A dual-membrane method water reuse device and reuse method

Abstract

The application relates to the technical field of wastewater treatment, and discloses a double-membrane method water reuse device and a reuse method, which comprise a support and an ultrafiltration membrane tank arranged in the support, a reverse osmosis membrane tank fixed in the support, a sedimentation tank fixed in the support, and a water storage tank fixed in the support, further comprising: a tubular ultrafiltration membrane fixed in the ultrafiltration membrane tank; and a tubular reverse osmosis membrane fixed in the reverse osmosis membrane tank. The application can efficiently treat wastewater. When the water to be treated is in a normal working state, a cleaning float is driven to move up and down in the tubular ultrafiltration membrane and the tubular reverse osmosis membrane through water pressure. On one hand, the first cleaning scraper ring, the second cleaning scraper ring and the spiral scraper ring are used to scrape off the retained substances attached to the inner channel wall surface of the tubular ultrafiltration membrane and the tubular reverse osmosis membrane; on the other hand, the retained substances attached to the scraper rings are washed and cleaned by the water flow pressure, and the retained substances are discharged through the spiral drainage channel, so that the cleaning float is self-cleaned.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a dual-membrane method for wastewater reuse and a reuse method. Background Technology

[0002] With the increasing volume of industrial wastewater discharge and the growing severity of water scarcity, reclaimed water technology has become a key means of achieving water resource recycling. The dual-membrane method (ultrafiltration + reverse osmosis), as the mainstream technology in the current reclaimed water field, is widely used in wastewater treatment scenarios in industries such as chemical, power, and municipal engineering due to its high efficiency in removing suspended solids, colloids, organic matter, and soluble salts. This technology removes large molecular impurities and colloidal particles from the water through the sieving action of the ultrafiltration membrane, and then achieves deep purification of small molecular pollutants and ions through the selective permeation of the reverse osmosis membrane, ultimately producing water that meets reuse standards.

[0003] The inner walls of ultrafiltration and reverse osmosis membranes are highly susceptible to fouling due to the trapping of suspended particles, colloidal substances, microbial metabolites, and organic matter in the water. These trapped impurities gradually accumulate on the membrane surface and penetrate into the membrane pores, resulting in a reduction in the effective filtration area and an increase in water permeability resistance. This directly manifests as a significant decrease in filtration flux, and in severe cases, may even require shutdown and replacement of the membrane module, greatly increasing operation and maintenance costs.

[0004] In existing technologies, membrane fouling treatment methods are mainly divided into two categories: offline chemical cleaning and online physical cleaning. However, these methods have limited effectiveness in removing stubborn contaminants deeply attached to the inner wall of the membrane. Especially for the tubular structure of ultrafiltration and reverse osmosis membranes, the curvature of their inner walls leads to uneven water flow, making it easier to remove impurities near the two ends of the membrane tube, while the fouling in the middle area remains difficult to resolve effectively.

[0005] Current technologies lack real-time monitoring and dynamic response mechanisms for membrane fouling levels. Most devices rely on fixed-cycle cleaning, making it difficult to adjust cleaning strategies based on actual fouling conditions: when membrane fouling is mild, indiscriminate cleaning wastes water and energy; while when fouling is severe, delayed cleaning exacerbates membrane performance degradation. Summary of the Invention

[0006] This invention provides a dual-membrane water reuse device to achieve efficient wastewater treatment.

[0007] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows: In a first aspect, a dual-membrane water recycling device includes: a support frame and an ultrafiltration membrane tank disposed within the support frame, wherein a reverse osmosis membrane tank is fixed inside the support frame, a sedimentation tank is fixed inside the support frame, and a water storage tank is fixed inside the support frame; further comprising: A tubular ultrafiltration membrane is fixed inside an ultrafiltration membrane tank; a tubular reverse osmosis membrane is fixed inside a reverse osmosis membrane tank; a cleaning component is slidably installed inside the ultrafiltration membrane tank and the reverse osmosis membrane tank, used to clean the trapped deposits on the inner walls of the tubular ultrafiltration membrane and the tubular reverse osmosis membrane; a conveying component is fixed on the ultrafiltration membrane tank, the reverse osmosis membrane tank, the sedimentation tank, and the water storage tank, respectively, used to control the water flow direction to drive the cleaning component to reciprocate along a predetermined trajectory; The connecting pipes are fixed to both ends of the ultrafiltration membrane tank and both ends of the reverse osmosis membrane tank. The cleaning float is vertically slidably installed inside the connecting pipe, and is also vertically slidably installed inside the tubular ultrafiltration membrane and tubular reverse osmosis membrane, with its upper and lower end faces being inclined; the first cleaning scraper ring is fixed above the cleaning float; the second cleaning scraper ring is fixed below the cleaning float, with its lower end face being inclined; the spiral scraper ring is fixed on the cleaning float, with one end fixed to the first cleaning scraper ring and the other end fixed to the second cleaning scraper ring; The upper and lower end faces of the cleaning pontoon are both inclined. The upper end face of the first cleaning scraper ring is inclined and is adapted to the upper inclined face of the cleaning pontoon. The lower end face of the second cleaning scraper ring is inclined and is adapted to the lower inclined face of the cleaning pontoon. The inner wall of the connecting pipe and the spiral scraper ring together form a spiral drainage channel.

[0008] Furthermore, the cleaning component also includes: A piston hole is formed on the cleaning pontoon; a first dredging hole is formed inside the cleaning pontoon and located above the cleaning pontoon; a second dredging hole is formed inside the cleaning pontoon and located below the cleaning pontoon.

[0009] Furthermore, the cleaning component also includes: A limiting ring is fixed to the piston hole; a first cleaning piston is slidably disposed in the piston hole; a second cleaning piston is slidably disposed in the piston hole and located directly below the first cleaning piston; a spring seat plate is fixed in the piston hole; a cleaning spring is fixed at one end to the first and second cleaning pistons and at the other end to the spring seat plate.

[0010] Furthermore, the bracket is fixed with a docking plate; there are two ultrafiltration membrane tanks, which are located on the same side of the sedimentation tank and the water storage tank; there are two reverse osmosis membrane tanks, which are located on the same side of the sedimentation tank and the water storage tank, and the reverse osmosis membrane tanks are opposite to the ultrafiltration membrane tanks.

[0011] Furthermore, a first water ring channel is provided inside the connecting pipe, which is connected to a first unblocking hole. A first unblocking pipe is fixed on the outside of the connecting pipe. A second water ring channel is provided inside the connecting pipe, which is connected to a second unblocking hole. A second unblocking pipe is fixed on the outside of the connecting pipe.

