CN107664045A - A kind of HTGR Turbine Steam gland sealing steam supply system and method - Google Patents
A kind of HTGR Turbine Steam gland sealing steam supply system and method Download PDFInfo
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- CN107664045A CN107664045A CN201710813472.2A CN201710813472A CN107664045A CN 107664045 A CN107664045 A CN 107664045A CN 201710813472 A CN201710813472 A CN 201710813472A CN 107664045 A CN107664045 A CN 107664045A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/02—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type
- F01D11/04—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type using sealing fluid, e.g. steam
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- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The invention discloses a kind of HTGR back pressure turbine gland sealing steam supply system and method,The outlet of main steam system is divided into two-way,Wherein it is connected all the way with the entrance of back pressure turbine,Another way is connected with the entrance of main steam pressure-reducing valve,The outlet of main steam pressure-reducing valve and the outlet of back pressure turbine after pipeline and pipe by being divided into two-way,Wherein,It is connected all the way with the entrance of high pressure cylinder packing and the entrance of direct-contact desuperheater,Another way is connected with oxygen-eliminating device,The outlet of condensate system is connected with the entrance of direct-contact desuperheater,The outlet of the direct-contact desuperheater system and method that is connected with the entrance of low pressure (LP) cylinder packing and the entrance of condenser can make the high pressure cylinder gland sealing steam supply temperature of steam turbine and high pressure cylinder metal temperature match,Two kinds of vapour source handoff procedures are avoided to be disturbed to caused by unit,Avoid aid in electric boiler longtime running caused by steam supply gland steam quality decline to the problem of,And better economy.
Description
Technical field
The invention belongs to technical field of nuclear power, is related to a kind of HTGR Turbine Steam gland sealing steam supply system and method.
Background technology
Turbine steam seal system is used for sealing the gap between steam turbine sound part, is the important composition portion of steam turbine
Part.At present, turbine steam seal problem has turned into an important factor for influence Turbine Safety and economy.Mainly there are two aspects former
Cause：(1) there is problem in packing design structure in itself so that labyrinth casing easily damages during steam turbine longtime running, causes low pressure (LP) cylinder
Packing is poorly sealed and causes vacuum to reduce, and steam consumption increase, turbine efficiency reduces, and causes steam turbine sound portion under serious conditions
Part friction, bearing vibration value rise, or even the major accidents such as turbine rotor permanent bend are caused, the problem is mainly by vapour
Seal structure is designed improvement to solve；(2) gland sealing steam supply system poor reliability so that gland sealing steam supply pressure and temperature can not
Strictly meet steam turbine operation demand.In the case of steam turbine longtime running, gland sealing steam supply hypertonia will cause steam to leak into axle
Case is held, causes to lubricate oil mixed with water and emulsify, causes oil whip, bearing shell can be caused to burn when serious；When pressure of steam supply is too low,
It can equally cause low pressure (LP) cylinder shaft end gland seal poorly sealed；Steam supply temperature is too high to cause steam turbine bearing temperature to raise, and add
The creep properties of packing metal material, so as to cause packing deformed damaged；Steam supply temperature is too low to cause steam turbine ponding, machine
Difference increase that group is swollen.In view of this, how to improve turbine steam seal reliability becomes an important research topic.It is right at present
The achievement in research of each side is achieved in terms of how improving packing design structure, but with regard to how to improve gland sealing steam supply system reliability
The research of aspect is very few, and gland sealing steam supply parameter is adjusted frequently by accumulating experience in steam turbine actual moving process.
