EP2362073A1 - Centrale à vapeur comprenant une turbine de réglage - Google Patents

Centrale à vapeur comprenant une turbine de réglage Download PDF

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Publication number
EP2362073A1
EP2362073A1 EP10164091A EP10164091A EP2362073A1 EP 2362073 A1 EP2362073 A1 EP 2362073A1 EP 10164091 A EP10164091 A EP 10164091A EP 10164091 A EP10164091 A EP 10164091A EP 2362073 A1 EP2362073 A1 EP 2362073A1
Authority
EP
European Patent Office
Prior art keywords
turbine
steam
main
feed pump
tuning
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Withdrawn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
EP10164091A
Other languages
German (de)
English (en)
Inventor
Tilman Früh
Detlef Haje
Michael Wechsung
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 PCT/EP2011/052583 priority Critical patent/WO2011104223A1/fr
Priority to CN201180010808.2A priority patent/CN102770625B/zh
Priority to EP11706801A priority patent/EP2539550A1/fr
Publication of EP2362073A1 publication Critical patent/EP2362073A1/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Withdrawn legal-status Critical Current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
    • F01K9/00—Plants characterised by condensers arranged or modified to co-operate with the engines
    • F01K9/02—Arrangements or modifications of condensate or air pumps
    • 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
    • F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
    • F01K17/06—Returning energy of steam, in exchanged form, to process, e.g. use of exhaust steam for drying solid fuel or plant

