EP2539550A1 - Centrale thermique à vapeur comprenant une turbine de réglage - Google Patents

Centrale thermique à vapeur comprenant une turbine de réglage

Info

Publication number
EP2539550A1
EP2539550A1 EP11706801A EP11706801A EP2539550A1 EP 2539550 A1 EP2539550 A1 EP 2539550A1 EP 11706801 A EP11706801 A EP 11706801A EP 11706801 A EP11706801 A EP 11706801A EP 2539550 A1 EP2539550 A1 EP 2539550A1
Authority
EP
European Patent Office
Prior art keywords
turbine
steam
main
power plant
feed pump
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Withdrawn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
EP11706801A
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 EP11706801A priority Critical patent/EP2539550A1/fr
Publication of EP2539550A1 publication Critical patent/EP2539550A1/fr
Withdrawn legal-status Critical Current

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
    • 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 turbo set, 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 with a steam supply from the turbo ⁇ set fluidically connected.
  • feedwater is used to convert in a steam generator to compressed and high-temperature steam, which is then thermally converted in a steam main turbo set.
  • the feed water is pumped by means of so-called boiler feed pumps against the resistance of the live steam pressure in the Kes ⁇ sel or steam generator.
  • these boiler feed pumps are powered by steam turbines and referred to as the feed pump power turbine (SPAT).
  • the feed pump power turbine PAT
  • the boiler feed pump requires a 20% to 30% increase in power consumption (bypass operation of the main turbo set). This increased power requirement must be ensured by the
  • Feed pump drive turbine can be provided.
  • a corresponding reserve is taken into account and kept available in the design or circuit of the feed pump drive turbine.
  • the feed pump drive turbine is fed from a tap of the main ⁇ steam turbine (at a pressure level between 10 and 15 bar) and then expan ⁇ diert to a condenser level.
  • the feed pump drive turbine can in this case have its own condenser or the exhaust steam of the feed pump drive turbine is fed to the condenser of the main steam turbine. bine.
  • the feed pump drive turbine is additionally supplied from a tap which has a higher pressure (typi cally ⁇ from the cold intermediate superheating).
  • the feed pump drive turbine is designed as a so-called tuning turbine with a power from a deviss ⁇ th tap of the main steam turbine and exhaust steam to 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. But such a throttling is in part, from the standpoint of the efficiency forth in continuous operation, a post ⁇ .
  • the object of the invention is to better utilize a feed pump drive turbine.
  • Tuning turbine in a steam power plant takes place in the event that throttle bodies before the feed pump drive turbine are already fully or fully open, by switching the exhaust steam on the main ⁇ capacitor.
  • a throttle body between the feed pump drive turbine exhaust steam and condenser must set the back pressure so that either this throttle body takes over the power or speed control or the pressure at the feed pump drive turbine exhaust steam is lowered so that on the one hand the blading of the feed pumps Antriebs- turbine is not overloaded and on the other hand, the throttle ⁇ organs in front of the feed pump drive turbine again
  • exhaust steam from the feed pump drive turbine may cut in a matched line or a ⁇ be routed to a turbine casing 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 the regenerative feedwater preheating of the steam power plant.
  • an adapted temperature of the bleed steam is achieved and an exergy loss for the feedwater pre-heating avoided, which has an advantageous effect on the overall efficiency of the entire system.
  • the new solution offers a ⁇ We ciency optimized circuit for rated operation, wherein the tuning turbine or feed pump drive turbine can be operated without a substantial throttling (DA through 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 the case of special load traps such as bypass operation of the main steam turbine.
  • the tuning turbine or feed pump drive turbine In order to enable safe and reliable operation of the tuning turbine or feed pump drive turbine even with different loan requirements of the main turbo set, is a parallel support of one or more preheaters including the feed water tank, which supplies by tapping or Abdampf the feed pump drive turbine ⁇ to provide from the main turbo set or the water-steam cycle.
  • preheaters including the feed water tank, which supplies by tapping or Abdampf the feed pump drive turbine ⁇ to provide 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, the typical long term langzei ⁇ modes can cover without switching to the condenser.
  • the power demand is by increasing the gap not due to increased pressure at the inlet reali ⁇ Siert, 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 Bauteilbe ⁇ claim and the efficiency and 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 intermediate overheating.
  • Figure 1 is a steam power plant according to the prior art
  • FIG. 2 shows a steam power plant according to the invention
  • Figure 3 is a graph of performance over 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 part ⁇ turbine 3 is connected via a main steam line 7 with a
  • Steam generator or boiler 8 supplied 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 Zwi ⁇ rule superheater line 11 to the first medium-pressure turbine section 4.
  • Comprised of the first intermediate-pressure turbine section 4 flows from ⁇ vapor is passed over a further cold intermediate superheater line ⁇ 12 in a second intermediate superheater. 13
  • This steam is in turn heated and passed over a white ⁇ hot reheater line 14 to the second medium-pressure turbine section 5.
  • the 5 flowing out of the second intermediate-pressure turbine steam expands in a low ⁇ pressure turbine section 6 and then flows into a main ⁇ capacitor 15.
  • the main condenser 15 corresponds to the condensed clamped steam to water and is fed via a first line 16 to a feedwater pump 17.
  • the feed water pump is driven by a feed pump drive turbine (SPAT), which can also be called a tuning turbine.
  • the feed pump drive turbine 18 is designed as a steam turbine and fresh-steam side 19 via a Drosselor ⁇ gan 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 heats the
  • 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 led to the main capacitor 15 via a condenser steam line 29.
  • a second throttle body 30 is arranged.
  • the throttle member 30 opens to 100% in a certain operating condition and thus gives the first throttle member 20 in front of the feed pump drive turbine 18 a larger rule ⁇ scope.
  • 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, can be arranged.
  • FIG. 3 shows the relationship between the power 33 and the valve lift 34.
  • the first straight line 35 shows the course of the power over the valve lift 34 when the capacitor changeover is open.
  • the second line 36 shows the power over the valve lift 34 when the capacitor switch is closed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Turbines (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)

Abstract

L'invention concerne une centrale thermique à vapeur (1) équipée d'une turbine d'entraînement (18) de pompe d'alimentation qui est en outre reliée côté sortie à un condenseur principal (15).
EP11706801A 2010-02-23 2011-02-22 Centrale thermique à vapeur comprenant une turbine de réglage Withdrawn EP2539550A1 (fr)

Priority Applications (1)

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

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE201010009130 DE102010009130A1 (de) 2010-02-23 2010-02-23 Dampfkraftwerk umfassend eine Tuning-Turbine
EP10164091A EP2362073A1 (fr) 2010-02-23 2010-05-27 Centrale à vapeur comprenant une turbine de réglage
PCT/EP2011/052583 WO2011104223A1 (fr) 2010-02-23 2011-02-22 Centrale thermique à vapeur comprenant une turbine de réglage
EP11706801A EP2539550A1 (fr) 2010-02-23 2011-02-22 Centrale thermique à vapeur comprenant une turbine de réglage

Publications (1)

Publication Number Publication Date
EP2539550A1 true EP2539550A1 (fr) 2013-01-02

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 Before (1)

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

Country Status (4)

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

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5912323B2 (ja) * 2010-10-19 2016-04-27 株式会社東芝 蒸気タービンプラント
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
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
GB2519129A (en) * 2013-10-10 2015-04-15 Ide Technologies Ltd Pumping Apparatus
DE102016214960B3 (de) * 2016-07-11 2017-07-06 Siemens Aktiengesellschaft Kraftwerksanlage mit optimierter Vorwärmung von Speisewasser für tiefaufgestellte Turbosätze

Family Cites Families (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
ES2116139B1 (es) * 1993-05-14 1999-04-16 Rosado Serafin Mendoza Perfeccionamientos introducidos en la patente de invencion n- 9301044 titulada un procedimiento de mejora para centrales electricas de ciclo combinado con aporte paralelo de energia al ciclo de vapor en una caldera de combustible fosil.
JP3279740B2 (ja) * 1993-07-23 2002-04-30 株式会社日立製作所 発電プラントの給水装置
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2011104223A1 *

Also Published As

Publication number Publication date
CN102770625A (zh) 2012-11-07
CN102770625B (zh) 2015-12-02
EP2362073A1 (fr) 2011-08-31
WO2011104223A1 (fr) 2011-09-01
DE102010009130A1 (de) 2011-08-25

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