[0012] Furthermore, the conveying component includes: The main inlet pipe is located above the support; the four-way inlet pipe is fixed above the main inlet pipe and fixed to the connecting pipes above the two ultrafiltration membrane tanks; the first electromagnetic inlet valve is fixed above the main inlet pipe; the three-way inlet pipe has its inlet end fixed below the main inlet pipe and its outlet end fixed to the connecting pipes below the two ultrafiltration membrane tanks respectively; the second electromagnetic inlet valve is fixed below the main inlet pipe; and the first external end cap is threaded onto the main inlet pipe.

[0013] Furthermore, the conveying component also includes: The first sedimentation inlet pipe is fixed at both ends to the connecting pipes above the two ultrafiltration membrane tanks and at both ends to the connecting pipes above the two reverse osmosis membrane tanks, and is connected to the first unblocking pipe; the first drain pipe is fixed at both ends of the first sedimentation inlet pipe; the first solenoid valve is fixed at both ends of the first sedimentation inlet pipe and is fixed to the first drain pipe; the second sedimentation inlet pipe is fixed at both ends of the connecting pipes below the two ultrafiltration membrane tanks and at both ends to the connecting pipes below the two reverse osmosis membrane tanks, and is connected to the second unblocking pipe; the second drain pipe is fixed at both ends of the second drain pipe; the second solenoid valve is fixed at both ends of the second sedimentation inlet pipe and is fixed to the second drain pipe; the sedimentation main pipe is fixed at one end to the first sedimentation inlet pipe and the second sedimentation inlet pipe, and at the other end to the sedimentation tank.

[0014] Furthermore, the conveying component also includes: A water supply pipe is fixed below the water storage tank; a first booster pump has its base fixed below the water storage tank and its working end fixed to the water supply pipe; a first electromagnetic water supply valve is fixed above the water supply pipe; a first water supply tee has its inlet fixed above the water supply pipe and its outlets fixed to the connecting pipes above the two reverse osmosis membrane tanks; a second electromagnetic water supply valve is fixed below the water supply pipe; a second water supply tee has its inlet fixed below the water supply pipe and its outlets fixed to the connecting pipes below the two reverse osmosis membrane tanks.

[0015] Furthermore, the conveying component also includes: The sedimentation return water pipe has one end inserted into the sedimentation tank and the other end fixed to the four-way inlet pipe; the second booster pump has its pump base fixed above the sedimentation tank and its working end fixed to the sedimentation return water pipe; the electromagnetic return water valve is fixed to the sedimentation return water pipe; the sludge discharge pipe is fixed below the sedimentation tank; the electromagnetic sludge valve is fixed to the sludge discharge pipe; the reclaimed water pipe is fixed to the reverse osmosis membrane tank; the second external end cap is threaded onto the reclaimed water pipe; the inlet booster pump has its pump base fixed to the bracket; the flow sensor is fixed to the four-way inlet pipe and the three-way inlet pipe, and fixed to the first supply tee pipe and the second supply tee pipe; the pressure sensor is fixed to the four-way inlet pipe and the three-way inlet pipe, and fixed to the first supply tee pipe and the second supply tee pipe; and the transfer pipe has one end fixed to the middle of the ultrafiltration membrane tank and the other end fixed above the water storage tank.

[0016] Secondly, a water reuse method for a dual-membrane water reuse device, the steps of which are as follows: Step S1: Start the inlet booster pump, open the first electromagnetic inlet valve, and close the second electromagnetic inlet valve. The purified water enters the tubular ultrafiltration membrane of the ultrafiltration membrane tank through the main inlet pipe and the four-way inlet pipe. Under water pressure, some water permeates through the tubular ultrafiltration membrane to form purified water, which then flows into the storage tank through the transfer pipe. The remaining intercepted water pushes the first cleaning piston of the cleaning float to move down and enters the sedimentation tank through the first unblocking hole, the spiral drainage channel, and the second sedimentation inlet pipe. Step S2: Start the first booster pump and open the first electromagnetic water supply valve. The purified water in the water storage tank enters the tubular reverse osmosis membrane of the reverse osmosis membrane tank through the first water supply tee pipe. Some water permeates through the tubular reverse osmosis membrane to form recycled water, which is discharged from the recycled water pipe. The remaining intercepted water enters the sedimentation tank according to the intercepted water path in step S1. Step S3: Open the electromagnetic sludge valve to discharge the sludge at the bottom of the sedimentation tank; start the second booster pump and open the electromagnetic return water valve. The supernatant in the sedimentation tank returns to the four-way inlet pipe under the action of the second booster pump and the sedimentation return water pipe. After mixing with the new water to be treated, repeat steps S1-S2 until the water level in the sedimentation tank is lower than the set value, then close the second booster pump and the electromagnetic return water valve. Step S4: Under normal operating conditions of the water to be treated, the flow attenuation rate of the four-way inlet pipe, the three-way inlet pipe, the first water supply three-way pipe and the second water supply three-way pipe are collected in real time by the flow sensor. Combined with the instantaneous pressure difference fluctuation value of the pressure sensor, a dynamic fouling coefficient is constructed. When the fouling coefficient is >0.75, emergency cleaning is triggered, and the weight is calculated by increasing the flow attenuation rate in real time according to the turbidity of the inlet water. When cleaning the ultrafiltration membrane, the first electromagnetic inlet valve is closed and the second electromagnetic inlet valve is opened. The gray wolf algorithm controls the inlet booster pump to generate a stepped pulse water flow, dynamically matching the upward speed of the cleaning float with the adhesion strength of the trapped material. The first and second electromagnetic inlet valves are automatically opened or closed, causing the water flow direction to switch back and forth, removing deep-seated pollutants. When cleaning the reverse osmosis membrane, the first electromagnetic water supply valve is closed and the second electromagnetic water supply valve is opened. The first booster pump is controlled by the Grey Wolf algorithm to generate a stepped pulse water flow, which drives the cleaning float to move upward inside the tubular reverse osmosis membrane. The first electromagnetic water supply valve and the second electromagnetic water supply valve are automatically opened or closed, so that the water flow direction is switched back and forth to remove deep contaminants. Record the flow-pressure correlation curve and the peak value of the float's movement resistance for each cleaning cycle. Dynamically optimize the water pressure increase and cleaning cycle using the Grey Wolf algorithm. When the float's movement resistance changes abruptly, immediately switch to low power mode and trigger an audible and visual alarm. Terminate the cycle when the cleaning efficiency decreases to 35% of the initial value.

