CN219196140U - Nuclear island demineralized water supply device of high-temperature gas cooled reactor - Google Patents
Nuclear island demineralized water supply device of high-temperature gas cooled reactor Download PDFInfo
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- CN219196140U CN219196140U CN202222254193.6U CN202222254193U CN219196140U CN 219196140 U CN219196140 U CN 219196140U CN 202222254193 U CN202222254193 U CN 202222254193U CN 219196140 U CN219196140 U CN 219196140U
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Abstract
The application discloses high temperature gas cooled reactor nuclear island demineralized water supply device includes: the water tank is far higher than the water consumption point, and the desalted water stored in the water tank flows to the water consumption point under the action of gravity so as to supply water; a condensate water tank in which desalted water is stored; the water supply main pipe is connected between the condensate water tank and the high-level water tank, and is provided with a water supply pump for pumping desalted water in the condensate water tank into the high-level water tank; the water supply branch pipe is connected between the water supply main pipe and the water consumption point, and the water supply pump is also used for pumping the salt removal water in the coagulant water tank into the water supply branch pipe so as to directly supply water to the water consumption point; and the water return pipe is connected between the outlet of the water supply pump and the condensate water tank, and is provided with a recirculation valve, so that part of desalted water is returned to meet the minimum flow requirement of the water supply pump. The water supply pump damage and the water consumption that use water yield to be less than the minimum operation flow requirement of working pump and lead to working pump to hold back pressure and cavitation's problem because of frequently starting to stop among the present nuclear island demineralized water supply mode can be solved to this application.
Description
Technical Field
The application belongs to the technical field of nuclear power, and particularly relates to a demineralized water supply device for a high-temperature gas cooled reactor nuclear island.
Background
The conventional pressurized water reactor uses desalted water as a coolant, and the high-temperature gas cooled reactor uses helium as a coolant, so that the demand of the high-temperature gas cooled reactor nuclear island for the desalted water is small. The main loads of the nuclear island demineralized water include intermittently supplementing water to the equipment cooling water system and the chilled water system, continuously adding humidification water to the air conditioning system, cleaning water during detection, and the like. At present, the demineralized water is supplied by a branch pipe on a mother pipe at the outlet of a BOP water supply pump, the branch pipe is connected to the inlet of a demineralized water distribution system of a nuclear island, and the BOP water supply pump supplies water flow and pressure head. However, this water supply has the following disadvantages:
1. the nuclear island demineralized water user intermittently uses water, so that a BOP water supply pump is frequently started and stopped to be damaged;
2. under normal conditions, the water demand of the nuclear island demineralized water user is about 2.6t/h, which is smaller than the minimum running flow demand of the BOP water supply pump, so that the water supply pump is pressurized and cavitation is caused, and the maintenance cost is increased.
Disclosure of Invention
The application aims at least solving one of the technical problems existing in the prior art and providing a demineralized water supply device for a nuclear island of a high-temperature gas cooled reactor.
The embodiment of the application provides a high temperature gas cooled reactor nuclear island demineralized water supply device, include: the high-level water tank is far higher than the water consumption point, is connected with the water supply branch pipe through the water outlet pipe, and the desalted water stored in the high-level water tank flows to the water consumption point through the water outlet pipe and the water supply branch pipe under the action of gravity so as to supply water; a condensate water tank in which desalted water is stored; the water supply main pipe is connected between the condensate water tank and the high-level water tank, and a water supply pump is arranged on the water supply main pipe and is used for pumping the desalination water in the condensate water tank into the high-level water tank; the water supply branch pipe is connected between the water supply main pipe and the water consumption point, and the water supply pump is also used for pumping the desalination water in the condensate water tank into the water supply branch pipe so as to directly supply water to the water consumption point; the water return pipe is connected between the outlet of the water supply pump and the coagulation water tank, a recirculation valve is arranged on the water return pipe, and when the water supply pump is used for supplying water, the recirculation valve controls the opening of the water return pipe, so that part of desalted water flows back to meet the minimum flow requirement of the water supply pump.
