EP3486440B1 - Générateur de vapeur à récupération de chaleur, procédé de génération de vapeur pour une turbine à vapeur et système comprenant une turbine à vapeur et un générateur de vapeur à récupération de chaleur - Google Patents

Générateur de vapeur à récupération de chaleur, procédé de génération de vapeur pour une turbine à vapeur et système comprenant une turbine à vapeur et un générateur de vapeur à récupération de chaleur Download PDF

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Publication number
EP3486440B1
EP3486440B1 EP17202789.8A EP17202789A EP3486440B1 EP 3486440 B1 EP3486440 B1 EP 3486440B1 EP 17202789 A EP17202789 A EP 17202789A EP 3486440 B1 EP3486440 B1 EP 3486440B1
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EP
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Prior art keywords
steam
heat recovery
steam generator
section
pressure section
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EP17202789.8A
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German (de)
English (en)
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EP3486440A1 (fr
Inventor
Anders STUXBERG
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Siemens Energy Global GmbH and Co KG
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Siemens Energy Global GmbH and Co KG
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Priority to PL17202789.8T priority Critical patent/PL3486440T3/pl
Priority to EP17202789.8A priority patent/EP3486440B1/fr
Publication of EP3486440A1 publication Critical patent/EP3486440A1/fr
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    • 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
    • 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
    • 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
    • F01K27/00—Plants for converting heat or fluid energy into mechanical energy, not otherwise provided for
    • F01K27/005—Plants for converting heat or fluid energy into mechanical energy, not otherwise provided for by means of hydraulic motors

Definitions

  • the invention is directed to a heat recovery steam generator for generating steam for a steam turbine by recovering heat energy out of a flow of exhaust gas, comprising a first pressure section for producing steam at a first pressure. Further, the invention is directed to a method for generating steam for a steam turbine in a heat recovery steam generator. Additionally, the invention is directed to a system, comprising a steam turbine and a heat recovery steam generator, the heat recovery steam generator providing steam for the steam turbine.
  • heat recovery steam generators which are recovering thermal energy of an exhaust gas to generate steam.
  • the exhaust gas can for instance be produced by a gas turbine.
  • the steam generated by the heat recovery steam generator can further on be used in a steam turbine to produce for instance electrical energy.
  • a commonly used solution is an evaporation of steam in tubes which are in direct contact with the exhaust gas.
  • the steam generation in the known heat recovery steam generators are often divided in several sections, for instance a low pressure section, an intermediate pressure section and a high pressure section.
  • Each section comprises an economiser to preheat a fluid, preferably water, to be turned into steam, an evaporator to generate the steam out of the fluid and often a superheater section to superheat the produced steam.
  • an objective of the present invention to provide an improved heat recovery steam generator, an improved method for generating steam for a steam turbine and an improved system comprising a steam turbine and a heat recovery steam generator which do not have the aforementioned drawbacks of the state of the art. It is especially an object of the present invention to provide a heat recovery steam generator, a method for generating steam for a steam turbine and a system comprising a steam turbine and a heat recovery steam generator that are more simple in the structural setup and additionally have improved energy efficiency and can provide steam at different pressures especially in the low pressure regime.
  • a heat recovery steam generator according to the invention can be used to generate steam based on the waste heat in an exhaust gas.
  • the exhaust gas can be provided for instance by a gas turbine.
  • a heat recovery steam generator according to the invention comprises at least a first pressure section to produce steam at a first pressure. This first pressure can be preferably low, for instance between 2bar and 35bar.
  • even more pressure sections can be present, for instance and preferably a second pressure section to produce steam at a high pressure, for instance at pressures beyond 70bar.
  • a third pressure section to produce steam at an intermediate pressure or even more pressure sections can be present.
  • the second pressure section and, if present, all other additional pressure sections, comprise an economiser section, an evaporator section and a superheater section. These sections are sequentially arranged to be flown through by a heating fluid, starting by the economiser section, then the evaporator section and then the superheater section. Preferably, water is used as heating fluid. Further, these sections are arranged thermally coupled to a flow of exhaust gas, wherein the flow direction of the exhaust gas is vice versa to the general flow direction of the heating fluid that means the exhaust gas first is in thermal contact to the superheater section, then the evaporator section and then the economiser section. This arrangement ensures a very efficient thermal energy transfer out of the exhaust gas into the steam produced especially in the second, e.g. high pressure section.
