US3163991A - Method and apparatus for starting a steam power plant - Google Patents

Method and apparatus for starting a steam power plant Download PDF

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Publication number
US3163991A
US3163991A US253392A US25339263A US3163991A US 3163991 A US3163991 A US 3163991A US 253392 A US253392 A US 253392A US 25339263 A US25339263 A US 25339263A US 3163991 A US3163991 A US 3163991A
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United States
Prior art keywords
steam
feedwater
steam generator
water
separator
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 - Lifetime
Application number
US253392A
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English (en)
Inventor
Capitaine Detlev
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.)
Sulzer AG
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Sulzer AG
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Filing date
Publication date
Application filed by Sulzer AG filed Critical Sulzer AG
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Publication of US3163991A publication Critical patent/US3163991A/en
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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
    • 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

Definitions

  • the present invention relates to a method and means for starting a steam power plant, more particularly to a steam power plant including a forced flow steam generator whose feedwater is preheated by steam from a source other than said steam generator, during the initial starting period of the plant.
  • the flow rate of operating medium through the steam generator before and immediately after starting heating of the steam generator may be considerably greater than the flow rate of the live steam required at that time.
  • the steam separated in the separator is conducted through the final sections of the heating surfaces of the "ice forced flow steam generator, before and during the initial starting period of the steam genera-tor, is conducted in a feedwater heater in heat exchange relation to the feedwater flowing from a turbine condenser to a feedwater reservoir and from the latter into the steam generator. After transferring most of its heat content to the feedwater the water is conducted to the condenser. In this way very little heat is Wasted by transfer to the condenser coolant.
  • the pressure in the water separator is higher than that in the feedwater reservoir the water separated in the separator may be conducted directly into the feedwater reservoir and no water is passed through the feedwater heater into the condenser.
  • feedwater heaters are provided for heating feedwater by means of steam tapped from the turbine during normal operation of the plant
  • one of these feedwater heaters may be used for heating the feedwater by means of hot water separated from the operating medium flowing through the steam generator during starting of the plant and no additional feedwater heater need be provided for carrying out the method according to the invention.
  • the water separator is connected to: the outlet of one of a plurality of tubular heating sections arranged in the steam generator in series relation with respect to the flow of the operating medium through the steam generator.
  • the steam space of the separator is connected to the inlet of the subsequent heating section for delivering steam thereinto for further heating the steam.
  • the outlet of the section wherefrom operating medium is conducted into the separator and the inlet for the subsequent heating section whereinto the separated steam is conducted are interconnected by a valved conduit steam generator and the steam leaving the steam generator is used for heating the pipe leading to the turbine and for heating the turbine.
  • An object of the invention is to provide a method and means which afford recovery of the heat contained in the water separated from the operating medium circulating through a forced flow steam generator during the starting period.
  • the method and means according to the invention avoid the shortcomings of conventional systems and avoid the provision of additional pumps which increase first cost and operating expenses.
  • hot water separated in a separator from the operating medium flowing through a affording by-passing a controlled amount of operating medium around the separator avoids provision of a separator which is so large as to pass all operating medium during full load operation at a reasonable pressure drop in the separator and a water separator can be provided which is just large enough to cope with the requirements of the star-ting operation of the plant.
  • a separator which is so large as to pass all operating medium during full load operation at a reasonable pressure drop in the separator and a water separator can be provided which is just large enough to cope with the requirements of the star-ting operation of the plant.
  • a portion or no operating medium may be passed through the separator and a portion or all of the operating medium is bypassed around the separator.
  • numeral 1 designates a steam generator having tubular heating surfaces including an economizer 2, and evaporator 3, a preliminary superheater 4, and a final superheater comprising two sections 5 and 6; no heating means for the steam generator are shown.
  • the sections 2, 3, 4, 5 and 6 are arranged in series relation with respect to the flow
  • a pipe 9 the pipes 9 and 11.
  • the final superheater section 6 is connected to a high pressure turbine 14 by means of a pipe 13.
  • the operating medium expanded in the turbine 14 flows through a pipe 15 to the reheater 7 and therefrom through a pipe 16 to a low pressure turbine 17. After expansion of the operating medium in the low pressure turbine 17 the operating medium is conducted through a pipe 18 into a condenser 19.
  • the condensate is pumped by a pump 20 through a conduit 21 wherein low pressure preheaters 22 and 23 are arranged in series relation, to a feedwater reservoir 24.
  • the operating medium passing through the sections 2, 3 and 4 of the tubular heating system of the steamgenerator is a mixture of steam and water.
  • the water is separated from the steam in the separator 10 and the steam is conducted through the pipe 11 into the superheater section 5.
  • the water separated in the separator 10 is conducted through a valved pipe 29 into a heat exchanger 3% which is interposed in the pipe 21 between the low pressure heat exchanger 23 and the feedwater reservoir 24. After transferring heat to the feedwater flowing'through the heat exchanger 3% the Water from the separator It is conducted through a pipe 31 into the condenser 19.
  • the feedwater heater 3% need not be an additional feedwater heater, but may be one of the conventional feed- Water heaters which are heated by steam tapped from the turbine 17.
  • a valved pipe 33 interconnects the separator 10 and the feedwater reservoir 24 for conducting the water from the separator directly into the reservoir 24 when, after the initial starting period, the pressure in the separator is higher than in the reservoir.
  • the pipe 31 may terminate in an auxiliary condenser, not shown.
  • a method of starting a steam power plant including a forced flow steam generator, a steam turbine receiving steam from said steam generator, and a condenser receiv exhaust steam. from said turbine, comprising, in combination:
  • feedwater conduit means connecting said condenser to said steam generator for supplying feedwater to the latter
  • steam supply means connected to said reservoir for supplying heating steam thereto from a source other than said steam generator, for heating the feedwater in said reservoir during starting of the plant,
  • said steam generator including a heating tube system for conducting operating medium therethrough and heating the operating medium therein, and
  • a water separator interposed in said tube system for separating water from the operating medium and returning the remaining steam to said tube system for further heating the steam
  • said Water separator being connected to said feedwate-r heater for supplying water separated in said separator as a heating agent to said feedwater heater for heating the feedwater therein.
  • said heating tube system includes a plurality of heating sections arranged in series relation with respect to the flow of the operating medium therethrough, said separator being connected to the outlet of one said sections for receiving operating medium therefrom and to the inlet of the subsequent section for delivering steam therein-to, a valved conduit interconnecting said sections to: which said separator is connected and ay-passing said separator for passing a controlled portion of operating medium around said separator.
  • valved conduit connected to said separator and to said reservoir for conducting water separated in said separator into said reservoir.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Steam Boilers And Waste-Gas Boilers (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
US253392A 1962-01-30 1963-01-23 Method and apparatus for starting a steam power plant Expired - Lifetime US3163991A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEM51616A DE1200326B (de) 1962-01-30 1962-01-30 Verfahren zum Anfahren einer Dampfkraftanlage

