Desalted water replenishing system for nuclear power plant

Abstract

The utility model relates to the technical field of water replenishing systems of nuclear power plants, and particularly discloses a desalted water replenishing system of a nuclear power plant, which comprises a first desalting assembly, a second desalting assembly, a reverse osmosis delivery pump, a delivery assembly and a desalted water storage tank. According to the desalted water replenishing system for the nuclear power plant, the desalted water in the first desalting assembly can be conveyed into the second desalting assembly through the reverse osmosis conveying pump, so that the water production amount of reverse osmosis is increased, and the situation that the water production effect of reverse osmosis is poor as the temperature of the water does not reach the optimal temperature is effectively avoided; the problems that in the prior art, a heater needs to be arranged, an auxiliary steam source needs to be added, the occupied area is large, and the equipment cost is high are solved. The first desalting assembly and the second desalting assembly are arranged, so that the desalting effect of water can be ensured; and the demineralized water storage tank is arranged, so that sufficient water amount of the demineralized water can be ensured, and the water supplementing requirement of the nuclear power unit is met.

Description

Technical Field

[0001] The utility model relates to the technical field of water replenishment systems for nuclear power plants, in particular to a demineralized water replenishment system for nuclear power plants. Background Art

[0002] Currently, nuclear power plant desalinated water systems typically use reverse osmosis systems to remove salt, ensuring the effluent meets certain quality standards for replenishment of nuclear power units. The temperature of the raw water significantly impacts the water output of the reverse osmosis system. The lower the temperature, the lower the water output. Maintaining the inlet temperature of the reverse osmosis system at around 25°C is generally necessary to ensure that the system's water output meets design requirements. During the cold winter months, nuclear power plants typically use warm condenser discharge water as their freshwater source, which typically has a temperature of around 10°C. Therefore, the condenser discharge water must be heated to around 25°C. This setup requires the installation of a heater and the addition of an auxiliary steam source, resulting in significant floor space and high equipment costs. Utility Model Content

[0003] The purpose of the utility model is to provide a demineralized water replenishment system for a nuclear power plant, so as to solve the problems in the prior art of requiring the arrangement of heaters and the addition of auxiliary steam sources, resulting in a large floor space and high equipment costs.

[0004] In order to solve the above problems, the utility model provides a desalted water replenishment system for a nuclear power plant, which includes a first desalination component, a second desalination component, a reverse osmosis delivery pump, a delivery component and a desalted water storage tank. The inlet of the first desalination component can be connected to a water supply device, the outlet of the first desalination component is connected to the inlet of the reverse osmosis delivery pump, the outlet of the reverse osmosis delivery pump is connected to the inlet of the second desalination component, the outlet of the second desalination component is connected to the inlet of the delivery component, the outlet of the delivery component is connected to the inlet of the desalted water storage tank, the outlet of the desalted water storage tank can be connected to a nuclear power unit, the first desalination component can desalinate water entering from the water supply device, the second desalination component can desalinate water entering from the reverse osmosis delivery pump, and the reverse osmosis delivery pump can deliver water to the second desalination component.

[0005] As the preferred technical solution for the desalted water make-up system of a nuclear power plant, the reverse osmosis delivery pump is a variable frequency reverse osmosis high-pressure pump.

[0006] As the preferred technical solution for the desalted water make-up system of a nuclear power plant, the conveying component includes a desalted water conveying pump and a conveying pipe group. The inlet of the desalted water conveying pump and the outlet of the second desalting component can be connected on and off. The outlet of the desalted water conveying pump and the inlet of the conveying pipe group can be connected on and off. The outlet of the conveying pipe group is connected to the inlet of the desalted water storage tank.

[0007] As the preferred technical solution for the desalted water replenishment system of a nuclear power plant, multiple pumps are used to transport the desalted water.

[0008] As the preferred technical solution for the desalted water make-up system of a nuclear power plant, the delivery pipe group includes a first delivery pipe and a second delivery pipe. The inlet of the first delivery pipe and the inlet of the second delivery pipe are both connected to the outlet of the desalted water pump in a switchable manner, and the outlet of the first delivery pipe and the outlet of the second delivery pipe are both connected to the inlet of the desalted water storage tank.

