EP3087256B1 - Procédé de refroidissement d'une turbine à vapeur - Google Patents

Procédé de refroidissement d'une turbine à vapeur Download PDF

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Publication number
EP3087256B1
EP3087256B1 EP15703512.2A EP15703512A EP3087256B1 EP 3087256 B1 EP3087256 B1 EP 3087256B1 EP 15703512 A EP15703512 A EP 15703512A EP 3087256 B1 EP3087256 B1 EP 3087256B1
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EP
European Patent Office
Prior art keywords
cooling fluid
steam
closure member
line
valve
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.)
Active
Application number
EP15703512.2A
Other languages
German (de)
English (en)
Other versions
EP3087256A2 (fr
Inventor
Edwin Gobrecht
Stefan Riemann
Gerta Zimmer
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 PL15703512T priority Critical patent/PL3087256T3/pl
Priority to EP15703512.2A priority patent/EP3087256B1/fr
Publication of EP3087256A2 publication Critical patent/EP3087256A2/fr
Application granted granted Critical
Publication of EP3087256B1 publication Critical patent/EP3087256B1/fr
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Classifications

    • 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
    • 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
    • F01D25/32—Collecting of condensation water; Drainage ; Removing solid particles
    • 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
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/005—Repairing methods or devices
    • 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
    • F05D2220/00—Application
    • F05D2220/30—Application in turbines
    • F05D2220/31—Application in turbines in steam turbines
    • 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
    • F05D2240/14—Casings or housings protecting or supporting assemblies within
    • 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
    • F05D2260/20—Heat transfer, e.g. cooling
    • F05D2260/232—Heat transfer, e.g. cooling characterized by the cooling medium

Definitions

  • the invention relates to a steam turbine plant having a steam turbine, which has a steam inlet region, an exhaust steam region and an axially interposed Beschaufelungs Scheme and with a suction device for extracting cooling fluid from the turbine housing, wherein at least one closable by a closure member and releasable cooling fluid inlet is provided the upstream of the Abdampf Suitees - based on the flow direction of flowing in a normal power operation through the turbine housing action steam - is arranged and can be introduced by the cooling fluid for cooling after a load shutdown to a temperature below the operating temperature in the turbine housing, wherein the steam turbine plant further comprises a valve through which the cooling fluid flows, the valve having a drainage device for draining the valve, wherein the drainage device is a drainage L includes.
  • a steam turbine in particular a high-pressure turbine or a medium-pressure turbine with upstream reheat, occur during a power operation temperatures of about 500 ° C.
  • the turbine housing and the turbine runner and other turbine components such as live steam valve, trip valve, turbine blade, etc., are heated to a high temperature.
  • the turbine rotor of a turbine with a reduced rotational speed can be further rotated by means of a rotating device for a predetermined period of time and the vapor atmosphere can be evacuated via an evacuation device.
  • forced cooling forced cooling
  • a cooling fluid is flowed through the steam turbine via a suction device and an air inlet, thereby achieving a forced cooling.
  • the procedure is as follows:
  • the exhaust steam area is fluidly coupled to a suction device and the cooling steam supply is made possible at the main steam valve via a plug or a small housing opening.
  • the removal of the plug or the creation of a small housing opening is relatively cumbersome and requires a lot of time.
  • a live steam valve must have a correspondingly small opening due to the design.
  • a special tool for releasing the plug or the small housing opening is required.
  • a method for cooling a steam turbine is, for example, from AU2008202733 known. The invention seeks to remedy this situation and to indicate a possibility, such as the supply of a cooling fluid during the forced cooling can be done easier.
  • a steam turbine plant having a steam turbine which has a steam inlet region, an exhaust steam region and an axially interposed blading area, which is further formed with a suction device for extracting cooling fluid from the turbine housing, wherein at least one closable by a closure member and a releasable cooling fluid inlet is provided, which is upstream of the Abdampf Suitees - based on the flow direction of flowing in a normal power operation through the turbine housing action steam - and is introduced by the cooling fluid for cooling after a load shutdown to a temperature below the operating temperature in the turbine housing, wherein the Steam turbine plant further comprises a A valve through which the cooling fluid flows, the valve having drainage means for draining the valve, the drainage means comprising a drainage conduit, the drainage means having a branch fluidly connected to the cooling fluid inlet.
  • the object is achieved by a method for cooling a steam turbine with a turbine housing in which a cooling fluid inlet is fluidly connected to the turbine housing after load shutdown and flowing through the cooling fluid inlet cooling fluid, in particular air, by means of a suction device with heat absorption through the turbine housing in the direction of normal power operation is performed by the steam turbine flowing action steam, wherein the cooling fluid flows through a valve, characterized in that the valve has a dewatering device through which the cooling fluid flows.
  • the invention thus proposes the way to realize the supply of air not via the plug or the small housing opening, but via a lockable additional connection to the drainage pipe.
  • Drainage lines are usually located at a geodetically low point of the valve, with most valves having such a drainage line.
  • it is now proposed to arrange a separate branch on the drainage of the valve and to enable the cooling air supply via this branch.
  • a cooling fluid line is connected via the branch, through which the cooling fluid flows and is sucked through the steam turbine via the suction device and leads to effective cooling.
  • the closure member is arranged in the cooling fluid conduit, wherein advantageously a second closure member is arranged in the cooling fluid conduit.
  • a second branch is arranged between the first closure element and the second closure element of the cooling fluid line, wherein the second branch is fluidically connected to a second drainage line and a second drainage unit or a condensate for draining the cooling fluid is arranged in this second drainage line.
  • the second drainage line is fluidically connected to a condenser.
  • the accumulating water is effectively dissipated in the condensate.
  • FIG. 1 shows a schematic representation of a part of a steam turbine plant 1.
