EP2705225A2 - Installation de turbine à vapeur et procédé pour faire fonctionner une installation de turbine a vapeur - Google Patents

Installation de turbine à vapeur et procédé pour faire fonctionner une installation de turbine a vapeur

Info

Publication number
EP2705225A2
EP2705225A2 EP12729473.4A EP12729473A EP2705225A2 EP 2705225 A2 EP2705225 A2 EP 2705225A2 EP 12729473 A EP12729473 A EP 12729473A EP 2705225 A2 EP2705225 A2 EP 2705225A2
Authority
EP
European Patent Office
Prior art keywords
steam turbine
steam
feedwater
additional
line
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
EP12729473.4A
Other languages
German (de)
English (en)
Other versions
EP2705225B1 (fr
Inventor
Michael Wechsung
Carsten Graeber
Thomas Loeper
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.)
Siemens AG
Original Assignee
Siemens AG
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 AG filed Critical Siemens AG
Priority to EP20120729473 priority Critical patent/EP2705225B1/fr
Publication of EP2705225A2 publication Critical patent/EP2705225A2/fr
Application granted granted Critical
Publication of EP2705225B1 publication Critical patent/EP2705225B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
    • F01K7/34—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of extraction or non-condensing type; Use of steam for feed-water heating
    • F01K7/40—Use of two or more feed-water heaters in series
    • 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
    • F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
    • F01K7/34—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of extraction or non-condensing type; Use of steam for feed-water heating
    • F01K7/44—Use of steam for feed-water heating and another purpose
    • 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
    • F01K13/00—General layout or general methods of operation of complete plants
    • F01K13/02—Controlling, e.g. stopping or starting
    • 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
    • F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
    • F01K7/34—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of extraction or non-condensing type; Use of steam for feed-water heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
    • F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
    • F22D1/32—Feed-water heaters, i.e. economisers or like preheaters arranged to be heated by steam, e.g. bled from turbines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
    • F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
    • F22D1/32—Feed-water heaters, i.e. economisers or like preheaters arranged to be heated by steam, e.g. bled from turbines
    • F22D1/325—Schematic arrangements or control devices therefor

