EP2952702A1 - Method for heating or maintaining the temperature of a steam turbine - Google Patents

Method for heating or maintaining the temperature of a steam turbine Download PDF

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Publication number
EP2952702A1
EP2952702A1 EP14171101.0A EP14171101A EP2952702A1 EP 2952702 A1 EP2952702 A1 EP 2952702A1 EP 14171101 A EP14171101 A EP 14171101A EP 2952702 A1 EP2952702 A1 EP 2952702A1
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EP
European Patent Office
Prior art keywords
pressure stage
steam
final
stage
steam turbine
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Withdrawn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
EP14171101.0A
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German (de)
French (fr)
Inventor
Tobias Hogen
Yevgen Dr. Kostenko
Sebastian Dr. Zahn
Uwe Zander
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Siemens AG
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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 EP14171101.0A priority Critical patent/EP2952702A1/en
Priority to KR1020167033544A priority patent/KR101965660B1/en
Priority to PCT/EP2015/059276 priority patent/WO2015185292A1/en
Priority to CN201580029589.0A priority patent/CN106414912B/en
Priority to RU2016150530A priority patent/RU2650239C1/en
Priority to JP2016571126A priority patent/JP6339242B2/en
Priority to US15/312,930 priority patent/US10100665B2/en
Priority to EP15719220.4A priority patent/EP3126641A1/en
Publication of EP2952702A1 publication Critical patent/EP2952702A1/en
Withdrawn legal-status Critical Current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
    • 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
    • F01D25/10—Heating, e.g. warming-up before starting
    • 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
    • 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
    • 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
    • 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
    • F05D2220/00—Application
    • F05D2220/70—Application in combination with
    • F05D2220/74—Application in combination with a gas turbine

