A quick-release air-water pulse membrane cleaning device

Abstract

This utility model relates to the field of air-water pulse membrane cleaning technology, and discloses a quick-release air-water pulse membrane cleaning device, including a cleaning tank. A filter membrane assembly is installed inside the cleaning tank. An upper cleaner connected to the top of the filter membrane assembly is engaged with the top of the cleaning tank, and a lower cleaner connected to the bottom of the filter membrane assembly is engaged with the bottom of the cleaning tank. Both the upper and lower cleaners are equipped with bubble equalization plates. The upper and lower cleaners perform alternating forward and reverse pulse rinsing on the filter membrane assembly, so that the deposit layer is first loosened by the forward pulse cleaning liquid and then peeled off by the reverse pulse cleaning liquid. The unidirectional tension is halved, which improves the deposition layer peeling rate. At the same time, the Venturi tubes in the upper and lower cleaners can perform peak reduction treatment on the liquid pulse front end and store the energy, which maintains the rinsing intensity and avoids instantaneous overload of the membrane fibers.

Description

Technical Field

[0001] This utility model relates to the field of air-water pulse membrane cleaning technology, and in particular to a quick-release air-water pulse membrane cleaning device. Background Technology

[0002] Traditional water pollution cleaning methods involve manual labor, adding chemicals to the water source, and allowing sedimentation and filtration after a period of time. This method has a long lead time. Currently, water treatment equipment uses spiral wound reverse osmosis membrane modules, spiral wound nanofiltration membrane modules, and spiral wound ultrafiltration membrane modules to filter the water source. However, after repeated use, impurities from the water will accumulate on the inner surface of the existing filter membrane modules, requiring internal rinsing. However, conventional direct rinsing with water is generally ineffective, and existing filter membrane modules are cumbersome to install and take a long time to assemble.

[0003] In a quick-release air-water mixing membrane module cleaning device with application number CN202221933079.X, a pin is provided on the side of the top cover to fix the top cover and the barrel body. A rotating rod is threadedly connected to the middle of the top cover. The filter membrane module is set inside the barrel body and passes through the lower opening. A water inlet is provided on the top of the filter membrane module. A water pipe passing through the stepped channel and channel two is connected to the upper end of the water inlet. A water inlet branch pipe and a cleaning pipe are connected to the water pipe. The cleaning pipe is connected to a mixing chamber. An air compressor is connected to the lower end of the mixing chamber.

[0004] However, in actual use, due to the large peak value of the pulse flow rate, the local shear force on the membrane surface is too high, which can easily tear the membrane fibers. When the pulse flow rate is at its lowest value, the flow rate is insufficient and pollutants remain. During air-water pulse cleaning, air enters the membrane cavity and forms air pockets, which leads to pulse energy attenuation, membrane vibration imbalance, and bulging.

[0005] Therefore, this utility model proposes a quick-release air-water pulse membrane cleaning device to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a quick-release air-water pulse membrane cleaning device to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a quick-release air-water pulse membrane cleaning device, comprising a cleaning tank, a filter membrane assembly being installed inside the cleaning tank, an upper cleaner connected to the top of the filter membrane assembly being engaged with the top of the cleaning tank, and a lower cleaner connected to the bottom of the filter membrane assembly being engaged with the bottom of the cleaning tank.

[0008] The upper cleaner includes an upper water inlet pipe, the top of which is connected to a mixing chamber, which is connected to an air inlet pipe and a cleaning pipe. A first three-way valve is mounted on the upper water inlet pipe, and an upper drain pipe is mounted on the first three-way valve. A first venturi tube is connected to the bottom of the upper water inlet pipe, and a first threaded connector is connected to the bottom of the first venturi tube.

[0009] Preferably, the lower cleaner has the same basic structure as the upper cleaner, including a lower water inlet pipe, a second three-way valve mounted on the lower water inlet pipe, a lower drain pipe mounted on the second three-way valve, a second venturi tube connected to the top of the lower water inlet pipe, and a second screw connector connected to the top of the second venturi tube.

