CN105702306A - Open type cooling water anti-overcooling system and open type cooling water anti-overcooling method for nuclear power plant - Google Patents
Open type cooling water anti-overcooling system and open type cooling water anti-overcooling method for nuclear power plant Download PDFInfo
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- CN105702306A CN105702306A CN201610192402.5A CN201610192402A CN105702306A CN 105702306 A CN105702306 A CN 105702306A CN 201610192402 A CN201610192402 A CN 201610192402A CN 105702306 A CN105702306 A CN 105702306A
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- cooling water
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21D—NUCLEAR POWER PLANT
- G21D1/00—Details of nuclear power plant
- G21D1/02—Arrangements of auxiliary equipment
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
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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
Abstract
The invention discloses an open type cooling water anti-overcooling system and an open type cooling water anti-overcooling method for a nuclear power plant. The open type cooling water anti-overcooling system comprises the components of an open type cooling water booster pump set which is communicated with a water supply, an open type cooling water inlet pipe which is communicated with the open type cooling water booster pump set, an open type cooling water heat exchange pipe which is communicated with the open type cooling water inlet pipe, an open type cooling water outlet pipe which is communicated with the open type cooling water heat exchange pipe, and an open type cooling water bypass which is connected with the open type cooling water outlet pipe in parallel. The open type cooling water heat exchange pipe comprises the components of a heat exchange regulating valve which is communicated with the open type cooling water inlet pipe, a heat exchanger which is communicated with the heat exchange regulating valve and the open type cooling water outlet pipe, and an auxiliary machine closed cooling water pipe which penetrates through the heat exchanger. The open type cooling water bypass comprises a bypass regulating valve which is communicated with the open type cooling water inlet pipe and the open type cooling water outlet pipe. The open type cooling water anti-overcooling system and the open type cooling water anti-overcooling method have advantages of realizing adjustment on temperature of the auxiliary machine closed cooling water, preventing overlow temperature of the auxiliary machine closed cooling water pipe in relatively low ambient temperature, and ensuring safe and stable operation of the nuclear power plant set.
Description
Technical field
The present invention relates to cooling system for nuclear power plant technical field, prevent supercool system and method particularly to a kind of nuclear power plant open type cooling water。
Background technology
Nuclear power plant is typically provided open cooling water system, is used for cooling down subsidiary engine enclosed cooling water, thus taking away subsidiary engine to run the heat produced, it is ensured that unit runs continually and steadily。Open type cooling water temperature is relevant with local environment temperature, and the temperature of subsidiary engine enclosed cooling water is generally high 3～5 DEG C than open type cooling water temperature。Most domestic nuclear power plant build south in, and ambient temperature is higher, and open type cooling water temperature will not be too low, does not result in subsidiary engine enclosed cooling water supercool, and the open cooling water system that therefore existing nuclear power plant uses all does not have lower water temperature function。
But, apply existing open cooling water system, subsidiary engine enclosed cooling water temperature can not regulate, owing to ambient temperature is relatively low during winter, subsidiary engine enclosed cooling water temperature is easily caused too low in the north or other colder local nuclear power stations, exceed subsidiary engine tolerance range, it is impossible to ensure unit safety stable operation。
Summary of the invention
Based on this, for the problems referred to above, the present invention proposes a kind of nuclear power plant open type cooling water and prevents supercool system and method, can subsidiary engine enclosed cooling water temperature be adjusted, prevent the subsidiary engine enclosed cooling water temperature when ambient temperature is relatively low too low, it is ensured that unit safety stable operation。
Its technical scheme is as follows:
