Seawater desalination treatment system

Abstract

The invention relates to the technical field of seawater desalination, in particular to a seawater desalination treatment system which comprises a pretreatment unit, a clean water tank is arranged on one side of the pretreatment unit, a self-cleaning filter is arranged on one side of the clean water tank, and a self-cleaning mechanism for automatic cleaning is arranged in the self-cleaning filter. A reverse osmosis cleaning mechanism convenient to clean is arranged in the reverse osmosis support, a fresh water tank is arranged at one end of the reverse osmosis support, and auxiliary mechanisms for cleaning and dosing are arranged on one side of the ultrafiltration unit and one side of the reverse osmosis support. The system not only can carry out full-automatic desalination work, but also can improve the cleaning quality of the filter screen and the first discharge pipe, ensures the normal work of the filter screen and the first discharge pipe, prolongs the service life of the system, is convenient for a user to clean, and also can improve the seawater desalination efficiency and quality; meanwhile, the use cost and the maintenance cost of a user should be reduced.

Description

Technical Field

[0001] This invention relates to the field of seawater desalination technology, specifically to a seawater desalination system. Background Technology

[0002] Seawater desalination is the process of producing fresh water by desalinating seawater. It is an incremental technology for realizing the utilization of water resources, which can increase the total amount of fresh water and is not affected by time, space and climate. It can ensure a stable water supply for drinking water for coastal residents and feedwater for industrial boilers. The process of obtaining fresh water from seawater is called seawater desalination. The seawater desalination methods used include seawater freezing, electrodialysis, distillation, reverse osmosis and ammonium carbonate ion exchange. The application of reverse osmosis membrane method and distillation method are the mainstream in the market. Currently, the self-cleaning filters and reverse osmosis membranes in some existing seawater desalination systems are not easy to clean, and the cleaning is not thorough enough, which increases the user's operating costs, shortens the service life of the filters and reverse osmosis membranes, and reduces the filtration effect. Summary of the Invention

[0003] The purpose of this invention is to provide a seawater desalination system to address the problems mentioned in the background section regarding the inconvenience and incomplete cleaning of self-cleaning filters and reverse osmosis membranes in some existing seawater desalination systems. This results in increased user costs, shortened lifespan of the filters and membranes, and reduced filtration efficiency. This system not only enables fully automated desalination but also improves the cleaning quality of the filters and the first discharge pipe, ensuring their normal operation. While extending their lifespan and facilitating user cleaning, it also enhances the efficiency and quality of seawater desalination, while simultaneously reducing user operating and maintenance costs.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a seawater desalination system, comprising a pretreatment unit, a clear water tank on one side of the pretreatment unit, a self-cleaning filter on one side of the clear water tank, an ultrafiltration unit on one side of the self-cleaning filter, an ultrafiltration water tank on one side of the ultrafiltration unit, a reverse osmosis support on one side of the ultrafiltration water tank, a freshwater tank at one end of the reverse osmosis support, a self-cleaning mechanism for automatic cleaning inside the self-cleaning filter, a reverse osmosis cleaning mechanism for easy cleaning inside the reverse osmosis support, a freshwater tank at one end of the reverse osmosis support, and auxiliary mechanisms for cleaning and chemical dosing on one side of both the ultrafiltration unit and the reverse osmosis support.

[0005] Preferably, one end of the pretreatment unit is connected to a first connecting pipe connected to a clear water tank, and a first water pump is installed at one end of the first connecting pipe. One end of the clear water tank is connected to a second connecting pipe connected to a self-cleaning filter, and a second water pump is installed at one end of the second connecting pipe. The bottom of the self-cleaning filter is connected to a third connecting pipe connected to an ultrafiltration unit, and a third water pump is installed at one end of the third connecting pipe. The bottom of the ultrafiltration unit is connected to a sixth connecting pipe connected to an ultrafiltration water tank, and a sixth water pump is installed at one end of the sixth connecting pipe. The bottom of the ultrafiltration water tank is connected to a seventh connecting pipe connected to a first security filter, and a seventh water pump is installed at one end of the seventh connecting pipe. Reverse osmosis tanks are uniformly fixedly connected inside the reverse osmosis support, and one end of each reverse osmosis tank is connected to the first security filter. The system is connected to an eighth connecting pipe, one end of which is equipped with an eighth water pump. One end of each reverse osmosis tank is connected to a connector via a flange. One end of each connector is connected to a movable connecting pipe via a flange. One end of the movable connecting pipe is connected to a ninth connecting pipe, which is connected to a freshwater tank. One end of the ninth connecting pipe is equipped with a ninth water pump. A second three-way solenoid valve is located in the middle of the ninth connecting pipe. The output end of the second three-way solenoid valve is connected to a second discharge pipe. One end of the freshwater tank is connected to a third discharge pipe, one end of which is equipped with a second solenoid valve. The end of the reverse osmosis tank near the connector is connected to a tenth connecting pipe, one end of which is equipped with a tenth water pump. This system facilitates connection of the entire system and enables graded discharge and recycling of wastewater, preventing pollution.

[0006] Preferably, the self-cleaning mechanism includes a partition plate. The partition plate is fixedly connected to the upper middle part of the self-cleaning filter. A filter screen connected to the partition plate via a bearing is connected to the inner wall of the bottom of the self-cleaning filter. A first cleaning brush fixed to the inner wall of the filter screen is provided on the inner wall of the filter screen, and the first cleaning brush is used to clean the inner wall of the filter screen. A second cleaning brush fixedly connected to the self-cleaning filter and the partition plate is provided between the self-cleaning filter and the filter screen, and the second cleaning brush is used to clean the filter material in the pores of the filter screen. One side of the first cleaning brush and the second cleaning brush are respectively attached to the inner wall and surface of the filter screen. A circular toothed plate is fixedly connected to the top of the filter screen. A first motor is provided at the top of the self-cleaning filter, and the output end of the first motor is connected to the partition plate via a bearing. A gear meshing with the circular toothed plate is fixedly connected to the output end of the first motor. The control end of the first motor is electrically connected to an external power source, which enables the self-cleaning filter to perform automatic cleaning, improves the cleaning effect and efficiency, and facilitates user operation.

