Seawater treatment system and nuclear power unit

Abstract

The utility model provides a seawater treatment system and a nuclear power unit, the seawater treatment system comprises filtering equipment, pharmaceutical equipment, storage equipment and a medicine outlet pipe, a filtering inlet of the filtering equipment is communicated with sea, and a first filtering outlet is communicated with an external loop; a pharmaceutical inlet of the pharmaceutical equipment is communicated with the second filtering outlet, and a pharmaceutical outlet is used for discharging liquid medicine obtained through production; the height of the storage inlet of the storage equipment is lower than that of the pharmaceutical outlet, and the height of the storage outlet is lower than that of the liquid level in the storage cavity; one end of the medicine outlet pipe is communicated with the storage outlet, the other end of the medicine outlet pipe is provided with a pipe outlet, the pipe outlet is lower than the liquid level in the storage cavity, and the pipe outlet is communicated with an external loop. The heights of the medicine outlet, the storage inlet and the pipe outlet are sequentially reduced, liquid medicine flowing out of the medicine outlet can flow into an external loop only by means of gravity, and an injection pump does not need to be additionally arranged in the system to provide flowing power for the liquid medicine.

Description

Technical Field

[0001] This application belongs to the field of nuclear power technology, and more specifically, relates to a seawater treatment system and a nuclear power unit. Background Art

[0002] To prevent the growth of marine organisms in various equipment of a nuclear power unit, chlorination treatment of circulating water is an effective measure. A seawater treatment system is usually provided in a nuclear power unit. This system chemically treats seawater to obtain sodium hypochlorite solution with a concentration of 1 gram per liter, and injects the produced solution into each loop of the nuclear power unit (such as a circulating water filtration system, a circulating water system, a nuclear island emergency water system, etc.). Sodium hypochlorite can inhibit the reproduction of marine organisms or kill their larvae and spores to protect the system equipment in contact with seawater from marine biological pollution.

[0003] Currently, the seawater treatment system uses an injection pump to add the produced sodium hypochlorite solution to each loop of the nuclear power unit. Since sodium hypochlorite has strong corrosiveness, the injection pump is prone to damage. Therefore, it is necessary to frequently overhaul or replace the injection pump, which greatly increases the workload of personnel. Moreover, during the inspection and replacement period, the valve of the pipeline where the injection pump is located needs to be closed, and the sodium hypochlorite solution cannot be introduced into the loop for disinfection. During this period, the activity of marine organisms in seawater cannot be inhibited, which is not conducive to protecting the system equipment in each loop. Summary of the Utility Model

[0004] The purpose of the embodiments of this application is to provide a seawater treatment system and a nuclear power unit to solve the technical problems in the prior art that the injection pump in the seawater treatment system is prone to damage and the workload of overhauling and replacing the injection pump is large.

[0005] To achieve the above purpose, the technical solution adopted in this application is:

[0006] In the first aspect, a seawater treatment system is provided, including:

[0007] A filtering device having a filtering inlet and a first filtering outlet, where the filtering inlet is used to introduce seawater;

[0008] A pharmaceutical manufacturing device having a pharmaceutical manufacturing inlet and a pharmaceutical manufacturing outlet, where the pharmaceutical manufacturing inlet is connected to the first filtering outlet, and the pharmaceutical manufacturing outlet is used to discharge the produced solution;

[0009] A storage device having a storage cavity for storing the solution. The storage cavity is provided with a storage inlet connected to the pharmaceutical manufacturing outlet, and the height of the storage inlet is lower than that of the pharmaceutical manufacturing outlet. The storage cavity is also provided with a storage outlet, and the height of the storage outlet is lower than the liquid level height in the storage cavity;

[0010] A medicine outlet pipe, one end of the medicine outlet pipe is communicated with the storage outlet, the other end of the medicine outlet pipe is provided with a pipe outlet for communicating with an external loop, and the height of the pipe outlet is lower than the liquid level height in the storage cavity.

[0011] Optionally, the storage inlet is arranged at the top of the storage cavity, and / or the storage outlet is arranged at the bottom of the storage cavity.

[0012] Optionally, an exhaust port is further arranged at the top of the storage device, and the exhaust port is communicated with the external environment.