[0009] As the preferred technical solution for the desalted water make-up system of a nuclear power plant, the desalted water make-up system of a nuclear power plant also includes a flow meter and a water quality detection component arranged on the delivery pipe group. The flow meter is used to monitor the flow rate of water in the delivery pipe group, and the water quality detection component is used to monitor the water quality of the water in the delivery pipe group.

[0010] As the preferred technical solution for the desalted water make-up system of a nuclear power plant, the water quality detection component includes a pH meter, a conductivity meter and a silica meter arranged on the delivery pipe group. The pH meter is used to detect the pH value of the water in the delivery pipe group, the conductivity meter is used to detect the conductivity of the water in the delivery pipe group, and the silica meter is used to detect the silica content of the water in the delivery pipe group.

[0011] As a preferred technical solution for the desalted water make-up system of a nuclear power plant, the first desalination component includes a flocculation clarifier, a first desalination unit and a fresh water tank connected in sequence. The flocculation clarifier is connected to the water supply equipment, and the fresh water tank is connected to the inlet of the reverse osmosis delivery pump. The flocculation clarifier can remove suspended matter in the water entering from the water supply equipment, the first desalination unit can desalinate the water entering from the flocculation clarifier, and the fresh water tank can desalinate the water entering from the first desalination unit.

[0012] As an optimal technical solution for the desalted water replenishment system of a nuclear power plant, the first desalination component also includes a fresh water tank, the inlet of the fresh water tank is connected to the outlet of the flocculation clarification tank, and the outlet of the fresh water tank is connected to the inlet of the first desalination unit.

[0013] As an optimal technical solution for the desalted water make-up system of a nuclear power plant, the second desalination component includes a reverse osmosis device and a second desalination unit that are interconnected. The reverse osmosis device is connected to the outlet of the reverse osmosis delivery pump, and the second desalination unit is connected to the inlet of the delivery component. The reverse osmosis device can remove ions in the water entering from the reverse osmosis delivery pump, and the second desalination unit can desalinate the water entering from the reverse osmosis device.

[0014] The beneficial effects of the utility model are:

[0015] The utility model provides a desalted water replenishment system for a nuclear power plant, comprising a first desalination component, a second desalination component, a reverse osmosis delivery pump, a delivery component, and a desalted water storage tank. The desalted water replenishment system for a nuclear power plant of the utility model can be used to deliver desalinated water in the first desalination component to the second desalination component via the reverse osmosis delivery pump, thereby increasing the reverse osmosis water production capacity and effectively avoiding the problem of poor reverse osmosis water production due to water temperature not reaching the optimal temperature. This solves the problem of the prior art requiring the arrangement of a heater and the addition of an auxiliary steam source, resulting in a large footprint and high equipment costs. Furthermore, the first and second desalination components are provided to ensure the desalination effect of the water, and the desalted water storage tank is provided to ensure a sufficient amount of desalted water to meet the water replenishment requirements of the nuclear power unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of a desalted water replenishment system for a nuclear power plant in an embodiment of the present invention.

[0017] In the picture:

[0018] 1. First desalination unit; 11. Flocculation clarification tank; 12. First desalination unit; 13. Fresh water tank; 14. Fresh water tank;

[0019] 2. Second desalination assembly; 21. Reverse osmosis device; 22. Second desalination unit; 221. Anion bed; 222. Cation bed; 223. Mixed bed;

[0020] 3. Reverse osmosis delivery pump;

[0021] 4. Delivery assembly; 41. Desalted water delivery pump; 42. Delivery pipe assembly; 421. First delivery pipe; 422. Second delivery pipe;

[0022] 5. Desalted water storage tank;

[0023] 51. Flow meter; 52. Water quality detection component; 521. pH meter; 522. Conductivity meter; 523. Silicon meter; 53. Pressure gauge. DETAILED DESCRIPTION

