EP0586425B1 - Procede de generation d'energie dans une centrale thermique combinee a gaz et a vapeur - Google Patents

Procede de generation d'energie dans une centrale thermique combinee a gaz et a vapeur Download PDF

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Publication number
EP0586425B1
EP0586425B1 EP92910154A EP92910154A EP0586425B1 EP 0586425 B1 EP0586425 B1 EP 0586425B1 EP 92910154 A EP92910154 A EP 92910154A EP 92910154 A EP92910154 A EP 92910154A EP 0586425 B1 EP0586425 B1 EP 0586425B1
Authority
EP
European Patent Office
Prior art keywords
steam
steam generator
gas
power station
turbine
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
EP92910154A
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German (de)
English (en)
Other versions
EP0586425A1 (fr
Inventor
Heinz Spliethoff
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.)
Saarbergwerke AG
Original Assignee
Saarbergwerke AG
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Filing date
Publication date
Application filed by Saarbergwerke AG filed Critical Saarbergwerke AG
Publication of EP0586425A1 publication Critical patent/EP0586425A1/fr
Application granted granted Critical
Publication of EP0586425B1 publication Critical patent/EP0586425B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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

Definitions

  • the invention relates to a combined gas-steam power Plant for the production of energy with a firing chamber having gas turbine cycle and a coal-fired steam turbine circuit, being the gas turbine one with water Heat recovery steam generator system fed from the steam turbine cycle downstream and a connecting line between the steam side exit of the Heat recovery steam generator system and the steam-side outlet of the steam generator is provided.
  • the hot turbine gases for those with increasing Gas turbine development rising gas turbine inlet temperatures are aimed at showing higher ones Temperatures lower oxygen levels. This performs in auxiliary fired steam generators that both the gas turbine exhaust heat as well as that in the gas turbine exhaust contained oxygen for combustion in the Want to use additional firing, so that the hereby Provided oxygen concentration through fresh air must be increased to complete combustion to ensure.
  • the setting and control of the steam temperature is essentially carried out by additional firing directly at the hot end of the heat recovery steam generation system (see FIG. 1 and page 50 bottom left).
  • This additional firing increases the exhaust gas temperature of the gas turbine as a whole, which means that the steam temperature in the superheater can also be influenced, with corresponding effects but also on the heat exchanger surfaces downstream of the superheater in the direction of the cold end.
  • Such a control concept is relatively complex and yet sluggish, since the entire mass flow must be treated in each case.
  • the present invention is based on the object a process for generating energy in one combined gas-steam power plant of the aforementioned Kind both to achieve higher efficiencies than also to further develop availability.
  • this object is achieved by that in the steam-carrying connecting line between the heat recovery steam generator system and the steam generator an additional boiler with its own furnace for adjustment the temperature of the steam flow from the heat recovery steam generator the temperature of the steam flow from the steam generator is integrated.
  • the combined gas-steam power plant according to the invention is characterized by a full firing side Decoupling of the two energy generation cycles out. Compared to the state of the So the hot exhaust gas from the gas turbine does not become technology introduced into the steam generator, but for generation of process steam in its own heat recovery steam generator utilized.
  • the invention is therefore particularly suitable for Retrofitting or expansion of existing steam power plants, since there are no interventions in the firing area of the steam generator or in the flue gas path integrated heat dissipation and gas cleaning systems become necessary.
  • thermodynamic connection of the two energy generation cycles takes place exclusively via the Water-steam cycle.
  • the two in the heat recovery steam generator and high-voltage generated in the steam generator Steam streams are adjusted after their Vapor states, essentially their temperatures, mixed and then in the same steam turbine relaxed working.
  • This also includes the adjustment of the steam flows required additional heat without influencing the furnace of the steam generator and generated in an additional boiler transferred, d. H. it is Z. B. not vorese hen, if the additional heat in an additional firing is generated, the hot flue gases of this additional firing in the combustion output zone of the steam generator initiate.
  • the invention provides for the case of an additional boiler with its own furnace, the hot flue gas flow this furnace either the exhaust gas from the gas turbine before entering the heat recovery steam generator system or also the flue gas from the steam generator behind the Add the firing power zone to then the residual heat either in the heat recovery steam generator itself or in the in the Rauchgsweg of the steam generator integrated heat exchangers. It offers then an admixture to the exhaust gas from the gas turbine if the additional firing with gas or oil as fuel is operated while an admixture to Flue gas flow from the steam generator for one with coal operated auxiliary firing is more likely.
  • the power ratio between the heat recovery steam generator system and the steam generator in the gas-steam power plant operated according to the invention is expediently ⁇ 1, preferably between 1: 1 and 1: 4.
  • the required or desired power ratio of the heat recovery steam generator system to the steam generator can be set by arranging a plurality of gas turbines, the respective heat recovery steam generator systems of which are connected in parallel with respect to the steam flow.
  • the figure shows schematically one according to the invention Processed combined gas-steam power plant.
  • the relaxed working steam in three turbine stages 9, 10 and 11, which are arranged on the same shaft with a generator 12, is condensed in a condenser 13 and conveyed as condensate by means of a pump via preheaters 15 and 16 connected in parallel into a feed water tank 17.
  • the water collected in the feed water tank 17 is pumped to process pressure in a high-pressure pump 18 and then divided into two partial flows.
  • the one partial flow first passes through a line 19 to a heat exchanger 20 heated by extraction steam and is then fed to a coal-fired steam generator system 21, for example it can be the steam generator of an existing coal-fired power plant.
  • a coal-fired steam generator system 21 for example it can be the steam generator of an existing coal-fired power plant.
  • the second partial flow of the pressurized feed water is fed via a line 22 to the heat recovery steam generator system 7 and is evaporated and heated in heating surfaces 23 in heat exchange with the hot exhaust gas from the gas turbine 4.
  • the steam thus obtained, which has not yet been completely overheated, is fed via line 24 to an additional boiler 25 which is gas-heated in this exemplary embodiment and is further heated there by supplying additional heat to the temperature of the superheated steam produced in the steam generator 21.
  • Both partial streams from the auxiliary boiler 25 and the steam generator system 21, now adjusted in their steam states, are mixed with one another and fed to the first stage 9 of the three-stage steam turbine.
  • the partially expanded steam stream is reheated.
  • the steam flow is divided into two partial flows.
  • the intermediate superheating of the one partial flow takes place in heating surfaces 27 within the gas-heated additional boiler 25, while the second partial flow is reheated in an intermediate superheater 28 integrated into the flue gas path of the steam generator.
  • the partial steam flow in the heating surfaces 27 corresponds in quantity to the steam flow flowing out of the heat recovery steam generator system 7 via the line 24.
  • the intermediate superheating of the steam generated in the heat recovery steam generator 7 takes place independently of the heat generation and heat transfer systems of the steam generator 21, so that, for. B. a standstill of the steam generator 21 has no effect on the reheating of the steam from the heat recovery steam generator 7.
  • the still hot flue gas accumulating in the auxiliary boiler 25 is drawn off according to the invention via a line 26, mixed with the hot exhaust gas of the gas turbine 4 flowing in line 6 and cooled together with this in the heat recovery steam generator system 7 and then withdrawn from the system.

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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)

Claims (5)

  1. Installation combinée à gaz et à vapeur pour la production d'énergie, comprenant un circuit de turbine à gaz munie d'une chambre de combustion (3) ainsi qu'un circuit de turbine à vapeur comportant un générateur de vapeur (21) par combustion de charbon, la turbine à gaz 4 étant située en aval d'une installation de génération de vapeur par récupération de la chaleur contenue dans l'eau sortant du circuit de la turbine à vapeur tandis qu'une canalisation relie la sortie, côté vapeur, de l'installation de récupération de la chaleur perdue (7) à la sortie côté vapeur du générateur de vapeur (21),
    caractérisée en ce que
    la conduite de liaison conduisant la vapeur entre l'installation de récupération de la chaleur perdue (7) et le générateur de vapeur (21) intègre une chaudière auxiliaire (25) ayant son propre foyer et destinée à équilibrer la température du courant de vapeur (24) sortant de l'installation de récupération de la chaleur perdue (7) au niveau de la température du courant de vapeur sortant du générateur de vapeur (21).
  2. Installation combinée selon la revendication 1,
    caractérisée en ce que
    la chaudière auxiliaire (25) comporte un foyer utilisant comme combustible du fuel ou du gaz et est relié, côté sortie des fumées, à la sortie de la turbine à gaz.
  3. Installation combinée selon la revendication 1,
    caractérisée en ce que
    la chaudière auxiliaire (25) comporte un foyer à charbon et est reliée, côté sortie des fumées, à la conduite de sortie des fumées du générateur de vapeur (21), en aval de la zone de puissance du foyer.
  4. Installation combinée selon une des revendications 1 à 3, dans laquelle, après un premier étage de détente de la vapeur, il est prévu un nouveau réchauffement intermédiaire de celle-ci,
    caractérisée en ce que
    ce réchauffement intermédiaire est assuré, dans la chaudière auxiliaire (25), par au moins des surfaces d'échange thermique (27) sur au moins un courant partiel de vapeur.
  5. Installation selon la revendication 4,
    caractérisée en ce que
    le courant partiel de vapeur qui subit un réchauffement sur les surfaces d'échange thermique de la chaudière auxiliaire (25) a un débit correspondant à celui du courant de vapeur sortant de l'installation de récupération de la chaleur perdue (7).
EP92910154A 1991-05-25 1992-05-21 Procede de generation d'energie dans une centrale thermique combinee a gaz et a vapeur Expired - Lifetime EP0586425B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4117191 1991-05-25
DE19914117191 DE4117191C2 (de) 1991-05-25 1991-05-25 Kombinierte Gas-Dampfkraftanlage zur Erzeugung von Energie
PCT/DE1992/000414 WO1992021860A1 (fr) 1991-05-25 1992-05-21 Procede de generation d'energie dans une centrale thermique combinee a gaz et a vapeur