[0013] Optionally, the filtering device includes a first filtering device and a second filtering device. The first filtering device and the second filtering device are communicated through a first pipeline. The filtering inlet is arranged on the first filtering device. The first pipeline and the second filtering device are both provided with the first filtering outlet, and the filtering accuracy of the first filtering device is lower than that of the second filtering device.

[0014] Optionally, a pressure pump is arranged on the first pipeline.

[0015] Optionally, the pharmaceutical equipment includes a plate electrolysis component. Two ends of the plate electrolysis component are respectively communicated with the pharmaceutical inlet and the pharmaceutical outlet, and the plate electrolysis component is used for electrolyzing seawater to produce the liquid medicine.

[0016] Optionally, the plate electrolysis component includes a plurality of plate electrolytic cells which are connected in sequence, and the outlet of the plate electrolytic cell at the end is communicated with the pharmaceutical outlet.

[0017] Optionally, the filtering device is further provided with a second filtering outlet for communicating with the external loop.

[0018] In a second aspect, a nuclear power unit is provided, which includes a unit loop and the above-mentioned seawater treatment system, and the unit loop is communicated with the pipe outlet of the seawater treatment system.

[0019] Optionally, the nuclear power unit has a plurality of the seawater treatment systems, and the medicine outlet pipes of two adjacent seawater treatment systems are communicated through a connecting pipe.

[0020] The beneficial effects of the seawater treatment system provided by this application are as follows: By setting the height of the storage inlet lower than that of the pharmaceutical outlet, the height difference between the storage inlet and the pharmaceutical outlet can cause the gravity of the liquid medicine to be converted into power. The liquid medicine prepared by the pharmaceutical device can flow into the storage cavity of the storage device by gravity, and there is no need to use an injection pump to provide power, so there is no need to repair and replace the injection pump. This not only saves the cost of equipment, but also reduces the overall maintenance workload of the seawater treatment system and reduces labor costs. Correspondingly, by setting the height of the pipe outlet lower than the liquid level in the storage cavity, the liquid medicine in the storage cavity can also flow into the external circuit by gravity, and there is no need to use an injection pump. Since the height of the storage inlet is lower than that of the pharmaceutical outlet and the height of the pipe outlet is lower than the liquid level in the storage cavity, the heights of the pharmaceutical outlet, the storage inlet, and the pipe outlet decrease in sequence. The liquid medicine flowing out of the pharmaceutical outlet can flow into the external circuit only by gravity, and there is no need to additionally set an injection pump in the system to provide power for the flow of the liquid medicine. Therefore, there is no situation where the external circuit cannot be supplied with liquid medicine due to the repair of the injection pump. Therefore, using gravity to make the liquid medicine flow into the external circuit automatically can ensure the stability of the liquid medicine supply to the external circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of this application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 Schematic diagrams of the seawater treatment system and the unit circuit provided by the embodiments of this application;

[0023] Figure 2 Schematic diagrams of the filtration equipment and the pharmaceutical equipment provided by the embodiments of this application;

[0024] Figure 3 Schematic diagrams of the storage equipment and the medicine outlet pipe provided by the embodiments of this application;

[0025] Figure 4 Schematic diagram of the plate electrolysis assembly provided by the embodiments of this application;

[0026] Figure 5 Partial schematic diagram of the nuclear power unit provided by the embodiments of this application.

[0027] Among them, the reference numerals in the drawings are as follows:

[0028] 1. Seawater treatment system; 1A. First system; 1B. Second system;

[0029] 111. First filtering device; 112. Second filtering device; 113. First pipeline; 114. Pressurized pump; 115. Check valve; 116. Filtering inlet; 117. First filtering outlet; 118. Second filtering outlet;

[0030] 12. Pharmaceutical equipment; 121. Plate electrolytic cell; 122. Pharmaceutical inlet; 123. Pharmaceutical outlet;

[0031] 13. Storage equipment; 131. Storage inlet; 132. Storage outlet; 133. Exhaust port;

[0032] 14. Valve;

[0033] 15. Medicine outlet pipe; 151. Pipe outlet;

[0034] 2. Second pipeline;

[0035] 3. Unit loop. Detailed implementation manners

[0036] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer and more understandable, the following further details the present application with reference to the accompanying Figures 1 to 5 drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0037] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0038] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present application.