[0010] Preferably, the upper cleaner further includes a sealing ring fixedly sleeved on the outer wall of the first screw joint, and the first screw joint is rotatably assembled at the bottom end of the first venturi tube via a bearing, the second screw joint and the second venturi tube are fixedly connected, and a bubble equalizing plate is fixedly assembled inside the first screw joint and the second screw joint.

[0011] Preferably, the first and second Venturi tubes have the same structure, both including a tapered section, the tapered section being connected to a voltage stabilizing section, and the voltage stabilizing section being connected to a buffer section.

[0012] Preferably, the top of the filter membrane assembly is provided with a limiting ring, and the middle of the top of the limiting ring is integrally formed with a water inlet connection end. The bottom of the filter membrane assembly is provided with a water outlet connection end, and the water outlet connection end is uniformly provided with water guiding channels.

[0013] Preferably, the top of the cleaning tub is magnetically fitted with a top cover, the top center of which has an installation hole that matches the sealing ring, and a support rod is fixed on the inner side wall of the cleaning tub, with a limit seat fixed at the end of the support rod.

[0014] Preferably, the limiting seat is in four sets, which are combined to form a limiting structure sleeved on the outside of the limiting ring, and each set of limiting seats has an arc-shaped groove on the top that matches the limiting ring.

[0015] Preferably, the first screw connector is threaded onto the water inlet connection end, and the second screw connector is threaded onto the water outlet connection end.

[0016] The technical effects and advantages of this utility model are as follows:

[0017] This invention features an upper and a lower washer positioned above and below the filter membrane assembly, respectively. These alternating forward and reverse pulses clean the filter membrane assembly, causing the deposited layer to be loosened by the forward pulse cleaning liquid and then peeled off by the reverse pulse cleaning liquid. This halves the unidirectional tension, increasing the deposition layer peeling rate. Simultaneously, the Venturi tubes in the upper and lower washer ensure a more uniform distribution of the gas-water two-phase flow velocity entering the filter membrane assembly, avoiding localized high shear points and significantly reducing the maximum strain on the membrane fiber surface. This allows for peak reduction at the pulse tip and energy leveling, maintaining the cleaning intensity while preventing instantaneous overload of the membrane fiber. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a first-view structural schematic diagram of the overall cross-section of this utility model;

[0020] Figure 3 This is a schematic diagram of the overall cross-section of the present invention from a second perspective.

[0021] Figure 4 This is a schematic diagram of the cleaning bucket structure of this utility model;

[0022] Figure 5 This is a schematic diagram of the filter membrane assembly structure of this utility model;

[0023] Figure 6 This is a schematic diagram of the upper cleaner structure of this utility model;

[0024] Figure 7 This is a schematic diagram of the lower washer structure of this utility model;

[0025] Figure 8 This utility model Figure 3 Enlarged structural diagram of section A in the middle;

[0026] Figure 9 This is a cross-sectional view of the first Venturi tube of this utility model.

