A water supply system

Abstract

The present invention provides a water supply system, which is applied to a reactor, and includes: a water storage device; a first water inlet pipe, which is used to communicate with the water storage device; a first water outlet pipe, which is used to communicate with the reactor; a first water pumping pipeline, wherein the two ends of the first water pumping pipeline are respectively connected to the first water inlet pipe and the first water outlet pipe, and the first water pump is arranged in the first water pumping pipeline; a second water pumping pipeline, wherein the second water pumping pipeline is connected in parallel with the first water pumping pipeline, and the second water pump is arranged in the second water pumping pipeline; wherein the maximum flow rate of the first water pump is less than the maximum flow rate of the second water pump. A water supply system provided by an embodiment of the present invention can solve the problem of inaccurate flow regulation in the prior art.

Description

Technical Field

[0001] The invention relates to the field of water supply, and in particular to a water supply system. Background Art

[0002] At present, in various industrial and mining enterprises, corresponding water supply systems are usually set up to supply water to water-demanding equipment such as reactors. The water demand of water-demanding equipment under different working conditions may be different. For example, the water demand is usually less in the start-stop stage and under low-power working conditions, while the water demand is more under high-power working conditions; in addition, the water demand of different water-demanding equipment may also be different. In order to meet the water demand of water-demanding equipment under different working conditions and the water demand of different water-demanding equipment, an electric pump with a large flow adjustment range is usually set between the water storage tank and the water-demanding equipment in the prior art to adjust the water supply flow to the water-demanding equipment. However, since the larger the adjustment range of the electric pump, the lower the accuracy of its flow regulation, therefore, in the prior art, an electric pump with a large flow adjustment range is set between the water storage tank and the water-demanding equipment, which will lead to the problem of inaccurate flow regulation of the water supply system. Summary of the invention

[0003] The embodiment of the present invention provides a water supply system to solve the problem of inaccurate flow regulation in the prior art.

[0004] In order to solve the above technical problems, an embodiment of the present invention provides a water supply system, which is applied to a reactor and includes:

[0005] Water storage devices;

[0006] A first water inlet pipe, used to communicate with the water storage device;

[0007] A first water outlet pipe, used to communicate with the reactor;

[0008] a first water pumping device, the first water pumping device comprising a first water pumping pipeline and a first water supply pump, the two ends of the first water pumping pipeline being respectively connected to the first water inlet pipe and the first water outlet pipe, and the first water supply pump being arranged in the first water pumping pipeline;

[0009] A second water pumping device, the second water pumping device comprising a second water pumping pipeline and a second water supply pump, the second water pumping pipeline is connected in parallel with the first water pumping pipeline, and a second water supply pump is arranged in the second water pumping pipeline;

[0010] Wherein, the maximum flow rate of the first water supply pump is smaller than the maximum flow rate of the second water supply pump.

[0011] Optionally, the second water pumping device further includes a third water pumping pipeline, a fourth water pumping pipeline, a third water supply pump and a fourth water supply pump, the third water pumping pipeline and the fourth water pumping pipeline are respectively connected in parallel with the second water pumping pipeline, the third water supply pump is arranged in the third water pumping pipeline, and the fourth water supply pump is arranged in the fourth water pumping pipeline;

[0012] Among them, the maximum flow rate of the third water supply pump and the maximum flow rate of the fourth water supply pump are both greater than the maximum flow rate of the first water supply pump.

[0013] Optionally, the maximum flow rate of the first water supply pump is 3%-10% of the maximum water supply flow rate of the water supply system, and the maximum flow rates of the second water supply pump, the third water supply pump and the fourth water supply pump are respectively 20%-40% of the maximum water supply flow rate of the water supply system.

[0014] Optionally, the first water supply pump, the second water supply pump and the fourth water supply pump are all electric pumps, and the third water supply pump is a pneumatic pump.

[0015] Optionally, the water supply system further comprises a flow regulating device, and the first water outlet pipe is connected to the reactor through the flow regulating device;

[0016] The flow regulating device comprises a second water inlet pipe, a first water delivery pipeline and a second water outlet pipe connected in sequence;

[0017] The first water delivery pipeline includes a first branch and a second branch, and the inner diameter of the first branch is smaller than the inner diameter of the second branch;

[0018] The first water pipeline is provided with a first flow sensor for monitoring the flow of the first water pipeline, a first regulating valve for opening and closing the first branch, and a second regulating valve for opening and closing the second branch.

