US20090288415A1 - Method for Warming-Up a Steam Turbine - Google Patents

Method for Warming-Up a Steam Turbine Download PDF

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Publication number
US20090288415A1
US20090288415A1 US12/083,257 US8325706A US2009288415A1 US 20090288415 A1 US20090288415 A1 US 20090288415A1 US 8325706 A US8325706 A US 8325706A US 2009288415 A1 US2009288415 A1 US 2009288415A1
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US
United States
Prior art keywords
steam
turbine section
pressure turbine
pressure
accumulating
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.)
Abandoned
Application number
US12/083,257
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English (en)
Inventor
Edwin Gobrecht
Karsten Peters
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
Assigned to SIEMENS AKTIENGESELLSCHAFT reassignment SIEMENS AKTIENGESELLSCHAFT ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GOBRECHT, EDWIN, PETERS, KARSTEN
Publication of US20090288415A1 publication Critical patent/US20090288415A1/en
Abandoned 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
    • 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steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating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
    • 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
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/08—Cooling; Heating; Heat-insulation
    • F01D25/10—Heating, e.g. warming-up before 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
    • 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
    • F01K7/165—Controlling means specially adapted therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T50/00—Aeronautics or air transport
    • Y02T50/60—Efficient propulsion technologies, e.g. for aircraft

Definitions

  • the invention relates to a method for warming-up a steam turbine which comprises an intermediate-pressure turbine section and/or low-pressure turbine section, wherein the intermediate-pressure turbine section on the outlet side has an accumulating device.
  • a steam turbine is also referred to as a turbomachine.
  • Water turbines, steam and gas turbines, wind wheels, centrifugal pumps and centrifugal compressors and also propellers, are brought together under the collective term of turbomachines. Common to all these machines is that they serve for the purpose of extracting energy from a fluid in order to drive another machine with it, or vice versa to supply energy to a fluid in order to increase its pressure.
  • the aforementioned temperature and pressure specifications are only reference values.
  • Turbine sections, which are designed for higher temperatures and for higher pressures, can also be referred to as high-pressure turbine sections.
  • An intermediate-pressure turbine section is customarily exposed to admission of superheated steam which has a temperature of 600° C. and a pressure of about 140 bar.
  • a low-pressure turbine section is customarily exposed to admission of steam which issues from the intermediate-pressure turbine section.
  • the steam which issues from the low-pressure turbine section is finally collected in a condenser and converted into water again.
  • the steam which issues from the high-pressure turbine section is heated in a reheater and is fed into the intermediate-pressure turbine section.
  • the turbine shafts of intermediate-pressure turbine sections are customarily run up against a vacuum. That means, a comparatively low pressure prevails on the outlet side of the intermediate-pressure turbine section. For this reason, the saturation temperature and the density of the throughflowing steam in the intermediate-pressure turbine section is low. Consequently, the heat yield to the shaft by means of the steam is low, which leads to a delay when prewarming an intermediate-pressure turbine section. Consequently, the starting time of the steam turbine is altogether extended. A starting time which is too long is considered to be an impairment.
  • the object is achieved by means of a method for warming-up a steam turbine which comprises an intermediate-pressure turbine section and/or low-pressure turbine section, wherein the intermediate-pressure turbine section on the outlet side has an accumulating device, wherein during a starting process steam which flows through the intermediate-pressure turbine section is accumulated at an outlet by means of the accumulating device in such a way that the pressure of the steam in the intermediate-pressure turbine section is increased in such a way that the saturation temperature of the steam is increased.
  • the invention is based inter alia upon the aspect that by means of a controlled accumulating of the steam flow at the outlet of the intermediate-pressure turbine section during the starting process of the steam turbine, the pressure is increased. For example, by means of closing a flap the pressure at the outlet of the intermediate-pressure turbine section is increased. Increasing the pressure leads to the saturation temperature of the steam being increased.
  • the heat transfer values are particularly high in the case of saturated steam. These heat transfer values are higher than in the case of convective warming-up. Therefore, the temperature of the steam in the case of saturation is decisive for the heat yield to the shaft.
  • the temperature without the accumulating according to the invention is at about80° C. and about 0.5 bar.
  • the starting process of a steam turbine can be shortened during a cold start by up to an hour.
  • the accumulating device is arranged in the overflow line.
  • the overflow line in this case is a line which fluidically connects the outlet of the intermediate-pressure turbine section to the inlet of a low-pressure turbine section.
  • the accumulating device is formed with controllability.
  • a steam mass flow which flows discontinuously into the intermediate-pressure turbine section, could be varied by means of the controllable accumulating device in such a way that the heat yield to the thick-walled components of the intermediate-pressure turbine section occurs at the same time.
  • the temperature, the pressure and/or the steam mass flow could be used as input values for controlling the accumulating device.
  • the accumulating device is formed as a pivotable flap.
  • the forming of a pivotable flap is a comparatively inexpensive measure with which the desired effect, specifically the accumulating of steam, is achieved.
  • the steam on the outlet side of the intermediate-pressure turbine section is accumulated to pressure values of between 3 and 5 bar, and temperature values of between 130° C. and 150° C.
  • FIG. 1 shows a schematic representation of an intermediate-pressure turbine section and a low-pressure turbine section.
  • FIG. 1 a schematic representation of a steam turbine 8 is shown.
  • a steam turbine can comprise a high-pressure turbine section, intermediate-pressure turbine section and/or a low-pressure turbine section.
  • the steam turbine which is shown in the figure comprises an intermediate-pressure and a low-pressure turbine section.
  • live steam flows into a high-pressure turbine section, which is not shown in the figure, and is expanded there, and cooled down to a lower temperature.
  • This expanded and cooled-down steam is heated to a higher temperature in a reheater, which is not shown in more detail in FIG. 1 , and then fed into an intermediate-pressure turbine section 2 via a line 1 .
  • the steam which flows into the intermediate-pressure turbine section 2 expands, wherein the pressure and the temperature of the steam drop in the process.
  • the expanded steam flows from an outlet 3 via an overflow line 4 into an inlet 5 of a low-pressure turbine section 6 .
  • the intermediate-pressure turbine section 2 and low-pressure turbine section 6 which are shown in FIG. 1 , are to be seen as part of a steam turbine.
  • the high-pressure turbine section, the reheater, the condenser and various units, such as a pump, are not shown in more detail.
  • An accumulating device 7 is arranged in the overflow line 4 .
  • the accumulating device 7 can be formed with controllability and/or as a pivotable flap.
  • the accumulating device 7 is operated in such a way that the steam which issues at the outlet 3 is accumulated in front of the control flap, as a result of which the pressure of the steam is increased. Consequently, the saturation temperature of the steam is increased, which leads to an increase of the temperature transfer values of the steam to the intermediate-pressure turbine shaft of the intermediate-pressure turbine section 2 .
  • the intermediate-pressure turbine shaft is not shown in more detail.
  • the starting process of a steam turbine is shortened by about one hour as a result.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Control Of Turbines (AREA)
US12/083,257 2005-10-12 2006-10-11 Method for Warming-Up a Steam Turbine Abandoned US20090288415A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP05022279A EP1775429A1 (de) 2005-10-12 2005-10-12 Verfahren zum Aufwärmen einer Dampfturbine
EP05022279.3 2005-10-12
PCT/EP2006/067254 WO2007042523A2 (de) 2005-10-12 2006-10-11 Verfahren zum aufwärmen einer dampfturbine