[0027] In the diagram: 10. Cleaning tank; 11. Top cover; 12. Mounting hole; 13. Support rod; 14. Limiting seat; 20. Filter membrane assembly; 21. Limiting ring; 22. Water inlet connection; 23. Water outlet connection; 24. Water guide channel; 30. Upper cleaner; 31. Upper water inlet pipe; 32. Mixing chamber; 33. Air inlet pipe; 34. Cleaning pipe; 35. First three-way valve; 36. Upper drain pipe; 37. First venturi tube; 371. Gradient section; 372. Pressure stabilizing section; 373. Buffer section; 38. First screw connector; 39. Sealing ring; 40. Lower cleaner; 41. Lower water inlet pipe; 42. Second three-way valve; 43. Lower drain pipe; 44. Second venturi tube; 45. Second screw connector; 50. Bubble equalization plate. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0029] like Figures 1 to 9 As shown, this embodiment discloses a quick-release air-water pulse membrane cleaning device, including a cleaning tank 10. A filter membrane assembly 20 is installed inside the cleaning tank 10 with a limiting function. An upper cleaner 30 connected to the top of the filter membrane assembly 20 is engaged with the top of the cleaning tank 10, and a lower cleaner 40 connected to the bottom of the filter membrane assembly 20 is engaged with the bottom of the cleaning tank 10. The filter membrane assembly 20 is quickly installed inside the cleaning tank 10. At the same time, the upper cleaner 30 is connected to the top of the filter membrane assembly 20, and the lower cleaner 40 is connected to the bottom of the filter membrane assembly 20. An air-water mixture is introduced into the filter membrane assembly 20 through the upper cleaner 30. During this process, the liquid peaks can be reduced, the pressure stabilized, and the liquid can be evenly distributed, thereby reducing the impact shear force of the liquid and achieving eddy current dissipation. While keeping the total flushing energy constant, the velocity distribution of the gas-water two-phase liquid entering the filter membrane module 20 is more uniform, avoiding local high shear points and pulling the membrane fibers in the filter membrane module 20 back from the edge of fatigue failure to a safe zone, greatly improving the protection of the filter membrane module 20. A lower cleaner 40 is added at the outlet of the filter membrane module 20 to achieve reverse flushing. The lower cleaner 40 and the upper cleaner 30 alternate pulses. A three-way valve is installed on the lower cleaner 40 and the upper cleaner 30 to complete the alternating forward and reverse pulse flushing. This allows the deposit layer to be loosened by the forward pulse flushing liquid and then peeled off by the reverse pulse flushing liquid. The unidirectional tension is halved, which increases the deposit layer peeling rate by 50%.

[0030] Please see Figure 6The upper washer 30 includes an upper water inlet pipe 31, with a mixing chamber 32 connected to the top of the upper water inlet pipe 31. The mixing chamber 32 is connected to an air inlet pipe 33 and a cleaning pipe 34. The cleaning pipe 34 is connected to a water pump, and the air inlet pipe 33 is connected to an air compressor. In use, 0.3MPa compressed air and 0.2MPa clean water are input into the mixing chamber 32 to form a two-phase air-water flow. Moreover, a check valve is installed at the input end of the mixing chamber 32 to prevent water backflow. A first three-way valve 35 is installed on the upper water inlet pipe 31, and an upper drain pipe 36 is installed on the first three-way valve 35. A first venturi tube 37 is connected to the bottom end of the upper water inlet pipe 31, and a first threaded connector 38 is connected to the bottom end of the first venturi tube 37. The first three-way valve 35 has three valve ports: main pipe, air-water pulse source, and drain, to achieve zero backflow during "rinsing-water inlet".

[0031] Please see Figure 7 The basic structure of the lower cleaner 40 is the same as that of the upper cleaner 30, including a lower water inlet pipe 41, a second three-way valve 42 is mounted on the lower water inlet pipe 41, a lower drain pipe 43 is mounted on the second three-way valve 42, a second venturi tube 44 is connected to the top of the lower water inlet pipe 41, and a second screw connector 45 is connected to the top of the second venturi tube 44.

[0032] Please see Figure 6 The upper cleaner 30 also includes a sealing ring 39 fixedly sleeved on the outer wall of the first screw joint 38, and the first screw joint 38 is rotatably assembled at the bottom end of the first venturi tube 37 via a bearing, and the second screw joint 45 and the second venturi tube 44 are fixedly connected.

[0033] Please see Figure 5 The filter membrane assembly 20 has a limiting ring 21 at the top, and an inlet connection end 22 is integrally formed in the middle of the top of the limiting ring 21. The filter membrane assembly 20 has an outlet connection end 23 at the bottom, and water guiding channels 24 are evenly opened on the outlet connection end 23. The first screw connector 38 is threaded to the inlet connection end 22, and the second screw connector 45 is threaded to the outlet connection end 23.