  • the first pressure section which can be the only present pressure section, has a different set-up than the pressure sections known in the state of the art.
  • an economiser is used to transfer thermal energy from the exhaust gas into the feeding fluid used in the first pressure section.
  • water is used preferably. If additional pressure sections are present it is especially preferred that the heating fluid and the feeding fluid share a common reservoir.
  • a flash vessel is used to generate steam out of the feeding fluid by flash evaporation.
  • Flash evaporation occurs, when the feeding fluid undergoes a reduction in pressure by passing a throttling device, for instance already when the feeding fluid enters the flash vessel via a small opening like a fixed orifice or a hole pattern in a plate or cage. Also a valve can be used.
  • a transport of the heat recovered from the exhaust gas is provided by the feeding fluid.
  • the feeding fluid as a liquid has a much higher density than steam. Therefore, the pipes to transport the feeding fluid can be dimensioned much smaller compared to pipes needed to transport steam.
  • a space needed to set up the first pressure section can therefore be massively reduced, especially if the flash vessel is located in vicinity to the steam turbine. This and also a reduction of the number of needed heat exchange modules, especially the avoidance of steam drums, lead to a simplification of the structural setup to the heat recovery steam generator.
  • a mass flow of feeding fluid can be chosen matched to a mass flow of the exhaust gas in a way that at least the same exergy utilisation can be achieved from the exhaust gas to the produced steam in the first pressure section according to the invention compared to a pressure section, especially a low pressure section, according to the state of the art.
  • a first pressure section and therefore a heat recovery steam generator according to the invention provides an alternative and equally capable set-up of a low pressure section of a heat recovery steam generator.
  • a heat recovery steam generator according to the invention can be characterised in that the first pressure section comprises at least two or more flash vessels, especially three flash vessels, preferably four flash vessels, to generate steam out of the feeding fluid by flash evaporation at different pressure levels.
  • the first pressure section comprises at least two or more flash vessels, especially three flash vessels, preferably four flash vessels, to generate steam out of the feeding fluid by flash evaporation at different pressure levels.
  • the first pressure section comprises at least two or more flash vessels, especially three flash vessels, preferably four flash vessels, to generate steam out of the feeding fluid by flash evaporation at different pressure levels.
  • the first pressure section comprises at least two or more flash vessels, especially three flash vessels, preferably four flash vessels, to generate steam out of the feeding fluid by flash evaporation at different pressure levels.
  • an even improved energy transfer between the exhaust gas and the produced steam can be achieved.
  • steam at several, especially low, pressure levels can be provided. Therefore, in addition to the reduced energy losses regarding the thermal energy not extracted from the exhaust gas, an even better performance of the
  • a heat recovery steam generator can be characterised in that the at least two or more flash vessels are sequentially arranged in respect to the flow direction of the feeding fluid. Therefore, feeding fluid not turned into steam in one of the flash vessels can be transported into the sequentially arranged next flash vessel and so on.
  • Each flash vessel can be constructed such that the respective flash vessel is directed to a certain steam pressure.
  • the order of the flash vessels in respect to the flow direction of the feeding fluid is reverse to the pressures and temperatures respectively of the produced steam in the flash vessels.
  • the pressure of the steam produced in the respective flash vessels can therefore be easily adjusted by the design of the flash vessels and/or their connection to the steam turbine.
  • a heat recovery steam generator according to an example, which does not form part of the invention, the example can be characterised in that the at least one flash vessel comprises a pressure reducing device, especially a throttle valve, to generate steam of the feeding fluid by flash evaporation.
  • a flash vessel steam is produced by flash evaporation that means that a sudden decrease of pressure, for instance induced by a sudden increase in available volume, for the flow of feeding fluid resolves at least partly in a transformation of the feeding fluid into steam.
  • a pressure reducing device especially a throttle valve.
  • a water turbine is arranged in the flow of feeding fluid in the flow direction of the feeding fluid before the at least one flash vessel to deliver feeding fluid to the at least one flash vessel and to generate power out of the flow of feeding fluid, in order to improve the energy efficiency of the heat recovery steam generator.
  • the water turbine can additionally recover work out of the flow of feeding fluid and thereby increase the energy efficiency of the heat recovery steam generator.
  • the mechanical work can for instance be used to generate electricity or used directly to drive pumps or other devices of the heat recovery steam generator according to the invention.