Publications (1)

Publication Number Publication Date
US3163991A true US3163991A (en) 1965-01-05

Family

ID=7307183

Family Applications (1)

Application Number Title Priority Date Filing Date
US253392A Expired - Lifetime US3163991A (en) 1962-01-30 1963-01-23 Method and apparatus for starting a steam power plant

Country Status (4)

Country Link
US (1) US3163991A (de)
CH (1) CH399490A (de)
DE (1) DE1200326B (de)
GB (1) GB963351A (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3667217A (en) * 1969-05-14 1972-06-06 Stein Industrie Steam gas turbine including a gas turbine and a steam turbine with a steam generator at the downstream end
US4060990A (en) * 1976-02-19 1977-12-06 Foster Wheeler Energy Corporation Power generation system
US4316362A (en) * 1978-11-29 1982-02-23 Hitachi, Ltd. Method and apparatus for operating a cross-compound turbine generator plant
US4858562A (en) * 1987-05-06 1989-08-22 Hitachi, Ltd. Reheat type waste heat recovery boiler and power generation plant
US20060248891A1 (en) * 2005-05-04 2006-11-09 Kvaerner Power Oy Reheating steam temperature control
US20090260585A1 (en) * 2008-04-22 2009-10-22 Foster Wheeler Energy Corporation Oxyfuel Combusting Boiler System and a Method of Generating Power By Using the Boiler System
WO2013000838A3 (de) * 2011-06-28 2013-03-21 Siemens Aktiengesellschaft Verfahren und dampfkraftwerk mit hilfsdampferzeuger als zusätzliche frequenz- bzw. primär- und/oder sekundärregelmassnahme
US20130263594A1 (en) * 2010-12-01 2013-10-10 Ola Hall Arrangement and method for converting thermal energy to mechanical energy
WO2017068176A1 (de) * 2015-10-23 2017-04-27 Mitsubishi Hitachi Power Systems Europe Gmbh Verfahren zur speisewasservorwärmung eines dampferzeugers eines kraftwerks und dampfkraftwerk zur durchführung des verfahrens