In some embodiments, an air bladder is provided within the head tank for expanding or contracting upon changes in desalinated water volume to cushion pressure changes, and may also provide water supply pressure to reduce the height of the head tank.
In some embodiments, a pressure transmitter is arranged on the high-level water tank, and the pressure transmitter is in communication connection with the water supply pump; when the pressure of the air bag reaches the upper limit value and the lower limit value, the pressure transmitter generates an electric signal to control the starting and stopping of the water supply pump.
In some embodiments, the high-level water tank is provided with a heater, and the heater is used for electrifying and heating desalted water in the high-level water tank, so that the high-level water tank can be subjected to anti-freezing protection.
In some embodiments, a temperature transmitter is further arranged on the high-level water tank, and the temperature transmitter is in communication connection with the heater; when the temperature of the desalted water in the high-level water tank reaches the upper limit value and the lower limit value, the temperature transmitter generates an electric signal to control the heater to start and stop.
In some embodiments, a flow transmitter is provided on the water manifold, the flow transmitter being in communication with the recirculation valve; when water is directly supplied by the water supply pump and the water supply flow rate of the water supply branch pipe is smaller than the minimum flow rate requirement of the water supply pump, the flow transmitter generates an electric signal to control the opening degree of the recirculation valve.
In some embodiments, further comprising a first valve, a second valve, and a third valve; the first valve is arranged at the positions of the water supply branch pipe and the high-level water tank of the water supply main pipe; the second valve is arranged on the water outlet pipe; the third valve is arranged at the position of the water supply branch pipe, which is positioned at the water outlet pipe and the water supply main pipe.
In some embodiments, a drain pipe is connected between the high-level water tank and the condensate water tank, and is used for discharging the desalted water in the high-level water tank into the condensate water tank, and when the high-level water tank is subjected to maintenance, cleaning and other operations, the desalted water in the high-level water tank can be discharged into the condensate water tank through the drain pipe.
In some embodiments, a fourth valve is arranged on the drain pipe and used for controlling the on-off of the drain pipe.
In some embodiments, the number of the water supply pumps is two, and the two water supply pumps are arranged in parallel, so that the two water supply pumps can be switched between to avoid the influence on use caused by the failure of one of the two water supply pumps, and the two water supply pumps can be started at the same time to meet the requirement of higher water supply pressure.
The technical scheme of the application has the following beneficial technical effects:
the utility model provides a high temperature air-cooled reactor nuclear island demineralized water supply device, it can replace the working shaft through the high-order water tank that is far above with the water point to carry out the low-flow water supply to solve the problem that the working shaft damaged because of frequently starting and stopping in the current nuclear island demineralized water supply mode, simultaneously, the export of its working shaft passes through the wet return and the recirculation valve connects the moisturizing case, when using the working shaft supplies water, can pass through the aperture of recirculation valve control wet return, makes partial demineralized water backward flow in order to satisfy the minimum flow requirement of working shaft, thereby avoids the working shaft to appear holding down and cavitation's condition.
Drawings
FIG. 1 is a schematic diagram of a high temperature gas cooled reactor nuclear island demineralized water supply apparatus in an exemplary embodiment of the present application;
in the figure, 1, a high-level water tank; 2. a water outlet pipe; 3. a water supply branch pipe; 4. a water tank for coagulation and compensation; 5. a water supply main pipe; 6. a water supply pump; 7. a water return pipe; 8. a recirculation valve; 9. an air bag; 10. a pressure transmitter; 11. a heater; 12. a temperature transmitter; 13. a flow transmitter; 14. a first valve; 15. a second valve; 16. a third valve; 17. a drain pipe; 18. and a fourth valve.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail below with reference to the accompanying drawings. It should be understood that the description is only exemplary and is not intended to limit the scope of the present application. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the concepts of the present application.
In addition, the technical features described below in the different embodiments of the present application may be combined with each other as long as they do not collide with each other.