Definitions

  • the invention relates to a method for heating or keeping warm a steam turbine, the at least one operating at an initial or intermediate pressure level, at least one at a final pressure level, which is lower than the initial or intermediate pressure level, fluidly downstream of the pressure stage final pressure stage and at least one the final pressure stage has downstream condenser, wherein a steam generated outside the steam turbine is introduced into the pressure stage.
  • the invention further relates to a system for heating or keeping warm a steam turbine, the at least one operating at an initial or intermediate pressure level, at least one at a final pressure level, which is lower than the initial or intermediate pressure level, working fluidly downstream of the pressure stage final pressure stage and has at least one of the final pressure stage downstream capacitor.
  • the invention relates to a power plant, in particular gas-and-steam turbine power plant or steam power plant, with at least one steam turbine.
  • the keeping warm of components of a steam turbine can be done by supplying externally generated steam, for example, auxiliary steam, sealing steam or the like, to the components of the steam turbine.
  • Typical temperatures of the steam used herein may be about 250 ° C to about 300 ° C.
  • the steam can be introduced, for example, in a medium-pressure stage of a multi-stage steam turbine, the steam can expand in the direction of a medium-pressure stage downstream low-pressure stage of the steam turbine.
  • the components of a low pressure stage of a steam turbine are not designed for discharge temperatures of 300 ° C. Therefore, upon initiation of a steam used to warm up or maintain a steam turbine into the low pressure stage, significant limitations to the components of the low pressure stage may arise, which can significantly shorten the life of the low pressure stage.
  • the components of a low-pressure stage can be cooled during warming up of a steam turbine, for example by means of a water injection (so-called hood injection) and / or by means of a two-phase injection.
  • hood injection water injection
  • this is associated with additional costs for cooling.
  • the object of the invention is to enable heating or keeping warm a steam turbine at a lower cost.
  • the steam introduced into the steam turbine or its pressure stage is not passed through the final pressure stage.
  • boundary conditions of the components of the final pressure stage which correspond to the design of the low-pressure stage, are maintained when the steam turbine is warmed up or kept warm. Since the components of the final pressure stage are not subjected to the steam or the associated high temperatures, the life of the components of the final pressure stage is not affected.
  • no cooling of the components of the final pressure stage must be carried out, as described above and conventionally required, so that the warming up or keeping warm of the steam turbine using the method according to the invention can be done more cost-effectively, especially since no cooling system must be used.
  • the final pressure stage is fluidically decoupled from the pressure stage during heating or keeping warm of the steam turbine.
  • the pressure stage may be a medium-pressure stage of a three-stage steam turbine, in which the steam is introduced directly into the medium pressure stage of the steam turbine or at which the steam is introduced into a high-pressure stage upstream of the intermediate-pressure stage of the steam turbine and from there into the medium-pressure stage.
  • the final pressure stage can be designed here as a low-pressure stage of the steam turbine.
  • the pressure stage may be a high-pressure stage of a two-stage steam turbine and the final pressure stage may be a low-pressure stage downstream of the high-pressure stage of the steam turbine.
  • a liquid contained in the vapor can be condensed and fed to a liquid circuit in order to be used again for the production of steam can.
  • the condensed liquid may be otherwise used or removed.
  • the method according to the invention can be used for heating or keeping warm a steam turbine of a steam power plant or a combined cycle power plant.
  • the steam is preferably sucked out of the pressure stage by means of negative pressure after flowing through the pressure stage.
  • This is a simple and effective way to dissipate the vapor from the pressure stage.
  • a suction connection can be arranged at the pressure stage, which is connected in fluid-conducting manner to the condenser.
  • a suction connection can be arranged on an overflow line between the pressure stage and the final pressure stage or on a Zudampfön opening into the final pressure stage.
  • the negative pressure can be generated and adjusted by a suitable means, which is for this purpose respectively activated or activated during the warming or warming of the steam turbine.
  • the vapor is sucked out of the pressure stage by means of at least one blower.
  • a suction side of the blower is in this case facing the pressure stage, while a pressure side of the blower faces the condenser.
  • a throttle valve arranged in an overflow line between the pressure stage and the final pressure stage is closed during the introduction of the steam into the pressure stage. This can prevent the steam from entering the final pressure stage.
  • the effectiveness of a suction of the steam from the pressure stage is increased, since the suction of the vapor, a backflow of fluid is prevented from the final pressure stage.
  • the device may be designed to generate auxiliary steam, sealing steam or the like.
  • the device preferably has at least one means for drawing off the vapor from the pressure stage.
  • the means may be, for example, a fan or blower.
  • the system comprises at least one shut-off device formed by a throttle valve arranged in an overflow line between the pressure stage and the final pressure stage, which can be closed during the introduction of the steam into the pressure stage.
  • the system may include an electronic controller for driving the device, the device, and the shut-off device that controls these components of the system as described above.
  • the power plant according to the invention in particular gas-and-steam turbine power plant or steam power plant, comprises at least one steam turbine and at least one system according to one of the aforementioned embodiments or any combination thereof.
  • gas-and-steam turbine power plant or steam power plant comprises at least one steam turbine and at least one system according to one of the aforementioned embodiments or any combination thereof.
  • the figure shows a schematic representation of an embodiment of an inventive system 1 for heating or keeping warm a three-stage steam turbine 2, which operates at an initial pressure level or high pressure level high-pressure stage 3, operating at an intermediate pressure level or medium pressure level pressure stage 4 or medium pressure stage, one Having a final pressure level or low pressure level, fluidically downstream of the pressure stage 4 final pressure stage 5 and a final pressure stage 5 downstream capacitor 6 has.
  • the high-pressure stage 3, the pressure stage 4 and the final pressure stage 5 are mechanically coupled via a common rotor shaft 7.
  • the system 1 comprises a device 8 for generating a steam and for introducing the steam into the pressure stage 4 or medium pressure stage.
  • the device 8 has for this purpose a steam generating unit 9, which generates the steam as the main product or by-product.
  • the device 8 comprises a feed line 10 which opens in the pressure stage 4 and in which an electrically controllable valve 11 is arranged which is opened to heat or keep the steam turbine 2 warm.
  • the system 1 further comprises a device 12 for discharging the steam after flowing through the pressure stage 4 or medium pressure stage from the pressure stage 4 and for directly feeding the derived from the pressure stage 4 steam bypassing the final pressure stage 5 and low pressure stage to the condenser 6.
  • the device 12 comprises a means 13 in the form of a blower for sucking the steam from the pressure stage 4, which is arranged in a suction line 14 of the device 12.
  • the Suction line 14 starts directly at the pressure stage 4.
  • a dash-dotted suction line 15 may be present, which connects an overflow line 16 between the pressure stage 4 and the final pressure stage 5 fluid-conducting with the condenser 6.
  • a shut-off device 17 formed by a throttle valve is arranged, which is closed during the introduction of the steam into the pressure stage 4.

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

Abstract

Die Erfindung betrifft ein Verfahren zum Anwärmen oder Warmhalten einer Dampfturbine (2), die wenigstens eine auf einem Anfangs- oder Zwischendruckniveau arbeitende Druckstufe (4), wenigstens eine auf einem Enddruckniveau, welches niedriger als das Anfangs- oder Zwischendruckniveau ist, arbeitende, fluidtechnisch der Druckstufe (4) nachgeschaltete Enddruckstufe (5) und wenigstens einen der Enddruckstufe (5) nachgeschalteten Kondensator (6) aufweist, wobei ein außerhalb der Dampfturbine (2) erzeugter Dampf in die Druckstufe (4) eingeleitet wird, dadurch gekennzeichnet, dass der Dampf nach Durchströmen der Druckstufe (4) unter Umgehung der Enddruckstufe (5) unmittelbar dem Kondensator (6) zugeführt wird.The invention relates to a method for heating or keeping warm a steam turbine (2), the at least one operating at an initial or intermediate pressure level pressure stage (4), at least one at a final pressure level, which is lower than the initial or intermediate pressure level, fluidly Pressure stage (4) downstream final pressure stage (5) and at least one of the final pressure stage (5) downstream capacitor (6), wherein a steam outside the steam turbine (2) generated in the pressure stage (4) is initiated, characterized in that the steam after Flow through the pressure stage (4), bypassing the final pressure stage (5) directly to the capacitor (6) is supplied.

