EP1775430A1 - Centrale à vapeur et procédé pour réaménager une centrale à vapeur - Google Patents

Centrale à vapeur et procédé pour réaménager une centrale à vapeur Download PDF

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Publication number
EP1775430A1
EP1775430A1 EP05022606A EP05022606A EP1775430A1 EP 1775430 A1 EP1775430 A1 EP 1775430A1 EP 05022606 A EP05022606 A EP 05022606A EP 05022606 A EP05022606 A EP 05022606A EP 1775430 A1 EP1775430 A1 EP 1775430A1
Authority
EP
European Patent Office
Prior art keywords
steam
turbine
power plant
auxiliary
drive shaft
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.)
Withdrawn
Application number
EP05022606A
Other languages
German (de)
English (en)
Inventor
Kai Dr. Wieghardt
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 EP05022606A priority Critical patent/EP1775430A1/fr
Priority to US12/083,668 priority patent/US7975483B2/en
Priority to EP06807006.9A priority patent/EP1937942B1/fr
Priority to PL06807006T priority patent/PL1937942T3/pl
Priority to CN2006800385510A priority patent/CN101292075B/zh
Priority to JP2008534998A priority patent/JP4833293B2/ja
Priority to PCT/EP2006/067096 priority patent/WO2007045563A2/fr
Publication of EP1775430A1 publication Critical patent/EP1775430A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • F01K7/16—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 only of turbine type