As shown in fig. 1, an embodiment of the present application provides a demineralized water supply apparatus for a nuclear island of a high-temperature gas cooled reactor, including: the high-level water tank 1 is far above a water consumption point, is connected with the water supply branch pipe 3 through the water outlet pipe 2, and desalted water stored in the high-level water tank flows to the water consumption point through the water outlet pipe 2 and the water supply branch pipe 3 under the action of gravity so as to supply water; a condensate tank 4 in which demineralized water is stored; the water supply main pipe 5 is connected between the condensate water tank 4 and the high-level water tank 1, and a water supply pump 6 is arranged on the water supply main pipe 5 and is used for pumping the desalted water in the condensate water tank 4 into the high-level water tank 1; a water supply branch pipe 3 connected between the water supply main pipe 5 and the water use point, the water supply pump 6 further for pumping the desalination water in the coagulation water tank 4 into the water supply branch pipe 3 to directly supply water to the water use point; and a water return pipe 7 connected between the outlet of the water supply pump 6 and the condensate tank 4, wherein a recirculation valve 8 is arranged on the water return pipe 7, and when the water supply pump 6 is used for supplying water, the recirculation valve 8 controls the opening of the water return pipe 7 to enable part of desalted water to flow back so as to meet the minimum flow requirement of the water supply pump 6.
According to the high-temperature air-cooled reactor nuclear island demineralized water supply device, the high-level water tank 1 far higher than a water point can be used for replacing the water supply pump 6 to supply water in a small flow manner, so that the problem that the water supply pump 6 is damaged due to frequent start and stop in an existing nuclear island demineralized water supply mode is solved, meanwhile, the outlet of the water supply pump 6 is connected with the condensate water tank 4 through the water return pipe 7 and the recirculation valve 8, when the water supply pump 6 is used for supplying water, the opening of the water return pipe 7 can be controlled through the recirculation valve 8, so that partial demineralized water can flow back to meet the minimum flow requirement of the water supply pump 6, and the conditions of pressure holding and cavitation of the water supply pump 6 are avoided.
On the basis of the foregoing embodiment, the air bag 9 is optionally provided in the head tank 1 to expand or contract when the demineralized water capacity is changed to buffer the pressure change, and the air bag 9 may also provide the water supply pressure when supplying water, thereby reducing the installation height of the head tank 1. Further, the head tank 1 is provided with an air inlet and an air outlet communicated with the air bag 9 for air intake or exhaust.
On the basis of the previous embodiment, optionally, a pressure transmitter 10 is arranged on the head tank 1, and the pressure transmitter 10 is in communication connection with the water supply pump 6; when the pressure of the air bag 9 reaches the upper limit value and the lower limit value, the pressure transmitter 10 generates an electric signal to control the start and stop of the water supply pump 6. For example, when the upper and lower limit values of the pressure of the air bladder 9 are 0.4Mpa and 0.8Mpa, respectively, and the desalinated water in the head tank 1 is reduced, the air bladder 9 is inflated and the pressure is reduced, and when the pressure of the air bladder 9 reaches 0.4Mpa, the pressure transmitter 10 generates an electric signal to control the water supply pump 6 to operate and supply water to the head tank 1, and correspondingly, when the desalinated water in the head tank 1 is increased, the air bladder 9 is contracted and the pressure is increased, and when the pressure of the air bladder 9 reaches 0.8Mpa, the pressure transmitter 10 generates an electric signal to control the water supply pump 6 to stop operating and supply water is ended.
On the basis of the foregoing embodiment, optionally, the high-level water tank 1 is provided with a heater 11, which is used for electrically heating the desalted water in the high-level water tank 1, so that the high-level water tank 1 can be protected from freezing. In this embodiment, the number of the heaters 11 is limited, and may be 1, 2, 3, 4, or more, and when a plurality of heaters 11 are simultaneously disposed, the plurality of heaters 11 may be simultaneously used to increase heating efficiency, or may be used alone, and when one of the heaters 11 fails, the other heaters 11 are used to perform heating.