A kind of nuclear power plant open type cooling water is anti-crosses cooling system, open type cooling water booster group including connection water source, connect the open type cooling water inlet pipe of described open type cooling water booster group, connect the open type cooling water heat exchanging pipe of described open type cooling water inlet pipe, connect the open type cooling water outlet pipe of described open type cooling water heat exchanging pipe；What described open type cooling water heat exchanging pipe included connecting described open type cooling water inlet pipe changes heat regulating valve, changes heat regulating valve and the heat exchanger of described open type cooling water outlet pipe, and be arranged in the subsidiary engine enclosed cooling water pipeline of described heat exchanger described in connection；Also including cooling down, with described open type, the open type cooling water bypass that water heat exchanging pipe is in parallel, described open type cooling water bypass includes the bypass valve connecting described open type cooling water inlet pipe with open type cooling water outlet pipe。
When the subsidiary engine enclosed cooling water temperature in subsidiary engine enclosed cooling water pipeline low to a certain extent time, start to regulate the heat exchanger of the bypass valve of open type cooling water bypass and open type cooling water heat exchanging pipe entrance side change heat regulating valve, making a part of open type cooling water that open type cooling water booster group pumps walk the heat exchanger of open type cooling water heat exchanging pipe, another part open type cooling water walks open type cooling water bypass。It is thus possible to decrease the open type cooling water inflow entering heat exchanger, increase the temperature difference of the cold and hot end of heat exchanger, improve subsidiary engine enclosed cooling water temperature to reach requirement temperature, reach to regulate the purpose of water temperature。
Below its further technical scheme is illustrated:
Further, also including the pressure transducer being arranged between described open type cooling water inlet pipe and open type cooling water heat exchanging pipe, described pressure transducer electrically connects with described bypass valve。Pressure transducer on the open type cooling water inlet pipe of open type cooling water booster group outlet, can the bypass valve of opposite opened cooling water bypass be controlled, it is easy to the aperture size of bypass valve is adjusted, to adjust open type cooling water booster group outlet pressure size, open type cooling water booster group outlet pressure is made to fluctuate in allowed band, to ensure unit safety stable operation。
Further, described open type cooling water heat exchanging pipe also includes the temperature sensor being arranged on described subsidiary engine enclosed cooling water pipeline, and described temperature sensor electrically connects with the described heat regulating valve that changes。The heat regulating valve that changes of the entrance side setting of heat exchanger is controlled by the temperature sensor signal arranged on subsidiary engine enclosed cooling water pipeline, scalable heat exchange control valve opening size, to regulate the open type cooling water flow entering heat exchanger, control subsidiary engine enclosed cooling water temperature, make subsidiary engine enclosed cooling water temperature desired value for being not less than 15 DEG C。
Further, described open type cooling water heat exchanging pipe includes open type cooling water heat exchange main line, the main heat exchange that described open type cooling water heat exchange main line includes connecting with described open type cooling water inlet pipe regulates valve, regulating, with described main heat exchange, the main heat exchanger that valve connects, described main heat exchanger connects with described open type cooling water outlet pipe；And the open type cooling water heat exchange auxiliary piping that water heat exchange main line is in parallel is cooled down with described open type, the auxiliary heat-exchanging that described open type cooling water heat exchange auxiliary piping includes connecting with described open type cooling water inlet pipe regulates valve, regulating, with described auxiliary heat-exchanging, the supplementary heat exchanger that valve connects, described supplementary heat exchanger connects with described open type cooling water outlet pipe。By arranging open type cooling water heat exchange main line and the open type cooling water heat exchange auxiliary piping of parallel connection, can open type cool down water heat exchange main line break down time, open type is cooled down water heat exchange auxiliary piping and brings standby, to ensure that subsidiary engine enclosed cooling water heat transfer process is normally carried out, it is ensured that unit safety stable operation。
Further, the heat exchange that described open type cooling water heat exchanging pipe also includes being arranged between described heat exchanger and described open type cooling water outlet pipe manually switches off valve, and described in change heat regulating valve and be set to the electronic shut-off valve of heat exchange。Heat regulating valve will be changed and be set to the electronic shut-off valve of heat exchange, automatically valve opening can be adjusted under the control of temperature sensor。Additionally also set up heat exchange and manually switch off valve, it is possible to opposite opened cooling water heat exchanging pipe carries out manual adjustments or shutoff, safe and reliable。