Ball bed modular high temperature gas cooled reactor nuclear power station is current internationally recognized forth generation advanced reactor, 211MW high temperature
HTGR Turbine Steam gland sealing steam supply system flow is illustrated in fig. 1 shown below.According to steam turbine cold conditions, stable state and hot starting, hot start operating mode not
Together, packing vapour source is provided by auxiliary electric boiler vapour system and main steam system respectively.When steam turbine cold conditions or stable state start, come
It is divided into two-way after being decompressed to 0.025-0.031MPa from the adjusted valve of superheated steam (1.6MPa, 350 DEG C) of auxiliary electric boiler：One
Road directly prevents steam from being spilt from cylinder body for high pressure cylinder packing, and another way is by direct-contact desuperheater desuperheat to after 121-177 DEG C
Prevent extraneous air from leaking into cylinder body for low pressure (LP) cylinder packing, the direct-contact desuperheater cooling water source comes from condensate system, steam turbine
During hot or very hot startup, main steam from reactor export (13.9MPa, 576 DEG C) is decompressed to by regulating valve
0.025-0.031MPa, by one-level direct-contact desuperheater desuperheat to being divided into two-way after 300-450 DEG C：High pressure cylinder vapour is directly supplied all the way
Envelope, another way is by two level direct-contact desuperheater desuperheat to supplying low pressure (LP) cylinder packing after 121-177 DEG C.Steam turbine during normal operation,
Gland sealing steam supply main-piping pressure is controlled to be not higher than 0.031MPa by overflow valve, when steam turbine load reaches the 25% of rated load
Afterwards, self sealss are realized come sealing low pressure cylinder packing after load reaches the 50% of rated load by high pressure cylinder gland leak-off, it is auxiliary
Electric boiler vapour system or main steam system is helped to exit.
The design has used two kinds of packing vapour sources in steam turbine cold conditions, stable state and hot different start operating performances, from
And successive step at the beginning of realizing gland sealing steam supply parameter meets unit demand.But at least there is following drawback in the design：(1) according to
Steam turbine Start-up and Adjustment directive/guide (DLT863-2004) provides：Steam turbine start-up course high pressure cylinder gland sealing steam supply temperature Ying Yugao
Cylinder pressure metal temperature matches (the general temperature difference≤85 DEG C), when unit cold conditions and stable state start, aids in electric boiler outlet vapor temperature
Spend constant, it is difficult to the change of Dynamic Matching start-up course high pressure cylinder metal temperature, easily cause gland sealing steam supply temperature drift or
Relatively low phenomenon, has a strong impact on unit safety；(2) unit is hot and during very hot startup, main steam steam supply seal pressure by
13.24MPa is down to 0.025-0.031MPa, can cause substantial amounts of droop loss during this, and economy is poor.Pressure-reducing valve simultaneously
Front and rear higher pressure differential, the flimsy risk of valve inherently be present；(3) electric boiler is aided in be supplied in the case of longtime running
Seal steam quality can be present to be declined to a certain degree, and steam turbine is run reliably and with long-term to affect.
The content of the invention
A kind of the shortcomings that it is an object of the invention to overcome above-mentioned prior art, there is provided HTGR turbine steam seal
Steam-supplying system and method, the system and method can make the high pressure cylinder gland sealing steam supply temperature and high pressure cylinder metal temperature phase of steam turbine
Matching, avoids two kinds of vapour source handoff procedures from being disturbed to caused by unit, avoids steam supply caused by aiding in electric boiler longtime running from sealing
The problem of steam quality drops to, and better economy.
To reach above-mentioned purpose, HTGR Turbine Steam gland sealing steam supply system of the present invention includes main steam system
System, main steam pressure-reducing valve, back pressure turbine, high pressure cylinder packing, direct-contact desuperheater, oxygen-eliminating device, condensate system, low pressure (LP) cylinder vapour
Envelope and condenser；
The outlet of main steam system is divided into two-way, wherein be connected all the way with the entrance of back pressure turbine, another way with
The entrance of main steam pressure-reducing valve is connected, after the outlet of main steam pressure-reducing valve and the outlet of back pressure turbine are by pipeline and pipe
It is divided into two-way, wherein, it is connected all the way with the entrance of high pressure cylinder packing and the entrance of direct-contact desuperheater, another way and oxygen-eliminating device phase
Connection, the outlet of condensate system are connected with the entrance of direct-contact desuperheater, outlet and the low pressure (LP) cylinder packing of direct-contact desuperheater
The entrance of entrance and condenser is connected.