  • Fresh steam flows through a steam generator not shown in a first steam line 2 through a quick-closing valve 3 and a control valve 4.
  • the steam flows through a second steam line 5 in a steam turbine 6.
  • steam flows into a steam inlet region (not illustrated in more detail) and flows out of an exhaust steam region via a third steam line 7 out of the steam turbine 6.
  • the third steam line 7 is fluidically connected to a condenser 8, wherein in the third steam line 7, a further valve 9 is arranged.
  • the condenser 8 is fluidly connected to a suction device 11 via a line 10.
  • a cooling fluid line 12 is arranged on the quick-acting valve 3 or control valve 4.
  • a closure member 13 is disposed in the cooling fluid conduit 12.
  • the closure member 13 is opened and via the cooling fluid line 12 passes a cooling medium such as cooling air through the quick-closing valve 3 and control valve 4 in the second steam line 5 and from there into the Beschaufelungs Scheme the steam turbine 6.
  • This forced flow takes place by the valve 9 is opened and via the suction device 11, a forced flow is achieved.
  • FIG. 2 shows an expanded steam turbine plant 14.
  • Fresh steam is produced here in a steam generator 15 and fed via a first steam line 45 of a high-pressure turbine part 16.
  • a first valve 17 and a second valve 18 are arranged one after the other.
  • the steam generated in the steam generator 15 live steam flows here via the first main steam line 45 and the first valve 17 and second valve 18 in the high-pressure turbine section 16 and from there via a Abdampf Siemens and a first exhaust steam line 19 in the reheater of the steam generator 15th
  • the steam flowing out of the high-pressure turbine section 16 is reheated to a reheater 15b, that is to say the steam generator 15b. H. brought to a higher temperature and passed through a hot superheater 20 and a first medium pressure valve 21 and a second medium pressure valve 22 in a medium-pressure turbine section 23.
  • the first medium-pressure valve 21 is designed as a quick-closing valve.
  • the second medium-pressure valve 22 is designed as a control valve.
  • the steam flowing out of the medium-pressure turbine section 23 flows via a overflow line 24 into a low-pressure turbine section 26.
  • the low-pressure turbine section 26 is supplied with steam via an additional steam via an additional line 27 and an additional valve 28.
  • the effluent from the low-pressure turbine section 26 steam passes into a condenser 29 and condenses there to water.
  • a branch 30 is arranged between the first valve 17 and the second valve 18.
  • the first valve 17 is designed as a quick-closing valve.
  • the second valve 18 is designed as a control valve.
  • a branch line 31 is arranged, which opens into a drainage line 32.
  • the branch line 31 also has a flange 33.
  • a cooling fluid line 34 is coupled.
  • a closure member is arranged, which has a first closure member 35 and a second closure member 36.
  • a second branch 37 is arranged, wherein the second branch 37 is connected to a further branch line 38.
  • this further branch line 38 is a Kondensomat 39 arranged for draining the steam located in the further branch line 38.
  • the hot superheater line 20 is made almost identical with respect to the branch 30. Therefore, a separate description has been omitted and taken over the reference numerals for located in the hot superheater line 20 components for forced cooling.
  • the steam flows via the first main steam line 45 into the high-pressure turbine section 16, wherein via the branch 30 and the drainage line 32, a drainage is performed.
  • the first closure member 35 and the second closure member 36 are closed in this case.
  • a cooling medium supply to the first closure member 35 is made possible, with the first closure member 35 and the second closure member 36 being opened.
  • the cooling medium may be cooling air.
  • the double shut-off can be either fully automated integrated into the turbine control or manually operated. In the second case, the double shut-off must be equipped with limit switches. So it can be ensured that the startup of the steam turbine 6 takes place only when the valves are closed.
  • the suction device 11 in the FIG. 2 not shown. The suction device 11 would be coupled to the first closure member.
  • the medium-pressure turbine section 23 is also supplied with cooling medium.
  • the cooling medium may be cooling air.
  • FIG. 3 shows a cross-sectional view of a valve 40, which may be formed as a second valve 18 or first valve 17, for example.
  • the valve 40 comprises a valve housing 41 and a valve plug, not shown.
  • valve inlet 42 Via a valve inlet 42, steam flows through the valve 40 and passes via the valve outlet 43 to the high-pressure turbine section 16 and low-pressure turbine section 23, respectively.
  • Dewatering 44 is arranged at a geodetic favorable point. This drainage 44 is connected to a drainage line 46. In this drainage line 46, a flange 33 is arranged, to which the cooling fluid line 34 is connected.

Landscapes

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

Claims (11)

  1. Installation (1) de turbine à vapeur, comprenant une turbine (6) à vapeur, qui a une partie d'admission de la vapeur, une partie d'évacuation de la vapeur et une partie d'aubage disposées entre elles axialement et entourée d'une carcasse de turbine, comprenant en outre un dispositif (11) d'aspiration pour aspirer du fluide de refroidissement de la carcasse de la turbine,
    dans laquelle il est prévu au moins une admission de fluide de refroidissement, qui peut être obturée et dégagée par un organe (35, 36) d'obturation, qui est disposé en amont de la partie d'évacuation de la vapeur - rapporté au sens d'écoulement de la vapeur d'action - s'écoulant en fonctionnement normal de puissance dans le carter de la turbine et par lequel du fluide de refroidissement, pour le refroidissement après un arrêt de charge à une température en dessous de la température de fonctionnement, peut être introduit dans le carter de la turbine,
    dans laquelle l'installation (1) de turbine à vapeur comprend en outre une vanne (3, 4, 9, 17, 18, 21, 22, 40) dans laquelle passe le fluide de refroidissement,
    dans laquelle la vanne (3, 4, 9, 17, 18, 21, 22, 40) a un dispositif de déshumidification pour déshumidifier la vanne (3, 4, 9, 17, 18, 21, 22, 40),
    dans laquelle le dispositif de déshumidification comprend un conduit (32, 46) de déshumidification,
    caractérisée en ce que
    le dispositif de déshumidification a une dérivation (30, 37), qui communique en technique d'écoulement avec l'admission de fluide de refroidissement.
  2. Installation (1) de turbine à vapeur suivant la revendication 1,
    dans laquelle la dérivation (30, 37) comprend un conduit (34) pour du fluide de refroidissement dans lequel passe le fluide de refroidissement.
  3. Installation (1) de turbine à vapeur suivant la revendication 2,
    dans laquelle l'organe (35, 36) d'obturation est monté dans le conduit (34) pour du fluide de refroidissement.
  4. Installation (1) de turbine à vapeur suivant la revendication 2 ou 3,
    dans laquelle un deuxième organe (36) d'obturation est monté dans le conduit (34) pour du fluide de refroidissement.
  5. Installation (1) de turbine à vapeur suivant la revendication 4,
    dans laquelle le conduit (34) pour du fluide de refroidissement a une deuxième dérivation (37) entre l'organe (35) d'obturation et le deuxième organe (36) d'obturation.
  6. Installation (1) de turbine à vapeur suivant la revendication 4,
    dans laquelle la deuxième dérivation (37) communique en technique d'écoulement avec un deuxième conduit (46) de déshumidification et, dans ce deuxième conduit (46) de déshumidification, est monté un deuxième dispositif de déshumidification ou un purgeur (39) de condensat pour déshumidifier le conduit (34) pour du fluide de refroidissement.
  7. Installation (1) de turbine à vapeur suivant la revendication 6,
    dans laquelle le deuxième conduit (44) de déshumidification communique en technique d'écoulement avec un condenseur (29).
  8. Procédé de refroidissement d'une turbine (6) à vapeur ayant une carcasse de turbine,
    dans lequel, après un arrêt de charge, on met une admission de fluide de refroidissement, en communication en technique d'écoulement, avec la carcasse de la turbine et on fait passer du fluide de refroidissement, entrant par l'admission de fluide de refroidissement, notamment de l'air, au moyen d'un dispositif (11) d'aspiration, avec absorption de chaleur, dans la carcasse de la turbine, en direction de la vapeur d'action s'écoulant, en fonctionnement de puissance normale, dans la turbine (6) à vapeur,
    dans lequel le fluide de refroidissement passe dans une vanne (3, 4, 9, 17, 18, 21, 22, 40),
    caractérisé en ce que
    la vanne (3, 4, 9, 17, 18, 21, 22, 40) a un dispositif de déshumidification dans lequel passe le fluide de refroidissement.
  9. Procédé suivant la revendication 8,
    dans lequel le fluide de refroidissement passe par un organe (35, 36) d'obturation dans un conduit (32) de déshumidification.
  10. Procédé suivant la revendication 9,
    dans lequel on monte, dans le conduit (32) de déshumidification, un deuxième organe (36) d'obturation et le conduit 32, 44) de déshumidification a une deuxième dérivation (37) entre l'organe (35) d'obturation et le deuxième organe (36) d'obturation,
    dans lequel on monte un deuxième dispositif de déshumidification ou un purgeur (39) de condensat dans un deuxième conduit (44) de déshumidification, qui communique en technique d'écoulement avec la deuxième dérivation (37).
  11. Procédé suivant la revendication 10,
    dans lequel l'organe d'obturation et le deuxième organe (36) d'obturation sont constitués en ayant des interrupteurs de position finale et un démarrage de la turbine (6) à vapeur n'est possible qu'en ayant l'organe (35) d'obturation fermé et le deuxième organe (36) d'obturation fermé.
EP15703512.2A 2014-03-12 2015-01-28 Procédé de refroidissement d'une turbine à vapeur Active EP3087256B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL15703512T PL3087256T3 (pl) 2014-03-12 2015-01-28 Sposób schładzania turbiny parowej
EP15703512.2A EP3087256B1 (fr) 2014-03-12 2015-01-28 Procédé de refroidissement d'une turbine à vapeur

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP14159049.7A EP2918788A1 (fr) 2014-03-12 2014-03-12 Procédé de refroidissement d'une turbine à vapeur
PCT/EP2015/051660 WO2015135681A2 (fr) 2014-03-12 2015-01-28 Procédé de refroidissement d'une turbine à vapeur
EP15703512.2A EP3087256B1 (fr) 2014-03-12 2015-01-28 Procédé de refroidissement d'une turbine à vapeur

Publications (2)

Publication Number Publication Date
EP3087256A2 EP3087256A2 (fr) 2016-11-02
EP3087256B1 true EP3087256B1 (fr) 2017-11-01

Family

ID=50272394

Family Applications (2)

Application Number Title Priority Date Filing Date
EP14159049.7A Withdrawn EP2918788A1 (fr) 2014-03-12 2014-03-12 Procédé de refroidissement d'une turbine à vapeur
EP15703512.2A Active EP3087256B1 (fr) 2014-03-12 2015-01-28 Procédé de refroidissement d'une turbine à vapeur

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP14159049.7A Withdrawn EP2918788A1 (fr) 2014-03-12 2014-03-12 Procédé de refroidissement d'une turbine à vapeur

Country Status (9)

Country Link
US (1) US11346245B2 (fr)
EP (2) EP2918788A1 (fr)
JP (1) JP6282757B2 (fr)
KR (1) KR101834686B1 (fr)
CN (1) CN106103909B (fr)
ES (1) ES2658054T3 (fr)
PL (1) PL3087256T3 (fr)
RU (1) RU2640891C1 (fr)
WO (1) WO2015135681A2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3109420A1 (fr) * 2015-06-25 2016-12-28 Siemens Aktiengesellschaft Procédé de refroidissement d'une turbomachine
CN110374835B (zh) * 2019-07-29 2021-09-03 东南大学 一种双机回热机组的给水泵变速驱动系统及驱动方法
CN111365084B (zh) * 2020-02-24 2022-08-19 东方电气集团东方汽轮机有限公司 一种带快速冷却功能的电站汽轮机保养系统及方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58220907A (ja) * 1982-06-15 1983-12-22 Hitachi Ltd 蒸気タービンの冷却方法及び冷却装置並びに蒸気タービン装置
JPH06193406A (ja) * 1992-12-24 1994-07-12 Toshiba Corp タ−ビンの強制冷却装置
ATE230065T1 (de) 1996-06-21 2003-01-15 Siemens Ag Turbinenwelle sowie verfahren zur kühlung einer turbinenwelle
WO1998013588A1 (fr) * 1996-09-26 1998-04-02 Siemens Aktiengesellschaft Turbine a vapeur, installation de turbine a vapeur et procede de refroidissement de turbine a vapeur
DE19640298A1 (de) * 1996-09-30 1998-04-09 Siemens Ag Dampfturbine, Verfahren zur Kühlung einer Dampfturbine im Ventilationsbetrieb sowie Verfahren zur Kondensationsminderung bei einer Dampfturbine im Leistungsbetrieb
DE19823251C1 (de) * 1998-05-26 1999-07-08 Siemens Ag Verfahren und Vorrichtung zur Kühlung einer Niederdruckstufe einer Dampfturbine
AU2008202733A1 (en) * 2007-06-20 2009-01-22 Stanwell Corporation Limited Method and apparatus for cooling a steam turbine
CN103195508B (zh) * 2013-04-11 2015-08-19 上海电气电站设备有限公司 汽轮机快速冷却系统及冷却方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
KR20160119198A (ko) 2016-10-12
EP3087256A2 (fr) 2016-11-02
CN106103909A (zh) 2016-11-09
US11346245B2 (en) 2022-05-31
WO2015135681A2 (fr) 2015-09-17
EP2918788A1 (fr) 2015-09-16
RU2640891C1 (ru) 2018-01-12
ES2658054T3 (es) 2018-03-08
PL3087256T3 (pl) 2018-04-30
CN106103909B (zh) 2017-10-13
WO2015135681A3 (fr) 2016-03-17
US20170067364A1 (en) 2017-03-09
KR101834686B1 (ko) 2018-03-05
JP6282757B2 (ja) 2018-02-21
JP2017517665A (ja) 2017-06-29

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