CN212061892U - Demineralized water system of nuclear power station - Google Patents
Demineralized water system of nuclear power station Download PDFInfo
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- CN212061892U CN212061892U CN202020605178.XU CN202020605178U CN212061892U CN 212061892 U CN212061892 U CN 212061892U CN 202020605178 U CN202020605178 U CN 202020605178U CN 212061892 U CN212061892 U CN 212061892U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
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Abstract
The utility model discloses a demineralized water system of nuclear power station, including demineralized water tank (1), main demineralized water pump (5), current-limiting venturi (7), main demineralized water isolation valve (9), master pipe manometer of demineralized water (11), master pipe pressure control signal of demineralized water (16), supplementary demineralized water pump (18), supplementary demineralized water isolation valve (21), main demineralized water flow control signal (22) and demineralized water user (13). The configuration adopts a relatively simplified system configuration, so that the desalted water can be supplied and switched uninterruptedly, and unnecessary energy loss and defects in operation are reduced.
Description
Technical Field
The utility model belongs to the demineralized water system field of power plant, in particular to demineralized water system field of nuclear power plant.
Background
The storage and distribution part of the nuclear power station demineralized water system mainly comprises a demineralized water tank, a delivery pump, and related pipelines, valves, instruments and the like. The demineralized water tank receives and stores demineralized water from the water treatment system, and supplies the demineralized water to each user of a containment factory building, an auxiliary factory building, a steam turbine factory building and the like in the nuclear power station through the delivery pump and the water supply pipe network. The demineralized water is mainly used for the requirements of water supply, water supplement, resin flushing and discharging and the like of users, and the water quantity, the water using mode and the time of each user are different.
If a desalting water pump is arranged for each user, the system becomes complicated, if only one desalting water pump is arranged, when the user demand is low, the desalting water pump is continuously in a small-flow operation condition, which is not only uneconomical, but also the temperature of the desalting water tank is continuously increased by circulating water, and a cooling loop is required to be designed. Therefore, the design is provided with a high-capacity main desalination pump and a low-capacity auxiliary desalination pump, when the demand of the desalination water user is low, the auxiliary desalination pump is used for supplying water, and when the demand of the desalination water user is high, the main desalination pump is automatically switched to supply water. The configuration adopts a relatively simplified system configuration, so that the desalted water can be supplied and switched uninterruptedly, and unnecessary energy loss and defects in operation are reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a demineralized water system of nuclear power station, including demineralized water tank (1), main demineralized water pump (5), current-limiting venturi (7), main demineralized water isolating valve (9), demineralized water main pipe manometer (11), demineralized water main pipe pressure control signal (16), supplementary demineralized water pump (18), supplementary demineralized water isolating valve (21), main demineralized water flow control signal (22) and demineralized water user (13);
the outlet of the desalting water tank (1) is respectively connected with the main desalting water pump (5) and the auxiliary desalting water pump (18);
the main desalted water pump (5) is sequentially connected with the flow-limiting venturi (7) and the main desalted water isolation valve (9), and the main desalted water isolation valve (9) is connected with a desalted water main pipe (10);
the demineralized water main pipe (10) can send demineralized water to the demineralized water user (13);
the desalted water main pipe pressure gauge (11) is arranged on the desalted water main pipe (10) and used for monitoring the pressure of the desalted water main pipe (10), when the pressure value of the desalted water main pipe pressure gauge (11) is reduced to a low-pressure setting value, the desalted water main pipe pressure control signal (16) can be released to the main desalted water pump (5), and the desalted water main pipe pressure control signal (16) can open the main desalted water pump (5) and the main desalted water isolation valve (9);
the auxiliary desalted water pump (18) is connected with the desalted water main pipe (10), the auxiliary desalted water isolation valve (21) is arranged between the auxiliary desalted water pump (18) and the desalted water main pipe (10), when the flow of the flow-limiting venturi (7) is reduced to a low flow setting value, the main desalted water flow control signal (22) can be released to the auxiliary desalted water pump (18), and the auxiliary desalted water pump (18) and the auxiliary desalted water isolation valve (21) can be opened by the main desalted water flow control signal (22).
