CN201954251U - Nuclear power station compressed air vessel system - Google Patents
Nuclear power station compressed air vessel system Download PDFInfo
- Publication number
- CN201954251U CN201954251U CN2010205678456U CN201020567845U CN201954251U CN 201954251 U CN201954251 U CN 201954251U CN 2010205678456 U CN2010205678456 U CN 2010205678456U CN 201020567845 U CN201020567845 U CN 201020567845U CN 201954251 U CN201954251 U CN 201954251U
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- CN
- China
- Prior art keywords
- compressed air
- nuclear power
- power station
- air cylinder
- dump valve
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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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 relates to a nuclear power station compressed air vessel system, including a compressed air vessel which is provided with an air inlet and outlet pipe interface and a scavenging pipe interface; the air inlet and outlet pipe interface is arranged on a side wall of the compressed air vessel; and the scavenging pipe interface is disposed on the bottom of the compressed air vessel. The utility model fully uses the prior art, skillfully prevents the impurities from entering into the core member of the safety system through the improvement in a small range and discharges the impurities with a high efficiency so as to increase the availability ratio of the nuclear power station and enhance the economical efficiency of the operation of the nuclear power station.
Description
Technical field
The utility model relates to CPR1000 pressurized-water reactor nuclear power plant field of security systems, more particularly, relates to a kind of nuclear power station pressurized air can system.
Background technique
In the existing design of the GCT-A turbine by-pass row Atmosphere System of CPR1000 pressurized-water reactor nuclear power plant, every atmospheric dump valve all disposes the compressed air cylinder of a safe level, and the pressurized air that 6h can be provided when compressed air system lost efficacy is for the airborne release valve events.The utility model promptly is optimized design at the air supply system of this compressed air cylinder, in the existing design, the middle part of compressed air cylinder is provided with the scavenging conduit interface, the bottom is provided with air turnover interface tube, because there is the wearing and tearing impurity of partial corrosion product and equipment auxiliary material in compressed air system, these corrosion productss and wearing and tearing impurity enter the pressurized air pot bottom, thereby make the steam of safe level arrange the pneumatic positioner formation obstruction of atmospheric dump valve, because the scavenging conduit interface is located at the middle part of compressed air cylinder, be difficult to get rid of condensation product and other impurity again thereby make purging move.Domestic once the generation because this valve blockage and the incident of scram has had a strong impact on nuclear safety and nuclear power station availability.
According to turbine by-pass row Atmosphere System operating experience feedback, unavoidably there is certain impurity in compressed air system, comprise condensation product, exsiccator powder and pipeline, corrosion products in the container, these impurity enter into behind the compressed air cylinder because action of gravity, often accumulate in the pressurized air pot bottom, when the airborne release valve events, because the High Pressure Difference in the compressed air cylinder between air and the valve pneumatic positioner, the air velocity at the compressed air outlet place of pot bottom can reach 150～200m/s, Flow Field Distribution herein makes that impurity is easy to just enter the valve pneumatic positioner along pipeline, thereby causes positioning work piece to stop up.
The model utility content
The technical problems to be solved in the utility model is that the susceptible to plugging defective of above-mentioned steam row's atmosphere atmospheric dump valve at prior art provides a kind of nuclear power station pressurized air can system.
The technological scheme that its technical problem that solves the utility model adopts is: construct a kind of nuclear power station pressurized air can system, comprise compressed air cylinder, this compressed air cylinder is provided with air turnover interface tube and scavenging conduit interface, described air turnover interface tube is located on the sidewall of described compressed air cylinder, and described scavenging conduit interface is located at the bottom of described compressed air cylinder.
In a kind of nuclear power station pressurized air can system described in the utility model, described pressurized air turnover interface tube is located at the sidewall middle part of described compressed air cylinder.
Described scavenging conduit interface is located at the bottom centre place of described compressed air cylinder.
Described air turnover interface tube place is connected with an air turnover pipe, and described scavenging conduit jointing is connected with a scavenging conduit.
Described atmospheric dump valve is pneumatic atmospheric dump valve.
Described atmospheric dump valve comprises a pneumatic positioner; Described atmospheric dump valve is installed on the steam tube.
Described air turnover pipe by two interfaces provided thereon respectively with being connected of atmospheric dump valve and compressed air system; The output terminal of described compressed air system is equipped with stop valve.
Implement a kind of nuclear power station pressurized air can system of the present utility model, have following beneficial effect:
1, the utility model is avoided compressed air cylinder inner bottom part accumulation of impurities place, and by the checking computational analysis, the position of air ports interface tube is arranged on the outer side wall of compressed air cylinder, make impurity be difficult for entering in the atmospheric dump valve, reduced the failure risk of turbine by-pass row's Atmosphere System under accident conditions.
