EP3111059A1 - Steam cycle, and method for operating a steam cycle - Google Patents
Steam cycle, and method for operating a steam cycleInfo
- Publication number
- EP3111059A1 EP3111059A1 EP15716068.0A EP15716068A EP3111059A1 EP 3111059 A1 EP3111059 A1 EP 3111059A1 EP 15716068 A EP15716068 A EP 15716068A EP 3111059 A1 EP3111059 A1 EP 3111059A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- steam
- pressure turbine
- turbine
- pressure
- starting
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 28
- 230000001105 regulatory effect Effects 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 235000008694 Humulus lupulus Nutrition 0.000 claims 1
- 244000025221 Humulus lupulus Species 0.000 claims 1
- 238000007599 discharging Methods 0.000 claims 1
- 238000007789 sealing Methods 0.000 abstract 1
- 239000002699 waste material Substances 0.000 abstract 1
- 239000003990 capacitor Substances 0.000 description 2
- NQLVQOSNDJXLKG-UHFFFAOYSA-N prosulfocarb Chemical compound CCCN(CCC)C(=O)SCC1=CC=CC=C1 NQLVQOSNDJXLKG-UHFFFAOYSA-N 0.000 description 2
- 238000003303 reheating Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 235000010678 Paulownia tomentosa Nutrition 0.000 description 1
- 240000002834 Paulownia tomentosa Species 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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
- 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
- F01K7/22—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 the turbines having inter-stage steam heating
-
- 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
- F01K9/04—Plants characterised by condensers arranged or modified to co-operate with the engines with dump valves to by-pass stages
Definitions
- the present invention relates to a steam cycle for a power plant and a method for operating a steam cycle.
- the starting line In order to convert steam turbines from the prior art of starting operation or idling in the power operation, the starting line is closed. Closing the starting line is necessary because the mass flow of the steam, which is supplied to the condenser via the starting line, is not available for cooling the intermediate superheating.
- Too fast closing of the starting line leads to pressure fluctuations in the water / steam cycle, which can lead to a turbine short circuit. Too slow an increase in the mass flow through the high ⁇ pressure turbine during the closing of the Anfahrtechnisch leads to unacceptably high temperatures in the exhaust steam behind the high-pressure turbine.
- the two mentioned requirements require an optimal coordination of closing the starting line and opening the
- WO 2013/031121 AI a steam turbine apparatus and a method for their operation is shown, wherein a starting of the steam turbine by means of a Kochström Oberssystems kontrol ⁇ is profiled.
- the object of the invention is to make the start-up process "smoother" and more fluid and thus lower the load on the components.
- the water vapor circuit according to claim 1 and the method according to the invention for operating a What ⁇ serdampf Vietnamese intro to claim 8 offer over the prior art has the advantage that a controller is provided which closing the valve to obstruct the Anfahrlei- direction and opening the live steam valves so regulates that
- the reheater is always sufficiently supplied with steam.
- An advantageous development of the steam cycle is that the controller for closing the starting valve and the controller for opening the live steam valves are integrated in a common module. Depending on the operating sizes Be ⁇ "pressure”, “temperature” and “speed”, which are detected by corresponding sensors, the common controller can control the opening of the main steam valves and the closing of the diverter valve ⁇ SEN.
- a further advantageous development is that the starting line between the high-pressure turbine and the reheater springs and opens into the condenser.
- a further advantageous development consists in that in a line section between the high-pressure turbine and the reheater a check-back device is provided which prevents a backflow of the steam in the direction of the high-pressure turbine.
- a check-back device reliably ensures that in no operating state steam flows back from the reheater into the high-pressure turbine and possibly favors a turbine quick-closing.
- a particularly simple and effective check means is a check valve.
- a further advantageous development is that at least in sections parallel to the Anfahrtechnisch another line is arranged, which also connects the high ⁇ pressure turbine or the Abdampf Scheme with the capacitor.
- An inventive development of the method is that the pressure of the steam prior to entry into the high ⁇ pressure turbine, in particular in a blading space of the high-pressure turbine, time-delayed and ramped raised.
- Mass flow through the high-pressure turbine easily controlled ⁇ who.
- High-pressure turbine in particular before entering the Beschau ⁇ felungsraum, takes place at a defined position of the Anfahrventils.
- a defined position of the starting valve which partially closes the start-up line, can limit the mass flow through the start-up line and thus be used as a further control variable.
- opening of the live steam valves can be controlled by increasing the pressure setpoint at a pressure limiting regulator before entering the high pressure turbine or in the blading space.
- a defi ned ⁇ opening the main steam valves at the same time defi ned ⁇ position of the diverter valve the mass flow can be controlled more precisely by the high pressure turbine.
- FIG. 1 shows a schematic representation of a steam circuit according to the invention.
