WO1998032954A1 - Installation combinee de turbines a gaz et a vapeur et son procede de fonctionnement - Google Patents

Installation combinee de turbines a gaz et a vapeur et son procede de fonctionnement Download PDF

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Publication number
WO1998032954A1
WO1998032954A1 PCT/DE1998/000114 DE9800114W WO9832954A1 WO 1998032954 A1 WO1998032954 A1 WO 1998032954A1 DE 9800114 W DE9800114 W DE 9800114W WO 9832954 A1 WO9832954 A1 WO 9832954A1
Authority
WO
WIPO (PCT)
Prior art keywords
turbine
steam
pressure
gas
waste heat
Prior art date
Application number
PCT/DE1998/000114
Other languages
German (de)
English (en)
Inventor
Bernard Becker
Original Assignee
Siemens Aktiengesellschaft
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 Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO1998032954A1 publication Critical patent/WO1998032954A1/fr

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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
    • 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
    • F01K23/106—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 water evaporated or preheated at different pressures in exhaust boiler
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
    • F02C6/18—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use using the waste heat of gas-turbine plants outside the plants themselves, e.g. gas-turbine power heat plants
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
    • F02C7/12—Cooling of plants
    • F02C7/16—Cooling of plants characterised by cooling medium
    • F02C7/18—Cooling of plants characterised by cooling medium the medium being gaseous, e.g. air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2260/00—Function
    • F05D2260/20—Heat transfer, e.g. cooling
    • F05D2260/232—Heat transfer, e.g. cooling characterized by the cooling medium
    • F05D2260/2322—Heat transfer, e.g. cooling characterized by the cooling medium steam
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2260/00—Function
    • F05D2260/60—Fluid transfer
    • F05D2260/601—Fluid transfer using an ejector or a jet pump
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]