Definitions

  • the invention relates to a steam power plant comprising a main turbine, a condenser, a feedwater pump, a tuning turbine for driving the feedwater pump, wherein the tuning turbine is designed as a steam turbine, wherein a steam outlet is fluidically connected to a steam supply from the turbo set.
  • feedwater is used to convert in a steam generator to compressed and high-temperature steam, which is then thermally converted in a main steam turbine set.
  • the feed water is pumped by means of so-called boiler feed pumps against the resistance of the live steam pressure in the boiler or steam generator.
  • boiler feed pumps are powered by steam turbines and referred to as feed pump power turbine (SPAT).
  • PAT feed pump power turbine
  • a corresponding reserve is taken into account and kept in reserve during the construction or switching of the feed pump drive turbine.
  • the feed pump power turbine is fed from a tap of the main steam turbine (at a pressure level between 10 and 15 bar) and then expanded to a condenser level.
  • the feed pump drive turbine can in this case have its own capacitor or the exhaust steam of the feed pump drive turbine is on the condenser of the main steam turbine directed.
  • the feed pump drive turbine is additionally fed from a tap having a higher pressure (typically from cold reheat).
  • the problem is when the feed pump drive turbine is designed as a so-called tuning turbine with a feed from a top tap of the main steam turbine and exhaust steam on a regenerative preheater. Because in this case, an increase in performance by switching to a higher pressure in the tap is not possible.
  • One possible technical solution for ensuring the power reserve is a sufficient pre-throttling of the feed pump drive turbine in nominal operation. However, such throttling is a drawback from the standpoint of efficiency in continuous operation.
  • the object of the invention is to better utilize a feed pump drive turbine.
  • a changeover can also be made to a preheater (lower in terms of pressure).
  • the exhaust steam of the feed pump drive turbine can be introduced into a line section or a turbine housing of the main steam turbine.
  • control measures must be taken to ensure a safe shutdown in case of a quick closing of the main steam turbine, z. B. by double barriers, instrumentation execution according to the safety significance.
  • the preheater or the feed point is selected specifically as a function of the feed pump power requirement. This could also be called “Wanderabdampf”.
  • the tuning turbine or feed pump drive turbine is designed with taps, which serve for regenerative feedwater preheating the steam power plant.
  • a significant advantage is that the new solution offers an efficiency optimized circuit for rated operation, in which the tuning turbine or feed pump drive turbine can be operated without substantial throttling (thereby high efficiency in long-term rated operation or in the upper part-load operation). This advantage also ensures the safe operation of the main turbine set and the tuning turbine or feed pump drive turbine in special load cases such as bypass operation of the main steam turbine.
  • a parallel support of one or more preheaters including the feed water tank which are supplied by taps or exhaust steam of the feed pump drive turbine from the main turbo set or the water-steam cycle.
  • bleed mass flows can be reduced and replaced by backup mass flows.
  • the tuning turbine or feed pump drive turbine is designed with a throttle reserve that can cover typical long-term operating modes without switching to the capacitor.
  • the power requirement is achieved by increasing the slope not by increased pressure at the entrance, but by lowering the back pressure.
  • An increase in the pressure at the inlet would only be possible by supporting the feed pump drive turbine from the live steam, but this would mean that the feed pump drive turbine would have to cope with a large temperature jump and would have to be designed for comparatively high inlet temperatures.
  • An advantage of the invention is that the component stress and the efficiency and the operability of a steam power plant is improved.
  • the invention can be used in a special way for the application in efficiency critical large power plants with single or double reheat.
  • the FIG. 1 shows a steam power plant 1 according to the prior art.
  • the steam power plant 1 comprises a main turbine set 2, which comprises a high-pressure turbine section 3, a first medium-pressure turbine section 4 and a second medium-pressure turbine section 5 and a low-pressure turbine section 6.
  • the high-pressure turbine part 3 is supplied via a main steam line 7 with a steam generator or boiler 8 with live steam.
  • the effluent from the high-pressure turbine section 3 steam is passed in a cold reheater line 9 to a first reheater 10.
  • the steam is heated and then passed through a hot reheater line 11 to the first medium-pressure turbine section 4.
  • the effluent from the first medium-pressure turbine section 4 steam is passed through a further cold reheater line 12 in a second reheater 13. This steam is in turn heated and passed through another hot reheater line 14 to the second medium-pressure turbine section 5.
  • the effluent from the second medium-pressure turbine section 5 steam relaxes in a low-pressure turbine section 6 and then flows into a main capacitor 15.
  • In the main capacitor 15 condenses the relaxed Steam to water and is fed via a first line 16 to a feedwater pump 17.
  • the feedwater pump 17 the water is pressed against the live steam pressure in the steam generator or boiler 8.
  • the feed water pump is driven by a feed pump drive turbine (SPAT), which can also be called a tuning turbine.
  • SPAT feed pump drive turbine
  • the feed pump drive turbine 18 is designed as a steam turbine and is fresh steam side 19 via a throttle body 20 with the cold reheater line 19 fluidly connected.
  • the thermal energy of the located in the cold reheater line 9 cold reheater steam relaxes in the feed pump drive turbine 18 and drives a rotor 21, not shown, which finally drives the feedwater pump 17.
  • the feed pump drive turbine 18 has a tap 22, from which steam is conducted to a further condenser 23.
  • the steam conducted in this further condenser 23 condenses to water and flows via a second line 24 to a preheater 25.
  • the outlet-side exhaust steam 26 also flows via an exhaust steam line 27 to the preheater 25 and preheats the feed water.
  • the throttle member 22 is strongly throttled in the prior art for a power or speed control in normal operation.
  • the exhaust steam of the feed pump drive turbine 18 is passed to the preheater 25 in normal operation.
  • the main turboset 2 finally drives an electric generator 28 for generating electrical energy.
  • FIG. 2 shows a steam power plant 1 according to the invention.
  • the difference from the steam power plant 1 according to the prior art is that the steam line 27 is additionally guided via a Kondensatorabdampftechnisch 29 to the main capacitor 15. This means that the effluent from the feed pump drive turbine 18 steam can flow to both the preheater 25 and the main capacitor 15.
  • a second throttle body 30 is arranged in the Kondensatorabdampf.
  • the throttle body 30 opens 100% in a certain operating condition and thus gives the first throttle member 20 before the feed pump drive turbine 18 a greater control margin.
  • the exhaust steam of the feed pump drive turbine 18 is passed to the main capacitor 15 at an increased power requirement of the feedwater pump.
  • a support line 31, which connects the cold reheater line 12 to an input 32 of the preheater 25, are arranged.
  • the FIG. 3 shows the relationship between the power 33 and the valve lift 34.
  • the first straight line 35 shows the curve of the power over the valve lift 34 when the capacitor switchover is open.
  • the second line 36 shows the power over the valve lift 34 when the capacitor switch is closed.
EP10164091A 2010-02-23 2010-05-27 Centrale à vapeur comprenant une turbine de réglage Withdrawn EP2362073A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PCT/EP2011/052583 WO2011104223A1 (fr) 2010-02-23 2011-02-22 Centrale thermique à vapeur comprenant une turbine de réglage
CN201180010808.2A CN102770625B (zh) 2010-02-23 2011-02-22 火力发电站和用于运行其中的调整式涡轮机的方法
EP11706801A EP2539550A1 (fr) 2010-02-23 2011-02-22 Centrale thermique à vapeur comprenant une turbine de réglage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201010009130 DE102010009130A1 (de) 2010-02-23 2010-02-23 Dampfkraftwerk umfassend eine Tuning-Turbine

Publications (1)

Publication Number Publication Date
EP2362073A1 true EP2362073A1 (fr) 2011-08-31

Family

ID=42989443

Family Applications (2)

