Seawater desalination system

Abstract

The utility model discloses a seawater desalination system which comprises a booster pump, a first filter, a second filter, a plunger pump and a reverse osmosis membrane group which are connected in sequence, the input end of the booster pump is provided with a raw water channel and a first cleaning channel which are arranged in parallel, the raw water channel is connected with a raw water tank and a normally-open first switch valve, and the first cleaning channel is connected with a cleaning water tank and a second switch valve; the reverse osmosis membrane group is provided with a first output end and a second output end; the first output end is connected with a clear liquid passage, and the clear liquid passage is provided with a normally open third switch valve; the second output end is connected with a concentrated water passage, and the concentrated water passage is provided with a normally-open fourth switch valve; the clear liquid passage is connected with a water producing tank; the first output end is further connected with a second cleaning passage connected with the clear liquid passage in parallel, and the second cleaning passage is provided with a normally-closed fifth switch valve; the seawater desalination efficiency is improved, the desalination effect is guaranteed, and the cleaning operation is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of seawater desalination, in particular to a seawater desalination system. Background Art

[0002] Desalination systems, which convert seawater into fresh water, are crucial for addressing global water shortages, particularly in arid, desert, or island regions.

[0003] In the actual application of the seawater desalination system, due to the presence of suspended matter or colloidal substances such as large particles, sediments and other impurities in the seawater; during the desalination process, these suspended matter or colloidal substances gradually accumulate in the equipment of the seawater desalination system, resulting in the desalination effect of the seawater desalination system to deteriorate and even cause blockage. Therefore, the seawater desalination system needs to be cleaned.

[0004] However, existing methods for cleaning seawater desalination systems often involve disassembling and cleaning or replacing the equipment in the seawater desalination system, which affects the effect of seawater desalination and is inconvenient to clean. Utility Model Content

[0005] The purpose of the present invention is to overcome the above-mentioned shortcomings and provide a seawater desalination system to improve the seawater desalination efficiency and help ensure the desalination effect, and make the cleaning operation more convenient.

[0006] To achieve the above purpose, the specific solutions of the present utility model are as follows:

[0007] A seawater desalination system comprises a booster pump, a first filter, a second filter, a plunger pump and a reverse osmosis membrane group connected in sequence;

[0008] The booster pump has an input end provided with a raw water passage and a first cleaning passage arranged in parallel, the raw water passage is connected to a raw water tank and a normally open first switch valve, and the first cleaning passage is connected to a cleaning water tank and a second switch valve; the reverse osmosis membrane group has a first output end and a second output end;

[0009] The first output end is connected to a clear liquid passage, which is provided with a normally open third switch valve; the second output end is connected to a concentrated water passage, which is provided with a normally open fourth switch valve; the clear liquid passage is connected to a production water tank, which is connected to a water supply pump, which is connected to the water supply passage; the first output end is also connected to a second cleaning passage in parallel with the clear liquid passage, which is provided with a normally closed fifth switch valve.

[0010] The present invention is further configured such that a normally closed first electric gate valve is connected between the second switch valve and the input end of the booster pump, and the second switch valve is normally open.

[0011] The utility model is further configured such that the seawater desalination system further includes a scale inhibition and dosing system connected in parallel with the first filter.

[0012] The present invention is further configured such that the input end of the booster pump is connected to a normally open second electric gate valve and a sixth switch valve which are connected in series with the raw water passage and the cleaning passage.

[0013] The present invention is further configured such that the second output end is also connected to a third cleaning passage in parallel with the concentrated water passage, and the third cleaning passage is connected to a normally closed third electric gate valve.

[0014] The present invention is further configured such that the first filter is a bag filter and the second filter is a safety filter.

[0015] The utility model is further configured such that the water production tank is connected to a water supply pump, and the water supply pump is connected to a water supply passage.

[0016] The present invention is further configured such that a normally open seventh switch valve is provided between the water supply pump and the water production tank.

[0017] The utility model is further configured such that the seawater desalination system further includes a disinfection system connected to both the water production tank and the water supply passage.

[0018] The beneficial effects of the utility model are as follows: the utility model provides a first cleaning passage in parallel with the raw water passage and a second cleaning passage in parallel with the clear liquid passage, so that when cleaning is required, the seawater desalination system can be regularly cleaned by controlling the switching states of the first switch valve, the second switch valve, the third switch valve, the fourth switch valve and the fifth switch valve, so as to improve the seawater desalination efficiency and ensure the desalination effect, and the cleaning operation is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of the utility model;