[0019] Optionally, the flow regulating device further comprises a second water delivery pipeline, and the second water delivery pipeline is connected in parallel with the first water delivery pipeline;

[0020] A third regulating valve is provided in the second water delivery pipeline, the inner diameter of the second water delivery pipeline is larger than the inner diameter of the second branch, and a second flow sensor for monitoring the flow of the first water outlet pipe is provided in the second water inlet pipe.

[0021] Optionally, the water supply system includes at least two reactors, and each reactor is connected to the first water outlet pipe through a flow regulating device.

[0022] Optionally, a first isolation valve and a first check valve are provided in the second water outlet pipe.

[0023] Optionally, the first water outlet pipe is connected to the water storage device via a first return pipeline, and a first switch valve and a second check valve are provided in the first return pipeline.

[0024] Optionally, a heater is provided on the first water outlet pipe.

[0025] In an embodiment of the present invention, two water supply pumps with different flow regulation ranges are arranged in the water supply system. When the reactor is in the start-stop stage, the flow regulation is performed by the first water supply pump with a smaller flow regulation range. When the reactor is in other working states, the flow regulation is performed by the second water supply pump with a larger flow regulation range. In this way, the water demand of the reactor under different working conditions can be met, and the error of flow regulation of the water supply system in the start-stop stage can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the overall structure of the water supply system provided by an embodiment of the present invention.

[0027] Figure 2 This is a schematic diagram of the structure of a water supply system provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0028] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will be described in detail in conjunction with the accompanying drawings and specific embodiments. In the following description, specific details such as specific configurations and components are provided only to help fully understand the embodiments of the present invention. Therefore, it should be clear to those skilled in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present invention. In addition, for clarity and brevity, the description of known functions and structures is omitted.

[0029] It should be understood that the references to "one embodiment" or "an embodiment" throughout the specification mean that the specific features, structures, or characteristics associated with the embodiment are included in at least one embodiment of the present invention. Therefore, the references to "in one embodiment" or "in an embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0030] In various embodiments of the present invention, it should be understood that the size of the serial numbers of the following processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0031] See also Figure 1 , Figure 1It is a schematic diagram of the overall structure of a water supply system provided by an embodiment of the present invention. In this embodiment, the water storage device 1 may include a condensate storage tank 101 for supplying water to the first pumping device 2 and a deaerator 102 for supplying water to the second pumping device 3. The water storage device 1 is connected to the first water outlet pipe 4 through the first pumping device 2 and the second pumping device 3, respectively, to form two different water supply structures. Specifically, the condensate storage tank 101, the first pumping device 2 and the first water outlet pipe 4 form a first water supply structure, and the first water supply structure can be used to supply water for start-stop conditions. The deaerator 102, the second pumping device 3 and the first water outlet pipe 4 form a second water supply structure, and the second water supply structure can be used to supply water for other conditions except start-stop conditions. Among them, the water supplied by the first water supply structure and the second water supply structure both flows out through the first water outlet pipe 4, and the first water outlet pipe 4 serves as a water distribution mother pipe to supply water to the rear-end water-demanding equipment, such as Figure 1 As shown, the water-requiring equipment may include multiple reactors 6. In order to improve the stability of the water supply system in supplying water to each reactor, a flow regulating device 5 may be provided between the first water outlet pipe and the reactor to regulate the flow from the first water outlet pipe 4 into the reactor 6.

[0032] To further explain the water supply system provided by the embodiment of the present invention, please refer to Figure 1-2 A water supply system provided in an embodiment of the present invention is applied to a reactor 6, comprising: a water storage device 1; a first water inlet pipe 103, which is used to communicate with the water storage device 1; a first water pumping device 2, wherein the first water pumping device 2 comprises a first water outlet pipe 4 and a first water supply pump 204, which is used to communicate with the reactor 6; a first water pumping pipeline 205, wherein the two ends of the first water pumping pipeline 205 are respectively connected to the first water inlet pipe 103 and the first water outlet pipe 4, and the first water pumping pipeline 205 is provided with the first water supply pump 204; a second water pumping device 3, wherein the second water pumping device 3 comprises a second water pumping pipeline 302 and a second water supply pump 303, and the second water pumping pipeline 302 is connected in parallel with the first water pumping pipeline 205, specifically, the two ends of the second water pumping pipeline 302 are respectively connected to the first water inlet pipe 103 and the first water outlet pipe 4, and the second water pumping pipeline 302 is provided with a second water supply pump 303; wherein the maximum flow rate of the first water supply pump 204 is less than the maximum flow rate of the second water supply pump 303.