Publications (2)

Publication Number Publication Date
EP0586425A1 EP0586425A1 (fr) 1994-03-16
EP0586425B1 true EP0586425B1 (fr) 1998-08-05

Family

ID=6432471

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92910154A Expired - Lifetime EP0586425B1 (fr) 1991-05-25 1992-05-21 Procede de generation d'energie dans une centrale thermique combinee a gaz et a vapeur

Country Status (6)

Country Link
EP (1) EP0586425B1 (fr)
AU (1) AU1694692A (fr)
DE (2) DE4117191C2 (fr)
DK (1) DK0586425T3 (fr)
ES (1) ES2121013T3 (fr)
WO (1) WO1992021860A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012012683A1 (de) * 2012-06-27 2014-01-02 RERUM COGNITIO Institut GmbH Kombinierter Gas- und Dampfturbinenprozess mit erhöhter Leistung und verbesserter Effizienz durch zusätzliche Hochtemperatur-Zwischenüberhitzung für die Elektroenergieerzeugung im Kreisprozess

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2116136B1 (es) * 1993-05-03 1998-12-16 Rosado Serafin Luis Mendoza Procedimiento de mejora de la combinacion entre una turbina de gas y un ciclo de vapor con otra fuente no fosil de energia primaria.
ES2116139B1 (es) * 1993-05-14 1999-04-16 Rosado Serafin Mendoza Perfeccionamientos introducidos en la patente de invencion n- 9301044 titulada un procedimiento de mejora para centrales electricas de ciclo combinado con aporte paralelo de energia al ciclo de vapor en una caldera de combustible fosil.
ES2116137B1 (es) * 1993-05-14 1999-04-16 Rosado Serafin Mendoza Un procedimiento de mejora para centrales electricas de ciclo combinado con aporte de energia al ciclo de vapor en una caldera de combustible fosil.
GB2390121B (en) * 2000-01-19 2004-08-04 Alstom Combined cycle power plant
DE10001995A1 (de) 2000-01-19 2001-07-26 Alstom Power Schweiz Ag Baden Verfahren zur Einstellung bzw. Regelung der Dampftemperatur des Frischdampfes und/oder Zwischenüberhitzerdampfers in einem Verbundkraftwerk sowie Verbundkraftwerk zur Durchführung des Verfahrens
IT1402363B1 (it) * 2010-06-10 2013-09-04 Turboden Srl Impianto orc con sistema per migliorare lo scambio termico tra sorgente di fluido caldo e fluido di lavoro
DE102011102929A1 (de) * 2011-05-31 2012-12-06 Linde Aktiengesellschaft Verfahren und Vorrichtung zur Produktion von überhitztem Dampf

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3118429A (en) * 1961-11-08 1964-01-21 Combustion Eng Power plant in which single cycle gas turbine operates in parallel with direct fired steam generator
DE2512774C2 (de) * 1975-03-22 1982-09-02 Brown, Boveri & Cie Ag, 6800 Mannheim Kombinierte Gas-Dampfturbinenanlage
CH645433A5 (de) * 1980-04-11 1984-09-28 Sulzer Ag Kombinierte gasturbinen-dampfkraftanlage.
DE3815536C1 (en) * 1988-05-06 1989-07-20 Wolff Walsrode Ag, 3030 Walsrode, De Heating and power station and method for generating heat energy in the form of steam and generating electrical energy
DE3926964A1 (de) * 1989-08-16 1991-02-21 Siemens Ag Verfahren zur minderung des kohlendioxidgehalts des abgases eines gas- und dampfturbinenkraftwerks und danach arbeitendes kraftwerk

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012012683A1 (de) * 2012-06-27 2014-01-02 RERUM COGNITIO Institut GmbH Kombinierter Gas- und Dampfturbinenprozess mit erhöhter Leistung und verbesserter Effizienz durch zusätzliche Hochtemperatur-Zwischenüberhitzung für die Elektroenergieerzeugung im Kreisprozess

Also Published As

Publication number Publication date
EP0586425A1 (fr) 1994-03-16
DK0586425T3 (da) 1999-05-03
WO1992021860A1 (fr) 1992-12-10
DE4117191A1 (de) 1992-12-03
DE59209451D1 (de) 1998-09-10
ES2121013T3 (es) 1998-11-16
AU1694692A (en) 1993-01-08
DE4117191C2 (de) 1994-11-24

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