Definitions

  • the invention relates to a combined gas and steam turbine system with a gas turbine, a steam turbine and a waste heat boiler and a method for operating such a combined gas and steam turbine system.
  • EP 0436536 B1 describes a method for operating a steam turbine which has at least one medium-pressure part and one high-pressure part.
  • Hot steam for driving the steam turbine is generated with the aid of a waste heat steam generator through which a hot gas, in particular the hot exhaust gas of a gas turbine system, flows.
  • the waste heat steam generator has different sections for generating steam of different pressure and temperature levels.
  • the gas turbine system and the steam turbine system are each arranged on their own turbine shaft and with a respective one
  • the superheated steam at the highest pressure and temperature is fed to the high-pressure turbine section.
  • the steam released therein is in turn fed to the waste heat steam generator, reheated in it and fed to a medium-pressure part of the steam turbine.
  • the steam released therein is combined with steam from the waste heat steam generator at lower pressure and temperature levels and fed into the low-pressure turbine section.
  • the object of the invention is a combined gas and
  • Another object of the invention is to provide a method for operating such a combined gas and steam turbine plant.
  • the object directed to a system according to the preamble of claim 1 is achieved in that the gas turbine has at least one component which can be cooled with cooling steam and which is connected to the steam turbine and / or the waste heat boiler for cooling steam introduction and to a jet mixer for cooling steam discharge.
  • the jet mixer has a jet inlet for feeding hot steam, a jet outlet and a cooling steam inlet connected to the gas turbine, the jet outlet being connected to the steam turbine.
  • cooling steam from the gas turbine By mixing cooling steam from the gas turbine into hot steam, which is preferably discharged from the waste heat boiler, into a jet mixer, the cooling steam is effectively mixed into the hot steam.
  • the resulting steam mixture has a significantly higher pressure than the cooling steam.
  • the steam mixture thus permits feeding into the steam turbine with a particularly high degree of efficiency. The losses resulting from cooling the component or components of the gas turbine are thus reduced, viewed over the entire steam process.
  • the jet inlet of the jet mixer is preferably connected to the waste heat boiler and / or a high-pressure sub-turbine of the steam turbine, in particular to the outlet of the high-pressure sub-turbine. This ensures a high pressure of the steam mixture formed from cooling steam and superheated steam in the jet mixer.
  • the jet outlet of the jet mixer is preferably connected to a medium-pressure partial turbine and / or a low-pressure partial turbine of the steam turbine, in particular to the inlet for steam of the medium-pressure turbine and / or at a point of lower pressure.
  • An alternative embodiment of the invention is that the cooling steam emerging from the gas turbine immediately, that is, without mixing, is fed into a low-pressure sub-turbine or into a medium-pressure sub-turbine, depending on the prevailing pressure of the cooling steam, via a corresponding line.
  • the cooling steam is thus fed into the steam turbine at a suitable pressure level without additional pressure losses.
  • the turbine shaft of the gas turbine is preferably designed for cooling with cooling steam, the cooling steam of the turbine shaft being introduced into this and being led out of it again.
  • the housing of the gas turbine can also be designed in such a way that it can be flowed through for the purpose of cooling cooling steam from the high-pressure sub-turbine.
  • the combined gas and steam turbine system preferably has a single turbine shaft, which may be constructed from a plurality of shaft strands coupled to one another.
  • the turbine shaft extends over the gas turbine with a compressor and the steam turbine and is preferably connected to one or more generators. It is also possible to provide a separate turbine shaft for the gas turbine and the steam turbine.
  • a jet mixer for increasing the cooling steam of the gas turbine is arranged in a supply of cooling steam to the gas turbine.
  • the jet mixer has a jet inlet for feeding hot steam, a jet outlet for supplying the cooling steam to the gas turbine and a steam inlet for supplying steam of lower pressure than at the jet inlet.
  • the steam inlet is preferably connected to a steam outlet of a high-pressure sub-turbine and / or a high-pressure section of lower pressure of the waste heat boiler.
  • a cooling steam generated by the jet mixer can still have a pressure of high levels after flowing through the gas turbine with the pressure loss occurring, in particular a pressure which is essentially the pressure of in one Medium pressure partial turbine corresponds to incoming steam.
  • a return of cooling steam is preferably provided, which opens into the inflow region of a medium-pressure partial turbine of the steam turbine.
  • the method for operating a combined gas and steam turbine system with a gas turbine, a steam turbine comprising a high-pressure sub-turbine and a medium-pressure sub-turbine and / or a low-pressure sub-turbine and with a waste heat boiler is achieved in that the gas turbine of cooling steam is fed to the high-pressure sub-turbine or the waste heat boiler and the cooling steam leaving the gas turbine with a pressure loss is mixed into a jet of superheated steam at higher pressure and the steam of the steam turbine mixed in this way, in particular the medium-pressure sub-turbine and / or the low-pressure sub-turbine is fed.