[0017] The above-described solution of the present invention has at least the following beneficial effects: This invention efficiently treats wastewater. When the water to be treated is in normal operating condition, the cleaning float moves up and down inside the tubular ultrafiltration membrane and tubular reverse osmosis membrane by water pressure. On the one hand, the first cleaning scraper ring, the second cleaning scraper ring, and the spiral scraper ring scrape away the trapped material adhering to the inner channel wall of the tubular ultrafiltration membrane and tubular reverse osmosis membrane. On the other hand, the water pressure flushes away the trapped material adhering to each scraper ring. These trapped materials are discharged through the spiral drainage channel, thereby achieving self-cleaning of the cleaning float.

[0018] The dual-membrane self-cleaning control method of this invention uses multi-sensor fusion to monitor the operating status of the membrane module in real time, achieving accurate prediction and dynamic response to fouling. The pulse water flow control technology based on the Grey Wolf algorithm can intelligently adjust hydraulic parameters according to the characteristics of pollutants, so that the movement trajectory of the cleaning float is precisely matched with the pollutant removal requirements, significantly improving the membrane surface cleaning efficiency. The dual-stage water flow switching mechanism, combined with the asymmetric vortex field design, can effectively remove deep pollutants that are difficult to handle by traditional methods, extending the service life of the membrane module. Attached Figure Description

[0019] Figure 1 A three-dimensional structural schematic diagram of a dual-membrane water recycling device provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the support structure of a dual-membrane water recycling device provided in an embodiment of the present invention; Figure 3 A dual-membrane water recycling device provided in this embodiment of the invention Figure 2 Enlarged view of point A; Figure 4 This is a schematic diagram of the structure of an ultrafiltration membrane tank in a dual-membrane water recycling device provided in an embodiment of the present invention; Figure 5 A dual-membrane water recycling device provided in this embodiment of the invention Figure 4 Enlarged view of point B; Figure 6A dual-membrane water recycling device provided in this embodiment of the invention Figure 4 Enlarged view of point C; Figure 7 A dual-membrane water recycling device provided in this embodiment of the invention Figure 4 Enlarged view of point D; Figure 8 This is a schematic diagram of the reverse osmosis membrane tank of a dual-membrane water recycling device provided in an embodiment of the present invention; Figure 9 A dual-membrane water recycling device provided in this embodiment of the invention Figure 8 Enlarged view of point E; Figure 10 This is a schematic diagram of the structure of a tubular ultrafiltration membrane in a dual-membrane water recycling device provided in an embodiment of the present invention; Figure 11 A dual-membrane water recycling device provided in this embodiment of the invention Figure 10 Enlarged view at point F; Figure 12 A dual-membrane water recycling device provided in this embodiment of the invention Figure 10 Enlarged view of point G; Figure 13 This is a cross-sectional view of the cleaning float of a dual-membrane water reuse device provided in an embodiment of the present invention.

[0020] Explanation of reference numerals in the attached figures: In the diagram: 1. Support frame; 101. Connecting plate; 2. Ultrafiltration membrane tank; 3. Reverse osmosis membrane tank; 4. Sedimentation tank; 5. Water storage tank; 6. Tubular ultrafiltration membrane; 7. Tubular reverse osmosis membrane; 8. Cleaning components; 801. Cleaning float; 802. First cleaning scraper ring; 803. Second cleaning scraper ring; 804. Spiral scraper ring; 805. Spiral drainage channel; 806. Piston hole; 807. First unblocking hole; 808. Second unblocking hole; 8 9. Limiting ring; 8010. First cleaning piston; 8011. Second cleaning piston; 8012. Spring seat plate; 8013. Cleaning spring; 9. Conveying component; 901. Main water inlet pipe; 902. Four-way water inlet pipe; 903. First electromagnetic water inlet valve; 904. Three-way water inlet pipe; 905. Second electromagnetic water inlet valve; 906. First external end cap; 907. First sedimentation inlet pipe; 908. First drain pipe; 909. First solenoid valve; 9010, Second sedimentation inlet pipe; 9011, Second drain pipe; 9012, Second solenoid valve; 9013, Sedimentation main pipe; 9014, Water supply pipe; 9015, First booster pump; 9016, First solenoid water supply valve; 9017, First water supply tee pipe; 9018, Second solenoid water supply valve; 9019, Second water supply tee pipe; 9020, Sedimentation return pipe; 9021, Second booster pump; 90 22. Electromagnetic return water valve; 9023. Sludge discharge pipe; 9024. Electromagnetic sludge valve; 9025. Return water pipe; 9026. Second external end cap; 9027. Inlet booster pump; 9028. Flow sensor; 9029. Pressure sensor; 9030. Transfer pipe; 10. Connecting pipe; 1001. First water ring channel; 1002. First dredging pipe; 1003. Second water ring channel; 1004. Second dredging pipe. Detailed Implementation

[0021] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0022] like Figures 1 to 13As shown, an embodiment of the present invention provides a dual-membrane water recycling device, comprising: a support 1 and an ultrafiltration membrane tank 2 disposed within the support 1; a reverse osmosis membrane tank 3 fixed inside the support 1; a sedimentation tank 4 fixed inside the support 1; and a water storage tank 5 fixed inside the support 1. The device also includes: a tubular ultrafiltration membrane 6 fixed inside the ultrafiltration membrane tank 2; a tubular reverse osmosis membrane 7 fixed inside the reverse osmosis membrane tank 3; a cleaning component 8 slidably disposed within the ultrafiltration membrane tank 2 and the reverse osmosis membrane tank 3, used to clean the trapped deposits on the inner walls of the tubular ultrafiltration membrane 6 and the tubular reverse osmosis membrane 7; and a conveying component 9 respectively fixed on the ultrafiltration membrane tank 2, the reverse osmosis membrane tank 3, the sedimentation tank 4, and the water storage tank 5, used to control the water flow direction to drive the cleaning component 8 to reciprocate along a predetermined trajectory.

[0023] The connecting pipe 10 is fixed to both ends of the ultrafiltration membrane tank 2 and the reverse osmosis membrane tank 3; the cleaning float 801 is vertically slidably installed inside the connecting pipe 10, the tubular ultrafiltration membrane 6, and the tubular reverse osmosis membrane 7, with its upper and lower end faces being inclined; the first cleaning scraper ring 802 is fixed above the cleaning float 801; the second cleaning scraper ring 803 is fixed below the cleaning float 801, with its lower end face being inclined; the spiral scraper ring 804 is fixed to the cleaning float 801. On 01, one end is fixed to the first cleaning scraper ring 802, and the other end is fixed to the second cleaning scraper ring 803; the upper and lower end faces of the cleaning float 801 are both inclined, the upper end face of the first cleaning scraper ring 802 is inclined and matches the upper inclined face of the cleaning float 801, and the lower end face of the second cleaning scraper ring 803 is inclined and matches the lower inclined face of the cleaning float 801; the inner wall of the connecting pipe 10 and the spiral scraper ring 804 together form a spiral drainage channel 805.