The outlet of back pressure turbine and the outlet of main steam pressure-reducing valve by being divided into two-way after pipeline and pipe, wherein, one
Road is connected through gland sealing steam supply main pipe pressure-reducing valve with the entrance of high pressure cylinder packing and the entrance of direct-contact desuperheater, and another way is through main steaming
Vapour is connected for oxygen-eliminating device regulating valve with oxygen-eliminating device.
The outlet of oxygen-eliminating device is connected through steam feed pump with the entrance of oxygen-eliminating device, back pressure turbine and steam feed pump
It is coaxially arranged.
The adjusted valve in outlet of condensate system is connected with the entrance of direct-contact desuperheater.
It is connected between direct-contact desuperheater and condenser by packing overflow regulating valve.
HTGR turbine steam seal steam supplying method of the present invention comprises the following steps：
When steam turbine starts, the main steam of main steam system output enters back pressure turbine and main steam pressure-reducing valve
In, the exhaust steam pressure and exhaust temperature of back pressure turbine are set according to steam turbine high-pressure cylinder Metal Temperature angle value, makes back pressure type vapour
The exhaust temperature of turbine and the Metal Temperature angle value of steam turbine high-pressure cylinder match, while make main steam after main steam pressure-reducing valve
Pressure is consistent with the exhaust steam pressure of back pressure turbine, steam and main steam the pressure-reducing valve output that back pressure turbine exports
It is divided into two-way after steam convergence, wherein entering all the way in oxygen-eliminating device, another way enters high pressure cylinder packing and direct-contact desuperheater
In, then entered again after direct-contact desuperheater desuperheat in low pressure (LP) cylinder packing and condenser, wherein, direct-contact desuperheater is in desuperheat mistake
The water exported in journey by condensate system is used as the cooling water source of direct-contact desuperheater, steam turbine red switch, grid-connected and on-load work
After work, when steam turbine load reaches more than the 50% of rated load, turbine steam seal realizes automatic-sealed, then closes main steam
System.
The invention has the advantages that：
HTGR back pressure turbine gland sealing steam supply system of the present invention and method are in concrete operations, main steaming
The outlet of vapour system is divided into two-way, wherein be connected all the way with the entrance of back pressure turbine, another way and main steam pressure-reducing valve
Entrance be connected, the outlet of back pressure turbine and the outlet of main steam pressure-reducing valve are divided into two-way after pipeline and pipe, wherein
It is connected all the way with oxygen-eliminating device, another way is connected with direct-contact desuperheater and high pressure cylinder packing, by adjusting back pressure turbine,
The exhaust temperature of back pressure turbine and the Metal Temperature angle value of steam turbine high-pressure cylinder is matched, while use single vapour source, it is real
Existing steam turbine start-up course high pressure cylinder gland sealing steam supply temperature matches with high pressure cylinder metal temperature, drastically increases steam turbine
The security and stability of operation, while avoid prior art from using to being disturbed caused by unit possibility in two kinds of vapour source handoff procedures,
Beneficial to stable operation of unit.The present invention cancels electric boiler steam and supplies sealing system simultaneously, seal steam product when avoiding longtime running
The problem of matter reduces, while oxygen-eliminating device heating vapour source is self-supporting by main steam in the present invention, greatly shortens steam turbine startup
Time, improve the performance driving economy of unit.
Further, back pressure turbine and steam feed pump are coaxially arranged, are lost by a part of main steam pressure drop to drive
Dynamic back pressure turbine, by back pressure steam turbine drive steam feed pump, so as to be removed by steam feed pump come circulating-heating
The feedwater of oxygen device, realize the recycling of energy.
Brief description of the drawings
Fig. 1 is the structural representation of existing steam-supplying system；
Fig. 2 is the structural representation of the present invention.
