CN205714300U - A kind of system utilizing non-core steam to carry out steam turbine red switch - Google Patents
A kind of system utilizing non-core steam to carry out steam turbine red switch Download PDFInfo
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- CN205714300U CN205714300U CN201620666578.5U CN201620666578U CN205714300U CN 205714300 U CN205714300 U CN 205714300U CN 201620666578 U CN201620666578 U CN 201620666578U CN 205714300 U CN205714300 U CN 205714300U
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Abstract
The utility model discloses a kind of system utilizing non-core steam to carry out steam turbine red switch, including feed pump outlet isolating door, high-pressure heater shunt valve, evaporimeter, main inlet throttle-stop valve, external steam are filled with valve group and pressure vessel；The utility model utilizes main pump (main core blower fan) to rotate the heat producing and external steam is heated to the time shorter (relative to heating the water to rolling parameter) that the steam of rolling parameter needs, it is greatly shortened the red switch time, reduce the test run duration；If external steam pressure is more than minimum pressure needed for red switch, then external steam can feed continuously, utilize main pump (main core blower fan) rotation generation heat to heat steam further and reach red switch requirement, the steam so meeting rolling parameter also just can be with sustainable supply, thus ensure steam turbine continuous service after constant speed, complete major part test under constant velocity state for the steam turbine, reduce nuclear power station when accounting for of conventional island test after charging, thus decrease the nuclear power generating sets test run duration.
Description
Technical field:
The utility model relates to technical field of nuclear power, be specifically related to a kind of utilize that non-core steam carries out steam turbine red switch be
System.
Background technology:
Before current compressed water reactor nuclear power stands in charging, utilize the heat that main pump spin friction produces, for a long time can be by two
The steam that loop produces is heated to rolling parameter, but due to thermal Finite produced by main pump, water vapor latent heat is very big, therefore produces
Raw steaming time is very long, vapour amount little, the consumption of steam when red switch, and steam parameter quickly declines, it is impossible to maintain steam turbine
The constant speed of long period is run, it is impossible to complete the major part test after steam turbine constant speed；
HTGR Nuclear Power Plant main core blower fan rotates the heat producing and just cannot be heated to meet by secondary circuit water at all
The steam of rolling parameter, can't carry out steam turbine red switch test before charging.
Utility model content:
The purpose of this utility model is do not have enough steam to carry out steam turbine punching before charging for current nuclear power station
Turn, complete the problem that steam turbine is tested in the case of constant speed, provide a kind of utilize that non-core steam carries out steam turbine red switch be
System.
For reaching above-mentioned purpose, the utility model adopts the following technical scheme that and realizes:
A kind of system utilizing non-core steam to carry out steam turbine red switch, including feed pump outlet isolating door, high-pressure heater
Shunt valve, evaporimeter, external steam are filled with valve group and pressure vessel, wherein,
The outlet of feed pump outlet isolating door is connected on the entrance of high-pressure heater shunt valve, exports isolating door at feed pump
After feedwater piping on perforate install external steam be filled with valve group；
The outlet of pressure vessel is connected on the first entrance of evaporimeter, and the first outlet of evaporimeter is connected on entering of pressure vessel
Mouthful, the outlet of high-pressure heater shunt valve is connected on the second entrance of evaporimeter；
Working medium in pressure vessel is driven by the Power Drive Unit in pressure vessel, comes for pressurized-water reactor nuclear power plant
Saying, its working medium is demineralized water, and driving means is main pump, and for HTGR Nuclear Power Plant, its working medium is helium, drives dress
It is set to Helium fan；
Evaporimeter is shell-and-tube heat exchanger, and shell-side is the primary side of evaporimeter, and tube side is the secondary side of evaporimeter, evaporimeter
First entrance access evaporimeter primary side entrance, evaporimeter first outlet for evaporimeter primary side outlet, evaporimeter
Second entrance access evaporimeter secondary side entrance, evaporimeter secondary side outlet be connected on evaporimeter second outlet；With steaming
Sending out the system that is connected of device primary side becomes primary Ioops, and the system being connected with evaporimeter secondary side becomes secondary circuit.
The utility model is further improved by, and external steam is filled with valve group and includes being sequentially connected with against filling vapour direction
Non-return flap, regulation door and cut-off gate.
The utility model is further improved by, and also includes main inlet throttle-stop valve, and wherein, the entrance of main inlet throttle-stop valve is connected on evaporimeter
Second outlet.
The utility model is further improved by, before high-pressure heater shunt valve, the secondary side of evaporimeter, main inlet throttle-stop valve all
Having hydrophobic valve, these valves are referred to as secondary circuit hydrophobic valve.
Compared with prior art, the utility model has the advantage that
A kind of system utilizing non-core steam to carry out steam turbine red switch that the utility model provides, has following significantly excellent
Point:
1st, main pump (main core blower fan) is utilized to rotate the steam needs that external steam is heated to rolling parameter by the heat producing
Time shorter (relative to heating the water to rolling parameter), be greatly shortened the red switch time, reduce the test run duration；
If 2 external steam pressure are more than minimum pressure needed for red switch, then external steam can feed continuously,
Utilize main pump (main core blower fan) rotation generation heat to heat steam further and reach red switch requirement, so meet the steaming of rolling parameter
Vapour also just with sustainable supply, thus can ensure steam turbine continuous service after constant speed, completes big under constant velocity state of steam turbine
Part test, reduces nuclear power station when accounting for of conventional island test after charging, thus decreases the nuclear power generating sets test run duration.
3rd, the problem that HTGR nuclear power generating sets cannot carry out red switch test before charging is solved.
4th, this system mainly make use of the original equipment of nuclear power station, and the extra equipment increasing is less, and cost of investment is few.
Brief description:
Fig. 1 is the structured flowchart of a kind of system utilizing non-core steam to carry out steam turbine red switch of the utility model.
Detailed description of the invention:
Below in conjunction with accompanying drawing, the utility model is made further instructions.
As it is shown in figure 1, a kind of system utilizing non-core steam to carry out steam turbine red switch that the utility model provides, including to
Exit of pump isolating door the 1st, high-pressure heater shunt valve the 2nd, evaporimeter the 3rd, main inlet throttle-stop valve the 4th, external steam is filled with valve group 5 and pressure holds
Device 6, wherein, the outlet of feed pump outlet isolating door 1 is connected on the entrance of high-pressure heater shunt valve 2, in feed pump outlet isolation
Perforate on feedwater piping after door 1 is installed external steam and is filled with valve group 5；The outlet of pressure vessel 6 is connected on the first of evaporimeter 3
Entrance, the first outlet of evaporimeter 3 is connected on the entrance of pressure vessel, and the outlet of high-pressure heater shunt valve 2 is connected on evaporimeter 3
Second entrance；Working medium in pressure vessel 6 is driven by the Power Drive Unit in pressure vessel 6, for pressurized-water reactor nuclear power plant
For, its working medium is demineralized water, and driving means is main pump, and for HTGR Nuclear Power Plant, its working medium is helium, drives
Device is Helium fan；Evaporimeter 3 is shell-and-tube heat exchanger, and shell-side is the primary side of evaporimeter 3, and tube side is the two of evaporimeter 3
Secondary side, the first entrance of evaporimeter 3 accesses the primary side entrance of evaporimeter 3, that the first outlet of evaporimeter 3 is evaporimeter 3
Secondary side outlet, the second entrance of evaporimeter 3 accesses the secondary side entrance of evaporimeter 3, and the secondary side outlet of evaporimeter 3 is connected on evaporation
Second outlet of device 3；The system being connected with evaporimeter primary side becomes primary Ioops, and the system being connected with evaporimeter secondary side becomes
For secondary circuit, the entrance of main inlet throttle-stop valve 4 is connected on the second outlet of evaporimeter 3.
