US3742708A - Method and means for improving the operation under partial loads of a steam gas plant including a gas turbine and a steam turbine with a steam generator at the downstream end - Google Patents

Method and means for improving the operation under partial loads of a steam gas plant including a gas turbine and a steam turbine with a steam generator at the downstream end Download PDF

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Publication number
US3742708A
US3742708A US00037116A US3742708DA US3742708A US 3742708 A US3742708 A US 3742708A US 00037116 A US00037116 A US 00037116A US 3742708D A US3742708D A US 3742708DA US 3742708 A US3742708 A US 3742708A
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US
United States
Prior art keywords
steam
deaerator
turbine
gas
steam generator
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
US00037116A
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English (en)
Inventor
J Vidal
J Parisot
P Lugand
J Lemoine
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.)
Stein Industrie SA
Cegelec SA
Original Assignee
Stein Industrie SA
Cegelec SA
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 Stein Industrie SA, Cegelec SA filed Critical Stein Industrie SA
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Publication of US3742708A publication Critical patent/US3742708A/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
    • 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steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
    • F01K7/34—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 of extraction or non-condensing type; Use of steam for feed-water heating
    • F01K7/40—Use of two or more feed-water heaters in series
    • 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
    • F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
    • F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
    • F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
    • F01K23/10—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle
    • F01K23/103—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle with afterburner in exhaust boiler
    • F01K23/105—Regulating means specially adapted therefor

Definitions

  • ABSTRACT A steam gas plant comprising a gas turbine. a steam generator with burners fed by the exhaust gases of the gas turbinea steam turbinefed by the steam generator wherein steam is extracted at various points of the steam turbine to feed adeaerator receiving water from water heaters and returning the water to the steam generator, the extracted steam beingfed into the deaerator through channels controlledby nonreturn valves and, in at least one of such channels a gate controlled by the pressure prevailing in the deaerator so as to maintain the pressure substantially. constant.
  • I Our invention has more particularly for its object a method for operating such a plant so as to ensure in particular efficient utilisation of the entire plant under partial loads.
  • Our improved method consists in a deaerator receiving the water passing out of one or more heaters fed with steam extracted from different stages of the steam turbine so as to maintain a substantially constant pressure regardless of the load on the steam turbine.
  • our invention has also for its object a plant of the above-disclosed type adapted to execute the abovementioned method.
  • the deaerator receiving the water from one or more heaters is connected with several stages of the steam turbine through extracting channels in each of which is inserted a non-return valve while a number of said channels are provided with a valve or gate controlled by the pressure prevailing in the deaerator so as to maintain the pressure substantially constant.
  • Our improved plant includes as shown three gas turbines 1 fed with fuel at 2 and sending their exhaust gases into the burners of a steam generator 3 through the agency of three corresponding cut-off dampers 4.
  • the exhaust gases containing large amounts of oxygen, provide means for burning within the steam generator the fuel introduced into the generator at 5.
  • the steam generator 3 includes a superheater 6, a reheater 7 and three e conomizers 8, 9 and 10.
  • the flue gases pass in succession through the different parts before'they are exhausted through the chimney 11.
  • the plant includes also a two-stage steam turbine consisting of two stages or groups of stages 12a and 12b.
  • the input of the first stage or groupof. stages 12a is connected with the output of the superheater 6 while its output opens into the input of the reheater 7.
  • the input into the second stage or group of stages 12b is connected with the output of the reheater 7.
  • the output of the second group of stages 12b of the steam turbine is connected with the input of a pump 13 through the agency of a condenser, l4.
  • the condensed water is sent into a water heater l5 fed by steam produced by the first extraction port S1 in the turbine.
  • the stream of water passing out of the water heater 15 is divided into two fractions of which one is heated in the economizer l0 and the other passes through two water heaters 16 and 17 fed respectively with steam passing out of two further extraction portsSZ and S3 in the turbine.
  • the water passing out of the water heater 17 is mixed with that passing out of the economizer l0 and is sent into the deaerator 18 which is fed by steam fed off the extractingport S4 through a non-return valve l9or from the extracting port S5 through a non-return valve 20 associated with a gate 21 or from steam issuing from the output of the first group of stages 12a through a non-return valve 22 associated with a gate 23.
  • the stream of water is sucked in by a feed pump 24.
  • the pump delivers the water into the input of the steam generator 3 through the agency of a water heater 25 and an economizer 9, the economizer 9 being inserted in parallel with the water heater 25.
  • the gates 21 and 23 are controlled by the pressure prevailing in the deaerator 18, measured by an instrument 26 so that, if the pressure in the deaerator drops the gate 21 opens and, if the steam tapped off the extraction port S5 is not sufficient for maintaining the pressure in the deaerator at the desired value, the gate 23 in turn opens.
  • the non-return valves 19, 20 and 22 are designed in a manner such that they allow the steam to pass only towards the deaerator and prevent the steam from passing out of the group of stages 12a from entering the turbine through the extraction ports S4 and S5.
  • the deaerator 18 operates efficiently if the feed water reaches it at a temperature lower than the saturating temperature corresponding to the pressure of the extracted steam feeding it.
  • the temperature drops simultaneously with the load and with the pressure of the extracted steam.
  • Our method for operating the deaerator in a steamgas plant provides a reduction in the frequency of overhauling the gas turbines and also in their maintenance cost.
  • our improved method shows in particular the following advantages it produces an improved general efficiency for the plant under partial loads since it allows an increase in the exchanges in the economizer it allows a reduction in the frequency of overhauling the gas turbines and their maintenance cost, whereby the operation of the plant is extended during low loads with three gas turbines operating under full load.
  • a method for operating a steam gas plant including a gas turbine, a steam turbine with a steam generator at the downstream end, a deaerator and heat exchangers including at least one water heater and at least one economizer feeding water into said deaerator, the steps consisting in extracting steam from a plurality of different points of said steam turbine and feeding said extracted steam to said deaerator, the extraction of said steam being controlled by the pressure in said deaerator thereby to maintain said pressure in said deaerator substantially constant for all loads on the steam turbine.
  • a steam gas plant including at least one gas turbine, at least one steam generator with burnersfed by the exhaust of said gas turbine, at least one steam turbine fed by the steam of said steam generator and heat exchangers including at least one water heater and at least one economizer for the water feeding said steam generator, the provision of a deaerator located between said heat exchangers and said steam generator, a plurality of extracting channels adapted to feed said deaerator with steam from a plurality of different points of said steam turbine, a non-return valve in each of said channels, and a gate inserted in at least one of said channels and controlled by the pressure in said deaerator to maintain a substantially constant pressure in said deaerator.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
US00037116A 1969-05-14 1970-05-14 Method and means for improving the operation under partial loads of a steam gas plant including a gas turbine and a steam turbine with a steam generator at the downstream end Expired - Lifetime US3742708A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6914334A FR2044000A5 (fr) 1969-05-14 1969-05-14