[0024] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a specific position, be constructed and operated in a specific position, and therefore should not be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0026] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0027] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0028] like Figure 1As shown, this embodiment provides a demineralized water replenishment system for a nuclear power plant, comprising a first demineralizer 1, a second demineralizer 2, a reverse osmosis delivery pump 3, a delivery assembly 4, and a demineralized water storage tank 5. The inlet of the first demineralizer 1 is connected to a water supply device, the outlet of the first demineralizer 1 is connected to the inlet of the reverse osmosis delivery pump 3, the outlet of the reverse osmosis delivery pump 3 is connected to the inlet of the second demineralizer 2, the outlet of the second demineralizer 2 is connected to the inlet of the delivery assembly 4, the outlet of the delivery assembly 4 is connected to the inlet of the demineralized water storage tank 5, and the outlet of the demineralized water storage tank 5 is connected to the nuclear power unit. The first demineralizer 1 can demineralize water entering from the water supply device, and the second demineralizer 2 can demineralize water entering from the reverse osmosis delivery pump 3.

[0029] By adopting the desalted water replenishment system for a nuclear power plant of the present invention, the water after desalination treatment in the first desalination component 1 can be transported to the second desalination component 2 through the reverse osmosis delivery pump 3, thereby improving the water production of the reverse osmosis, avoiding the situation where the reverse osmosis water production effect is poor due to the water temperature not reaching the optimal temperature, and effectively solving the problem of the need to arrange heaters and increase auxiliary steam sources in the prior art, resulting in a large footprint and high equipment cost; and the first desalination component 1 and the second desalination component 2 are provided to ensure the desalination effect of the water; and the desalted water storage tank 5 is provided to ensure that the amount of desalted water is sufficient to meet the water replenishment requirements of the nuclear power unit.

[0030] In this embodiment, the reverse osmosis delivery pump 3 is configured as a variable frequency reverse osmosis high-pressure pump. This increases the pump head to improve the reverse osmosis water production, thereby resolving the problem of insufficient reverse osmosis water production due to low water temperatures in winter. Furthermore, the pump head can be flexibly adjusted. In the summer, when water temperatures are relatively high, the pump frequency can be reduced to save electricity and achieve the goal of energy conservation and consumption reduction.

[0031] In some embodiments, the delivery assembly 4 includes a desalted water delivery pump 41 and a delivery pipe assembly 42. The inlet of the desalted water delivery pump 41 and the outlet of the second desalting assembly 2 are connected in a disconnectable manner, and the outlet of the desalted water delivery pump 41 and the inlet of the delivery pipe assembly 42 are connected in a disconnectable manner. In this way, the water desalted by the second desalting assembly 2 can be delivered to the delivery pipe assembly 42. Since the outlet of the delivery pipe assembly 42 is connected to the inlet of the desalted water storage tank 5, the water can be delivered to the desalted water storage tank 5 for storage through the delivery pipe assembly 42.

[0032] Optionally, the delivery pipe group 42 may include multiple delivery pipes to improve delivery efficiency.

[0033] Specifically, there are multiple desalted water delivery pumps 41, and the inlets of the multiple desalted water delivery pumps 41 are connected to the outlet of the second desalination component 2 in a switchable manner, and the outlets of the multiple desalted water delivery pumps 41 are connected to the inlet of the delivery pipe group 42 in a switchable manner, which can improve the delivery efficiency.

[0034] In this embodiment, the delivery pipe assembly 42 includes a first delivery pipe 421 and a second delivery pipe 422. The inlet of the first delivery pipe 421 and the inlet of the second delivery pipe 422 are both connected to the outlet of the desalted water delivery pump 41 in a removable manner. Furthermore, the outlets of the first delivery pipe 421 and the second delivery pipe 422 are both connected to the inlet of the desalted water storage tank 5. This arrangement prevents the first delivery pipe 421 or the second delivery pipe 422 from rupturing, or the desalted water delivery pump 41 from damaging, which could prevent the unit from being properly replenished with water.