Wherein, 1 it is main steam system, 2 be main steam reducing valve, 3 be back pressure turbine, 4 is that gland sealing steam supply main pipe subtracts
Pressure valve, 5 be main steam for oxygen-eliminating device regulating valve, 6 be steam feed pump, 7 be oxygen-eliminating device, 8 be condensate system, 9 be regulating valve,
10 it is direct-contact desuperheater, 11 be high pressure cylinder packing, 12 be low pressure (LP) cylinder packing, 13 be packing overflow regulating valve, 14 is condenser.
Embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings：
With reference to figure 1, HTGR Turbine Steam gland sealing steam supply system of the present invention includes main steam system 1, main steaming
Vapour pressure-reducing valve 2, back pressure turbine 3, high pressure cylinder packing 11, direct-contact desuperheater 10, oxygen-eliminating device 7, condensate system 8, low pressure (LP) cylinder
Packing 12 and condenser 14；The outlet of main steam system 1 is divided into two-way, wherein the entrance with back pressure turbine 3 is connected all the way
Logical, another way is connected with the entrance of main steam pressure-reducing valve 2, the outlet of main steam pressure-reducing valve 2 and the outlet of back pressure turbine 3
By being divided into two-way after pipeline and pipe, wherein, it is connected all the way with the entrance of high pressure cylinder packing 11 and the entrance of direct-contact desuperheater 10
Logical, another way is connected with oxygen-eliminating device 7, and the outlet of condensate system 8 is connected with the entrance of direct-contact desuperheater 10, spray desuperheating
The outlet of device 10 is connected with the entrance of low pressure (LP) cylinder packing 12 and the entrance of condenser 14.
The outlet of back pressure turbine 3 and the outlet of main steam pressure-reducing valve 2 by being divided into two-way after pipeline and pipe, wherein,
It is connected all the way through gland sealing steam supply main pipe pressure-reducing valve 4 with the entrance of high pressure cylinder packing 11 and the entrance of direct-contact desuperheater 10, it is another
Road is connected through main steam for oxygen-eliminating device regulating valve 5 with oxygen-eliminating device 7；The outlet of oxygen-eliminating device 7 is through steam feed pump 6 and oxygen-eliminating device 7
Entrance be connected, back pressure turbine 3 and steam feed pump 6 are coaxially arranged；The adjusted valve 9 in outlet of condensate system 8 with
The entrance of direct-contact desuperheater 10 is connected；It is connected between direct-contact desuperheater 10 and condenser 14 by packing overflow regulating valve 13
It is logical；Back pressure turbine 3 is back pressure type back pressure turbine.
HTGR turbine steam seal steam supplying method of the present invention comprises the following steps：
When steam turbine starts, the main steam that main steam system 1 exports enters back pressure turbine 3 and main steam pressure-reducing valve
In 2, the exhaust steam pressure and exhaust temperature of back pressure turbine 3 are set according to steam turbine high-pressure cylinder Metal Temperature angle value, makes back pressure type
The exhaust temperature of steam turbine 3 and the Metal Temperature angle value of steam turbine high-pressure cylinder match, while make main steam through main steam pressure-reducing valve 2
Pressure afterwards is consistent with the exhaust steam pressure of back pressure turbine 3, the steam and main steam pressure-reducing valve that back pressure turbine 3 exports
Be divided into two-way after the steam convergences of 2 outputs, wherein enter all the way in oxygen-eliminating device 7, another way enter high pressure cylinder packing 11 and
In direct-contact desuperheater 10, then entered again after the desuperheat of direct-contact desuperheater 10 in low pressure (LP) cylinder packing 12 and condenser 14, wherein,
The water that direct-contact desuperheater 10 is exported in desuperheating process by condensate system 8 is used as the cooling water source of direct-contact desuperheater 10, vapour
After turbine red switch, grid-connected and loaded-up, when steam turbine load reaches more than the 50% of rated load, turbine steam seal is real
Existing automatic-sealed, then close main steam system 1.