Publications (1)

Publication Number Publication Date
US20090288415A1 true US20090288415A1 (en) 2009-11-26

Family

ID=36282973

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/083,257 Abandoned US20090288415A1 (en) 2005-10-12 2006-10-11 Method for Warming-Up a Steam Turbine

Country Status (10)

Country Link
US (1) US20090288415A1 (ru)
EP (2) EP1775429A1 (ru)
JP (1) JP2009511812A (ru)
KR (1) KR20080054439A (ru)
CN (1) CN101351621B (ru)
BR (1) BRPI0617303A2 (ru)
CA (1) CA2625470A1 (ru)
RU (1) RU2392452C2 (ru)
TW (1) TW200734528A (ru)
WO (1) WO2007042523A2 (ru)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110167820A1 (en) * 2010-01-12 2011-07-14 Mikael Fredriksson Heating system for a turbine
US10487746B2 (en) 2013-04-04 2019-11-26 Siemens Aktiengesellschaft Optimization of cold starts in thermal power stations, in particular in steam-electric power plants or in combined cycle power plants (CCPPS)
US10577962B2 (en) 2016-09-07 2020-03-03 General Electric Company Turbomachine temperature control system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3249183A1 (de) * 2016-05-23 2017-11-29 Siemens Aktiengesellschaft Vorrichtung und verfahren zum aufwärmen eines stellventils

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1499697A (en) * 1919-11-01 1924-07-01 Vaporackumulator Ab Steam-accumulator apparatus for steam plants
US1923251A (en) * 1931-05-22 1933-08-22 Bauer Gustav Gas or steam turbine casing
US2874711A (en) * 1953-02-04 1959-02-24 Rateau Soc Control of high-power turbines
US3375665A (en) * 1964-06-24 1968-04-02 Georg Gyarmathy Method and arrangement for utilizing steam power in steam power plants
US4290609A (en) * 1978-08-31 1981-09-22 Bbc, Brown, Boveri & Co., Ltd. Steam seal
US4492084A (en) * 1980-12-23 1985-01-08 Saarbergwerke Aktiengesellschaft Method for supplying remote heating circuits with heat from a thermal power plant
US4628693A (en) * 1984-03-01 1986-12-16 Alsthom-Atlantique Casing for district heating turbine
US4729217A (en) * 1984-01-31 1988-03-08 Bbc Brown, Boveri & Company, Limited Combined gas/steam power station plant
US5996350A (en) * 1997-01-10 1999-12-07 Siemens Aktiengesellschaft Method and apparatus for the superheating of steam
US6457313B1 (en) * 2001-05-21 2002-10-01 Mitsubishi Heavy Industries, Ltd. Pressure and flow rate control apparatus and plant system using the same
US20040013511A1 (en) * 2000-09-26 2004-01-22 Eckart Brackenhammer Method and device for preheating and draining steam supply lines connected to steam turbines
US20090249788A1 (en) * 2005-10-12 2009-10-08 Henri Diesterbeck Method for Warming-Up a Steam Turbine

