GB918779A - Improvements in governing system for reheat steam turbine powerplant - Google Patents
Improvements in governing system for reheat steam turbine powerplantInfo
- Publication number
- GB918779A GB918779A GB26904/59A GB2690459A GB918779A GB 918779 A GB918779 A GB 918779A GB 26904/59 A GB26904/59 A GB 26904/59A GB 2690459 A GB2690459 A GB 2690459A GB 918779 A GB918779 A GB 918779A
- Authority
- GB
- United Kingdom
- Prior art keywords
- turbine
- valves
- valve
- steam
- pressure
- Prior art date
- 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
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 6
- 238000010792 warming Methods 0.000 abstract 2
- 238000000034 method Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 239000007921 spray Substances 0.000 abstract 1
Classifications
-
- 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
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/16—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type
- F01K7/22—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type the turbines having inter-stage steam heating
- F01K7/24—Control or safety means specially adapted therefor
-
- 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
- F01K3/00—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein
- F01K3/18—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein having heaters
- F01K3/20—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein having heaters with heating by combustion gases of main boiler
- F01K3/22—Controlling, e.g. starting, stopping
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Turbines (AREA)
Abstract
918,779. Steam turbine plant. GENERAL ELECTRIC CO. Aug. 6, 1959 [Aug. 22, 1958], No. 26904/59. Class 110 (3). A steam turbine plant comprising a steam generator feeding a turbine stage which discharges through a reheater and intercept valve to a further turbine stage, has starting valves to admit limited quantities of live steam directly from the steam generator to the inlets of the turbine stages and actuating means for progressively closing the starting valves as the intercept valve opens during starting. The plant shown comprises a super-pressure turbine section 3, the exhaust from which passes through a reheater 43 to a high-pressure turbine section 4. The turbine section 4 discharges through a reheater 42 to two intermediate pressure sections 4, 5 arranged in parallel which discharge through low-pressure turbine sections 7, 8 to condensers. The turbine sections 3, 5, 7 form a first turbine unit 1 and the sections 4, 6, 8 a second turbine unit 2. Steam is fed to the turbines from a boiler 44 and superheater 47. Valves 13, 14, 15 are intercept valves arranged to shut off steam to the turbine sections 4, 5 and 6, respectively, in an emergency. The plant is started as follows. When the steam generator and turbine are cold, the boiler feed pump 45 is started up and circulates cold water through the boiler 44, superheater 47, super high pressure turbine by-pass valve 50, conduit 51, water separator 52, and condenser hot well 54. When 30% of the rated flow is established, the boiler is fired and the water pressure rises to the full rated pressure. The by-pass 50 is controlled by the pressure and temperature at the superheater outlet. As the temperature rises a certain amount of the water flashes into steam as it passes through the valve 50. The water is separated from the mixture in the separator 52 and returned to the condenser hot-well 54. The steam passes through conduits 55, 56, highpressure reheater 43 and conduit 57 to the high-pressure turbine by-pass valve 58 and then through conduit 50 to the low-pressure reheater 42. This reheater discharges through a lowpressure turbine by-pass valve 61 to the condenser 62. As the heat input to the boiler 44 increases, water is injected into the desuperheating spray chambers 63, 64, 65 to prevent damage to the piping and condenser tubes. During this process the by-pass valves 58 and 61 are adjusted manually so as to gradually raise the pressures maintained in the high and lowpressure reheaters 43, 42. To warm up the turbine sections 3, 4, a small amount of warming steam is admitted to the discharge ends of these turbines by manually opening the valves 66, 67. After warming, the valves 66, 67 are manually closed and the boiler stop valve 70, main stop valve 48, high-pressure reheater stop valve 72 and the low-pressure reheater stop valves 73, 74 manually