An automatic cleaning device for ultrafiltration system

Abstract

The utility model relates to an automatic cleaning device technical field of ultrafiltration system, especially to an automatic cleaning device of ultrafiltration system, including the shell, the inside embedding fixed of shell has ultrafiltration membrane, the upper end assembly of shell is provided with the apron, the inside embedding fixed of apron has sealed bearing no.

Description

Technical Field

[0001] This utility model relates to the technical field of an automatic cleaning device for an ultrafiltration system, and more particularly to an automatic cleaning device for an ultrafiltration system. Background Technology

[0002] Ultrafiltration technology, as one of the core processes in modern water treatment systems, is widely used in industries with extremely high water quality requirements, such as photovoltaics, electronics, pharmaceuticals, and chemicals. Ultrafiltration systems effectively remove suspended solids, colloids, bacteria, and large organic molecules from water through physical sieving, making it a crucial step in the production of pure and ultrapure water. However, ultrafiltration membranes inevitably become fouled during long-term operation, leading to decreased membrane flux and increased transmembrane pressure, severely impacting water production efficiency and system stability. Therefore, regular cleaning of the ultrafiltration membrane is essential to maintain its performance. Common cleaning methods include forward flushing, backwashing, air-water backwashing, and maintenance chemical cleaning. These cleaning steps are usually performed sequentially, requiring valve switching to control the water flow direction, pressure, and medium to effectively remove contaminants from the membrane surface and pores.

[0003] While existing ultrafiltration systems have achieved initial automation of valve control during the cleaning process, their level of automation is limited. The backwashing stage, in particular, still relies heavily on manual operation. A typical ultrafiltration system operation flow includes: filter preparation, filtration, air-water backwashing, water backwashing, discharge, forward flushing, and finally returning to filtration. In this process, the valves after the backwash pump are mostly manual butterfly valves, requiring manual operation based on system prompts or timed schedules. This operation mode not only increases the labor intensity of personnel but also leads to delayed backwashing initiation due to human response delays, significantly reducing the cleaning effect and failing to completely remove membrane fouling. This results in insufficient membrane flux recovery and a continuous decline in system permeate efficiency. Furthermore, manual operation carries the risk of misoperation; for example, incorrect valve opening and closing sequences can lead to air-water cross-contamination, pressure fluctuations, and other safety issues, further affecting the stable operation of the system.

[0004] In the existing technology, the manual operation of the valves after the backwash pump has become a bottleneck for system automation. On the one hand, frequent manual intervention not only consumes human resources but also increases operation and maintenance costs. On the other hand, the response delay caused by human factors directly compresses the effective water production time and reduces the economic efficiency of the entire unit. Especially in continuous production scenarios, untimely cleaning will accelerate membrane aging, shorten membrane life, and bring higher replacement costs and downtime losses. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned shortcomings in the existing technology by proposing an automatic cleaning device for an ultrafiltration system.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an automatic cleaning device for an ultrafiltration system, comprising a housing, an ultrafiltration membrane embedded and fixed inside the housing, a cover plate mounted on the upper end of the housing, a sealing bearing embedded and fixed inside the cover plate, and a central tube interference fit through the inner ring wall of the sealing bearing.

[0007] A flow divider is fixedly installed at the lower end of the central tube. The flow divider has an inner cavity. The lower end of the central tube is connected to the inner cavity. Several high-pressure nozzles are fixedly distributed at the lower end of the flow divider.

[0008] A linkage bevel gear is fixedly sleeved on the outer end of the central tube. A motor is fixedly installed on the upper end of the cover plate by a bracket. The motor has a drive shaft inside, and a drive bevel gear is fixedly installed on the end of the shaft. The drive bevel gear and the linkage bevel gear are meshed with each other.

[0009] Preferably, a second sealed bearing is provided at the upper end of the central tube, the outer ring wall of the second sealed bearing is welded and fixed to the end face of the central tube, and a transition interface is installed on the inner ring wall of the second sealed bearing with an interference fit.