On the basis of the previous embodiment, optionally, a temperature transmitter 12 is further arranged on the high-level water tank, and the temperature transmitter 12 is in communication connection with the heater 11; when the temperature of the desalted water in the high-level water tank 1 reaches the upper limit value and the lower limit value, the temperature transmitter 12 generates an electric signal to control the heater 11 to start and stop. For example, when the temperature of the demineralized water in the head tank 1 reaches the upper and lower limit values of 10 ℃ and 20 ℃ respectively, the temperature transmitter 12 generates an electric signal to control the heater 11 to operate when the temperature of the demineralized water in the head tank 1 is reduced to 10 ℃ and heats the hot demineralized water in the head tank 1, and correspondingly, when the temperature of the demineralized water in the head tank 1 is increased to 20 ℃, generates an electric signal to control the heater 11 to stop operating and the heating is ended.
On the basis of the previous embodiment, optionally, a flow transmitter 13 is arranged on the water supply branch pipe 3, and the flow transmitter 13 is in communication connection with the recirculation valve 8; when water is directly supplied from the water supply pump 6 and the water supply flow rate of the water supply branch pipe 3 is less than the minimum flow rate requirement of the water supply pump 6, the flow rate transmitter 13 generates an electric signal to control the opening degree of the recirculation valve 8. Specifically, as shown in fig. 1, the flow transmitter 13 is provided at a position near the water point of the water supply branch pipe 3.
Optionally, on the basis of the foregoing embodiment, a first valve 14, a second valve 15 and a third valve 16 are further included; the first valve 14 is arranged at the position of the water supply main pipe 5, which is positioned at the water supply branch pipe 3 and the high-level water tank 1; the second valve 15 is arranged on the water outlet pipe 2; the third valve 16 is arranged at the position of the water supply branch pipe 3, which is positioned at the water outlet pipe 2 and the water supply main pipe 5. In a specific application, the different operations are performed by controlling the opening and closing of the valve. For example, when the low-flow water supply is performed, the first valve 14 and the second valve 15 are opened, the third valve 16 is closed, and the low-flow water supply is performed to the user from the head tank 1; when large-flow water supply is performed, the first valve 14 and the second valve 15 can be closed, the third valve 16 can be opened, water is directly supplied to a user by the water supply pump 6, the first valve 14, the second valve 15 and the third valve 16 can be opened, water is simultaneously supplied to the user by the high-level water tank 1 and the water supply pump 6, and the water supply pump 6 can supplement water for the high-level water tank 1, so that the rapid pressure drop of the high-level water tank 1 is avoided.
On the basis of the foregoing embodiment, optionally, a drain pipe 17 is connected between the head tank 1 and the condensate tank 4, for discharging the desalted water in the head tank 1 into the condensate tank 4. Correspondingly, the fourth valve 18 is arranged on the drain pipe 17, and in normal use, the fourth valve 18 is closed, and when the desalted water in the high-level water tank 1 needs to be discharged, for example, when the high-level water tank needs to be overhauled or cleaned, the fourth valve 18 is opened, and the desalted water in the high-level water tank 1 is discharged into the coagulant tank 4 through the drain pipe 17.
On the basis of the foregoing embodiment, the number of the water supply pumps 6 is optionally two, and two water supply pumps 6 are arranged in parallel. Specifically, the two water supply pumps 6 are provided one by one, and when one fails, the other can be powered, thereby contributing to the improvement of reliability. In addition, when one water supply pump 6 fails to meet the water supply demand, two water supply pumps 6 may be simultaneously started.
The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those of ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are also within the protection of the present application.
