be used for air filtration, waste gas treatment and air purification to remove particulate matter, bacteria, viruses and harmful gases in waste gas. However, the existing nanofiltration membrane waste gas purification device will become clogged after being used for a period of time, resulting in a reduction in gas flux. At this time, the device needs to be shut down for cleaning. Frequent shutdowns for cleaning are extremely labor-intensive, resulting in increased waste gas treatment costs and affected waste gas treatment efficiency. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a high-throughput two-dimensional nanofiltration membrane unit for waste gas purification.

[0005] The technical solution of the present invention is: a high-throughput two-dimensional nanofiltration membrane unit for exhaust gas purification treatment, comprising a shell, and a switching cylinder rotatably arranged on the top surface of the shell; a relay cylinder is arranged in the shell, the relay cylinder is connected to the air inlet pipe arranged on the side wall of the shell, a branch pipe is arranged on one side of the relay cylinder, a first piston rod connected to the branch pipe through a spring is arranged in the branch pipe, and a pressurizing device for pressing the gas inside the branch pipe into the relay cylinder is arranged in the air inlet pipe; a plurality of filter cylinders are arranged in the switching cylinder, the filter cylinders are divided into a plurality of spare filter cylinders and a working filter cylinder connected to the relay cylinder, the plurality of filter cylinders are arranged radially and at equal angles, and the filter Nanofiltration membranes are provided in the cylinders, and a switching mechanism is provided on the shell for controlling the position replacement of the spare filter cylinder and the working filter cylinder by lifting and lowering the first piston rod; a cleaning mechanism for cleaning the spare filter cylinder is provided in the shell, and the cleaning mechanism includes a mounting cylinder arranged in the shell and corresponding to the position of any spare filter cylinder, and a driving tube arranged on the mounting cylinder, a second piston rod is provided in the driving tube, the upper end of the branch pipe is connected with the upper end of the driving tube through a pipeline, the upper end of the second piston rod extends into the working filter cylinder and is provided with a nozzle for spraying cleaning liquid, and the second piston rod has a liquid channel, and the lower end of the driving tube is provided with a liquid supply device for supplying liquid to the nozzle.

[0006] Description: The above-mentioned unit presses the exhaust gas in the intake pipe into the relay cylinder through the pressurizing device. The exhaust gas will be processed through the nanofiltration membrane under the action of air pressure. With the increase of use time, the gas flux of the nanofiltration membrane gradually decreases. At this time, with the continued pressurization of the pressurizing device, the air pressure in the relay cylinder gradually increases, and the first piston rod will extend under the action of pressure, thereby rotating the switching cylinder through the switching mechanism to switch the position of the spare filter cylinder and the working filter cylinder. At the same time, the second piston rod will extend into the spare filter cylinder and clean the spare filter cylinder by spraying cleaning liquid through the nozzle, so that the nanofiltration membrane can be cleaned without stopping the unit, thereby ensuring the treatment efficiency of the exhaust gas.

[0007] Furthermore, the switching mechanism includes an arc groove arranged on the outer wall of the switching cylinder and corresponding to the filter cylinder one by one, and a vertical groove used to connect the lowest point and the highest point of adjacent arc grooves; the depth of the arc groove connected to the lower end of the vertical groove is greater than the depth of the vertical groove, and the depth of the arc groove connected to the upper end of the vertical groove is equal to the depth of the vertical groove. The upper end of the first piston rod passes through the top surface of the shell and is laterally slidably connected to a pressure column used to cooperate with the arc groove and the vertical groove to push the switching cylinder to rotate, and the pressure column and the first piston rod are connected by a spring.

[0008] Note: When the first piston rod is extended, the pressure column will slide upward and cooperate with the arc groove to push the switching cylinder to rotate, so that the positions of the spare filter cylinder and the working filter cylinder are switched. When the first piston rod is shortened, the pressure column will slide downward to the lower end of the vertical groove.

[0009] Furthermore, a valve plate is rotatably provided inside the filter cartridge for controlling the opening and closing of the filter cartridge by rotation, one end of the rotating shaft of the valve plate passes through the filter cartridge and is provided with a torsion block, and the valve plate is connected to the filter cartridge via a torsion spring, and an arc-shaped baffle is provided on the inner wall of the switching cartridge for triggering the torsion block to twist to close the spare filter cartridge when switching between the spare filter cartridge and the working filter cartridge.