[0035] Optionally, the delivery assembly 4 includes a first control valve, a second control valve, a third control valve, and a fourth control valve. The first control valve is disposed on the pipeline connecting the inlet of the desalted water delivery pump 41 and the outlet of the second desalted water assembly 2. The first control valve can control the entry of water into the desalted water delivery pump 41. The second control valve is disposed on the pipeline connecting the outlet of the desalted water delivery pump 41 and the inlet of the delivery pipe assembly 42. The second control valve can control the entry of water into the delivery pipe assembly 42. The third control valve is disposed on the first delivery pipe 421. The third control valve can control the opening and closing of the first delivery pipe 421. The fourth control valve is disposed on the second delivery pipe 422. The third control valve can control the opening and closing of the second delivery pipe 422. By switching the first, second, third, and fourth control valves, different desalted water delivery pumps 41 can be put into operation to replenish water to the nuclear power unit.

[0036] Optionally, the first control valve, the second control valve, the third control valve and the fourth control valve are all butterfly valves.

[0037] Optionally, the delivery component 4 includes a check valve, the inlet of the check valve is connected to the outlet of the desalted water delivery pump 41, and the outlet of the check valve is connected to the second control valve.

[0038] In some embodiments, the desalted water replenishment system of a nuclear power plant further includes a flow meter 51 and a water quality detection assembly 52 disposed on the delivery pipe assembly 42. The flow meter 51 can monitor the flow rate of water in the delivery pipe assembly 42, and the water quality detection assembly 52 can monitor the water quality of the water in the delivery pipe assembly 42.

[0039] Furthermore, the water quality detection assembly 52 includes a pH meter 521, a conductivity meter 522, and a silicon meter 523, which are arranged on the delivery pipe assembly 42. The pH meter 521 can detect the pH value (i.e., the acidity or alkalinity) of the water in the delivery pipe assembly 42, the conductivity meter 522 can detect the conductivity of the water in the delivery pipe assembly 42, and the silicon meter 523 can detect the silicon content of the water in the delivery pipe assembly 42, thereby ensuring that the water in the delivery pipe assembly 42 meets the required water quality.

[0040] Among them, the pH meter is a precision instrument used to measure the acidity and alkalinity of a solution.

[0041] Optionally, the water quality detection component 52 further includes a pressure gauge 53 provided on the delivery pipe assembly 42 , and the pressure gauge 53 can detect the pressure value of the water in the delivery pipe assembly 42 .

[0042] Optionally, the desalted water make-up system of the nuclear power plant also includes a controller, and the flow meter 51, pH meter 521, pressure gauge 53, conductivity meter 522 and silicon meter 523 are all electrically connected to the controller, and the controller can receive signals detected by the flow meter 51, pH meter 521, pressure gauge 53, conductivity meter 522 and silicon meter 523.

[0043] In this embodiment, the first desalination assembly 1 includes a flocculation and clarification tank 11, a first desalination unit 12, and a freshwater tank 13, which are sequentially connected. The flocculation and clarification tank 11 is connected to the water supply, and the freshwater tank 13 is connected to the inlet of the reverse osmosis delivery pump 3. The flocculation and clarification tank 11 is provided to remove suspended matter from the water entering from the water supply. The first desalination unit 12 is provided to desalinate the water entering from the flocculation and clarification tank 11, and the freshwater tank 13 is used to desalinate the water entering from the first desalination unit 12.

[0044] Among them, the first desalination unit 12 includes but is not limited to a unit system and a mother pipe system. The unit system is composed of a cation bed, a decarbonizer, an intermediate water tank, an anion bed, and a mixed bed to form a unit. Its main advantages include: easy water quality control, good effluent quality, and high reliability. The unit system combines various treatment units together to form an independent treatment module, which can better control water quality and ensure effluent quality, and due to its structural design, it has high reliability. The mother pipe system is to form a system for desalination treatment by connecting multiple treatment units in parallel or in series on a main pipeline. The advantage of this system is that it can adapt to a larger processing volume and is convenient for system expansion and maintenance.

[0045] Furthermore, the first desalination assembly 1 further includes a fresh water tank 14, the inlet of the fresh water tank 14 is connected to the outlet of the flocculation clarification tank 11, and the outlet of the fresh water tank 14 is connected to the inlet of the first desalination unit 12. The fresh water tank 14 is provided to desalinate the water entering from the flocculation clarification tank 11.