Definitions

  • the invention relates to a steam power plant with at least one steam heater for providing compressed steam, a steam heater downstream, arranged on a main drive shaft and designed for operation with high pressure and / or medium pressure steam main turbine, as well as between the steam superheater and the main turbine connected and on a Additional drive shaft arranged additional turbine.
  • the invention further relates to a method for retrofitting a steam power plant with at least one steam heater for providing compressed steam, and a steam turbine downstream, arranged on a main shaft and designed for operation with high pressure and / or medium pressure steam main turbine.
  • the method includes the step of retrofitting the thermal power plant with an auxiliary turbine disposed on an auxiliary drive shaft.
  • the above-mentioned main turbine designed for operation with high pressure and / or medium pressure steam can be designed as a separate high-pressure, as a separate medium-pressure or as a combined high-pressure / medium-pressure turbine.
  • High-pressure turbines are usually designed for a temperature of 520 to 600 ° C and a pressure of 120 to 300 bar.
  • medium-pressure turbines are generally designed to hold 520 to 620 ° C hot steam at a pressure of 30 to 60 bar.
  • the steam generator of the steam power plant can use various heat sources for steam generation, in particular the exhaust gas of a gas turbine. In this respect, the steam power plant can also be part of another power plant.
  • an auxiliary turbine is connected on an auxiliary drive shaft between the steam heater and the main turbine.
  • the main drive shaft is mechanically coupled to the auxiliary drive shaft for driving an electric generator in the rule.
  • An object of the invention is to improve a steam power plant of the type mentioned and a method for retrofitting a steam power plant of the type mentioned in that the performance and efficiency of the steam power plant can be further increased.
  • This object is achieved according to the invention with a generic steam power plant, in which the auxiliary turbine is designed to a relative to a rated speed of the main turbine by at least 50% higher operating speed.
  • the object is further achieved by a generic method, in which the auxiliary turbine is designed to be at a rated speed of the main turbine by at least 50% higher operating speed.
  • the steam conditions for the additional turbine which is designed in particular as a high-pressure or medium-pressure turbine, can be increased considerably.
  • the relative to the rated speed of the main turbine by at least 50% higher operating speed of the auxiliary turbine allows efficiency-enhancing operation of the auxiliary turbine with steam conditions increased temperature and increased pressure.
  • a conversion of these increased steam conditions into mechanical power can be done at the correspondingly high operating speed with increased efficiency.
  • This increases the output power of the additional turbine.
  • the vapor state advantageously has a vapor state which the main turbine is usually designed. That is, the power generated by the auxiliary turbine is available in addition to the power generated by the steam power plant prior to retrofitting with the auxiliary turbine.
  • the additional turbine is arranged on an auxiliary drive shaft, retrofitting of an existing steam power plant with the auxiliary turbine is possible without much effort.
  • the main drive shaft of the existing steam power plant does not need to be modified.
  • additional turbine only a suitable space in the steam power plant must be found and then the steam heater leaving the steam mass flow are passed through appropriate adaptation of pipelines through the auxiliary turbine to the main turbine.
  • the operating speed of the auxiliary turbine with respect to the rated speed of the main turbine twice the value.
  • the additional turbine is designed for a steam temperature of 700 to 760 ° C.
  • the steam heater is also designed to produce a steam temperature of 700 to 760 ° C.
  • the steam in the auxiliary turbine cools with appropriate expansion to 520 ° C to 620 ° C and is forwarded at this temperature to the main turbine. The said steam temperatures lead to a further improved efficiency and a further improved power output of the steam power plant.
  • the auxiliary drive shaft is coupled to a high-speed generator.
  • the thermal power plant has an electric speed converter for reducing the frequency of the AC voltage generated by the high-speed generator.
  • a main generator is provided on the main drive shaft.
  • the electric speed converter reduces the frequency of the AC voltage generated by the high speed generator coupled to the auxiliary drive shaft to the frequency of the AC electric current generated by the main drive shaft. This preferably has the usual mains frequency of 50 Hz.
  • the alternating current generated by the auxiliary turbine can thus be fed into the power grid together with the alternating current generated by the main generator without further conversion effort.
  • the auxiliary drive shaft is coupled via a mechanical speed converter to the main drive shaft.
  • the mechanical speed converter reduces the frequency of the auxiliary drive shaft to the frequency of the main drive shaft.
  • the mechanical energy generated by the auxiliary turbine is thus transmitted to the shaft train of the main drive shaft.
  • the electrical main generator connected to the main drive shaft thus also converts the mechanical energy generated by the auxiliary turbine into electrical energy.
  • An additional generator does not have to be provided.
  • the steam heater is designed as a live steam generator, which in particular has a steam boiler.
  • a live steam generator the aforementioned high steam conditions can be efficiently generated.
  • the steam heater is designed as a reheater. With a reheater, steam that has already passed through a first turbine can be processed for feeding to the additional turbine according to the invention.
  • the steam heater, in particular the steam generator, or the Reheater compared to conventional steam heaters or reheaters additional superheater surfaces on.
  • the additional turbine is arranged close to the steam heater, in particular on a steam boiler of the steam heater. This arrangement is particularly useful for supplying super-supercritical steam conditions to the auxiliary turbine. Furthermore, the respective length of fresh steam generator and reheater lines is advantageously reduced to a minimum. The remaining lines can be carried out conventionally.
  • the main propulsion turbine are successively a reheater, another additional turbine and another main turbine, which are each designed in particular as a medium-pressure turbine, downstream, the further auxiliary turbine are arranged on the auxiliary drive shaft and the other main turbine on the main drive shaft.
  • a further mouldgrad- and increase in efficiency of the steam power plant can be achieved.
  • the expanded steam leaving the first main turbine is restored by the reheater to a high vapor state, preferably at a temperature of about 720 ° C.
  • the auxiliary drive shaft is supplied with additional power, which increases the electric power output of the electric generator coupled thereto.
  • the steam heater with additional superheater surfaces retrofitted.