[0033] The water storage device 1 may be a deaerator 102 or a condensate storage tank 101, and the reactor 6 may be a steam generator in a nuclear power plant, and the number of the steam generator may be one or more.

[0034] The first water supply pump 204 and the second water supply pump 303 may be common water pumping devices such as electric pumps and pneumatic pumps.

[0035] The maximum flow rate of the first water supply pump 204 can be 3%-10% of the maximum water supply flow rate of the water supply system. Since the working power of the reactor 6 in the start-stop stage is below 5%, the maximum flow rate of the first water supply pump 204 can be preferably 5% of the maximum water supply flow rate of the water supply system, so that the flow rate adjustment range of the first water supply pump 204 is: 0-5%. In this way, when the reactor 6 is in the start-stop stage, only the first water supply pump 204 needs to be turned on for flow adjustment. Since the flow rate adjustment range of the first water supply pump 204 is small, the accuracy of flow rate adjustment can be effectively improved. In addition, since the flow rate of the first water supply pump 204 when it is fully turned on is only 5% of the maximum water supply flow rate of the water supply system, the flow rate in the start-stop stage can be controlled within a smaller range, avoiding the problem of large adjustment error caused by excessive flow adjustment range of the water supply pump.

[0036] The maximum water supply flow rate of the above-mentioned water supply system refers to the maximum flow rate that can be provided when all water supply pumps in the water supply system are fully opened under normal conditions, that is, the maximum flow rate that can be provided when the water supply system is at full load.

[0037] It should be noted that the working power of the water supply system can be set to correspond to the working power of the reactor 6, that is, when the reactor 6 is at a certain power, the water supply system may reach this power to meet the water demand of the reactor 6. For example, when the power of the reactor 6 is 50%, the power of the water supply system must also reach 50% to meet the water demand of the reactor 6 in this state. In addition, the power of the reactor 6 should be the power of all water-demanding equipment supplied by the water supply system. For example, when the water supply system supplies water to multiple steam generators at the same time, the power of the reactor 6 is the sum of the powers of the multiple steam generators.

[0038] In an embodiment of the present invention, two water supply pumps with different flow regulation ranges are arranged in the water supply system. Thus, when the reactor 6 is in the start-stop stage, the flow regulation is performed by the first water supply pump 204 with a smaller flow regulation range. When the reactor 6 is in other working states, the flow regulation is performed by the second water supply pump 303 with a larger flow regulation range. In this way, the water demand of the reactor 6 under different working conditions can be met, and the error of flow regulation in the start-stop stage of the water supply system can be reduced.

[0039] Optionally, the second water pumping device 3 further includes a third water pumping pipeline 305, a fourth water pumping pipeline 308, a third water supply pump 310 and a fourth water supply pump 307, the third water pumping pipeline 305 and the fourth water pumping pipeline 308 are respectively connected in parallel with the second water pumping pipeline 302, the third water pumping pipeline 305 is provided with the third water supply pump 310, and the fourth water pumping pipeline 308 is provided with the fourth water supply pump 307, specifically, the two ends of the third water pumping pipeline 305 are respectively connected with the first water inlet pipe 103 and the first water outlet pipe 4, and the two ends of the fourth water pumping pipeline 308 are respectively connected with the first water inlet pipe 103 and the first water outlet pipe 4;

[0040] The maximum flow rate of the third water supply pump 310 and the maximum flow rate of the fourth water supply pump 307 are both greater than the maximum flow rate of the first water supply pump 204 .

[0041] Since the above-mentioned reactor 6 includes common operating conditions such as low-power operating conditions, medium-power operating conditions and high-power operating conditions in addition to the start-stop operating conditions, the low-power operating conditions generally refer to the operating power of 5% to 30%, the medium-power operating conditions generally refer to the operating power of 30% to 70%, and the high-power operating conditions generally refer to the operating power of more than 70%. In order to ensure that the water supply system can achieve stable water supply for different operating conditions of the reactor 6, the second water supply pump 303, the third water supply pump 310, and the fourth water supply pump 307 can cooperate to adapt to the water demand of the reactor 6 under different operating conditions. Among them, the maximum flow rate of the second water supply pump 303, the maximum flow rate of the third water supply pump 310, and the maximum flow rate of the fourth water supply pump 307 are respectively 20%-40% of the maximum water supply flow rate of the water supply system. Preferably, the maximum flow rate of the second water supply pump 303, the maximum flow rate of the third water supply pump 310, and the maximum flow rate of the fourth water supply pump 307 are respectively 35% of the maximum water supply flow rate of the water supply system.

[0042] In this way, when the reactor 6 is in a low-power operating condition, only the second water supply pump 303 is started for flow regulation, and other water supply pumps are in a closed state. Since the maximum flow of the second water supply pump 303 is 35% of the maximum water supply flow of the water supply system, the flow regulation range of the second water supply pump 303 is 0-35%. Since the low-power operating condition usually refers to the condition where the working power is between 5% and 30%, the flow regulation range of the second water supply pump 303 can meet the water demand of the reactor 6 under the low-power operating condition. At the same time, because the flow regulation range of the second water supply pump 303 is only slightly larger than the power range of the reactor 6 in the low-power operating condition, it is beneficial to improve the regulation accuracy of the second water supply pump 303 and avoid the problem of large regulation error caused by excessive flow regulation range of the water supply pump.

[0043] When the reactor 6 is in a medium power operating condition, the second water supply pump 303 and the third water supply pump 310 can be started, wherein the third water supply pump 310 can be controlled to operate at full power, and the power of the second water supply pump 303 can be adjusted to meet the water demand of the reactor 6 under this operating condition. Since the third water supply pump 310 operates at full power, that is, the third water supply pump 310 provides a relatively stable flow of 35%, therefore, by adjusting the second water supply pump 303, the flow output by the water supply system can fluctuate between 35%-70% of the maximum output flow, that is, the adjustable range of the second water supply pump 303 is 35%-70%, which is conducive to avoiding the problem of large adjustment error caused by excessive flow adjustment range of the water supply pump.

[0044] Similarly, when the reactor 6 is in a high-power operating condition, the third water supply pump 310 and the fourth water supply pump 307 can be controlled to operate at full power, and the output flow of the water supply system can be adjusted by the second water supply pump 303. Under this condition, the flow adjustment range of the second water supply pump 303 is 70%-100% of the maximum output flow. In this way, the flow adjustment requirements under high-power conditions can be met, and at the same time, the problem of large adjustment errors caused by excessive flow adjustment range of the water supply pump can be avoided.

[0045] Optionally, the first water supply pump 204, the second water supply pump 303 and the fourth water supply pump 307 are all electric pumps, and the third water supply pump 310 is a pneumatic pump.

[0046] Specifically, since the electric pump has the characteristic of facilitating flow regulation, the pneumatic pump has the characteristic of maintaining a stable flow, and the third water supply pump 310 is a pneumatic pump and does not need to participate in the process of flow regulation, in order to ensure that the third water supply pump 310 can output a stable flow when it is in full power operation, the third water supply pump 310 can be a pneumatic pump. The second water supply pump 303 needs to participate in flow regulation in multiple stages, so the second water supply pump 303 can be set as an electric pump. In order to improve the flexibility of flow regulation of the water supply system, the fourth water supply pump 307 can also be set as an electric pump.

[0047] Optionally, see Figure 2 , the water supply system further comprises a flow regulating device 5, and the first water outlet pipe 4 is connected to the reactor 6 through the flow regulating device 5;

[0048] The flow regulating device 5 includes a second water inlet pipe 501, a first water delivery pipeline 507, and a second water outlet pipe 513 connected in sequence. Specifically, the second water inlet pipe 501 is connected to the first water outlet pipe 4, and the second water outlet pipe 513 is connected to the reactor 6;

[0049] The first water delivery pipeline 507 includes a first branch 506 and a second branch 508, and the inner diameter of the first branch 506 is smaller than the inner diameter of the second branch 508;

[0050] The first water pipeline 507 is provided with a first flow sensor 503 for monitoring the flow of the first water pipeline 507, a first regulating valve 505 for opening and closing the first branch 506, and a second regulating valve for opening and closing the second branch 508. The first flow sensor 503 may be a Venturi flow sensor.

