EP2942493A1 - Wasserdampfkreislauf sowie ein Verfahren zum Betreiben eines Wasserdampfkreislaufes - Google Patents

Wasserdampfkreislauf sowie ein Verfahren zum Betreiben eines Wasserdampfkreislaufes Download PDF

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Publication number
EP2942493A1
EP2942493A1 EP14167157.8A EP14167157A EP2942493A1 EP 2942493 A1 EP2942493 A1 EP 2942493A1 EP 14167157 A EP14167157 A EP 14167157A EP 2942493 A1 EP2942493 A1 EP 2942493A1
Authority
EP
European Patent Office
Prior art keywords
steam
pressure turbine
pressure
turbine
line
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.)
Withdrawn
Application number
EP14167157.8A
Other languages
German (de)
English (en)
French (fr)
Inventor
Bernd Leu
Martin Ophey
Klaus Rothe
David Veltmann
Kai Brune
Matthias Heue
Rudolf PÖTTER
Michael Schütz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to EP14167157.8A priority Critical patent/EP2942493A1/de
Priority to BR112016025215A priority patent/BR112016025215A2/pt
Priority to US15/306,545 priority patent/US10167742B2/en
Priority to CN201580023915.7A priority patent/CN106255807B/zh
Priority to PCT/EP2015/058308 priority patent/WO2015169562A1/de
Priority to JP2016566684A priority patent/JP6685237B2/ja
Priority to EP15716068.0A priority patent/EP3111059B1/de
Priority to RU2016147413A priority patent/RU2653617C1/ru
Priority to KR1020167033771A priority patent/KR20160148013A/ko
Publication of EP2942493A1 publication Critical patent/EP2942493A1/de
Withdrawn legal-status Critical Current

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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
    • F01K13/00—General layout or general methods of operation of complete plants
    • F01K13/02—Controlling, e.g. stopping or starting
    • 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
    • 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
    • F01K9/00—Plants characterised by condensers arranged or modified to co-operate with the engines
    • F01K9/04—Plants characterised by condensers arranged or modified to co-operate with the engines with dump valves to by-pass stages

