EP1275820A1 - Turbine à gaz et sa méthode d'opération - Google Patents

Turbine à gaz et sa méthode d'opération Download PDF

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Publication number
EP1275820A1
EP1275820A1 EP02405518A EP02405518A EP1275820A1 EP 1275820 A1 EP1275820 A1 EP 1275820A1 EP 02405518 A EP02405518 A EP 02405518A EP 02405518 A EP02405518 A EP 02405518A EP 1275820 A1 EP1275820 A1 EP 1275820A1
Authority
EP
European Patent Office
Prior art keywords
wall
exhaust gas
gas turbine
feed water
fresh air
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.)
Granted
Application number
EP02405518A
Other languages
German (de)
English (en)
Other versions
EP1275820B1 (fr
Inventor
Klaus DÖBBELING
Hans-Erik Hansson
Dieter Winkler
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.)
General Electric Technology GmbH
Original Assignee
Alstom Schweiz AG
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Filing date
Publication date
Application filed by Alstom Schweiz AG filed Critical Alstom Schweiz AG
Publication of EP1275820A1 publication Critical patent/EP1275820A1/fr
Application granted granted Critical
Publication of EP1275820B1 publication Critical patent/EP1275820B1/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
    • F01K21/00—Steam engine plants not otherwise provided for
    • F01K21/04—Steam engine plants not otherwise provided for using mixtures of steam and gas; Plants generating or heating steam by bringing water or steam into direct contact with hot gas
    • F01K21/047—Steam engine plants not otherwise provided for using mixtures of steam and gas; Plants generating or heating steam by bringing water or steam into direct contact with hot gas having at least one combustion gas turbine