[0024] The support 1 is fixed with a docking plate 101; there are two ultrafiltration membrane tanks 2, which are located on the same side of the sedimentation tank 4 and the water storage tank 5; there are two reverse osmosis membrane tanks 3, which are located on the same side of the sedimentation tank 4 and the water storage tank 5, and the reverse osmosis membrane tanks 3 and the ultrafiltration membrane tanks 2 are opposite each other; the connecting pipe 10 has a first water ring channel 1001 inside, which is connected to the first unblocking hole 807; a first unblocking pipe 1002 is fixed on the outside of the connecting pipe 10; a second water ring channel 1003 is opened inside the connecting pipe 10, which is connected to the second unblocking hole 808; a second unblocking pipe 1004 is fixed on the outside of the connecting pipe 10.

[0025] Specifically, the reverse osmosis membrane used in this device is a tubular reverse osmosis membrane 7, which is beneficial for cleaning up retained substances. The first booster pump 9015 can increase the water pressure inside the tubular reverse osmosis membrane 7, which facilitates effective filtration by the tubular reverse osmosis membrane 7.

[0026] The sedimentation tank 4 is used to treat the intercepted water by sedimentation. By adding a stirring system and adding a chemical flocculant, the impurities in the sedimentation tank 4 can be promoted to coagulate and form sediment. The sedimentation tank 4 is equipped with an ultrasonic sensor to monitor the thickness of the sediment layer and control its discharge.

[0027] In a preferred embodiment of the present invention, the cleaning component 8 further includes: a piston hole 806, which is formed on the cleaning pontoon 801; a first unblocking hole 807, which is formed inside the cleaning pontoon 801 and located above the cleaning pontoon 801; and a second unblocking hole 808, which is formed inside the cleaning pontoon 801 and located below the cleaning pontoon 801.

[0028] The cleaning component 8 also includes: a limiting ring 809, fixed on the piston hole 806; a first cleaning piston 8010, slidably disposed in the piston hole 806; a second cleaning piston 8011, slidably disposed in the piston hole 806 and located directly below the first cleaning piston 8010; a spring seat plate 8012, fixed in the piston hole 806; and a cleaning spring 8013, one end of which is fixed on the first cleaning piston 8010 and the second cleaning piston 8011, and the other end of which is fixed on the spring seat plate 8012.

[0029] Specifically, the limiting ring 809 is used to limit the position of the first cleaning piston 8010 and the second cleaning piston 8011.

[0030] In a preferred embodiment of the present invention, the conveying component 9 includes: a main water inlet pipe 901, located above the support 1; a four-way water inlet pipe 902, fixed above the main water inlet pipe 901 and fixed on the connecting pipes 10 above the two ultrafiltration membrane tanks 2; a first electromagnetic water inlet valve 903, fixed above the main water inlet pipe 901; a three-way water inlet pipe 904, with its inlet end fixed below the main water inlet pipe 901 and its outlet end fixed on the connecting pipes 10 below the two ultrafiltration membrane tanks 2 respectively; a second electromagnetic water inlet valve 905, fixed below the main water inlet pipe 901; and a first external end cap 906, threadedly connected to the main water inlet pipe 901.

[0031] The conveying component 9 further includes: a first sedimentation inlet pipe 907, both ends of which are fixed to the connecting pipes 10 above the two ultrafiltration membrane tanks 2 and both ends of which are fixed to the connecting pipes 10 above the two reverse osmosis membrane tanks 3, and are connected to the first unblocking pipe 1002; a first drain pipe 908, fixed to both ends of the first sedimentation inlet pipe 907; a first solenoid valve 909, fixed to both ends of the first sedimentation inlet pipe 907 and fixed to the first drain pipe 908; and a second sedimentation inlet pipe 9010, both ends of which are fixed to the two ultrafiltration membrane tanks 2 and 3. The connecting pipe 10 below membrane tank 2 is fixed at both ends to the connecting pipe 10 below the two reverse osmosis membrane tanks 3 and is connected to the second unblocking pipe 1004; the second drain pipe 9011 is fixed at both ends; the second solenoid valve 9012 is fixed at both ends of the second sedimentation inlet pipe 9010 and the second drain pipe 9011; the sedimentation main pipe 9013 is fixed at one end to the first sedimentation inlet pipe 907 and the second sedimentation inlet pipe 9010, and at the other end to the sedimentation tank 4.

[0032] The conveying component 9 also includes: a water supply pipe 9014, fixed below the water storage tank 5; a first booster pump 9015, with its pump base fixed below the water storage tank 5 and its working end fixed on the water supply pipe 9014; a first electromagnetic water supply valve 9016, fixed above the water supply pipe 9014; a first water supply tee pipe 9017, with its inlet fixed above the water supply pipe 9014 and its outlet fixed at both ends on the connecting pipes 10 above the two reverse osmosis membrane tanks 3; a second electromagnetic water supply valve 9018, fixed below the water supply pipe 9014; and a second water supply tee pipe 9019, with its inlet fixed below the water supply pipe 9014 and its outlet fixed at both ends on the connecting pipes 10 below the two reverse osmosis membrane tanks 3.

[0033] The conveying component 9 also includes: a sedimentation return water pipe 9020, one end of which is inserted into the sedimentation tank 4, and the other end is fixed to the four-way inlet pipe 902; a second booster pump 9021, with its base fixed above the sedimentation tank 4 and its working end fixed to the sedimentation return water pipe 9020; an electromagnetic return water valve 9022, fixed to the sedimentation return water pipe 9020; a sludge discharge pipe 9023, fixed below the sedimentation tank 4; an electromagnetic sludge valve 9024, fixed to the sludge discharge pipe 9023; a return water pipe 9025, fixed to the reverse osmosis membrane tank 3; and a second external end cap 9026, threaded. Connected to the return water pipe 9025; the inlet booster pump 9027, with the pump base fixed on the bracket 1; the flow sensor 9028, fixed to the four-way inlet pipe 902 and the three-way inlet pipe 904, and fixed to the first water supply three-way pipe 9017 and the second water supply three-way pipe 9019; the pressure sensor 9029, fixed to the four-way inlet pipe 902 and the three-way inlet pipe 904, and fixed to the first water supply three-way pipe 9017 and the second water supply three-way pipe 9019; the water transfer pipe 9030, with one end fixed in the middle of the ultrafiltration membrane tank 2 and the other end fixed above the water storage tank 5.