Embodiment one
By taking 211MW HTGRs as an example, main steam total flow is 129600kg/h during unit starting, main in the present invention
The steam supply of vapour system 1 envelope flow is 4000kg/h, and back pressure turbine 3 enters vapour average discharge and is under unit difference start operating performance
3600kg/h, initial steam pressure 13.9MPa, enter vapour mean temperature for 450 DEG C, steam discharge average pressure is 4MPa, and steam discharge is average warm
Spend for 300 DEG C, turbine efficiency 70%, with year generating 7000h, start 100h in unit year and calculate, preresearch estimates can save energy
Amount reaches 15100kWh.
Use after the present invention specific work process for：
1. steam turbine cold start process：
1) reactor starts to start, after the 20% of reactor power raising to full power, steam generator outlet working medium
For saturated vapor (pressure：13.9MPa temperature：336.1℃)；The steam that main steam system 1 exports enters back pressure turbine 3
(exhaust steam pressure：1.6MPa, exhaust temperature：200 DEG C) in, while main steam pressure-reducing valve 2 is thrown automatically and tracks back pressure type steam turbine
The exhaust steam pressure value of machine 3, ensure to export the pressure of steam and the exhaust steam pressure one of back pressure turbine 3 through main steam pressure-reducing valve 2
Cause；Gland sealing steam supply main pipe pressure-reducing valve 4 is thrown automatic and its exhaust steam pressure is set as 0.025-0.031MPa, regulating valve 9 is thrown
Automatically and the temperature of its exit condensate is set as 121-177 DEG C, by condensate system 8 as the cold of direct-contact desuperheater 10
But water source, the steam that gland sealing steam supply main pipe pressure-reducing valve 4 exports enter high pressure cylinder packing 11 and direct-contact desuperheater 10, spray desuperheating
The steam supply low pressure (LP) cylinder packing 12 that device 10 exports；Packing overflow regulating valve 13 from the pressure of motion tracking gland sealing steam supply main pipe, when
After gland sealing steam supply main-piping pressure is more than 0.031MPa, packing overflow regulating valve 13 is opened and so that header vapor pressure maintains
0.031MPa, the steam overflowed are discharged into condenser 14；
2) main steam is thrown automatic and tracks gland sealing steam supply flow after main steam pressure-reducing valve 2 for oxygen-eliminating device regulating valve 5, works as packing
After steam supply flow meets unit demand, remaining main steam is discharged into oxygen-eliminating device 7 for oxygen-eliminating device regulating valve 5 by main steam, together
When by steam feed pump 6 circulating-heating is carried out to oxygen-eliminating device 7, to improve the thermal de-aeration efficiency of oxygen-eliminating device 7；
3) as reactor power raising, steam turbine high-pressure cylinder metal temperature gradually rise, the steam discharge temperature of back pressure turbine 3
The change from motion tracking steam turbine high-pressure cylinder metal temperature is spent, ensures the exhaust temperature of back pressure turbine 3 and steam turbine high-pressure cylinder
Difference between metal temperature is less than or equal to 85 DEG C；After reactor capability rises to the 36% of full power, steam generator outlet
Working medium is superheated steam (pressure：13.9MPa temperature：400 DEG C), the exhaust steam pressure of back pressure turbine 3 is 2MPa, steam discharge temperature
Spend for 270 DEG C.Now the steam parameter of reactor export meets steam turbine red switch demand, and steam turbine starts red switch, grid-connected and band
Load；
4) reactor capability continues to lift up, after reactor capability rises to the 50% of full power, steam generator outlet work
Matter is superheated steam (pressure：13.9MPa temperature：571 DEG C), now the load of steam turbine reaches the 25% of rated load；Back pressure
The exhaust steam pressure of formula steam turbine 3 is 5MPa, and exhaust temperature is 400 DEG C, now leaks vapour by high pressure cylinder packing 11 come sealing low pressure
Cylinder packing 12, and gland sealing steam supply main pipe pressure-reducing valve 4 is gradually turned down, after the load of steam turbine reaches the 50% of rated load,
The sealing system of steam turbine realizes self sealss, and after gland sealing steam supply main pipe 4 contract fully of pressure-reducing valve, main steam pressure-reducing valve 2 slowly closes
Close, back pressure turbine 3 and steam feed pump 6 are out of service immediately.