[0034] Please see Figure 4 The top of the cleaning tank 10 is magnetically fitted with a top cover 11. The top center of the top cover 11 has a mounting hole 12 that matches the sealing ring 39. A support rod 13 is fixed on the inner side wall of the cleaning tank 10. A limiting seat 14 is fixed at the end of the support rod 13. There are four sets of limiting seats 14, which are combined to form a limiting structure set outside the limiting ring 21. Each set of limiting seats 14 has an arc-shaped groove on the top that matches the limiting ring 21. When the filter membrane assembly 20 is installed inside the cleaning tank 10, the limiting ring 21 is limited by the limiting seat 14. When the top cover 11 is magnetically installed on the cleaning tank 10, the cover is sealed, which facilitates quick disassembly and assembly of the filter membrane assembly 20 and the cleaning tank 10, improving the ease of disassembly and assembly.

[0035] During forward pulse cleaning, water is supplied using the upper cleaner 30 to clean the membrane module 20. The gas-water two-phase liquid is ejected at high speed from the inner cavity of the membrane fibers at 0.3 MPa. The shear force loosens the blockage layer at the membrane pores. The cleaning liquid is discharged from the second three-way valve 42 and the lower drain pipe 43 on the lower cleaner 40. After a one-second pause, the membrane fibers elastically rebound, and the instantaneous negative pressure sucks the loose particles away from the surface, while simultaneously relaxing the membrane fibers to prevent continuous stretching. Subsequently, reverse pulse cleaning is performed. Water is supplied from the lower cleaner 40 to backwash the membrane module 20. The gas-water two-phase liquid enters from the outside of the membrane and backwashes the membrane pores, discharging the loosened particles with the water flow through the first three-way valve 35 and the upper drain pipe 36. This completes the alternating forward and reverse pulse cleaning, improving the peeling rate of the deposited layer on the membrane module 20. Because the membrane fibers are alternately pressurized at both ends, the maximum tensile stress in one direction is halved, the membrane fiber breakage rate is significantly reduced, and the fatigue life is improved. The three-way valve responds quickly, ensuring no water flow impact during switching.

[0036] In practical use, the first screw connector 38 passes through the mounting hole 12, and the sealing ring 39 is assembled inside the mounting hole 12. By manually rotating the sealing ring 39, the first screw connector 38 can be screwed onto the water inlet connection end 22 at the top of the filter membrane assembly 20. After the connection is completed, the top cover 11 is magnetically installed on the top of the cleaning tank 10, thus completing the assembly. Similarly, the second screw connector 45 is screwed onto the bottom of the filter membrane assembly 20 to complete the connection of the cleaning path. Moreover, the first screw connector 38 and the second screw connector 45 are fixedly assembled with a bubble equalization plate 50 inside. A 0.5mm thick porous plate with a pore diameter of 1mm and an opening rate of 40% is set at the water inlet connection end 22. The large vortex generated when the cleaning liquid flows is cut into uniform small vortices by the bubble equalization plate 50, which reduces the instantaneous impact force of the small vortices on the filter membrane assembly 20, making the surface of the membrane fibers uniformly stressed and avoiding single-point overload.

