CN108167036A - A kind of system and method for nuclear power generating sets vapor self - Google Patents
A kind of system and method for nuclear power generating sets vapor self Download PDFInfo
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- CN108167036A CN108167036A CN201810078183.7A CN201810078183A CN108167036A CN 108167036 A CN108167036 A CN 108167036A CN 201810078183 A CN201810078183 A CN 201810078183A CN 108167036 A CN108167036 A CN 108167036A
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- Prior art keywords
- steam
- auxiliary vapour
- entrance
- auxiliary
- header
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
Abstract
The invention discloses a kind of system and method for nuclear power generating sets vapor self, which includes auxiliary vapour header, steam turbine, condenser, bypass valve, evaporator, water supply system, external steam-supplying system, auxiliary vapour user and auxiliary vapour valve group.This method includes the following steps：1) before reactor start-up, from external steam-supplying system to auxiliary vapour header steam supply；2) after reactor start-up and reactor export generate steam, steam is controlled by bypassing into auxiliary vapour header by the regulating valve in auxiliary vapour valve group, external steam-supplying system is reduced simultaneously to auxiliary vapour header evaporation capacity for engine, until the steam supply of external steam-supplying system is cut off completely；3) after steam turbine on-load the steam supply from the bypass duct before bypass valve to auxiliary vapour header is gradually cut off from the steam extraction of steam turbine to auxiliary vapour header steam supply；4) after steam turbine tripping, restore the steam supply from bypass to auxiliary vapour header.
Description
Technical field
The invention belongs to technical field of nuclear power, and in particular to a kind of system and method for nuclear power generating sets vapor self.
Background technology
The main vapour source of HTGR Nuclear Power Plant auxiliary vapour at present is extracted steam from turbine, and standby steam source is that electric boiler generates
Steam.
System is primarily present following deficiency at present：
1) before the non-on-load of steam turbine, steam extraction can not obtain, and evaporator feedwater can only be by electric boiler to deoxygenation
Device steam supply heats, and electric boiler needs long-play, costly, heating effect is poor and unstable；
2) unit is in initial start stage, and a large amount of steam to condenser, are discharged into the steam of condenser by the row of bypass, heat without
Method is utilized, and is the waste of energy；
3) steam is discharged into condenser, improves the temperature of condensation water, reduces the efficiency of steam turbine；
4) the excessively high operation that can influence precision processing of the temperature of condensation water；
5) steam enters after condenser becomes condensation water, also to squeeze into oxygen-eliminating device using condensate pump, increase condensation water
The wasted work of pump；
6) when shutting down not shutdown operating condition, after halt turbines, steam extraction all loses, and auxiliary vapour header loses vapour
Source needs electric boiler to restore steam supply, therefore in unit normal operation, and electric boiler is needed in hot stand-by duty, is energy
Waste；
7) even if electric boiler is in hot stand-by duty, but can be needed at least effectively to auxiliary vapour header steam supply from hot standby use
15 minutes or more, this period of vapour source is lost in auxiliary vapour header, oxygen-eliminating device loses heating, and axle envelope loses vapour source, and unit is pacified
Row for the national games and further startup impact.
Invention content
It is an object of the invention to be directed to the deficiency of current machine set system, a kind of system of nuclear power generating sets vapor self is provided
And method.
In order to achieve the above objectives, the present invention adopts the following technical scheme that realize：
A kind of system of nuclear power generating sets vapor self, including auxiliary vapour header, steam turbine, bypass valve, external steam-supplying system,
Auxiliary vapour user and auxiliary vapour valve group；Wherein,
On reject steam pipeline before bypass valve connecting pipe to auxiliary vapour valve group entrance, auxiliary vapour valve group
Outlet connects the first entrance of auxiliary vapour header, and the second entrance of auxiliary vapour header is connected on the first outlet of steam turbine, and the of auxiliary vapour header
Three entrances are connected on the outlet of external steam-supplying system, and the outlet of auxiliary vapour header is connected on the entrance of auxiliary vapour user.
Further improve of the invention is, further includes condenser, evaporator and water supply system；Wherein,
The outlet of evaporator is divided into two strands, and first strand of entrance for being connected on steam turbine, second strand is connected on entering for bypass valve
Mouthful；The second outlet of steam turbine is connected on the first entrance of condenser；The outlet of bypass valve is connected on the second entrance of condenser；
The outlet of condenser is connected on the entrance of water supply system；The outlet of water supply system is connected on the entrance of evaporator.
Further improve of the invention is that auxiliary vapour valve group is cut for bypass valve preceding pipeline to auxiliary vapour header entrance
Only door and adjusting door.
Further improve of the invention is that auxiliary vapour user includes oxygen-eliminating device heating with vapour user and turbine shaft seal vapour
User.
Further improve of the invention is that the first outlet of steam turbine is the steam extraction of steam turbine.
A kind of method of nuclear power generating sets vapor self, includes the following steps：
1) before reactor start-up, from external steam-supplying system to auxiliary vapour header steam supply, auxiliary vapour user takes vapour from auxiliary vapour header；
2) after reactor start-up and reactor export generate steam, steam is discharged into condenser by bypass valve, this
When its upstream pressure adjusted higher than auxiliary vapour header pressure, and pass through the regulating valve in auxiliary vapour valve group and control by bypass valve
Steam reduces external steam-supplying system to auxiliary vapour header evaporation capacity for engine by bypassing into auxiliary vapour header, until by external steam supply system
The steam supply of system is cut off completely；
3) after steam turbine on-load, after extraction pressure is higher than the pressure of auxiliary vapour header, from the steam extraction of steam turbine to auxiliary
Vapour header steam supply gradually cuts off the steam supply from the bypass duct before bypass valve to auxiliary vapour header steam supply；
4) after steam turbine tripping, the steam extraction of steam turbine is lost, restore at this time from the bypass duct before bypass valve to
The steam supply of auxiliary vapour header steam supply.
The present invention has the advantage that：
The present invention provides a kind of system and method for nuclear power generating sets vapor self and system usually used at present has been compared
Following several respects clear advantage：
1) heat of partial bypass steam has directly been recycled, there is energy-saving effect；
2) using reject steam, electric boiler can be out of service after auxiliary vapour header steam supply, has energy-efficient effect；
3) in unit normal operation, electric boiler can switch to cold standby state from hot stand-by duty, have energy-efficient effect
Fruit；
4) after steam turbine tripping, auxiliary vapour header can restore steam supply within a very short time, be conducive to the peace of nuclear power generating sets
Entirely, stable operation；
5) temperature of startup stage condensation water is reduced, improves the efficiency of steam turbine；
6) temperature of startup stage condensation water is reduced, it is advantageous to the safe operation of precision processing system；
7) reduce the output of solidifying pump, there is energy-saving effect.
Description of the drawings
Fig. 1 is a kind of structure diagram of the system of nuclear power generating sets vapor self of the present invention.
In figure：The auxiliary vapour headers of 1-, 2- steam turbines, 3- condensers, 4- bypass valves, 5- evaporators, 6- water supply systems, 7-
External steam-supplying system, the auxiliary vapour users of 8-, the auxiliary vapour valve groups of 9-.
Specific embodiment
The present invention is further described in detail below in conjunction with attached drawing.
As shown in Figure 1, a kind of system of nuclear power generating sets vapor self provided by the invention, including auxiliary vapour header 1, steam turbine 2,
Bypass valve 4, external steam-supplying system 7, auxiliary vapour user 8, auxiliary vapour valve group 9；Wherein, the bypass before bypass valve 4 is steamed
For connecting pipe to the entrance of auxiliary vapour valve group 9, the outlet of auxiliary vapour valve group 9 connects the first entrance of auxiliary vapour header 1, auxiliary on steam pipe road
The second entrance of vapour header 1 is connected on the first outlet of steam turbine 2, and the third entrance of auxiliary vapour header 1 is connected on external steam-supplying system 7
Outlet, the outlet of auxiliary vapour header 1 is connected on the entrance of auxiliary vapour user 8.
In addition, the invention also includes condenser 3, evaporator 5 and water supply systems 6；Wherein, the outlet of evaporator 5 is divided into two
Stock, first strand of entrance for being connected on steam turbine 2, second strand of entrance for being connected on bypass valve 4；The second outlet of steam turbine 2 is connected on
The first entrance of condenser 3；The outlet of bypass valve 4 is connected on the second entrance of condenser 3；The outlet of condenser 3 be connected on to
The entrance of water system 6；The outlet of water supply system 6 is connected on the entrance of evaporator 5.
Wherein, auxiliary vapour valve group 9 is the cut-off gate of 4 preceding pipeline of bypass valve to auxiliary 1 entrance of vapour header and adjusting door.It is auxiliary
Vapour user 8, which includes the nuclear power stations such as oxygen-eliminating device heating vapour, turbine shaft seal vapour, to be needed to use all users of vapour.Steam turbine 2
Second outlet is the steam extraction of steam turbine.
A kind of method of nuclear power generating sets vapor self provided by the invention, includes the following steps：
1) before reactor start-up, from external steam-supplying system 7 to auxiliary 1 steam supply of vapour header, auxiliary vapour user 8 is from auxiliary vapour header 1
Take vapour；
2) after reactor start-up and reactor export generate steam, steam is discharged into condenser 3 by bypass valve 4,
Its upstream pressure is adjusted higher than auxiliary 1 pressure of vapour header by bypass valve 4 at this time, and passes through the adjusting in auxiliary vapour valve group 9
Valve controls steam by bypassing into auxiliary vapour header 1, while reduces external steam-supplying system 7 to auxiliary 1 evaporation capacity for engine of vapour header, until will be outer
The steam supply of portion's steam-supplying system 7 is cut off completely；
3) after 2 on-load of steam turbine, extraction pressure higher than auxiliary vapour header 1 pressure after, from steam turbine 2 steam extraction to
Auxiliary 1 steam supply of vapour header gradually cuts off the steam supply from the bypass duct before bypass valve 4 to auxiliary 1 steam supply of vapour header；
4) after the tripping of steam turbine 2, the steam extraction of steam turbine 2 is lost, and restores at this time by the bypass duct before bypass valve 4
To the steam supply of auxiliary 1 steam supply of vapour header.
Claims (6)
1. a kind of system of nuclear power generating sets vapor self, which is characterized in that adjusted including auxiliary vapour header (1), steam turbine (2), bypass
Valve (4), external steam-supplying system (7), auxiliary vapour user (8) and auxiliary vapour valve group (9)；Wherein,
Connecting pipe is to the entrance of auxiliary vapour valve group (9), auxiliary vapour valve group on reject steam pipeline before bypass valve (4)
(9) outlet connects the first entrance of auxiliary vapour header (1), and the second entrance of auxiliary vapour header (1) is connected on the first of steam turbine (2) and goes out
Mouthful, the third entrance of auxiliary vapour header (1) is connected on the outlet of external steam-supplying system (7), and the outlet of auxiliary vapour header (1) is connected on auxiliary vapour and uses
The entrance at family (8).
2. a kind of system of nuclear power generating sets vapor self according to claim 1, which is characterized in that further include condenser (3),
Evaporator (5) and water supply system (6)；Wherein,
The outlet of evaporator (5) is divided into two strands, and first strand of entrance for being connected on steam turbine (2), second strand is connected on bypass valve (4)
Entrance；The second outlet of steam turbine (2) is connected on the first entrance of condenser (3)；The outlet of bypass valve (4) is connected on condensing
The second entrance of device (3)；The outlet of condenser (3) is connected on the entrance of water supply system (6)；The outlet of water supply system (6) is connected on steaming
Send out the entrance of device (5).