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2989038A (en) * 1956-04-26 1961-06-20 Duerrwerke Ag Device for starting-up once-through boilers
US3008295A (en) * 1958-04-21 1961-11-14 Sulzer Ag Steam power plant
US3016712A (en) * 1960-07-14 1962-01-16 Foster Wheeler Corp Method and apparatus for preheating boiler feed water for steam power plants

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT201627B (de) * 1956-11-22 1959-01-10 Sulzer Ag Dampfkraftanlage
DE1043347B (de) * 1956-11-29 1958-11-13 Siemens Ag Anfahrschaltung fuer Dampfkraftanlagen ohne Heissdampfschieber vor der Turbine
CH357415A (de) * 1958-04-21 1961-10-15 Sulzer Ag Dampfkraftanlage

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2989038A (en) * 1956-04-26 1961-06-20 Duerrwerke Ag Device for starting-up once-through boilers
US3008295A (en) * 1958-04-21 1961-11-14 Sulzer Ag Steam power plant
US3016712A (en) * 1960-07-14 1962-01-16 Foster Wheeler Corp Method and apparatus for preheating boiler feed water for steam power plants

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3667217A (en) * 1969-05-14 1972-06-06 Stein Industrie Steam gas turbine including a gas turbine and a steam turbine with a steam generator at the downstream end
US4060990A (en) * 1976-02-19 1977-12-06 Foster Wheeler Energy Corporation Power generation system
US4316362A (en) * 1978-11-29 1982-02-23 Hitachi, Ltd. Method and apparatus for operating a cross-compound turbine generator plant
US4858562A (en) * 1987-05-06 1989-08-22 Hitachi, Ltd. Reheat type waste heat recovery boiler and power generation plant
US20060248891A1 (en) * 2005-05-04 2006-11-09 Kvaerner Power Oy Reheating steam temperature control
US7331181B2 (en) * 2005-05-04 2008-02-19 Metso Power Oy Reheating steam temperature control
US20090260585A1 (en) * 2008-04-22 2009-10-22 Foster Wheeler Energy Corporation Oxyfuel Combusting Boiler System and a Method of Generating Power By Using the Boiler System
US20130263594A1 (en) * 2010-12-01 2013-10-10 Ola Hall Arrangement and method for converting thermal energy to mechanical energy
US9341087B2 (en) * 2010-12-01 2016-05-17 Scania Cv Ab Arrangement and method for converting thermal energy to mechanical energy
WO2013000838A3 (de) * 2011-06-28 2013-03-21 Siemens Aktiengesellschaft Verfahren und dampfkraftwerk mit hilfsdampferzeuger als zusätzliche frequenz- bzw. primär- und/oder sekundärregelmassnahme
RU2559208C1 (ru) * 2011-06-28 2015-08-10 Сименс Акциенгезелльшафт Вспомогательный парогенератор в качестве дополнительного средства регулирования частоты или средства первичного и/или вторичного регулирования в пароэлектростанции
WO2017068176A1 (de) * 2015-10-23 2017-04-27 Mitsubishi Hitachi Power Systems Europe Gmbh Verfahren zur speisewasservorwärmung eines dampferzeugers eines kraftwerks und dampfkraftwerk zur durchführung des verfahrens

Also Published As

Publication number Publication date
GB963351A (en) 1964-07-08
CH399490A (de) 1965-09-30
DE1200326B (de) 1965-09-09

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