[0010] Note: When the spare filter cartridge and the working filter cartridge are switched, the arc-shaped baffle bar can contact the torsion block, so that the torsion block drives the valve plate to rotate to close the spare filter cartridge. After the spare filter cartridge and the working filter cartridge are switched, the arc-shaped baffle bar separates from the torsion block, and the valve plate opens the spare filter cartridge under the action of the torsion spring to prevent the gas in the relay cartridge from being discharged through the spare filter cartridge before the spare filter cartridge rotates to the specified position, resulting in the spare filter cartridge being unable to be fully connected with the relay cartridge.

[0011] Furthermore, the driving tube is rotatably connected to the mounting tube, and a driving member for driving the driving tube to rotate is provided in the shell. The pressurizing device includes a crank sleeved on the lower end of the driving tube, an inflation piston slidingly sealed in the intake pipe, and a pull rod provided at one end of the inflation piston; one end of the pull rod passes through the intake pipe and is provided with a moving frame, and the crank is provided with an eccentric column which drives the inflation piston to reciprocate by cooperating with the moving frame through its rotation.

[0012] Description: The driving member can drive the crank to rotate through the driving tube, so that the eccentric column and the moving frame cooperate to drive the pull rod to reciprocate, and the pull rod drives the charging piston to slide back and forth in the intake pipe to press the exhaust gas in the intake pipe into the relay cylinder.

[0013] Furthermore, the liquid supply device includes a water tank arranged on the side wall of the shell, and a liquid bag arranged on one side of the inner wall of the movable frame and used for rotationally contacting the eccentric column; the liquid inlet of the liquid bag is connected to the water tank, and the liquid outlet of the liquid bag is connected to the inside of the driving tube.

[0014] Note: When the crank rotates, the eccentric column will reciprocate and squeeze the liquid bag. When the liquid bag is pressurized, the cleaning liquid in the liquid bag will enter the inside of the drive tube through the annular liquid tank and be released from the nozzle through the liquid channel.

[0015] Furthermore, the movable frame is slidably connected to the pull rod, and one side of the movable frame is connected to the pull rod through a spring, and the other side of the movable frame is connected to the pull rod through a first airbag. A second airbag for rotationally contacting the eccentric column is provided on the other side of the inner wall of the movable frame, and an air intake bin connected to the air outlet of the second airbag is provided on the top surface of the shell. The air intake bin is connected to the first airbag, and a deflation mechanism for deflation by rotating a switching cylinder is provided in the air intake bin.

[0016] Description: The second air bag and the liquid bag are squeezed every time the crank rotates one circle. When the eccentric column squeezes the second air bag, the second air bag can inflate the air inlet bin, causing the first air bag to gradually extend and push the moving frame to move to the left, so that the liquid bag is away from the eccentric column, avoiding continuous spraying of the cleaning liquid during the operation of the pressurizing device and reducing the consumption of the cleaning liquid. After each rotation of the switching cylinder, the air inlet bin will deflate to reset the moving frame. At this time, the nozzle can automatically spray the cleaning liquid to clean the nanofiltration membrane, reducing manual operation and improving the ease of use of the cleaning mechanism.

[0017] Furthermore, the venting mechanism is a rotating shaft arranged at the center of the bottom surface of the switching cylinder; the bottom surface of the air intake bin is provided with a venting hole, the lower end of the rotating shaft extends into the air intake bin and is sleeved with a rotating disk which controls the opening and closing of the venting hole by its rotation, and the rotating disk is provided with a plurality of openings for rotationally docking with the venting hole.

[0018] Note: When the switching cylinder rotates, the rotating shaft can drive the rotating disk to rotate, so that the opening is connected with the air release hole. At this time, the gas in the air intake chamber can be discharged to the outside.

[0019] The beneficial effects of the present invention are:

[0020] (1) The unit of the present invention presses the exhaust gas into the relay cylinder through the pressurizing device and treats the exhaust gas through the nanofiltration membrane. As the use time increases, the gas flux of the nanofiltration membrane will gradually decrease, causing the gas pressure in the relay cylinder to gradually increase. The first piston rod will extend, thereby rotating the switching cylinder through the switching mechanism to switch the positions of the standby filter cylinder and the working filter cylinder, and the cleaning mechanism will clean the nanofiltration membrane in the standby filter cylinder, so that the unit can clean the nanofiltration membrane without stopping operation, thereby ensuring the exhaust gas treatment efficiency.