Application Number Title Priority Date Filing Date
EP10164091A Withdrawn EP2362073A1 (fr) 2010-02-23 2010-05-27 Centrale à vapeur comprenant une turbine de réglage
EP11706801A Withdrawn EP2539550A1 (fr) 2010-02-23 2011-02-22 Centrale thermique à vapeur comprenant une turbine de réglage

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP11706801A Withdrawn EP2539550A1 (fr) 2010-02-23 2011-02-22 Centrale thermique à vapeur comprenant une turbine de réglage

Country Status (4)

Country Link
EP (2) EP2362073A1 (fr)
CN (1) CN102770625B (fr)
DE (1) DE102010009130A1 (fr)
WO (1) WO2011104223A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2444596A3 (fr) * 2010-10-19 2017-08-02 Kabushiki Kaisha Toshiba Centrale à turbine à vapeur
WO2018010878A1 (fr) * 2016-07-11 2018-01-18 Siemens Aktiengesellschaft Installation de production d'électricité à préchauffage optimisé de l'eau d'alimentation pour turbogénérateurs montés à une faible hauteur

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103485848A (zh) * 2013-09-30 2014-01-01 中国电力工程顾问集团华东电力设计院 与一次再热主汽轮机同轴布置的背压抽汽小汽轮机热力系统
CN103485849A (zh) * 2013-09-30 2014-01-01 中国电力工程顾问集团华东电力设计院 与二次再热主汽轮机同轴布置的背压抽汽小汽轮机热力系统
GB2519129A (en) * 2013-10-10 2015-04-15 Ide Technologies Ltd Pumping Apparatus

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3972196A (en) * 1974-05-10 1976-08-03 Westinghouse Electric Corporation Steam pressure increasing device for drive turbines
US4043130A (en) * 1975-02-10 1977-08-23 Westinghouse Electric Corporation Turbine generator cycle for provision of heat to an external heat load
US4087860A (en) * 1977-07-08 1978-05-02 Westinghouse Electric Corp. System for multi-mode control of a boiler feedpump turbine
JPS58143106A (ja) * 1982-02-19 1983-08-25 Toshiba Corp 給水ポンプタ−ビン装置
WO1994027033A1 (fr) * 1993-05-14 1994-11-24 Sevillana De Electricidad, S.A. Recyclage des gas d'echappement d'une turbine a gaz pour le second rechauffement intermediaire du flux principal d'un cycle de vapeur d'eau
US5404724A (en) * 1994-04-07 1995-04-11 Westinghouse Electric Corporation Boiler feedpump turbine drive/feedwater train arrangement
DE19507167C1 (de) * 1995-03-01 1996-05-02 Siemens Ag Dampfturbinenanlage
US5533337A (en) * 1993-07-23 1996-07-09 Hitachi, Ltd. Feed water supply system of power plant

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3972196A (en) * 1974-05-10 1976-08-03 Westinghouse Electric Corporation Steam pressure increasing device for drive turbines
US4043130A (en) * 1975-02-10 1977-08-23 Westinghouse Electric Corporation Turbine generator cycle for provision of heat to an external heat load
US4087860A (en) * 1977-07-08 1978-05-02 Westinghouse Electric Corp. System for multi-mode control of a boiler feedpump turbine
JPS58143106A (ja) * 1982-02-19 1983-08-25 Toshiba Corp 給水ポンプタ−ビン装置
WO1994027033A1 (fr) * 1993-05-14 1994-11-24 Sevillana De Electricidad, S.A. Recyclage des gas d'echappement d'une turbine a gaz pour le second rechauffement intermediaire du flux principal d'un cycle de vapeur d'eau
US5533337A (en) * 1993-07-23 1996-07-09 Hitachi, Ltd. Feed water supply system of power plant
US5404724A (en) * 1994-04-07 1995-04-11 Westinghouse Electric Corporation Boiler feedpump turbine drive/feedwater train arrangement
DE19507167C1 (de) * 1995-03-01 1996-05-02 Siemens Ag Dampfturbinenanlage

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2444596A3 (fr) * 2010-10-19 2017-08-02 Kabushiki Kaisha Toshiba Centrale à turbine à vapeur
WO2018010878A1 (fr) * 2016-07-11 2018-01-18 Siemens Aktiengesellschaft Installation de production d'électricité à préchauffage optimisé de l'eau d'alimentation pour turbogénérateurs montés à une faible hauteur

Also Published As

Publication number Publication date
WO2011104223A1 (fr) 2011-09-01
CN102770625B (zh) 2015-12-02
CN102770625A (zh) 2012-11-07
EP2539550A1 (fr) 2013-01-02
DE102010009130A1 (de) 2011-08-25

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