[0007] Preferably, the auxiliary mechanism includes a cleaning water tank. A cleaning water tank is installed at one end of both the ultrafiltration unit and the reverse osmosis support. A second security filter is installed on one side of the cleaning water tank. An eleventh connecting pipe connected to the second security filter is connected to the bottom of the cleaning water tank. An eleventh water pump is installed at one end of the eleventh connecting pipe. A twelfth connecting pipe is connected to the bottom of each of the second security filters. A twelfth water pump is installed at one end of each of the twelfth connecting pipes. One end of one set of the twelfth connecting pipes is connected to an eighth connecting pipe, and one end of another set of the twelfth connecting pipes is connected to the ultrafiltration unit. A first dosing tank is installed at one end of the reverse osmosis support. A third three-way solenoid valve is installed at one end of one set of the twelfth connecting pipes. A thirteenth connecting rod connected to the third three-way solenoid valve is connected to one end of the first dosing tank. A second dosing tank is installed at the top of the ultrafiltration unit. The control terminals of the eleventh water pump, the twelfth water pump, and the third three-way solenoid valve are all electrically connected to an external power source, facilitating user dosing and cleaning operations and ensuring the normal operation of the system.

[0008] Preferably, the bottom end of the ultrafiltration unit is connected to a fourth connecting pipe that is connected to the pretreatment unit. A fourth water pump is installed at one end of the fourth connecting pipe. The bottom end of the self-cleaning filter is connected to a fifth connecting pipe that is connected to the middle of the fourth connecting pipe. A fifth water pump is installed at one end of the fifth connecting pipe, and a first solenoid valve is installed at the other end of the fifth connecting pipe. A first three-way solenoid valve is installed at one end of the fourth connecting pipe. The output end of the first three-way solenoid valve is connected to a first discharge pipe. The first three-way solenoid valve is located between the fourth water pump and the connection point between the fifth and fourth connecting pipes. The control terminals of the fourth water pump, the fifth water pump, the first solenoid valve, and the first three-way solenoid valve are all electrically connected to an external power source, enabling the wastewater to be discharged in stages and recycled, thus avoiding pollution.

[0009] Preferably, the reverse osmosis cleaning mechanism includes a connecting sleeve. A connecting sleeve is provided inside one end of each reverse osmosis tank. A second motor is provided at one end of each reverse osmosis tank. A reverse osmosis assembly is provided inside the reverse osmosis tank. Support plates are uniformly fixedly connected to the inner wall of the bottom end of the reverse osmosis tank. A plug located inside the connecting sleeve is fixedly connected to one end of the reverse osmosis assembly. Slots are uniformly formed on the surface of the plug. Insert plates, which are fixedly connected to the inner wall of the connecting sleeve, are slidably connected inside each slot. A rotating head is connected inside the connector via a bearing. Limiting holes are uniformly formed at the inner diameter separation points of both ends of the rotating head. A stop plate is slidably connected to the middle of the rotating head, and one end of the stop plate is in contact with one end of the reverse osmosis assembly. Springs, which are fixedly fixed to the inner wall of the limiting holes, are uniformly fixed to one end of the stop plate. This facilitates subsequent cleaning and maintenance by the user, while also increasing the service life of the reverse osmosis assembly and reducing user operating costs.

[0010] Preferably, the plug is frustum-shaped, and the inner wall of the connecting sleeve is shaped to fit the plug, facilitating the user's subsequent installation of the reverse osmosis assembly. The length of the insert plate is less than the length of the slot, and the inner diameters of the two ends of the rotor are different. One end of the reverse osmosis assembly is slidably connected to one end of the rotor. The inner diameter of one end of the rotor is adapted to the outer diameter of the reverse osmosis assembly. The inner diameter of the end of the rotor that is slidably connected to the reverse osmosis assembly is larger than that of the other end, which facilitates the user's installation and fixation of the reverse osmosis assembly, and also ensures that one end of the reverse osmosis assembly is always in contact with the connecting sleeve, facilitating subsequent maintenance.

[0011] Preferably, the output ends of the second motor are all connected to the reverse osmosis tank through a rotary seal, the output end of the second motor is fixedly connected to one end of the connecting sleeve, and the control end of the second motor is electrically connected to an external power source to facilitate the operation of the system.

[0012] Preferably, the inner wall of the bottom end of the self-cleaning filter is concave in an arc shape, which facilitates the centralized collection and discharge of the filtered material.

[0013] Preferably, the control terminals of the first, second, third, sixth, seventh, eighth, ninth, second three-way solenoid valve, and tenth water pump are all electrically connected to an external power source to facilitate the operation of this device.