[0046] In this embodiment, the second desalination component 2 includes a reverse osmosis device 21 and a second desalination unit 22 that are interconnected. The reverse osmosis device 21 is connected to the outlet of the reverse osmosis delivery pump 3, and the second desalination unit 22 is connected to the inlet of the delivery component 4. The reverse osmosis device 21 can remove ions in the water entering from the reverse osmosis delivery pump 3, and the second desalination unit 22 can desalinate the water entering from the reverse osmosis device 21.

[0047] Among them, the second desalination unit 22 includes an anion bed 221, a cation bed 222 and a mixed bed 223 connected in sequence, the reverse osmosis device 21 is connected to the outlet of the reverse osmosis delivery pump 3, and the mixed bed 223 is connected to the inlet of the delivery component 4. The reverse osmosis device 21 can remove ions in the water entering from the reverse osmosis delivery pump 3.

[0048] Optionally, the main function of the reverse osmosis device 21 includes removing impurities such as ions, organic matter, bacteria, viruses, etc. in water, thereby producing high-purity water.

[0049] The working principle of the desalted water replenishment system of the nuclear power plant of the utility model is as follows:

[0050] The desalinated water makeup system for this nuclear power plant uses desalinated seawater from the first desalination unit as its freshwater source. It then undergoes secondary desalination through reverse osmosis in the second desalination unit, providing water for the nuclear power units. The desalination system pre-treats seawater through flocculation and sedimentation in a flocculation clarification tank. The water then passes through the first desalination unit for desalination, before being stored in a freshwater tank. The water is then pressurized by a variable frequency reverse osmosis high-pressure pump and then enters the reverse osmosis unit for desalination. Further desalination occurs through an anion bed, a cation bed, and a mixed bed, resulting in qualified desalinated water. This water is then pressurized by a desalinated water delivery pump and then transferred to a desalinated water storage tank for storage.

[0051] Since desalted water needs to be continuously provided to the secondary circuit for water replenishment during the operation of the nuclear power plant, the reliability requirements of the desalted water replenishment system of the nuclear power plant are relatively high. It must be ensured that the desalted water replenishment system of the nuclear power plant can continuously prepare desalted water to meet the water replenishment requirements of the unit.

[0052] The advantages of this utility model are as follows:

[0053] 1. This utility model uses a variable frequency reverse osmosis high-pressure pump to increase the pump head and the number of reverse osmosis membranes to improve the reverse osmosis output, solving the problem of low water temperature in winter and insufficient water output. The variable frequency reverse osmosis high-pressure pump can flexibly adjust the pump head. In the summer when the water temperature is relatively high, the frequency of the reverse osmosis high-pressure pump can be reduced, saving electricity and achieving the goal of energy saving and consumption reduction.

[0054] 2. The design of the primary and secondary delivery pipes solves the problem of failure to properly replenish water to the nuclear power unit due to rupture of the primary and secondary delivery pipes or failure of the desalted water delivery pump. Different valves are installed in the delivery pipe group to isolate the valves according to the inspection and maintenance status of the desalted water delivery pump, without affecting the operation of other desalted water delivery pumps.

[0055] 3. By recycling desalted water and concentrated brine, the problem of concentrated water discharge from desalted water reverse osmosis can be solved, while avoiding water waste.

[0056] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A demineralized water replenishment system for a nuclear power plant, characterized in that: The invention comprises a first desalination component (1), a second desalination component (2), a reverse osmosis delivery pump (3), a delivery component (4) and a desalted water storage tank (5), wherein the inlet of the first desalination component (1) can be communicated with a water supply device, the outlet of the first desalination component (1) can be communicated with the inlet of the reverse osmosis delivery pump (3), the outlet of the reverse osmosis delivery pump (3) can be communicated with the inlet of the second desalination component (2), the outlet of the second desalination component (2) can be communicated with the inlet of the delivery component (4), the outlet of the delivery component (4) can be communicated with the inlet of the desalted water storage tank (5), the outlet of the desalted water storage tank (5) can be communicated with a nuclear power unit, the first desalination component (1) can desalinate water entering from the water supply device, the second desalination component (2) can desalinate water entering from the reverse osmosis delivery pump (3), and the reverse osmosis delivery pump (3) can deliver water to the second desalination component (2).

