EP2995785A1 - Procédé destiné au fonctionnement d'une centrale électrique - Google Patents

Procédé destiné au fonctionnement d'une centrale électrique Download PDF

Info

Publication number
EP2995785A1
EP2995785A1 EP14184604.8A EP14184604A EP2995785A1 EP 2995785 A1 EP2995785 A1 EP 2995785A1 EP 14184604 A EP14184604 A EP 14184604A EP 2995785 A1 EP2995785 A1 EP 2995785A1
Authority
EP
European Patent Office
Prior art keywords
condenser
steam
plant
valve
vacuum breaker
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Withdrawn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
EP14184604.8A
Other languages
German (de)
English (en)
Inventor
Christian Musch
Heinrich STÜER
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 EP14184604.8A priority Critical patent/EP2995785A1/fr
Priority to PCT/EP2015/069622 priority patent/WO2016037861A1/fr
Publication of EP2995785A1 publication Critical patent/EP2995785A1/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • F01K9/006—Vacuum-breakers

Definitions

  • the invention relates to a system comprising a condenser with an inlet opening and an outlet opening, with a vacuum breaker line, in which there is a fluidic connection between a condenser interior and a gas outside space located outside the condenser.
  • a plant in particular a power plant, comprises a steam generator and a steam turbine, through which a live steam generated in the steam generator flows and drives a shaft.
  • the thermal energy of the steam is converted into rotational energy of the rotor.
  • an electric generator is coupled to transmit torque, which is designed to convert the rotational energy into electrical energy.
  • the electrical energy generated in such a system is then transmitted via a suitable transmission network to various electrical consumers.
  • the plant-mounted steam turbine generally comprises a turbine rotor blade and a turbine housing disposed about the rotor and including a plurality of turbine nozzles. Between the rotor and the inner housing, a flow channel is formed by the turbine guide and turbine blades, through which the thermal energy is optimized efficiency converted into rotational energy of the rotor. In continuous operation, the rotor rotates at a stable frequency of, for example, 50 Hz. Situations are conceivable in which the steam turbine has to be switched off, which is also referred to as shutdown of the steam turbine. This is usually done by simply switching off the steam supply. This means that by a valve which is arranged in a main steam line, the steam supply is turned off in the inflow region of the steam turbine.
  • the rotor reduces its rotational speed.
  • the generator before the speed can be reduced, the generator must be decoupled from the grid. The generator then idles with the steam turbine.
  • the existing kinetic rotational energy of the shaft is dissipated as a result of bearing friction and ventilation losses, which results in reducing the rotational speed of the shaft.
  • Such a shutdown of a steam turbine can take up to an hour. However, it is disadvantageous that possible blade resonances can arise by slowly reducing the rotational speed. It is therefore desirable that the shutdown of the steam turbine takes place comparatively quickly.
  • a hitherto known method for effectively reducing the speed is to break the condenser vacuum. This increases the ventilation losses, which leads to a reduction in the speed.
  • breaking the condenser vacuum creates the possibility of air and thus oxygen entering the condenser and possibly causing stress corrosion cracking.
  • the conductivity of the condensate is increased by a vacuum break.
  • the invention has set itself the task of specifying a system with which a fast shutdown is possible.
  • a system comprising a condenser with an inlet opening and an outlet opening, with a vacuum breaker line which forms a fluidic connection between a condenser interior and a gas outside space located outside the condenser wherein the gas exterior is a container filled with an inert gas.
  • a suitable container such as a gas bottle
  • an inert gas in contrast to the conventional vacuum breaking.
  • the inert gas is fed into the condenser interior via suitable means, thereby rapidly increasing the condenser pressure without affecting the conductivity of the steam.
  • a threshold value is not reached, which could lead to stress corrosion cracking.
  • the invention proposes to increase the pressure in the capacitor interior by flowing with inert gas.
  • the inert gas is nitrogen.
  • Inert gases are gases that are very inert, so participate in only a few chemical reactions.
  • the inert gases include, for example, nitrogen and all noble gases such as helium, neon, argon, krypton, xenon and radon.
  • the invention is designed for the application of the aforementioned noble gases.
  • the advantage of using nitrogen as the inert gas is that much of the nitrogen is part of the air and relatively easy to use.
  • a valve is arranged in the vacuum circuit, which is designed to close and to open the vacuum circuit.
  • the vacuum in the capacitor interior can be broken by the valve is opened.
  • the Closing and opening of the valve takes place automatically via a control or an automation system.
  • the valve can also be operated manually in an emergency. In any case, an opening of the valve will take place only when an interference signal occurs.
  • the system comprises a vacuum breaker branch line, which produces a fluidic connection between the vacuum breaker line and an outer space filled with air.
  • a second valve is arranged in the vacuum breaker branch line.
  • the vacuum in the capacitor can be broken. This is done either by opening the valve to direct nitrogen from the container into the condenser interior, or by opening the second valve with the valve closed to direct air into the condenser interior.
  • a mixture is also conceivable in such a way that the valve and the second valve are partially or completely opened in order to guide a mixture of air and nitrogen into the condenser interior.
  • FIG. 1 shows a schematic view of a plant according to the invention.
  • FIG. 1 shows a plant 1.
  • This plant 1 can be a gas and steam turbine plant, a so-called CCGT plant.
  • the plant can also be a pure steam power plant, in which no gas turbine is involved in energy production.
  • the plant 1 comprises a steam generator 2, which is designed to generate a steam, which then passes via a line 3 in a steam turbine 4.
  • the generation of the steam can be done by fossil fuels. Other types of steam generation are possible.
  • the steam turbine 4 is shown only schematically in FIG. As a rule, the steam turbine 4 comprises a plurality of partial turbines, which have been omitted in the figure for reasons of clarity.
  • the steam turbine 4 comprises a rotor on which turbine blades are arranged. Turbine vanes are arranged around the rotor, which are fixedly arranged on an inner housing. As a rule, an outer housing is arranged around the inner housing.
  • the steam flows via the steam inlet 5 into a flow channel and flows after the flow through the flow channel via a steam outlet 6 from the steam turbine 4 in another line 7.
  • the rotational energy of the rotor is used to drive an electric generator, which is used to generate electrical energy is formed. This is not shown in FIG. 1 for reasons of clarity.
  • the steam flowing out of the steam turbine 4 has a low temperature and low pressure. Via an inlet opening 8, the steam passes into a condenser 9. In the condenser 9, the pressure is very low, and is in the millibar range. The pressure is thus comparable to the pressure in a vacuum. In the condenser 9, the steam is converted into water. The water passes through an outlet opening 10 to a return line 11 finally to a pump 12 and is passed from the pump 12 to the steam generator 2, where the water is converted back into steam. Thus, a water-steam cycle is closed.
  • the condenser 9 comprises a vacuum breaker line 13.
  • This vacuum breaker line 13 provides a fluidic connection between a condenser interior 14 and a gas exterior 15 located outside the condenser 9.
  • This gas exterior 15 is a container 16 filled with inert gas.
  • the inert gas used is nitrogen. which is located in the container 16.
  • a valve 17 is arranged, which is designed to close and open the vacuum circuit 13. By opening the valve 17, the inert gas in the container 16 passes into the condenser interior 14 via the vacuum circuit 13.
  • the system 1 furthermore comprises a vacuum breaker branch line 18, which produces a fluidic connection between the vacuum breaker line 13 and an outer space 19 filled with air.
  • a second valve 20 is arranged, which is designed to open and close the flow in the vacuum breaker branch line 18.
  • valve 17 and the second valve 20 are connected to a not-shown automation system.
  • the opening and closing of the valves 17 and 20 takes place automatically via a control system or can be performed by hand.
  • the inert gas from the container 16 is used to fill the condenser interior 14 to increase the vacuum or pressure there. This pressure increase causes ventilation losses in the flow channel of the steam turbine 4 arise. As a result, the departure time of the steam turbine 4 is effectively reduced.
  • valves 17 and 20 By simultaneously opening (partially opening possible) of the valves 17 and 20, a mixture of air and nitrogen can get into the condenser interior 14.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Control Of Turbines (AREA)
EP14184604.8A 2014-09-12 2014-09-12 Procédé destiné au fonctionnement d'une centrale électrique Withdrawn EP2995785A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP14184604.8A EP2995785A1 (fr) 2014-09-12 2014-09-12 Procédé destiné au fonctionnement d'une centrale électrique
PCT/EP2015/069622 WO2016037861A1 (fr) 2014-09-12 2015-08-27 Procédé pour faire fonctionner une centrale électrique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14184604.8A EP2995785A1 (fr) 2014-09-12 2014-09-12 Procédé destiné au fonctionnement d'une centrale électrique

Publications (1)

Publication Number Publication Date
EP2995785A1 true EP2995785A1 (fr) 2016-03-16

Family

ID=51539175

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14184604.8A Withdrawn EP2995785A1 (fr) 2014-09-12 2014-09-12 Procédé destiné au fonctionnement d'une centrale électrique

Country Status (2)

Country Link
EP (1) EP2995785A1 (fr)
WO (1) WO2016037861A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018189176A1 (fr) * 2017-04-11 2018-10-18 Siemens Aktiengesellschaft Procédé de conservation

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7101148B2 (ja) * 2019-08-09 2022-07-14 日立Ｇｅニュークリア・エナジー株式会社 復水器真空破壊装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3750395A (en) * 1971-10-22 1973-08-07 Westinghouse Electric Corp Overspeed protection system for a turbo-generator unit
US20100199672A1 (en) * 2009-02-06 2010-08-12 Siemens Energy, Inc. Condenser System

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3750395A (en) * 1971-10-22 1973-08-07 Westinghouse Electric Corp Overspeed protection system for a turbo-generator unit
US20100199672A1 (en) * 2009-02-06 2010-08-12 Siemens Energy, Inc. Condenser System

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018189176A1 (fr) * 2017-04-11 2018-10-18 Siemens Aktiengesellschaft Procédé de conservation
JP2020516808A (ja) * 2017-04-11 2020-06-11 シーメンス アクティエンゲゼルシャフト 保全方法
US10895172B2 (en) 2017-04-11 2021-01-19 Siemens Aktiengesellschaft Preservation method

Also Published As

Publication number Publication date
WO2016037861A1 (fr) 2016-03-17

Similar Documents

Publication Publication Date Title
EP2865045B1 (fr) Système de centrale comportant une unité d'accumulation haute température
EP2458180A1 (fr) Procédé de fonctionnement d'une turbine à gaz lors de la régulation de la charge, dispositif de réglage du fonctionnement d'une turbine à gaz et centrale
DE3107695A1 (de) Stromerzeugungsanlage
DE102011052235A1 (de) Druckbetätigter Stopfen
EP2596213B1 (fr) Turbine à vapeur avec un refroidissement interne
DE102008057776A1 (de) Verfahren zum Betreiben einer Windkraftanlage und Windkraftanlage
EP2808501A1 (fr) Procédé destiné au fonctionnement d'une centrale électrique à cycle combiné
EP1937942B1 (fr) Centrale à vapeur et procédé pour réaménager une centrale à vapeur
EP2995785A1 (fr) Procédé destiné au fonctionnement d'une centrale électrique
EP2644840A1 (fr) Système de turbines à vapeur et procédé de démarrage d'une turbine à vapeur
EP2464832A1 (fr) Centrale électrique et procédé pour exploiter une centrale électrique
DE102010009130A1 (de) Dampfkraftwerk umfassend eine Tuning-Turbine
EP2984301B1 (fr) Procédé de test d'une protection contre le surrégime d'une installation gud à un arbre
DE602005003913T2 (de) Kombikraftwerk mit Dampfturbinen- und Gasturbinengruppen
EP3511535A1 (fr) Installation et procédé de fonctionnement d'une installation
EP2982835A1 (fr) Centrale thermique dotee d'une turbine a vapeur
DE2550059C2 (de) Sicherheitssystem für eine Dampfturbinenanlage
EP3039286A1 (fr) Éolienne équipée d'un module d'auto-alimentation
DE19921023A1 (de) Kernkraftanlage mit einer Dampfturbinenanordnung sowie Verfahren zum Betrieb einer Kernkraftanlage mit Dampfturbinenanordnung
EP2628517A1 (fr) Dispositif de dégazage d'un liquide d'étanchement
DE19905818C2 (de) Gasturbinenkraftwerk
EP3128136A1 (fr) Introduction de surcharge dans une turbine a vapeur
EP4136329B1 (fr) Centrale électrique à turbine à gaz et à turbine à vapeur et procédé pour en compléter l'équipement
EP3109420A1 (fr) Procédé de refroidissement d'une turbomachine
DE202009009428U1 (de) Kombinierte Wind- und Solarkraftanlage

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20160917