[0014] Compared with the prior art, the beneficial effects of the present invention are: In operation, this system pre-treats seawater through a pretreatment unit. The pre-treated seawater is then transported to a clear water tank via a first connecting pipe and a first water pump. The seawater in the clear water tank is then transported to a self-cleaning filter via a second connecting pipe and a second water pump for filtration. The filter screen inside the self-cleaning filter filters the seawater. Users can manually or periodically clean the filter screen, choosing the appropriate method. During cleaning, the output of the first motor rotates the filter screen via a circular toothed plate and gears. The first and second cleaning brushes remove filter debris from the surface and pores of the filter screen, placing the debris in the center of the screen. At this point, the user activates the first solenoid valve, the fifth connecting pipe, and the fifth water pump. The seawater is transported to the pretreatment unit via the fourth connecting pipe, where it undergoes further pretreatment, thus avoiding the need for additional equipment and reducing user costs. Seawater filtered by the self-cleaning filter is then transported to the ultrafiltration unit via the third connecting pipe and the third pump. Ultrafiltration is performed in the ultrafiltration unit, and medication is administered via the second dosing tank. During ultrafiltration, medications, primarily sodium hypochlorite, ultrafiltration CEB with acid, ultrafiltration CEB with alkali, and ultrafiltration CEB with sodium hypochlorite, are administered via the second dosing tank. The ultrafiltered seawater is then transported to the ultrafiltration tank via the sixth connecting pipe and the sixth pump. Seawater from the ultrafiltration tank is then transported to the first security filter via the seventh connecting pipe and the seventh pump. Seawater passing through the first security filter is transported to the reverse osmosis tank via the eighth connecting pipe and the eighth water pump. Reverse osmosis filtration is performed in the tank, followed by reverse osmosis through the internal reverse osmosis assembly. During reverse osmosis, the output of the second motor drives the reverse osmosis assembly and rotor to rotate via a connecting sleeve, slot, and plug. This ensures that seawater passes evenly across the surface of the reverse osmosis assembly, guaranteeing uniformity and preventing concentrated reverse osmosis at the ends and surface of the assembly. Simultaneously, chemical dosing is administered through the first dosing tank, the thirteenth connecting rod, the third three-way solenoid valve, the twelfth water pump, and the twelfth connecting pipe. The dosing primarily consists of reducing agents, scale inhibitors, and non-oxygen bactericides. The concentrated solution after reverse osmosis is then... The water is discharged through the tenth connecting pipe and the tenth water pump, and finally undergoes grading and classification treatment. After reverse osmosis through the reverse osmosis assembly, the seawater enters the interior of the connector through the rotor, and is finally transported to the freshwater tank through the movable connecting pipe, the second three-way solenoid valve, the ninth connecting pipe, and the ninth water pump. The freshwater in the freshwater tank is transported to the next process for demineralization through the third discharge pipe and the second solenoid valve. The cleaning water tank, the second security filter, the eleventh connecting pipe, the eleventh water pump, and the twelfth connecting pipe in the auxiliary mechanism can chemically clean the interior of the ultrafiltration unit and the reverse osmosis tank, thereby ensuring the filtration quality and removing residual chemicals. The chemical cleaning solution inside the reverse osmosis tank is discharged through the movable connecting pipe, the second three-way solenoid valve, and the second discharge pipe.The chemical cleaning solution inside the ultrafiltration unit is discharged through the fourth water pump, the first discharge pipe, and the first discharge pipe, thus preventing the liquid after chemical cleaning from contaminating the system and ensuring the safety of the system's operation. When cleaning the reverse osmosis assembly is required, the ninth connecting pipe and the ninth water pump reverse-flow the freshwater from the freshwater tank to the inside of the connector, and discharge the cleaning solution through the tenth connecting pipe and the tenth water pump, thereby creating a negative pressure between the reverse osmosis tank and the reverse osmosis assembly. This allows the freshwater to pass through the reverse osmosis assembly, flushing away the filter material on its surface. At the same time, the second motor drives the reverse osmosis assembly to rotate through the connecting sleeve and plug. Under the action of centrifugal force, the filter material on the surface of the reverse osmosis assembly is also thrown off. The negative pressure backwashing combined with the action of centrifugal force improves the cleaning effect of the reverse osmosis assembly, ensuring the reliability of the reverse osmosis assembly and the quality of reverse osmosis. When the user needs to replace the reverse osmosis assembly, first separate the connector and the movable connecting pipe, and then separate the connector from the reverse osmosis tank. At this time, the user can replace the reverse osmosis assembly inside the reverse osmosis tank. The support plate installed on the inner wall of the bottom of the reverse osmosis tank supports the reverse osmosis assembly. The frustoconical plug facilitates insertion into the connecting sleeve. The user rotates the reverse osmosis assembly to insert the slot into the plug, thus achieving positioning and limiting. Then, the user places the rotating head at one end of the connector onto the other end of the reverse osmosis assembly. When connecting the reverse osmosis tank and connector using the flange, the abutment plate and spring limit and push the reverse osmosis assembly, ensuring that the plug at one end of the assembly disengages from the connecting sleeve. This not only ensures accurate positioning of the reverse osmosis assembly but also guarantees its safety during use inside the reverse osmosis tank. Finally, the connector and movable connecting pipe are connected using the flange. The system is now complete. This system not only performs fully automatic desalination but also improves the cleaning quality of the filter screen and the first discharge pipe, ensuring their normal operation. While extending their service life and facilitating user cleaning, it also improves the efficiency and quality of seawater desalination, and simultaneously reduces user operating and maintenance costs. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of the present invention; Figure 2 This is a three-dimensional schematic diagram of the first and second water pumps in this invention; Figure 3 This is a three-dimensional cross-sectional view of the self-cleaning filter and filter screen in this invention; Figure 4 This is a three-dimensional schematic diagram of the first three-way solenoid valve and the twelfth connecting pipe in this invention; Figure 5 This is a three-dimensional schematic diagram of the seventh water pump and the connector in this invention; Figure 6This is a three-dimensional schematic diagram of the first dosing tank and the tenth connecting pipe in this invention; Figure 7 This is a three-dimensional cross-sectional view of the reverse osmosis tank and connecting sleeve in this invention; Figure 8 This is a three-dimensional cross-sectional view of the connector and the rotating head in this invention; Figure 9 This is a three-dimensional cross-sectional view of the reverse osmosis tank and rotor in this invention.

[0016] In the diagram: 1. Pretreatment unit; 2. Clear water tank; 3. Self-cleaning filter; 4. Ultrafiltration unit; 5. Ultrafiltration water tank; 6. First security filter; 7. Reverse osmosis support; 8. Fresh water tank; 9. First connecting pipe; 10. First water pump; 11. Second connecting pipe; 12. Second water pump; 13. Partition plate; 14. Filter screen; 15. First cleaning brush; 16. Second cleaning brush; 17. Circular toothed plate; 18. First motor; 19. Gear; 20. Third connecting pipe; 21. Third water pump; 22. Fourth connecting pipe; 23. Fourth water pump; 24. Fifth connecting pipe; 25. Fifth water pump; 26. First solenoid valve; 27. First three-way solenoid valve; 28. First discharge pipe; 29. ​​Sixth connecting pipe; 30. Sixth water pump; 31. Seventh connecting pipe; 32. Seventh water pump; 33. Reverse osmosis tank; 34. Eighth connecting pipe; 35. Eighth water pump; 36. Connector; 37. Movable connecting pipe; 38. Ninth connecting pipe; 39. Ninth water pump; 40. Second three-way solenoid valve; 41. Second discharge pipe; 42. Third discharge pipe; 43. Second solenoid valve; 44. Tenth connecting pipe; 45. Tenth water pump; 46. Connecting sleeve; 47. Second motor; 48. Reverse osmosis assembly; 49. Support plate; 50. Plug; 51. Slot; 52. Insert plate; 53. Rotary head; 54. Limiting hole; 55. Support plate; 56. Spring; 57. Cleaning water tank; 58. Second security filter; 59. Eleventh connecting pipe; 60. Eleventh water pump; 61. Twelfth connecting pipe; 62. Twelfth water pump; 63. First dosing tank; 64. Third three-way solenoid valve; 65. Thirteenth connecting rod; 66. Second dosing tank. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figures 1-9 One embodiment provided by the present invention: A seawater desalination system includes a pretreatment unit 1, a clear water tank 2 on one side of the pretreatment unit 1, a self-cleaning filter 3 on one side of the clear water tank 2, an ultrafiltration unit 4 on one side of the self-cleaning filter 3, an ultrafiltration water tank 5 on one side of the ultrafiltration unit 4, a reverse osmosis support 7 on one side of the ultrafiltration water tank 5, a freshwater tank 8 at one end of the reverse osmosis support 7, a self-cleaning mechanism for automatic cleaning inside the self-cleaning filter 3, a reverse osmosis cleaning mechanism for easy cleaning inside the reverse osmosis support 7, a freshwater tank 8 at one end of the reverse osmosis support 7, and auxiliary mechanisms for cleaning and chemical dosing on one side of both the ultrafiltration unit 4 and the reverse osmosis support 7. Please see Figures 1-9 In this embodiment, one end of the pretreatment unit 1 is connected to a first connecting pipe 9 connected to the clear water tank 2, and a first water pump 10 is installed at one end of the first connecting pipe 9. One end of the clear water tank 2 is connected to a second connecting pipe 11 connected to the self-cleaning filter 3, and a second water pump 12 is installed at one end of the second connecting pipe 11. The bottom of the self-cleaning filter 3 is connected to a third connecting pipe 20 connected to the ultrafiltration unit 4, and a third water pump 21 is installed at one end of the third connecting pipe 20. The bottom of the ultrafiltration unit 4 is connected to a sixth connecting pipe 29 connected to the ultrafiltration water tank 5, and a sixth water pump 30 is installed at one end of the sixth connecting pipe 29. The bottom of the ultrafiltration water tank 5 is connected to a seventh connecting pipe 31 connected to the first security filter 6, and a seventh water pump 32 is installed at one end of the seventh connecting pipe 31. Reverse osmosis tanks 33 are uniformly fixedly connected inside the reverse osmosis support 7, and one end of the reverse osmosis tank 33 is connected to the first security filter 6. The eighth connecting pipe 34 is connected to the reverse osmosis tank 33. One end of the eighth connecting pipe 34 is equipped with an eighth water pump 35. One end of the reverse osmosis tank 33 is connected to a connector 36 via a flange. One end of the connector 36 is connected to a movable connecting pipe 37 via a flange. One end of the movable connecting pipe 37 is connected to a ninth connecting pipe 38 connected to the freshwater tank 8. One end of the ninth connecting pipe 38 is equipped with a ninth water pump 39. A second three-way solenoid valve 40 is installed in the middle of the ninth connecting pipe 38. The output end of the second three-way solenoid valve 40 is connected to a second discharge pipe 41. One end of the freshwater tank 8 is connected to a third discharge pipe 42. One end of the third discharge pipe 42 is equipped with a second solenoid valve 43. The end of the reverse osmosis tank 33 near the connector 36 is connected to a tenth connecting pipe 44. One end of the tenth connecting pipe 44 is equipped with a tenth water pump 45. This facilitates the connection of the entire system and enables the wastewater to be discharged in stages and recycled, thus avoiding pollution. Please see Figure 3 and Figure 4In this embodiment, the self-cleaning mechanism includes a partition plate 13. The partition plate 13 is fixedly connected to the upper middle part of the self-cleaning filter 3. A filter screen 14, which is connected to the partition plate 13 via a bearing, is connected to the inner wall of the bottom end of the self-cleaning filter 3. A first cleaning brush 15, which is fixed to the inner wall of the self-cleaning filter 3, is provided on the inner wall of the filter screen 14. The first cleaning brush 15 is used to clean the inner wall of the filter screen 14. A second cleaning brush 16, which is fixedly connected to the self-cleaning filter 3 and the partition plate 13, is provided between the self-cleaning filter 3 and the filter screen 14. The second cleaning brush 16 is used to clean the filtered material in the pores of the filter screen 14. One side of the first cleaning brush 15 and the second cleaning brush 16 are respectively attached to the inner wall and surface of the filter screen 14. A circular toothed plate 17 is fixedly connected to the top of the filter screen 14. A first motor 18 is provided at the top of the self-cleaning filter 3, and the output end of the first motor 18 is connected to the partition plate 13 through a bearing. A gear 19 that meshes with the circular toothed plate 17 is fixedly connected to the output end of the first motor 18. The control end of the first motor 18 is electrically connected to an external power source. Seawater inside the clear water tank 2 is transported to the self-cleaning filter 3 through the second connecting pipe 11 and the second water pump 12 for filtration. The seawater is filtered through the filter screen 14 inside the self-cleaning filter 3. Users can perform manual cleaning or timed cleaning according to their own choices. During cleaning, the output end of the first motor 18 drives the circular toothed plate 17 to rotate. The rotating circular toothed plate 17 drives the gear 19 and the filter screen 14 to rotate slowly. At this time, the fixed first cleaning brush 15 and the second cleaning brush 16 can clean the filter material on the surface and in the pores of the filter screen 14, so that the filter material is in the middle of the filter screen 14. At this time, the user controls the first solenoid valve 26 and the fifth water pump 25 to open. The filtered mixture inside the self-cleaning filter 3 is transported to the pretreatment unit 1 through the fourth connecting pipe 22. The pretreatment unit 1 performs pretreatment again, thereby avoiding the need to add new equipment for treatment and discharge, thus reducing the user's treatment costs. It enables the self-cleaning filter 3 to clean automatically, and also improves the cleaning effect and efficiency, making it convenient for users to use. Please see Figures 4-6In this embodiment, the auxiliary mechanism includes a cleaning water tank 57. A cleaning water tank 57 is installed at one end of both the ultrafiltration unit 4 and the reverse osmosis support 7. A second security filter 58 is installed on one side of the cleaning water tank 57. An eleventh connecting pipe 59, connected to the second security filter 58, is connected to the bottom of the cleaning water tank 57. An eleventh water pump 60 is installed at one end of the eleventh connecting pipe 59. A twelfth connecting pipe 61 is connected to the bottom of each of the second security filters 58. A twelfth water pump 62 is installed at one end of each of the twelfth connecting pipes 61. One end of one set of twelfth connecting pipes 61 is connected to an eighth connecting pipe 34, and one end of another set of twelfth connecting pipes 61 is connected to the ultrafiltration unit 4. The reverse osmosis support 7 is connected to the first dosing tank 63 at one end, and a third three-way solenoid valve 64 is installed at one end of a set of twelfth connecting pipes 61. A thirteenth connecting rod 65, which is connected to the third three-way solenoid valve 64, is connected to one end of the first dosing tank 63. A second dosing tank 66 is installed at the top of the ultrafiltration unit 4. The control terminals of the eleventh water pump 60, the twelfth water pump 62, and the third three-way solenoid valve 64 are all electrically connected to an external power source. When the ultrafiltration unit 4 performs ultrafiltration, the drugs are administered through the second dosing tank 66, mainly sodium hypochlorite, ultrafiltration CEB with acid, ultrafiltration CEB with alkali, and ultrafiltration CEB with sodium hypochlorite. The drugs are administered through the third three-way solenoid valve. The solenoid valve 64 connects the thirteenth connecting rod 65 and the twelfth connecting pipe 61. The twelfth water pump 62 then allows the chemical solution inside the first chemical tank 63 to enter the reverse osmosis tank 33 through the thirteenth