Description

Die Erfindung betrifft ein Verfahren zum Anwärmen oder Warmhalten einer Dampfturbine, die wenigstens eine auf einem Anfangs- oder Zwischendruckniveau arbeitende Druckstufe, wenigstens eine auf einem Enddruckniveau, welches niedriger als das Anfangs- oder Zwischendruckniveau ist, arbeitende, fluidtechnisch der Druckstufe nachgeschaltete Enddruckstufe und wenigstens einen der Enddruckstufe nachgeschalteten Kondensator aufweist, wobei ein außerhalb der Dampfturbine erzeugter Dampf in die Druckstufe eingeleitet wird.The invention relates to a method for heating or keeping warm a steam turbine, the at least one operating at an initial or intermediate pressure level, at least one at a final pressure level, which is lower than the initial or intermediate pressure level, fluidly downstream of the pressure stage final pressure stage and at least one the final pressure stage has downstream condenser, wherein a steam generated outside the steam turbine is introduced into the pressure stage.

Des Weiteren betrifft die Erfindung ein System zum Anwärmen oder Warmhalten einer Dampfturbine, die wenigstens eine auf einem Anfangs- oder Zwischendruckniveau arbeitende Druckstufe, wenigstens eine auf einem Enddruckniveau, welches niedriger als das Anfangs- oder Zwischendruckniveau ist, arbeitende, fluidtechnisch der Druckstufe nachgeschaltete Enddruckstufe und wenigstens einen der Enddruckstufe nachgeschalteten Kondensator aufweist.The invention further relates to a system for heating or keeping warm a steam turbine, the at least one operating at an initial or intermediate pressure level, at least one at a final pressure level, which is lower than the initial or intermediate pressure level, working fluidly downstream of the pressure stage final pressure stage and has at least one of the final pressure stage downstream capacitor.

Ferner betrifft die Erfindung ein Kraftwerk, insbesondere Gas-und-Dampfturbinen-Kraftwerk oder Dampfkraftwerk, mit wenigstens einer Dampfturbine.Furthermore, the invention relates to a power plant, in particular gas-and-steam turbine power plant or steam power plant, with at least one steam turbine.

Es ist bekannt, wie beispielsweise DE 607 273 A zeigt, dass Komponenten einer zwei- oder mehrstufigen Dampfturbine vor dem Betrieb der Dampfturbine angewärmt oder in einem Zwischenbetrieb der Dampfturbine warmgehalten werden müssen, um Schäden an der Dampfturbine zu vermeiden. Eine Nutzung von dafür vorgesehenen Anwärm- bzw. Warmhaltekonzepten ermöglicht kurze Anfahrzeiten einer eine Dampfturbine umfassenden Kraftwerksanlage, womit enorme Vorteile für Anlagenbauer und Anlagenbetreiber einhergehen.It is known, for example DE 607 273 A shows that components of a two- or multi-stage steam turbine must be warmed up prior to operation of the steam turbine or kept warm in an intermediate operation of the steam turbine in order to avoid damage to the steam turbine. Use of heating or warming concepts provided for this purpose enables short start-up times of a steam turbine comprehensive power plant, which brings enormous benefits for plant manufacturers and plant operators.

Das Warmhalten von Komponenten einer Dampfturbine kann durch Zuführung von extern erzeugtem Dampf, beispielsweise Hilfsdampf, Sperrdampf oder dergleichen, zu den Komponenten der Dampfturbine erfolgen. Typische Temperaturen des hierbei verwendeten Dampfs können etwa 250°C bis etwa 300°C betragen. Der Dampf kann beispielsweise in eine Mitteldruckstufe einer mehrstufigen Dampfturbine eingeführt werden, wobei der Dampf in Richtung einer der Mitteldruckstufe nachgeschalteten Niederdruckstufe der Dampfturbine expandieren kann.The keeping warm of components of a steam turbine can be done by supplying externally generated steam, for example, auxiliary steam, sealing steam or the like, to the components of the steam turbine. Typical temperatures of the steam used herein may be about 250 ° C to about 300 ° C. The steam can be introduced, for example, in a medium-pressure stage of a multi-stage steam turbine, the steam can expand in the direction of a medium-pressure stage downstream low-pressure stage of the steam turbine.

Üblicherweise sind die Komponenten einer Niederdruckstufe einer Dampfturbine nicht für Abströmtemperaturen von 300°C ausgelegt. Daher können bei einer Einleitung eines zum Anwärmen bzw. Warmhalten einer Dampfturbine verwendeten Dampfs in die Niederdruckstufe signifikante Einschränkungen für die Komponenten der Niederdruckstufe entstehen, welche die Lebensdauer der Niederdruckstufe wesentlich verkürzen können. Um dies zu vermeiden, können die Komponenten einer Niederdruckstufe während eines Aufwärmens bzw. Warmhaltens einer Dampfturbine, beispielsweise mittels einer Wassereinspritzung (sogenannte Haubenabspritzung) und/oder mittels einer ZweiPhasen-Eindüsung, gekühlt werden. Dies ist jedoch mit zusätzlichen Kosten für die Kühlung verbunden.Usually, the components of a low pressure stage of a steam turbine are not designed for discharge temperatures of 300 ° C. Therefore, upon initiation of a steam used to warm up or maintain a steam turbine into the low pressure stage, significant limitations to the components of the low pressure stage may arise, which can significantly shorten the life of the low pressure stage. In order to avoid this, the components of a low-pressure stage can be cooled during warming up of a steam turbine, for example by means of a water injection (so-called hood injection) and / or by means of a two-phase injection. However, this is associated with additional costs for cooling.