[0034] Working principle: A water reuse unit consists of a support 1, two ultrafiltration membrane tanks 2, two reverse osmosis membrane tanks 3, a sedimentation tank 4, and a water storage tank 5. Multiple water reuse units can be set according to water demand. The additional water reuse units are added by removing the first external end cap 906 and the second external end cap 9026 from the inlet water pipe 901 and the return water pipe 9025 and then connecting them. The additional water reuse units are bolted to the docking plate 101 of the two supports 1, so that multiple supports 1 are effectively fixed together. The inlet water pipe 901 is connected to the pipeline of water to be purified and reused, and the return water pipe 9025 is connected to the pipeline of purified water reused. This device consists of three water reuse units.

[0035] During normal operation, the inlet booster pump 9027 is started to draw external water to be purified into the inlet main pipe 901. The water to be purified in the inlet main pipe 901 is then distributed to the three water reuse units. The first electromagnetic inlet valve 903 is opened, while the second electromagnetic inlet valve 905 is closed. The inlet main pipe 901 supplies water to the four-way inlet pipe 902. The electromagnetic return valve 9022 is closed, and the water to be treated enters from the connecting pipe 10 at the top of the ultrafiltration membrane tank 2. The water to be treated then enters the tubular ultrafiltration membrane 6 of the ultrafiltration membrane tank 2 through the connecting pipe 10. After entering the tubular ultrafiltration membrane 6 of the ultrafiltration membrane tank 2, water pressure is formed. Under the action of water pressure, part of the water to be treated passes through the tubular ultrafiltration membrane 6 to complete the first purification, forming purified water. The purified water remains between the inner wall of the ultrafiltration membrane tank 2 and the outer wall of the tubular ultrafiltration membrane 6. Under the action of water pressure, it flows into the water storage tank 5 through the water transfer pipe 9030. The remaining water to be treated is intercepted by the tubular ultrafiltration membrane 6. Water trapped inside the pipe flows downwards along the internal channels of the tubular ultrafiltration membrane 6. During this flow, the cleaning float 801 moves downwards along the internal channels of the tubular ultrafiltration membrane 6 until it enters the connecting pipe 10 below the ultrafiltration membrane tank 2. The water pressure exerted by the trapped water on the cleaning float 801 pushes the first cleaning piston 8010 back into the piston hole 806. The retracted first cleaning piston 8010 compresses the cleaning spring 8013, causing the first unblocking hole 807 to be released from its closed state. The trapped water enters from the piston hole 806 above the cleaning float 801, flows through the first unblocking hole 807 into the spiral drainage channel 805, and then sequentially passes through the second water ring channel 1003, the second unblocking pipe 1004, the second sedimentation inlet pipe 9010, and the sedimentation main pipe 9013 into the sedimentation tank 4 for sedimentation. The second solenoid valve 9012 of the second sedimentation inlet pipe 9010 is in the open state.

[0036] The first booster pump 9015 is started. The first booster pump 9015 draws purified water from the water storage tank 5 through the water supply pipe 9014 and delivers it to the first water supply tee pipe 9017. The first electromagnetic water supply valve 9016 is in the open state. The purified water enters the tubular reverse osmosis membrane 7 inside the reverse osmosis membrane tank 3 through the connecting pipe 10 above the first water supply tee pipe 9017. Under pressure, part of the purified water permeates through the tubular reverse osmosis membrane 7 and forms recycled water between the inner wall of the reverse osmosis membrane tank 3 and the outer wall of the tubular reverse osmosis membrane 7. The recycled water is discharged from the system through the recycled water pipe 9025. The remaining intercepted water is treated in the same way as the intercepted water of the tubular ultrafiltration membrane 6. It passes through the second unblocking pipe 1004, the second sedimentation inlet pipe 9010 and the sedimentation main pipe 9013 in sequence, and finally enters the sedimentation tank 4 for sedimentation treatment. The second electromagnetic valve 9012 on the second sedimentation inlet pipe 9010 at the reverse osmosis membrane tank 3 is kept in the open state.

[0037] Before the intercepted water in the sedimentation tank 4 is subjected to secondary circulation filtration, the electromagnetic sludge valve 9024 is opened to allow the sediment at the bottom of the sedimentation tank 4 to be discharged through the sludge discharge pipe 9023, and the remaining intercepted water without sediment enters the circulation stage; the second booster pump 9021 is started and the electromagnetic return water valve 9022 is opened. The second booster pump 9021 draws the intercepted water through the sedimentation return water pipe 9020 and delivers it to the four-way inlet pipe 902; the inlet booster pump 9027 appropriately reduces the inflow of new water to be treated. The inlet booster pump 9027 and the second booster pump 9021 work together to maintain stable water pressure in the ultrafiltration membrane tank 2 and the tubular ultrafiltration membrane 6; after the intercepted water and the water to be treated are mixed, the above water reuse process is repeated until the water level in the sedimentation tank 4 drops below the set value, at which point the second booster pump 9021 and the electromagnetic return water valve 9022 are automatically shut off.

[0038] When cleaning the residues on the dual membranes, due to the long-term operation of this device, residues will adhere to the internal channel walls of the tubular ultrafiltration membrane 6 and the tubular reverse osmosis membrane 7, resulting in a decrease in filtration efficiency. It is necessary to clean the residues attached to the tubular ultrafiltration membrane 6 and the tubular reverse osmosis membrane 7. The method for cleaning the residues on the internal channel walls of the tubular ultrafiltration membrane 6 and the tubular reverse osmosis membrane 7 is the same.

[0039] Close the first electromagnetic inlet valve 903 on the main inlet pipe 901 and open the second electromagnetic inlet valve 905; the water to be treated enters the tubular ultrafiltration membrane 6 through the three-way inlet pipe 904 from the connecting pipe 10 below the ultrafiltration membrane tank 2. The water pressure pushes the cleaning float 801 upward, and the water to be treated above the cleaning float 801 permeates through the membrane under pressure and is converted into purified water; during the upward movement of the cleaning float 801, the first cleaning scraper ring 802 and the spiral scraper ring 804 on the cleaning float 801 sequentially clean the debris attached to the inner wall of the tubular ultrafiltration membrane 6. The residue is scraped off until the cleaning float 801 reaches the connecting pipe 10 at the top of the ultrafiltration membrane tank 2; then the valve states are switched, the first electromagnetic water inlet valve 903 is opened and the second electromagnetic water inlet valve 905 is closed, and the cleaning float 801 moves downward under the action of reverse water flow. During the downward movement, the second cleaning scraper ring 803 and the spiral scraper ring 804 scrape the inner wall again; by periodically switching the opening and closing states of the two valves, the cleaning float 801 is driven by water pressure to reciprocate, so as to achieve continuous cleaning of the residue trapped on the inner wall of the tubular ultrafiltration membrane 6.

[0040] When the cleaning float 801 completes its final upward movement and stops in the connecting pipe 10 above the ultrafiltration membrane tank 2, the intercepted water from the tubular ultrafiltration membrane 6 pushes the second cleaning piston 8011 back into the piston hole 806. The intercepted water flows through the piston hole 806 into the second unblocking hole 808 and the spiral drainage channel 805, carrying the intercepted material scraped off by the second cleaning scraper ring 803 into the spiral drainage channel 805. The water carrying the intercepted material flows through the first water ring channel 1001, the first unblocking pipe 1002, and the first sedimentation inlet pipe 907 in sequence. At this time, the first solenoid valve 909 on the first sedimentation inlet pipe 907 is closed, and the first solenoid valve 909 on the first drain pipe 908 is opened, allowing the intercepted material to be discharged through the first drain pipe 908. After the discharge is completed, the first solenoid valve 909 is closed to complete the cleaning process.

[0041] When the cleaning float 801 moves down for the last time, it needs to stay in the connecting pipe 10 below the ultrafiltration membrane tank 2 for a certain period of time; the intercepted water of the tubular ultrafiltration membrane 6 pushes the first cleaning piston 8010 to retract into the piston hole 806, and the intercepted water flows through the piston hole 806, the second unblocking hole 808, the spiral drainage channel 805, the second water ring channel 1003 and the second unblocking pipe 1004 in sequence, and is finally transported to the second sedimentation inlet pipe 9010; the second solenoid valve 9012 on the second sedimentation inlet pipe 9010 is closed, and the second solenoid valve 9012 on the second drain pipe 9011 is opened, so that the sediment is discharged from the second drain pipe 9011.

[0042] When cleaning the deposits attached to the tubular reverse osmosis membrane 7, the water pressure and flow direction are controlled by switching the first electromagnetic inlet valve 903 and the second electromagnetic inlet valve 905 back and forth. The cleaning method of the tubular reverse osmosis membrane 7 is the same as that of the tubular ultrafiltration membrane 6.

[0043] Throughout the process, the water to be treated is in normal working condition. Water pressure drives the cleaning float 801 to move up and down inside the tubular ultrafiltration membrane 6 and the tubular reverse osmosis membrane 7. On the one hand, the first cleaning scraper ring 802, the second cleaning scraper ring 803, and the spiral scraper ring 804 scrape away the trapped material attached to the inner channel wall of the tubular ultrafiltration membrane 6 and the tubular reverse osmosis membrane 7. On the other hand, the water pressure flushes away the trapped material attached to each scraper ring. These trapped materials are discharged through the spiral drainage channel 805, thereby achieving self-cleaning of the cleaning float 801.

[0044] The tubular ultrafiltration membrane 6 and tubular reverse osmosis membrane 7 can be removed by disassembling the connecting bolts of the ultrafiltration membrane tank 2, the reverse osmosis membrane tank 3 and the connecting pipe 10, and then cleaned or replaced with chemicals.

[0045] A water reuse method for a dual-membrane water reuse device includes the following steps: Step S1: Start the inlet booster pump 9027, open the first electromagnetic inlet valve 903, and close the second electromagnetic inlet valve 905. The purified water enters the tubular ultrafiltration membrane 6 of the ultrafiltration membrane tank 2 through the main inlet pipe 901 and the four-way inlet pipe 902. Under the action of water pressure, some water passes through the tubular ultrafiltration membrane 6 to form purified water, which then flows into the storage tank 5 through the transfer pipe 9030. The remaining intercepted water pushes the first cleaning piston 8010 of the cleaning float 801 to move down and enters the sedimentation tank 4 through the first unblocking hole 807, the spiral drainage channel 805 and the second sedimentation inlet pipe 9010. Step S2: Start the first booster pump 9015 and open the first electromagnetic water supply valve 9016. The purified water in the water storage tank 5 enters the tubular reverse osmosis membrane 7 of the reverse osmosis membrane tank 3 through the first water supply tee pipe 9017. Some water permeates through the tubular reverse osmosis membrane 7 to form recycled water, which is discharged from the recycled water pipe 9025. The remaining intercepted water enters the sedimentation tank 4 according to the intercepted water path in step S1. Step S3: Open the electromagnetic sludge valve 9024 to discharge the sludge at the bottom of the sedimentation tank 4; start the second booster pump 9021 and open the electromagnetic return water valve 9022. The supernatant in the sedimentation tank 4 returns to the four-way inlet pipe 902 under the action of the second booster pump 9021 and the sedimentation return water pipe 9020. After mixing with the new water to be treated, repeat steps S1-S2 until the water level in the sedimentation tank 4 is lower than the set value, then close the second booster pump 9021 and the electromagnetic return water valve 9022. Step S4: Under normal operating conditions of the water to be treated, the flow attenuation rate of the four-way inlet pipe 902, the three-way inlet pipe 904, the first water supply three-way pipe 9017, and the second water supply three-way pipe 9019 are collected in real time by the flow sensor 9028. Combined with the instantaneous pressure difference fluctuation value of the pressure sensor 9029, a dynamic fouling coefficient is constructed. When the fouling coefficient is >0.75, emergency cleaning is triggered, and the weight is calculated by increasing the flow attenuation rate in real time according to the turbidity of the inlet water. During ultrafiltration membrane cleaning, the first electromagnetic inlet valve 903 is closed and the second electromagnetic inlet valve 905 is opened. The inlet booster pump 9027 is controlled by the Grey Wolf algorithm to generate a stepped pulse water flow, dynamically matching the upward speed of the cleaning float 801 with the adhesion strength of the trapped material. The first electromagnetic inlet valve 903 and the second electromagnetic inlet valve 905 are automatically opened or closed, causing the water flow direction to switch back and forth, removing deep-seated pollutants. During reverse osmosis membrane cleaning, the first electromagnetic water supply valve 9016 is closed and the second electromagnetic water supply valve 9018 is opened. The first booster pump 9015 is controlled by the Grey Wolf algorithm to generate a stepped pulse water flow, which drives the cleaning float 801 to move upward inside the tubular reverse osmosis membrane 7. The first electromagnetic water supply valve 9016 and the second electromagnetic water supply valve 9018 are automatically opened or closed to switch the water flow direction back and forth, removing deep contaminants. Record the flow-pressure correlation curve and the peak value of the float's movement resistance for each cleaning cycle. Dynamically optimize the water pressure increase and cleaning cycle using the Grey Wolf algorithm. When the float's movement resistance changes abruptly, immediately switch to low power mode and trigger an audible and visual alarm. Terminate the cycle when the cleaning efficiency decreases to 35% of the initial value.