Further, described open type cooling water bypass also includes connecting the first bypass of described open type cooling water inlet pipe and described bypass valve and manually switches off valve, and the second bypass connecting described bypass valve and described open type cooling water outlet pipe manually switches off valve。First bypass manually switches off valve and the second bypass manually switches off valve and can be complete switched off by bypass valve, it is possible to opposite opened cooling water bypass is performed manually by adjustment, safe and reliable。
Additionally, the present invention also proposes, a kind of nuclear power plant open type cooling water is anti-crosses cooling method, comprises the steps:
S100, conveying open type cooling water cool down to open type in the heat exchanger of water heat exchanging pipe, cool down water with the subsidiary engine enclosed flowing through heat exchanger and carry out heat exchange；
S200, when the undesirable temperature of the subsidiary engine enclosed cooler-water temperature after heat exchange being detected, regulate the bypass valve changed in heat regulating valve and open type cooling water bypass of open type cooling water heat exchanging pipe, regulate the open type cooling water flow entered in heat exchanger, until subsidiary engine enclosed cooler-water temperature reaches requirement temperature。
Further, step S200 also comprises the steps:
S210, detect that subsidiary engine enclosed cooling water temperature is lower than when requiring temperature, the heat regulating valve that changes to the heat exchanger entrance side that open type cools down water heat exchanging pipe sends adjustment information, change after heat regulating valve receives adjustment signal and reduce valve opening, reduce the open type cooling water flow entered in heat exchanger, raise subsidiary engine enclosed cooling water temperature；After reducing the open type cooling water flow entered in heat exchanger, open type cooling water booster group outlet pressure becomes big, detecting that pressure becomes big backward bypass valve and sends adjustment signal, bypass valve increases valve opening after receiving signal, and open type cooling water booster group outlet pressure returns to setting value；
S220, detect that subsidiary engine enclosed cooling water temperature raises after, send adjustment information to changing heat regulating valve, change after heat regulating valve receives adjustment signal and increase valve opening, increase the open type cooling water flow entered in heat exchanger, reduce subsidiary engine enclosed cooling water temperature；After increasing the open type cooling water flow entered in heat exchanger, open type cooling water booster group outlet pressure diminishes, detecting that the pressure backward bypass valve that diminishes sends adjustment signal, bypass valve reduces valve opening after receiving signal, and open type cooling water booster group outlet pressure returns to setting value；
S230, repeat the above steps S210 and S220, until subsidiary engine enclosed cooling water temperature reaches requirement temperature, and open type cooling water booster group outlet pressure is stable in allowed band。
Further, changing heat regulating valve when regulating the open type cooling water flow entered in heat exchanger, front and back regulate the interval being provided with 1-3 minute between action for twice。The heat exchange at heat exchanger entrance place regulates valve regulation frequency can not be too high, certain time interval is had between every twice action, so that the regulating effect of valve last time action can be correctly fed back in temperature sensor on subsidiary engine enclosed cooling water pipeline, provide foundation accurately for valve event next time。
The present invention has following prominent beneficial effect: can guarantee that subsidiary engine enclosed cooling water temperature controls more than 15 DEG C, fully meets in the requirement to subsidiary engine enclosed cooling water temperature of the ambient temperature relatively low northern nuclear power station subsidiary engine equipment, it is ensured that unit safety stable operation。
Accompanying drawing explanation
Fig. 1 is the anti-structural schematic block diagram crossing cooling system of cooling water of nuclear power plant's open type described in the embodiment of the present invention；
Fig. 2 is the anti-step schematic block diagram crossing cooling method of cooling water of nuclear power plant's open type described in the embodiment of the present invention。
Description of reference numerals:
100-open type cooling water booster group, 200-open type cooling water inlet pipe, 210-pressure transducer, 300-open type cooling water heat exchanging pipe, 310-open type cooling water heat exchange main line, 312-main heat exchanger, 314-main heat exchange regulates valve, and 302-heat exchange manually switches off valve, 320-open type cooling water heat exchange auxiliary piping, 322-supplementary heat exchanger, 324-auxiliary heat-exchanging regulates valve, 400-open type cooling water bypass, 410-bypass valve, 420-the first bypass manually switches off valve, and 430-the second bypass manually switches off valve, 500-open type cooling water outlet pipe。
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiments of the invention are described in detail。
As shown in Figure 1, the present invention proposes a kind of nuclear power plant anti-cooling system excessively of open type cooling water, open type cooling water booster group 100 including connection water source, connect the open type cooling water inlet pipe 200 of described open type cooling water booster group 100, connect the open type cooling water heat exchanging pipe 300 of described open type cooling water inlet pipe 200, connect the open type cooling water outlet pipe 500 of described open type cooling water heat exchanging pipe 300, and cool down, with described open type, the open type cooling water bypass 400 that water heat exchanging pipe 300 is in parallel。What described open type cooling water heat exchanging pipe 300 included connecting described open type cooling water inlet pipe 200 changes heat regulating valve, change heat regulating valve and the heat exchanger of described open type cooling water outlet pipe 500 described in connection, and be arranged in the subsidiary engine enclosed cooling water pipeline of described heat exchanger。Described open type cooling water bypass 400 includes the bypass valve 410 connecting described open type cooling water inlet pipe 200 with open type cooling water outlet pipe 500。
When the subsidiary engine enclosed cooling water temperature in subsidiary engine enclosed cooling water pipeline low to a certain extent time, start to regulate the heat exchanger of the bypass valve 410 of open type cooling water bypass 400 and open type cooling water heat exchanging pipe 300 entrance side change heat regulating valve, making a part of open type cooling water that open type cooling water booster group 100 pumps walk the heat exchanger of open type cooling water heat exchanging pipe 300, another part open type cooling water walks open type cooling water bypass 400。Such that it is able to decrease the open type cooling water inflow entering heat exchanger, increase the temperature difference of the cold and hot end of heat exchanger, improve subsidiary engine enclosed cooling water temperature to reach requirement temperature, reach to regulate the purpose of water temperature。
And, above-mentioned nuclear power plant open type cooling water is anti-crosses the pressure transducer 210 that cooling system also includes being arranged between described open type cooling water inlet pipe 200 and open type cooling water heat exchanging pipe 300, and described pressure transducer 210 electrically connects with described bypass valve 410。Pressure transducer 210 on the open type cooling water inlet pipe 200 of open type cooling water booster group 100 outlet, can the bypass valve 410 of opposite opened cooling water bypass 400 be controlled, it is easy to the aperture size of bypass valve 410 is adjusted, to adjust open type cooling water booster group 100 outlet pressure size, open type cooling water booster group 100 outlet pressure is made to fluctuate in allowed band, to ensure unit safety stable operation。
In addition, described open type cooling water bypass 400 also includes connecting the first bypass of described open type cooling water inlet pipe 200 and described bypass valve 410 and manually switches off valve 420, and the second bypass connecting described bypass valve 410 and described open type cooling water outlet pipe 500 manually switches off valve 430。First bypass manually switches off valve 420 and the second bypass manually switches off valve 430 and by completely manual for bypass valve 410 shutoff, can be complete switched off by open type cooling water bypass 400。In addition, it is possible with the first bypass and manually switches off valve 420 and the second bypass manually switches off valve 430, opposite opened cooling water bypass 400 is performed manually by adjustment, it is achieved the manual adjustments to the open type cooling water flow flowing through open type cooling water bypass 400, it is ensured that open type cooling water bypass 400 runs safely and reliably。
Additionally, the temperature sensor that described open type cooling water heat exchanging pipe 300 also includes being arranged on described subsidiary engine enclosed cooling water pipeline (not shown in the figures anticipate out), described temperature sensor electrically connects with the described heat regulating valve that changes。The heat regulating valve that changes of the entrance side setting of heat exchanger is controlled by the temperature sensor signal arranged on subsidiary engine enclosed cooling water pipeline, scalable heat exchange control valve opening size, to regulate the open type cooling water flow entering heat exchanger, control subsidiary engine enclosed cooling water temperature, subsidiary engine enclosed cooling water temperature desired value is made to be not less than design temperature (such as 15 DEG C, it is alternatively other temperature, to ensure the requirement to subsidiary engine enclosed coolant water temperature of the nuclear power station subsidiary engine equipment)。
And, the heat exchange that described open type cooling water heat exchanging pipe 300 also includes being arranged between described heat exchanger and described open type cooling water outlet pipe manually switches off valve 302, and described in change heat regulating valve and be set to the electronic shut-off valve of heat exchange。Heat regulating valve will be changed and be set to the electronic shut-off valve of heat exchange, and automatically valve opening can be adjusted under the control of temperature sensor, facilitate rapidly。Additionally also set up heat exchange and manually switch off valve, it is possible to opposite opened cooling water heat exchanging pipe 300 carries out manual adjustments or shutoff, safe and reliable。
And, described open type cooling water heat exchanging pipe 300 includes open type cooling water heat exchange main line 310, the main heat exchange that described open type cooling water heat exchange main line 310 includes connecting with described open type cooling water inlet pipe 200 regulates valve 314, regulating, with described main heat exchange, the main heat exchanger 312 that valve 314 connects, described main heat exchanger 312 connects with described open type cooling water outlet pipe 500；And the open type cooling water heat exchange auxiliary piping 320 that water heat exchange main line 310 is in parallel is cooled down with described open type, the auxiliary heat-exchanging that described open type cooling water heat exchange auxiliary piping 320 includes connecting with described open type cooling water inlet pipe 200 regulates valve 324, regulating, with described auxiliary heat-exchanging, the supplementary heat exchanger 322 that valve 324 connects, described supplementary heat exchanger 322 connects with described open type cooling water outlet pipe 500。By arranging open type cooling water heat exchange main line 310 and the open type cooling water heat exchange auxiliary piping 320 of parallel connection, can open type cool down water heat exchange main line 310 break down time, open type is cooled down water heat exchange auxiliary piping 320 and brings standby, to ensure that subsidiary engine enclosed cooling water heat transfer process is normally carried out, it is ensured that unit safety stable operation。Can also when open type cool down water heat exchange main line 310 heat exchange amount inadequate, enable simultaneously open type cooling water heat exchange auxiliary piping 320, increase to subsidiary engine enclosed cool down water heat exchange amount so that it is reach the temperature of requirement。
Additionally, as in figure 2 it is shown, the present invention also proposes, a kind of nuclear power plant open type cooling water is anti-crosses cooling method, comprises the steps:
Open type cooling water pump is entered open type cooling water inlet pipe 200 by S100, open type cooling water booster group 100, and by open type cooling water inlet pipe 200, open type is cooled down in the heat exchanger that water is transported to open type cooling water heat exchanging pipe 300, make open type cooling water cool down water with the subsidiary engine enclosed in the subsidiary engine enclosed cooling water pipeline flowing through heat exchanger and carry out heat exchange, to reduce subsidiary engine enclosed cooling water temperature；
Low subsidiary engine enclosed cooling water temperature is monitored by temperature sensor in real time that arrange on S200, subsidiary engine enclosed cooling water pipeline, when the undesirable temperature of the subsidiary engine enclosed cooler-water temperature after heat exchange being detected, regulate the bypass valve 410 changed in heat regulating valve and open type cooling water bypass 400 of open type cooling water heat exchanging pipe 300, regulate the open type cooling water flow entered in heat exchanger, to regulate open type cooling water and the heat exchange amount of subsidiary engine enclosed cooling water, until subsidiary engine enclosed cooler-water temperature reaches requirement temperature。
Further, step S200 comprises the steps:
S210, temperature sensor detect that subsidiary engine enclosed cooling water temperature is lower than when requiring temperature, temperature sensor sends adjustment information to the heat regulating valve that changes of the heat exchanger entrance side that open type cools down water heat exchanging pipe 300, change after heat regulating valve receives adjustment signal and reduce valve opening, reduce the open type cooling water flow entered in heat exchanger, raise subsidiary engine enclosed cooling water temperature；After reducing the open type cooling water flow entered in heat exchanger, open type cooling water booster group 100 outlet pressure becomes big, pressure transducer 210 detects that pressure becomes big backward bypass valve 410 and sends adjustment signal, bypass valve 410 increases valve opening after receiving signal, increasing the open type cooling water flow flowing through open type cooling water bypass 400, open type cooling water booster group 100 outlet pressure returns to setting value；
After S220, temperature sensor detect that subsidiary engine enclosed cooling water temperature raises, temperature sensor sends adjustment information to changing heat regulating valve, change after heat regulating valve receives adjustment signal and increase valve opening, increase the open type cooling water flow entered in heat exchanger, reduce subsidiary engine enclosed cooling water temperature；After increasing the open type cooling water flow entered in heat exchanger, open type cooling water booster group 100 outlet pressure diminishes, pressure transducer 210 detects that the pressure backward bypass valve 410 that diminishes sends adjustment signal, bypass valve 410 reduces valve opening after receiving signal, and open type cooling water booster group 100 outlet pressure returns to setting value；
S230, repeat the above steps S210 and S220, until subsidiary engine enclosed cooling water temperature reaches requirement temperature, and open type cooling water booster group 100 outlet pressure is stable in allowed band。
And, change heat regulating valve when regulating the open type cooling water flow entered in heat exchanger, front and back regulate the interval being provided with 1-3 minute between action for twice。The heat exchange at heat exchanger entrance place regulates valve regulation frequency can not be too high, certain time interval is had between every twice action, so that the regulating effect of valve last time action can be correctly fed back in temperature sensor on subsidiary engine enclosed cooling water pipeline, provide foundation accurately for valve event next time。
Nuclear power plant's open type cooling water that the present invention proposes prevents supercool system and method, can guarantee that subsidiary engine enclosed cooling water temperature controls more than 15 DEG C, fully meet the north or other cold area when ambient temperature is relatively low, the nuclear power station subsidiary engine equipment requirement to subsidiary engine enclosed coolant water temperature, it is ensured that unit safety stable operation。
Each technical characteristic of embodiment described above can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics is absent from contradiction, all it is considered to be the scope that this specification is recorded。
Embodiment described above only have expressed the several embodiments of the present invention, and it describes comparatively concrete and detailed, but can not therefore be construed as limiting the scope of the patent。It should be pointed out that, for the person of ordinary skill of the art, without departing from the inventive concept of the premise, it is also possible to making some deformation and improvement, these broadly fall into protection scope of the present invention。Therefore, the protection domain of patent of the present invention should be as the criterion with claims。
Claims (9)
1. nuclear power plant's anti-cooling system excessively of open type cooling water, it is characterized in that, open type cooling water booster group including connection water source, connect the open type cooling water inlet pipe of described open type cooling water booster group, connect the open type cooling water heat exchanging pipe of described open type cooling water inlet pipe, connect the open type cooling water outlet pipe of described open type cooling water heat exchanging pipe；
What described open type cooling water heat exchanging pipe included connecting described open type cooling water inlet pipe changes heat regulating valve, changes heat regulating valve and the heat exchanger of described open type cooling water outlet pipe, and be arranged in the subsidiary engine enclosed cooling water pipeline of described heat exchanger described in connection；
Also including cooling down, with described open type, the open type cooling water bypass that water heat exchanging pipe is in parallel, described open type cooling water bypass includes the bypass valve connecting described open type cooling water inlet pipe with open type cooling water outlet pipe。
2. nuclear power plant according to claim 1 open type cooling water is anti-crosses cooling system, it is characterized in that, also including the pressure transducer being arranged between described open type cooling water inlet pipe and open type cooling water heat exchanging pipe, described pressure transducer electrically connects with described bypass valve。
3. nuclear power plant according to claim 1 open type cooling water is anti-crosses cooling system, it is characterized in that, described open type cooling water heat exchanging pipe also includes the temperature sensor being arranged on described subsidiary engine enclosed cooling water pipeline, and described temperature sensor electrically connects with the described heat regulating valve that changes。