Preferably, an automatic recirculation valve (8) is arranged on a pipeline between the flow limiting venturi (7) and the main desalted water isolation valve (9), the automatic recirculation valve (8) is connected with a recirculation pipeline (14), and the recirculation pipeline (14) is connected to an inlet of the desalted water tank (1);
when the desalted water user (13) is not available, the desalted water main pipe pressure control signal (16) and the main desalted water flow control signal (22) are locked, and the automatic recirculation valve (8) automatically opens to send the desalted water into the desalted water tank (1) through the recirculation pipe (14).
Preferably, a recirculation isolation valve (15) is arranged on the recirculation pipeline (14).
This design has configured the main demineralized water pump of high capacity and the supplementary demineralized water pump of low capacity, when the demineralized water user demand is low, supplies water with supplementary demineralized water pump, when the demineralized water user demand is high, automatic switch over to main demineralized water pump supplies water. The configuration adopts a relatively simplified system configuration, so that the desalted water can be supplied and switched uninterruptedly, and unnecessary energy loss and defects in operation are reduced.
The main desalting water pump is automatically started through the low-pressure signal control of the water supply main pipe, the auxiliary desalting water pump is switched to the main desalting water pump to supply water, and the auxiliary desalting water pump is stopped.
And switching the main desalted water pump to the auxiliary desalted water pump for water supply and stopping the main desalted water pump through the low-flow signal control of the main desalted water pump.
The outlet of the main brine pump is provided with a flow-limiting venturi which has the functions of flow monitoring, flow low control, auxiliary demineralized water pump starting and high flow limiting.
The configuration adopts a relatively simplified system configuration, so that the desalted water can be supplied and switched uninterruptedly, and unnecessary energy loss and defects in operation are reduced.
Drawings
FIG. 1 is a schematic flow diagram of a demineralized water system for a nuclear power plant;
wherein: 1-demineralized water tank; 2-an isolating valve of an outlet main pipe of the desalting water tank; 3-desalting water tank outlet main pipe; 4-main demineralized water pump inlet pipe; 5-main demineralized water pump; 6-outlet pipe of main demineralized water pump; 7-a flow-limiting venturi; 8-automatic recirculation valve; 9-main desalination water isolation valve; 10-a demineralized water main pipe; 11-demineralized water main pipe pressure gauge; 12-a main pipe flow meter; 13-users of demineralized water; 14-a recirculation conduit; 15-a recirculation isolation valve; 16-a pressure control signal of a desalted water main pipe; 17-auxiliary demineralized water pump inlet pipe; 18-auxiliary desalination pump; 19-auxiliary demineralized water pump outlet pipe; 20-auxiliary demineralized water pump outlet check valve; 21-auxiliary desalted water isolation valve; 22-main demineralized water flow control signal.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
The demineralized water system of the nuclear power station is arranged outside the containment vessel, can provide demineralized water for different users of the nuclear island, and comprises a demineralized water tank, a main demineralized water pump, an auxiliary demineralized water pump, a flow-limiting venturi, a recirculation pipeline, a valve, a meter and the like which are connected. When the unit is in low operation of the demand of the desalted water user, the desalted water tank outlet main pipe isolation valve 2 is opened, the auxiliary desalted water isolation valve 21 is opened, and the main desalted water isolation valve 9 is closed. The auxiliary demineralized water pump 18 is started to supply water to the demineralized water user 13 through the demineralized water main pipe 10, and the pressure of the demineralized water main pipe 10 is monitored by the demineralized water main pipe pressure gauge 11 in real time. When the user 13 of the desalted water increases, the pressure of the desalted water main pipe 10 decreases, when the pressure decreases to a low-pressure setting value, the main desalted water pump 5 is started through the pressure control signal 16 of the desalted water main pipe, meanwhile, the main desalted water isolation valve 9 is started, the main desalted water pump 5 supplies water to the user 13 of the desalted water, and after the flow is stable, the auxiliary desalted water pump 18 and the auxiliary desalted water isolation valve 21 are closed.
When the demineralized water user 13 decreases, the flow of the flow limiting venturi 7 gradually decreases, and when a low flow setting is reached, the auxiliary demineralized water pump 18 and the auxiliary demineralized water isolation valve 21 are opened through a main demineralized water flow control signal 22. And after the flow is stable, closing the main demineralized water pump 5 and the main demineralized water isolating valve 9.
