CN219936687U - Nuclear power station cooling water system - Google Patents
Nuclear power station cooling water system Download PDFInfo
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- CN219936687U CN219936687U CN202321170834.8U CN202321170834U CN219936687U CN 219936687 U CN219936687 U CN 219936687U CN 202321170834 U CN202321170834 U CN 202321170834U CN 219936687 U CN219936687 U CN 219936687U
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- water
- cooling water
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- exhaust
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- 239000000498 cooling water Substances 0.000 title claims abstract description 114
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 126
- 238000001816 cooling Methods 0.000 claims abstract description 57
- 239000007921 spray Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 3
- 238000000889 atomisation Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 7
- 230000005856 abnormality Effects 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 206010033799 Paralysis Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000002498 deadly effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
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- Structure Of Emergency Protection For Nuclear Reactors (AREA)
Abstract
The utility model discloses a cooling water system of a nuclear power station, which comprises a main circulating water system, a standby air cooling system and an exhaust system, wherein the main circulating water system comprises a heat exchanger and a first circulating water pump, a cooling water outlet of the heat exchanger is connected with a cooling water inlet of equipment to be cooled through a cooling water conveying pipeline, a water outlet of the equipment to be cooled is connected with a water return port of the heat exchanger through a water return pipeline, the first circulating water pump is arranged on the water return pipeline, and the exhaust system is used for exhausting free gas and dissolved gas in the pipeline; the standby air cooling system comprises an air cooling device, a water inlet of the air cooling device is connected with a water return pipeline through a water inlet pipeline, and a cooling water outlet of the air cooling device is connected with a cooling water output pipeline through a water outlet pipeline; the utility model adds a standby air cooling system as an atmospheric heat trap, and can put into operation for standby atmospheric heat traps when the water resource heat traps cannot be used, thereby avoiding the failure of the cooling system and ensuring the cooling effect of the system.
Description
Technical Field
The utility model relates to the technical field of nuclear power station cooling, in particular to a nuclear power station cooling water system.
Background
At present, an open type water system and a circulating cooling water system are generally adopted in the coastal nuclear power station, water is directly taken from the offshore, cooling water is provided for a heat exchanger of a cooling water system of equipment and a condenser of a steam turbine, and the cooling water is directly discharged to the sea after heat exchange is completed; the water resource consumption of the cooling method is huge, the cooling method is too dependent on the water resource, when the water resource cannot supply water normally, the cooling water system is directly paralyzed, the safety and the reliability of the nuclear power plant are seriously dependent on the continuous supply of the water resource, and under the accident working condition, the cooling water is a deadly factor related to the safety of the nuclear power plant.
Disclosure of Invention
The utility model aims to provide a cooling water system of a nuclear power station, which solves the problems in the prior art, is added with a standby air cooling system, is used as an atmospheric heat trap, can be put into operation for standby when a water resource heat trap cannot be used, avoids the failure of the cooling system and ensures the cooling effect of the system.
In order to achieve the above object, the present utility model provides the following solutions:
the utility model provides a cooling water system of a nuclear power station, which comprises a main circulating water system, a standby air cooling system and an exhaust system, wherein the main circulating water system comprises a heat exchanger and a first circulating water pump, a water resource water inlet and a water resource water outlet are arranged on the heat exchanger, a cooling water outlet of the heat exchanger is also connected with a cooling water inlet of equipment to be cooled through a cooling water conveying pipeline, a water outlet of the equipment to be cooled is connected with a water return port of the heat exchanger through a water return pipeline, the first circulating water pump is arranged on the water return pipeline, the exhaust system comprises a first exhaust device and a second exhaust device which are arranged on the cooling water conveying pipeline, and the first exhaust device and the second exhaust device are used for exhausting free gas and dissolved gas in the pipeline; the standby air cooling system comprises an air cooling device, a water inlet of the air cooling device is connected with the water return pipeline through a water inlet pipeline, and a cooling water outlet of the air cooling device is connected with the cooling water output pipeline through a water outlet pipeline.
Preferably, a valve I is arranged at the cooling water outlet end of the heat exchanger, and a valve II is arranged at the backwater outlet end of the heat exchanger.
Preferably, a valve III is arranged at the cooling water inlet end of the equipment to be cooled, and a valve IV is arranged at the water outlet end of the equipment to be cooled.
Preferably, a valve five is arranged at the water inlet end of the first circulating water pump, a valve six is arranged at the water outlet end of the first circulating water pump, and a check valve is further arranged between the valve five and the first circulating water pump.
Preferably, the first exhaust device and the second exhaust device are arranged between the first valve and the third valve.
Preferably, the first exhaust device comprises an exhaust pipe and an exhaust valve; the exhaust pipe is connected to the cooling water conveying pipeline, and the exhaust valve I is connected to the top of the exhaust pipe; the pipe diameter of the exhaust pipe is far larger than that of the cooling water conveying pipeline, and the pipe diameter is used for enabling free gas in cooling water to be suddenly changed in pressure in the discharging process so as to gather towards the top of the exhaust pipe; the accumulated free gas is exhausted from the exhaust valve.
Preferably, the second exhaust device comprises an atomization nozzle, a vacuum pipe section and a second exhaust valve; the atomizing nozzle is used for atomizing cooling water entering the atomizing nozzle and sending the atomized cooling water into the vacuum pipe section; the vacuum pipe section is in a vacuum environment, and the pressure of the vacuum environment enables dissolved gas in the cooling water to be separated from the cooling water; and the exhaust valve II is arranged at the outlet of the vacuum pipe section and is used for exhausting dissolved gas in the cooling water.
Preferably, the air cooling device is a closed cooling tower, a spray pipe and a circulating water pump II are arranged in the closed cooling tower, the circulating water pump II pumps cooling water at the bottom of the tower to the spray pipe, the spray pipe evaporates through the spray water on the outer wall of the water pipe group to cool the cooling water flowing through the water pipe, and meanwhile, a fan is used for timely taking away generated water vapor so as to realize heat exchange between the cooling water and an atmospheric heat trap; the inlet end of the closed cooling tower is provided with a valve seven connected to the water inlet pipeline, and the outlet end of the closed cooling tower is provided with a valve eight connected to the water outlet pipeline.
Compared with the prior art, the utility model has the following beneficial technical effects:
1. the cooling water system of the nuclear power station provided by the utility model is additionally provided with the standby air cooling system which is used as an atmospheric heat trap, so that the standby atmospheric heat trap can be put into operation when the water resource heat trap cannot be used, the failure of the cooling system is avoided, and the cooling effect of the system is ensured.
2. According to the cooling water system of the nuclear power station, provided by the utility model, through the arrangement of the exhaust device, free gas and dissolved gas in the pipeline can be discharged in the running process of the cooling water system of the nuclear power station, so that the cooling water capacity in equipment to be cooled and the heat exchange efficiency in the heat exchange unit are prevented from being reduced, and the cooling effect of the cooling water system of the nuclear power station is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a cooling water system of a nuclear power plant in the present utility model;
FIG. 2 is a schematic diagram of an exhaust apparatus according to the present utility model;
in the figure: 1-heat exchanger, 2-circulating water pump I, 3-cooling water conveying pipeline, 4-equipment to be cooled, 5-water return pipeline, 6-exhaust device I, 61-exhaust pipe, 62-exhaust valve I, 7-exhaust device II, 71-vacuumizing mechanism, 72-water pump, 73-electric valve, 74-pressure gauge and 75-exhaust valve II; 76-atomizing nozzle, 8-water inlet pipeline, 9-water outlet pipeline, 10-valve I, 11-valve II, 12-valve III, 13-valve IV, 14-valve V, 15-valve VI, 16-valve seven, 17-valve eight, 18-air cooling device, 19-closed cooling tower, 20-spray pipe, 21-circulating water pump II, 22-water pipe group, 23-fan and 24-check valve.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The utility model aims to provide a cooling water system of a nuclear power station, which aims to solve the problems existing in the prior art.
In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description.
The cooling water system of the nuclear power plant in this embodiment, as shown in fig. 1, includes a main circulating water system, a standby air cooling system and an exhaust system, the main circulating water system includes a heat exchanger 1 and a first exhaust device 7, a water resource water inlet and a water resource water outlet are provided on the heat exchanger 1, the cooling water outlet of the heat exchanger 1 is also connected with a cooling water inlet of a device to be cooled 4 through a cooling water conveying pipeline 3, the water outlet of the device to be cooled 4 is connected with a water return port of the heat exchanger 1 through a water return pipeline 5, the first exhaust device 6 and the second exhaust device 7 are provided on the cooling water conveying pipeline 3, and the first exhaust device 6 and the second exhaust device 7 are used for exhausting free gas and dissolved gas in the pipeline; the standby air cooling system comprises an air cooling device 18, a water inlet of the air cooling device 18 is connected with a water return pipeline 5 through a water inlet pipeline 8, and a cooling water outlet of the air cooling device 18 is connected with a cooling water output pipeline through a water outlet pipeline 9.
In this embodiment, the cooling water outlet end of the heat exchanger 1 is provided with a first valve 10, the water return end of the heat exchanger 1 is provided with a second valve 11, and the arrangement of the first valve 10 and the second valve 11 controls the connection or disconnection of the heat exchanger 1 relative to the cooling water system, so as to achieve the purpose of disconnecting the cooling water system of the sea heat trap part when the sea heat trap connected with the heat exchanger 1 fails in operation.
In this embodiment, the cooling water inlet end of the device to be cooled 4 is provided with a valve three 12, the water outlet end of the device to be cooled 4 is provided with a valve four 13, and the arrangement of the valve three 12 and the valve four 13 is used for controlling the on state or the off state of the device to be cooled 4, so that the problem of abnormality of the device to be cooled 4 is conveniently solved, and the waste of cooling water is reduced.
In this embodiment, the inlet end of the first circulating water pump 2 is provided with a valve five 14, the outlet end of the first circulating water pump 2 is provided with a valve six 15, and a check valve 24 is further provided between the valve five 14 and the first circulating water pump 2. The purpose of the check valve 24 is to prevent the cooling water from flowing backwards to damage the water pump; the arrangement of the valve five 14 and the valve six 15 is to control the connection state or disconnection state of the circulating water pump one 2 and the cooling water system, so that the problem of abnormality of the circulating water pump one 2 is solved conveniently, and the waste of cooling water is reduced.
In this embodiment, the first and second exhausts 6, 7 are disposed between the first and third valves 10, 12. The exhaust device one 6 includes an exhaust pipe 61 and an exhaust valve one 62; the exhaust pipe 61 is connected to the cooling water conveying pipeline 3, and the exhaust valve I62 is connected to the top of the exhaust pipe 61; the pipe diameter of the exhaust pipe 61 is far larger than that of the cooling water conveying pipeline 3, so that free gas in the cooling water is subjected to pressure abrupt change in the discharging process to gather towards the top of the exhaust pipe 61; the accumulated free gas is exhausted from the exhaust valve one 62. The first exhaust devices 6 can be arranged in a plurality, the first exhaust devices 6 are uniformly distributed on the pipeline for conveying cooling water, the adjacent two first exhaust devices 6 are arranged at intervals, the cooling water conveying pipeline 3 is used for exhausting in a segmented mode, and the gas in the pipeline is completely exhausted after the exhaust is repeatedly discharged, so that the exhaust effect is improved.