[0037] Please see Figure 9The first Venturi tube 37 and the second Venturi tube 44 have the same structure, both including a tapered section 371. The tapered section 371 connects to the pressure-stabilizing section 372, and the pressure-stabilizing section 372 connects to the buffer section 373. The Venturi tube can be modified from a straight channel to a "tapered-expanding" type channel. When the liquid flows to the tapered section 371, its cross-sectional area begins to decrease, and the liquid velocity increases, stretching the 50ms spike pulse into a 200ms trapezoidal wave. This prolongs the stress time of the membrane filaments on the filter membrane assembly 20, causing the peak value to decrease and the shear stress peak value to drop. The pressure-stabilizing section 372 guides the liquid flow. When the high-pressure wave tries to continue to rise, the buffer section 373... The volume acts like an "air spring," instantly absorbing excess kinetic energy and reducing the peak pressure from 0.5 MPa to below 0.35 MPa. Moreover, the buffer section 373 elongates the pulse leading edge by 3-5 times, reducing the peak shear force by 30%, while keeping the total flushing energy constant. The liquid flows into the buffer section 373, forming a vortex dissipation, which makes the gas-water two-phase flow velocity distribution inside the filter membrane module 20 more uniform, avoiding local high shear points and significantly reducing the maximum strain on the membrane fiber surface. Therefore, the Venturi tube design can achieve peak reduction at the pulse leading edge and store energy, maintaining flushing intensity while avoiding instantaneous overload of the membrane fiber.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A quick release air-water pulse membrane cleaning device, characterized in that: Includes a cleaning tank (10), in which a filter membrane assembly (20) is installed and limited, and an upper cleaner (30) connected to the top of the filter membrane assembly (20) is engaged at the top of the cleaning tank (10), and a lower cleaner (40) connected to the bottom of the filter membrane assembly (20) is engaged at the bottom of the cleaning tank (10). The upper cleaner (30) includes an upper water inlet pipe (31), the top end of which is connected to a mixing chamber (32), the mixing chamber (32) is connected to an air inlet pipe (33) and a cleaning pipe (34), the upper water inlet pipe (31) is equipped with a first three-way valve (35), the first three-way valve (35) is equipped with an upper drain pipe (36), the bottom end of the upper water inlet pipe (31) is connected to a first venturi tube (37), and the bottom end of the first venturi tube (37) is connected to a first threaded connector (38).

2. The quick release air and water pulse membrane cleaning device of claim 1, wherein: The lower cleaner (40) has the same basic structure as the upper cleaner (30), including a lower water inlet pipe (41), a second three-way valve (42) is mounted on the lower water inlet pipe (41), a lower drain pipe (43) is mounted on the second three-way valve (42), a second venturi tube (44) is connected to the top of the lower water inlet pipe (41), and a second screw connector (45) is connected to the top of the second venturi tube (44).

3. The quick release air and water pulse membrane cleaning device of claim 2, wherein: The upper cleaner (30) also includes a sealing ring (39) fixedly sleeved on the outer wall of the first screw joint (38), and the first screw joint (38) is rotatably assembled at the bottom end of the first venturi tube (37) through a bearing. The second screw joint (45) is fixedly connected to the second venturi tube (44), and a bubble equalization plate (50) is fixedly assembled inside the first screw joint (38) and the second screw joint (45).

4. The quick release air and water pulse membrane cleaning device of claim 3, wherein: The first Venturi tube (37) and the second Venturi tube (44) have the same structure, both including a tapered section (371), the tapered section (371) is connected to the voltage stabilizing section (372), and the voltage stabilizing section (372) is connected to the buffer section (373).

5. The quick release air and water pulse membrane cleaning device of claim 4, wherein: The filter membrane assembly (20) is provided with a limiting ring (21) at the top, and an inlet connection end (22) is integrally formed at the middle of the top of the limiting ring (21). The filter membrane assembly (20) is provided with an outlet connection end (23) at the bottom, and water guiding channels (24) are evenly opened on the outlet connection end (23).

6. The quick release air and water pulse membrane cleaning device of claim 5, wherein: The top of the cleaning tub (10) is magnetically fitted with a top cover (11). The top center of the top cover (11) has an installation hole (12) that matches the sealing ring (39). A support rod (13) is fixed on the inner side wall of the cleaning tub (10). A limit seat (14) is fixed at the end of the support rod (13).

7. The quick release air and water pulse membrane cleaning device of claim 6, wherein: The limiting seat (14) consists of four sets, which are combined to form a limiting structure that is sleeved on the outside of the limiting ring (21), and each set of limiting seat (14) has an arc-shaped groove on the top that matches the limiting ring (21).

8. The quick release air and water pulse membrane cleaning device of claim 6, wherein: The first screw connector (38) is threaded onto the water inlet connection end (22), and the second screw connector (45) is threaded onto the water outlet connection end (23).

Images