connecting rod 65, the twelfth connecting pipe 61, and the eighth connecting pipe 34, thus administering the chemical. The chemical solution mainly consists of reducing agents, scale inhibitors, and non-oxygen bactericides. The thirteenth connecting rod 65 is closed by the third three-way solenoid valve 64. Then, the cleaning solution inside the cleaning tank 57 enters the second security filter 58 through the eleventh water pump 60 and the eleventh connecting pipe 59 in the auxiliary mechanism. After filtration by the second security filter 58, the solution flows through the twelfth connecting pipe 61 and the thirteenth connecting pipe 62. The second water pump 62 delivers water to the interior of the ultrafiltration unit 4 and the reverse osmosis tank 33, thereby chemically cleaning the interior of the ultrafiltration unit 4 and the reverse osmosis tank 33, ensuring the filtration quality and removing residual chemicals. The chemical cleaning solution inside the reverse osmosis tank 33 is discharged through the movable connecting pipe 37, the second three-way solenoid valve 40 and the second discharge pipe 41, and the chemical cleaning solution inside the ultrafiltration unit 4 is discharged through the fourth water pump 23, the first discharge pipe 28 and the first discharge pipe 28, thereby avoiding the liquid after chemical cleaning from contaminating the system, ensuring the safety of the system, facilitating the user's chemical dosing and cleaning work, and ensuring the normal use of the system. Please see Figures 5-9In this embodiment, the reverse osmosis cleaning mechanism includes a connecting sleeve 46. A connecting sleeve 46 is provided inside one end of the reverse osmosis tank 33. A second motor 47 is provided at one end of each reverse osmosis tank 33. A reverse osmosis assembly 48 is provided inside the reverse osmosis tank 33. Support plates 49 are uniformly fixedly connected to the inner wall at the bottom of the reverse osmosis tank 33. A plug 50 located inside the connecting sleeve 46 is fixedly connected to one end of the reverse osmosis assembly 48. Slots 51 are uniformly formed on the surface of the plug 50. Insert plates 52, which are fixedly connected to the inner wall of the connecting sleeve 46, are slidably connected inside the slots 51. A rotating head 53 is connected inside the connector 36 via a bearing. Limiting holes 54 are uniformly formed at the separation points of the inner diameters at both ends of the rotating head 53. A stop plate 55 is slidably connected to the middle of the rotating head 53. One end of plate 5 is attached to one end of reverse osmosis assembly 48. One end of plate 55 is uniformly fixed with springs 56 that are fixed to the inner wall of limiting hole 54. Seawater inside ultrafiltration tank 5 is transported to first security filter 6 via seventh connecting pipe 31 and seventh water pump 32. Seawater passing through first security filter 6 is transported to the interior of reverse osmosis tank 33 via eighth connecting pipe 34 and eighth water pump 35. Reverse osmosis filtration is performed in reverse osmosis tank 33, and reverse osmosis is performed through reverse osmosis assembly 48 inside reverse osmosis tank 33. During reverse osmosis, the output end of second motor 47 drives reverse osmosis assembly 48 and rotor 53 to rotate slowly via connecting sleeve 46, slot 51, and plug 50, thereby allowing seawater to pass evenly through the surface of reverse osmosis assembly 48, ensuring the reverse osmosis process is complete. To ensure uniformity during seawater reverse osmosis in the reverse osmosis assembly 48, and to prevent reverse osmosis concentration at both ends and on the surface of the assembly, the concentrated solution after reverse osmosis is discharged through the tenth connecting pipe 44 and the tenth water pump 45. Finally, it undergoes grading and classification treatment. Seawater after reverse osmosis through the assembly 48 enters the interior of the connector 36 through the rotor 53, and is then transported to the freshwater tank 8 through the movable connecting pipe 37, the second three-way solenoid valve 40, the ninth connecting pipe 38, and the ninth water pump 39. The freshwater inside the tank 8 is transported to the next process through the third discharge pipe 42 and the second solenoid valve 43. When cleaning of the reverse osmosis assembly 48 is required, the ninth connecting pipe 38 and the ninth water pump 39 reverse the flow of freshwater from the tank 8 back to the connector 36. Internally, cleaning fluid is discharged through the tenth connecting pipe 44 and the tenth water pump 45, creating a negative pressure between the reverse osmosis tank 33 and the reverse osmosis assembly 48. This causes fresh water to pass through the reverse osmosis assembly 48, flushing away the filter material on its surface. Simultaneously, the second motor 47 drives the reverse osmosis assembly 48 to rotate through the connecting sleeve 46 and the plug 50. Under the action of centrifugal force, the filter material on the surface of the reverse osmosis assembly 48 is also thrown off. The combination of negative pressure backwashing and centrifugal force improves the cleaning effect of the reverse osmosis assembly 48, ensuring the reliability of the reverse osmosis assembly 48 and the quality of reverse osmosis. When the user needs to replace the reverse osmosis assembly 48, first, the connector 36 and the movable connecting pipe 37 are separated, and then the connector 36 is separated from the reverse osmosis tank 33.At this point, the user can replace the reverse osmosis assembly 48 inside the reverse osmosis tank 33. The support plate 49 on the inner wall of the bottom of the reverse osmosis tank 33 supports the reverse osmosis assembly 48. The frustoconical plug 50 facilitates insertion into the connecting sleeve 46. By rotating the reverse osmosis assembly 48, the user can insert the slot 51 into the plug 50, thus achieving positioning and limiting. Then, the user places the rotating head 53 at one end of the connector 36 onto one end of the reverse osmosis assembly 48. When connecting the reverse osmosis tank 33 and the connector 36 using the flange... At this point, the stop plate 55 and spring 56 can limit and push the reverse osmosis assembly 48, thereby ensuring that the plug 50 at one end of the reverse osmosis assembly 48 is disengaged from the connecting sleeve 46. This not only ensures the accurate positioning of the reverse osmosis assembly 48 but also guarantees its safety when used inside the reverse osmosis tank 33. Finally, the connector 36 and the movable connecting pipe 37 are connected by the flange. The replacement is now complete, facilitating subsequent cleaning and maintenance by the user, while also extending the service life of the reverse osmosis assembly 48 and reducing user operating costs. It should be noted that the bottom end of the ultrafiltration unit 4 is connected to a fourth connecting pipe 22, which is connected to the pretreatment unit 1. A fourth water pump 23 is installed at one end of the fourth connecting pipe 22. The bottom end of the self-cleaning filter 3 is connected to a fifth connecting pipe 24, which is connected to the middle of the fourth connecting pipe 22. A fifth water pump 25 is installed at one end of the fifth connecting pipe 24, and a first solenoid valve 26 is installed at the other end of the fifth connecting pipe 24. A first three-way solenoid valve 27 is installed at one end of the fourth connecting pipe 22, and the output end of the first three-way solenoid valve 27 is connected to a first discharge valve. Pipe 28, the first three-way solenoid valve 27 is located between the fourth water pump 23 and the connection point of the fifth connecting pipe 24 and the fourth connecting pipe 22. The control terminals of the fourth water pump 23, the fifth water pump 25, the first solenoid valve 26 and the first three-way solenoid valve 27 are all electrically connected to an external power source, enabling the wastewater to be discharged in stages and recycled to avoid pollution. The plug 50 is frustum-shaped, and the inner wall of the connecting sleeve 46 is shaped to fit the plug 50, facilitating the user's subsequent installation of the reverse osmosis assembly 48. The length of the insert plate 52 is less than that of the slot 5. The length of the rotor 53 is such that the inner diameters at both ends of the rotor 53 are different. One end of the reverse osmosis assembly 48 is slidably connected to one end of the rotor 53. The inner diameter of one end of the rotor 53 is adapted to the outer diameter of the reverse osmosis assembly 48. The inner diameter of the end of the rotor 53 that is slidably connected to the reverse osmosis assembly 48 is larger than that of the other end, which facilitates the user's installation and fixation of the reverse osmosis assembly 48. At the same time, it can also ensure that one end of the reverse osmosis assembly 48 is always in contact with the connecting sleeve 46, which facilitates subsequent maintenance. The output end of the second motor 47 is connected to the reverse osmosis tank 33 through a rotary seal. The output end of the second motor 47 is fixedly connected to one end of the connecting sleeve 46. The control end of the second motor 47 is electrically connected to an external power supply to facilitate the operation of the system. The inner wall of the bottom of the self-cleaning filter 3 is concave and rounded to facilitate the centralized collection and discharge of the filtered material. The control ends of the first water pump 10, the second water pump 12, the third water pump 21, the sixth water pump 30, the seventh water pump 32, the eighth water pump 35, the ninth water pump 39, the second three-way solenoid valve 40, and the tenth water pump 45 are all electrically connected to an external power supply to facilitate the operation of the device.