Aufgabe der Erfindung ist es, ein Anwärmen bzw. Warmhalten einer Dampfturbine unter geringeren Kosten zu ermöglichen.The object of the invention is to enable heating or keeping warm a steam turbine at a lower cost.

Nach dem erfindungsgemäßen Verfahren zum Anwärmen oder Warmhalten einer Dampfturbine, die wenigstens eine auf einem Anfangs- oder Zwischendruckniveau arbeitende Druckstufe, wenigstens eine auf einem Enddruckniveau, welches niedriger als das Anfangs- oder Zwischendruckniveau ist, arbeitende, fluidtechnisch der Druckstufe nachgeschaltete Enddruckstufe und wenigstens einen der Enddruckstufe nachgeschalteten Kondensator aufweist, wird ein außerhalb der Dampfturbine erzeugter Dampf in die Druckstufe eingeleitet und der Dampf nach Durchströmen der Druckstufe unter Umgehung der Enddruckstufe unmittelbar dem Kondensator zugeführt.According to the inventive method for heating or keeping warm a steam turbine, the at least one working at an initial or intermediate pressure level, at least one at a final pressure level, which is lower than the initial or intermediate pressure level, fluidly downstream of the pressure stage final pressure stage and at least one of Comprising final pressure stage downstream condenser, a steam generated outside the steam turbine is introduced into the pressure stage and the steam is fed directly to the condenser after flowing through the pressure stage, bypassing the final pressure stage.

Gemäß der Erfindung wird der in die Dampfturbine bzw. deren Druckstufe eingeleitete Dampf nicht durch die Enddruckstufe geleitet. Hierdurch werden beim Anwärmen bzw. Warmhalten der Dampfturbine Randbedingungen der Komponenten der Enddruckstufe, welche der Auslegung der Niederdruckstufe entsprechen, eingehalten. Da die Komponenten der Enddruckstufe nicht mit dem Dampf bzw. den damit verbundenen hohen Temperaturen beaufschlagt werden, wird die Lebensdauer der Komponenten der Enddruckstufe nicht beeinträchtigt. Zudem muss keine Kühlung der Komponenten der Enddruckstufe erfolgen, wie sie oben beschrieben und herkömmlich erforderlich ist, so dass das Anwärmen bzw. Warmhalten der Dampfturbine unter Verwendung des erfindungsgemäßen Verfahrens kostengünstiger erfolgen kann, insbesondere da kein Kühlsystem eingesetzt werden muss. Durch die erfindungsgemäße Umgehung der Enddruckstufe wird die Enddruckstufe während eines Anwärmens bzw. Warmhaltens der Dampfturbine fluidtechnisch von der Druckstufe entkoppelt.According to the invention, the steam introduced into the steam turbine or its pressure stage is not passed through the final pressure stage. As a result, boundary conditions of the components of the final pressure stage, which correspond to the design of the low-pressure stage, are maintained when the steam turbine is warmed up or kept warm. Since the components of the final pressure stage are not subjected to the steam or the associated high temperatures, the life of the components of the final pressure stage is not affected. In addition, no cooling of the components of the final pressure stage must be carried out, as described above and conventionally required, so that the warming up or keeping warm of the steam turbine using the method according to the invention can be done more cost-effectively, especially since no cooling system must be used. By bypassing the final pressure stage according to the invention, the final pressure stage is fluidically decoupled from the pressure stage during heating or keeping warm of the steam turbine.

Die Druckstufe kann eine Mitteldruckstufe einer dreistufigen Dampfturbine sein, bei welcher der Dampf unmittelbar in die Mitteldruckstufe der Dampfturbine eingeleitet wird oder bei welcher der Dampf in eine der Mitteldruckstufe vorgeschaltete Hochdruckstufe der Dampfturbine eingeleitet und von dort in die Mitteldruckstufe geleitet wird. Die Enddruckstufe kann hierbei als Niederdruckstufe der Dampfturbine ausgebildet sein. Alternativ kann die Druckstufe eine Hochdruckstufe einer zweistufigen Dampfturbine und die Enddruckstufe eine der Hochdruckstufe nachgeschaltete Niederdruckstufe der Dampfturbine sein.The pressure stage may be a medium-pressure stage of a three-stage steam turbine, in which the steam is introduced directly into the medium pressure stage of the steam turbine or at which the steam is introduced into a high-pressure stage upstream of the intermediate-pressure stage of the steam turbine and from there into the medium-pressure stage. The final pressure stage can be designed here as a low-pressure stage of the steam turbine. Alternatively, the pressure stage may be a high-pressure stage of a two-stage steam turbine and the final pressure stage may be a low-pressure stage downstream of the high-pressure stage of the steam turbine.