Publications (1)

Publication Number Publication Date
US3742708A true US3742708A (en) 1973-07-03

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US00037116A Expired - Lifetime US3742708A (en) 1969-05-14 1970-05-14 Method and means for improving the operation under partial loads of a steam gas plant including a gas turbine and a steam turbine with a steam generator at the downstream end

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US (1) US3742708A (fr)
DE (1) DE2023670A1 (fr)
FR (1) FR2044000A5 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4057966A (en) * 1975-08-12 1977-11-15 Evgeny Nikolaevich Prutkovsky Steam-gas power plant
US4184325A (en) * 1976-12-10 1980-01-22 Sulzer Brothers Limited Plant and process for recovering waste heat
WO2019191671A1 (fr) * 2018-03-29 2019-10-03 XYZ Energy Group, LLC Système et procédé pour la génération de chaleur et d'énergie à l'aide de multiples boucles fermées comprenant une boucle de transfert de chaleur primaire, une boucle de cycle de puissance et une boucle de transfert de chaleur intermédiaire
US11561047B2 (en) 2020-09-28 2023-01-24 XYZ Energy Group, LLC System and method for thermal conversion of materials using multiple loops comprising a primary heat transfer loop, an intermediate heat transfer loop and a thermal conversion circuit

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2652135C2 (de) * 1976-11-16 1983-10-27 Brown, Boveri & Cie Ag, 6800 Mannheim Dampfkraftanlage
DE19853206C1 (de) * 1998-11-18 2000-03-23 Siemens Ag Verfahren zur Kondensatanwärmung in einem Speisewasserbehälter eines Dampfkraftwerkes

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1790154A (en) * 1927-10-28 1931-01-27 Westinghouse Electric & Mfg Co Feed-water heater
US2605610A (en) * 1946-09-03 1952-08-05 Rateau Soc Multiple gas turbine power plant supplying waste heat to an air preheater and a boiler in parallel
US3325992A (en) * 1966-04-26 1967-06-20 Gen Electric Combined steam turbine gas turbine cycle
US3362164A (en) * 1965-10-04 1968-01-09 Babcock & Wilcox Co Start-up system for forced flow vapor generator
US3572036A (en) * 1968-10-21 1971-03-23 Foster Wheeler Corp Vapor generator start-up system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1790154A (en) * 1927-10-28 1931-01-27 Westinghouse Electric & Mfg Co Feed-water heater
US2605610A (en) * 1946-09-03 1952-08-05 Rateau Soc Multiple gas turbine power plant supplying waste heat to an air preheater and a boiler in parallel
US3362164A (en) * 1965-10-04 1968-01-09 Babcock & Wilcox Co Start-up system for forced flow vapor generator
US3325992A (en) * 1966-04-26 1967-06-20 Gen Electric Combined steam turbine gas turbine cycle
US3572036A (en) * 1968-10-21 1971-03-23 Foster Wheeler Corp Vapor generator start-up system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4057966A (en) * 1975-08-12 1977-11-15 Evgeny Nikolaevich Prutkovsky Steam-gas power plant
US4184325A (en) * 1976-12-10 1980-01-22 Sulzer Brothers Limited Plant and process for recovering waste heat
WO2019191671A1 (fr) * 2018-03-29 2019-10-03 XYZ Energy Group, LLC Système et procédé pour la génération de chaleur et d'énergie à l'aide de multiples boucles fermées comprenant une boucle de transfert de chaleur primaire, une boucle de cycle de puissance et une boucle de transfert de chaleur intermédiaire
AU2019245407B2 (en) * 2018-03-29 2020-11-19 XYZ Energy Group, LLC System and method for the generation of heat and power using multiple closed loops comprising a primary heat transfer loop, a power cycle loop and an intermediate heat transfer loop
US11561047B2 (en) 2020-09-28 2023-01-24 XYZ Energy Group, LLC System and method for thermal conversion of materials using multiple loops comprising a primary heat transfer loop, an intermediate heat transfer loop and a thermal conversion circuit

Also Published As

Publication number Publication date
FR2044000A5 (fr) 1971-02-19
DE2023670A1 (de) 1971-02-18

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