2, the utility model is located at the bottom of compressed air cylinder with the scavenging conduit interface position, has improved purging efficient, and impurity is farthest discharged before unit operation.
In a word, the utility model makes full use of prior art, by improvement more among a small circle, has reduced impurity dexterously and has entered the safety system core component, efficiently discharges impurity simultaneously, thereby has improved the availability of nuclear power station, has improved the Economy of nuclear power station operation.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the structural representation of a kind of nuclear power station pressurized air of the utility model can system;
Fig. 2 is the structural representation of a kind of nuclear power station pressurized air can system in the prior art;
Embodiment
As shown in Figure 1, in a kind of nuclear power station pressurized air of the utility model can system, comprise compressed air cylinder 1, this compressed air cylinder 1 is provided with air turnover interface tube and scavenging conduit interface, air turnover interface tube is located on the sidewall middle part of compressed air cylinder 1, make impurity be difficult for entering in the atmospheric dump valve, reduced the actual effect risk of turbine by-pass row's Atmosphere System under accident conditions; The scavenging conduit interface is located at the bottom centre place of compressed air cylinder 1, has improved purging efficient, and impurity is farthest discharged before unit operation.
Air turnover interface tube place is connected with an air turnover pipe 3, and described scavenging conduit jointing is connected with a scavenging conduit 2.
Dynamic duty process of the present utility model is: when nuclear power station normally moves, be full of compressed air cylinder 1 from the air (about 7～9.5bar g) of compressed air system 6, when 4 actions of needs atmospheric dump valve, pressurized air makes valve event by the air cavity that the pneumatic positioner on the valve enters atmospheric dump valve 4, compressed air system 6 online additional pressurized air make compressed air cylinder 1 internal pressure maintain between 7～9bar simultaneously.When having an accident, if lose compressed air system 6, the gas that stores in the compressed air cylinder 1 can use 6h for atmospheric dump valve 4.Because air turnover pipe 3 interfaces are positioned at compressed air cylinder 1 sidewall middle part, the scavenging conduit 2 that passes through the bottom when safeguarding has on the one hand been discharged the impurity in the gas tank, on the other hand, even there is the impurity that accumulates in compressed air cylinder 1 bottom, also be difficult to enter gas supply line by gas tank sidewall middle part, and then enter the valve pneumatic positioner of atmospheric dump valve 4, therefore avoided the valve pneumatic positioner to stop up.When unit is in hot shutdown condition, need GCT-A turbine by-pass row Atmosphere System to carry out the action that compressed air cylinder 1 purges, because scavenging conduit 2 interfaces are positioned at the bottom of compressed air cylinder 1, so, purge condensation product and other impurity that action is easy to discharge compressed air cylinder 1 bottom.
As shown in Figure 2, in prior art turbine by-pass venting gas appliance, compressed air cylinder is provided with two interfaces: one is the scavenging conduit interface that is positioned at the compressed air cylinder middle part; Another is the air turnover interface tube that is positioned at the pressurized air pot bottom; When the power station is normally moved, (about 7～9.5barg) have been full of compressed air cylinder to the air that comes from compressed air system, when needs airborne release valve events, pressurized air enters the modulating valve air cavity by the pneumatic positioner on the valve and makes valve event, when having an accident, if the compressed air system of losing, the gas that stores in the compressed air cylinder can use 6h for atmospheric dump valve, because air turnover interface tube is positioned at the pressurized air pot bottom, and the air velocity at the compressed air outlet place of high pressure official post pot bottom can reach 150～200m/s, Flow Field Distribution herein makes the impurity that accumulates in the pressurized air pot bottom be easy to just enter the valve pneumatic positioner along pipeline, thereby causes positioning work piece to stop up; When unit is in hot shutdown condition, need the GCT-A system to carry out the action that compressed air cylinder purges, because the scavenging conduit interface is positioned at the compressed air cylinder middle part, purge condensation product and other impurity that action is difficult to discharge the pressurized air pot bottom.
In pressurized air can system of the present utility model, in exhaust process, the compressed air cylinder internal pressure is kept homogeneous, is about about 9bar (gauge pressure) in the exhaust starting stage;
The pressure field gradient concentrates on exhaust outlet place, compressed air cylinder middle part, and the pressure reduction can reach 4bar (gauge pressure) herein, promptly is reduced to about 5bar (gauge pressure) from 9bar (gauge pressure), though pressure gradient is big, does not influence the pressure distribution at other positions herein;
In exhaust process, the exhaust outlet place that the velocity field gradient concentrates on the compressed air cylinder middle part can reach 150～200m/s at exit velocity, but homogeneous is kept in compressed air cylinder internal speed field, remains 0m/s substantially;
Though pressure, the velocity gradient of improving the back air outlet slit are still very big, only be present in the middle part of compressed air cylinder, and the speed at other positions is zero substantially in the gas tank, even therefore there is certain impurity in the gas tank bottom, also is difficult to take out of by air-flow.
In the pressurized air can system of prior art, in exhaust process, the compressed air cylinder internal pressure is kept homogeneous, is about about 9bar (gauge pressure) in the exhaust starting stage;
The pressure field gradient concentrates on the exhaust outlet place of pressurized air pot bottom, and the pressure reduction can reach 4bar (gauge pressure) herein, promptly is reduced to about 5bar (gauge pressure) from 9bar (gauge pressure);
In exhaust process, homogeneous is kept in compressed air cylinder internal speed field, remains 0m/s substantially;
The velocity field gradient concentrates on compressed air cylinder base bleed outlet port, can reach 150～200m/s at exit velocity;
The Flow Field Distribution of pot bottom makes that impurity is easy to just enter the valve pneumatic positioner along pipeline, thereby causes positioning work piece to stop up.
In the utility model, analyze data as can be known by flow field characteristic, the flow field velocity at most positions is zero in the compressed air cylinder, only has High Speed Flow Field at turnover interface tube place and scavenging conduit jointing, even therefore there is certain impurity in the bottom, also be difficult to take out of by air-flow.When system carried out the purging action, impurity can be discharged by High Speed Flow Field soon simultaneously, improved to purge efficient.
The above only is embodiment of the present utility model; be not so limit claim of the present utility model; every equivalent structure transformation that utilizes the utility model specification and accompanying drawing content to be done; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present utility model.
Claims (7)
1. nuclear power station pressurized air can system, comprise compressed air cylinder (1), this compressed air cylinder (1) is provided with air turnover interface tube and scavenging conduit interface, it is characterized in that, described air turnover interface tube is located on the sidewall of described compressed air cylinder (1), and described scavenging conduit interface is located at the bottom of described compressed air cylinder (1).
2. a kind of nuclear power station pressurized air can system according to claim 1 is characterized in that, described pressurized air turnover interface tube is located at the sidewall middle part of described compressed air cylinder (1).
3. a kind of nuclear power station pressurized air can system according to claim 1 is characterized in that, described scavenging conduit interface is located at the bottom centre place of described compressed air cylinder (1).
4. a kind of nuclear power station pressurized air can system according to claim 1 is characterized in that, described air turnover interface tube place is connected with an air turnover pipe (3), and described scavenging conduit jointing is connected with a scavenging conduit (2).
5. a kind of nuclear power station pressurized air can system according to claim 4 is characterized in that atmospheric dump valve (4) is installed on the steam tube (5), and described atmospheric dump valve (4) is pneumatic atmospheric dump valve.
6. a kind of nuclear power station pressurized air can system according to claim 4 is characterized in that atmospheric dump valve (4) is installed on the steam tube (5), and described atmospheric dump valve (4) comprises a pneumatic positioner.
7. a kind of nuclear power station pressurized air can system according to claim 4 is characterized in that, described air turnover pipe (3) is connected with compressed air system (6) with atmospheric dump valve (4) respectively by two interfaces provided thereon; The output terminal of described compressed air system (6) is equipped with stop valve (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205678456U CN201954251U (en) | 2010-10-14 | 2010-10-14 | Nuclear power station compressed air vessel system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205678456U CN201954251U (en) | 2010-10-14 | 2010-10-14 | Nuclear power station compressed air vessel system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201954251U true CN201954251U (en) | 2011-08-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205678456U Expired - Lifetime CN201954251U (en) | 2010-10-14 | 2010-10-14 | Nuclear power station compressed air vessel system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201954251U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105945014A (en) * | 2016-06-28 | 2016-09-21 | 西安热工研究院有限公司 | Steam blowing system and method for main steam pipeline of nuclear power plant |
-
2010
- 2010-10-14 CN CN2010205678456U patent/CN201954251U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105945014A (en) * | 2016-06-28 | 2016-09-21 | 西安热工研究院有限公司 | Steam blowing system and method for main steam pipeline of nuclear power plant |
| CN105945014B (en) * | 2016-06-28 | 2018-02-16 | 西安热工研究院有限公司 | A kind of system and method for nuclear power station main steam line steam blowing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110831 |