opened. The adjustable loadlimiting device 35 is now backed away from the right hand end of lever 20 which rises and causes rack 25 to rotate cams 75, 79, 77, and open the pilot valve 10 in the main control valve 9 and two starting valves 11, 12. This admits live steam into the turbine sections 3, 4, 5 and through conduit 38 to the turbine section 6. Orifices 39, 40, 78 limit the flow. The quantity of steam is so selected that the heat generated in the respective turbine sections by turbulence is removed. When the governor 28 reaches the rated speed the generator driven by the turbine is connected to an A.C. network so that when the synchronizing device 29 is actuated to open the valves 11, 12, 13 any tendency for the turbine to overspeed is prevented. This action continues until the cam-shaft 16 fully opens the starting valves 10, 11, 12. At this point the cam 76 begins to open the intercept valve 14, cam 21 the intercept valve 13 and cam 22 the intercept valve 15. At the same time as valves 13, 14, 15 begin to open, the valve actuating rod 36 begins to lift the main governor valve 37. Further actuation of the synchronizing device 29, begins to close the starting valves 11, 12 and to open the intercept valves 13, 14, 15. This operation continues until the valves 11, 12 are completely closed and the valves 13, 14, 15 fully open. This is the normal operating condition. During starting the by-pass valve 50 has been acting to maintain the discharge pressure at the superheater outlet. By the time 30% load is reached by-pass valve 50 is completely closed. Under these conditions, the by-pass valves 58 and 61 are completely closed. All the boiler flow is now passing through the main inlet valve to the turbine 3 and through the intercept valves 13, 14, 15 to the turbines 4, 5, 6. The intercept valves 13, 15 are actuated by the main governor 28 acting through links 30, 31, 32. The valves 13, 15 may also be operated by the pre-emergency governor 34 if the speed for which the governor is set is exceeded.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US756607A US2902831A (en) | 1958-08-22 | 1958-08-22 | Governing system for reheat steam turbine powerplant |
Publications (1)
Publication Number | Publication Date |
---|---|
GB918779A true GB918779A (en) | 1963-02-20 |
Family
ID=25044232
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB26904/59A Expired GB918779A (en) | 1958-08-22 | 1959-08-06 | Improvements in governing system for reheat steam turbine powerplant |
Country Status (3)
Country | Link |
---|---|
US (1) | US2902831A (en) |
CH (1) | CH380161A (en) |
GB (1) | GB918779A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2176248A (en) * | 1985-06-08 | 1986-12-17 | Northern Eng Ind | Turbine control |
CN109779699A (en) * | 2019-02-02 | 2019-05-21 | 华电电力科学研究院有限公司 | A kind of quick start system and its operation method of energy-efficient Turbo-generator Set |
CN113090343A (en) * | 2021-04-25 | 2021-07-09 | 浙江浙能兰溪发电有限责任公司 | Method for shortening cold-state starting time of steam turbine |
CN113356939A (en) * | 2021-07-20 | 2021-09-07 | 广东韶钢松山股份有限公司 | Method and system for rapidly starting main pipe unit in cold state |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3244898A (en) * | 1959-12-29 | 1966-04-05 | Combustion Eng | Power plant system and control therefor |
DE1297624B (en) * | 1964-03-14 | 1969-06-19 | Siemens Ag | Steam power plant |
GB1185630A (en) * | 1966-11-04 | 1970-03-25 | Parsons C A & Co Ltd | Improvements in and relating to Speed Governing Systems for Steam Turbines |
US3934419A (en) * | 1973-06-12 | 1976-01-27 | Westinghouse Electric Corporation | Load control system especially adapted for a HTGR power plant turbine |
US4007595A (en) * | 1975-09-30 | 1977-02-15 | Westinghouse Electric Corporation | Dual turbine power plant and a reheat steam bypass flow control system for use therein |
US4274259A (en) * | 1976-09-30 | 1981-06-23 | Westinghouse Electric Corp. | Superheated steam power plant with steam to steam reheater |
JPS5572608A (en) * | 1978-11-29 | 1980-05-31 | Hitachi Ltd | Driving process of cross-compound turbine bypath system and its installation |
US4226086A (en) * | 1979-05-21 | 1980-10-07 | Westinghouse Electric Corp. | Automatic restart control for a power plant boiler |
US4343682A (en) * | 1980-08-20 | 1982-08-10 | Grimes Arthur S | Plant having feed water heating means for nuclear units during plant start up and method of operating the same |