[0010] Preferably, the upper flange of the transition interface is connected to a backwashing interface, and a solenoid valve is provided on the surface of the backwashing interface. The valve core of the solenoid valve is embedded in the upper end of the backwashing interface. The outer ring wall of the transition interface and the outer ring wall of the backwashing interface are both fixedly installed by brackets and cover plates.

[0011] Preferably, a plurality of dosing ports are sequentially distributed on the side wall of the backwashing port, and a second solenoid valve is provided on the surface of the dosing port, the valve core of the second solenoid valve being embedded inside the dosing port.

[0012] Preferably, an air inlet is fixed through one side of the cover plate, the lower end of the air inlet is located three centimeters above the ultrafiltration membrane, and a solenoid valve three is provided on the surface of the air inlet, with the valve core of the solenoid valve three embedded inside the air inlet.

[0013] Preferably, a feed port is fixedly provided through the lower end of the side wall of the outer shell, and a solenoid valve four is provided on the feed port, with the valve core of the solenoid valve four embedded inside the feed port.

[0014] Preferably, a waste discharge port is fixedly installed at the lower end of the outer shell, and a solenoid valve five is provided on the waste discharge port, with the valve core of the solenoid valve five embedded inside the waste discharge port.

[0015] Preferably, a discharge port for discharging filtered material is fixed through the middle of the side wall of the outer shell. The discharge port is located above the ultrafiltration membrane, and the lower end of the air inlet is located between the ultrafiltration membrane and the discharge port. A solenoid valve six is ​​provided on the discharge port, and the valve core of the solenoid valve six is ​​embedded inside the discharge port.

[0016] The design scheme proposed in this utility model has the following beneficial effects in application:

[0017] 1. This solution achieves all-round and efficient cleaning of ultrafiltration membranes through the design of a rotating high-pressure nozzle. The central tube drives the distributor and high-pressure nozzle to rotate inside the ultrafiltration membrane, so that the cleaning solution can be evenly covered on the entire membrane surface in the form of atomization, effectively penetrating the microporous structure and thoroughly removing attached contaminants.

[0018] 2. As described in 1, the integrated multi-channel chemical dosing and pneumatic-assisted cleaning functions further enhance the cleaning effect. Users can select acidic, alkaline, or neutral cleaning agents according to the type of contamination. The dosing process is automatically controlled by a solenoid valve to achieve precise cleaning. At the same time, the air inlet can release high-pressure gas in the liquid layer, generating a large number of bubbles to physically flush the membrane surface. Combined with the synergistic effect of chemical agents, it effectively decomposes stubborn dirt and improves cleaning efficiency.

[0019] 3. As described in section 2, the integration of automatic control and process significantly improves operational convenience and the stability of the cleaning process. Through centralized control of processes such as feeding, backwashing, chemical dosing, air intake, and waste discharge via solenoid valves, users can flexibly set cleaning programs, reduce manual intervention, and avoid operational errors. At the same time, the closed structure design takes into account both sealing and functionality, preventing leakage risks and ensuring orderly connection of each link. It is suitable for efficient cleaning and maintenance in continuous production environments, providing a reliable guarantee for the stable operation of the ultrafiltration system. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a top view of the overall structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the internal structure of the present invention;

[0023] Figure 4 This is a partially enlarged schematic diagram of the central tube, transition interface, and backwash interface of this utility model;

[0024] Figure 5 This is a schematic diagram of the flow divider and high-pressure nozzle structure of this utility model.

[0025] In the diagram: 1. Outer shell; 11. Ultrafiltration membrane; 12. Cover plate; 13. Sealed bearing one; 14. Central tube; 15. Diverter; 16. Inner cavity; 17. High-pressure nozzle; 18. Linkage bevel gear; 19. Motor; 110. Drive bevel gear; 2. Sealed bearing two; 21. Transition interface; 22. Backwash interface; 201. Dosing interface; 202. Solenoid valve two; 3. Air inlet interface; 31. Solenoid valve three; 4. Feed inlet interface; 41. Solenoid valve four; 42. Waste discharge interface; 43. Solenoid valve five; 44. Discharge interface; 45. Solenoid valve six. Detailed Implementation

[0026] 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.