  • this retrofitting is done with additional superheater surfaces in a steam generator designed as a steam generator.
  • the thus retrofitted steam heater can thus produce higher steam conditions. This in turn allows for improved operation of the retrofitted with the auxiliary turbine steam power plant.
  • the auxiliary turbine is expediently designed for a steam temperature of 700 to 760 ° C.
  • the steam power plant is retrofitted with a high-speed generator and an electric speed converter, coupled the fast-running generator to the auxiliary drive shaft, and coupled the electric speed converter to the high-speed generator for reducing the frequency of the alternating current generated by the high-speed generator.
  • the steam power plant is expediently retrofitted with a mechanical speed converter and the auxiliary drive shaft coupled to the main drive shaft via the mechanical speed converter.
  • the additional turbine is arranged near the steam heater, in particular on a steam boiler of the steam heater.
  • a further additional turbine is arranged downstream of the steam power plant and arranged downstream of a further main turbine of the additional auxiliary turbine.
  • the other main turbine and the additional auxiliary turbine are each designed as medium-pressure turbines, wherein the additional auxiliary turbine are arranged on the auxiliary drive shaft and the other main turbine on the main drive shaft.
  • FIG. 1 shows a conventional steam power plant 10 prior to retrofitting according to the invention
  • FIG. 2 shows a steam power plant 12 retrofitted according to the invention or a corresponding newly produced steam power plant 12.
  • the steam power plant 10 according to FIG. 1 is equipped with a steam generator 14 serving as steam heater.
  • the live steam generator 14 is supplied with either low-temperature or liquid steam, which converts the live steam generator 14 into high-pressure, high-temperature steam and thus high-steam steam.
  • the live steam is then fed via a steam line 16 to a first main turbine 18 designed as a high-pressure turbine, in which it expands under the drive of a main drive shaft 20 connected to the first main turbine 18.
  • the expanded and thus cooled steam is then fed to a reheater 22, wherein a repeated heating of the steam takes place.
  • the steam is supplied via a further steam line 16 to a second main turbine 24 designed as a medium-pressure turbine.
  • the steam expands again and transmits additional torque to the main turbine drive shaft 20.
  • the steam of a low-pressure turbine 26 is supplied, in which it further expands with further transmission of torque to the main drive shaft 20.
  • a main electric generator 28 is connected to the main drive shaft 20, by means of which the mechanical energy of the main drive shaft 20 is converted into electrical energy.
  • the high-pressure, medium-pressure and low-pressure turbines used in the steam power plant 10 according to FIG. 1 are designed for steam conditions customary for such turbines.
  • High-pressure turbines are usually designed for a temperature of 520 to 600 ° C and a pressure of 120 to 300 bar.
  • Medium-pressure turbines are generally designed to hold 520 to 620 ° C hot steam at a pressure of 30 to 60 bar.
  • Low-pressure turbines are usually designed for 4 to 10 bar pressure.
  • a steam power plant 12 is shown after retrofitting according to the invention to increase the power and efficiency of the steam power plant.
  • Elements of the steam power plant 12 that correspond to corresponding elements of the steam power plant 10 shown in FIG. 1 are identified by the same reference numerals. With regard to their function, reference is made to the comments with respect to FIG. 1.
  • the steam power plant 12 is compared to the steam power plant 10 initially equipped with a steam generator 14 downstream of the additional steam heater 14 'for additional heating of the live steam to about 700 ° C.
  • the function of the additional steam heater 14 ' can also be integrated into the main steam generator 14.
  • the steam generator 14 may be provided with additional superheater surfaces for higher steam conditions, or may be designed for higher steam conditions when the steam power plant shown in FIG. 2 is newly manufactured.
  • the steam power plant 12 is equipped with a arranged on an auxiliary drive shaft 32 first auxiliary turbine 30 or retrofitted.
  • the first auxiliary turbine 30 is designed as a high pressure turbine designed to receive 700 ° C hot steam.
  • the fresh steam supplied at a temperature of about 700 ° C. expands and cools down to 560 ° C. to 620 ° C.
  • the first auxiliary turbine 30 drives an additional electric generator 36 via the auxiliary drive shaft 32.
  • the expanded steam is then directed via a steam line 16 into the first main turbine 18.
  • the steam is supplied to the reheater 22 and a downstream auxiliary reheater 22 '.
  • the additional reheater 22' may also be functionally integrated into the reheater 22. This can also be accomplished here with additional superheater surfaces in the reheater 22.
  • the steam After passing through the additional reheater 22 ', the steam is at a temperature of approximately 720 ° C. and is then introduced into a second auxiliary turbine 34, which is designed as a medium-pressure turbine and is designed for a steam temperature above 720 ° C.
  • the second auxiliary turbine 34 is also arranged on the auxiliary drive shaft 32.
  • the arrangement of a plurality of drive shafts according to the steam power plant 12 with the main drive shaft 20 and the auxiliary drive shaft 32 is also referred to as a multi-shaft arrangement.
  • the second auxiliary turbine 34 exerts a further torque on the auxiliary drive shaft 32.
  • the first auxiliary turbine 30 and the second auxiliary turbine 34 are designed for a speed that is twice as high as the rated speed of the main turbines 18, 24 and 26.
  • the auxiliary drive shaft 32 is at a frequency of 100 Hz relative to a drive frequency of the main drive shaft 20 powered by 50 Hz.
  • the additional electric generator 36 is coupled to the main electric generator 28 via an electric speed converter (not shown in the drawing).
  • the auxiliary drive shaft 32 and the main drive shaft 20 may also be coupled by means of a mechanical speed converter (transmission). In this case, only one electrical generator is necessary to convert the mechanical energy into electrical current.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Turbines (AREA)
  • Control Of Eletrric Generators (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
EP05022606A 2005-10-17 2005-10-17 Centrale à vapeur et procédé pour réaménager une centrale à vapeur Withdrawn EP1775430A1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP05022606A EP1775430A1 (fr) 2005-10-17 2005-10-17 Centrale à vapeur et procédé pour réaménager une centrale à vapeur
US12/083,668 US7975483B2 (en) 2005-10-17 2006-10-05 Steam power plant and also method for retrofitting a steam power plant
EP06807006.9A EP1937942B1 (fr) 2005-10-17 2006-10-05 Centrale à vapeur et procédé pour réaménager une centrale à vapeur
PL06807006T PL1937942T3 (pl) 2005-10-17 2006-10-05 Siłownia parowa i sposób doposażania siłowni parowej
CN2006800385510A CN101292075B (zh) 2005-10-17 2006-10-05 蒸汽发电设备以及改造蒸汽发电设备的方法
JP2008534998A JP4833293B2 (ja) 2005-10-17 2006-10-05 蒸気タービン発電所並びに蒸気タービン発電所の増設方法
PCT/EP2006/067096 WO2007045563A2 (fr) 2005-10-17 2006-10-05 Centrale thermique a vapeur et procede pour la moderniser