4. nuclear power plant according to claim 1 open type cooling water is anti-crosses cooling system, it is characterized in that, described open type cooling water heat exchanging pipe includes open type cooling water heat exchange main line, the main heat exchange that described open type cooling water heat exchange main line includes connecting with described open type cooling water inlet pipe regulates valve, regulating, with described main heat exchange, the main heat exchanger that valve connects, described main heat exchanger connects with described open type cooling water outlet pipe；
And with described open type cool down water heat exchange main line in parallel and open type cool down water heat exchange auxiliary piping, the auxiliary heat-exchanging that described open type cooling water heat exchange auxiliary piping includes connecting with described open type cooling water inlet pipe regulates valve, regulating, with described auxiliary heat-exchanging, the supplementary heat exchanger that valve connects, described supplementary heat exchanger connects with described open type cooling water outlet pipe。
5. nuclear power plant according to claim 1 open type cooling water is anti-crosses cooling system, it is characterized in that, the heat exchange that described open type cooling water heat exchanging pipe also includes being arranged between described heat exchanger and described open type cooling water outlet pipe manually switches off valve, and described in change heat regulating valve and be set to the electronic shut-off valve of heat exchange。
6. nuclear power plant according to claim 1 open type cooling water is anti-crosses cooling system, it is characterized in that, described open type cooling water bypass also includes connecting the first bypass of described open type cooling water inlet pipe and described bypass valve and manually switches off valve, and the second bypass connecting described bypass valve and described open type cooling water outlet pipe manually switches off valve。
7. nuclear power plant's anti-cooling method excessively of open type cooling water, it is characterised in that comprise the steps:
S100, conveying open type cooling water cool down to open type in the heat exchanger of water heat exchanging pipe, cool down water with the subsidiary engine enclosed flowing through heat exchanger and carry out heat exchange；
S200, when the undesirable temperature of the subsidiary engine enclosed cooler-water temperature after heat exchange being detected, regulate the bypass valve changed in heat regulating valve and open type cooling water bypass of open type cooling water heat exchanging pipe, regulate the open type cooling water flow entered in heat exchanger, until subsidiary engine enclosed cooler-water temperature reaches requirement temperature。
8. nuclear power plant according to claim 7 open type cooling water is anti-crosses cooling method, it is characterised in that step S200 also comprises the steps:
S210, detect that subsidiary engine enclosed cooling water temperature is lower than when requiring temperature, the heat regulating valve that changes to the heat exchanger entrance side that open type cools down water heat exchanging pipe sends adjustment information, change after heat regulating valve receives adjustment signal and reduce valve opening, reduce the open type cooling water flow entered in heat exchanger, raise subsidiary engine enclosed cooling water temperature；After reducing the open type cooling water flow entered in heat exchanger, open type cooling water booster group outlet pressure becomes big, detecting that pressure becomes big backward bypass valve and sends adjustment signal, bypass valve increases valve opening after receiving signal, and open type cooling water booster group outlet pressure returns to setting value；
S220, detect that subsidiary engine enclosed cooling water temperature raises after, send adjustment information to changing heat regulating valve, change after heat regulating valve receives adjustment signal and increase valve opening, increase the open type cooling water flow entered in heat exchanger, reduce subsidiary engine enclosed cooling water temperature；After increasing the open type cooling water flow entered in heat exchanger, open type cooling water booster group outlet pressure diminishes, detecting that the pressure backward bypass valve that diminishes sends adjustment signal, bypass valve reduces valve opening after receiving signal, and open type cooling water booster group outlet pressure returns to setting value；
S230, repeat the above steps S210 and S220, until subsidiary engine enclosed cooling water temperature reaches requirement temperature, and open type cooling water booster group outlet pressure is stable in allowed band。
9. nuclear power plant according to claim 7 open type cooling water is anti-crosses cooling method, it is characterised in that changing heat regulating valve when regulating the open type cooling water flow entered in heat exchanger, front and back regulate the interval being provided with 1-3 minute between action for twice。
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Application publication date: 20160622 |