[0019] In operation, the system pre-treats seawater through pretreatment unit 1. The pre-treated seawater is then transported to the clear water tank 2 via first connecting pipe 9 and first water pump 10. The seawater in clear water tank 2 is then transported to the self-cleaning filter 3 via second connecting pipe 11 and second water pump 12 for filtration. The filter screen 14 inside the self-cleaning filter 3 filters the seawater. Users can perform manual or timed cleaning, choosing the appropriate method. During cleaning, the output of the first motor 18 drives the circular toothed plate 17 to rotate. The rotating circular toothed plate 17 drives the gear 19 and filter screen 14 to rotate slowly. At this time, the fixed first cleaning brush 15 and second cleaning brush 16 clean the surface of the filter screen 14 and... After the filter material in the pores is cleared, leaving it in the center of the filter screen 14, the user controls the first solenoid valve 26 and the fifth water pump 25 to open. The filtered mixture inside the self-cleaning filter 3 is then transported to the pretreatment unit 1 through the fourth connecting pipe 22 for further pretreatment. This avoids the need for additional equipment for treatment and discharge, thus reducing the user's treatment costs. The seawater filtered by the self-cleaning filter 3 is then transported to the ultrafiltration unit 4 through the third connecting pipe 20 and the third water pump 21 for ultrafiltration. Simultaneously, medication is administered through the second dosing tank 66. During ultrafiltration in the ultrafiltration unit 4, medication is administered through the second dosing tank 66, primarily sodium hypochlorite, ultrafiltration CEB, and acid. The ultrafiltration CEB is supplemented with alkali and sodium hypochlorite. The ultrafiltered seawater is then transported to the ultrafiltration tank 5 via the sixth connecting pipe 29 and the sixth water pump 30. The seawater inside the ultrafiltration tank 5 is then transported to the first security filter 6 via the seventh connecting pipe 31 and the seventh water pump 32. The seawater passing through the first security filter 6 is then transported to the reverse osmosis tank 33 via the eighth connecting pipe 34 and the eighth water pump 35. Reverse osmosis filtration is then performed in the reverse osmosis tank 33, and reverse osmosis is carried out through the reverse osmosis assembly 48 inside the reverse osmosis tank 33. During reverse osmosis, the output end of the second motor 47 drives the reverse osmosis assembly 48 and the rotor 53 to rotate slowly through the connecting sleeve 46, slot 51, and plug 50, thereby allowing the seawater to pass evenly through the reverse osmosis assembly 48. The surface is designed to ensure uniformity of seawater reverse osmosis by the reverse osmosis assembly 48, preventing concentrated reverse osmosis at both ends and on the surface of the assembly. Simultaneously, the third three-way solenoid valve 64 connects the thirteenth connecting rod 65 and the twelfth connecting pipe 61. The twelfth water pump 62 then allows the chemical solution inside the first chemical tank 63 to enter the reverse osmosis tank 33 through the thirteenth connecting rod 65, the twelfth connecting pipe 61, and the eighth connecting pipe 34, thus administering the chemical solution, which mainly consists of reducing agents, scale inhibitors, and non-oxidative bactericides. The concentrated solution after reverse osmosis is discharged through the tenth connecting pipe 44 and the tenth water pump 45, and finally undergoes grading and classification treatment. Seawater after reverse osmosis by the reverse osmosis assembly 48 enters the connector 36 through the rotor 53.Finally, the water is transported to the freshwater tank 8 via the active connecting pipe 37, the second three-way solenoid valve 40, the ninth connecting pipe 38, and the ninth water pump 39. The freshwater inside the freshwater tank 8 is then transported to the next process for demineralization via the third discharge pipe 42 and the second solenoid valve 43. The thirteenth connecting rod 65 is closed via the third three-way solenoid valve 64, and the cleaning solution inside the cleaning tank 57 enters the second security filter 58 via the eleventh water pump 60 and the eleventh connecting pipe 59 in the auxiliary mechanism. After filtration by the second security filter 58, the solution is transported to the interior of the ultrafiltration unit 4 and the reverse osmosis tank 33 via the twelfth connecting pipe 61 and the twelfth water pump 62, thereby enabling chemical cleaning of the interior of the ultrafiltration unit 4 and the reverse osmosis tank 33 and ensuring the quality of filtration. In addition to cleaning residual chemicals, the chemical cleaning solution inside the reverse osmosis tank 33 is discharged through the movable connecting pipe 37, the second three-way solenoid valve 40, and the second discharge pipe 41. The chemical cleaning solution inside the ultrafiltration unit 4 is discharged through the fourth water pump 23, the first discharge pipe 28, and the first discharge pipe 28, thereby avoiding contamination of the system by the liquid after chemical cleaning and ensuring the safety of the system. When it is necessary to clean the reverse osmosis assembly 48, the ninth connecting pipe 38 and the ninth water pump 39 reverse the flow of fresh water from the fresh water tank 8 to the inside of the connector 36, and discharge the cleaning solution through the tenth connecting pipe 44 and the tenth water pump 45, thereby creating a negative pressure between the reverse osmosis tank 33 and the reverse osmosis assembly 48, so that when the fresh water passes through the reverse osmosis assembly 48, it will be decontaminated. The surface filter material is flushed away, and at the same time, the second motor 47 drives the reverse osmosis assembly 48 to rotate through the connecting sleeve 46 and the plug 50. Under the action of centrifugal force, the filter material on the surface of the reverse osmosis assembly 48 can also be thrown off. Through negative pressure reverse flushing combined with the action of centrifugal force, the cleaning effect of the reverse osmosis assembly 48 is improved, ensuring the reliability of the reverse osmosis assembly 48 and the quality of reverse osmosis. When the user needs to replace the reverse osmosis assembly 48, first separate the connector 36 from the movable connecting pipe 37, and then separate the connector 36 from the reverse osmosis tank 33. At this time, the user can replace the reverse osmosis assembly 48 inside the reverse osmosis tank 33. The support plate 49 set on the inner wall of the bottom of the reverse osmosis tank 33 can support the reverse osmosis assembly 48. The plug 50 is designed for easy insertion into the connecting sleeve 46. The user rotates the reverse osmosis assembly 48 to allow the slot 51 to insert into the plug 50, thus achieving positioning and limiting. Then, the user places the rotating head 53 at one end of the connector 36 onto one end of the reverse osmosis assembly 48. When connecting the reverse osmosis tank 33 and the connector 36 via the flange, the abutment plate 55 and spring 56 limit and push the reverse osmosis assembly 48, ensuring that the plug 50 at one end of the reverse osmosis assembly 48 disengages from the connecting sleeve 46. This not only ensures the accurate positioning of the reverse osmosis assembly 48 but also guarantees its safety when used inside the reverse osmosis tank 33. Finally, the connector 36 and the movable connecting pipe 37 are connected via the flange.At this point, the replacement is complete. This system not only performs desalination automatically, but also improves the cleaning quality of filter screen 14 and the first discharge pipe 28, ensuring their normal operation. While extending their service life and facilitating user cleaning, it also improves the efficiency and quality of seawater desalination, and simultaneously reduces user operating and maintenance costs.