Utilize the method for a kind of system utilizing non-core steam to carry out steam turbine red switch that the utility model provides, including as
Lower step:
1) closing feed pump outlet isolating door the 1st, main inlet throttle-stop valve 4 tight, secondary circuit hydrophobic valve is fully open；
2) by external steam, two that external steam is filled with that valve group 5 is filled with high-pressure heater shunt valve the 2nd, evaporimeter 3
Secondary side is until before main inlet throttle-stop valve 4, carry out heating coil to secondary circuit during steam-charged；Wherein, external steam is starting trouble
Steam, heating boiler steam or adjacent machine auxiliary steam, if the pressure of external steam is higher than the minimal pressure needed for steam turbine red switch
Power, then red switch can be carried out continuously；If the pressure of external steam is less than the minimum pressure needed for steam turbine red switch, then secondary circuit
Needing accumulation of energy to boost, red switch can only discontinuously be carried out；
3) in being filled with steam course by external steam be filled with in valve group 5 regulation gate control steam be filled with speed
, there is not water slug, and ensure the temperature rise speed of evaporimeter 3 less than its temperature limit in degree, it is ensured that steam is filled with gently；
4) after heating coil completes, close secondary circuit hydrophobic valve, secondary circuit pressure, temperature will slowly rise subsequently, heat up,
In boost process, it is ensured that intensification, the rate of rise of evaporimeter 3 are less than its temperature, pressure limit；
5) start the Power Drive Unit in pressure vessel 6, rotated by driving means and make primary Ioops working medium circulation stream
Moving up, primary Ioops working medium absorbs the heat of secondary circuit steam, and temperature slowly raises, meanwhile, and driving means frictional heat, enters one
The working medium of step heating primary Ioops；
6) with the lifting of secondary circuit pressure, temperature, after secondary circuit steam pressure is equal to external steam pressure, outside
Steam will be unable to be re-filled with secondary circuit；
7) primary Ioops working medium produces under the heating of heat in evaporimeter 3 Power Drive Unit spin friction, and temperature, pressure enter one
Step raises, and transfers heat to secondary circuit simultaneously, heats the steam of secondary circuit further so that secondary circuit steam pressure, temperature
Raising further, after secondary circuit steam pressure is higher than external steam pressure, the non-return flap that external steam is filled with in valve group 5 will
It is automatically switched off；
8) after vapor (steam) temperature and pressure meet steam turbine red switch requirement in secondary circuit, steam turbine red switch is carried out；
9) during steam turbine red switch, secondary circuit pressure reduces, when secondary circuit pressure is less than external steam pressure, outward
The non-return flap that portion's steam is filled with in valve group (8) would automatically turn on, and external steam is filled with in secondary circuit.
Below as a example by certain nuclear power generating sets utilizes non-core steam to carry out steam turbine red switch, the concrete real of this utility model is described
Execute mode.
The available outside vapour source of this unit includes 1, and can to produce 42t/h parameter be 1.25MPa, 193 DEG C of steam
Electric boiler and can produce the coal-burning boiler 5 that 10t/h parameter is 1.25MPa, 193 DEG C of steam, total steam production is 92t/h.Main
The power of pump (main core blower fan) is 4500KW.Steam turbine capacity is 200MW.
Steam turbine red switch needs 1.25MPa, the steam 21t/h of 260 DEG C.1.25MPa, the enthalpy of 260 DEG C of steam are 2965kj/
Kg, 1.25MPa, the enthalpy of 193 DEG C of steam are 2792.7kj/kg, by 21t/h steam, from 1.25MPa, 193 DEG C be warmed up to
1.25MPa, 260 DEG C of heats needing 1005.1KW, this heat is less than main pump (main core blower fan) power, therefore adopts in this way
Red switch can persistently be carried out.
1) feed pump outlet portal is closed tight；
2) it is followed by interim three-way pipe at feed pump outlet valve, and installation is filled steam valve door group temporarily and (included isolating valve, regulation
Valve, non-return valve)；
3) external steam (starting trouble, heating boiler, adjacent machine auxiliary steam etc.) is utilized to send out to high water-adding system, steam
Raw device secondary circuit, main steam system fill steam, during filling vapour, carry out the heating coil before red switch, warming-up work simultaneously；
4) flow that external steam is filled with secondary circuit is adjusted to about 25t/, when secondary circuit, primary Ioops temperature close to
After external steam temperature, start main pump (main core blower fan), utilize one loop of nuclear power station main pump (main core blower fan) to rotate the heat producing
Amount is heated to secondary circuit steam by evaporimeter, makes vapor (steam) temperature in system, pressure raise further, reaches steam turbine red switch ginseng
Number requires, carries out steam turbine red switch.