[0046] In step S4, under normal operating conditions of the water to be treated, flow data is collected in real time by flow sensors 9028 distributed in the four-way inlet pipe 902, three-way inlet pipe 904, first water supply three-way pipe 9017, and second water supply three-way pipe 9019. Combined with the instantaneous pressure difference fluctuation value obtained by the pressure sensor 9029, a dynamic fouling coefficient mathematical model is constructed. The dynamic fouling coefficient mathematical model is based on the multi-source data fusion technology of the Grey Wolf optimization algorithm, which nonlinearly weights the flow attenuation rate and the pressure difference fluctuation value. When the fouling coefficient exceeds the 0.75 threshold, an emergency cleaning procedure is triggered. The system synchronously connects to the inlet water turbidity sensor and dynamically adjusts the calculation weight of the flow attenuation rate according to the real-time turbidity value, which can increase the calculation weight by up to 40%, realizing intelligent prediction in the pretreatment stage.

[0047] The ultrafiltration membrane cleaning process employs a two-stage hydrodynamic coordinated control: First, in the driving stage, the first electromagnetic inlet valve 903 is closed and the second electromagnetic inlet valve 905 is opened. The gray wolf algorithm controls the inlet booster pump 9027 to generate a stepped pulse water flow with a frequency range of 0.5 to 3 Hz. The frequency, amplitude, and duration of the stepped pulse water flow are dynamically adjusted according to the real-time calculated adhesion strength of the trapped material to ensure optimal matching between the upward speed of the cleaning float 801 and the pollutant removal rate. When entering the encirclement stage, the system automatically opens or closes the first electromagnetic inlet valve 903 and the second electromagnetic inlet valve 905, causing the water flow direction to switch back and forth to remove deep-seated pollutants.

[0048] The reverse osmosis membrane cleaning adopts a two-stage control strategy similar to that of the ultrafiltration membrane. The first electromagnetic water supply valve 9016 is closed and the second electromagnetic water supply valve 9018 is opened. The first booster pump 9015 is controlled by the Grey Wolf algorithm to generate a stepped pulse water flow to drive the cleaning float 801 to move upward inside the tubular reverse osmosis membrane 7. In the reverse water flow stage, the system dynamically adjusts the pressure parameters of the first booster pump 9015 based on the historical cleaning database and the Grey Wolf algorithm, and automatically opens or closes the first electromagnetic water supply valve 9016 and the second electromagnetic water supply valve 9018 to switch the water flow direction back and forth, thus removing deep contaminants.

[0049] The system's built-in dynamic parameter self-learning mechanism continuously records the flow-pressure correlation curve and peak data of the movement resistance of the cleaning float 801 during each cleaning process by establishing a hunting memory database. Utilizing the global optimization capability of the Grey Wolf algorithm, the system can automatically optimize the water pressure increase range from 10% to 25% of the baseline value. At the same time, it intelligently adjusts the cleaning cycle based on the rate of change of the fouling coefficient, with a minimum of 4 hours and a maximum of 15 hours. When the movement resistance of the cleaning float 801 suddenly exceeds the preset threshold, the system immediately triggers a three-level emergency response: first, it switches to a low-power operation mode, simultaneously activates the audible and visual alarm system, and sends an abnormal alarm to maintenance personnel via the GPRS module. The cleaning efficiency assessment uses the second derivative analysis technology of the sewage flow curve. When the cleaning efficiency is detected to have decreased to 35% of the initial value, the current cleaning cycle is automatically terminated to avoid ineffective energy consumption.

[0050] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A dual-membrane water recycling device, comprising: A support frame and an ultrafiltration membrane tank disposed within the support frame, wherein a reverse osmosis membrane tank is fixed inside the support frame, a sedimentation tank is fixed inside the support frame, and a water storage tank is fixed inside the support frame, characterized in that it further comprises: A tubular ultrafiltration membrane is fixed inside an ultrafiltration membrane tank; a tubular reverse osmosis membrane is fixed inside a reverse osmosis membrane tank; a cleaning component is slidably installed inside the ultrafiltration membrane tank and the reverse osmosis membrane tank, used to clean the trapped deposits on the inner walls of the tubular ultrafiltration membrane and the tubular reverse osmosis membrane; a conveying component is fixed on the ultrafiltration membrane tank, the reverse osmosis membrane tank, the sedimentation tank, and the water storage tank, respectively, used to control the water flow direction to drive the cleaning component to reciprocate along a predetermined trajectory; The connecting pipes are fixed to both ends of the ultrafiltration membrane tank and both ends of the reverse osmosis membrane tank. The cleaning float is vertically slidably installed inside the connecting pipe, and is also vertically slidably installed inside the tubular ultrafiltration membrane and tubular reverse osmosis membrane, with its upper and lower end faces being inclined; the first cleaning scraper ring is fixed above the cleaning float; the second cleaning scraper ring is fixed below the cleaning float, with its lower end face being inclined; the spiral scraper ring is fixed on the cleaning float, with one end fixed to the first cleaning scraper ring and the other end fixed to the second cleaning scraper ring; The upper and lower end faces of the cleaning pontoon are both inclined. The upper end face of the first cleaning scraper ring is inclined and is adapted to the upper inclined face of the cleaning pontoon. The lower end face of the second cleaning scraper ring is inclined and is adapted to the lower inclined face of the cleaning pontoon. The inner wall of the connecting pipe and the spiral scraper ring together form a spiral drainage channel; The cleaning component further includes: a piston hole, formed on the cleaning pontoon; a first unblocking hole, formed inside the cleaning pontoon and located above the cleaning pontoon; and a second unblocking hole, formed inside the cleaning pontoon and located below the cleaning pontoon. The connecting pipe has a first water ring channel inside, which is connected to a first unblocking hole. A first unblocking pipe is fixed to the outside of the connecting pipe. The connecting pipe has a second water ring channel inside, which is connected to a second unblocking hole. A second unblocking pipe is fixed to the outside of the connecting pipe. The conveying components include: a first sedimentation inlet pipe, both ends of which are fixed to the connecting pipes above the two ultrafiltration membrane tanks, and both ends of which are fixed to the connecting pipes above the two reverse osmosis membrane tanks, and are connected to a first unblocking pipe; a first drain pipe, fixed to both ends of the first sedimentation inlet pipe; a first solenoid valve, fixed to both ends of the first sedimentation inlet pipe and fixed to the first drain pipe; a second sedimentation inlet pipe, both ends of which are fixed to the connecting pipes below the two ultrafiltration membrane tanks, and both ends of which are fixed to the connecting pipes below the two reverse osmosis membrane tanks, and are connected to a second unblocking pipe; a second drain pipe, fixed to both ends of the second drain pipe; a second solenoid valve, fixed to both ends of the second sedimentation inlet pipe and fixed to the second drain pipe; and a sedimentation main pipe, one end of which is fixed to the first sedimentation inlet pipe and the second sedimentation inlet pipe, and the other end of which is fixed to the sedimentation tank.

