EP0847482B1 - Procede et dispositif pour le refroidissement de l'etage basse pression d'une turbine a vapeur - Google Patents

Procede et dispositif pour le refroidissement de l'etage basse pression d'une turbine a vapeur Download PDF

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Publication number
EP0847482B1
EP0847482B1 EP96934354A EP96934354A EP0847482B1 EP 0847482 B1 EP0847482 B1 EP 0847482B1 EP 96934354 A EP96934354 A EP 96934354A EP 96934354 A EP96934354 A EP 96934354A EP 0847482 B1 EP0847482 B1 EP 0847482B1
Authority
EP
European Patent Office
Prior art keywords
coolant
low
steam
water
cooling
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.)
Expired - Lifetime
Application number
EP96934354A
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German (de)
English (en)
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EP0847482A1 (fr
Inventor
Walter ZÖRNER
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
Publication of EP0847482A1 publication Critical patent/EP0847482A1/fr
Application granted granted Critical
Publication of EP0847482B1 publication Critical patent/EP0847482B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F01K13/00—General layout or general methods of operation of complete plants
    • F01K13/02—Controlling, e.g. stopping or starting
    • F01K13/025—Cooling the interior by injection during idling or stand-by
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D19/00—Starting of machines or engines; Regulating, controlling, or safety means in connection therewith
    • F01D19/02—Starting of machines or engines; Regulating, controlling, or safety means in connection therewith dependent on temperature of component parts, e.g. of turbine-casing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
    • F01D21/04—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for responsive to undesired position of rotor relative to stator or to breaking-off of a part of the rotor, e.g. indicating such position
    • F01D21/06—Shutting-down
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/08—Cooling; Heating; Heat-insulation
    • F01D25/12—Cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2240/00—Components
    • F05D2240/10—Stators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2260/00—Function
    • F05D2260/97—Reducing windage losses