In dem der Enddruckstufe nachgeschalteten Kondensator kann eine in dem Dampf enthaltene Flüssigkeit kondensiert und einem Flüssigkeitskreislauf zugeführt werden, um erneut zur Erzeugung von Dampf verwendet werden zu können. Alternativ kann die kondensierte Flüssigkeit anderweitig verwendet oder abgeführt werden.In the final pressure stage downstream condenser, a liquid contained in the vapor can be condensed and fed to a liquid circuit in order to be used again for the production of steam can. Alternatively, the condensed liquid may be otherwise used or removed.

Das erfindungsgemäße Verfahren kann zum Anwärmen bzw. Warmhalten einer Dampfturbine eines Dampfkraftwerks oder eines Gas-und-Dampfturbinen-Kraftwerks verwendet werden.The method according to the invention can be used for heating or keeping warm a steam turbine of a steam power plant or a combined cycle power plant.

Der Dampf wird bevorzugt nach Durchströmen der Druckstufe aus der Druckstufe mittels Unterdruck abgesaugt. Dies stellt eine einfache und effektive Möglichkeit zur Ableitung des Dampfs aus der Druckstufe dar. Zum Absaugen des Dampfs aus der Druckstufe kann an der Druckstufe ein Absauganschluss angeordnet werden, welcher fluidleitend mit dem Kondensator verbunden ist. Alternativ kann ein Absauganschluss an einer Überstromleitung zwischen der Druckstufe und der Enddruckstufe oder an einer in die Enddruckstufe mündenden Zudampfleitung angeordnet sein. Der Unterdruck kann durch ein geeignetes Mittel erzeugt und eingestellt werden, welches hierzu während des Anwärmens bzw. Warmhaltens der Dampfturbine entsprechend angesteuert bzw. aktiviert wird.The steam is preferably sucked out of the pressure stage by means of negative pressure after flowing through the pressure stage. This is a simple and effective way to dissipate the vapor from the pressure stage. To suck the steam from the pressure stage, a suction connection can be arranged at the pressure stage, which is connected in fluid-conducting manner to the condenser. Alternatively, a suction connection can be arranged on an overflow line between the pressure stage and the final pressure stage or on a Zudampfleitung opening into the final pressure stage. The negative pressure can be generated and adjusted by a suitable means, which is for this purpose respectively activated or activated during the warming or warming of the steam turbine.

Bevorzugt wird der Dampf mittels wenigstens eines Gebläses aus der Druckstufe abgesaugt. Eine Saugseite des Gebläses ist hierbei der Druckstufe zugewandt, während eine Druckseite des Gebläses dem Kondensator zugewandt ist.Preferably, the vapor is sucked out of the pressure stage by means of at least one blower. A suction side of the blower is in this case facing the pressure stage, while a pressure side of the blower faces the condenser.

Bevorzugt wird eine in einer Überstromleitung zwischen der Druckstufe und der Enddruckstufe angeordnete Drosselklappe während der Einleitung des Dampfs in die Druckstufe geschlossen. Hierdurch kann verhindert werden, dass der Dampf in die Enddruckstufe gelangt. Zudem wird die Effektivität einer Absaugung des Dampfs aus der Druckstufe erhöht, da beim Absaugen des Dampfs eine Rückströmung von Fluid aus der Enddruckstufe unterbunden wird.Preferably, a throttle valve arranged in an overflow line between the pressure stage and the final pressure stage is closed during the introduction of the steam into the pressure stage. This can prevent the steam from entering the final pressure stage. In addition, the effectiveness of a suction of the steam from the pressure stage is increased, since the suction of the vapor, a backflow of fluid is prevented from the final pressure stage.

Das erfindungsgemäße System zum Anwärmen oder Warmhalten einer Dampfturbine, die wenigstens eine auf einem Anfangsoder Zwischendruckniveau arbeitende Druckstufe, wenigstens eine auf einem Enddruckniveau, welches niedriger als das Anfangs- oder Zwischendruckniveau ist, arbeitende, fluidtechnisch der Druckstufe nachgeschaltete Enddruckstufe und wenigstens einen der Enddruckstufe nachgeschalteten Kondensator aufweist, umfasst:

  • wenigstens eine Einrichtung zum Erzeugen eines Dampfs und zum Einleiten des Dampfs in die Druckstufe;
  • wenigstens eine Vorrichtung zum Ableiten des Dampfs nach Durchströmen der Druckstufe aus der Druckstufe und zum unmittelbaren Zuführen des aus der Druckstufe abgeleiteten Dampfs unter Umgehung der Enddruckstufe zu dem Kondensator.
The inventive system for heating or keeping warm a steam turbine, the at least one operating at an initial or intermediate pressure level pressure stage, at least one at a final pressure level, which is lower than the initial or intermediate pressure level, working fluidly downstream of the pressure stage final pressure stage and comprises at least one of the final pressure stage downstream capacitor comprises:
  • at least one means for generating a steam and for introducing the steam into the pressure stage;
  • at least one device for discharging the steam after flowing through the pressure stage from the pressure stage and for directly supplying the vapor derived from the pressure stage, bypassing the final pressure stage to the condenser.