[0021] (2) In the present invention, when the spare filter cartridge and the working filter cartridge are switched, the arc-shaped baffle bar can contact the torsion block, so that the torsion block drives the valve plate to rotate to close the spare filter cartridge, thereby preventing the gas in the relay cartridge from being discharged through the spare filter cartridge before the spare filter cartridge rotates to the specified position, resulting in the spare filter cartridge being unable to be fully connected with the relay cartridge.

[0022] (3) The crank of the present invention squeezes the second air bag and the liquid bag every time it rotates one circle, so that the second air bag inflates the air inlet bin, causing the first air bag to gradually extend and push the movable frame to move to the left, so that the liquid bag is away from the eccentric column, thereby avoiding continuous spraying of the cleaning liquid during the operation of the pressurizing device. After each rotation of the switching cylinder, the air inlet bin can be deflated to reset the movable frame. At this time, the nozzle can automatically spray the cleaning liquid to clean the nanofiltration membrane, thereby reducing manual operation and improving the convenience of the unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0024] Figure 2 is a longitudinal sectional view of embodiment 1 of the present invention;

[0025] Figure 3 It is a schematic diagram of the internal structure of the shell of Example 1 of the present invention;

[0026] Figure 4 Schematic diagram of the cleaning mechanism structure of embodiment 1 of the present invention;

[0027] Figure 5 yes Figure 4 A magnified image of point A;

[0028] Figure 6 is a cross-sectional view of an intake pipe according to Embodiment 1 of the present invention;

[0029] Figure 7 is a top view of embodiment 2 of the present invention;

[0030] Figure 8 is a schematic diagram of the switching cylinder structure of Example 2 of the present invention;

[0031] Fig. 9 is a schematic diagram of a mobile frame structure of Embodiment 3 of the present invention;

[0032] Fig.10 is a longitudinal sectional view of a shell of Embodiment 3 of the present invention;

[0033] Fig.11 Schematic diagram of the internal structure of the air intake bin according to Embodiment 3 of the present invention;

[0034] Among them, 1-shell, 11-relay cylinder, 12-branch pipe, 121-fixed cylinder, 122-first piston rod, 13-installation cylinder, 14-drive tube, 141-second piston rod, 142-nozzle, 143-annular air chamber, 144-annular liquid chamber, 15-crank, 151-eccentric column, 16-water tank, 17-intake chamber, 2-switching cylinder, 21-filter cylinder, 22-arc groove, 23-vertical groove, 24-pressure column, 25-nanofiltration membrane, 26-valve plate, 261-torsion block, 27-arc baffle, 28-rotating shaft, 29-rotating disk, 3-intake pipe, 31-inflatable piston, 32-pull rod, 33-moving frame, 34-liquid bag, 35-first air bag, 36-second air bag. DETAILED DESCRIPTION

[0035] In order to further illustrate the method adopted by the present invention and the effect achieved, the technical solution of the present invention will be clearly and completely described in combination with experiments below.

[0036] Example 1: Figure 1 , Figure 2 As shown, a high-throughput two-dimensional nanofiltration membrane unit for exhaust gas purification treatment comprises a housing 1 and a switching cylinder 2 rotatably arranged on the top surface of the housing 1; a relay cylinder 11 is arranged in the housing 1, the relay cylinder 11 is connected to an air intake pipe 3 arranged on the side wall of the housing 1, a branch pipe 12 is arranged on the right side of the relay cylinder 11, a first piston rod 122 is arranged in the branch pipe 12 for sliding connection with the branch pipe 12 through a spring, the spring is arranged between the piston of the first piston rod 122 and the upper end of the branch pipe 12, and a pressurizing device for pressing the gas inside the air intake pipe 3 into the relay cylinder 11 is arranged in the air intake pipe 3;

[0037] Four filter cartridges 21 are arranged in the switching cylinder 2, and the filter cartridges 21 are divided into three spare filter cartridges and a working filter cartridge connected to the relay cylinder 11. The four filter cartridges 21 are radially arranged at equal intervals of 90 degrees, and nanofiltration membranes 25 are arranged in the filter cartridges 21. The housing 1 is provided with a switching mechanism for controlling the position exchange of the spare filter cartridge 21 and the working filter cartridge 21 by lifting and lowering the first piston rod 122; a hot air blower for drying the spare filter cartridge opposite to the working filter cartridge is provided on the top surface of the housing 1, and the hot air blower adopts a prior art product;