Definitions

  • the invention relates to a method for cooling the Low-pressure turbine part in a water-steam cycle switched steam turbine, in which a coolant is the low-pressure sub-turbine, in particular when idling. It continues to focus on a device for Execution of the procedure.
  • a turbo set with a steam turbine is often like this designed that when heat is extracted from a Medium pressure turbine part or each low pressure turbine part receives no significant steam supply and therefore in idle mode is working.
  • this leads to high heating the blading in the low-pressure turbine section of the Heating steam turbine, especially with full heat extraction and shut-off low pressure turbine.
  • the invention is therefore based on the object, a particular one effective cooling of the low-pressure turbine, in particular in idle and / or low load operation. This is said to be suitable for carrying out the method Device can be achieved with particularly simple means.
  • the stated object is achieved according to the invention solved in that condensate is used as the coolant is the one downstream of the steam turbine condenser is removed, the coolant after Flow through the low-pressure part of the water-steam cycle is fed again after at least one Partial flow of the coolant is the one absorbed during cooling Has given off heat to the water-steam cycle while doing so itself has been cooled.
  • the invention is based on the consideration that a suitable Coolant for cooling the low-pressure turbine in idle or light load operation in addition to its property effective cooling as a further property the ability to recover as large as possible Share of the heat loss through ventilation of the turbine output stages having.
  • the coolant should be an appropriate have low temperature.
  • the capacitor to maintain a necessary vacuum even when idling the low-pressure turbine part is in operation is therefore the Particularly suitable for use of condensate as coolant especially since it also has a suitable temperature.
  • the coolant is expediently carried out in a closed manner Cooling loop. It is useful that Coolant through in the or each vane of the Low pressure sub-turbine guided channels. Alternatively The coolant can also flow through the inside of the housing Low pressure sub-turbine provided channels, i.e. along from Outer or inner contours of the inner housing.
  • the warmed up coolant becomes the water-steam cycle supplied, this is done in terms of its pressure and Temperature at a suitable point and by regulating the final temperature of the warmed up coolant. With one particularly suitable regulation of the final temperature of the coolant the coolant flow supplied to the low-pressure sub-turbine set.
  • the stated object is achieved in that in the coolant line in the flow direction behind the Low-pressure turbine part of a heat exchanger on the primary side is switched, the secondary side in the water-steam cycle is switched.
  • the coolant line is expediently connected directly to the the condensate collector provided below the condenser or Hotwell connected. With repatriation of the warmed-up coolant into the water-steam cycle
  • the coolant line is expedient at a suitable point connected to the pressure side of one in the water-steam cycle Condensate pump connected.
  • a circulation pump can be switched into the coolant line his. Switching on a circulation pump is special useful if the coolant in a separate cooling loop with connection of the coolant line directly to the Hotwell of the capacitor is led.
  • FIG. 1 shows schematically only the final stage of a steam turbine 1 with a double-flow low-pressure turbine section 2 and a capacitor 4 and arranged below this its collection container or Hotwell 6 for condensate K.
  • This is via a condensate line 8 with a condensate pump 10 into a water-steam cycle shown only in the detail 12 of the steam turbine 1 switched.
  • the condensate line 8 opens out via a first preheater 14 and a second preheater 16 into a also in the water-steam cycle 12 switched feed water tank 18.
  • condensate K flows out of the Hotwell 6 of the capacitor 4 via the condensate line 8 and the condensate pump 10 and the preheaters 14 and 16 in the feed water tank 18 where it is collected and usually is degassed. From there it is called feed water S in not shown in the water-steam cycle 12 switched evaporator and superheater heating surfaces for generating steam for the steam turbine 1 supplied.
  • feed water S in not shown in the water-steam cycle 12 switched evaporator and superheater heating surfaces for generating steam for the steam turbine 1 supplied.
  • the steam becomes working in the steam turbine 1 relaxed and then passed into the condenser 4 where he condenses.
  • the condensate 4 is collected in the Hotwell 6.
  • a partial flow t 1 of the condensate K from the hotwell 6 of the condenser 4 is fed to the low-pressure sub-turbine 2 via a coolant line 22 connected to the condensate line 8 on the pressure side of the condensate pump 10.
  • the amount of condensate or coolant K ′ passed through the coolant line 22 per unit of time, ie the coolant flow, is set.
  • the coolant K ' flows through guide vanes 24 of the low-pressure turbine section 2, only two of which are shown.
  • 24 channels are provided within the guide vanes in a manner not shown, which are networked together in a cooling loop.
  • the coolant K ′ can also flow through channels provided inside the inner housing 26 of the low-pressure turbine section 2, which can be outer or inner contours of the inner housing 26. This is indicated by the arrows 28.
  • a valve 30 is connected on the inflow side for setting the amount of coolant K ′ supplied to the low-pressure sub-turbine 2 per unit of time, ie for setting the partial condensate flow t 1 .
  • the coolant line 22 is guided on the outflow side, ie in the flow direction of the coolant K ′ behind the low-pressure sub-turbine 2, via the second preheater 16 and opens into the feed water tank 18. Between the low-pressure sub-turbine 2 and the second preheater 16 there is one in the coolant line 22 Check valve 32 switched.
  • the partial flow t 1 of the coolant K 'conducted via the coolant line 22 takes the heat from the low-pressure part-turbine 2, which is generated by ventilation in idle or low-load operation, when flowing through the guide vanes 24 and / or the inner housing 26 and passes this on to the second preheater 16 the condensate K flowing to the feed water tank 18.
  • the coolant K 'cooled in the process is mixed in the feed water tank 18 with the condensate K fed directly to it.
  • the coolant flow is varied by means of the valve 30.
  • measures a temperature sensor 34 the actual final temperature T K 'of the warmed coolant K' on the downstream side of the switched within the cooling loop in the refrigerant line 22 low-pressure turbine section 2.
  • a controller module 36 are connected via a signal line 38 a reference to the measured final temperature T K 'and a predeterminable target temperature determined control variable to the controllable valve 30 for setting the coolant flow t 1 .
  • the low-pressure turbine part 2 is cooled in a particularly simple manner in that condensate K as coolant K 'from the hotwell 6 of the condenser 4 via a circulation pump 40 connected into a coolant line 22' to the guide vanes 24 of the low-pressure Sub-turbine 2 is promoted.
  • a partial flow t 2 of the coolant K ', which is itself heated during cooling, is conducted via the partial flow line 42 connected to the coolant line 22' on the outflow side, into which a valve 44 is connected, via the conduit 4.
  • the amount of the coolant K 'taken from the hotwell 6 per unit of time is in turn set by means of the valve 30' connected into the coolant line 22 '.
  • the valve 30 ' is in turn controlled by the controller module 36 as a function of the end temperature T K' of the heated coolant K 'measured by means of the temperature sensor 34.
  • the remaining partial flow t 3 of the heated coolant K ' which can be adjusted by means of valves 48 and 50, is in turn passed through a heat exchanger or preheater 16', in turn releasing its heat at a suitable point in the water-steam circuit 12 of the steam turbine 1.
  • the coolant K ' is therefore conducted in a separate cooling circuit 52 which is closed directly via the condenser 4.

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

Abstract

L'invention concerne un procédé de refroidissement de l'étage basse pression d'une turbine à vapeur (1) montée dans une boucle eau/vapeur (12). L'agent de refroidissement (K') s'écoule à travers des parties (24) de l'étage basse pression (2), en particulier pendant la marche à vide. Afin que le refroidissement soit particulièrement efficace et qu'il soit simultanément possible de tirer profit de la chaleur ainsi obtenue, le condensat (K) provenant du condenseur (4) monté en aval de la turbine à vapeur (1) est utilisé comme agent de refroidissement (K'), le condensat cédant à la boucle eau/vapeur (12) la chaleur absorbée pendant le processus de refroidissement. A cet effet, l'étage basse pression est relié à une conduite d'agent de refroidissement (22, 22') qui est reliée à l'extrémité de sortie du condenseur (4) et qui comprend un échangeur de chaleur (16, 16') monté dans une boucle eau/vapeur (12).

Claims (10)

  1. Procédé de refroidissement de l'étage basse pression d'une turbine (1) à vapeur montée dans un circuit (12) eau-vapeur, dans lequel un fluide (K') de refroidissement passe, notamment en fonctionnement en marche à vide, dans un étage (2) de turbine basse pression, du produit (K) condensé prélevé d'un condenseur monté en aval de la turbine (1) à vapeur étant utilisé comme fluide (K') de refroidissement, et au moins un courant (t1, t3) partiel du fluide (K') de refroidissement étant, après passage dans l'étage (2) de turbine basse pression, d'abord refroidi en cédant de la chaleur au circuit (12) eau-vapeur et renvoyé ensuite au circuit (12) eau-vapeur.
  2. Procédé suivant la revendication 1, caractérisé en ce que le fluide (K') de refroidissement passe dans une aube (24) directrice ou dans chaque aube (24) directrice de l'étage (2) basse pression de la turbine.
  3. Procédé suivant la revendication 1 ou 2, caractérisé en ce que le fluide (K') de refroidissement passe dans des canaux prévus à l'intérieur de l'enveloppe (26) intérieure de l'étage (2) basse pression de la turbine.
  4. Procédé suivant l'une des revendications 1 à 3, caractérisé en ce que le fluide (K') de refroidissement passe dans un circuit (52) distinct de refroidissement en étant retourné au condenseur (4) après avoir passé dans l'étage basse pression de la turbine.
  5. Procédé suivant l'une des revendications 1 à 4, caractérisé en ce qu'il consiste, pour réguler la température (TK') finale du fluide (K') de refroidissement réchauffé à régler le courant (t1) de fluide de refroidissement.
  6. Dispositif de refroidissement de l'étage basse pression d'une turbine (1) à vapeur montée dans un circuit (12) eau-vapeur comprenant un condenseur (4) en aval, l'étage (2) basse pression de la turbine étant relié à un conduit (22, 22') de fluide de refroidissement pour le produit (K') condensé qui communique avec le côté aval du condenseur (4) et qui débouche dans le circuit eau-vapeur et il est monté du côté primaire dans le conduit (22, 22') du fluide de refroidissement en aval, dans le sens du courant, de l'étage (2) basse pression de la turbine, un échangeur de chaleur (16, 16') qui, pour la transmission de la chaleur contenue dans le produit (K') condensé, est monté du côté secondaire dans le circuit (12) eau-vapeur.
  7. Dispositif suivant la revendication 6, caractérisé en ce que le conduit (22, 22') de fluide de refroidissement est relié au puits (6) chaud du condenseur (4).
  8. Dispositif suivant l'une des revendications 6 ou 7, caractérisé en ce que le conduit (22) de fluide de refroidissement est relié au côté refoulement d'une pompe (10) pour du produit condensé monté dans le circuit (12) eau-vapeur.
  9. Dispositif suivant l'une des revendications 6 ou 7, caractérisé en ce qu'il est monté dans le conduit (22') du fluide de refroidissement une pompe (20) de recirculation.
  10. Dispositif suivant l'une des revendications 6 à 9, caractérisé par des moyens de régulation de la température (TK') finale du fluide (K') de refroidissement qui est chauffé lors du refroidissement.
EP96934354A 1995-08-31 1996-08-12 Procede et dispositif pour le refroidissement de l'etage basse pression d'une turbine a vapeur Expired - Lifetime EP0847482B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19532199 1995-08-31
DE19532199 1995-08-31
PCT/DE1996/001506 WO1997008431A1 (fr) 1995-08-31 1996-08-12 Procede et dispositif pour le refroidissement de l'etage basse pression d'une turbine a vapeur

Publications (2)

Publication Number Publication Date
EP0847482A1 EP0847482A1 (fr) 1998-06-17
EP0847482B1 true EP0847482B1 (fr) 2001-10-31

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ID=7770948

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96934354A Expired - Lifetime EP0847482B1 (fr) 1995-08-31 1996-08-12 Procede et dispositif pour le refroidissement de l'etage basse pression d'une turbine a vapeur

Country Status (12)

Country Link
US (1) US6094914A (fr)
EP (1) EP0847482B1 (fr)
JP (1) JP3866288B2 (fr)
KR (1) KR100437922B1 (fr)
CN (1) CN1076075C (fr)
DE (1) DE59608085D1 (fr)
ES (1) ES2166909T3 (fr)
IN (1) IN187336B (fr)
RU (1) RU2160368C2 (fr)
TW (1) TW312727B (fr)
UA (1) UA44799C2 (fr)
WO (1) WO1997008431A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112017001695B4 (de) 2016-03-30 2021-08-12 Mitsubishi Power, Ltd. Anlage und Betriebsverfahren dafür

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DE19926949B4 (de) 1999-06-14 2011-01-05 Alstom Kühlungsanordnung für Schaufeln einer Gasturbine
EP1152125A1 (fr) * 2000-05-05 2001-11-07 Siemens Aktiengesellschaft Méthode et dispositif pour le refroidissement de la partie antérieure de l'arbre d'une turbine à vapeur
ITTO20050281A1 (it) * 2005-04-27 2006-10-28 Ansaldo Energia Spa Impianto a turbina provvisto di un prelievo di vapore e di un sistema per raffreddare una sezione di turbina disposta a valle di tale prelievo
US8739541B2 (en) * 2010-09-29 2014-06-03 General Electric Company System and method for cooling an expander
EP2620604A1 (fr) 2012-01-25 2013-07-31 Siemens Aktiengesellschaft Procédé pour contrôler un processus de refroidissement de composants de turbine
JP5916431B2 (ja) * 2012-02-22 2016-05-11 三菱重工業株式会社 発電プラントおよびその運転方法
RU2540213C1 (ru) * 2013-07-18 2015-02-10 Открытое акционерное общество "Научно-производственное объединение по исследованию и проектированию энергетического оборудования им. И.И. Ползунова" (ОАО "НПО ЦКТИ") Часть низкого давления паровой турбины
CN107035439B (zh) * 2017-06-27 2023-09-12 中国船舶重工集团公司第七�三研究所 一种凝汽式汽轮机后汽缸冷却系统
US10626843B2 (en) * 2018-03-05 2020-04-21 Job Freedman Hybrid heat engine
US11542838B2 (en) 2020-09-03 2023-01-03 Job E. Freedman Hybrid heat engine system
CN113153456B (zh) * 2021-04-16 2023-05-12 西安交通大学 一种汽轮机静叶加热除湿试验系统

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CH488098A (de) * 1968-04-10 1970-03-31 Licentia Gmbh Einrichtung zur Kühlung der Flansche an den Gehäuseteilfugen von Sattdampf- oder Nassdampfturbinen
JPS58140408A (ja) * 1982-02-17 1983-08-20 Hitachi Ltd 蒸気タ−ビンの冷却装置
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112017001695B4 (de) 2016-03-30 2021-08-12 Mitsubishi Power, Ltd. Anlage und Betriebsverfahren dafür

Also Published As

Publication number Publication date
IN187336B (fr) 2002-03-30
EP0847482A1 (fr) 1998-06-17
JP3866288B2 (ja) 2007-01-10
DE59608085D1 (de) 2001-12-06
KR100437922B1 (ko) 2004-08-16
KR19990044185A (ko) 1999-06-25
RU2160368C2 (ru) 2000-12-10
WO1997008431A1 (fr) 1997-03-06
JPH11511222A (ja) 1999-09-28
US6094914A (en) 2000-08-01
UA44799C2 (uk) 2002-03-15
CN1194025A (zh) 1998-09-23
CN1076075C (zh) 2001-12-12
ES2166909T3 (es) 2002-05-01
TW312727B (fr) 1997-08-11

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