  • a heat recovery steam generator can be characterised in that the at least two or more flash vessels are sequentially arranged in respect to the flow direction of the feeding fluid and that the mechanical device comprises at least two stages, wherein at least one of the stages of the mechanical device comprises a feeding pipe to deliver feeding fluid to one of the flash vessels and a transfer pipe to transfer feeding fluid not used to generate steam in this flash vessel to the next stage of the mechanical device.
  • the water turbine is used to provide feeding fluid to several flash vessels.
  • the water turbine comprises at least two stages, preferably the water turbine comprises a dedicated stage for each flash vessel.
  • the water turbine can be preferably constructed such that each flash vessel is provided with feeding fluid at a different pressure.
  • feeding pipes are used to transport the feeding fluid from a first stage of the water turbine into a flash vessel, wherein the feeding fluid is turned into steam at least partly by flash evaporation. Feeding fluid not turned into steam can flow back via a transfer pipe into the sequentially arranged next stage of the water turbine and further on transported by the water turbine via the next feeding pipe into the sequentially next flash vessel.
  • This recirculation of the feeding fluid allows an even better heat recovery out of the exhaust gas via the feeding fluid into the steam produced in the several flash vessels. The energy efficiency and the energy exploitation respectively can therefore be improved.
  • a heat recovery steam generator can be characterised in that the first pressure section comprises at least one first superheater section to superheat steam generated in the at least one flash vessel.
  • the temperature of the steam produced by the first pressure section can be risen further. This can be used to equalise the temperature of the steam and the temperature of the respective steam turbine section. A wear of the steam turbine can thereby be reduced. Further, an improvement of the efficiency of the steam turbine, to which the steam generated in the flash vessel, can be provided. An even better heat recovery and energy exploitation out of the exhaust gas into the produced steam to drive the steam turbine can therefore be achieved.
  • a heat recovery steam generator can be characterised in that the heat recovery steam generator comprises at least a second pressure section and that the at least one first superheater section is thermally coupled to the second pressure section, especially that the at least one first superheater section is constructed to at least partly use heating fluid of the second pressure section.
  • heating fluid out of the second pressure section is used as thermal coupling to superheat the steam produced in the first pressure section.
  • the second pressure section of the heat recovery steam generator according to the invention uses heating fluid on a much higher temperature level than the feeding fluid used in the first pressure section. By using this very hot heating fluid of the second pressure section a superheating of the steam produced in the first pressure section can be provided especially easily. No external heating unit is necessary to provide a superheater section for the first pressure section.
  • the heat recovery steam generator is characterised in that the heat recovery steam generator comprises at least a second pressure section and that the first economiser section of the first pressure section is a part of the second economiser section of the second pressure section.
  • this common part of the economiser sections can be arranged and thermally coupled to a downstream part of the exhaust gas pipe.
  • the first economiser section is included in the second economiser section, the amount of space needed for the set-up for a heat recovery steam generator according to the invention can be reduced.
  • a method for generating steam for a steam turbine in a heat recovery steam generator according to the first aspect of the invention is characterised in that steam for the steam turbine is at least partly generated by flash evaporation.
  • All advantages described in detail in respect to a heat recovery steam generator according to the first aspect of the invention can therefore be achieved by a method for generating steam for a steam turbine in a heat recovery steam generator which is constructed according to the first aspect of the invention. All of these advantages can especially be provided by the fact that steam for the steam turbine is at least partly generated by flash evaporation, especially in a first pressure section of the heat recovery steam generator.
  • this first pressure section is a low pressure section which provides steam at a low pressure, for instance between 2bar and 35bar.
  • the method can be characterised in that a mass flow of the feeding fluid is matched to a mass flow of the exhaust gas, especially that the mass flow feeding fluid times the thermal capacity of the feeding fluid equals or at least roughly equals the mass flow of the exhaust gas times the thermal capacity of the exhaust gas.
  • This matching of the mass flows of the exhaust gas and the feeding fluid used in the first pressure section of the heat recovery steam generator according to the first aspect of the invention provides an especially good replacement of a low pressure section of a heat recovery steam generator according to the state of the art. If a common economiser of two or more pressure sections, for instance of the first, e.g. low, pressure section and a second, e.g.
  • the total flow of feeding and heating fluid can preferably be matched to the flow of the exhaust gas. Especially at least the same heat recovery and therefore energy efficiency can be provided by matching the mass flow of the feeding fluid to a mass flow of the exhaust gas. If water is used as feeding fluid the thermal capacity preferably equals 4.2. As a preferable value for the thermal capacity of an exhaust gas 1.07 can be used.