As shown in fig. 2, the second exhaust device 7 comprises an atomizing nozzle 76, a vacuum pipe section and a second exhaust valve 75; the atomizing nozzle 76 is used for atomizing the cooling water entering the inside of the nozzle and delivering the atomized cooling water into the vacuum pipe section; the vacuum pipe section is in a vacuum environment, and the pressure of the vacuum environment enables dissolved gas in the cooling water to be separated from the cooling water; and a second exhaust valve 75 is arranged at the outlet of the vacuum pipe section and is used for exhausting dissolved gas in the cooling water. The vacuum pipe section is provided with a vacuum pumping mechanism 71, and the vacuum pumping mechanism 71 is used for arranging the vacuum pipe section in a vacuum environment. At a certain temperature, the solubility of a gas in water is proportional to the pressure. Therefore, the vacuum pipe section is arranged in a vacuum environment by reducing the pressure, so that the solubility of the gas in the vacuum pipe section in the cooling water is reduced, and the dissolved gas in the cooling water is separated from the cooling water by spraying the cooling water into the vacuum pipe section after atomizing the cooling water.
The second exhaust device 7 further comprises a pressure gauge 74 arranged on the vacuum pipe section, the pressure gauge 74 is used for detecting the pressure value in the vacuum pipe section, and the second exhaust valve 75 is in communication connection with the pressure gauge 74 through a control system. The control system is used for controlling the exhaust valve II 75 to open the exhaust when the pressure value detected by the pressure gauge 74 is larger than the preset pressure.
In this embodiment, the second exhaust device 7 is connected to the cooling water delivery pipeline 3 in parallel, and the electric valve 73 is disposed on the pipeline where the second exhaust device 7 is located, so that the electric valve 73 can be opened according to a specific working time to exhaust the gas in the pipeline of the ship cooling system. The opening and closing of the exhaust device II 7 can be controlled according to specific requirements, so that the energy is saved. A water pump 72 is arranged at the water outlet of the second exhaust device 7 to discharge the exhausted cooling water out of the second exhaust device 7 to the cooling water conveying pipeline 3 of the cooling water system.
In this embodiment, the air cooling device 18 is a closed cooling tower 19, a spray pipe 20 and a second circulating water pump 21 are arranged in the closed cooling tower 19, the second circulating water pump 21 pumps cooling water at the bottom of the tower to the spray pipe 20, the spray pipe 20 evaporates the cooling water flowing through the water pipe set 22 through the spray water to cool the cooling water flowing through the water pipe, and meanwhile, the fan 23 is used for timely taking away generated water vapor so as to realize heat exchange between the cooling water and an atmospheric heat sink; the inlet end of the closed cooling tower 19 is provided with a valve seven 16 connected to the water inlet pipeline 8, and the outlet end of the closed cooling tower 19 is provided with a valve eight 17 connected to the water outlet pipeline 9.
The connection of the first circulating water pump 2, the heat exchanger 1 and the air cooling device 18 in the utility model forms two groups of cooling water systems, wherein one group is the circulation of the first circulating water pump 2 and the heat exchanger 1, and the other group is the circulation of the first circulating water pump 2 and the air cooling device 18. The effect that when one set of circulation cannot be used, the other set of circulation work still exists is achieved through the two sets of circulation, namely, when the heat exchanger 1 connected with the water resource heat trap fails, the cooling water system still can realize the normal work of the cooling water system through the air cooling device 18. In addition, the air cooling device 18 is designed as a closed cooling tower 19, cooling water flowing in the pipe is cooled by evaporating spray water on the outer wall of the water pipe, and meanwhile, generated water vapor is timely taken away by a fan 23, so that heat exchange between the cooling water and an atmospheric heat trap is realized.
The principles and embodiments of the present utility model have been described with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present utility model; also, it is within the scope of the present utility model to be modified by those of ordinary skill in the art in light of the present teachings. In summary, the present description should not be construed as limiting the utility model.