Definitions

  • the present invention relates to a steam cycle for a power plant and a method for operating a steam cycle.
  • the starting line In order to convert steam turbines from the prior art of starting operation or idling in the power operation, the starting line is closed. Closing the starting line is necessary because the mass flow of the steam, which is supplied to the condenser via the starting line, is not available for cooling the intermediate superheating.
  • the pressure at the outlet from the high-pressure turbine increases and thus the outlet temperature the high-pressure turbine.
  • An impermissible temperature increase after closing the starting line can be prevented by a simultaneous increase in the mass flow through the high-pressure turbine.
  • Too fast closing of the starting line leads to pressure fluctuations in the water / steam cycle, which can lead to a turbine short circuit.
  • the object of the invention is to make the start-up process "smoother" and more fluid and thus lower the load on the components.
  • the controller for closing the starting valve and the controller for opening the live steam valves are integrated in a common module.
  • the common controller can control the opening of the live steam valves and the closing of the starting valve.
  • a further advantageous development is that in a line section between the high-pressure turbine and the reheater a check device is provided which prevents backflow of the steam in the direction of the high-pressure turbine.
  • a check-back device reliably ensures that in no operating state steam flows back from the reheater into the high-pressure turbine and possibly favors a turbine quick-closing.
  • a particularly simple and effective check device is a check valve.
  • a further advantageous development consists in that, at least in sections, a further line is arranged parallel to the starting line, which likewise connects the high-pressure turbine or the exhaust-steam region to the condenser.
  • An inventive development of the method is that the pressure of the steam prior to entry into the high-pressure turbine, in particular in a blading space of the high-pressure turbine, time-delayed and ramped raised. By gradually increasing the pressure, the mass flow through the high pressure turbine can be easily controlled.
  • a further advantageous development is that an increase in the pressure of the steam before entering the high-pressure turbine, in particular before entering the blading space, takes place at a defined position of the starting valve.
  • a defined position of the starting valve which partially closes the starting line, can limit the mass flow through the starting line and thus be used as a further controlled variable.
  • an opening of the live steam valves can be controlled via the increase in the desired pressure value at a pressure limiting regulator before entry into the high-pressure turbine or into the blading space.
  • Fig. 1 shows a steam cycle 10 with a high pressure turbine 12, a medium pressure turbine 50 and a low pressure turbine 60.
  • the turbines (12,50,60) are arranged on a common shaft, which is coupled to a generator, not shown.
  • the steam circuit 10 further includes a steam generator 30, a condenser 40 and a feed pump 70.
  • the steam generator 30 is connected via a first line 17 to the high-pressure turbine 12, wherein the first line 17 live steam valves 14,15 are arranged, via which a steam supply the steam generator 30 can be prevented.
  • the main steam valve 14 acts as a live steam quick-closing valve and the main steam valve 15 as a main steam control valve.
  • a pressure limiting controller 29 is arranged, via which the mass flow of steam from the steam generator 30 to the high-pressure turbine 12 can be limited.
  • the high-pressure turbine 12 is followed in the flow direction of the steam, a Abdampf Suite 13, which is supplied with steam leaving the high-pressure turbine 12 at the outlet.
  • the exhaust steam region 13 is connected to a reheater 20 via a line section 18, in which a non-return valve 19 is arranged.
  • the reheater 20 is arranged via a line 37, in the main steam valves 38,39 for shut-off or regulation of the steam supply, connected to the medium pressure turbine 50.
  • the reheater 20 is further connected via a line 35 to the condenser 40, wherein in the line 35, a medium-pressure Umleitstation 36 is arranged downstream with Abspritz worn 33, with which the pressure supply of the medium-pressure turbine 50 can be controlled.
  • the steam generator 30 is further connected via a line 21, in which a high-pressure Umleitstation 22 and a sprayer 55 are arranged, with the reheater 20.
  • the exhaust steam region 13 is connected to the condenser 40 via a starting line 23, 25.
  • a starting valve 27 and a spraying device 34 are arranged in the starting line 25.
  • the starting valve 27 can be regulated via a controller 26 and can be partially opened between the positions "completely open” and "completely closed” at least in discrete intermediate stages. Alternatively, a completely controllable starting valve 27 would be possible.
  • a discharge line 28 is arranged parallel to the starting line 25, which also opens into the condenser 40.
  • the drain line can be opened via a drain valve 24.
  • the steam generator 30 is connected via a line 52 to the low-pressure turbine 60, wherein in the line 52, a control valve 53 is arranged, which controls the steam supply into the low-pressure turbine 60.
  • the medium-pressure turbine 50 is connected via a line 51 to the low-pressure turbine 60, wherein the line 52 opens into the conduit 51.
  • a line 54 leads to the condenser 40, which in turn is connected via a line 41 to the feed pump 70.
  • the feed pump 70 is connected via a line 42 to the steam generator 30.
  • the steam generator 30 is supplied via the pressure-increasing feed pump 70 and the line 42 with water.
  • the water is evaporated and overheated.
  • This steam is over the first line 17 of the high-pressure turbine 12 is supplied, wherein the steam is partially relaxed.
  • the steam is again supplied with energy in the reheater 20, which it delivers via the medium-pressure turbine 50 and the low-pressure turbine 60.
  • the expanded steam then condenses in the condenser 40 and is returned via the line 41 as water to the steam generator 30, whereby the circuit is closed.
  • water can be supplied to the steam in the lines 21, 25 and 28 in order to lower the temperature of the steam when entering the condenser 40 or into the reheater 20.
  • a controller 26 is provided which opens the starting valve 27 in response to temperature, pressure and speed of the high-pressure turbine 12.
  • the corresponding sensors for detecting the rotational speed are not shown, but can easily on the shaft, which carries the turbine stages 12,50,60 and is connected to the generator, are arranged.
  • the sensors for detecting the temperature and the pressure are expediently arranged prior to entry into the blading chamber of the high-pressure turbine 12 or at the outlet of the high-pressure turbine 12 or in the exhaust steam region 13.
  • Fig. 2 a flow chart for starting a steam cycle with a steam turbine is shown.
  • a starting process of the steam turbine 12, 50, 60 is started.
  • the steam turbine 12, 50, 60 is accelerated by complete opening of the live steam quick-closing valves 14, 38 and subsequent opening of the live steam valves 15, 39.
  • the starting line 25 is opened by opening the starting valve 27 and the pressure limiting controller 29 is switched on.
  • a heating-up speed is achieved and the steam turbine 12,50,60 is further accelerated to rated speed.
  • the power of the steam turbine 12,50,60 is further increased until a mass flow of steam through the high-pressure turbine 12 without pressure limiting controller 29 would be so large that when the Anfahrtechnisch 25 an evaporating temperature after the high-pressure turbine 12 is barely allowed .
  • the closing operation of the starting valve 27 for closing the starting line 25 begins. From a defined position of the starting valve 27, a pressure setpoint value of the pressure limiting controller 29 becomes in the subsequent method steps [170], [171], [172], [173] time-delayed and ramped and raised at a certain speed. This results in a defined opening of the live steam valves 15,39. This process continues until the mass flow of steam through the high pressure turbine 12 has exceeded a threshold.
  • the starting line 25 or the starting valve 27 is completely closed and the steam turbine 12, 50, 60 is transferred into the power mode.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Turbines (AREA)
EP14167157.8A 2014-05-06 2014-05-06 Wasserdampfkreislauf sowie ein Verfahren zum Betreiben eines Wasserdampfkreislaufes Withdrawn EP2942493A1 (de)