  • a system comprising a steam turbine and a heat recovery steam generator, the heat recovery steam generator providing steam for the steam turbine.
  • a system according to the invention is characterised in that the heat recovery steam generator is constructed according to the first aspect of the invention. All advantages described in detail in respect to a heat recovery steam generator according to the first aspect of the invention can therefore be achieved by a system according to the third aspect of the invention, which comprises a heat recovery steam generator according to the first aspect of the invention.
  • the heat recovery steam generator of the system according to the third aspect of the invention can also carry out a method according to the second aspect of the invention.
  • a system according to the third aspect of the invention which comprises a heat recovery steam generator capable of carrying out a method according to the second aspect of the invention.
  • a system according to the invention can be characterised in that at least the at least one flash vessel of the first pressure section of the heat recovery steam generator is arranged in vicinity to the steam turbine.
  • an especial short distance between the flash vessel of the heat recovery steam generator and the steam turbine can be provided.
  • the at least one flash vessel steam at a preferably low pressure for the low pressure section of the steam turbine is produced.
  • FIG. 1 shows a system 1 comprising a steam turbine 2 and a heat recovery steam generator 3 according to the state of the art.
  • the steam turbine 2 is used to drive an electric generator 4 to produce electric energy.
  • the heat recovery steam generator 3 comprises three sections, a second pressure section 10 to provide high pressure steam, an third pressure section 30 to provide intermediate pressure steam and a first pressure section 20 to provide steam at a low pressure.
  • the different units of the sections 10, 20, 30 are arranged along a stream of exhaust gas 40.
  • Pumps 5 are used to convey heating fluid 41 through the first pressure section 20, the third pressure section 30 and the second pressure section 10.
  • the different branches of the heating fluid 41 share a common reservoir and preferably water is used for the heating fluid 41.
  • the heat recovery steam generator 3 starts with a common arrangement of the first economiser section 23 of the first pressure section 20 and the second and third economiser section 13, 33 of the third pressure section 30 and the second pressure section 10 respectively.
  • the first evaporator section 22 of the first pressure section 20 which is further upstream in respect to the flow of exhaust gas 40 followed by a first superheater section 21 of the first pressure section 20.
  • the low pressure steam 50 is then conveyed to the low pressure section of the steam turbine 2.
  • further units of the third pressure section 30 and the second pressure section 10 are sequentially arranged along the flow of exhaust gas 40.
  • the third pressure section 30 as well as the second pressure section 10 comprise several economiser sections 13, 33 and one evaporator section 12, 33 each. Also several superheater sections 11, 31 are part of the third pressure section 30 and the second pressure section 10 of the heat recovery steam generator 3 according to the state of the art as well.
  • the steam 50 at a high pressure level generated in the second pressure section 10 is afterwards provided to the steam turbine 2 on its high pressure end.
  • the steam 50 at an intermediate pressure level generated in the third pressure section 30 is provided to an intermediate point in the steam turbine 2.
  • the heat recovery steam generator 3 according to the state of the art only provides low pressure steam 50 at one single pressure level.
  • the position of the steam generation of the first pressure section 20 is determined by the flow of exhaust gas 40. Consequently, long distances between this position and the steam turbine 2 cannot be avoided, causing a huge dimensional requirement in regard to setup space for the pipes to transport the low pressure steam 50.
  • FIG. 2 a system 1 not forming part of the invention is shown.
  • this system 1 comprises a heat recovery steam generator 3 according to the invention and a steam turbine 2.
  • the second pressure section 10 and the third pressure section 30 of the heat recovery steam generator 3 are in general constructed as the respective sections 10, 30 of a heat recovery steam generator 3 according to the state of the art. For details, see Fig. 1 and the according description respectively. Differences arise especially in the first pressure section 20. It starts with a common economiser 13, 23, 33 of all three pressure sections 10, 20, 30. After a division, feeding fluid 42, preferably water, of the first pressure section 20 is provided to a first flash vessel 24 comprising a pressure reducing device, especially a throttle valve 25.
  • steam 50 is generated by flash evaporation, wherein the throttle valve 25 can be used to regulate and adjust the properties of the steam 50 produced in this flash vessel 24.
