EP2918796A1 - Centrale à vapeur dotée d'un générateur de vapeur comprenant une armature de maintien de pression à tambour - Google Patents

Centrale à vapeur dotée d'un générateur de vapeur comprenant une armature de maintien de pression à tambour Download PDF

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Publication number
EP2918796A1
EP2918796A1 EP14159495.2A EP14159495A EP2918796A1 EP 2918796 A1 EP2918796 A1 EP 2918796A1 EP 14159495 A EP14159495 A EP 14159495A EP 2918796 A1 EP2918796 A1 EP 2918796A1
Authority
EP
European Patent Office
Prior art keywords
steam
drum
pressure
power plant
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Withdrawn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
EP14159495.2A
Other languages
German (de)
English (en)
Inventor
Jürgen HAVEMANN
Matthias Heue
Özgür Korkmaz
Heinz Lötters
Norbert Pieper
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 EP14159495.2A priority Critical patent/EP2918796A1/fr
Priority to PCT/EP2015/054234 priority patent/WO2015135772A1/fr
Publication of EP2918796A1 publication Critical patent/EP2918796A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/42—Applications, arrangements, or dispositions of alarm or automatic safety devices
    • F22B37/44—Applications, arrangements, or dispositions of alarm or automatic safety devices of safety valves
    • 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