2. steam turbine warm starting process：
The operating procedure of the cold start of the warm starting and steam turbine of steam turbine is essentially identical, and it is distinguished part and is：
High pressure cylinder Metal Temperature angle value when being started according to steam turbine, when reactor power ascension to full power 20% after, main steam system
The steam of the output of system 1 enters in steam turbine 3, and now the exhaust steam pressure of back pressure turbine 3 is 3MPa, and exhaust temperature is 290 DEG C,
Change of the exhaust temperature of subsequent back pressure turbine 3 from motion tracking steam turbine high-pressure cylinder metal temperature.
3. the hot concrete operations of steam turbine are：
The hot or very hot startup and cold start operating procedure of back pressure turbine 3 are essentially identical, and it distinguishes part
It is：High pressure cylinder Metal Temperature angle value when being started according to steam turbine, after the 36% of reactor power raising to full power, main steam
System 1 starts to put into and is Turbine Steam gland sealing steam supply, and now the exhaust steam pressure of back pressure turbine 3 is 4MPa, and exhaust temperature is
340 DEG C, the change of the exhaust temperature of subsequent back pressure turbine 3 from the high pressure cylinder metal temperature of motion tracking steam turbine 3.
Claims (6)
1. a kind of HTGR Turbine Steam gland sealing steam supply system, it is characterised in that subtract including main steam system (1), main steam
Pressure valve (2), steam turbine (3), high pressure cylinder packing (11), direct-contact desuperheater (10), oxygen-eliminating device (7), condensate system (8), low pressure
Cylinder packing (12) and condenser (14)；
The outlet of main steam system (1) is divided into two-way, wherein the entrance with back pressure turbine (3) is connected all the way, another way
It is connected with the entrance of main steam pressure-reducing valve (2), the outlet and the outlet of back pressure turbine (3) of main steam pressure-reducing valve (2) lead to
Be divided into two-way after piping and pipe, wherein, all the way with the entrance of high pressure cylinder packing (11) and the entrance phase of direct-contact desuperheater (10)
Connection, another way are connected with oxygen-eliminating device (7), and the outlet of condensate system (8) is connected with the entrance of direct-contact desuperheater (10),
The outlet of direct-contact desuperheater (10) is connected with the entrance of low pressure (LP) cylinder packing (12) and the entrance of condenser (14).
2. HTGR Turbine Steam gland sealing steam supply system according to claim 1, it is characterised in that back pressure turbine
(3) outlet of outlet and main steam pressure-reducing valve (2) by being divided into two-way after pipeline and pipe, wherein, it is female through gland sealing steam supply all the way
Pipe pressure-reducing valve (4) is connected with the entrance of high pressure cylinder packing (11) and the entrance of direct-contact desuperheater (10), and another way is through main steam
It is connected for oxygen-eliminating device regulating valve (5) with oxygen-eliminating device (7).
3. HTGR Turbine Steam gland sealing steam supply system according to claim 1, it is characterised in that oxygen-eliminating device (7)
Outlet is connected through steam feed pump (6) with the entrance of oxygen-eliminating device (7), and back pressure turbine (3) and steam feed pump (6) are coaxial
Arrangement.
4. HTGR Turbine Steam gland sealing steam supply system according to claim 1, it is characterised in that condensate system
(8) the adjusted valve in outlet (9) is connected with the entrance of direct-contact desuperheater (10).
5. HTGR Turbine Steam gland sealing steam supply system according to claim 1, it is characterised in that direct-contact desuperheater
(10) it is connected between condenser (14) by packing overflow regulating valve (13).