[0020] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A seawater desalination system, characterized in that, The system includes a pretreatment unit (1), a clear water tank (2) on one side of the pretreatment unit (1), a self-cleaning filter (3) on one side of the clear water tank (2), an ultrafiltration unit (4) on one side of the self-cleaning filter (3), an ultrafiltration water tank (5) on one side of the ultrafiltration unit (4), a reverse osmosis support (7) on one side of the ultrafiltration water tank (5), a fresh water tank (8) at one end of the reverse osmosis support (7), a self-cleaning mechanism for automatic cleaning inside the self-cleaning filter (3), a reverse osmosis cleaning mechanism for easy cleaning inside the reverse osmosis support (7), a fresh water tank (8) at one end of the reverse osmosis support (7), and auxiliary mechanisms for cleaning and chemical dosing on one side of both the ultrafiltration unit (4) and the reverse osmosis support (7).

2. The seawater desalination system according to claim 1, characterized in that: One end of the pretreatment unit (1) is connected to a first connecting pipe (9) connected to a clear water tank (2), and a first water pump (10) is installed at one end of the first connecting pipe (9). One end of the clear water tank (2) is connected to a second connecting pipe (11) connected to a self-cleaning filter (3), and a second water pump (12) is installed at one end of the second connecting pipe (11). The bottom of the self-cleaning filter (3) is connected to a third connecting pipe (20) connected to an ultrafiltration unit (4). One end of the third connecting pipe (20) is connected to a... A third water pump (21) is provided at the end of the ultrafiltration unit (4). A sixth connecting pipe (29) connected to the ultrafiltration water tank (5) is connected to the bottom of the ultrafiltration unit (4). A sixth water pump (30) is provided at one end of the sixth connecting pipe (29). A seventh connecting pipe (31) connected to the first security filter (6) is connected to the bottom of the ultrafiltration water tank (5). A seventh water pump (32) is connected at one end of the seventh connecting pipe (31). A reverse osmosis tank (33) is uniformly fixedly connected inside the reverse osmosis support (7). The reverse osmosis tank (33) One end of the reverse osmosis tank (33) is connected to an eighth connecting pipe (34) that is connected to the first security filter (6). An eighth water pump (35) is installed at one end of the eighth connecting pipe (34). One end of the reverse osmosis tank (33) is connected to a connector (36) via a flange. One end of the connector (36) is connected to a movable connecting pipe (37) via a flange. One end of the movable connecting pipe (37) is connected to a ninth connecting pipe (38) that is connected to the freshwater tank (8). One end of the ninth connecting pipe (38) is equipped with a ninth... The water pump (39) is provided with a second three-way solenoid valve (40) in the middle of the ninth connecting pipe (38). The output end of the second three-way solenoid valve (40) is connected to a second discharge pipe (41). One end of the fresh water tank (8) is connected to a third discharge pipe (42). One end of the third discharge pipe (42) is provided with a second solenoid valve (43). The end of the reverse osmosis tank (33) near the connector (36) is connected to a tenth connecting pipe (44). One end of the tenth connecting pipe (44) is provided with a tenth water pump (45).