2. The desalted water replenishment system for a nuclear power plant according to claim 1, characterized in that: The reverse osmosis delivery pump (3) is a variable frequency reverse osmosis high-pressure pump.

3. The desalted water replenishment system for a nuclear power plant according to claim 1, characterized in that: The conveying assembly (4) comprises a desalted water conveying pump (41) and a conveying pipe assembly (42); the inlet of the desalted water conveying pump (41) and the outlet of the second desalting assembly (2) can be connected in a disconnectable manner; the outlet of the desalted water conveying pump (41) and the inlet of the conveying pipe assembly (42) can be connected in a disconnectable manner; and the outlet of the conveying pipe assembly (42) is connected to the inlet of the desalted water storage tank (5).

4. The desalted water replenishment system for a nuclear power plant according to claim 3, characterized in that: There are multiple desalted water delivery pumps (41).

5. The desalted water replenishment system for a nuclear power plant according to claim 3, characterized in that: The delivery pipe group (42) includes a first delivery pipe (421) and a second delivery pipe (422). The inlet of the first delivery pipe (421) and the inlet of the second delivery pipe (422) are both connected to the outlet of the desalted water delivery pump (41) in a disconnectable manner. The outlet of the first delivery pipe (421) and the outlet of the second delivery pipe (422) are both connected to the inlet of the desalted water storage tank (5).

6. The desalted water replenishment system for a nuclear power plant according to claim 3, characterized in that: The desalted water replenishment system of the nuclear power plant further comprises a flow meter (51) and a water quality detection component (52) arranged on the delivery pipe group (42), wherein the flow meter (51) is used to monitor the flow rate of water in the delivery pipe group (42), and the water quality detection component (52) is used to monitor the water quality of the water in the delivery pipe group (42).

7. The desalted water replenishment system for a nuclear power plant according to claim 6, characterized in that: The water quality detection component (52) comprises a pH meter (521), a conductivity meter (522) and a silicon meter (523) arranged on the delivery pipe assembly (42); the pH meter (521) is used to detect the pH value of the water in the delivery pipe assembly (42); the conductivity meter (522) is used to detect the conductivity of the water in the delivery pipe assembly (42); and the silicon meter (523) is used to detect the silicon content of the water in the delivery pipe assembly (42).

8. The desalted water replenishment system for a nuclear power plant according to claim 1, characterized in that: The first desalination component (1) comprises a flocculation clarification tank (11), a first desalination unit (12) and a fresh water tank (13) which are connected in sequence. The flocculation clarification tank (11) is connected to the water supply equipment, and the fresh water tank (13) is connected to the inlet of the reverse osmosis delivery pump (3). The flocculation clarification tank (11) can remove suspended matter in the water entering from the water supply equipment, the first desalination unit (12) can desalinate the water entering from the flocculation clarification tank (11), and the fresh water tank (13) can desalinate the water entering from the first desalination unit (12).

9. The desalted water replenishment system for a nuclear power plant according to claim 8, characterized in that: The first desalination assembly (1) further comprises a fresh water tank (14), the inlet of the fresh water tank (14) being connected to the outlet of the flocculation clarification tank (11), and the outlet of the fresh water tank (14) being connected to the inlet of the first desalination unit (12).

10. The demineralized water replenishment system for a nuclear power plant according to any one of claims 1 to 9, characterized in that: The second desalination component (2) comprises a reverse osmosis device (21) and a second desalination unit (22) which are interconnected. The reverse osmosis device (21) is connected to the outlet of the reverse osmosis delivery pump (3), and the second desalination unit (22) is connected to the inlet of the delivery component (4). The reverse osmosis device (21) can remove ions in the water entering from the reverse osmosis delivery pump (3), and the second desalination unit (22) can desalinate the water entering from the reverse osmosis device (21).

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