Definitions

  • the invention relates to a method for operating a gas turbine system with the Features of the preamble of claim 1.
  • the invention also relates a gas turbine plant with the features of the preamble of claim 6.
  • the invention further relates to the use of a trickle film or Thin film evaporator.
  • a gas turbine system is known from WO 98/01658, which is a gas turbine with steam feed, several heat exchangers for heat recovery from the exhaust gas of the gas turbine, an evaporator or humidifier to generate the water vapor and a compressor to generate compressed fresh air.
  • the compressor gets compressed fresh air removed and via several heat exchangers of the humidification device fed.
  • This humidifier is also heated Feed water supplied, which evaporates and together with the compressed Fresh air forms a water vapor-air mixture.
  • This water vapor-air mixture is returned via one or more heat exchangers and upstream the gas turbine, in particular upstream of the associated combustion chamber, fed.
  • the heating of the feed water and the overheating of the Steam-air mixture takes place in heat exchangers, which are from the exhaust gas be applied to the gas turbine.
  • These heat exchangers form one Device for heat recovery from the exhaust gas.
  • that can Exhaust gas also for preheating the feed water in another Heat exchangers are used.
  • the overall efficiency of such Gas turbine plant depends in particular on how much thermal energy the Exhaust gas emerging from the gas turbine can be extracted.
  • a device is known from EP 0 843 083, with the aid of which a liquid Fuel is processed by means of a purge gas so that the liquid Fuel in terms of volumetric calorific value to a gaseous one Align fuel.
  • This device contains a for this purpose Evaporator tube, which consists of a good heat-conducting material and with a heater interacts.
  • the liquid fuel is so in the evaporator tube is introduced above, which he along the inner surface of the Evaporator tube runs off and forms a relatively thin film. Through the Heating the evaporator tube can easily evaporate the fuel film.
  • the purge gas is introduced into the evaporator tube from below, so that this mixes with the fuel vapor; at the same time this will the fuel is transported away. In this way the density of the fuel-purge gas mixture set so that the desired volumetric Calorific value results.
  • Such a device can also be called a "falling film or Thin film evaporators "are referred to.
  • the invention as characterized in the claims, deals with the problem, for a gas turbine plant and for an associated one Operating method of the type mentioned to specify an embodiment, which enables an increased overall efficiency for the gas turbine plant.
  • this problem is solved by a method with the features of claim 1 and by a gas turbine system with the features of Claim 6 solved.
  • the problem underlying the invention becomes also solved by use with the features of claim 14.
  • Advantageous embodiments are in the dependent claims played.
  • An improvement in the evaporation effect can be achieved that the fresh air and the exhaust gas the wall on which the feed water expires, act on the counterflow principle.
  • the feed water can be used in a first heat exchanger fresh air compressed in the compressor and thereby heated in the Heat exchange stand.
  • the feed water can a second heat exchanger with the exhaust in heat transfer Connected, that already through the falling film or thin film evaporation has cooled down.
  • At least one of the called heat exchanger an integral unit with the falling film or Form thin film evaporators, thereby avoiding line losses can.
  • FIG. 1 shows a highly simplified schematic diagram of a Gas turbine plant according to the invention.
  • a gas turbine system 1 has a Compressor 2, the input 3 with fresh air 4, for. B. from the area, is supplied.
  • the compressor 2 compresses the fresh air, so that compressed at an outlet 5 of the compressor 2 Fresh air 6 exits.
  • the majority of the compressed fresh air 6 becomes one Combustion chamber 7 of the gas turbine system 1 supplied in the conventional Way a combustion of a common fuel 40, in particular natural gas, is carried out.
  • hot and hot emerge from the combustion chamber 7 highly compressed exhaust gases 8 from an inlet 9 of a gas turbine 10 Gas turbine system 1 are supplied. These are in the gas turbine 10 Exhaust gases relaxed, so that at an outlet 11 of the gas turbine 10 relaxed, hot exhaust gases 12 escape.
  • the energy released in the gas turbine 10 is essentially for driving the compressor 2 and for driving a Consumer, in particular a generator used to generate electricity 13 used.
  • the gas turbine system 1 is also modern with a trickle film Thin film evaporator 14 equipped, which is an integral unit from a Evaporation device and an exhaust gas heat recovery device forms.
  • the falling film or thin film evaporator 14 has a housing 15, a water inlet 16 for feed water 17, an air inlet 18 for compressed fresh air 6 or 19, an exhaust gas inlet 20 for the hot exhaust gas 12, a steam outlet 21 for superheated steam or for superheated Steam-air mixture 22, an exhaust gas outlet 23 for cooled exhaust gas 24, an additional input 25 for preheating feed water 26 and one Has additional output 27 for preheated feed water 28.
  • the housing 15 contains an evaporation line arrangement 29 which for example from a plurality of tubes 30 running parallel to one another is formed and in a marked by a curly bracket 31 Evaporator section of the housing 15 is arranged.
  • the Evaporation line assembly 29 is at the top of each tube 30 at 32 via the water inlet 16 with the feed water to be evaporated 17 supplied.
  • the feed water 17 is guided so that it is inside the Tubes 30 runs on their wall surfaces and forms a film thereon in particular can be thinner than 1 mm.
  • the tubes 30 and the Evaporation line arrangement 29 thus contain in the evaporator section 31 a wall 39 symbolically marked with a continuous line, along which the feed water 17 to be evaporated runs off.
  • the evaporation line arrangement 29 is via the air inlet 18 at 33, thus supplied with compressed fresh air 6 or 19 below, as a result of which the pipes 30 fresh air is applied inside. Is accordingly also the feed water running on said wall 39 with the Fresh air applied.
  • Fresh air 6 becomes a partial flow 38 of the fresh air 6 after the compressor 2 diverted. It is also possible to use the fresh air required for evaporation to branch off at another point of the compressor 2.
  • first heat exchanger 34 provided, the 38 with respect to the branched, compressed fresh air upstream of the air inlet 18 and upstream of the feed water Water inlet 16 is arranged.
  • This first heat exchanger 34 is thus on the one hand from the feed water and on the other hand from the compressed fresh air 38 flows through.
  • the feed water is preheated while the compressed fresh air is cooled; the cooled fresh air is here at 19 designated.
  • a second heat exchanger 35 integrated, which on the one hand flows through the feed water and on the other hand with the Exhaust gas turbine 10 is acted upon.
  • This second heat exchanger 35 is in relation to the exhaust gases downstream of the falling film or Thin film evaporator 14 and upstream of the first with respect to the feed water Heat exchanger 34 or arranged upstream of the water inlet 16.
  • a third heat exchanger 36 is arranged, on the one hand by a Steam-air mixture 37 flows through, which from the Evaporator section 31 of the evaporation line arrangement 29 emerges.
  • this third heat exchanger 36 with the hot exhaust gases 12 applied.
  • this third heat exchanger 36 is thus upstream of the evaporator section 31 of the evaporation line arrangement 29 arranged while he 37 regarding the water vapor-air mixture between the evaporator section 31 and the steam-air mixture outlet 21, that is to say upstream of the gas turbine 10.
  • the Evaporation line arrangement 29 forms with its evaporator section 31 inside an evaporation device, while outside an exhaust gas heat recovery device forms, moreover, by the second Heat exchanger 35 and / or the third heat exchanger 36 can be supplemented.
  • the fresh air 19 acts on it along the evaporator wall 39 formed by the inside of the tubes 30 Feed water 17 according to the countercurrent principle.
  • the fresh air 19 and the hot exhaust gas 12 in the housing 15 Tubes 30 act on the fresh air 19 and the hot exhaust gas 12 in the housing 15 Tubes 30 according to the counterflow principle.
  • the first Heat exchanger 34, the second heat exchanger 35 and the third heat exchanger 36 flows through according to the countercurrent principle.
  • the gas turbine plant 1 is operated as follows: In operation of the gas turbine plant 1, the compressor 2 compresses fresh air 6, of which the portion designated 38 is supplied to the first heat exchanger 34. After the first heat exchanger 34, the compressed and cooled fresh air 19 is fed via the air inlet 18 to the evaporation line arrangement 29, in which it mixes with the feed water evaporating therein, the fresh air 19 also transporting the water vapor-air mixture designated 37 from the Evaporation line arrangement 29 ensures.
  • the hot exhaust gases 12 enter the housing 15 and first act on the third heat exchanger 36 and cause one therein Overheating the water vapor-air mixture 37, causing the desired superheated steam-air mixture 22 is formed.
  • the third Heat exchangers 36 flow around the still hot exhaust gases onto the pipes 30 their outsides. That means the above Evaporator wall 39, along which the feed water flows inside, outside with the still hot exhaust gas.
  • the pipes 30 preferably made of a relatively good heat-conducting material, e.g. B. steel, are produced, there is a relatively intense heat transfer in which on the one hand, the exhaust gases cool relatively strongly, on the other hand, one intensive evaporation of the feed water is achieved.
  • Downstream of this Evaporator section 31 act on the still relatively warm exhaust gases the second heat exchanger 35 and cause a first preheating of the Feedwater.
  • those that have cooled relatively far occur Exhaust gases 24 from the housing 15.
  • feed water 26 is fed into the housing 15 or introduced into the second heat exchanger 35, in which the already above called first preheating of the feed water takes place. So far preheated feed water 28 exits at the additional outlet 27 Housing 15 out and gets into the first heat exchanger 34.
  • Turbolators or the like are used. It can also be beneficial be to feed the feed water tangentially into the individual pipes 30 in order to for example to get a helical flow.
  • the feed water vapor / fresh air mixture formed in the evaporator section 31 37 then passes into the third heat exchanger 36, in which the above described overheating of the water vapor-air mixture takes place.
  • the superheated steam-air mixture 22 can then flow upstream of the combustion chamber 7 are returned to the main stream of compressed fresh air 6.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
EP02405518A 2001-07-13 2002-06-24 Turbine à gaz et sa méthode d'opération Expired - Lifetime EP1275820B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH12902001 2001-07-13
CH12902001 2001-07-13

Publications (2)

Publication Number Publication Date
EP1275820A1 true EP1275820A1 (fr) 2003-01-15
EP1275820B1 EP1275820B1 (fr) 2006-04-05

Family

ID=4565342

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02405518A Expired - Lifetime EP1275820B1 (fr) 2001-07-13 2002-06-24 Turbine à gaz et sa méthode d'opération

Country Status (3)

Country Link
US (1) US6708497B2 (fr)
EP (1) EP1275820B1 (fr)
DE (1) DE50206291D1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050034446A1 (en) * 2003-08-11 2005-02-17 Fielder William Sheridan Dual capture jet turbine and steam generator
JP4275690B2 (ja) * 2006-09-07 2009-06-10 株式会社日立製作所 ガスタービンシステム
US7721543B2 (en) * 2006-10-23 2010-05-25 Southwest Research Institute System and method for cooling a combustion gas charge
ES2457819T3 (es) * 2007-12-10 2014-04-29 Alstom Technology Ltd Procedimiento para la regulación de una turbina de gas en una central eléctrica
US8833079B2 (en) * 2008-09-18 2014-09-16 Douglas W. P. Smith Method and apparatus for generating electricity
PL2354651T3 (pl) * 2010-01-18 2014-11-28 General Electric Technology Gmbh System odzysku ciepła spalin w połączeniu z poprawą odpylania jako rozwiązanie w modernizacji istniejących elektrowni węglowych

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5513488A (en) * 1994-12-19 1996-05-07 Foster Wheeler Development Corporation Power process utilizing humidified combusted air to gas turbine
WO1998001658A1 (fr) * 1996-07-10 1998-01-15 Vattenfall Ab (Publ.) Procede et dispositif pour produire du travail mecanique et, si desire, de la chaleur, dans une turbine a evaporation de gaz

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19647492A1 (de) 1996-11-16 1998-05-20 Abb Research Ltd Verfahren und Vorrichtung zur Speisung einer Gasturbine sowohl mit flüssigen wie auch mit gasförmigen Brennstoffen
JPH11324710A (ja) * 1998-05-20 1999-11-26 Hitachi Ltd ガスタービン発電プラント
US6578354B2 (en) * 2000-01-21 2003-06-17 Hitachi, Ltd. Gas turbine electric power generation equipment and air humidifier

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5513488A (en) * 1994-12-19 1996-05-07 Foster Wheeler Development Corporation Power process utilizing humidified combusted air to gas turbine
WO1998001658A1 (fr) * 1996-07-10 1998-01-15 Vattenfall Ab (Publ.) Procede et dispositif pour produire du travail mecanique et, si desire, de la chaleur, dans une turbine a evaporation de gaz

Also Published As

Publication number Publication date
US20030014977A1 (en) 2003-01-23
DE50206291D1 (de) 2006-05-18
US6708497B2 (en) 2004-03-23
EP1275820B1 (fr) 2006-04-05

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