US6012290A (en) * | 1998-06-19 | 2000-01-11 | Garcia; Jaime G. | Condenser performance optimizer in steam power plants |
WO2004081479A2 (en) * | 2003-03-10 | 2004-09-23 | Clean Energy Systems, Inc. | Reheat heat exchanger power generation systems |
JP4898956B2 (en) * | 2008-08-11 | 2012-03-21 | 三菱重工業株式会社 | Steam turbine equipment |
CN103527270B (en) * | 2013-10-12 | 2015-03-18 | 上海电力学院 | Steam turbine thermalized steam flow single-reheat power and power co-production thermal system |
CN104121044B (en) * | 2014-07-24 | 2015-12-30 | 江苏永钢集团有限公司 | The method of controlling security of generator jumped by a kind of turbine emergency protector connection |
US9470112B2 (en) * | 2014-11-13 | 2016-10-18 | General Electric Company | System and method for heat recovery and steam generation in combined cycle systems |
CN106948880A (en) * | 2017-04-22 | 2017-07-14 | 冯煜珵 | A kind of high-order vertically arranged Turbo-generator Set |
CN108167032B (en) * | 2017-12-26 | 2023-06-27 | 中国大唐集团科学技术研究院有限公司火力发电技术研究所 | NCB type heating turbine back pressure mode starting system and method |
CN114607477B (en) * | 2022-04-01 | 2023-08-01 | 邹平滨能能源科技有限公司 | Rapid cooling method for unit turbine |
-
1958
- 1958-08-22 US US756607A patent/US2902831A/en not_active Expired - Lifetime
-
1959
- 1959-08-06 GB GB26904/59A patent/GB918779A/en not_active Expired
- 1959-08-21 CH CH7723559A patent/CH380161A/en unknown
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2176248A (en) * | 1985-06-08 | 1986-12-17 | Northern Eng Ind | Turbine control |
CN109779699A (en) * | 2019-02-02 | 2019-05-21 | 华电电力科学研究院有限公司 | A kind of quick start system and its operation method of energy-efficient Turbo-generator Set |
CN109779699B (en) * | 2019-02-02 | 2023-09-05 | 华电电力科学研究院有限公司 | High-efficiency energy-saving quick starting system of steam turbine generator unit and operation method thereof |
CN113090343A (en) * | 2021-04-25 | 2021-07-09 | 浙江浙能兰溪发电有限责任公司 | Method for shortening cold-state starting time of steam turbine |
CN113090343B (en) * | 2021-04-25 | 2023-03-14 | 浙江浙能兰溪发电有限责任公司 | Method for shortening cold-state starting time of steam turbine |
CN113356939A (en) * | 2021-07-20 | 2021-09-07 | 广东韶钢松山股份有限公司 | Method and system for rapidly starting main pipe unit in cold state |
CN113356939B (en) * | 2021-07-20 | 2022-10-14 | 广东韶钢松山股份有限公司 | Method and system for cold-state quick start of main pipe unit |
Also Published As
Publication number | Publication date |
---|---|
CH380161A (en) | 1964-07-31 |
US2902831A (en) | 1959-09-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB918779A (en) | Improvements in governing system for reheat steam turbine powerplant | |
US4873827A (en) | Steam turbine plant | |
EP1866521B1 (en) | Process for starting a gas and steam turbine plant | |
US3277651A (en) | Steam power plant including a forced flow steam generator and a reheater | |
JP2004515673A (en) | Fuel heating apparatus and method for combined gas and steam turbine equipment | |
US5850739A (en) | Steam turbine power plant and method of operating same | |
US2747373A (en) | Quick-starting governing system for reheat turbine | |
US2579027A (en) | Overheat protection for steam reheaters | |
US3264826A (en) | Method of peaking a power plant system | |
GB957371A (en) | Vapour-generating power plants | |
US3457725A (en) | Apparatus for covering a peak load or a rapidly changing load in a steam turbine plant | |
US4099385A (en) | Extended fuel cycle operation for pressurized water reactor plants | |
US3226932A (en) | Devices for improving operating flexibility of steam-electric generating plants | |
US3304716A (en) | Start-up system for forced flow vapor generator | |
ES342538A1 (en) | Start-up system for forced flow vapor generator | |
US3271961A (en) | Start-up system for forced flow vapor generator | |
JP2587419B2 (en) | Supercritical once-through boiler | |
US3448581A (en) | Large steam power plant suitable for handling peak loads | |
US3411299A (en) | Peak load operation in steam power plants | |
US3361117A (en) | Start-up system for forced flow vapor generator and method of operating the vapor generator | |
GB1083170A (en) | Common startup system for vapour generators | |
US3356074A (en) | Vapor generating organziation and method | |
SU853125A1 (en) | Steam power plant with two-shaft turbine | |
ES309237A1 (en) | Improvements in and relating to steam valves | |
GB822012A (en) | Improvements relating to fluid pressure reducing apparatus |