Definitions

  • the invention relates to a steam turbine plant and a Ver ⁇ drive for operating the steam turbine plant.
  • a steam turbine plant is used in particular in a thermi ⁇ thermal power plant for generating electrical energy use.
  • the steam turbine plant has a steam turbine ⁇ and a steam generator, heated with the feed water, thereby generating live steam, which is provided to the steam turbine for driving the same.
  • This cycle of the steam turbine plant is commonly designed such that it has the maxi ⁇ paint thermal efficiency at full load of the steam turbine. Other operating conditions, which are below the full load, lead to an accordingly entspre ⁇ lower thermal efficiencies.
  • the partial load operation of the steam turbine plant in particular ⁇ when it is used in the power plant, is of high relevance, since, for example, in the steam turbine plant a power reserve is to be maintained for coping with overload operating conditions.
  • the object of the invention is to provide a steam turbine plant and a method to operate the steam turbine plant to sheep ⁇ fen, wherein the steam turbine plant over a wide Leis ⁇ processing section has a high thermal efficiency.
  • the steam turbine system according to the invention has a Dampftur ⁇ bine, a steam generator and a process-steam-powered Suiteingervor maybermungs adopted, wherein the steam turbine comprises an overload bypass line, with the steam between the steam inlet and the discharge point of the Suiteiganvor maybermungs adopted be fed when overload operation of the steam turbine, wherein the Suiteiganvorierrmungs adopted a Additional tapping line has, which is connected to the overload bypass line so that during partial load operation of the steam turbine can be removed from this process steam and the feedwater pre-heating device for additional feedwater pre-heating is zuglagbar.
  • the method according to the invention for operating the steam turbine plant has the steps of: determining the optimum efficiency and the associated rated power of the steam turbine; as soon as the steam turbine is operated above the rated power, releasing the overload bypass line and isolating the additional tapping line, so that live steam is fed between the steam turbine inlet of the steam turbine and the extraction point of the feedwater pre-heater; as soon as the steam turbine is driven below the nominal line, iso ⁇ lieren the overload bypass line and releasing the additional extraction line, so that process steam is taken between the steam turbine inlet of the steam turbine and the extraction point and the feedwater preheating device is supplied to the additional feedwater preheating.
  • thermodynamically induced lowering of the feedwater temperature can be counteracted with decreasing steam turbine power.
  • a lowering of the thermal efficiency of the steam turbine plant would be accompanied by the feed water temperature reduction, is achieved with the operation of the additional extraction line in partial load operation of the steam turbine, that the thermal ⁇ cal efficiency of the steam turbine is high.
  • the thermal efficiency is high, so that its thermal efficiency is high over a wide power range of the steam turbine.
  • the point of the steam turbine at which both the overload bypass line and the additional extraction line open into the steam turbine is the same point for feeding the live steam in case of overload as well as for removing the process steam Partial load case provided.
  • the steam turbine to only a one ⁇ Zige point where both the overload bypass line and the additional extraction line are grown.
  • the provision of two or more points for feeding the live steam in case of overload and removing the process steam in part load would be structurally complex and only correspondingly costly to implement, so that the steam turbine plant according to the invention with its single junction for the overload bypass line and the additional extraction line easy and is constructed inexpensively.
  • the steam turbine plant is formed with a control system.
  • an equalization of the efficiency profile as a function of the power of the Dampftur ⁇ bine is advantageously achieved.
  • load changes of the steam turbine systems can be moved faster at a constant and high level of thermal efficiency.
  • the load range is large, in which the steam turbine plant is operable at a constant over the time and produced by the steam generator steam temperature.
  • the steam turbine plant has a minimum operating point at a low partial load level at which the steam turbine can still be operated under stable conditions in the steam turbine plant (Benson minimum load).
  • the additional feedwater is such that the feedwater temperature at the feed water inlet of the steam generator via the load is constant.
  • the additional feedwater such that the feed water temperature increases in the operating condition of the steam turbine under ⁇ half of the rated output at the feedwater inlet of the steam generator with decreasing power of the steam turbine plant.
  • the rise in the feedwater temperature can advantageously be exploited to the limit of the thermal and mechanical load capacity of the steam generator.
  • Any flue gas process steps downstream of the steam turbine plant, such as a DeNOx plant, can be operated at a higher flue gas temperature as a result of the raised feedwater temperature.
  • This feedwater pre-heater preferably has a feedwater pre-heater that is different from that of the As a result, the process steam taken from the additional extraction line and the process steam removed from the extraction point are supplied to operate the feedwater pre-heater.
  • the feedwater preheating device has a feedwater preheater operated by the process steam withdrawn from the sampling point and an auxiliary preheater operated by the process steam withdrawn with the supplemental sampling line.
  • theificatvorier in the feed water stream ⁇ is connected downstream of the feedwater preheater.
  • the additional preheater is advantageously downstream of the feedwater ⁇ servoruzar. This is particularly advantageous because the pressure level of the process steam, with which the additional preheater is operated, is higher than the pressure level of the process steam, with which the feedwater pre-heater is operated.
  • the feedwater preheating device has a three-way valve with which the additional preheater in the feedwater flow can be switched on and switched off from the feedwater flow.
  • a partial flow of the feedwater flow through the additional preheater can be conducted with the three-way valve.
  • an additional sampling valve is preferably incorporated extent to which the mass flow of the Pro ⁇ zessdampfs is controllable in the additional removal pipe.
  • the steam turbine plant 1 has a feedwater supply line 3, with which feed water is supplied to the steam generator 2. Downstream of the steam generator 2, a superheater 4 is provided, through which the live steam is provided in a supercritical state.
  • the steam turbine plant 1 to a steam turbine 5, which is designed as a high pressure stage 6 and at de ⁇ ren entry of live steam via a main steam line 7 for driving the steam turbine 5 can be flowed.
  • the mass flow of the live steam is controllable with a built-in Frischdampflei ⁇ device 7 main steam valve 8.
  • the live steam can be relaxed as process steam, whereby the shaft power of the steam turbine 5 can be obtained.
  • the steam turbine 5 has a removal nozzle 9, which opens into a withdrawal line 10, which leads to a feedwater supply. warmer 11 leads.
  • the feedwater heater 11 is designed as a heat exchanger leads connected to the Lucaswasserzu slaughtertechnisch 3, so that preheating of the feed water in the feed water preheater 11 is bewerkstelligbar ⁇ under condensing the process steam.
  • the condensate produced during condensation of the process steam can be discharged via a condensate line 12 in a condensate collecting line 13.
  • the steam turbine 5 has an overload bypass line 14 which branches off upstream of the main steam valve 8 from the Frischdampflei ⁇ device 7 and leads to a Studentslastbypassstutzen 15 of the steam turbine 5, which is arranged between the live steam inlet and the sampling nozzle 9.
  • an overload bypass valve 16 is provided, with which both the fresh steam mass flow flowing through the overload bypass line 14 controllable and the overload bypass line 14 can be isolated.
  • the Matterlastby ⁇ pass line 14 opens into an additional extraction line 17, which leads to a relievevortude 19.
  • an additional extraction valve 18 is installed, with which the process steam flowing through the additional extraction line 17 is controllable in its mass flow and with which the Rajentnahiemei ⁇ device 17 is isolatable.
  • the additional preheater 19 is designed as a heat exchanger, which can be flowed through both from the process steam from the additional extraction line 17 and from the feed water from the feedwater supply line 3.
  • the additional preheater 19 is arranged downstream of the feedwater preheater 11, so that feed water which has already been preheated by the feedwater preheater 11 can be flowed through the additional preheater 19.
  • the additional preheater 19 is connected in parallel to the feedwater supply line 3 via a feedwater preheating line 21.
  • a three-way valve 20 is installed, with which the feedwater flow in the feedwater supply line 3, which can be flowed through the additional preheater 19, can be regulated.
  • the three-way valve 20 is to be switched accordingly when either no feed water, the entire feedwater flow or only a part thereof is to be passed through the additional preheater 19.
  • Over the power range of the steam turbine 5 its thermal efficiency is variable according to their design and construction.
  • the steam turbine 5 is designed so that it should have the maximum thermal efficiency at a given rated power.
  • the three-way valve 20 is to operate accordingly.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Control Of Turbines (AREA)