  • Feeding fluid 42 not converted into steam 50 is provided to the next flash vessel 24, again providing a throttle valve 25. This is done in a cascading way four times, e.g. there are four flash vessels 24 with a throttle valve 25 each. Still not converted feeding fluid 42 is returned and recirculated.
  • the four flash vessels 24 are therefore sequentially arranged in the flow of feeding fluid 42 and the different flash vessels 24 are constructed such that the pressure of steam 50 produced by flash evaporation in the respective flash vessel 24 is different. Therefore, the low pressure section of the steam turbine 2 can be fed with low pressure steam 50 at different pressure levels.
  • a system 1 according to the invention comprising a heat recovery steam generator 3 according to the invention can provide several levels of low pressure steam 50 especially easy. Further, if the flash vessels 24 are placed in the vicinity of the steam turbine 2, the pipes used to convey the steam 50 produced in the flash vessels 24 to the steam turbine 2 can be constructed short.
  • a mass flow of feeding fluid 42 and a mass flow of the exhaust gas 40 can be matched, especially by using the respective thermal capacities as matching constants. This allows providing at least the same transfer of thermal energy between the exhaust gas 40 and the produced steam 50 in the first pressure section 20 regardless whether a heat recovery steam generator 3 according to the state of the art or a heat recovery steam generator 3 according to the invention is used.
  • FIG. 3 shows an embodiment of the invention of a heat recovery steam generator 3.
  • a water turbine 26, which is used to convey feeding fluid 42 into several flash vessels 24 is depicted.
  • the feeding fluid 42 enters the first stage of the water turbine 26 and is conveyed via a feeding pipe 28 into the first flash vessel 24.
  • part of the feeding fluid 42 is converted into steam 50 by flash evaporation.
  • a superheating of the produced steam 50 in an additional first superheater section 21 is possible.
  • Feeding fluid 42 not converted into steam 50 is conveyed via a transfer pipe 29 into the next stage of the water turbine 26. This is done sequentially three times.
  • the pressure of the feeding fluid 42 conveyed by the water turbine 26 into the different flash vessels 24 is decreasing for each stage of the water turbine 26.
  • the water turbine 26 is used to generate power out of the flow of feeding fluid 42.
  • the power can for instance be used to generate electricity or used directly to drive pumps 5 (not shown) or other devices of the heat recovery steam generator 3 according to the invention.

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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 (11)

  1. Générateur de vapeur à récupération de chaleur (3) pour générer de la vapeur (50) pour une turbine à vapeur (2) en récupérant de l'énergie thermique d'un flux de gaz d'échappement (40), comprenant au moins une première section sous pression (20) pour produire de la vapeur (50) à une première pression, dans lequel la première section sous pression (20) comprend une première section d'économiseur (23) couplée thermiquement au gaz d'échappement pour chauffer un fluide d'alimentation (42) et au moins un ballon de revaporisation (24) pour générer de la vapeur (50) depuis le fluide d'alimentation (42) par évaporation flash, caractérisé en ce que la première section sous pression (20) comprend une turbine hydraulique (26) disposée dans le flux du fluide d'alimentation (42) dans le sens d'écoulement du fluide d'alimentation (42) avant le au moins un ballon de revaporisation (24) pour fournir du fluide d'alimentation (42) au au moins un ballon de revaporisation (24) et pour générer de l'énergie à partir du flux du fluide d'alimentation (42).
  2. Générateur de vapeur à récupération de chaleur (3) selon la revendication 1, dans lequel la première section sous pression (20) comprend au moins deux ou plusieurs ballons de revaporisation (24), plus particulièrement trois ballons de revaporisation (24), de préférence quatre ballons de revaporisation (24), pour générer de la vapeur à partir du fluide d'alimentation (42) par évaporation flash à différents niveaux de pression.
  3. Générateur de vapeur à récupération de chaleur (3) selon la revendication 2, dans lequel le au moins deux ou plusieurs ballons de revaporisation (24) sont disposés d'une manière séquentielle par rapport au sens d'écoulement du fluide d'alimentation (42).
  4. Générateur de vapeur à récupération de chaleur (3) selon la revendication 2, dans lequel le au moins deux ou plusieurs ballons de revaporisation (24) sont agencés d'une manière séquentielle par rapport au sens d'écoulement du fluide d'alimentation (42) et dans lequel la turbine hydraulique (26) comprend au moins deux paliers (27), dans lequel au moins l'un des paliers (27) de la turbine hydraulique (26) comprend un tube d'alimentation (28) pour fournir du fluide d'alimentation (42) à l'un des ballons de revaporisation (24) et un tube de transfert (29) pour transférer du fluide d'alimentation (42) non utilisé pour générer de la vapeur (50) dans ce ballon de revaporisation (24) au palier suivant (27) de la turbine hydraulique (26).