[0020] Explanation of the accompanying symbols: 1. Raw water tank; 11. Raw water passage; 12. First switch valve; 2. Booster pump; 21. Second electric gate valve; 22. Sixth switch valve; 3. First filter; 4. Second filter; 5. Plunger pump; 6. Reverse osmosis membrane group; 61. Clear liquid passage; 611. Third switch valve; 62. Concentrated water passage; 621. Fourth switch valve; 63. Second cleaning passage; 631. Fifth switch valve; 64. Third cleaning passage; 641. Third electric gate valve; 7. Cleaning water tank; 71. First cleaning passage; 72. Second switch valve; 73. First electric gate valve; 8. Product water tank; 9. Scale inhibition and dosing system; 10. Water supply pump; 101. Water supply passage; 102. Seventh switch valve; 20. Disinfection system. DETAILED DESCRIPTION

[0021] The present invention will be further described below in detail with reference to the accompanying drawings and specific embodiments, but the scope of implementation of the present invention is not limited thereto.

[0022] like Figure 1 As shown, a seawater desalination system according to this embodiment is applied to the desalination of seawater, and includes a booster pump 2, a first filter 3, a second filter 4, a plunger pump 5 and a reverse osmosis membrane group 6 connected in sequence;

[0023] The input end of the booster pump 2 is provided with a raw water passage 11 and a first cleaning passage 71 arranged in parallel. The raw water passage is connected to the raw water tank 1 and the normally open first switch valve 12. The first cleaning passage 71 is connected to the cleaning water tank 7 and the second switch valve 72. The reverse osmosis membrane group 6 has a first output end and a second output end.

[0024] The first output end is connected to a clean liquid passage 61, which is provided with a normally open third switch valve 611; the second output end is connected to a concentrated water passage 62, which is provided with a normally open fourth switch valve 621; the clean liquid passage 61 is connected to a production water tank 8, which is connected to a water supply pump 10, which is connected to a water supply passage 101; the first output end is also connected to a second cleaning passage 63 in parallel with the clean liquid passage 61, and the second cleaning passage 63 is provided with a normally closed fifth switch valve 631.

[0025] Specifically, when the seawater desalination system of this embodiment performs seawater desalination treatment, the booster pump 2 works to pump seawater from the raw water tank 1 to the raw water passage 11. The seawater enters the first filter 3 after passing through the booster pump 2. The suspended matter and colloidal substances in the seawater are filtered through the first filter 3 and the second filter 4. The filtered seawater is pressurized by the plunger pump 5 and enters the reverse osmosis membrane group 6. After filtering through the reverse osmosis membrane group 6, the first output end of the reverse osmosis membrane group 6 outputs a clear liquid, which enters the production water tank 8 through the clear liquid passage 61. When the water supply pump 10 works, the water supply pump 10 pumps the clear liquid in the production water tank 8 outward to meet domestic water needs; at the same time, the second output end of the reverse osmosis membrane group 6 outputs concentrated water. The seawater desalination treatment is continuously performed in this way.

[0026] When the desalination system needs to be cleaned, the first switch valve 12 is closed and the second switch valve 72 is in the open state, so that the first cleaning passage 71 is in a connected state with the boost pump 2, the third switch valve 611 and the fourth switch valve 621 are closed, and the fifth switch valve 631 is opened. At this time, under the operation of the boost pump 2, the cleaning liquid in the cleaning water tank 7 flows into the first cleaning passage 71, and then enters the first filter 3, the second filter 4, the plunger pump 5, and the reverse osmosis membrane group 6 in turn after passing through the boost pump 2, thereby cleaning the boost pump 2, the first filter 3, the second filter 4, the plunger pump 5, and the reverse osmosis membrane group 6. After cleaning, the cleaning liquid is discharged through the second cleaning passage 63, so there is no need to disassemble each device for cleaning, and the cleaning operation is more convenient.

[0027] In this embodiment, by providing a first cleaning passage 71 connected in parallel with the raw water passage 11 and a second cleaning passage 63 connected in parallel with the clear liquid passage 61, the desalination system can be regularly cleaned by controlling the switching states of the first on-off valve 12, the second on-off valve 72, the third on-off valve 611, the fourth on-off valve 621, and the fifth on-off valve 631 when cleaning is required, thereby improving the desalination efficiency and ensuring the desalination effect, and making the cleaning operation more convenient.

[0028] like Figure 1 As shown, in some embodiments of the seawater desalination system described in this embodiment, a normally closed first electric gate valve 73 is connected between the second on-off valve 72 and the input end of the booster pump 2, while the second on-off valve 72 is normally open. In this embodiment, by providing the first electric gate valve 73, the opening of the first electric gate valve 73 can control the opening and closing of the first cleaning passage 71, thereby cleaning the seawater desalination system.

[0029] like Figure 1 As shown, in some embodiments of the seawater desalination system described in this embodiment, the seawater desalination system further includes a scale inhibitor and dosing system 9 connected in parallel with the first filter 3. With this arrangement, during seawater desalination, scale inhibitors are added to the seawater after being filtered by the first filter 3 via the scale inhibitor and dosing system 9 to reduce the probability of scaling in the second filter 4 and the reverse osmosis membrane assembly 6, thereby extending the service life of the seawater desalination system.