3. The seawater desalination system according to claim 1, characterized in that: The self-cleaning mechanism includes a partition plate (13). The partition plate (13) is fixedly connected to the upper middle part of the self-cleaning filter (3). The inner wall of the bottom end of the self-cleaning filter (3) is connected to a filter screen (14) that is connected to the partition plate (13) through a bearing. The inner wall of the filter screen (14) is provided with a first cleaning brush (15) that is fixed to the inner wall of the self-cleaning filter (3). The first cleaning brush (15) is used to clean the inner wall of the filter screen (14). A second cleaning brush (16) that is fixedly connected to the self-cleaning filter (3) and the partition plate (13) is provided between the self-cleaning filter (3) and the filter screen (14). The second cleaning brush (16) is used to clean the filter material in the pores of the filter screen (14). One side of the first cleaning brush (15) and the second cleaning brush (16) are respectively attached to the inner wall and the surface of the filter screen (14). A circular toothed plate (17) is fixedly connected to the top of the filter screen (14). A first motor (18) is provided at the top of the self-cleaning filter (3). The output end of the first motor (18) is connected to the partition plate (13) through a bearing. A gear (19) that meshes with the circular toothed plate (17) is fixedly connected to the output end of the first motor (18). The control end of the first motor (18) is electrically connected to an external power source.

4. The seawater desalination system according to claim 2, characterized in that: The auxiliary mechanism includes a cleaning water tank (57). A cleaning water tank (57) is provided at one end of both the ultrafiltration unit (4) and the reverse osmosis support (7). A second security filter (58) is provided on one side of the cleaning water tank (57). An eleventh connecting pipe (59) connected to the second security filter (58) is connected to the bottom of the cleaning water tank (57). An eleventh water pump (60) is provided at one end of the eleventh connecting pipe (59). A twelfth connecting pipe (61) is connected to the bottom of each of the second security filters (58). A twelfth water pump (62) is provided at one end of each of the twelfth connecting pipes (61). A set of the twelfth connecting pipes (61)... One end of the 12th connecting pipe (61) is connected to the eighth connecting pipe (34), and one end of the other 12th connecting pipe (61) is connected to the ultrafiltration unit (4). One end of the reverse osmosis support (7) is provided with a first dosing tank (63), and one end of the 12th connecting pipe (61) is provided with a third three-way solenoid valve (64). One end of the first dosing tank (63) is connected to a 13th connecting rod (65) connected to the third three-way solenoid valve (64). The top of the ultrafiltration unit (4) is provided with a second dosing tank (66). The control terminals of the 11th water pump (60), the 12th water pump (62) and the third three-way solenoid valve (64) are all electrically connected to an external power source.

5. A seawater desalination system according to claim 4, characterized in that: The bottom end of the ultrafiltration unit (4) is connected to a fourth connecting pipe (22) connected to the pretreatment unit (1). A fourth water pump (23) is provided at one end of the fourth connecting pipe (22). The bottom end of the self-cleaning filter (3) is connected to a fifth connecting pipe (24) connected to the middle of the fourth connecting pipe (22). A fifth water pump (25) is provided at one end of the fifth connecting pipe (24). A first solenoid valve (26) is provided at the other end of the fifth connecting pipe (24). A first three-way solenoid valve (27) is provided at one end of the fourth connecting pipe (22). The output end of the first three-way solenoid valve (27) is connected to a first discharge pipe (28). The first three-way solenoid valve (27) is located between the fourth water pump (23) and the connection between the fifth connecting pipe (24) and the fourth connecting pipe (22). The control ends of the fourth water pump (23), the fifth water pump (25), the first solenoid valve (26) and the first three-way solenoid valve (27) are all electrically connected to an external power source.

6. A seawater desalination system according to claim 2, characterized in that: The reverse osmosis cleaning mechanism includes a connecting sleeve (46). A connecting sleeve (46) is provided inside one end of each reverse osmosis tank (33). A second motor (47) is provided at one end of each reverse osmosis tank (33). A reverse osmosis assembly (48) is provided inside the reverse osmosis tank (33). Support plates (49) are uniformly fixedly connected to the inner wall at the bottom of the reverse osmosis tank (33). A plug (50) located inside the connecting sleeve (46) is fixedly connected to one end of the reverse osmosis assembly (48). Slots (5) are uniformly provided on the surface of the plug (50). 1) The slot (51) is slidably connected to the insert plate (52) which is fixedly connected to the inner wall of the connecting sleeve (46). The connector (36) is connected to the rotating head (53) through the bearing. Limiting holes (54) are evenly opened at the separation of the inner diameters of the two ends of the rotating head (53). A stop plate (55) is slidably connected to the middle of the rotating head (53), and one end of the stop plate (55) is in contact with one end of the reverse osmosis assembly (48). A spring (56) is evenly fixedly connected to one end of the stop plate (55) and fixed to the inner wall of the limiting hole (54).

7. A seawater desalination system according to claim 6, characterized in that: The plug (50) is frustum-shaped, the inner wall of the connecting sleeve (46) is adapted to the shape of the plug (50), the length of the insert plate (52) is less than the length of the slot (51), the inner diameters of the two ends of the rotor (53) are different, one end of the reverse osmosis assembly (48) is slidably connected to one end of the rotor (53), the inner diameter of one end of the rotor (53) is adapted to the outer diameter of the reverse osmosis assembly (48), and the inner diameter of the end of the rotor (53) slidably connected to the reverse osmosis assembly (48) is larger than the other end.

8. A seawater desalination system according to claim 6, characterized in that: The output end of the second motor (47) is connected to the reverse osmosis tank (33) through a rotary seal. The output end of the second motor (47) is fixedly connected to one end of the connecting sleeve (46). The control end of the second motor (47) is electrically connected to an external power source.

9. A seawater desalination system according to claim 1, characterized in that: The inner wall of the bottom of the self-cleaning filter (3) is a concave arc shape.

10. A seawater desalination system according to claim 2, characterized in that: The control terminals of the first water pump (10), the second water pump (12), the third water pump (21), the sixth water pump (30), the seventh water pump (32), the eighth water pump (35), the ninth water pump (39), the second three-way solenoid valve (40), and the tenth water pump (45) are all electrically connected to an external power source.

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