Abstract

Installation de turbine à vapeur comprenant une turbine à vapeur (5), un générateur de vapeur (2) et une installation de réchauffage d'eau d'alimentation (9-13, 17-21) fonctionnant à la vapeur de process, la turbine à vapeur (5) comportant un conduit de dérivation de surcharge (14) au moyen duquel, en régime de surcharge de la turbine à vapeur (5), de la vapeur vive est envoyée entre l'entrée de la turbine à vapeur et le point de prélèvement (9) de l'installation de réchauffage d'eau d'alimentation (9-13, 17-21). L'invention est caractérisée en ce que l'installation de réchauffage d'eau d'alimentation (9-13, 17-21) comporte un conduit de prélèvement supplémentaire (17) qui est raccordé au conduit de dérivation de surcharge (14) de telle sorte que, lorsque la turbine à vapeur (5) fonctionne en charge partielle, de la vapeur de process peut être extraite de celle-ci et envoyée à l'installation de réchauffage d'eau d'alimentation (9-13, 17-21) pour un réchauffage d'eau d'alimentation supplémentaire.
EP20120729473 2011-07-14 2012-06-14 Installation de turbine à vapeur et procédé pour faire fonctionner une installation de turbine a vapeur Not-in-force EP2705225B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20120729473 EP2705225B1 (fr) 2011-07-14 2012-06-14 Installation de turbine à vapeur et procédé pour faire fonctionner une installation de turbine a vapeur