[0039] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality of" means two or more, unless otherwise specifically defined.

[0040] To prevent the growth of marine organisms in various equipment of nuclear power units, chlorination treatment of circulating water is an effective measure. A seawater treatment system is usually installed in a nuclear power unit. This system chemically treats seawater to obtain sodium hypochlorite solution with a concentration of 1 gram per liter, and injects the produced solution into each loop of the nuclear power unit (circulating water filtration system, circulating water system, nuclear island emergency water system). Sodium hypochlorite can inhibit the reproduction of marine organisms or kill their larvae and spores, so as to protect the system equipment in contact with seawater from chloride and marine organism pollution.

[0041] Currently, the seawater treatment system uses injection pumps to add the produced sodium hypochlorite solution into each loop of the nuclear power unit. Since sodium hypochlorite has strong corrosiveness, the injection pumps are prone to damage. Therefore, the injection pumps need to be frequently overhauled or replaced, which greatly increases the workload of personnel. Moreover, during the inspection and replacement period, the valves of the pipelines where the injection pumps are located need to be closed, and the sodium hypochlorite solution cannot be introduced into the loops for disinfection. During this period, the activity of marine organisms in seawater cannot be inhibited, which is not conducive to the protection of the system equipment in the loops.

[0042] Based on this, the present application provides a seawater treatment system to solve the above problems.

[0043] Please refer to Figure 1 、 Figure 2 and Figure 5 , and the seawater treatment system 1 provided by the embodiment of the present application will now be described. In the embodiment of the present application, the seawater treatment system 1 includes a filtering device, a pharmaceutical manufacturing device 12, a storage device 13, and a medicine outlet pipe 15. The filtering device has a filtering inlet 116 and a first filtering outlet 117. The filtering inlet 116 is used to introduce seawater. The pharmaceutical manufacturing device 12 has a pharmaceutical manufacturing inlet 122 and a pharmaceutical manufacturing outlet 123. The pharmaceutical manufacturing inlet 122 is connected to the first filtering outlet 117. The pharmaceutical manufacturing outlet 123 is used to discharge the produced solution. The storage device 13 has a storage cavity for storing the solution. The storage cavity is provided with a storage inlet 131, and the storage inlet 131 is connected to the pharmaceutical manufacturing outlet 123, and the height of the storage inlet 131 is lower than that of the pharmaceutical manufacturing outlet 123. The storage cavity is also provided with a storage outlet 132, and the height of the storage outlet 132 is lower than the liquid level height in the storage cavity. One end of the medicine outlet pipe 15 is connected to the storage outlet 132, and the other end of the medicine outlet pipe 15 is provided with a pipe outlet 151 for connecting to an external loop, and the height of the pipe outlet 151 is lower than the liquid level height in the storage cavity.

[0044] The seawater treatment system of the present application sets the height of the storage inlet 131 lower than the height of the pharmaceutical outlet 123. The height difference between the storage inlet 131 and the pharmaceutical outlet 123 can convert the gravity of the liquid medicine itself into power. That is to say, the liquid medicine prepared by the pharmaceutical device can flow into the storage cavity of the storage device 13 by gravity, and there is no need to use an injection pump to provide power, so there is no need to repair and replace the injection pump. This not only saves the cost of the equipment, but also reduces the overall maintenance workload of the seawater treatment system 1 and the labor cost. Correspondingly, the height of the pipe outlet 151 is set lower than the liquid level height in the storage cavity, and the liquid medicine in the storage cavity can also flow into the external circuit by gravity, and there is no need to use an injection pump. Since the height of the storage inlet 131 is lower than the height of the pharmaceutical outlet 123 and the height of the pipe outlet 151 is lower than the liquid level height in the storage cavity, that is, the heights of the pharmaceutical outlet 123, the storage inlet 131, and the pipe outlet 151 decrease in turn. The liquid medicine flowing out of the pharmaceutical outlet 123 can flow into the external circuit only by gravity, and there is no need to additionally set an injection pump in the system to provide power for the flow of the liquid medicine. Then, there is no situation where the external circuit cannot be supplied with liquid medicine due to the repair of the injection pump. Therefore, using gravity to make the liquid medicine flow into the external circuit can ensure the stability of the liquid medicine supply to the external circuit.