Priority Applications (9)

Application Number Priority Date Filing Date Title
EP14167157.8A EP2942493A1 (de) 2014-05-06 2014-05-06 Wasserdampfkreislauf sowie ein Verfahren zum Betreiben eines Wasserdampfkreislaufes
BR112016025215A BR112016025215A2 (pt) 2014-05-06 2015-04-16 ciclo de vapor de água, e método para operação de um ciclo de vapor de água
US15/306,545 US10167742B2 (en) 2014-05-06 2015-04-16 Steam cycle, and method for operating a steam cycle
CN201580023915.7A CN106255807B (zh) 2014-05-06 2015-04-16 水蒸气回路以及用于运行水蒸气回路的方法
PCT/EP2015/058308 WO2015169562A1 (de) 2014-05-06 2015-04-16 Wasserdampfkreislauf sowie ein verfahren zum betreiben eines wasserdampfkreislaufes
JP2016566684A JP6685237B2 (ja) 2014-05-06 2015-04-16 水蒸気サイクル及び水蒸気サイクルの運転方法
EP15716068.0A EP3111059B1 (de) 2014-05-06 2015-04-16 Wasserdampfkreislauf sowie ein verfahren zum betreiben eines wasserdampfkreislaufes
RU2016147413A RU2653617C1 (ru) 2014-05-06 2015-04-16 Контур циркуляции водяного пара и способ эксплуатации контура циркуляции водяного пара
KR1020167033771A KR20160148013A (ko) 2014-05-06 2015-04-16 물 증기 회로 및 물 증기 회로 작동 방법

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14167157.8A EP2942493A1 (de) 2014-05-06 2014-05-06 Wasserdampfkreislauf sowie ein Verfahren zum Betreiben eines Wasserdampfkreislaufes

Publications (1)

Publication Number Publication Date
EP2942493A1 true EP2942493A1 (de) 2015-11-11

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Family Applications (2)

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EP14167157.8A Withdrawn EP2942493A1 (de) 2014-05-06 2014-05-06 Wasserdampfkreislauf sowie ein Verfahren zum Betreiben eines Wasserdampfkreislaufes
EP15716068.0A Active EP3111059B1 (de) 2014-05-06 2015-04-16 Wasserdampfkreislauf sowie ein verfahren zum betreiben eines wasserdampfkreislaufes