[0038] The switching mechanism includes an arc groove 22 arranged on the outer wall of the switching cylinder 2 and corresponding to the filter cylinder 21, and a vertical groove 23 for connecting the lowest point and the highest point of the adjacent arc grooves 22; the depth of the arc groove 22 connected to the lower end of the vertical groove 23 is 3 cm greater than that of the vertical groove 23, and the depth of the arc groove 22 connected to the upper end of the vertical groove 23 is equal to the depth of the vertical groove 23. The upper end of the first piston rod 122 passes through the top surface of the shell 1 and is laterally slidably connected with a pressure column 24 for cooperating with the arc groove 22 and the vertical groove 23 to push the switching cylinder 2 to rotate. The pressure column 24 is laterally slidably connected to the fixed cylinder 121 provided at the upper end of the branch pipe 12, and the pressure column 24 is connected to the first piston rod 122 through a spring, and the spring is arranged between the pressure column 24 and the right end of the fixed cylinder 121;

[0039] like Figure 4 , Figure 5 As shown, a cleaning mechanism for cleaning the spare filter cartridge 21 is provided in the housing 1, and the cleaning mechanism includes a mounting cylinder 13 arranged in the housing 1 and adjacent to the position of the working filter cartridge, and a driving tube 14 arranged on the mounting cylinder 13, a second piston rod 141 is slidably provided in the driving tube 14, the upper end of the branch pipe 12 is communicated with an annular air bin 143 rotatably sleeved on the upper end of the driving tube 14 through a pipeline, the annular air bin 143 is located above the piston of the second piston rod 141, and the annular air bin 143 is communicated with the inside of the driving tube 14, the first piston rod 122 is composed of a sleeve at the upper end and a movable rod slidably arranged in the sleeve, and the inner diameters of the branch pipe 12 and the driving tube 14 are the same, and the length of the second piston rod 141 extending into the filter cartridge 21 is equal to the spacing between the movable rod and the sleeve, so that the second piston rod 141 can completely withdraw from the spare filter cartridge when the switching cylinder 2 starts to rotate;

[0040] The upper end of the second piston rod 141 extends into the working filter cylinder and is provided with a nozzle 142 for spraying cleaning liquid, and the second piston rod 141 has a liquid channel, the lower end of the driving tube 14 is provided with a liquid supply device for supplying liquid to the nozzle 142, and the side wall of the mounting cylinder 13 is provided with a liquid discharge pipe, which passes through the side wall of the housing 1;

[0041] The driving tube 14 is rotatably connected with the mounting tube 13. A driving member for driving the driving tube 14 to rotate is provided in the housing 1. The driving member includes a motor provided on the inner wall of the housing 1. The motor is a commercially available product. A pulley is sleeved on the output shaft of the motor. A pulley is sleeved on the driving tube 14. The two pulleys are transmitted through a transmission belt.

[0042] like Figure 6As shown, the pressurizing device includes a crank 15 sleeved on the lower end of the driving tube 14, a gas charging piston 31 which is slidingly sealed and arranged in the air intake pipe 3, and a pull rod 32 arranged at the right end of the gas charging piston 31; a one-way valve is arranged on the gas charging piston 31, and the one-way valve is unidirectionally connected from the air intake pipe 3 to the relay cylinder 11; the right end of the pull rod 32 passes through the air intake pipe 3 and is provided with a moving frame 33; the crank 15 is provided with an eccentric column 151 which drives the gas charging piston 31 to reciprocate by cooperating with the moving frame 33 through its rotation;

[0043] like Figure 3 As shown, the liquid supply device includes a water tank 16 arranged on the side wall of the shell 1, and a liquid capsule 34 arranged on the right side of the inner wall of the movable frame 33 and used for rotationally contacting the eccentric column 151; the liquid inlet of the liquid capsule 34 is connected with the water tank 16, and the liquid outlet of the liquid capsule 34 is connected with the annular liquid warehouse 144 rotatably mounted on the driving tube 14 through a hose, and the annular liquid warehouse 144 is connected with the inside of the driving tube 14, and the liquid inlet and liquid outlet of the liquid capsule 34 are both provided with one-way valves, the one-way valve at the liquid inlet is one-way connected from the water tank 16 to the liquid capsule 34, and the one-way valve at the liquid outlet is one-way connected from the liquid capsule 34 to the annular liquid warehouse 144.