[0045] In this embodiment, the liquid medicine is a solution containing hypochlorous acid and hypochlorite ions, such as sodium hypochlorite solution, etc.

[0046] Refer to Figure 3 , in some embodiments, the storage inlet 131 is arranged at the top of the storage cavity; by arranging the storage inlet 131 at the top of the storage cavity, there will be no height difference between the storage inlet 131 and the top of the storage cavity. Then, all the space inside the storage cavity can be used for storing the liquid medicine, improving the utilization rate of the internal space of the storage cavity. Of course, the storage outlet 132 can also be arranged at the bottom of the storage cavity. In this embodiment, the liquid medicine in the storage cavity flows out of the storage cavity by gravity. By arranging the storage outlet 132 at the lowest part of the storage cavity, there will be no height difference between the storage outlet 132 and the bottom of the storage cavity. Then, the liquid medicine at various heights in the storage cavity can flow out and be discharged from the storage cavity, reducing the flow dead zone in the storage cavity. When the pharmaceutical equipment 12 does not produce liquid medicine, the liquid medicine in the storage cavity can also be emptied, which is convenient for cleaning the storage cavity.

[0047] In this embodiment, the storage device 13 is a medicine storage tank, and the internal space of the tank body of the medicine storage tank forms a storage cavity. The storage inlet 131 and the storage outlet 132 are both arranged on the medicine storage tank.

[0048] In a specific embodiment, the volume of the medicine storage tank is approximately 33.7 cubic meters, and the installation height of the medicine storage tank is approximately 6 meters, that is, the height difference between the bottom of the medicine storage tank and the installation surface is 6 meters, and the height difference between the liquid level of the liquid medicine in the storage cavity of the medicine storage tank and the storage outlet 132 is 4 meters - 5 meters.

[0049] In some embodiments, the pharmaceutical equipment 12 includes a plate - type electrolysis component. The two ends of the plate - type electrolysis component are respectively connected to the pharmaceutical inlet 122 and the pharmaceutical outlet 123, and the plate - type electrolysis component is used for electrolyzing seawater to produce liquid medicine.

[0050] In this embodiment, the method of producing sodium hypochlorite solution by electrolyzing seawater is adopted. Specifically, a plate - type electrolysis component is used to electrolyze seawater. The plate - type electrolysis component has a simple structure, and the flow rate of seawater in the plate - type electrolysis component is fast, with few polarization phenomena. The seawater pressure in the plate - type electrolysis component is low, and there will be no phenomenon of tube explosion in the tube - type electrolysis unit, and the operation reliability is high; moreover, the maintenance and loading / unloading of the plate - type electrolysis component are simple and convenient for maintenance; in this embodiment, the effective chlorine with a maximum concentration of 1500 ppm can be produced by electrolyzing seawater.

[0051] Refer to Figure 4 , the plate - type electrolysis component includes a plurality of plate - type electrolytic cells 121. The plurality of plate - type electrolytic cells 121 are connected in sequence. The outlet of the plate - type electrolytic cell 121 at the end is connected to the pharmaceutical outlet 123. It should be noted that the sequential connection here means that the heads and tails of two adjacent plate - type electrolytic cells 121 are connected. For example, the outlet of the plate - type electrolytic cell 121 located upstream is connected to the inlet of the plate - type electrolytic cell 121 located downstream, and the fluid (seawater or a mixture of seawater and liquid medicine) discharged from the plate - type electrolytic cell 121 located upstream will flow into the plate - type electrolytic cell 121 located downstream for further electrolysis.

[0052] The plate - type electrolytic cell 121 has a simple structure, and the flow rate of the fluid (seawater) in the plate - type electrolytic cell 121 is fast, with few polarization phenomena. The seawater pressure in the plate - type electrolytic cell 121 is low, and there will be no phenomenon of tube explosion in the tube - type electrolytic cell, and the operation reliability is high; a plurality of plate - type electrolytic cells 121 are arranged in the plate - type electrolysis component, and the plurality of plate - type electrolytic cells 121 are connected in sequence (equivalent to connecting a plurality of plate - type electrolytic cells 121 in series), and the fluid (seawater) can pass through each plate - type electrolytic cell 121 of the plate - type electrolysis component in sequence. In this way, the plate - type electrolysis component can fully electrolyze the fluid (seawater) and improve the output rate of sodium hypochlorite. In this embodiment, each plate - type electrolysis component is provided with seven plate - type electrolytic cells 121, and the seven electrolytic cells in this plate - type electrolysis component are all connected in sequence.