Mit dem System sind die oben mit Bezug auf das Verfahren genannten Vorteile und Ausführungsformen entsprechend verbunden. Die Einrichtung kann zum Erzeugen von Hilfsdampf, Sperrdampf oder dergleichen eingerichtet sein.With the system, the advantages and embodiments mentioned above with respect to the method are connected accordingly. The device may be designed to generate auxiliary steam, sealing steam or the like.

Die Vorrichtung weist bevorzugt wenigstens ein Mittel zum Absaugen des Dampfs aus der Druckstufe auf. Das Mittel kann beispielsweise ein Lüfter bzw. Gebläse sein.The device preferably has at least one means for drawing off the vapor from the pressure stage. The means may be, for example, a fan or blower.

Bevorzugt umfasst das System wenigstens eine durch eine in einer Überstromleitung zwischen der Druckstufe und der Enddruckstufe angeordnete Drosselklappe gebildete Absperreinrichtung, die während der Einleitung des Dampfs in die Druckstufe schließbar ist. Das System kann eine elektronische Steuerung zum Ansteuern der Einrichtung, der Vorrichtung und der Absperreinrichtung aufweisen, welche diese Komponenten des Systems wie oben beschrieben steuert.Preferably, the system comprises at least one shut-off device formed by a throttle valve arranged in an overflow line between the pressure stage and the final pressure stage, which can be closed during the introduction of the steam into the pressure stage. The system may include an electronic controller for driving the device, the device, and the shut-off device that controls these components of the system as described above.

Das erfindungsgemäße Kraftwerk, insbesondere Gas-und-Dampfturbinen-Kraftwerk oder Dampfkraftwerk, umfasst wenigstens eine Dampfturbine und wenigstens ein System gemäß einer der vorgenannten Ausgestaltungen oder einer beliebigen Kombination derselben. Mit dem Kraftwerk sind die oben mit Bezug auf das System bzw. das Verfahren genannten Vorteile entsprechend verbunden.The power plant according to the invention, in particular gas-and-steam turbine power plant or steam power plant, comprises at least one steam turbine and at least one system according to one of the aforementioned embodiments or any combination thereof. With the power plant, the advantages mentioned above with respect to the system and the method are connected accordingly.

Im Folgenden wird eine bevorzugte Ausführungsform des erfindungsgemäßen Systems anhand der beigefügten schematischen Zeichnung erläutert.In the following, a preferred embodiment of the system according to the invention will be explained with reference to the accompanying schematic drawing.

Es zeigt:

  • eine Figur eine schematische Darstellung eines Ausführungsbeispiels für ein erfindungsgemäßes System.
It shows:
  • a figure is a schematic representation of an embodiment of a system according to the invention.

Die Figur zeigt eine schematische Darstellung eines Ausführungsbeispiels für ein erfindungsgemäßes System 1 zum Anwärmen oder Warmhalten einer dreistufigen Dampfturbine 2, die eine auf einem Anfangsdruckniveau bzw. Hochdruckniveau arbeitende Hochdruckstufe 3, eine auf einem Zwischendruckniveau bzw. Mitteldruckniveau arbeitende Druckstufe 4 bzw. Mitteldruckstufe, eine auf einem Enddruckniveau bzw. Niederdruckniveau arbeitende, fluidtechnisch der Druckstufe 4 nachgeschaltete Enddruckstufe 5 und einen der Enddruckstufe 5 nachgeschalteten Kondensator 6 aufweist. Die Hochdruckstufe 3, die Druckstufe 4 und die Enddruckstufe 5 sind über eine gemeinsame Läuferwelle 7 mechanisch gekoppelt.The figure shows a schematic representation of an embodiment of an inventive system 1 for heating or keeping warm a three-stage steam turbine 2, which operates at an initial pressure level or high pressure level high-pressure stage 3, operating at an intermediate pressure level or medium pressure level pressure stage 4 or medium pressure stage, one Having a final pressure level or low pressure level, fluidically downstream of the pressure stage 4 final pressure stage 5 and a final pressure stage 5 downstream capacitor 6 has. The high-pressure stage 3, the pressure stage 4 and the final pressure stage 5 are mechanically coupled via a common rotor shaft 7.

Das System 1 umfasst eine Einrichtung 8 zum Erzeugen eines Dampfs und zum Einleiten des Dampfs in die Druckstufe 4 bzw. Mitteldruckstufe. Die Einrichtung 8 weist hierzu eine Dampferzeugungseinheit 9 auf, welche den Dampf als Hauptprodukt oder Nebenprodukt erzeugt. Des Weiteren umfasst die Einrichtung 8 eine in der Druckstufe 4 mündende Zuleitung 10, in der ein elektrisch ansteuerbares Ventil 11 angeordnet ist, welches zur Anwärmung bzw. Warmhaltung der Dampfturbine 2 geöffnet wird.The system 1 comprises a device 8 for generating a steam and for introducing the steam into the pressure stage 4 or medium pressure stage. The device 8 has for this purpose a steam generating unit 9, which generates the steam as the main product or by-product. Furthermore, the device 8 comprises a feed line 10 which opens in the pressure stage 4 and in which an electrically controllable valve 11 is arranged which is opened to heat or keep the steam turbine 2 warm.