[0027] Example 1

[0028] Reference Figures 1-5 An automatic cleaning device for an ultrafiltration system includes a housing 1, an ultrafiltration membrane 11 is embedded and fixed inside the housing 1, a cover plate 12 is mounted on the upper end of the housing 1, a sealed bearing 13 is embedded and fixed inside the cover plate 12, a central tube 14 is interference-fitted and penetrated on the inner ring wall of the sealed bearing 13, the central tube 14 can rotate based on the sealed bearing 13, and the cover plate 12 can close the upper end of the housing 1.

[0029] A distributor 15 is fixedly installed at the lower end of the central tube 14. The distributor 15 has an inner cavity 16. The lower end of the central tube 14 is connected to the inner cavity 16. Several high-pressure nozzles 17 are fixedly distributed at the lower end of the distributor 15. When the central tube 14 rotates, the liquid can enter the distributor 15 after entering the central tube 14. The distributor 15 can rotate synchronously with the central tube 14, so that the liquid sprayed by the high-pressure nozzles 17 can fully cover the ultrafiltration membrane 11 under the action of rotation and stably fill it with gas. The high-pressure nozzles 17 are atomizing type and can effectively contact and spray with the micropores of the ultrafiltration membrane 11. The ultrafiltration membrane 11 can filter the material from bottom to top during filtration.

[0030] A linkage bevel gear 18 is fixedly sleeved on the outer end of the central tube 14. A motor 19 is fixedly installed on the upper end of the cover plate 12 via a bracket. The motor 19 has a drive shaft inside, and a drive bevel gear 110 is fixedly installed on the end of the shaft. The drive bevel gear 110 and the linkage bevel gear 18 are meshed with each other. When the central tube 14 needs to be rotated, the power supply of the motor 19 is turned on, so that the motor 19 can make the shaft rotate and make the drive bevel gear 110 rotate. In this way, the linkage bevel gear 18 can be driven to rotate synchronously, thereby realizing the stable rotation drive of the central tube 14.

[0031] The upper end of the central tube 14 is provided with a sealed bearing 2. The outer ring wall of the sealed bearing 2 is welded and fixed to the end face of the central tube 14. The inner ring wall of the sealed bearing 2 is fitted with a transition interface 21. The sealed bearing 2 can play a rotating support role, so that the central tube 14 can also be connected to the transition interface 21 for liquid transportation when rotating.

[0032] The upper flange of the transition interface 21 is connected to the backwash interface 22. The surface of the backwash interface 22 is equipped with a solenoid valve 23. The valve core of the solenoid valve 23 is embedded in the upper end of the backwash interface 22. The outer ring wall of the transition interface 21 and the outer ring wall of the backwash interface 22 are fixedly installed by the bracket and the cover plate 12. The backwash interface 22 can be connected to an external backwash pump, thereby ensuring the delivery pressure of the inlet liquid. The solenoid valve 23 can electrically control the backwash interface 22, which is more automated and convenient than traditional manual control.

[0033] Among them, several dosing ports 201 are sequentially distributed on the side wall of the backwashing port 22. A solenoid valve 202 is provided on the surface of the dosing port 201. The valve core of the solenoid valve 202 is embedded inside the dosing port 201. The several dosing ports 201 can be acidic chemical solution delivery ports, alkaline chemical solution delivery ports, neutral chemical solution delivery ports, etc. The cleaning effect of the ultrafiltration membrane 11 can be improved by the auxiliary cleaning of the chemical solution. The solenoid valve 202 can electrically control the corresponding dosing port 201.

[0034] One side of the cover plate 12 is fixed with an air inlet 3. The lower end of the air inlet 3 is located three centimeters above the ultrafiltration membrane 11. A solenoid valve 31 is installed on the surface of the air inlet 3. The valve core of the solenoid valve 31 is embedded inside the air inlet 3. When cleaning the ultrafiltration membrane 11, the cleaning solution is first added to the air inlet 3 and overflows the ultrafiltration membrane 11 and the lower end of the air inlet 3. During the soaking and cleaning, air is delivered through the air pump connected to the air inlet 3, so that the air inlet 3 can deliver high-pressure gas into the liquid to achieve a bubble effect. Through the continuous fluctuation of the bubbles, the ultrafiltration membrane 11 can be further cleaned efficiently. The solenoid valve 31 can be electrically controlled to control the air inlet 3.