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05022606A EP1775430A1 (fr) 2005-10-17 2005-10-17 Centrale à vapeur et procédé pour réaménager une centrale à vapeur

Publications (1)

Publication Number Publication Date
EP1775430A1 true EP1775430A1 (fr) 2007-04-18

Family

ID=36513498

Family Applications (2)

Application Number Title Priority Date Filing Date
EP05022606A Withdrawn EP1775430A1 (fr) 2005-10-17 2005-10-17 Centrale à vapeur et procédé pour réaménager une centrale à vapeur
EP06807006.9A Not-in-force EP1937942B1 (fr) 2005-10-17 2006-10-05 Centrale à vapeur et procédé pour réaménager une centrale à vapeur

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP06807006.9A Not-in-force EP1937942B1 (fr) 2005-10-17 2006-10-05 Centrale à vapeur et procédé pour réaménager une centrale à vapeur

Country Status (6)

Country Link
US (1) US7975483B2 (fr)
EP (2) EP1775430A1 (fr)
JP (1) JP4833293B2 (fr)
CN (1) CN101292075B (fr)
PL (1) PL1937942T3 (fr)
WO (1) WO2007045563A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009118332A2 (fr) * 2008-03-25 2009-10-01 Alstom Technology Ltd Centrale électrique et procédé de fonctionnement
JP2018053896A (ja) * 2007-04-27 2018-04-05 ▲偉▼忠 ▲馮▼ 新型のタービン発電機ユニット

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2304118B1 (es) * 2008-02-25 2009-07-29 Sener Grupo De Ingenieria, S.A Procedimiento para generar energia mediante ciclos termicos con vapor de presion elevada y temperatura moderada.
EP2147896A1 (fr) * 2008-07-22 2010-01-27 Uhde GmbH Procedé à basse énergie pour la production d'ammoniac ou de méthanol
JP4898955B2 (ja) 2008-08-11 2012-03-21 三菱重工業株式会社 蒸気タービン設備
EP2180149B1 (fr) * 2008-08-11 2016-12-21 Mitsubishi Hitachi Power Systems, Ltd. Ensemble turbine à vapeur
EP2685055A1 (fr) * 2012-07-12 2014-01-15 Siemens Aktiengesellschaft Procédé destiné au soutien d'une fréquence du réseau
JP2014239604A (ja) * 2013-06-07 2014-12-18 株式会社神戸製鋼所 発電装置
EP3262284B1 (fr) * 2015-02-24 2019-01-02 Siemens Aktiengesellschaft Centrale électrique à cycle combiné comportant une turbine à vapeur supercritique