Definitions

  • the invention relates to a steam power plant comprising a steam turbine and a steam generator with a drum and a steam line from the drum to the steam turbine, wherein the steam line has a drum pressure holding armature.
  • Steam power plants essentially comprise a steam turbine consisting of several partial turbines. Usually, such steam turbines are divided into a high-pressure turbine section, medium-pressure turbine section and low-pressure turbine section and optionally manufactured as separate components. In addition, designs are known in which the high-pressure part and the medium-pressure part are arranged in a common housing. There are also designs known in which the medium-pressure part and the low-pressure part are arranged in a common housing.
  • a steam power plant usually comprises a steam generator, which is essentially characterized by numerous lines and a drum.
  • the drum is essentially designed to separate steam and water.
  • From the steam generator lines are arranged to inlet openings of the steam turbine, wherein in the steam lines usually a Schnell gleich- and a control valve are arranged. This applies in particular to the lines to the high-pressure turbine sections and medium-pressure turbine sections.
  • the steam from the medium-pressure turbine section will finally be released via the low-pressure turbine section.
  • additional steam from the steam generator is fed into the low-pressure turbine section (3-pressure process).
  • This additional steam line comprises a quick-closing member and an actuator, which in some embodiments is designed as a flap.
  • the quick-acting members are opened and the actuators regulate the inflow of steam to the respective turbine part.
  • the steam supply must be interrupted suddenly, which means that the high-pressure quick-closing valve and the medium-pressure quick-closing valve abruptly closes as the quick-closing member located in the additional steam line.
  • the fittings in the area of the steam generator are not used to protect the steam turbine. So also not the drum pressure holding valve on the low-pressure Zudampftrommel.
  • This drum pressure holding valve is used inter alia to increase the exhaust gas temperature of the heat recovery steam generator during low load operation and combustion of fuel with increased sulfur content. Thus, the formation of sulfuric acid is prevented by dew point below in the boiler outlet area.
  • the invention has set itself the task of offering a total cost-optimized steam power plant.
  • a steam power plant comprising a steam turbine and a steam generator with a drum and a steam line from the drum to the steam turbine, wherein the steam line has a drum pressure holding, wherein the drum pressure holding valve is designed such that it is closed in case of failure.
  • the drum pressure holding device is thus additionally transferred a procedural task to close sufficiently quickly and safely at overspeed of the steam turbine. It uses a solution that meets the functional safety requirements for the entire safety lifecycle, such as redundancy, probability of failure, and periodic testing. As a result of this additional assumption of function of the drum pressure holding fitting, it is possible to dispense with the quick-closing flap of the steam turbine in the low-pressure Zudampf ein and, moreover, the drainage between the quick-closing flap and the control valve flap. The manufacturing, assembly, commissioning and maintenance costs for the steam turbine thereby decreases and leads to a cost savings. The double shut-off is also achieved by the Zudampf valve together with the drum pressure holding valve.
  • the drum pressure holding armature is coupled to a drum control system, wherein in the event of an error the control system receives a signal to the drum pressure holding armature and the drum pressure holding armature closes.
  • the drum control system is coupled to a steam turbine protection system.
  • a steam turbine protection system in the case of an overspeed whose signal comes from the steam turbine protection system, can be on the drum control system transfer and achieve a fast closing of the steam supply.
  • the drum control system is designed such that in the event of detection of an overspeed of the steam turbine, a signal for closing the drum pressure holding valve takes place.
  • the drum is designed as a low-pressure drum.
  • the steam power plant is designed for a CCG-3-pressure-process or CCG-2-pressure-process.
  • the steam line is fluidically coupled to a low-pressure turbine part.
  • the steam generator has a low-pressure drum and a high-pressure drum.
  • FIG. 1 shows a steam power plant 1 according to the prior art.
  • a steam power plant 1 is characterized a steam generator 2 and a steam turbine 3 from.
  • the steam turbine 3 comprises a combined high-pressure turbine section 3a and a medium-pressure turbine section 3b, which are arranged in a common housing and a low-pressure turbine section 3c.
  • the steam generator 2 has a heater unit 4a, which generates live steam via a live steam line 5 to the high-pressure turbine section 3a.
  • the live steam flows through a high-pressure quick-action valve 6 and a high-pressure control valve 7 and from there into the high-pressure turbine part 3a.
  • the steam flows from the cold part of the reheater 8 to a medium-pressure heater 4b.
  • the medium-pressure heater 4b the steam is brought back to a higher temperature and fed from there via a medium-pressure line 9 and a medium-pressure quick-acting valve 10 and a medium-pressure control valve 11 to the medium-pressure turbine section 3b.
  • the steam passes via an overflow line 12 to an inlet of the low-pressure turbine section 3c.
  • the vapor relaxes further and passes via discharge lines 13 to a condenser 14 and from there via a pump 15 and a return line 16 to the steam generator 2 back.
  • the condenser 14 the steam condenses to water and is fed via the return line 16 and the pump 15 to the steam generator 2 and converted there again to steam.
  • the steam power plant 1 comprises a low-pressure inflow line 17 in which a low-pressure quick-closing flap 18 and a low-pressure flap 19 are arranged.
  • a low-pressure heater unit 4c is formed, which opens into a drum, not shown, and is connected from there via a drum pressure holding valve 20 with the low pressure turbine part 3c.
  • the drum pressure holding valve 20 is intended to maintain the pressure in the low-pressure inflow line 17 at a constant pressure.
  • the high-pressure quick-closing valves 6, medium-pressure quick-closing valves 10 and the low-pressure control valves 19 are opened.
  • close the aforementioned organs abruptly and block the inflow of steam to the steam turbine.
  • the drum pressure holding valve 20 therefore assumes no task to hedge the steam turbine.
  • FIG. 2 a steam power plant 1 is shown with a change according to the invention.
  • the difference to the steam power plant 1 according to FIG. 1 is that the drum pressure holding valve 20 is now used to hedge the steam turbine and takes over a quick-closing task in addition to the control task.
  • the required procedural redundancy on the low-pressure Zudampfnote which were previously realized by the components 18 and 19, achieved by the inclusion of the drum pressure holding valve 20 to the low-pressure Zudampftrommel the heat recovery steam generator in the hedging concept of the steam turbine 3.
  • the drum pressure holding valve 20 "fail safe" must be executed closing and be controlled by the steam turbine protection system.
  • the drum pressure holding valve 20 provides redundancy to the low pressure steam exhaust valve.
  • the drum pressure holding valve 20 is formed with a drum control system 21, which in turn is signal coupled to a steam turbine protection system (not shown).
  • the low-pressure flip-flop 18 can disappear completely, which is in the FIG. 2 is shown.
  • the drum control system detects an overspeed, a signal is forwarded to the drum pressure holding armature for closing.
  • the steam power plant is for a GuD-3-pressure-process or GuD-2-pressure process formed.
  • the steam generator 2 has a high-pressure drum, not shown.
  • the drum pressure holding valve 20 is placed close enough to the steam turbine 3. This ensures that not too much steam in the steam turbine 3 is emptied in faulty staying open the Zudampfklappe from the steam accumulator between the pressure holding valve and Zudampfklappe and the speed increases unacceptably.
  • the drum pressure holding valve 20 is thus still placed close enough to the waste heat steam generator. As a result, the entire Zudampftechnisch need not be designed for a higher pressure level.
  • the elimination of the low-pressure quick-release flap 18 total costs are saved and reduces the manufacturing, assembly, commissioning and maintenance of the steam turbine.
  • the drum pressure holding valve 20 is controlled both by the pressure control of the AHDE and via separate inputs multi-channel in quiescent current from the steam turbine protection system. The protection control has priority over the control function.
  • This solution according to the invention can be used for all steam turbines in which steam is passed through a shut-off valve to the steam turbine.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Control Of Turbines (AREA)
EP14159495.2A 2014-03-13 2014-03-13 Centrale à vapeur dotée d'un générateur de vapeur comprenant une armature de maintien de pression à tambour Withdrawn EP2918796A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP14159495.2A EP2918796A1 (fr) 2014-03-13 2014-03-13 Centrale à vapeur dotée d'un générateur de vapeur comprenant une armature de maintien de pression à tambour
PCT/EP2015/054234 WO2015135772A1 (fr) 2014-03-13 2015-03-02 Centrale électrique à vapeur équipée d'un générateur de vapeur comportant une vanne de maintien de pression de tambour