Family Applications After (1)

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EP15716068.0A Active EP3111059B1 (de) 2014-05-06 2015-04-16 Wasserdampfkreislauf sowie ein verfahren zum betreiben eines wasserdampfkreislaufes

Country Status (8)

Country Link
US (1) US10167742B2 (ru)
EP (2) EP2942493A1 (ru)
JP (1) JP6685237B2 (ru)
KR (1) KR20160148013A (ru)
CN (1) CN106255807B (ru)
BR (1) BR112016025215A2 (ru)
RU (1) RU2653617C1 (ru)
WO (1) WO2015169562A1 (ru)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3444449A1 (de) * 2017-08-18 2019-02-20 Siemens Aktiengesellschaft Anlage mit umleitstation

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4576008A (en) * 1984-01-11 1986-03-18 Westinghouse Electric Corp. Turbine protection system for bypass operation
US4693086A (en) * 1984-10-15 1987-09-15 Hitachi, Ltd. Steam turbine plant having a turbine bypass system
US5435138A (en) * 1994-02-14 1995-07-25 Westinghouse Electric Corp. Reduction in turbine/boiler thermal stress during bypass operation
WO2013031121A1 (ja) * 2011-08-30 2013-03-07 株式会社 東芝 蒸気タービンプラントおよびその運転方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4691086A (en) 1986-04-03 1987-09-01 Indak Manufacturing Corp. Pushbutton electrical switch having a flairing contactor loosely rotatable on a spring-biased eyelet
US5473898A (en) * 1995-02-01 1995-12-12 Westinghouse Electric Corporation Method and apparatus for warming a steam turbine in a combined cycle power plant
RU35374U1 (ru) 2003-10-16 2004-01-10 Открытое акционерное общество "Ленинградский Металлический завод" Устройство пуска энергоблока теплоэлектростанций
US8484975B2 (en) * 2008-02-05 2013-07-16 General Electric Company Apparatus and method for start-up of a power plant
US7987675B2 (en) * 2008-10-30 2011-08-02 General Electric Company Provision for rapid warming of steam piping of a power plant
JP5221443B2 (ja) * 2009-05-08 2013-06-26 株式会社東芝 一軸型複合サイクル発電プラントの起動方法および一軸型複合サイクル発電プラント
US8783043B2 (en) * 2009-07-15 2014-07-22 Siemens Aktiengesellschaft Method for removal of entrained gas in a combined cycle power generation system
EP2503112A1 (de) * 2011-03-24 2012-09-26 Siemens Aktiengesellschaft Verfahren zum schnellen Zuschalten eines Dampferzeugers

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4576008A (en) * 1984-01-11 1986-03-18 Westinghouse Electric Corp. Turbine protection system for bypass operation
US4693086A (en) * 1984-10-15 1987-09-15 Hitachi, Ltd. Steam turbine plant having a turbine bypass system
US5435138A (en) * 1994-02-14 1995-07-25 Westinghouse Electric Corp. Reduction in turbine/boiler thermal stress during bypass operation
WO2013031121A1 (ja) * 2011-08-30 2013-03-07 株式会社 東芝 蒸気タービンプラントおよびその運転方法

Also Published As

Publication number Publication date
US10167742B2 (en) 2019-01-01
KR20160148013A (ko) 2016-12-23
BR112016025215A2 (pt) 2017-08-15
WO2015169562A1 (de) 2015-11-12
US20170044935A1 (en) 2017-02-16
JP2017521591A (ja) 2017-08-03
CN106255807A (zh) 2016-12-21
EP3111059B1 (de) 2020-03-25
EP3111059A1 (de) 2017-01-04
RU2653617C1 (ru) 2018-05-11
JP6685237B2 (ja) 2020-04-22
CN106255807B (zh) 2018-02-23

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