Claims (10)
1. The utility model provides a high temperature gas cooled reactor nuclear island demineralized water supply device which characterized in that includes:
the high-level water tank is far higher than the water consumption point, is connected with the water supply branch pipe through the water outlet pipe, and the desalted water stored in the high-level water tank flows to the water consumption point through the water outlet pipe and the water supply branch pipe under the action of gravity so as to supply water;
a condensate water tank in which desalted water is stored;
the water supply main pipe is connected between the condensate water tank and the high-level water tank, and a water supply pump is arranged on the water supply main pipe and is used for pumping the desalination water in the condensate water tank into the high-level water tank;
the water supply branch pipe is connected between the water supply main pipe and the water consumption point, and the water supply pump is also used for pumping the desalination water in the condensate water tank into the water supply branch pipe so as to directly supply water to the water consumption point;
the water return pipe is connected between the outlet of the water supply pump and the coagulation water tank, a recirculation valve is arranged on the water return pipe, and when the water supply pump is used for supplying water, the recirculation valve controls the opening of the water return pipe, so that part of desalted water flows back to meet the minimum flow requirement of the water supply pump.
2. The nuclear island demineralized water supply apparatus of a high-temperature gas cooled reactor according to claim 1, wherein an air bag is provided in the head tank for expanding or contracting when the demineralized water capacity is changed to buffer the pressure change.
3. The high-temperature gas cooled reactor nuclear island demineralized water supply device according to claim 2, wherein a pressure transmitter is arranged on the high-level water tank, and the pressure transmitter is in communication connection with the water supply pump;
when the pressure of the air bag reaches the upper limit value and the lower limit value, the pressure transmitter generates an electric signal to control the starting and stopping of the water supply pump.
4. The high-temperature gas cooled reactor nuclear island demineralized water supply device according to claim 1, wherein a heater is arranged on the high-level water tank and is used for electrifying and heating the demineralized water in the high-level water tank.
5. The high-temperature air-cooled nuclear island demineralized water supply apparatus of claim 4, wherein a temperature transmitter is further arranged on the head tank, and the temperature transmitter is in communication connection with the heater;
when the temperature of the desalted water in the high-level water tank reaches the upper limit value and the lower limit value, the temperature transmitter generates an electric signal to control the heater to start and stop.
6. The high-temperature gas cooled reactor nuclear island demineralized water supply device according to claim 1, wherein a flow transmitter is arranged on the water supply branch pipe, and the flow transmitter is in communication connection with the recirculation valve;
when water is directly supplied by the water supply pump and the water supply flow rate of the water supply branch pipe is smaller than the minimum flow rate requirement of the water supply pump, the flow transmitter generates an electric signal to control the opening degree of the recirculation valve.
7. The high temperature gas cooled reactor nuclear island demineralized water supply apparatus of claim 1, further comprising a first valve, a second valve, and a third valve;
the first valve is arranged at the positions of the water supply branch pipe and the high-level water tank of the water supply main pipe;
the second valve is arranged on the water outlet pipe;
the third valve is arranged at the position of the water supply branch pipe, which is positioned at the water outlet pipe and the water supply main pipe.
8. The nuclear island demineralized water supply apparatus of a high-temperature gas cooled reactor according to claim 1, wherein a drain pipe is connected between the high-level water tank and the condensate tank, and is used for discharging demineralized water in the high-level water tank into the condensate tank.
9. The nuclear island demineralized water supply apparatus of claim 8, wherein a fourth valve is provided on the drain pipe.
10. The high temperature gas cooled reactor nuclear island demineralized water supply apparatus of claim 1, wherein the number of said water supply pumps is two, and two of said water supply pumps are arranged in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222254193.6U CN219196140U (en) | 2022-08-25 | 2022-08-25 | Nuclear island demineralized water supply device of high-temperature gas cooled reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222254193.6U CN219196140U (en) | 2022-08-25 | 2022-08-25 | Nuclear island demineralized water supply device of high-temperature gas cooled reactor |
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| CN219196140U true CN219196140U (en) | 2023-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222254193.6U Active CN219196140U (en) | 2022-08-25 | 2022-08-25 | Nuclear island demineralized water supply device of high-temperature gas cooled reactor |
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| CN (1) | CN219196140U (en) |
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- 2022-08-25 CN CN202222254193.6U patent/CN219196140U/en active Active
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