- Fig. 2 shows a flowchart of an inventive
- FIG. 1 shows a steam circuit 10 with a high ⁇ pressure turbine 12, an intermediate pressure turbine 50 and a Nie ⁇ derdruckturbine 60.
- the turbines (12,50,60) are arranged on a common shaft which is coupled to a non Darge ⁇ set generator ,
- the steam circuit 10 further includes a steam generator 30, a condenser 40 and a feed pump 70.
- the steam generator 30 is connected via a first line 17 to the high-pressure turbine 12, wherein the first line 17 live steam valves 14,15 are arranged, via which a steam supply the steam generator 30 can be prevented.
- the main steam valve 14 acts as a live steam quick- closing valve and the live steam ⁇ valve 15 as a steam control valve.
- a pressure limiting controller 29 is arranged, via which the mass flow of steam from the steam generator 30 to the high-pressure turbine 12 can be limited.
- the high-pressure turbine 12 is followed in the flow direction of the steam, a Abdampf Suite 13, which is supplied with steam leaving the high-pressure turbine 12 at the outlet.
- the exhaust steam region 13 is connected to a reheater 20 via a line section 18, in which a non-return valve 19 is arranged.
- the reheater 20 is connected to the medium-pressure turbine 50 via a line 37, in which live steam valves 38, 39 are arranged for shutting off or regulating the steam supply.
- the SwissGermanhit ⁇ zer 20 is further connected via a line 35 to the condenser 40, wherein in the line 35, a medium-pressure Umleit ⁇ station 36 is arranged downstream with Abspschreibeter 33, with which the pressure supply of the medium-pressure turbine 50 can be controlled.
- the steam generator 30 is furthermore connected to the reheater 20 via a line 21, in which a high-pressure bypass station 22 and a spraying device 55 are arranged.
- the exhaust steam region 13 is connected to the condenser 40 via a starting line 23, 25.
- a starting valve 27 and a spraying device 34 are arranged in the approach line 25.
- the starting valve 27 can be regulated via a controller 26 and can be partially opened between the positions "completely open” and "completely closed” at least in discrete intermediate stages. Alternatively, a completely controllable starting valve 27 would be possible. Zusharm ⁇ Lich a draining pipe is disposed in parallel to the 28 Anfahrtechnisch 25 which also leads into the condenser 40th
- the drain line can be opened via a drain valve 24.
- the steam generator 30 is connected via a line 52 to the low-pressure turbine 60, wherein in the line 52, a Re ⁇ flap valve 53 is arranged, which controls the steam supply to the low-pressure turbine 60.
- the medium-pressure turbine 50 is connected via a line 51 to the low-pressure turbine 60, wherein the conduit 52 opens into the conduit 51.
- From the Nie ⁇ derdruckturbine 60 leads a line 54 to the condenser 40, which in turn is connected via a line 41 to the feed pump 70.
- the feed pump 70 is connected via a line 42 to the steam generator 30.
- the steam circuit 10 of the Dampferer ⁇ generator 30 is supplied via the pressure-building feed pump 70 and the line 42 with water.
- the water is evaporated and overheated.
- This steam is supplied via the first line 17 of the high pressure turbine 12, wherein the steam is partially relaxed.
- the steam is again supplied with energy in the reheater 20, which it discharges via the medium-pressure turbine 50 and the low-pressure turbine 60.
- the expanded steam then condenses in the condenser 40 and is returned via the line 41 as water to the steam generator 30, whereby the circuit is closed.
- a regulator 26 which opens the starting valve 27 as a function of temperature, pressure and speed of the high-pressure turbine 12.
- the corresponding Sen ⁇ sensors for detecting the rotational speed are not shown, but can simply on the shaft which supports the turbine stages 12,50,60, and is connected to the generator, are angeord ⁇ net.
- FIG. 2 shows a flow diagram for starting up a steam cycle with a steam turbine.
- [100] thus be ⁇ begun will launch a starting operation of the steam turbine 12,50,60 in a first process step.
- the steam turbine 12, 50, 60 is accelerated by complete opening of the fresh steam quick-closing valves 14, 38 and subsequent opening of the live steam valves 15, 39.
- the Anfahrtechnisch 25 is opened by opening of the diverter valve 27 and turning on the Druckbe ⁇ grenzungsregler 29th
- a heating-up speed is achieved and the
- the closing operation of the on ⁇ running valve 27 25 to close the Anfahrtechnisch from a defined position of the diverter valve 27 begins is in the subsequent process steps [170], [171], [172], [173], a pressure setpoint of Pressure limiting controller 29 time-delayed and ramped and raised at a certain speed. This results in a defined opening of the live steam valves 15,39. This process continues until the mass flow of steam through the high pressure turbine 12 has exceeded a threshold.
- a final method step [180] the Anfahrtechnisch 25 and the on ⁇ traveling valve 27 completely closed and the steam turbine
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Turbines (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP14167157.8A EP2942493A1 (en) | 2014-05-06 | 2014-05-06 | Steam circuit and a method for operating a steam circuit |
PCT/EP2015/058308 WO2015169562A1 (en) | 2014-05-06 | 2015-04-16 | Steam cycle, and method for operating a steam cycle |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3111059A1 true EP3111059A1 (en) | 2017-01-04 |
EP3111059B1 EP3111059B1 (en) | 2020-03-25 |
Family
ID=50687279
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14167157.8A Withdrawn EP2942493A1 (en) | 2014-05-06 | 2014-05-06 | Steam circuit and a method for operating a steam circuit |
EP15716068.0A Active EP3111059B1 (en) | 2014-05-06 | 2015-04-16 | Steam circuit and a method for operating a steam circuit |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14167157.8A Withdrawn EP2942493A1 (en) | 2014-05-06 | 2014-05-06 | Steam circuit and a method for operating a steam circuit |
Country Status (8)
Country | Link |
---|---|
US (1) | US10167742B2 (en) |
EP (2) | EP2942493A1 (en) |
JP (1) | JP6685237B2 (en) |
KR (1) | KR20160148013A (en) |
CN (1) | CN106255807B (en) |
BR (1) | BR112016025215A2 (en) |
RU (1) | RU2653617C1 (en) |
WO (1) | WO2015169562A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3444449A1 (en) * | 2017-08-18 | 2019-02-20 | Siemens Aktiengesellschaft | Installation with bypass station |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4576008A (en) * | 1984-01-11 | 1986-03-18 | Westinghouse Electric Corp. | Turbine protection system for bypass operation |
JPS6193208A (en) * | 1984-10-15 | 1986-05-12 | Hitachi Ltd | Turbine bypass system |
US4691086A (en) | 1986-04-03 | 1987-09-01 | Indak Manufacturing Corp. | Pushbutton electrical switch having a flairing contactor loosely rotatable on a spring-biased eyelet |
US5435138A (en) * | 1994-02-14 | 1995-07-25 | Westinghouse Electric Corp. | Reduction in turbine/boiler thermal stress during bypass operation |
US5473898A (en) * | 1995-02-01 | 1995-12-12 | Westinghouse Electric Corporation | Method and apparatus for warming a steam turbine in a combined cycle power plant |
RU35374U1 (en) * | 2003-10-16 | 2004-01-10 | Открытое акционерное общество "Ленинградский Металлический завод" | DEVICE FOR STARTING POWER UNIT OF HEAT POWER PLANTS |
US8484975B2 (en) * | 2008-02-05 | 2013-07-16 | General Electric Company | Apparatus and method for start-up of a power plant |
US7987675B2 (en) * | 2008-10-30 | 2011-08-02 | General Electric Company | Provision for rapid warming of steam piping of a power plant |
JP5221443B2 (en) * | 2009-05-08 | 2013-06-26 | 株式会社東芝 | Method for starting single-shaft combined cycle power plant and single-shaft combined cycle power plant |
US8783043B2 (en) * | 2009-07-15 | 2014-07-22 | Siemens Aktiengesellschaft | Method for removal of entrained gas in a combined cycle power generation system |
EP2503112A1 (en) * | 2011-03-24 | 2012-09-26 | Siemens Aktiengesellschaft | Method for quick connection of a steam generator |
JP5734792B2 (en) | 2011-08-30 | 2015-06-17 | 株式会社東芝 | Steam turbine plant and operation method thereof |
-
2014
- 2014-05-06 EP EP14167157.8A patent/EP2942493A1/en not_active Withdrawn
-
2015
- 2015-04-16 RU RU2016147413A patent/RU2653617C1/en active
- 2015-04-16 EP EP15716068.0A patent/EP3111059B1/en active Active
- 2015-04-16 KR KR1020167033771A patent/KR20160148013A/en active Search and Examination
- 2015-04-16 JP JP2016566684A patent/JP6685237B2/en active Active
- 2015-04-16 WO PCT/EP2015/058308 patent/WO2015169562A1/en active Application Filing
- 2015-04-16 US US15/306,545 patent/US10167742B2/en active Active
- 2015-04-16 CN CN201580023915.7A patent/CN106255807B/en active Active
- 2015-04-16 BR BR112016025215A patent/BR112016025215A2/en not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
CN106255807B (en) | 2018-02-23 |
RU2653617C1 (en) | 2018-05-11 |
EP3111059B1 (en) | 2020-03-25 |
US20170044935A1 (en) | 2017-02-16 |
WO2015169562A1 (en) | 2015-11-12 |
JP6685237B2 (en) | 2020-04-22 |
BR112016025215A2 (en) | 2017-08-15 |
CN106255807A (en) | 2016-12-21 |
KR20160148013A (en) | 2016-12-23 |
US10167742B2 (en) | 2019-01-01 |
EP2942493A1 (en) | 2015-11-11 |
JP2017521591A (en) | 2017-08-03 |
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