[0053] Refer to Figure 1, in a specific embodiment, at least two plate - type electrolysis components are provided in the seawater treatment system 1. By providing at least two plate - type electrolysis components, the at least two plate - type electrolysis components can be used simultaneously to increase the production speed of sodium hypochlorite, or they can be used alternately as backups. The pharmaceutical inlet 122 and the pharmaceutical outlet 123 of the plate - type electrolysis component are also connected with connecting pipes, and the connecting pipes are connected to the filtering equipment or the storage equipment 13. A valve 14 can be provided on the connecting pipe to control the flow direction of the fluid, so as to cooperate with the start - up and shutdown of the plate - type electrolysis component. In this embodiment, two plate - type electrolysis components are provided in the seawater treatment system 1.

[0054] In some embodiments, an exhaust port 133 is provided at the top of the storage equipment 13, and the exhaust port 133 is communicated with the external environment.

[0055] In this embodiment, a certain amount of hydrogen is generated during the electrolysis of seawater. An exhaust port 133 needs to be provided on the storage equipment 13 so that hydrogen can escape from the seawater treatment system. However, hydrogen is a flammable and explosive gas, and the sodium hypochlorite solution is toxic and has a certain volatility. Hydrogen and the volatilized sodium hypochlorite entering the environment can easily cause the content of hydrogen and sodium hypochlorite in the environmental air to be too high, affecting the personal safety and health of the operating personnel. Connecting the exhaust port 133 of the storage equipment 13 to the external environment, hydrogen and the volatilized sodium hypochlorite can be discharged into the external environment, reducing the content of hydrogen and sodium hypochlorite in the air within the system space and ensuring the safety of the operating personnel. In this embodiment, an empty area is provided at the top of the medicine storage tank, and the empty area is communicated with the external environment. The vertical dimension of the empty area is 1 meter - 2 meters.

[0056] Continue to refer to Figure 1 and Figure 2, the filtration device includes a first filtration device 111 and a second filtration device 112. The first filtration device 111 and the second filtration device 112 are connected through a first pipeline 113. A filtration inlet 116 is provided on the first filtration device 111. Both the first pipeline 113 and the second filtration device are provided with a first filtration outlet 117. The first filtration outlets 117 on the first pipeline 113 and the second filtration device can both be connected to the pharmaceutical equipment 12. The filtration accuracy of the first filtration device 111 is lower than that of the second filtration device 112. By setting the first filtration device 111 with a lower filtration accuracy and the second filtration device 112 with a higher filtration accuracy, the first filtration device 111 can filter the garbage in the sea and larger plankton, preventing them from entering the system and affecting the operation of the equipment. Setting the first filtration device to have a lower filtration accuracy than the second filtration device allows for the selective use of the second filtration device. For example, when there are fewer impurities in the seawater, the first filtration device can be turned on alone, and the seawater directly enters the pharmaceutical equipment 12 for electrolysis after being filtered once. When there are more impurities in the seawater, both the first filtration device and the second filtration device can be turned on. The second filtration device performs secondary filtration on the filtered seawater, reducing the probability of plankton and other impurities entering the pharmaceutical equipment 12 and minimizing the impact on subsequent electrolysis operations. This reduces side reactions in the electrolysis process and the generation of by-products, contributing to an increase in the production of sodium hypochlorite.

[0057] The filtration device is also provided with a second filtration outlet 118, which is used to communicate with an external circuit. By setting the second filtration outlet 118 of the filtration device and the first filtration outlet 117 to communicate with the external circuit and the pharmaceutical equipment 12 respectively, the external circuit and the pharmaceutical equipment 12 of this embodiment can share the filtration device, which can reduce the number of devices and help reduce costs. Since the filtration device is respectively connected to the external circuit and the pharmaceutical equipment 12, the external circuit and the pharmaceutical equipment 12 will not affect each other, which is beneficial to maintaining the stability of the system's own operation.

[0058] In this embodiment, the second filtration outlet 118 is provided on the first pipeline. The external circuit can disinfect the plankton in the circuit by adding the sodium hypochlorite generated by electrolysis. Therefore, setting the second filtration outlet 118 on the first pipeline 113, that is, the seawater entering the external circuit does not need to be secondary filtered by the second filtration device 112, can also ensure the normal operation of the external system.

[0059] In this embodiment, the first filtration device 111 is a rotary screen, and the second filtration device 112 is a filter.

[0060] In some embodiments, at least two first filtration devices 111 are provided, and all the first filtration devices 111 are respectively connected to the second filtration device 112.

[0061] In this embodiment, the first filtering device 111 performs the first-stage filtering operation. The first filtering device 111 is used to filter the garbage and larger plankton in the sea. Therefore, the risk of blockage of the first filtering device 111 is relatively high. By increasing the number of the first filtering devices 111, the first filtering devices 111 can be used as backups for each other. For example, during the filtering operation of some of the first filtering devices 111, the other part of the first filtering devices 111 can be cleaned, and vice versa. This allows seawater to continuously enter the seawater treatment system 1, and further enables the seawater treatment system 1 to continuously produce sodium hypochlorite solution. In this embodiment, two first filtering devices 111 are provided.

[0062] A valve 14 can be provided on the first pipeline 113 to cooperate with the start and stop of the corresponding first filtering device 111, which facilitates the cleaning of the first filtering device 111.

[0063] In some embodiments, continue to refer to Figure 1 , a pressure pump 114 is provided on the first pipeline 113. By providing the pressure pump 114, seawater can flow in the first pipeline 113 using the power provided by the pressure pump 114, which increases the flow rate of seawater in the first pipeline 113.

[0064] In this embodiment, the pressure pump 114 can be a horizontal pump, which has a large flow rate and is convenient for disassembly and maintenance.

[0065] In some embodiments, a check valve 115 is further provided on the first pipeline 113. The check valve 115 is arranged between the pressure pump 114 and the second filtering device 112. The check valve 115 can limit the flow direction of seawater in the first pipeline 113. When the seawater in the first pipeline 113 flows towards the second filtering device 112, the check valve 115 opens, and the seawater can smoothly pass through the check valve 115. When the seawater flows in the reverse direction, the check valve 115 closes, and the seawater cannot flow towards the pressure pump 114. This can prevent the reverse flow of seawater from impacting the pressure pump 114, protect the pressure pump 114, and is beneficial to extending the service life of the pressure pump 114.

[0066] Refer to Figure 1 and Figure 5, this embodiment also provides a nuclear power unit, which includes a unit loop 3, a second pipeline 2, and the seawater treatment system 1 in any of the above embodiments. The unit loop 3 (i.e., the external loop mentioned in the above embodiment) is connected to the pipe outlet 151 of the seawater treatment system 1. Since the seawater treatment system relies on gravity for dosing and does not require an additional injection pump to provide power for the liquid medicine to flow in the system, there is no situation where the unit loop 3 cannot be dosed due to the maintenance of the injection pump. Therefore, the liquid medicine can be continuously supplied to the unit loop 3, so that the plankton in the seawater of the unit loop 3 can be killed or the reproduction can be continuously inhibited, reducing the impact of plankton on the operation of the equipment in the unit loop 3, thereby realizing the protection of the equipment in the unit loop 3.

[0067] Refer to Figure 5 , at least two seawater treatment systems 1 are provided in the nuclear power unit, and the medicine outlet pipes 15 of two adjacent seawater treatment systems 1 are connected through the second pipeline 2. By providing at least two seawater treatment systems 1 in the nuclear power unit, the production efficiency of sodium hypochlorite can be improved, so as to ensure that there is sufficient sodium hypochlorite supply in each unit loop 3 of the nuclear power unit.