Claims (8)
1. A nuclear power plant cooling water system, characterized in that: the system comprises a main circulating water system, a standby air cooling system and an exhaust system, wherein the main circulating water system comprises a heat exchanger and a first circulating water pump, a water resource water inlet and a water resource water outlet are arranged on the heat exchanger, a cooling water outlet of the heat exchanger is also connected with a cooling water inlet of equipment to be cooled through a cooling water conveying pipeline, a water outlet of the equipment to be cooled is connected with a water return port of the heat exchanger through a water return pipeline, the first circulating water pump is arranged on the water return pipeline, the exhaust system comprises a first exhaust device and a second exhaust device which are arranged on the cooling water conveying pipeline, and the first exhaust device and the second exhaust device are used for exhausting free gas and dissolved gas in the pipeline; the standby air cooling system comprises an air cooling device, a water inlet of the air cooling device is connected with the water return pipeline through a water inlet pipeline, and a cooling water outlet of the air cooling device is connected with the cooling water output pipeline through a water outlet pipeline.
2. The nuclear power plant cooling water system of claim 1 wherein: the cooling water outlet end of the heat exchanger is provided with a valve I, and the backwater outlet end of the heat exchanger is provided with a valve II.
3. The nuclear power plant cooling water system of claim 1 wherein: the cooling water inlet end of the equipment to be cooled is provided with a valve III, and the water outlet end of the equipment to be cooled is provided with a valve IV.
4. The nuclear power plant cooling water system of claim 1 wherein: the water inlet end of the first circulating water pump is provided with a valve five, the water outlet end of the first circulating water pump is provided with a valve six, and a check valve is further arranged between the valve five and the first circulating water pump.
5. The nuclear power plant cooling water system of claim 1 wherein: the first exhaust device and the second exhaust device are arranged between the first valve and the third valve.
6. The nuclear power plant cooling water system of claim 5 wherein: the exhaust device I comprises an exhaust pipe and an exhaust valve I; the exhaust pipe is connected to the cooling water conveying pipeline, and the exhaust valve I is connected to the top of the exhaust pipe; the pipe diameter of the exhaust pipe is far larger than that of the cooling water conveying pipeline, and the pipe diameter of the exhaust pipe is used for enabling free gas in cooling water to be suddenly changed in pressure in the discharging process so as to gather towards the top of the exhaust pipe, and the gathered free gas is discharged from the exhaust valve.
7. The nuclear power plant cooling water system of claim 5 wherein: the second exhaust device comprises an atomization nozzle, a vacuum pipe section and a second exhaust valve; the atomizing nozzle is used for atomizing cooling water entering the atomizing nozzle and sending the atomized cooling water into the vacuum pipe section; the vacuum pipe section is in a vacuum environment, and the pressure of the vacuum environment enables dissolved gas in the cooling water to be separated from the cooling water; and the exhaust valve II is arranged at the outlet of the vacuum pipe section and is used for exhausting dissolved gas in the cooling water.
8. The nuclear power plant cooling water system of claim 1 wherein: the air cooling device is a closed cooling tower, a spray pipe and a circulating water pump II are arranged in the closed cooling tower, cooling water at the bottom of the circulating water pump II is pumped to the spray pipe, the spray pipe evaporates through the spray water on the outer wall of the water pipe group to cool the cooling water flowing through the cooling pipe, and meanwhile, the generated water vapor is timely taken away by a fan, so that heat exchange between the cooling water and an atmospheric heat trap is realized; the inlet end of the closed cooling tower is provided with a valve seven connected to the water inlet pipeline, and the outlet end of the closed cooling tower is provided with a valve eight connected to the water outlet pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321170834.8U CN219936687U (en) | 2023-05-16 | 2023-05-16 | Nuclear power station cooling water system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321170834.8U CN219936687U (en) | 2023-05-16 | 2023-05-16 | Nuclear power station cooling water system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219936687U true CN219936687U (en) | 2023-10-31 |
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ID=88497932
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321170834.8U Active CN219936687U (en) | 2023-05-16 | 2023-05-16 | Nuclear power station cooling water system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219936687U (en) |
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2023
- 2023-05-16 CN CN202321170834.8U patent/CN219936687U/en active Active
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