[0051] When the reactor 6 is in the start-stop stage, the first water supply pump 204 can work in cooperation with the first branch 506. Specifically, when the reactor 6 is in the start-stop stage, the second branch 508 is closed by the second regulating valve, and the water pumped by the first water supply pump 204 flows into the reactor 6 through the first branch 506.

[0052] Although the electric pump itself has the ability to regulate flow, its flow regulation accuracy is low. Therefore, the electric pump can only achieve preliminary regulation of the flow of the water supply system. In order to further improve the flow accuracy of the water supply system supplying water to the reactor 6, the embodiment of the present invention sets a first regulating valve 505 in the first branch 506 and sets a first flow sensor 503 for monitoring the flow of the first water pipeline 507 in the first water pipeline 507. Since the second branch 508 is closed, under this working condition, the flow in the first water pipeline 507 is the flow in the first branch 506. By cooperating with the first flow sensor 503 and the first regulating valve 505, the flow of water flowing through the first branch 506 can be relatively accurately controlled, thereby improving the flow accuracy of the water supply system supplying water to the reactor 6.

[0053] In addition, when the reactor 6 is in a low-power operating condition, the water pumped by the second water supply pump 303 enters the reactor 6 through the first branch 506 and the second branch 508 of the first water delivery pipeline 507. Specifically, since the flow rate in the low-power operating state is much larger than the flow rate in the start-stop condition, the first branch 506 can be fully opened by the first regulating valve 505, and the flow rate of the second branch 508 can be controlled by the second regulating valve, so as to control the flow rate in the first water delivery pipeline 507. It should be noted that since the diameter of the first branch 506 is relatively small, even if the first branch 506 is fully opened, it cannot meet the water demand of the reactor 6 under the low-power operating condition. In addition, the second regulating valve can cooperate with the first flow sensor 503 to control the flow rate of water passing through the first water delivery pipeline 507.

[0054] Specifically, since the flow rate required by the reactor 6 during the start-up and shutdown phases is relatively small, the diameter of the first branch 506 can be set to be smaller than the diameter of the second branch 508, so that the diameter of the first branch 506 is relatively small, thereby facilitating the first regulating valve 505 to regulate the water flowing through the first branch 506 during the start-up and shutdown phases. By providing the second branch 508, water can be transported through the first branch 506 and the second branch 508 of the first water delivery pipeline 507 in cooperation under low-power operating conditions.

[0055] Optionally, the flow regulating device 5 further includes a second water delivery pipeline 509, and the second water delivery pipeline 509 is connected in parallel with the first water delivery pipeline 507. Specifically, both ends of the second delivery pipeline are respectively connected to the second water inlet pipe 501 and the second water outlet pipe 513;

[0056] A third regulating valve 510 is provided in the second water supply pipeline 509. The inner diameter of the second water supply pipeline 509 is larger than the inner diameter of the second branch 508. A second flow sensor 502 for monitoring the flow of the first water outlet pipe 4 is provided in the second water inlet pipe 501. The second flow sensor 502 can be a Venturi flow sensor.

[0057] When the reactor 6 is in a medium power operating condition or a high power operating condition, the first regulating valve 505 is controlled to fully open the first branch 506, and the second regulating valve is controlled to fully open the second branch 508. Then, the third regulating valve 510 is used to adjust the flow rate under this condition. At this time, the total flow rate in the second water inlet pipe 501 is detected by the second flow meter, and the second flow meter and the third regulating valve 510 cooperate to control the flow rate flowing through the second water inlet pipe 501.

[0058] Optionally, see Figure 2 The water supply system includes at least two reactors 6, and each reactor 6 is connected to the first water outlet pipe 4 through a flow regulating device 5.

[0059] Specifically, each of the reactors 6 is connected to the first water outlet pipe 4 through a flow regulating device 5 , so that the water supply system can supply water to multiple reactors 6 at the same time.