When there is no demineralized water user 13, the demineralized water bus pressure control signal 16 and the main demineralized water flow control signal 22 are latched.
The above-mentioned process has configured the main demineralized water pump of high capacity and the supplementary demineralized water pump of low capacity, when the demineralized water user demand is low, supplies water with supplementary demineralized water pump, when the demineralized water user demand is high, through the low signal control of the female pipe pressure of supplying water, the automatic start owner demineralized water pump to switch over to main demineralized water pump and supply water. In addition, the main demineralized water pump is switched to the auxiliary demineralized water pump to supply water through the low-signal control of the flow rate of the main demineralized water pump, and the main demineralized water pump is stopped. The configuration adopts a relatively simplified system configuration, so that the desalted water can be supplied and switched uninterruptedly, and unnecessary energy loss and defects in operation are reduced.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (3)
1. A demineralized water system of a nuclear power station is characterized by comprising a demineralized water tank (1), a main demineralized water pump (5), a flow-limiting venturi (7), a main demineralized water isolation valve (9), a demineralized water main pipe pressure gauge (11), a demineralized water main pipe pressure control signal (16), an auxiliary demineralized water pump (18), an auxiliary demineralized water isolation valve (21), a main demineralized water flow control signal (22) and a demineralized water user (13);
the outlet of the desalting water tank (1) is respectively connected with the main desalting water pump (5) and the auxiliary desalting water pump (18);
the main desalted water pump (5) is sequentially connected with the flow-limiting venturi (7) and the main desalted water isolation valve (9), and the main desalted water isolation valve (9) is connected with a desalted water main pipe (10);
the demineralized water main pipe (10) can send demineralized water to the demineralized water user (13);
the desalted water main pipe pressure gauge (11) is arranged on the desalted water main pipe (10) and used for monitoring the pressure of the desalted water main pipe (10), when the pressure value of the desalted water main pipe pressure gauge (11) is reduced to a low-pressure setting value, the desalted water main pipe pressure control signal (16) can be released to the main desalted water pump (5), and the desalted water main pipe pressure control signal (16) can open the main desalted water pump (5) and the main desalted water isolation valve (9);
the auxiliary desalted water pump (18) is connected with the desalted water main pipe (10), the auxiliary desalted water isolation valve (21) is arranged between the auxiliary desalted water pump (18) and the desalted water main pipe (10), when the flow of the flow-limiting venturi (7) is reduced to a low flow setting value, the main desalted water flow control signal (22) can be released to the auxiliary desalted water pump (18), and the auxiliary desalted water pump (18) and the auxiliary desalted water isolation valve (21) can be opened by the main desalted water flow control signal (22).
2. The demineralization system of a nuclear power plant according to claim 1, characterized in that an automatic recirculation valve (8) is arranged on the conduit between said restricted venturi (7) and said main demineralization isolation valve (9), said automatic recirculation valve (8) being connected to a recirculation conduit (14), said recirculation conduit (14) being connected to the inlet of said demineralization tank (1);
when the desalted water user (13) is not available, the desalted water main pipe pressure control signal (16) and the main desalted water flow control signal (22) are locked, and the automatic recirculation valve (8) automatically opens to send the desalted water into the desalted water tank (1) through the recirculation pipe (14).
3. A desalination system for nuclear power plants according to claim 2, characterized in that the recirculation conduit (14) is provided with a recirculation isolation valve (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020605178.XU CN212061892U (en) | 2020-04-21 | 2020-04-21 | Demineralized water system of nuclear power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020605178.XU CN212061892U (en) | 2020-04-21 | 2020-04-21 | Demineralized water system of nuclear power station |
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| Publication Number | Publication Date |
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| CN212061892U true CN212061892U (en) | 2020-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020605178.XU Active CN212061892U (en) | 2020-04-21 | 2020-04-21 | Demineralized water system of nuclear power station |
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| CN (1) | CN212061892U (en) |
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2020
- 2020-04-21 CN CN202020605178.XU patent/CN212061892U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No. 29 Hong Cao Road, Xuhui District, Shanghai Patentee after: Shanghai Nuclear Engineering Research and Design Institute Co.,Ltd. Address before: No. 29 Hong Cao Road, Xuhui District, Shanghai Patentee before: SHANGHAI NUCLEAR ENGINEERING RESEARCH & DESIGN INSTITUTE Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |