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EP0919767B1 - Centrale combinée gaz-vapeur avec un générateur de vapeur à passage unique - Google Patents

Centrale combinée gaz-vapeur avec un générateur de vapeur à passage unique Download PDF

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Publication number
EP0919767B1
EP0919767B1 EP19970810932 EP97810932A EP0919767B1 EP 0919767 B1 EP0919767 B1 EP 0919767B1 EP 19970810932 EP19970810932 EP 19970810932 EP 97810932 A EP97810932 A EP 97810932A EP 0919767 B1 EP0919767 B1 EP 0919767B1
Authority
EP
European Patent Office
Prior art keywords
steam
water
evaporator
bottle
once
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
EP19970810932
Other languages
German (de)
English (en)
Other versions
EP0919767A1 (fr
Inventor
Erhard Dr. Liebig
Friedrich Pietzonka
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.)
Alstom SA
Original Assignee
Alstom 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 Alstom SA filed Critical Alstom SA
Priority to DE59707431T priority Critical patent/DE59707431D1/de
Priority to EP19970810932 priority patent/EP0919767B1/fr
Publication of EP0919767A1 publication Critical patent/EP0919767A1/fr
Application granted granted Critical
Publication of EP0919767B1 publication Critical patent/EP0919767B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22G—SUPERHEATING OF STEAM
    • F22G3/00—Steam superheaters characterised by constructional features; Details or component parts thereof
    • F22G3/003—Superheater drain arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
    • F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
    • F22B1/1807—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines using the exhaust gases of combustion engines
    • F22B1/1815—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines using the exhaust gases of combustion engines using the exhaust gases of gas-turbines

Definitions

  • the invention relates to a combined gas-steam power plant with one Gas turbine cycle and a steam turbine cycle in which the exhaust gases one Gas turbine its residual heat via that in a once-through steam generator Deliver flowing working fluid to a steam turbine, in the once-through steam generator a separator bottle between the evaporator and the superheater for separating water and for removing impurities is arranged, for which the outlet header of the evaporator with the upper part of the separator bottle is connected via a steam line.
  • the water vapor cycle of the current combined systems is used without exception driven subcritical parameters.
  • the waste heat boiler to use the waste heat The gas turbine is usually equipped with a drum boiler, with a once-through boiler or with combinations thereof. For large, highly efficient systems In some cases, multi-pressure systems with reheating are used. Compared to conventionally fired boilers, however, is the flue gas temperature limited for waste heat boilers. In particular the evaporation, which at constant temperature, leads to thermodynamic and technical Design constraints.
  • this separator bottle can be cleaned of the water-steam cycle, in which the impurities can be removed from the bottle like a drum kettle. To do this, the separator bottle must be operated under certain conditions become.
  • the separator bottles are used in particular for Removal of moisture or water from the evaporator outlet arises. They serve to protect the turbine from moisture breakthroughs, such as especially when starting up the system, under light loads and with transients Operating conditions can occur.
  • At the exit of the evaporator i.e. in its outlet collector, can be in the following In cases where there is water or accumulate: On the one hand when starting the System with recirculation of water through the separator bottle; to change during normal operation, when supercooled water drops in the slightly overheated steam get carried away; continue at low partial loads, at which at the evaporator outlet a wet steam condition prevails; finally in the case of transients with the Consequence of overfeeding the evaporator system. These water accumulations in the outlet collector are undesirable.
  • the lower heating surface areas can be supported fill with water due to the geodetic height difference. This can reduce the evaporator stability affect and reduce steam production to lead. In addition, in the lower heating area with water / steam blows due to water flowing back.
  • the invention has for its object in a heat recovery steam generator type mentioned above to create a measure that the water-side Ensures that the evaporator outlet collector is emptied.
  • the advantages of the invention include, among other things, system-inherent emptying of the evaporator outlet collector. On the previous equipment, metrological and control engineering effort that was required to to prevent water accumulation around the accumulated water can now be dispensed with.
  • suction is drawn in via a line 1 in the gas turbine system
  • Fresh air in a compressor 2 is compressed to the working pressure.
  • the condensed Air becomes strong in a combustion chamber 3 fired with natural gas, for example heated and the resulting fuel gas is working in a gas turbine 4 relaxed.
  • the energy obtained in this way is sent to a generator 5 or delivered the compressor 2.
  • the still hot exhaust gas from the gas turbine is over a line 6 from the outlet of the gas turbine of a heat recovery steam generator 7 supplied and from it after releasing its heat via a line 8 and directed a fireplace, not shown, to the outside.
  • the water-steam circuit is a multi-casing steam turbine 9, 10 on the same shaft arranged with the gas turbine.
  • the one in the low pressure turbine 10 expanded working steam condenses in a condenser 11.
  • the condensate is transferred from the hotwell 12 directly into the steam generator 7 by means of a pump 20 promoted. It is noteworthy that the system does not have a condensate cleaning system still with a steam-heated feed water tank / degasser is equipped.
  • the heat recovery steam generator 7 is designed as a horizontal boiler and works in the present case after an indentation steam process.
  • the number of Pressure levels are irrelevant in the example.
  • the impression system is designed as a forced flow system and therefore both can be designed for subcritical as well as for supercritical parameters. It consists in Flue gas path of the boiler essentially from the economizer 21, the evaporator 22 and the superheater 23. The superheated steam is fed through a live steam line 24 transferred to the high pressure part 9 of the steam turbine.
  • the three Heat exchange surfaces 21, 22 and 23 are each with an inlet header 21a, 22a, 23a and an outlet collector 21b, 22b and 23b.
  • a separating bottle 25 is provided in the system for phase separation the upper part of the outlet header 22b of the evaporator 22 via a line 31 opens.
  • the separation bottle is at its upper end via a line 32 connected to the inlet header 23a of the superheater 23.
  • On hers the lower end of the bottle is provided with a return line 29, which in the Hotwell 12 flows.
  • At the bottom of the bottle is an additional one Provide drain pipe 30 through which the contaminants are drawn off become. The amount withdrawn there is replaced by make-up water, which is entered into the capacitor at 13.
  • the separator bottle ensures that the superheater stays dry at all times overheated steam is available at the boiler outlet at an early stage. As soon as High pressure evaporator 22 reaches the pressure required for stable operation the live steam can be used to start the steam turbine in sliding pressure mode be used.
  • the separating bottle 25 is driven dry in normal operation. For cleaning the steam / water cycle is a larger via the feed pump 20 Amount of water as required by the once-through steam generator promoted. The amount of water delivered is set so that in any case Wet steam enters bottle 25. In the water droplets of the water-steam mixture the impurities are bound. In the bottle the Water content of the steam separated by suitable means and over the Drain line 30 removed. For cleaning what is done at full load wet steam must get into the bottle.
  • a measure should now be created that ensures the evacuation of the evaporator outlet header 22b at all possible operating conditions.
  • This Connection may be a small diameter water pipe 33 which connects the lower water areas of the two apparatuses 22b and 25 to one another. In certain cases, this water line 33 can also enter the steam room of the apparatus 25 are performed, but this is significantly below the Steam introduction should happen. This water pipe inherently takes place Emptying the outlet collector without any regulations and Pumps are required.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)