  5. Générateur de vapeur à récupération de chaleur (3) selon l'une des revendications précédentes, dans lequel la première section sous pression (20) comprend au moins une première section de surchauffeur (21) pour surchauffer la vapeur (50) générée dans le au moins un ballon de revaporisation (24).
  6. Générateur de vapeur à récupération de chaleur (3) selon la revendication 5, dans lequel le générateur de vapeur à récupération de chaleur (3) comprend au moins une deuxième section sous pression (10) et dans lequel la au moins une première section de surchauffeur (21) est couplée thermiquement à la deuxième section sous pression (10), plus particulièrement dans lequel la au moins une première section de surchauffeur (21) est construite pour utiliser au moins partiellement le fluide de chauffage (41) de la deuxième section sous pression (10) .
  7. Générateur de vapeur à récupération de chaleur (3) selon la revendication 5, dans lequel le générateur de vapeur à récupération de chaleur (3) comprend au moins une deuxième section sous pression (10) et une deuxième section d'économiseur (13) et dans lequel la première section d'économiseur (23) de la première section sous pression (20) fait partie de la deuxième section d'économiseur (13) de la deuxième section sous pression (10) .
  8. Procédé pour générer de la vapeur (50) pour une turbine à vapeur (2) dans un générateur de vapeur à récupération de chaleur (3) selon l'une des revendications précédentes, dans lequel la vapeur (50) pour la turbine à vapeur (2) est au moins partiellement générée par évaporation flash.
  9. Procédé selon la revendication 8, dans lequel un débit massique du fluide d'alimentation (42) est ajusté à un débit massique du gaz d'échappement, plus particulièrement le débit massique du fluide d'alimentation (42) multiplié par la capacité thermique du fluide d'alimentation (42) est égal ou au moins approximativement égal au débit massique du gaz d'échappement (40) multiplié par la capacité thermique du gaz d'échappement (40) .
  10. Système (1) comprenant une turbine à vapeur (2) et un générateur de vapeur à récupération de chaleur (3), le générateur de vapeur à récupération de chaleur (3) fournissant de la vapeur (50) pour la turbine à vapeur (2), dans lequel le générateur de vapeur à récupération de chaleur (3) est construit selon l'une des revendications 1 à 7.
  11. Système (1) selon la revendication 10, dans lequel au moins le au moins un ballon de revaporisation (24) de la première section sous pression (20) du générateur de vapeur à récupération de chaleur (3) est agencé à proximité de la turbine à vapeur (2) .
EP17202789.8A 2017-11-21 2017-11-21 Générateur de vapeur à récupération de chaleur, procédé de génération de vapeur pour une turbine à vapeur et système comprenant une turbine à vapeur et un générateur de vapeur à récupération de chaleur Active EP3486440B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL17202789.8T PL3486440T3 (pl) 2017-11-21 2017-11-21 Kocioł odzyskowy, sposób generowania pary dla turbiny parowej i układ zawierający turbinę parową i kocioł odzyskowy
EP17202789.8A EP3486440B1 (fr) 2017-11-21 2017-11-21 Générateur de vapeur à récupération de chaleur, procédé de génération de vapeur pour une turbine à vapeur et système comprenant une turbine à vapeur et un générateur de vapeur à récupération de chaleur

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US3611718A (en) * 1970-05-05 1971-10-12 Treadwell Corp Waste heat steam generating cycle
FI102405B1 (fi) * 1993-07-08 1998-11-30 Waertsilae Nsd Oy Ab Menetelmä lämpövoimakoneen kokonaishyötyenergiatuotannon parantamiseksi ja voimalaitos, jossa on nestejäähdytteinen lämpövoimakone
DE19604664A1 (de) * 1996-02-09 1997-08-14 Asea Brown Boveri Verfahren zum Betrieb einer Kraftwerksanlage
US10914200B2 (en) * 2013-10-31 2021-02-09 General Electric Technology Gmbh Combined cycle power plant with improved efficiency
US9470112B2 (en) * 2014-11-13 2016-10-18 General Electric Company System and method for heat recovery and steam generation in combined cycle systems
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