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14159495.2A EP2918796A1 (fr) 2014-03-13 2014-03-13 Centrale à vapeur dotée d'un générateur de vapeur comprenant une armature de maintien de pression à tambour

Publications (1)

Publication Number Publication Date
EP2918796A1 true EP2918796A1 (fr) 2015-09-16

Family

ID=50289422

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14159495.2A Withdrawn EP2918796A1 (fr) 2014-03-13 2014-03-13 Centrale à vapeur dotée d'un générateur de vapeur comprenant une armature de maintien de pression à tambour

Country Status (2)

Country Link
EP (1) EP2918796A1 (fr)
WO (1) WO2015135772A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113513377B (zh) * 2021-05-28 2022-10-11 杭州大路实业有限公司 一种用于超低温低压酯化蒸汽余热回收的蒸汽透平

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3616787A (en) * 1970-01-02 1971-11-02 Sulzer Ag Overflow valve for a steam plant
EP1953350A2 (fr) * 2007-01-04 2008-08-06 Siemens Aktiengesellschaft Aube de turbine
US20100162721A1 (en) * 2008-12-31 2010-07-01 General Electric Company Apparatus for starting a steam turbine against rated pressure
EP2385285A1 (fr) * 2010-05-03 2011-11-09 Siemens Aktiengesellschaft Procédé de surveillance d'une armature multiple à fermeture rapide et dispositif correspondant
EP2592241A1 (fr) * 2011-11-14 2013-05-15 Siemens Aktiengesellschaft Procédé de fonctionnement d'une installation de turbine à gaz et à vapeur pour la stabilisation de fréquence

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3616787A (en) * 1970-01-02 1971-11-02 Sulzer Ag Overflow valve for a steam plant
EP1953350A2 (fr) * 2007-01-04 2008-08-06 Siemens Aktiengesellschaft Aube de turbine
US20100162721A1 (en) * 2008-12-31 2010-07-01 General Electric Company Apparatus for starting a steam turbine against rated pressure
EP2385285A1 (fr) * 2010-05-03 2011-11-09 Siemens Aktiengesellschaft Procédé de surveillance d'une armature multiple à fermeture rapide et dispositif correspondant
EP2592241A1 (fr) * 2011-11-14 2013-05-15 Siemens Aktiengesellschaft Procédé de fonctionnement d'une installation de turbine à gaz et à vapeur pour la stabilisation de fréquence

Also Published As

Publication number Publication date
WO2015135772A1 (fr) 2015-09-17

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