Claims (2)

  1. Centrale combinée gaz-vapeur avec un circuit de turbine à gaz et un circuit de turbine à vapeur, dans laquelle les gaz d'échappement d'une turbine à gaz (4) diffusent leur chaleur résiduelle, par l'intermédiaire du fluide de travail s'écoulant dans un générateur de vapeur à circulation forcée (7), à une turbine à vapeur (9, 10), un cylindre de séparation (25) étant disposé dans le générateur de vapeur à circulation forcée entre l'évaporateur (22) et le surchauffeur (23) pour la séparation de l'eau et l'élimination des boues provenant d'impuretés, le collecteur de sortie (22b) de l'évaporateur (22) étant à cet effet connecté à la partie supérieure du cylindre de séparation (25) par l'intermédiaire d'une conduite pour la vapeur (31), caractérisée en ce que le collecteur de sortie (22b) de l'évaporateur (22) est connecté à la partie inférieure du cylindre de séparation (25) par l'intermédiaire d'une conduite pour l'eau (33).
  2. Centrale selon la revendication 1, caractérisée en ce qu'un élément d'étranglement (28) est disposé dans la conduite pour la vapeur (31) allant du collecteur de sortie (22b) au cylindre de séparation (25).
EP19970810932 1997-12-01 1997-12-01 Centrale combinée gaz-vapeur avec un générateur de vapeur à passage unique Expired - Lifetime EP0919767B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE59707431T DE59707431D1 (de) 1997-12-01 1997-12-01 Kombinierte Gas-Dampf-Kraftwerksanlage mit Zwangdurchlaufdampferzeuger
EP19970810932 EP0919767B1 (fr) 1997-12-01 1997-12-01 Centrale combinée gaz-vapeur avec un générateur de vapeur à passage unique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19970810932 EP0919767B1 (fr) 1997-12-01 1997-12-01 Centrale combinée gaz-vapeur avec un générateur de vapeur à passage unique

Publications (2)

Publication Number Publication Date
EP0919767A1 EP0919767A1 (fr) 1999-06-02
EP0919767B1 true EP0919767B1 (fr) 2002-06-05

Family

ID=8230501

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19970810932 Expired - Lifetime EP0919767B1 (fr) 1997-12-01 1997-12-01 Centrale combinée gaz-vapeur avec un générateur de vapeur à passage unique

Country Status (2)

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EP (1) EP0919767B1 (fr)
DE (1) DE59707431D1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1701090A1 (fr) * 2005-02-16 2006-09-13 Siemens Aktiengesellschaft Générateur de vapeur à construction horizontale
US11199112B2 (en) * 2017-08-18 2021-12-14 Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno Method and system for heat recovery
EP3444529A1 (fr) * 2017-08-18 2019-02-20 Nederlandse Organisatie voor toegepast- natuurwetenschappelijk onderzoek TNO Procédé et système de récupération de chaleur

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3216588C1 (de) * 1982-05-04 1983-11-03 Evt Energie- Und Verfahrenstechnik Gmbh, 7000 Stuttgart Einrichtung zur Entwaesserung der UEberhitzerheizflaechen eines Dampferzeugers
AT394100B (de) * 1988-09-14 1992-01-27 Sgp Va Energie Umwelt Abhitze-dampferzeuger
DE59300573D1 (de) * 1992-03-16 1995-10-19 Siemens Ag Verfahren zum Betreiben einer Anlage zur Dampferzeugung und Dampferzeugeranlage.
DE19544225A1 (de) * 1995-11-28 1997-06-05 Asea Brown Boveri Reinigung des Wasser-Dampfkreislaufs in einem Zwangsdurchlauferzeuger

Also Published As

Publication number Publication date
DE59707431D1 (de) 2002-07-11
EP0919767A1 (fr) 1999-06-02

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