[0035] The lower end of the side wall of the outer shell 1 is fixed with a feed port 4. A solenoid valve 41 is installed on the feed port 4. The valve core of the solenoid valve 41 is embedded inside the feed port 4. The feed port 4 can transport the filtered liquid. The solenoid valve 41 can electrically control the feed port 4.

[0036] The lower end of the outer shell 1 is fixed with a waste discharge port 42. A solenoid valve 43 is installed on the waste discharge port 42. The valve core of the solenoid valve 43 is embedded inside the waste discharge port 42. The waste discharge port 42 can discharge the cleaning waste liquid when backwashing the ultrafiltration membrane 11. The solenoid valve 43 can electrically control the waste discharge port 42.

[0037] The outer casing 1 has a discharge port 44 fixed through the middle of its side wall for discharging filtered liquid. The discharge port 44 is located above the ultrafiltration membrane 11, and the lower end of the air inlet 3 is located between the ultrafiltration membrane 11 and the discharge port 44. The discharge port 44 is equipped with a solenoid valve 45, and the valve core of the solenoid valve 45 is embedded inside the discharge port 44. The discharge port 44 can discharge the filtered liquid after the ultrafiltration membrane 11 has filtered the liquid. The solenoid valve 45 can electrically control the discharge port 44.

[0038] In practice

[0039] In this filtration process, the material enters the housing 1 through the feed port 4, and the flow rate is controlled by solenoid valve 41. The material flows from bottom to top and is filtered through the ultrafiltration membrane 11. At this time, the ultrafiltration membrane 11 will trap impurities and allow the filtrate to pass through. The filtered clean liquid continues to rise to the area above the ultrafiltration membrane 11 and is discharged through the discharge port 44. This process is controlled by solenoid valve 45. During filtration, the air inlet port 3 and the backwash port 22 and other related channels are all closed and controlled by their respective solenoid valves to ensure the system's airtightness. After long-term operation, the micropores of the ultrafiltration membrane 11 will gradually be blocked by contaminants. At this time, the cleaning program needs to be started. During cleaning, the system first stops feeding, closes solenoid valve 41 and solenoid valve 45, and opens solenoid valve 43 on the waste discharge port 42 to discharge the residual material and prepare the environment for subsequent cleaning.

[0040] During backwashing and chemically enhanced cleaning, the system is connected to an external high-pressure pump through backwashing interface 22 to inject cleaning liquid. Solenoid valve 23 controls the on / off state. The cleaning liquid enters the central tube 14 through transition interface 21 and sealed bearing 2, maintaining a rotary seal. The lower end of the central tube 14 is connected to a distributor 15, and the cleaning liquid flows into the inner cavity 16 and is sprayed out in atomized form through high-pressure nozzle 17. At the same time, motor 19 starts and drives bevel gear 110 and linkage bevel gear 18 to rotate the central tube 14, so that the high-pressure nozzle 17 can spray the inner surface of the ultrafiltration membrane 11 in full coverage while rotating, effectively removing contaminants in the micropores. If chemically enhanced cleaning is required, acidic, alkaline or neutral chemical solutions are added through chemical dosing interface 201, controlled by solenoid valve 202 respectively. The chemical solution and cleaning liquid are mixed to enhance the cleaning effect. The combination of rotary spraying and chemical action significantly improves the dirt removal efficiency of the ultrafiltration membrane 11.

[0041] During the bubble-assisted cleaning process, the cleaning fluid is first injected into the housing 1 through the backwash port 22 until the liquid level covers the ultrafiltration membrane 11 and is about three centimeters above the lower end of the air inlet port 3. Then, the solenoid valve 31 controls the air inlet port 3 to connect to the external air source and introduce high-pressure gas. The gas forms a large number of bubbles in the liquid. The bubbles generate turbulence and fluctuations during their ascent, which physically scour the surface of the ultrafiltration membrane 11 and further remove stubborn dirt. At the same time, the central tube 14 rotates continuously, driving the distributor 15 and the high-pressure nozzle 17 to spray atomized cleaning fluid. Working together with the bubbles, dynamic all-round cleaning is achieved. After cleaning, the waste liquid is discharged through the waste discharge port 42 and controlled by the solenoid valve 43. The entire cleaning process is automatically managed by the electronic control system. Each solenoid valve opens and closes according to the program to ensure efficient and automated cleaning.