Das System 1 umfasst des Weiteren eine Vorrichtung 12 zum Ableiten des Dampfs nach Durchströmen der Druckstufe 4 bzw. Mitteldruckstufe aus der Druckstufe 4 und zum unmittelbaren Zuführen des aus der Druckstufe 4 abgeleiteten Dampfs unter Umgehung der Enddruckstufe 5 bzw. Niederdruckstufe zu dem Kondensator 6. Zum Ableiten des Dampfs aus der Druckstufe 4 umfasst die Vorrichtung 12 ein Mittel 13 in Form eines Gebläses zum Absaugen des Dampfs aus der Druckstufe 4, welches in einer Absaugleitung 14 der Vorrichtung 12 angeordnet ist. Die Absaugleitung 14 setzt unmittelbar an der Druckstufe 4 an. Alternativ zu der Absaugleitung 14 kann eine strichpunktiert dargestellte Absaugleitung 15 vorhanden sein, welche eine Überströmleitung 16 zwischen der Druckstufe 4 und der Enddruckstufe 5 fluidleitend mit dem Kondensator 6 verbindet. An der Überstromleitung 16 ist eine durch eine Drosselklappe gebildete Absperreinrichtung 17 angeordnet, die während der Einleitung des Dampfs in die Druckstufe 4 geschlossen wird.The system 1 further comprises a device 12 for discharging the steam after flowing through the pressure stage 4 or medium pressure stage from the pressure stage 4 and for directly feeding the derived from the pressure stage 4 steam bypassing the final pressure stage 5 and low pressure stage to the condenser 6. Zum Deriving the steam from the pressure stage 4, the device 12 comprises a means 13 in the form of a blower for sucking the steam from the pressure stage 4, which is arranged in a suction line 14 of the device 12. The Suction line 14 starts directly at the pressure stage 4. As an alternative to the suction line 14, a dash-dotted suction line 15 may be present, which connects an overflow line 16 between the pressure stage 4 and the final pressure stage 5 fluid-conducting with the condenser 6. On the overflow line 16, a shut-off device 17 formed by a throttle valve is arranged, which is closed during the introduction of the steam into the pressure stage 4.

Obwohl die Erfindung im Detail durch das bevorzugte Ausführungsbeispiel näher illustriert und beschrieben wurde, so ist die Erfindung nicht durch das offenbarte Beispiel eingeschränkt und andere Variationen können vom Fachmann hieraus abgeleitet werden, ohne den Schutzumfang der Erfindung zu verlassen.Although the invention has been further illustrated and described in detail by the preferred embodiment, the invention is not limited by the disclosed example, and other variations can be derived therefrom by those skilled in the art without departing from the scope of the invention.

Claims (8)