[0060] Optionally, a first isolation valve 512 and a first check valve are provided in the second water outlet pipe 513 .

[0061] Specifically, by providing the first isolation valve 512, it is possible to effectively prevent the reactants in the reactor 6 from leaking into the water supply system, and by providing the first check valve, it is possible to prevent the water in the reactor 6 from flowing back into the water supply system.

[0062] Optionally, the first water outlet pipe 4 is connected to the water storage device 1 via a first return pipeline 311 , and a first switch valve and a second check valve are disposed in the first return pipeline 311 .

[0063] Specifically, by providing a first switch valve for controlling the on-off of the first reflux pipeline 311, when too much water enters the first water outlet pipe 4, the first switch valve can be opened so that the water in the first water outlet pipe 4 can flow back to the water storage device 1. By providing the second check valve, it is possible to prevent the water in the water storage device 1 from directly flowing into the first water outlet pipe 4 through the reflux pipeline.

[0064] Optionally, a heater is provided on the first water outlet pipe 4 .

[0065] Specifically, see Figure 2 When the reactor 6 is a steam transmitter, a first heater 401 and a second heater 402 are provided in the first water outlet pipe 4. The first heater 401 and the second heater 402 are used to preheat the water flowing through the first water outlet pipe 4 so that the water entering the steam generator can evaporate quickly.

[0066] In this embodiment, the water storage device 1 includes a deaerator 102 and a condensate storage tank 101. The condensate storage tank 101 stores water condensed from steam generated by the steam generator. The outlet of the condensate storage tank 101 is connected to the water inlet of the first pump water pipeline 205. The outlet of the condensate storage tank 101 is provided with a sixth switch valve 202 for opening and closing the condensate storage tank 101. A second switch valve 201 is provided between the water inlet of the first pump water pipeline 205 and the deaerator 102. Since the water demand of the reactor 6 is small during the start-stop stage, the water stored in the condensate storage tank 101 can basically meet the water supply demand under the start-stop condition. Therefore, under normal circumstances, the second switch valve 201 is closed. Only when the water in the condensate storage tank 101 is insufficient to supply the water demand under the start-stop condition, the second switch valve 201 is opened, and the deaerator 102 supplies water to the first pump water pipeline 205. Since the amount of water stored in the condensate storage tank 101 is relatively small, the water pressure is relatively small. Therefore, compared with the deaerator 102, it is more suitable for supplying water for the start-stop condition with a smaller water demand.

[0067] For further information, see Figure 2A second return pipeline 206 is provided between the outlet end of the first pump water pipeline 205 and the condensate storage tank 101, and a third switch valve and a third check valve are provided on the second return pipeline 206. In this way, it is convenient for the excess water in the first pump water pipeline 205 to flow back to the condensate storage tank 101 through the second return pipeline 206. A fourth switch valve 207 is also provided at the outlet end of the first pump water pipeline 205. When the water supply system is in a non-start-stop state, the fourth switch valve 207 is closed, thereby avoiding the problem of unstable flow in the first water outlet pipe 4 due to the water in the first pump water pipeline 205 flowing into the first water outlet pipe 4 under non-start-stop conditions. A fourth check valve 208 is provided at each of the water outlet ends of the first water pumping pipeline 205, the second water pumping pipeline 302, the third water pumping pipeline 305 and the fourth water pumping pipeline 308. By providing the fourth check valve 208, backflow of water in the first water outlet pipe 4 can be avoided.