[0044] The working principle of the above unit is as follows: the driving tube 14 is driven to rotate by the motor, the driving tube 14 drives the crank 15 to rotate, the crank 15 drives the charging piston 31 to slide back and forth left and right through the eccentric column 151 and the moving frame 33, the charging piston 31 draws the exhaust gas in the intake pipe 3 into the relay cylinder 11, and the exhaust gas in the relay cylinder 11 is filtered through the nanofiltration membrane 25 in the working filter cylinder under the action of air pressure. As the use time increases, the nanofiltration membrane 25 is gradually blocked, and the gas flux begins to decrease until the air intake in the relay cylinder 11 is greater than the gas flux of the nanofiltration membrane 25, and the air pressure in the relay cylinder 11 gradually increases;

[0045] Since the relay cylinder 11 is connected with the branch pipe 12, the first piston rod 122 slides upward under the action of air pressure, so that the gas above the piston of the first piston rod 122 enters the top of the driving tube 14 through the annular air chamber 143, and the second piston rod 141 will drop under the action of pressure, so that the nozzle 142 will withdraw from the spare filter cylinder. At the same time, the first piston rod 122 will drive the pressure column 24 to move upward, and the pressure column 24 will push the switching cylinder 2 to rotate through the arc groove 22 until the pressure column 24 rises to the highest point of the arc groove 22. At this time, the switching cylinder 2 rotates 90° to drive the spare filter cylinder to dock with the relay cylinder 11 to become a working filter cylinder. At this time, the gas flux is restored, and the exhaust gas continues to be processed through the working filter cylinder. The air pressure in the relay cylinder 11 is reduced, and the first piston rod 122 drives the pressure column 24 to drop to the lower end of the vertical groove 23;

[0046] After the switching cylinder 2 is rotated once, the previous working filter cylinder is rotated to dock with the installation cylinder 13 to become a spare filter cylinder. When the first piston rod 122 descends, the gas in the drive tube 14 will return to the branch pipe 12, causing the second piston rod 141 to rise. At this time, the second piston rod 141 drives the nozzle 142 to enter the spare filter cylinder, and drives the drive tube 14 to rotate through the driving member. The drive tube 14 will drive the nozzle 142 and the crank 15 to rotate, and the eccentric column 151 will intermittently squeeze the liquid capsule 34. When the liquid capsule 34 is pressurized, the cleaning liquid will be sent into the drive tube 14, so that the cleaning liquid is released from the nozzle 142 through the liquid channel to clean the nanofiltration membrane 25. After the switching cylinder 2 rotates again, the previous spare filter cylinder is docked with the hot air blower, and the nanofiltration membrane 25 is blown dry by the hot air blower.

[0047] Example 2: Figure 7 , Figure 8 As shown, this embodiment is basically the same as embodiment 1, except that a valve plate 26 is rotatably provided in the filter cartridge 21 for controlling the opening and closing of the filter cartridge 21 by rotation, the left end of the rotating shaft of the valve plate 26 passes through the filter cartridge 21 and is provided with a torsion block 261, and the right end of the valve plate 26 passes through the filter cartridge 21 and is connected to the filter cartridge 21 through a torsion spring, and an arc-shaped baffle 27 is provided on the inner wall of the switching cartridge 2 for triggering the torsion block 261 to twist to close the spare filter cartridge when switching between the spare filter cartridge and the working filter cartridge, and the right end of the arc-shaped baffle 27 is chamfered.

[0048] The working principle of the above-mentioned valve plate 26 is: when the switching cylinder 2 rotates, the torsion block 261 will contact the arc-shaped baffle 27. Under the action of the arc-shaped baffle 27, the torsion block 261 will rotate, causing the valve plate 26 to rotate. At this time, the valve plate 26 closes the spare filter cylinder to prevent the exhaust gas from passing through the spare filter cylinder when the spare filter cylinder has not yet been completely docked with the relay cylinder 11, resulting in an early pressure reduction in the relay cylinder 11.

[0049] Example 3: Fig. 9 , Fig.10As shown, this embodiment is basically the same as the embodiment 1, except that the moving frame 33 is slidably connected to the pull rod 32, the moving frame 33 is slidably connected to the pull rod 32 through a guide rod provided thereon, and the left side of the moving frame 33 is connected to the pull rod 32 through a spring, the spring is sleeved on the guide rod on the left side of the pull rod 32, the right side of the moving frame 33 is connected to the pull rod 32 through a first airbag 35, the first airbag 35 is sleeved on the guide rod on the right side of the pull rod 32, and the left side of the inner wall of the moving frame 33 is provided with a second airbag 36 for rotationally contacting with the eccentric column 151 The top surface of the shell 1 is provided with an air inlet bin 17 which is connected with the air outlet of the second airbag 36 through a pipeline. The air inlet and the air outlet of the second airbag 36 are both provided with a one-way valve. The one-way valve at the air inlet of the second airbag 36 is connected from the outside to the second airbag 36 in a one-way direction, and the one-way valve at the air outlet is connected from the second airbag 36 to the air inlet bin 17 in a one-way direction. The air inlet bin 17 is connected with the first airbag 35 through a pipeline, and a deflation mechanism is provided in the air inlet bin 17 for deflation by rotating the switching cylinder 2, and a pressure relief valve is provided in the air inlet bin 17;

[0050] like Fig.11 As shown, the venting mechanism is a rotating shaft 28 arranged at the center of the bottom surface of the switching cylinder 2; a venting hole is provided on the bottom surface of the air inlet bin 17, and the lower end of the rotating shaft 28 extends into the air inlet bin 17 and is sleeved with a rotating disk 29 that controls the opening and closing of the venting hole by its rotation, and the rotating disk 29 is provided with four openings for rotationally docking with the venting hole, and the openings are arc-shaped.

[0051] The working principle of the above-mentioned movable frame 33 is as follows: when the crank 15 rotates, the eccentric column 151 will intermittently squeeze the second air bag 36 and the liquid bag 34. Each time the eccentric column 151 squeezes the second air bag 36, the gas in the second air bag 36 will be filled into the air inlet bin 17, thereby increasing the pressure in the air inlet bin 17. Since the air inlet bin 17 is connected with the first air bag 35, the first air bag 35 will gradually extend under the action of air pressure. Under the action of the first air bag 35, the movable frame 33 will move to the right, thereby causing the liquid bag 34 to gradually move away from the eccentric column 151. When the crank 15 rotates, the eccentric column 151 cannot squeeze the liquid bag 34, and at this time the cleaning liquid stops spraying. When the switching cylinder 2 rotates, the opening will be aligned with the vent hole, so that the gas in the air inlet bin 17 is discharged. At this time, the first air bag 35 is restored, the movable frame 33 is reset, and the eccentric column 151 can squeeze the liquid bag 34 again to spray the cleaning liquid.

Claims

1. A high-throughput two-dimensional nanofiltration membrane unit for waste gas purification, characterized in that: The invention comprises a shell (1), and a switching cylinder (2) rotatably arranged on the top surface of the shell (1); a relay cylinder (11) is arranged in the shell (1), the relay cylinder (11) is connected to an air intake pipe (3) arranged on the side wall of the shell (1), a branch pipe (12) is arranged on one side of the relay cylinder (11), a first piston rod (123) is arranged in the branch pipe (12) and is slidably connected to the branch pipe (12) via a spring, a pressurizing device for pressing the gas in the air intake pipe (3) into the relay cylinder (11); a plurality of filter cylinders (21) are arranged in the switching cylinder (2), the filter cylinders (21) are divided into a plurality of spare filter cylinders and a working filter cylinder connected to the relay cylinder (11), the plurality of filter cylinders (21) are arranged radially and at equal angles, and nanofiltration membranes (25) are arranged in the filter cylinders (21), and the shell (1) A switching mechanism is provided on the housing (1) for controlling the position change of the standby filter cartridge (21) and the working filter cartridge (21) by lifting and lowering the first piston rod (123); a cleaning mechanism for cleaning the standby filter cartridge (21) is provided in the housing (1), the cleaning mechanism comprising a mounting cylinder (13) arranged in the housing (1) and corresponding to the position of any standby filter cartridge, and a driving tube (14) arranged on the mounting cylinder (13); a second piston rod (141) is slidably arranged in the driving tube (14); the upper end of the branch pipe (12) is connected to the upper end of the driving tube (14) through a pipeline; the upper end of the second piston rod (141) extends into the working filter cartridge and is provided with a nozzle (142) for spraying cleaning liquid; the second piston rod (141) has a liquid channel in it, and the lower end of the driving tube (14) is provided with a liquid supply device for supplying liquid to the nozzle (142).

2. A high-throughput two-dimensional nanofiltration membrane unit for waste gas purification according to claim 1, characterized in that: The switching mechanism comprises an arc groove (22) arranged on the outer wall of the switching cylinder (2) and corresponding to the filter cylinder (21) one by one, and a vertical groove (23) used to connect the lowest point and the highest point of adjacent arc grooves (22); the depth of the arc groove (22) connected to the lower end of the vertical groove (23) is greater than the depth of the vertical groove (23), and the depth of the arc groove (22) connected to the upper end of the vertical groove (23) is equal to the depth of the vertical groove (23); the upper end of the first piston rod (123) passes through the top surface of the shell (1) and is laterally slidably connected to a pressure column (24) used to cooperate with the arc groove (22) and the vertical groove (23) to push the switching cylinder (2) to rotate, and the pressure column (24) and the first piston rod (123) are connected by a spring.

3. A high-throughput two-dimensional nanofiltration membrane unit for waste gas purification according to claim 2, characterized in that: A valve plate (26) is rotatably provided inside the filter cartridge (21) for controlling the opening and closing of the filter cartridge (21) by means of rotation. One end of the rotating shaft of the valve plate (26) passes through the filter cartridge (21) and is provided with a torsion block (261). The valve plate (26) is connected to the filter cartridge (21) via a torsion spring. The inner wall of the switching cartridge (2) is provided with an arc-shaped retaining bar (27) for triggering the torsion block (261) to twist to close the spare filter cartridge when switching between the spare filter cartridge and the working filter cartridge.

4. A high-throughput two-dimensional nanofiltration membrane unit for waste gas purification according to claim 1, characterized in that: The driving tube (14) is rotatably connected to the mounting tube (13), and a driving member for driving the driving tube (14) to rotate is provided in the shell (1). The pressurizing device comprises a crank (15) sleeved on the lower end of the driving tube (14), an inflation piston (31) slidingly sealed in the air intake pipe (3), and a pull rod (32) provided at one end of the inflation piston (31); one end of the pull rod (32) passes through the air intake pipe (3) and is provided with a moving frame (33), and the crank (15) is provided with an eccentric column (151) which drives the inflation piston (31) to reciprocate by cooperating with the moving frame (33) through its rotation.

5. A high-throughput two-dimensional nanofiltration membrane unit for waste gas purification according to claim 4, characterized in that: The liquid supply device comprises a water tank (16) arranged on the side wall of the housing (1), and a liquid capsule (34) arranged on one side of the inner wall of the movable frame (33) and used for rotationally contacting with the eccentric column (151); the liquid inlet of the liquid capsule (34) is connected to the water tank (16), and the liquid outlet of the liquid capsule (34) is connected to the inside of the driving tube.

6. A high-throughput two-dimensional nanofiltration membrane unit for waste gas purification according to claim 5, characterized in that: The movable frame (33) is slidably connected to the pull rod (32), and one side of the movable frame (33) is connected to the pull rod (32) via a spring, and the other side of the movable frame (33) is connected to the pull rod (32) via a first air bag (35). A second air bag (36) for rotationally contacting the eccentric column (151) is provided on the other side of the inner wall of the movable frame (33). An air intake bin (17) connected to the air outlet of the second air bag (36) is provided on the top surface of the shell (1). The air intake bin (17) is connected to the first air bag (35), and a deflation mechanism is provided in the air intake bin (17) for deflation by rotating the switching cylinder (2).

7. A high-throughput two-dimensional nanofiltration membrane unit for waste gas purification according to claim 6, characterized in that: The degassing mechanism is a rotating shaft (28) arranged at the center of the bottom surface of the switching cylinder (2); the bottom surface of the air inlet bin (17) is provided with a degassing hole, the lower end of the rotating shaft (28) extends into the air inlet bin (17) and is sleeved with a rotating disk (29) which controls the opening and closing of the degassing hole by its rotation, and the rotating disk (29) is provided with a plurality of openings for rotationally docking with the degassing hole.

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