6. a kind of HTGR turbine steam seal steam supplying method, it is characterised in that based on high temperature gas-cooled described in claim 1
Heap Turbine Steam gland sealing steam supply system, comprises the following steps：
When steam turbine starts, the main steam of main steam system (1) output enters back pressure turbine (3) and main steam pressure-reducing valve
(2) in, the exhaust steam pressure and exhaust temperature of back pressure turbine (3) is set according to steam turbine high-pressure cylinder Metal Temperature angle value, makes the back of the body
The exhaust temperature of pressure type steam turbine (3) and the Metal Temperature angle value of steam turbine high-pressure cylinder match, while make main steam through main steam
Pressure after pressure-reducing valve (2) is consistent with the exhaust steam pressure of back pressure turbine (3), the steam of back pressure turbine (3) output
And it is divided into two-way after the steam convergence of main steam pressure-reducing valve (2) output, wherein entering all the way in oxygen-eliminating device (7), another way is entered
Enter into high pressure cylinder packing (11) and direct-contact desuperheater (10), then enter low pressure (LP) cylinder after direct-contact desuperheater (10) desuperheat again
In packing (12) and condenser (14), wherein, what direct-contact desuperheater (10) was exported in desuperheating process by condensate system (8)
Cooling water source of the water as direct-contact desuperheater (10), after steam turbine red switch, grid-connected and loaded-up, when steam turbine load reaches
Rated load more than 50% when, turbine steam seal realizes automatic-sealed, then close main steam system (1).
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108278590A (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 Cooling at reactor shutdown |
| CN108999653A (en) * | 2018-08-16 | 2018-12-14 | 华电电力科学研究院有限公司 | A kind of adjustable steam extraction formula steam turbine gland seal device and its working method |
| CN109767852A (en) * | 2019-02-22 | 2019-05-17 | 西安热工研究院有限公司 | A kind of secondary circuit security system and its working method for reactor emergency shut-down |
| CN111927566A (en) * | 2020-07-03 | 2020-11-13 | 东方电气集团东方汽轮机有限公司 | Shaft seal system for large back pressure steam turbine |
| CN113982700A (en) * | 2021-11-04 | 2022-01-28 | 华能山东石岛湾核电有限公司 | High temperature gas cooled reactor shaft seal steam supply system |
| CN114810224A (en) * | 2022-04-27 | 2022-07-29 | 西安热工研究院有限公司 | Control method for preventing expansion difference from exceeding limit before starting BEST small steam turbine |
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| CN108278590A (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 Cooling at reactor shutdown |
| CN108278590B (en) * | 2018-03-14 | 2023-08-01 | 西安热工研究院有限公司 | System and method for shutdown cooling of high-temperature gas cooled reactor nuclear power plant |
| CN108999653A (en) * | 2018-08-16 | 2018-12-14 | 华电电力科学研究院有限公司 | A kind of adjustable steam extraction formula steam turbine gland seal device and its working method |
| CN109767852A (en) * | 2019-02-22 | 2019-05-17 | 西安热工研究院有限公司 | A kind of secondary circuit security system and its working method for reactor emergency shut-down |
| CN109767852B (en) * | 2019-02-22 | 2024-06-04 | 西安热工研究院有限公司 | Two-loop safety system for reactor emergency shutdown and working method thereof |
| CN111927566A (en) * | 2020-07-03 | 2020-11-13 | 东方电气集团东方汽轮机有限公司 | Shaft seal system for large back pressure steam turbine |
| CN113982700A (en) * | 2021-11-04 | 2022-01-28 | 华能山东石岛湾核电有限公司 | High temperature gas cooled reactor shaft seal steam supply system |
| CN113982700B (en) * | 2021-11-04 | 2023-11-21 | 华能山东石岛湾核电有限公司 | High-temperature gas cooled reactor shaft seal steam supply system |
| CN114810224A (en) * | 2022-04-27 | 2022-07-29 | 西安热工研究院有限公司 | Control method for preventing expansion difference from exceeding limit before starting BEST small steam turbine |
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