[0068] In this embodiment, the second pipeline 2 is connected to the medicine outlet pipes 15 of the two seawater treatment systems 1, and the multiple seawater treatment systems 1 can be used as backups for each other. Taking two seawater treatment systems 1 as an example, the two seawater treatment systems 1 are respectively denoted as the first system 1A and the second system 1B. Both the first system 1A and the second system 1B are connected to different unit loops 3. When the first system 1A stops operating, the second system 1B can continue to operate, and the liquid medicine produced by the second system 1B can be introduced into the unit loop 3 connected to the first system 1A through the second pipeline 2, so as to ensure the supply of sodium hypochlorite to the unit loop 3 connected to the first system 1A. During the downtime of the first system 1A, the seawater in the unit loop 3 connected to the first system 1A still contains sufficient sodium hypochlorite to inhibit the growth and reproduction of aquatic organisms, ensuring the normal operation of the equipment in the unit loop 3, and further making the operation between the systems in the nuclear power unit more flexible.

[0069] Of course, a valve 14 can also be provided on the second pipeline 2. The valve 14 can control the opening and closing of the second pipeline 2. During the downtime of the first system 1A, the second pipeline 2 can be opened, and the liquid medicine produced by the second system 1B can be introduced into the unit loop 3 connected to the first system 1A through the second pipeline 2. During the period when both the first system 1A and the second system 1B are in use, the valve 14 can be closed to block the second pipeline 2. At this time, the first system 1A and the second system 1B can dose the liquid medicine into the unit loops 3 connected to them respectively.

[0070] In this embodiment, the unit loop 3 includes at least one of a circulating water system, a circulating water filtration system, and a nuclear island emergency water system.

[0071] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A seawater treatment system, characterized in that: include: A filtering device, the filtering device having a filtering inlet and a first filtering outlet, the filtering inlet being used to introduce seawater; A pharmaceutical device, the pharmaceutical device having a pharmaceutical inlet and a pharmaceutical outlet, the pharmaceutical inlet is connected to the first filtering outlet, and the pharmaceutical outlet is used to discharge the produced drug solution; A storage device, wherein the storage device has a storage cavity, the storage cavity is used to store the drug liquid, the storage cavity is provided with a storage inlet, the storage inlet is connected to the drug outlet, and the height of the storage inlet is lower than the height of the drug outlet, and the storage cavity is also provided with a storage outlet, the height of the storage outlet is lower than the liquid level in the storage cavity; A medicine outlet pipe, one end of which is connected to the storage outlet, and the other end of which is provided with a pipe outlet for connecting to an external circuit, wherein the height of the pipe outlet is lower than the liquid level in the storage chamber.

2. The seawater treatment system according to claim 1, characterized in that: The storage inlet is arranged at the top of the storage cavity, and / or the storage outlet is arranged at the bottom of the storage cavity.

3. The seawater treatment system according to claim 1, characterized in that: The top of the storage device is also provided with an exhaust port, which is communicated with the external environment.

4. The seawater treatment system according to claim 1, characterized in that: The filtering device includes a first filtering device and a second filtering device, the first filtering device and the second filtering device are connected through a first pipeline, the first filtering device is provided with the filtering inlet, the first pipeline and the second filtering device are both provided with the first filtering outlet, and the filtering accuracy of the first filtering device is lower than that of the second filtering device.

5. The seawater treatment system according to claim 4, characterized in that: The first pipeline is provided with a pressure pump.

6. The seawater treatment system according to claim 1, characterized in that: The pharmaceutical equipment comprises a plate electrolysis component, both ends of which are respectively connected to the pharmaceutical inlet and the pharmaceutical outlet, and the plate electrolysis component is used for electrolyzing seawater to produce the pharmaceutical solution.

7. The seawater treatment system according to claim 6, characterized in that: The plate electrolysis assembly includes a plurality of plate electrolytic cells, which are connected in sequence, and the outlets of the plate electrolytic cells at the ends are connected to the pharmaceutical outlet.

8. The seawater treatment system according to any one of claims 1 to 7, characterized in that: The filtering device is also provided with a second filtering outlet, and the second filtering outlet is used to be connected to the external circuit.

9. A nuclear power unit, comprising a unit circuit, characterized in that: It also comprises the seawater treatment system according to any one of claims 1 to 8, wherein the unit loop is connected to a pipe outlet of the seawater treatment system.

10. The nuclear power plant according to claim 9, characterized in that: The nuclear power unit has a plurality of seawater treatment systems, and the medicine outlet pipes of two adjacent seawater treatment systems are connected via a connecting pipe.

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