[0030] like Figure 1 As shown, in some embodiments of the seawater desalination system described in this embodiment, the input end of the booster pump 2 is connected to a normally open second electric gate valve 21 and a sixth on-off valve 22, which are connected in series with the raw water passage 11 and the cleaning passage. In this embodiment, the second electric gate valve 21 and the sixth on-off valve 22 are provided to control the opening and closing of the input end of the booster pump 2, thereby facilitating subsequent maintenance operations on the booster pump 2, the first filter 3, the second filter 4, the plunger pump 5, and the reverse osmosis membrane assembly 6.

[0031] like Figure 1 As shown, in some embodiments of the seawater desalination system described in this embodiment, a normally open seventh on-off valve 102 is provided between the water supply pump 10 and the water production tank 8. In this embodiment, the seventh on-off valve 102 is provided to control the on-off connection between the water supply pump 10 and the water production tank 8 to perform maintenance operations.

[0032] like Figure 1 As shown, in some embodiments of the seawater desalination system described in this embodiment, the second output end is further connected to a third cleaning passage 64 connected in parallel with the concentrated water passage 62. The third cleaning passage 64 is connected to a normally closed third electric gate valve 641. By providing the third cleaning passage 64 in this embodiment, when cleaning the seawater desalination system, the third electric gate valve 641 is opened and the fourth on-off valve 621 is closed, allowing the cleaning liquid passing through the second output end of the reverse osmosis membrane group 6 to flow out of the third cleaning passage 64 for discharge, thereby achieving more thorough cleaning of the reverse osmosis membrane group 6 and better cleaning results.

[0033] In the seawater desalination system described in this embodiment, in some embodiments, the first filter 3 is a bag filter, which has the characteristics of small structure and volume, simple and flexible operation, energy saving, high efficiency, and easy maintenance, so as to perform coarse filtration of seawater; the second filter 4 is a security filter, so as to perform fine filtration of seawater.

[0034] like Figure 1 As shown, in some embodiments of the seawater desalination system described in this embodiment, the seawater desalination system further includes a disinfection system 20 connected to both the production water tank 8 and the water supply passage 101. In this embodiment, the disinfection system 20 is provided to disinfect the clear liquid in the water supply passage 101 and the clear liquid in the production water tank 8 to further ensure water safety.

[0035] The above is only a preferred embodiment of the present invention. Therefore, any equivalent changes or modifications made according to the structure, features and principles described in the scope of the present invention patent application are included in the scope of protection of the present invention patent application.

Claims

1. A seawater desalination system, characterized in that: It includes a booster pump, a first filter, a second filter, a plunger pump and a reverse osmosis membrane group connected in sequence; The booster pump has an input end provided with a raw water passage and a first cleaning passage arranged in parallel, the raw water passage is connected to a raw water tank and a normally open first switch valve, and the first cleaning passage is connected to a cleaning water tank and a second switch valve; the reverse osmosis membrane group has a first output end and a second output end; The first output end is connected to a clear liquid passage, which is provided with a normally open third switch valve; the second output end is connected to a concentrated water passage, which is provided with a normally open fourth switch valve; the clear liquid passage is connected to a production water tank; the first output end is also connected to a second cleaning passage in parallel with the clear liquid passage, which is provided with a normally closed fifth switch valve.

2. A seawater desalination system according to claim 1, characterized in that: A normally closed first electric gate valve is connected between the second switch valve and the input end of the booster pump, and the second switch valve is normally open.

3. A seawater desalination system according to claim 1, characterized in that: The seawater desalination system further includes a scale inhibition and dosing system connected in parallel with the first filter.

4. A seawater desalination system according to claim 1, characterized in that: The input end of the booster pump is connected to a normally open second electric gate valve and a sixth switch valve which are connected in series with the raw water passage and the cleaning passage.

5. A seawater desalination system according to claim 1, characterized in that: The second output end is further connected to a third cleaning passage in parallel with the concentrated water passage, and the third cleaning passage is connected to a normally closed third electric gate valve.

6. A seawater desalination system according to claim 1, characterized in that: The first filter is a bag filter, and the second filter is a security filter.

7. A seawater desalination system according to claim 1, characterized in that: The water production tank is connected to a water supply pump, and the water supply pump is connected to a water supply passage.

8. A seawater desalination system according to claim 7, characterized in that: A normally open seventh switch valve is provided between the water supply pump and the water production tank.

9. A seawater desalination system according to claim 7, characterized in that: The seawater desalination system further comprises a disinfection system connected to both the water production tank and the water supply passage.

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