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1228623B (de) * 1963-07-23 1966-11-17 Sulzer Ag Dampfkraftanlage mit Zwanglaufdampferzeuger und Zwischenueberhitzer
DE2029830C3 (de) * 1970-06-18 1974-04-11 Steag Ag, 4300 Essen Verfahren zum Anwärmen der Frischdampfleitung und der Zwischenüberhitzerleitung von Dampfturbinenanlagen
JPS5810104A (ja) * 1981-07-10 1983-01-20 Hitachi Ltd タ−ビンプラントおよびその制御方法
JPS61237802A (ja) * 1985-04-12 1986-10-23 Hitachi Ltd 蒸気タ−ビンの暖機方法
JP2633720B2 (ja) * 1990-10-12 1997-07-23 株式会社東芝 蒸気タービンのプレウォーミング方法
DE19506787B4 (de) * 1995-02-27 2004-05-06 Alstom Verfahren zum Betrieb einer Dampfturbine
DE19808596A1 (de) * 1998-02-28 1999-09-02 Babcock Kraftwerksrohrleitungs Verfahren und Vorrichtung zum Anwärmen und Entwässern einer Hochdruckdampfleitung
JP4363955B2 (ja) * 2003-10-27 2009-11-11 株式会社東芝 バタフライ弁型蒸気弁及びそれを用いた蒸気タービンプラント
JP2005226500A (ja) * 2004-02-10 2005-08-25 Chugoku Electric Power Co Inc:The 発電プラントの停止方法

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1499697A (en) * 1919-11-01 1924-07-01 Vaporackumulator Ab Steam-accumulator apparatus for steam plants
US1923251A (en) * 1931-05-22 1933-08-22 Bauer Gustav Gas or steam turbine casing
US2874711A (en) * 1953-02-04 1959-02-24 Rateau Soc Control of high-power turbines
US3375665A (en) * 1964-06-24 1968-04-02 Georg Gyarmathy Method and arrangement for utilizing steam power in steam power plants
US4290609A (en) * 1978-08-31 1981-09-22 Bbc, Brown, Boveri & Co., Ltd. Steam seal
US4492084A (en) * 1980-12-23 1985-01-08 Saarbergwerke Aktiengesellschaft Method for supplying remote heating circuits with heat from a thermal power plant
US4729217A (en) * 1984-01-31 1988-03-08 Bbc Brown, Boveri & Company, Limited Combined gas/steam power station plant
US4628693A (en) * 1984-03-01 1986-12-16 Alsthom-Atlantique Casing for district heating turbine
US5996350A (en) * 1997-01-10 1999-12-07 Siemens Aktiengesellschaft Method and apparatus for the superheating of steam
US20040013511A1 (en) * 2000-09-26 2004-01-22 Eckart Brackenhammer Method and device for preheating and draining steam supply lines connected to steam turbines
US6457313B1 (en) * 2001-05-21 2002-10-01 Mitsubishi Heavy Industries, Ltd. Pressure and flow rate control apparatus and plant system using the same
US20090249788A1 (en) * 2005-10-12 2009-10-08 Henri Diesterbeck Method for Warming-Up a Steam Turbine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110167820A1 (en) * 2010-01-12 2011-07-14 Mikael Fredriksson Heating system for a turbine
US8695342B2 (en) * 2010-01-12 2014-04-15 Siemens Aktiengesellschaft Heating system for a turbine
US10487746B2 (en) 2013-04-04 2019-11-26 Siemens Aktiengesellschaft Optimization of cold starts in thermal power stations, in particular in steam-electric power plants or in combined cycle power plants (CCPPS)
US10577962B2 (en) 2016-09-07 2020-03-03 General Electric Company Turbomachine temperature control system

Also Published As

Publication number Publication date
TW200734528A (en) 2007-09-16
CN101351621B (zh) 2012-12-05
RU2008118368A (ru) 2009-11-20
BRPI0617303A2 (pt) 2011-07-19
EP1775429A1 (de) 2007-04-18
WO2007042523A3 (de) 2007-09-13
RU2392452C2 (ru) 2010-06-20
CN101351621A (zh) 2009-01-21
CA2625470A1 (en) 2007-04-19
JP2009511812A (ja) 2009-03-19
EP1934433A2 (de) 2008-06-25
WO2007042523A2 (de) 2007-04-19
KR20080054439A (ko) 2008-06-17

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AS Assignment

Owner name: SIEMENS AKTIENGESELLSCHAFT, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:GOBRECHT, EDWIN;PETERS, KARSTEN;REEL/FRAME:020854/0540

Effective date: 20080311

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION