EP3249183A1 - Vorrichtung und verfahren zum aufwärmen eines stellventils - Google Patents

Vorrichtung und verfahren zum aufwärmen eines stellventils Download PDF

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Publication number
EP3249183A1
EP3249183A1 EP16170764.1A EP16170764A EP3249183A1 EP 3249183 A1 EP3249183 A1 EP 3249183A1 EP 16170764 A EP16170764 A EP 16170764A EP 3249183 A1 EP3249183 A1 EP 3249183A1
Authority
EP
European Patent Office
Prior art keywords
quick
control valve
valve
steam
closing
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Withdrawn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
EP16170764.1A
Other languages
German (de)
English (en)
French (fr)
Inventor
Martin Bennauer
Oliver Stawarski
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 EP16170764.1A priority Critical patent/EP3249183A1/de
Priority to CN201780032279.3A priority patent/CN109196189B/zh
Priority to PCT/EP2017/059476 priority patent/WO2017202549A1/de
Publication of EP3249183A1 publication Critical patent/EP3249183A1/de
Withdrawn legal-status Critical Current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
    • 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
    • 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

Definitions

  • the invention relates to an arrangement comprising a steam line and arranged in the steam line control valve with a control valve opening, wherein the control valve is designed such that the control valve allows any intermediate position of the control valve opening, further comprising a arranged in the steam line quick-closing valve with a quick-closing valve opening, said Control valve and the quick-closing valve are connected in series.
  • the invention further relates to a method for warming up a control valve, wherein the control valve is arranged in a steam line and the control valve is designed such that the control valve allows any intermediate position of the control valve opening, wherein in the steam line a quick-acting valve is arranged, wherein the quick-closing valve is formed that the quick-closing valve allows any intermediate position of the quick-release valve opening.
  • control valves must be preheated during a start. This applies especially to the case of a so-called cold start, in which the outlet temperatures are relatively low before a start of the steam power plant.
  • the control valves are preheated in such a way that the quick-acting valve is opened under steam, the quick-acting valve and the control valve being connected in series. The heating of the control valve via the condensation on the surface.
  • the component voltages of the live steam control valve are not too large, they must be limited by the condensation temperature is limited.
  • the live steam quick-closing valve which is opened to preheat the live steam control valve, only has either a complete-up or complete-to-function, the heating behavior of the control valve is coupled to the live steam pressure.
  • the invention has set itself the task of simplifying the startup process of a power plant.
  • an arrangement comprising a steam line and arranged in the steam line control valve with a control valve opening, wherein the control valve is designed such that the control valve allows any intermediate position of the control valve opening, further comprising a arranged in the steam line quick-closing valve with a quick-closing valve opening, wherein the control valve and the quick-acting valve are connected in series, wherein the quick-acting valve is designed such that the quick-closing valve allows any intermediate position of the quick-closing valve opening.
  • the object is further achieved by a method for warming up a control valve, wherein the control valve is arranged in a steam line and the control valve is designed such that the control valve allows any intermediate position of the control valve opening, wherein in the steam line a quick-acting valve is arranged, wherein the quick-closing valve is formed such that the Quick release valve allows any intermediate position of the quick-release valve opening, the quick-acting valve is used to preheat the high-speed valve.
  • the quick-closing valve is designed such that it allows any intermediate position of the quick-closing valve opening.
  • the quick-closing valve is equipped, so to speak, as a servo valve for positioning.
  • the quick-closing valve is moved from the closed position slowly and as a function of the thermal stresses in the live steam control valve to a small position in order to limit the pressure in the valve housing of the control valve.
  • the drain valve of the valve housing must be open, which is anyway the case with cold and cold-warm valves.
  • a servo valve quick-closing valve is used specifically for preheating the live steam control valve. By monitoring the component allowances of the live steam control valve no additional measuring points are needed.
  • Another advantage of the invention is that the pressure build-up in the main steam line can be independent of the outlet temperature of the turbine valve. This increases the flexibility of a steam power plant and reduces the need for coordination during project execution and signal exchange.
  • Another advantage of the invention is that the block startup time is shortened in a stationary steam turbine and running gas turbine.
  • the live steam slide In order to lower the live steam pressure in front of the steam turbine, the live steam slide must be closed at the moment. By bypassing the live steam slide, the live steam pressure in front of the steam turbine is slowly built up. After heating the live steam valve, a pressure equalization takes place before the live steam slide can then be opened. This eliminates the slow pressure build-up.
  • Another advantage is the following: In steam turbines, the control valves cool faster than the steam turbine itself. This makes it difficult for warm starts - these are conditions characterized by shutdowns between 24 to 72 hours - to find an optimal starting temperature for the steam turbine set. Through the approach of a warm-up regulator, the component temperature of the live steam control valves can first be adapted to that of the steam turbine. The impact of the steam turbine is thus trouble-free and even life-saving.
  • Another advantage is that existing equipment can be used by trained as a servo valve quick-closing valve.
  • the FIG. 1 shows a steam power plant 1 comprising an arrangement 2.
  • the arrangement 2 comprises a steam line 3 and a arranged in the steam line 3 control valve 5.
  • the control valve 5 has a control valve opening, wherein the control valve 5 is formed such that the control valve 5 any intermediate position of Control valve opening allows.
  • the arrangement 2 comprises a arranged in the steam line 3 quick-closing valve 4.
  • the quick-closing valve 4 has a quick-closing valve opening, wherein the control valve 5 and the quick-acting valve 4 are connected in series.
  • the quick-closing valve 4 is designed such that the quick-closing valve 4 allows any intermediate position of the quick-closing valve opening.
  • the steam line 3 is fluidically connected to a steam generator 6.
  • steam is produced which has comparatively high temperatures and pressures. This steam is flowing through the steam line 3 and the series-connected control valve 5 and quick-acting valve 4 to an inflow region 7 of a steam turbine 8.
  • the steam turbine 8 comprises z. B. a high pressure, medium pressure or low pressure turbine part.
  • the steam turbine 8 without sub-turbines such.
  • B high pressure, medium pressure or low pressure turbine sections.
  • the steam turbine 8 comprises a rotatably mounted rotor (not shown).
  • the thermal energy of the steam generated in the steam generator 6 is converted into rotational energy of the rotor.
  • the rotor is connected to transmit torque to a generator 9.
  • the generator 9 generates electrical energy with which an electrical supply network can be supplied.
  • the steam flowing into the steam turbine 8 via the inflow region 7 flows along a flow channel, with the temperature and the pressure decreasing.
  • the steam flows via a further steam line 11 to a condenser 12.
  • the steam condenses to water and is returned to the steam generator 6 via a pump 13.
  • the control valve 5 must be warmed up properly. According to the invention, this is done by a method for warming the control valve 5, wherein the control valve 5 is arranged in the steam line 3 and the control valve 5 is formed such that the control valve 5 allows any intermediate position of the control valve opening, wherein arranged in the steam line 3, a quick-closing valve 4 is, wherein the quick-closing valve 4 is formed such that the quick-closing valve 4 allows any intermediate position of the quick-closing valve opening, the quick-closing valve 4 is used to preheat the control valve 5.
  • the quick-closing valve 4 is opened from a closed position as a function of the thermal stress in the control valve 5.
  • the quick-closing valve 4 is opened so that the thermal stress in the control valve 5 under a Limit value is.
  • the quick-acting valve 4 is operated such that the thermal load in the control valve 5 is reduced.
  • FIG. 2 shows a representation of a warm-up regulator for the control valve. 5
  • a desired value 14, which represents the maximum component temperature difference is compared with an actual value 15, the actual value 15 being subtracted from the desired value 14.
  • the actual value 15 shows the actual component temperature difference.
  • the control deviation 16 created from the desired value 14 and the actual value 15 is fed to a controller 17, which is designed as a PI heating controller.
  • the controller 17 generates a manipulated variable 18.
  • This manipulated variable 18 is fed to a controlled system 19.
  • the derived therefrom further control deviation 21 is a controller 22, which is designed as a P-position controller, continued.
  • the controller 22 determines a manipulated variable 23.
  • This further manipulated variable 23 is supplied to a valve drive 24.
  • Further influencing variables in the controlled system 19 are a valve characteristic 25, a live steam line 26 and a component temperature difference 27.
  • the actual value 15 is the output value.
  • the gain of the inner control loop (setting controller 22) is set first. Subsequently, the superimposed control loop (heating controller 17) is set.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Control Of Turbines (AREA)
EP16170764.1A 2016-05-23 2016-05-23 Vorrichtung und verfahren zum aufwärmen eines stellventils Withdrawn EP3249183A1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP16170764.1A EP3249183A1 (de) 2016-05-23 2016-05-23 Vorrichtung und verfahren zum aufwärmen eines stellventils
CN201780032279.3A CN109196189B (zh) 2016-05-23 2017-04-21 用于加热阀的方法
PCT/EP2017/059476 WO2017202549A1 (de) 2016-05-23 2017-04-21 Verfahren zum aufwärmen eines ventils

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16170764.1A EP3249183A1 (de) 2016-05-23 2016-05-23 Vorrichtung und verfahren zum aufwärmen eines stellventils

Publications (1)

Publication Number Publication Date
EP3249183A1 true EP3249183A1 (de) 2017-11-29

Family

ID=56117482

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16170764.1A Withdrawn EP3249183A1 (de) 2016-05-23 2016-05-23 Vorrichtung und verfahren zum aufwärmen eines stellventils

Country Status (3)

Country Link
EP (1) EP3249183A1 (zh)
CN (1) CN109196189B (zh)
WO (1) WO2017202549A1 (zh)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003093653A1 (de) * 2002-05-03 2003-11-13 Alstom Technology Ltd Dampfturbine
EP1775429A1 (de) * 2005-10-12 2007-04-18 Siemens Aktiengesellschaft Verfahren zum Aufwärmen einer Dampfturbine
EP2351913A1 (de) * 2010-01-12 2011-08-03 Siemens Aktiengesellschaft Dampfkraftwerk
WO2014037386A2 (en) * 2012-09-10 2014-03-13 Hse Hitit Solar Enerji Anonim Sirketi A solar energy system
EP2918797A1 (de) * 2014-03-12 2015-09-16 Siemens Aktiengesellschaft Verfahren zum Betreiben einer Dampfkraftanlage

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201218519Y (zh) * 2008-04-28 2009-04-08 宝山钢铁股份有限公司 煤、气混烧锅炉再热减温辅助调节装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003093653A1 (de) * 2002-05-03 2003-11-13 Alstom Technology Ltd Dampfturbine
EP1775429A1 (de) * 2005-10-12 2007-04-18 Siemens Aktiengesellschaft Verfahren zum Aufwärmen einer Dampfturbine
EP2351913A1 (de) * 2010-01-12 2011-08-03 Siemens Aktiengesellschaft Dampfkraftwerk
WO2014037386A2 (en) * 2012-09-10 2014-03-13 Hse Hitit Solar Enerji Anonim Sirketi A solar energy system
EP2918797A1 (de) * 2014-03-12 2015-09-16 Siemens Aktiengesellschaft Verfahren zum Betreiben einer Dampfkraftanlage

Also Published As

Publication number Publication date
WO2017202549A1 (de) 2017-11-30
CN109196189A (zh) 2019-01-11
CN109196189B (zh) 2021-02-05

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