  • all or part of this cooling steam leaving the gas turbine is immediately, i.e. without mixing with a superheated steam, fed back to the steam turbine.
  • the cooling steam of the gas turbine can be increased by using high pressure steam from the waste heat boiler with steam of lower pressure, e.g. Evaporation of the high-pressure turbine and / or steam for inflow into a medium-pressure turbine is mixed. After cooling the gas turbine, the steam can have the pressure level of the steam flowing into the medium-pressure sub-turbine.
  • 3 and 4 are each a schematic of a combined gas
  • FIG. 1 shows a schematic illustration of a combined gas and steam turbine system with a gas turbine 1, a steam turbine 2 and a generator 17, which are arranged on a single shaft 4, optionally composed of several shaft segments.
  • the steam turbine 2 comprises a high-pressure sub-turbine 12a and, schematically illustrated in a housing, a medium-pressure sub-turbine 12b and a low-pressure sub-turbine 12c.
  • the gas turbine system comprises the actual gas turbine 1, a compressor 15 and a combustion chamber 16 arranged in terms of flow between the compressor 15 and the gas turbine 1.
  • the gas turbine 1 is connected on the outlet side to a waste heat boiler 3 for generating superheated steam for operating the steam turbine 2.
  • the waste heat boiler 3 has sections, not shown, of different pressure levels, with a high-pressure section on the inlet side with the high-pressure sub-turbine 12a, a further high-pressure section on the inlet side with the medium-pressure sub-turbine 12b and a low-pressure section on the inlet side with the
  • Low pressure turbine part 12c is connected.
  • a jet mixer 5 (see FIG. 2) is arranged in a connection between the waste heat boiler 3 and the medium-pressure turbine section 12b.
  • the gas turbine 1 has the turbine shaft 4a and a housing 4b.
  • the guidance of cooling steam 6 in the turbine shaft 4a and not shown the housing 4b is connected on the inlet side to the steam outlet 19 of the high-pressure turbine section 12a.
  • the respective cooling steam guide of the gas turbine 1 opens into the jet mixer 5.
  • This jet mixer 5 shown schematically in a longitudinal section in FIG. 2, is directed along a main axis 14 and is essentially symmetrical to it. It has a beam inlet 7 for superheated steam 8 (see FIG. 1), directed along the main axis 18 and surrounding it, from the waste heat boiler 3.
  • the jet inlet 7 is surrounded by an annular channel 20, not shown, which tapers in the direction of flow of the superheated steam 8.
  • a cooling steam inlet 10 opens into the annular channel 20, through which cooling steam 6 can be introduced into the jet mixer 5 substantially perpendicular to the direction of flow of the superheated steam 8.
  • the tapered ring channel 20 merges into a beam outlet 9 directed along the main axis 18.
  • the cooling steam 6 flowing through the gas turbine 1 experiences a pressure loss in the gas turbine 1 and is mixed in the jet mixer 5 with superheated steam 8 from the waste heat boiler 3 at a higher pressure.
  • the jet mixer 5 is designed like a jet pump, the superheated steam 8 flowing in the direction of the main axis 18 sucking in and mixing with the cooling steam 6, the resulting mixed steam 14
  • the pressure of the superheated steam 8 can be, for example, 50% to 150% above the pressure of the cooling steam 6, wherein the pressure of the mixed steam 14 can be, for example, 25% to 75% above the pressure of the cooling steam 6.
  • the pressure of the cooling steam 6 is, for example, 15 bar
  • the pressure of the superheated steam 8 is approximately 30 bar
  • the pressure of the mixed steam 14 is approximately 20 bar.
  • FIG. 3 shows a schematic illustration of a gas and steam turbine plant similar to the illustration according to FIG. 1, however, the cooling steam 6 emerging from the gas turbine 1 is fed directly to the medium-pressure sub-turbine 12b or the low-pressure sub-turbine 12c at a corresponding pressure level without admixing further steam, in particular superheated steam.
  • a gas and steam turbine plant similar to the gas and steam turbine plant shown in FIGS. 1 and 3 is shown schematically and in detail in FIG.
  • a jet mixer 5 is arranged therein, analogous to the jet mixer according to FIG. 2, in the supply of cooling steam 6 of the gas turbine 1 upstream of the gas turbine. With the jet inlet 7, the jet mixer 5 is connected to a high-pressure section of the waste heat boiler 3.
  • the jet outlet 9 is connected to the gas turbine 1 by a coolant guide (not shown in more detail).
  • the steam inlet 10 is connected to the steam outlet 19 of the high-pressure sub-turbine 12a and to a high-pressure section of the waste heat boiler 3, not shown, which serves to supply high-pressure steam to the medium-pressure sub-turbine 12b.
  • the cooling steam 6 emerging from the jet mixer 5 therefore has an increased pressure level and, after flowing through the
  • the invention is characterized in that cooling steam used for cooling one or more components of the gas turbine is fed back to the steam turbine.
  • This cooling steam leaving the gas turbine is preferably admixed with a superheated steam in a jet mixer acting as a jet pump, which steam is removed in particular from a high-pressure section of the waste heat boiler.
  • a jet mixer can alternatively or additionally be used to increase the pressure of the cooling steam.

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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)

Abstract

L'invention concerne une installation combinée de turbines à gaz et à vapeur comportant une turbine à gaz (1), une turbine à vapeur (2) et une chaudière de récupération (3). La turbine à gaz (1) comprend un élément (4a, 4b) qui est refroidi avec de la vapeur froide (6) et est relié à la turbine (2) et/ou à la chaudière de récupération (3) en vue de l'injection de la vapeur froide. La turbine à gaz (1) est reliée à un agitateur à jet (5) pour l'évacuation de la vapeur froide, cet agitateur possédant un orifice d'entrée de jet (7) pour l'injection de vapeur chaude (8), un orifice de sortie de jet (9) et une arrivée de vapeur froide (10) reliée à la turbine à gaz (1). L'orifice de sortie de jet (9) est relié à la turbine à vapeur (2). L'invention concerne également un procédé pour le fonctionnement d'une installation combinée de turbines à gaz et à vapeur.
PCT/DE1998/000114 1997-01-27 1998-01-14 Installation combinee de turbines a gaz et a vapeur et son procede de fonctionnement WO1998032954A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19702830.6 1997-01-27
DE1997102830 DE19702830C1 (de) 1997-01-27 1997-01-27 Kombinierte Gas- und Dampfturbinenanlage sowie Verfahren zu deren Betrieb

Publications (1)

Publication Number Publication Date
WO1998032954A1 true WO1998032954A1 (fr) 1998-07-30

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ID=7818455

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1998/000114 WO1998032954A1 (fr) 1997-01-27 1998-01-14 Installation combinee de turbines a gaz et a vapeur et son procede de fonctionnement

Country Status (4)

Country Link
AR (1) AR010879A1 (fr)
DE (1) DE19702830C1 (fr)
TW (1) TW345607B (fr)
WO (1) WO1998032954A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003518223A (ja) * 1999-12-21 2003-06-03 シーメンス アクチエンゲゼルシヤフト 蒸気タービンの運転方法並びにその方法で運転される蒸気タービンを備えたタービン設備
FR2963807B1 (fr) * 2010-08-16 2013-02-22 Christian Blaise Mapella Dispositif compact de production de vapeur a combustion externe, fonctionnant en cycle ferme auto-alimente generant une force de travail destinee a produire de l'electricite
EP2957731A1 (fr) * 2014-06-18 2015-12-23 Alstom Technology Ltd Procédé pour augmenter la puissance d'une centrale électrique à cycle combiné et centrale électrique à cycle combiné pour l'exécution et la réalisation de ce procédé
KR101902088B1 (ko) * 2014-08-27 2018-09-27 지멘스 악티엔게젤샤프트 지역 난방 발전소

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0062932A1 (fr) * 1981-04-03 1982-10-20 BBC Aktiengesellschaft Brown, Boveri & Cie. Centrale combinée de turbines à gaz et à vapeur
EP0736669A2 (fr) * 1995-04-05 1996-10-09 General Electric Company Turbine à gaz refroidi à la vapeur
EP0743425A1 (fr) * 1995-05-16 1996-11-20 General Electric Company Cycle combiné avec turbine à gaz refroidie par de la vapeur

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3804605A1 (de) * 1988-02-12 1989-08-24 Siemens Ag Verfahren und anlage zur abhitzedampferzeugung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0062932A1 (fr) * 1981-04-03 1982-10-20 BBC Aktiengesellschaft Brown, Boveri & Cie. Centrale combinée de turbines à gaz et à vapeur
EP0736669A2 (fr) * 1995-04-05 1996-10-09 General Electric Company Turbine à gaz refroidi à la vapeur
EP0743425A1 (fr) * 1995-05-16 1996-11-20 General Electric Company Cycle combiné avec turbine à gaz refroidie par de la vapeur

Also Published As

Publication number Publication date
AR010879A1 (es) 2000-07-12
DE19702830C1 (de) 1998-05-14
TW345607B (en) 1998-11-21

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