Claims (4)
1. one kind utilizes the system that non-core steam carries out steam turbine red switch, it is characterised in that include feed pump outlet isolating door
(1), high-pressure heater shunt valve (2), evaporimeter (3), external steam are filled with valve group (5) and pressure vessel (6), wherein,
The outlet of feed pump outlet isolating door (1) is connected on the entrance of high-pressure heater shunt valve (2), exports isolating door at feed pump
(1) perforate on the feedwater piping after is installed external steam and is filled with valve group (5)；
The outlet of pressure vessel (6) is connected on the first entrance of evaporimeter (3), and the first outlet of evaporimeter (3) is connected on pressure vessel
Entrance, the outlet of high-pressure heater shunt valve (2) is connected on the second entrance of evaporimeter (3)；
Working medium in pressure vessel (6) is driven by the Power Drive Unit in pressure vessel (6), comes for pressurized-water reactor nuclear power plant
Saying, its working medium is demineralized water, and driving means is main pump, and for HTGR Nuclear Power Plant, its working medium is helium, drives dress
It is set to Helium fan；
Evaporimeter (3) is shell-and-tube heat exchanger, and shell-side is the primary side of evaporimeter (3), and tube side is the secondary side of evaporimeter (3),
First entrance of evaporimeter (3) accesses the primary side entrance of evaporimeter (3), and the first outlet of evaporimeter (3) is evaporimeter (3)
Primary side exports, and the second entrance of evaporimeter (3) accesses the secondary side entrance of evaporimeter (3), the secondary side outlet of evaporimeter (3)
It is connected on the second outlet of evaporimeter (3)；The system being connected with evaporimeter primary side becomes primary Ioops, with evaporimeter secondary side even
The system connecing becomes secondary circuit.
2. a kind of system utilizing non-core steam to carry out steam turbine red switch according to claim 1, it is characterised in that outside
Steam is filled with valve group (5) and includes against filling the non-return flap, regulation door that vapour direction is sequentially connected with and cut-off gate.
3. a kind of system utilizing non-core steam to carry out steam turbine red switch according to claim 1, it is characterised in that also wrap
Including main inlet throttle-stop valve (4), wherein, the entrance of main inlet throttle-stop valve (4) is connected on the second outlet of evaporimeter (3).
4. a kind of system utilizing non-core steam to carry out steam turbine red switch according to claim 1, it is characterised in that high pressure
Heater by-pass pipe (2), the secondary side of evaporimeter (3), main inlet throttle-stop valve (4) is front all hydrophobic valve, and these valves are referred to as two times
Road hydrophobic valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620666578.5U CN205714300U (en) | 2016-06-28 | 2016-06-28 | A kind of system utilizing non-core steam to carry out steam turbine red switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620666578.5U CN205714300U (en) | 2016-06-28 | 2016-06-28 | A kind of system utilizing non-core steam to carry out steam turbine red switch |
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| Publication Number | Publication Date |
|---|---|
| CN205714300U true CN205714300U (en) | 2016-11-23 |
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ID=57317455
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| CN201620666578.5U Active CN205714300U (en) | 2016-06-28 | 2016-06-28 | A kind of system utilizing non-core steam to carry out steam turbine red switch |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105937413A (en) * | 2016-06-28 | 2016-09-14 | 西安热工研究院有限公司 | System and method for carrying out steam turbine running by virtue of non-nuclear steam |
| CN106782720A (en) * | 2017-02-28 | 2017-05-31 | 西安热工研究院有限公司 | A kind of utilization auxiliary steam heating and the system and method for cooling start and stop heaping equipment |
| CN108278586A (en) * | 2018-03-14 | 2018-07-13 | 西安热工研究院有限公司 | A kind of system and method for HTGR Nuclear Power Plant primary Ioops heating and dehumidification |
-
2016
- 2016-06-28 CN CN201620666578.5U patent/CN205714300U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105937413A (en) * | 2016-06-28 | 2016-09-14 | 西安热工研究院有限公司 | System and method for carrying out steam turbine running by virtue of non-nuclear steam |
| CN105937413B (en) * | 2016-06-28 | 2017-10-03 | 西安热工研究院有限公司 | A kind of system and method that steam turbine red switch is carried out using non-core steam |
| CN106782720A (en) * | 2017-02-28 | 2017-05-31 | 西安热工研究院有限公司 | A kind of utilization auxiliary steam heating and the system and method for cooling start and stop heaping equipment |
| CN108278586A (en) * | 2018-03-14 | 2018-07-13 | 西安热工研究院有限公司 | A kind of system and method for HTGR Nuclear Power Plant primary Ioops heating and dehumidification |
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