3. the system of a kind of nuclear power generating sets vapor self according to claim 1, which is characterized in that auxiliary vapour valve group (9) is
Bypass valve (4) preceding pipeline to auxiliary vapour header (1) entrance cut-off gate and adjust door.
4. the system of a kind of nuclear power generating sets vapor self according to claim 1, which is characterized in that auxiliary vapour user (8) includes
Oxygen-eliminating device heating is with vapour user and turbine shaft seal vapour user.
A kind of 5. system of nuclear power generating sets vapor self according to claim 1, which is characterized in that the first of steam turbine (2)
Export the steam extraction for steam turbine.
A kind of 6. method of nuclear power generating sets vapor self, which is characterized in that this method is based on a kind of nuclear power machine described in claim 2
The system of group vapor self, includes the following steps：
1) before reactor start-up, from external steam-supplying system (7) to auxiliary vapour header (1) steam supply, auxiliary vapour user (8) is from auxiliary vapour header
(1) vapour is taken；
2) after reactor start-up and reactor export generate steam, steam is discharged into condenser (3) by bypass valve (4),
Its upstream pressure is adjusted higher than auxiliary vapour header (1) pressure by bypass valve (4) at this time, and by auxiliary vapour valve group (9)
Regulating valve steam is controlled while to be reduced external steam-supplying system (7) by bypassing into auxiliary vapour header (1) and supplied to auxiliary vapour header (1)
Vapour amount, until the steam supply of external steam-supplying system (7) is cut off completely；
3) after steam turbine (2) on-load, after extraction pressure is higher than the pressure of auxiliary vapour header (1), by the steam extraction of steam turbine (2)
To auxiliary vapour header (1) steam supply, the steam supply from the bypass duct before bypass valve (4) to auxiliary vapour header (1) steam supply is gradually cut off；
4) after steam turbine (2) tripping, the steam extraction of steam turbine (2) is lost, and restores at this time by the shunt valve before bypass valve (4)
Road is to the steam supply of auxiliary vapour header (1) steam supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810078183.7A CN108167036A (en) | 2018-01-26 | 2018-01-26 | A kind of system and method for nuclear power generating sets vapor self |
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| CN201810078183.7A CN108167036A (en) | 2018-01-26 | 2018-01-26 | A kind of system and method for nuclear power generating sets vapor self |
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ID=62516128
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110131003A (en) * | 2019-06-10 | 2019-08-16 | 西安热工研究院有限公司 | A kind of system and method for high temperature gas cooled reactor nuclear power unit secondary circuit start and stop |
| CN111536498A (en) * | 2020-06-11 | 2020-08-14 | 西安热工研究院有限公司 | Rapid starting control system and method for electric boiler of nuclear power plant |
| CN113266438A (en) * | 2021-05-18 | 2021-08-17 | 西安热工研究院有限公司 | Operation control system and method based on high-temperature gas cooled reactor |
| CN114412597A (en) * | 2022-01-21 | 2022-04-29 | 山东核电有限公司 | Multi-steam-source auxiliary steam system of nuclear power unit and control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110131003A (en) * | 2019-06-10 | 2019-08-16 | 西安热工研究院有限公司 | A kind of system and method for high temperature gas cooled reactor nuclear power unit secondary circuit start and stop |
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| CN111536498B (en) * | 2020-06-11 | 2021-11-09 | 西安热工研究院有限公司 | Rapid starting control system and method for electric boiler of nuclear power plant |
| CN113266438A (en) * | 2021-05-18 | 2021-08-17 | 西安热工研究院有限公司 | Operation control system and method based on high-temperature gas cooled reactor |
| CN114412597A (en) * | 2022-01-21 | 2022-04-29 | 山东核电有限公司 | Multi-steam-source auxiliary steam system of nuclear power unit and control method thereof |
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