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP11174006A EP2546476A1 (fr) 2011-07-14 2011-07-14 Installation de turbines à vapeur et procédé pour opérer l'installation de turbines à vapeur
PCT/EP2012/061251 WO2013007462A2 (fr) 2011-07-14 2012-06-14 Installation de turbine à vapeur et procédé pour faire fonctionner une installation de turbine a vapeur
EP20120729473 EP2705225B1 (fr) 2011-07-14 2012-06-14 Installation de turbine à vapeur et procédé pour faire fonctionner une installation de turbine a vapeur

Publications (2)

Publication Number Publication Date
EP2705225A2 true EP2705225A2 (fr) 2014-03-12
EP2705225B1 EP2705225B1 (fr) 2015-04-29

Family

ID=46354230

Family Applications (2)

Application Number Title Priority Date Filing Date
EP11174006A Withdrawn EP2546476A1 (fr) 2011-07-14 2011-07-14 Installation de turbines à vapeur et procédé pour opérer l'installation de turbines à vapeur
EP20120729473 Not-in-force EP2705225B1 (fr) 2011-07-14 2012-06-14 Installation de turbine à vapeur et procédé pour faire fonctionner une installation de turbine a vapeur

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP11174006A Withdrawn EP2546476A1 (fr) 2011-07-14 2011-07-14 Installation de turbines à vapeur et procédé pour opérer l'installation de turbines à vapeur

Country Status (5)

Country Link
US (1) US9322298B2 (fr)
EP (2) EP2546476A1 (fr)
JP (1) JP5990581B2 (fr)
CN (1) CN103649474B (fr)
WO (1) WO2013007462A2 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2980475A1 (fr) 2014-07-29 2016-02-03 Alstom Technology Ltd Procédé pour le fonctionnement à faible charge d'une centrale électrique dotée d'une chaudière à passage forcé unique
EP3128135A1 (fr) * 2015-08-06 2017-02-08 Siemens Aktiengesellschaft Conception de turbine dans une zone d'entrée de surcharge
EP3128136A1 (fr) 2015-08-07 2017-02-08 Siemens Aktiengesellschaft Introduction de surcharge dans une turbine a vapeur
CN106437889A (zh) * 2016-10-09 2017-02-22 芜湖凯博环保科技股份有限公司 一种可替代凝汽器或空冷岛的装置及其控制方法
PL3473822T3 (pl) * 2017-10-19 2023-09-11 Doosan Skoda Power S.R.O. Układ recyrkulacji pary dla niskoprężnej turbiny parowej
EP3810906A1 (fr) * 2018-09-27 2021-04-28 Siemens Energy Global GmbH & Co. KG Système de turbomachine et procédé pour faire fonctionner un système de turbomachine
JP7053520B2 (ja) * 2019-02-20 2022-04-12 日立Ｇｅニュークリア・エナジー株式会社 原子力発電プラント及び原子力発電プラントの制御方法

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JPH04358707A (ja) 1991-06-05 1992-12-11 Mitsubishi Heavy Ind Ltd タービンプラントの給水加熱装置
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EP1241323A1 (fr) 2001-03-15 2002-09-18 Siemens Aktiengesellschaft Procédé de fonctionnement d'une centrale d'énergie à vapeur et centrale d'énergie à vapeur
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EP2299068A1 (fr) 2009-09-22 2011-03-23 Siemens Aktiengesellschaft Centrale thermique comprenant vanne de regulation de surcharge
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Also Published As

Publication number Publication date
US9322298B2 (en) 2016-04-26
JP5990581B2 (ja) 2016-09-14
EP2546476A1 (fr) 2013-01-16
US20140130499A1 (en) 2014-05-15
CN103649474B (zh) 2015-12-23
WO2013007462A3 (fr) 2013-08-22
JP2014522940A (ja) 2014-09-08
WO2013007462A2 (fr) 2013-01-17
CN103649474A (zh) 2014-03-19
EP2705225B1 (fr) 2015-04-29

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