[0068] In this embodiment, a fifth switch valve 301 is provided on the first water inlet pipe 103, which is used to close the water outlet of the water storage device 1. Two first electric valves 203 are provided on the first water pump pipeline 205, and the two first electric valves 203 are respectively located at both ends of the first water supply pump 204. When the first water supply pump 204 needs to be repaired or replaced, the two first electric valves 203 are closed to isolate the first water supply pump 204 from other parts of the water supply pipeline. Similarly, two second electric valves 306 are provided on the second water pumping pipeline 302, and the two second electric valves 306 are respectively located at the two ends of the second water supply pump 303. Two pneumatic valves 304 are provided on the third water pumping pipeline 305, and the two pneumatic valves 304 are respectively located at the two ends of the third water supply pump 310. Two third electric valves 309 are provided on the fourth water pumping pipeline 308, and the two third electric valves 309 are respectively arranged at the two ends of the fourth water supply pump 307, so as to facilitate the maintenance or replacement of the second water supply pump 303, the third water supply pump 310 and the fourth water supply pump 307. Two second isolation valves 504 are provided on the first water supply pipeline 507, and the two second isolation valves 504 are respectively located at the two ends of the first water supply pipeline 507. A third isolation valve 511 is respectively provided at the two ends of the second water supply pipeline 509. The pipeline between the deaerator 102 and the first water outlet pipe 4 can be located in the turbine building of the nuclear power plant, the pipeline between the first water outlet pipe 4 and the second water outlet pipe 513 can be located in the safety building of the nuclear power plant, and the reactor 6 can be located in the reactor building of the nuclear power plant.

[0069] In addition, the present invention may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplicity and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0070] It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusions.

[0071] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A water supply system, applied to a reactor, characterized in that: include: Water storage devices; A first water inlet pipe, used to communicate with the water storage device; A first water outlet pipe, used to communicate with the reactor; a first water pumping device, the first water pumping device comprising a first water pumping pipeline and a first water supply pump, the two ends of the first water pumping pipeline being respectively connected to the first water inlet pipe and the first water outlet pipe, and the first water supply pump being arranged in the first water pumping pipeline; A second water pumping device, the second water pumping device comprising a second water pumping pipeline and a second water supply pump, the second water pumping pipeline is connected in parallel with the first water pumping pipeline, and a second water supply pump is arranged in the second water pumping pipeline; Wherein, the maximum flow rate of the first water supply pump is less than the maximum flow rate of the second water supply pump; The second water pumping device further comprises a third water pumping pipeline, a fourth water pumping pipeline, a third water supply pump and a fourth water supply pump, wherein the third water pumping pipeline and the fourth water pumping pipeline are respectively connected in parallel with the second water pumping pipeline, the third water supply pump is arranged in the third water pumping pipeline, and the fourth water supply pump is arranged in the fourth water pumping pipeline; Wherein, the maximum flow rate of the third water supply pump and the maximum flow rate of the fourth water supply pump are both greater than the maximum flow rate of the first water supply pump; The maximum flow rate of the first water supply pump is 3%-10% of the maximum water supply flow rate of the water supply system, and the maximum flow rates of the second water supply pump, the third water supply pump and the fourth water supply pump are respectively 35%-40% of the maximum water supply flow rate of the water supply system; The water supply system further comprises a flow regulating device, and the first water outlet pipe is connected to the reactor through the flow regulating device; The flow regulating device comprises a second water inlet pipe, a first water delivery pipeline and a second water outlet pipe connected in sequence; The first water delivery pipeline includes a first branch and a second branch, and the inner diameter of the first branch is smaller than the inner diameter of the second branch; The first water pipeline is provided with a first flow sensor for monitoring the flow of the first water pipeline, a first regulating valve for opening and closing the first branch, and a second regulating valve for opening and closing the second branch.

2. The water supply system according to claim 1, characterized in that: The first water supply pump, the second water supply pump and the fourth water supply pump are all electric pumps, and the third water supply pump is a pneumatic pump.

3. The water supply system according to claim 1, characterized in that: The flow regulating device further comprises a second water delivery pipeline, wherein the second water delivery pipeline is connected in parallel with the first water delivery pipeline; A third regulating valve is provided in the second water delivery pipeline, the inner diameter of the second water delivery pipeline is larger than the inner diameter of the second branch, and a second flow sensor for monitoring the flow of the first water outlet pipe is provided in the second water inlet pipe.

4. The water supply system according to claim 1, characterized in that: The water supply system includes at least two reactors, and each reactor is connected to the first water outlet pipe through a flow regulating device.

5. The water supply system according to claim 1, characterized in that: A first isolation valve and a first check valve are arranged in the second water outlet pipe.

6. The water supply system according to claim 1, characterized in that: The first water outlet pipe is connected to the water storage device via a first return pipeline, and a first switch valve and a second check valve are arranged in the first return pipeline.

7. The water supply system according to claim 1, characterized in that: The first water outlet pipe is provided with a heater.

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