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE820600C (de) * 1950-05-21 1951-11-12 Grosskraftwerk Mannheim A G Dampfkraftanlage, deren Kessel seine Verbrennungsluft aus einer Luftturbine erhaelt
FR1511106A (fr) * 1966-12-15 1968-01-26 Steinmueller Gmbh L & C Procédé de réglage des températures de vapeur dans les processus de fonctionnement de machines à vapeur comportant un ou plusieurs surchauffages intermédiaires
JPH03189333A (ja) * 1989-12-18 1991-08-19 Jinichi Nishiwaki 水冷却式ガスタービン装置
US5533337A (en) * 1993-07-23 1996-07-09 Hitachi, Ltd. Feed water supply system of power plant
EP1445429A1 (fr) * 2003-02-07 2004-08-11 Elsam Engineering A/S Système de turbines à vapeur

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US1971818A (en) * 1931-09-11 1934-08-28 Gen Electric Frequency and load control of alternating current systems
US2467092A (en) * 1944-12-16 1949-04-12 Comb Eng Superheater Inc Steam power plant
US2504640A (en) * 1948-07-03 1950-04-18 Westinghouse Electric Corp Reheat turbine control
US2540691A (en) * 1948-08-19 1951-02-06 Westinghouse Electric Corp Valve control of reheat turbine installation
US4007596A (en) * 1975-04-24 1977-02-15 Westinghouse Electric Corporation Dual turbine power plant and method of operating such plant, especially one having an HTGR steam supply
JPH04171202A (ja) * 1990-11-06 1992-06-18 Toshiba Corp 蒸気タービン発電プラント
JP3315800B2 (ja) * 1994-02-22 2002-08-19 株式会社日立製作所 蒸気タービン発電プラント及び蒸気タービン
JP3977546B2 (ja) * 1999-03-25 2007-09-19 株式会社東芝 蒸気タービン発電設備
JP3095745B1 (ja) * 1999-09-09 2000-10-10 三菱重工業株式会社 超高温発電システム
JP2002221007A (ja) * 2001-01-23 2002-08-09 Toshiba Corp 火力発電プラント
JP2002247759A (ja) * 2001-02-21 2002-08-30 Toshiba Eng Co Ltd 電源装置および高周波電源装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE820600C (de) * 1950-05-21 1951-11-12 Grosskraftwerk Mannheim A G Dampfkraftanlage, deren Kessel seine Verbrennungsluft aus einer Luftturbine erhaelt
FR1511106A (fr) * 1966-12-15 1968-01-26 Steinmueller Gmbh L & C Procédé de réglage des températures de vapeur dans les processus de fonctionnement de machines à vapeur comportant un ou plusieurs surchauffages intermédiaires
JPH03189333A (ja) * 1989-12-18 1991-08-19 Jinichi Nishiwaki 水冷却式ガスタービン装置
US5533337A (en) * 1993-07-23 1996-07-09 Hitachi, Ltd. Feed water supply system of power plant
EP1445429A1 (fr) * 2003-02-07 2004-08-11 Elsam Engineering A/S Système de turbines à vapeur

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Title
PATENT ABSTRACTS OF JAPAN vol. 015, no. 447 (M - 1179) 14 November 1991 (1991-11-14) *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018053896A (ja) * 2007-04-27 2018-04-05 ▲偉▼忠 ▲馮▼ 新型のタービン発電機ユニット
WO2009118332A2 (fr) * 2008-03-25 2009-10-01 Alstom Technology Ltd Centrale électrique et procédé de fonctionnement
US8247919B2 (en) 2008-03-25 2012-08-21 Alstom Technology Ltd. Power station with grid frequency linked turbine and method for operating
WO2009118332A3 (fr) * 2008-03-25 2014-12-24 Alstom Technology Ltd Centrale électrique et procédé de fonctionnement

Also Published As

Publication number Publication date
JP2009511810A (ja) 2009-03-19
EP1937942B1 (fr) 2016-09-14
WO2007045563A2 (fr) 2007-04-26
US7975483B2 (en) 2011-07-12
CN101292075B (zh) 2011-09-28
US20090229267A1 (en) 2009-09-17
EP1937942A2 (fr) 2008-07-02
PL1937942T3 (pl) 2017-04-28
CN101292075A (zh) 2008-10-22
WO2007045563A3 (fr) 2007-09-13
JP4833293B2 (ja) 2011-12-07

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