[0042] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An automatic cleaning device for an ultrafiltration system, comprising a housing (1), characterized in that: An ultrafiltration membrane (11) is embedded and fixed inside the outer shell (1). A cover plate (12) is installed at the upper end of the outer shell (1). A sealing bearing (13) is embedded and fixed inside the cover plate (12). A central tube (14) is interference-fitted and penetrates the inner ring wall of the sealing bearing (13). A diverter (15) is fixedly installed at the lower end of the central tube (14). An inner cavity (16) is provided inside the diverter (15). The lower end of the central tube (14) is connected to the interior of the inner cavity (16). Several high-pressure nozzles (17) are distributed and fixed at the lower end of the diverter (15). The outer end of the central tube (14) is fixedly sleeved with a linkage bevel gear (18), and the upper end of the cover plate (12) is fixedly installed with a motor (19) by a bracket. The motor (19) has a drive shaft inside, and a drive bevel gear (110) is fixedly installed at the end of the shaft. The drive bevel gear (110) and the linkage bevel gear (18) are meshed with each other.

2. The automatic cleaning device for an ultrafiltration system according to claim 1, characterized in that: The upper end of the central tube (14) is provided with a sealed bearing 2 (2), the outer ring wall of the sealed bearing 2 (2) is welded and fixed to the end face of the central tube (14), and the inner ring wall of the sealed bearing 2 (2) is fitted with a transition interface (21).

3. The automatic cleaning device for an ultrafiltration system according to claim 2, characterized in that: The upper flange of the transition interface (21) is connected to a backwash interface (22). A solenoid valve (23) is provided on the surface of the backwash interface (22). The valve core of the solenoid valve (23) is embedded in the upper end of the backwash interface (22). The outer ring wall of the transition interface (21) and the outer ring wall of the backwash interface (22) are both fixedly installed by a bracket and a cover plate (12).

4. The automatic cleaning device for an ultrafiltration system according to claim 3, characterized in that: Several dosing ports (201) are sequentially distributed on the side wall of the backwash port (22). A solenoid valve (202) is provided on the surface of the dosing port (201), and the valve core of the solenoid valve (202) is embedded inside the dosing port (201).

5. An automatic cleaning device for an ultrafiltration system according to claim 4, characterized in that: An air inlet (3) is fixed through one side of the cover plate (12). The lower end of the air inlet (3) is located three centimeters above the ultrafiltration membrane (11). A solenoid valve (31) is provided on the surface of the air inlet (3). The valve core of the solenoid valve (31) is embedded inside the air inlet (3).

6. An automatic cleaning device for an ultrafiltration system according to claim 5, characterized in that: The lower end of the side wall of the outer shell (1) is fixed with a feed port (4), and a solenoid valve (41) is provided on the feed port (4). The valve core of the solenoid valve (41) is embedded inside the feed port (4).

7. An automatic cleaning device for an ultrafiltration system according to claim 6, characterized in that: The lower end of the outer shell (1) is fixed with a waste discharge port (42), and a solenoid valve five (43) is provided on the waste discharge port (42). The valve core of the solenoid valve five (43) is embedded inside the waste discharge port (42).

8. An automatic cleaning device for an ultrafiltration system according to claim 7, characterized in that: The outer shell (1) has a discharge port (44) for discharging filtered material through the middle of its side wall. The discharge port (44) is located above the ultrafiltration membrane (11), and the lower end of the air inlet (3) is located between the ultrafiltration membrane (11) and the discharge port (44). A solenoid valve six (45) is provided on the discharge port (44), and the valve core of the solenoid valve six (45) is embedded inside the discharge port (44).

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