Verfahren zum Anwärmen oder Warmhalten einer Dampfturbine (2), die wenigstens eine auf einem Anfangs- oder Zwischendruckniveau arbeitende Druckstufe (4), wenigstens eine auf einem Enddruckniveau, welches niedriger als das Anfangs- oder Zwischendruckniveau ist, arbeitende, fluidtechnisch der Druckstufe (4) nachgeschaltete Enddruckstufe (5) und wenigstens einen der Enddruckstufe (5) nachgeschalteten Kondensator (6) aufweist,
wobei ein außerhalb der Dampfturbine (2) erzeugter Dampf in die Druckstufe (4) eingeleitet wird,
dadurch gekennzeichnet, dass
der Dampf nach Durchströmen der Druckstufe (4) unter Umgehung der Enddruckstufe (5) unmittelbar dem Kondensator (6) zugeführt wird.A method of heating or maintaining a steam turbine (2) having at least one pressure stage (4) operating at an initial or intermediate pressure level, at least one fluid pressure stage (4) operating at a final pressure level lower than the initial or intermediate pressure level. downstream final pressure stage (5) and at least one of the final pressure stage (5) downstream capacitor (6),
wherein a steam generated outside the steam turbine (2) is introduced into the pressure stage (4),
characterized in that
the steam after flowing through the pressure stage (4), bypassing the final pressure stage (5) is fed directly to the condenser (6). Verfahren gemäß Anspruch 1,
wobei der Dampf nach Durchströmen der Druckstufe (4) aus der Druckstufe (4) mittels Unterdruck abgesaugt wird.Method according to claim 1,
wherein the steam is exhausted after passing through the pressure stage (4) from the pressure stage (4) by means of negative pressure. Verfahren gemäß Anspruch 2,
wobei der Dampf mittels wenigstens eines Gebläses aus der Druckstufe (4) abgesaugt wird.Method according to claim 2,
wherein the steam is extracted by means of at least one blower from the pressure stage (4). Verfahren gemäß einem der Ansprüche 1 bis 3,
wobei eine in einer Überstromleitung (16) zwischen der Druckstufe (4) und der Enddruckstufe (5) angeordnete Drosselklappe während der Einleitung des Dampfs in die Druckstufe (4) geschlossen wird.Method according to one of claims 1 to 3,
wherein a throttle valve arranged in an overflow line (16) between the pressure stage (4) and the final pressure stage (5) is closed during the introduction of the steam into the pressure stage (4). System (1) zum Anwärmen oder Warmhalten einer Dampfturbine (2), die wenigstens eine auf einem Anfangs- oder Zwischendruckniveau arbeitende Druckstufe (4), wenigstens eine auf einem Enddruckniveau, welches niedriger als das Anfangs- oder Zwischendruckniveau ist, arbeitende, fluidtechnisch der Druckstufe (4) nachgeschaltete Enddruckstufe (5) und wenigstens einen der Enddruckstufe (5) nachgeschalteten Kondensator (6) aufweist, umfassend: - wenigstens eine Einrichtung (8) zum Erzeugen eines Dampfs und zum Einleiten des Dampfs in die Druckstufe (4); - wenigstens eine Vorrichtung (12) zum Ableiten des Dampfs nach Durchströmen der Druckstufe (4) aus der Druckstufe (4) und zum unmittelbaren Zuführen des aus der Druckstufe (4) abgeleiteten Dampfs unter Umgehung der Enddruckstufe (5) zu dem Kondensator (6). A system (1) for heating or maintaining a steam turbine (2) having at least one pressure stage (4) operating at an initial or intermediate pressure level, at least one fluid pressure stage at a final pressure level lower than the initial or intermediate pressure level (4) has downstream final pressure stage (5) and at least one of the final pressure stage (5) downstream capacitor (6), comprising: - At least one means (8) for generating a steam and for introducing the steam into the pressure stage (4); - At least one device (12) for discharging the steam after flowing through the pressure stage (4) from the pressure stage (4) and for directly supplying the from the pressure stage (4) derived steam, bypassing the final pressure stage (5) to the condenser (6) , System (1) gemäß Anspruch 5,
wobei die Vorrichtung (12) wenigstens ein Mittel (13) zum Absaugen des Dampfs aus der Druckstufe (4) aufweist.System (1) according to claim 5,
wherein the device (12) has at least one means (13) for extracting the vapor from the pressure stage (4). System (1) gemäß Anspruch 5 oder 6,
aufweisend wenigstens eine durch eine in einer Überstromleitung (16) zwischen der Druckstufe (4) und der Enddruckstufe (5) angeordnete Drosselklappe gebildete Absperreinrichtung (17), die während der Einleitung des Dampfs in die Druckstufe (4) schließbar ist.System (1) according to claim 5 or 6,
comprising at least one shut-off device (17) formed by a throttle valve arranged in an overflow line (16) between the pressure stage (4) and the final pressure stage (5) and closable during the introduction of the steam into the pressure stage (4). Kraftwerk,
insbesondere Gas-und-Dampfturbinen-Kraftwerk oder Dampfkraftwerk,
mit wenigstens einer Dampfturbine (2), aufweisend wenigstens ein System (1) gemäß einem der Ansprüche 5 bis 7.Power plant,
in particular gas-and-steam-turbine power plant or steam power plant,
with at least one steam turbine (2), comprising at least one system (1) according to one of claims 5 to 7.
EP14171101.0A 2014-06-04 2014-06-04 Method for heating or maintaining the temperature of a steam turbine Withdrawn EP2952702A1 (en)

Priority Applications (8)

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EP14171101.0A EP2952702A1 (en) 2014-06-04 2014-06-04 Method for heating or maintaining the temperature of a steam turbine
KR1020167033544A KR101965660B1 (en) 2014-06-04 2015-04-29 Method for heating up a steam turbine or for keeping a steam turbine hot
PCT/EP2015/059276 WO2015185292A1 (en) 2014-06-04 2015-04-29 Method for heating up a steam turbine or for keeping a steam turbine hot
CN201580029589.0A CN106414912B (en) 2014-06-04 2015-04-29 Method for the warming-up or insulation of steam turbine
RU2016150530A RU2650239C1 (en) 2014-06-04 2015-04-29 Method of heating or keeping steam turbine in hot state
JP2016571126A JP6339242B2 (en) 2014-06-04 2015-04-29 Method for warming up or keeping warm of steam turbine
US15/312,930 US10100665B2 (en) 2014-06-04 2015-04-29 Method for heating up a steam turbine or for keeping a steam turbine hot
EP15719220.4A EP3126641A1 (en) 2014-06-04 2015-04-29 Method for heating up a steam turbine or for keeping a steam turbine hot

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KR101965660B1 (en) 2019-04-04
JP2017522483A (en) 2017-08-10
JP6339242B2 (en) 2018-06-06
US20170204741A1 (en) 2017-07-20
RU2650239C1 (en) 2018-04-11
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EP3126641A1 (en) 2017-02-08
US10100665B2 (en) 2018-10-16

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