2. The dual-membrane water recycling device according to claim 1, characterized in that, The cleaning component also includes: A limiting ring is fixed to the piston hole; a first cleaning piston is slidably disposed in the piston hole; a second cleaning piston is slidably disposed in the piston hole and located directly below the first cleaning piston; a spring seat plate is fixed in the piston hole; a cleaning spring is fixed at one end to the first and second cleaning pistons and at the other end to the spring seat plate.

3. The dual-membrane water recycling device according to claim 1, characterized in that, The bracket is fixed with a docking plate; there are two ultrafiltration membrane tanks, which are located on the same side of the sedimentation tank and the water storage tank; there are two reverse osmosis membrane tanks, which are located on the same side of the sedimentation tank and the water storage tank, and the reverse osmosis membrane tanks are opposite to the ultrafiltration membrane tanks.

4. The dual-membrane water recycling device according to claim 1, characterized in that, The conveying component includes: The main inlet pipe is located above the support; the four-way inlet pipe is fixed above the main inlet pipe and fixed to the connecting pipes above the two ultrafiltration membrane tanks; the first electromagnetic inlet valve is fixed above the main inlet pipe; the three-way inlet pipe has its inlet end fixed below the main inlet pipe and its outlet end fixed to the connecting pipes below the two ultrafiltration membrane tanks respectively; the second electromagnetic inlet valve is fixed below the main inlet pipe; and the first external end cap is threaded onto the main inlet pipe.

5. A dual-membrane water recycling device according to claim 4, characterized in that, The conveying component also includes: A water supply pipe is fixed below the water storage tank; a first booster pump has its base fixed below the water storage tank and its working end fixed to the water supply pipe; a first electromagnetic water supply valve is fixed above the water supply pipe; a first water supply tee has its inlet fixed above the water supply pipe and its outlets fixed to the connecting pipes above the two reverse osmosis membrane tanks; a second electromagnetic water supply valve is fixed below the water supply pipe; a second water supply tee has its inlet fixed below the water supply pipe and its outlets fixed to the connecting pipes below the two reverse osmosis membrane tanks.

6. A dual-membrane water recycling device according to claim 5, characterized in that, The conveying component also includes: The sedimentation return water pipe has one end inserted into the sedimentation tank and the other end fixed to the four-way inlet pipe; the second booster pump has its pump base fixed above the sedimentation tank and its working end fixed to the sedimentation return water pipe; the electromagnetic return water valve is fixed to the sedimentation return water pipe; the sludge discharge pipe is fixed below the sedimentation tank; the electromagnetic sludge valve is fixed to the sludge discharge pipe; the reclaimed water pipe is fixed to the reverse osmosis membrane tank; the second external end cap is threaded onto the reclaimed water pipe; the inlet booster pump has its pump base fixed to the bracket; the flow sensor is fixed to the four-way inlet pipe and the three-way inlet pipe, and fixed to the first supply tee pipe and the second supply tee pipe; the pressure sensor is fixed to the four-way inlet pipe and the three-way inlet pipe, and fixed to the first supply tee pipe and the second supply tee pipe; and the transfer pipe has one end fixed to the middle of the ultrafiltration membrane tank and the other end fixed above the water storage tank.

7. A water reuse method for a dual-membrane water reuse device, applied to the dual-membrane water reuse device according to any one of claims 1-6, characterized in that, The reuse method steps are as follows: Step S1: Start the inlet booster pump, open the first electromagnetic inlet valve, and close the second electromagnetic inlet valve. The purified water enters the tubular ultrafiltration membrane of the ultrafiltration membrane tank through the main inlet pipe and the four-way inlet pipe. Under water pressure, some water permeates through the tubular ultrafiltration membrane to form purified water, which then flows into the storage tank through the transfer pipe. The remaining intercepted water pushes the first cleaning piston of the cleaning float to move down and enters the sedimentation tank through the first unblocking hole, the spiral drainage channel, and the second sedimentation inlet pipe. Step S2: Start the first booster pump and open the first electromagnetic water supply valve. The purified water in the water storage tank enters the tubular reverse osmosis membrane of the reverse osmosis membrane tank through the first water supply tee pipe. Some water permeates through the tubular reverse osmosis membrane to form recycled water, which is discharged from the recycled water pipe. The remaining intercepted water enters the sedimentation tank according to the intercepted water path in step S1. Step S3: Open the electromagnetic sludge valve to discharge the sludge at the bottom of the sedimentation tank; start the second booster pump and open the electromagnetic return water valve. The supernatant in the sedimentation tank returns to the four-way inlet pipe under the action of the second booster pump and the sedimentation return water pipe. After mixing with the new water to be treated, repeat steps S1-S2 until the water level in the sedimentation tank is lower than the set value, then close the second booster pump and the electromagnetic return water valve. Step S4: Under normal operating conditions of the water to be treated, the flow attenuation rate of the four-way inlet pipe, the three-way inlet pipe, the first water supply three-way pipe and the second water supply three-way pipe are collected in real time by the flow sensor. Combined with the instantaneous pressure difference fluctuation value of the pressure sensor, a dynamic fouling coefficient is constructed. Emergency cleaning is triggered when the fouling coefficient is greater than 0.75, and the weight is calculated by increasing the flow rate attenuation rate in real time based on the influent turbidity. When cleaning the ultrafiltration membrane, the first electromagnetic inlet valve is closed and the second electromagnetic inlet valve is opened. The gray wolf algorithm controls the inlet booster pump to generate a stepped pulse water flow, dynamically matching the upward speed of the cleaning float with the adhesion strength of the trapped material. The first and second electromagnetic inlet valves are automatically opened or closed, causing the water flow direction to switch back and forth, removing deep-seated pollutants. When cleaning the reverse osmosis membrane, the first electromagnetic water supply valve is closed and the second electromagnetic water supply valve is opened. The first booster pump is controlled by the Grey Wolf algorithm to generate a stepped pulse water flow, which drives the cleaning float to move upward inside the tubular reverse osmosis membrane. The first electromagnetic water supply valve and the second electromagnetic water supply valve are automatically opened or closed, so that the water flow direction is switched back and forth to remove deep contaminants. Record the flow-pressure correlation curve and the peak value of the float's movement resistance for each cleaning cycle. Dynamically optimize the water pressure increase and cleaning cycle using the Grey Wolf algorithm. When the float's movement resistance changes abruptly, immediately switch to low power mode and trigger an audible and visual alarm. Terminate the cycle when the cleaning efficiency decreases to 35% of the initial value.

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