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steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating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steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type
• • 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steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating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steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type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

Definitions

• the present invention relates to a method for starting up a steam turbine system comprising a steam generator, a steam turbine connected to the steam generator, comprising at least two turbine stages, the ren at the time of startup of the steam turbine different réellestemperatu- ren, a connected to the steam turbine condenser and one of the Steam turbine driven consumer, in which the steam turbine is started up with the steam generated in the steam generator.
• Steam turbine systems are known in the prior art in various configurations. They include one
• Steam turbine which is divided into several turbine stages. For example, a high-pressure stage, a medium-pressure stage and a low-pressure stage may be provided.
• steam produced in the steam generator is supplied to and steamed in the steam generator.
• thermal energy is converted into mechanical energy, which is used to drive a consumer, such as a generator.
• a known way to reduce this waiting time is to start the steam turbine system already when the steam temperature is still below the temperature of the hot th turbine stage is located. This is basically permissible if the steam temperature is increased fast enough. However, this approach is accompanied by a shortening of the life of the steam turbine, which should be avoided.
• the present invention provides a method for starting a steam turbine system of the type mentioned, which is characterized in that until reaching a predetermined temperature of the im
• the hotter turbine stage is flown, after which the steam turbine system can absorb the full power.
• the turbine stage higher output temperature is connected to reach the predetermined temperature to reduce the ventilation power to the capacitor such that in the turbine stage higher output temperature introduced sealing vapor is passed into the condenser and condensed there. In this way it is ensured that the ventilation performance is permissible low.
• the steam generated in the steam generator is passed to the turbine stage of lower starting temperature until the predetermined temperature is reached by a bypass line which bypasses the turbine stage of a higher outlet temperature.
• the steam turbine system is designed such that the turbine stage higher output temperature is a high-pressure stage.
• the steam turbine system 1 shown in the drawing comprises a steam generator 2, a steam turbine 3 with a high-pressure stage 4, a medium-pressure stage 5 and a low-pressure stage 6, a condenser 7, a reheater 8, a second steam generator 9 and a consumer 10, in which it For example, it is a generator.
• the steam generator 2 is connected to the high-pressure stage 4 via a steam line 11, the steam line 11 being connected to a high-pressure stage 4.
• Nem shut-off valve 12 is provided which is adapted to shut off or open the steam line 11 optional.
• the high pressure stage 4 is over a cold
• Reheater line 13 connected to the reheater 8.
• a provided in the cold reheater line 13 check valve 14 ensures that a flow in the direction of the high-pressure stage 4 is prevented.
• From the cold reheater line 13 branches off a drain line 15, which leads to the condenser 7 and can be selectively opened or closed via a check valve 16. Between the steam pipe 11 and the cold
• Reheater line 13 extends a likewise provided with a shut-off valve 17 bypass line 18 which is arranged such that it branches off upstream of the Absperrven- tils 12 of the steam line 11 and downstream behind the check valve 14 in the cold
• Reheater line 13 opens.
• the reheater 8 is connected to the intermediate pressure stage 5 via a hot reheater line 19, which can be selectively opened or closed via a shut-off valve 20. From the hot
• Reheater line 19 branches off a likewise provided with a shut-off valve 21 bypass line 22, which leads to the condenser 7.
• the medium-pressure stage 5 is connected via a connecting line 23 to the low-pressure stage 6.
• In the connecting line 23 opens a steam line 24, can be passed through the steam generated by the second steam generator 9 in the connecting line 23 to the low pressure stage 6.
• the steam line 24 is provided with a check valve 25 which blocks a flow of steam in the direction of the second steam generator 9.
• From the steam line 26 branches off a provided with a shut-off valve 26 bypass line 27, which opens into the condenser 7.
• the low-pressure stage 6 is connected via a connecting line 28 to the capacitor 7.
• the capacitor 7 is in turn connected via a capacitor line 29 to the steam generator system.
• the shut-off valve 12 of the steam line 11 is closed. Furthermore, the shut-off valve 17 of the bypass line 18 is opened. The steam generated in the steam generator 2 is thus passed via the bypass line 18 to the reheater 8, further heated there and fed from there via the hot reheater line 19 of the medium-pressure stage 5.
• Reheater line 19 is opened while the shut-off valve 21 of the bypass line 22 is closed. Accordingly, the medium-pressure stage 5 is flown, so that the steam turbine system 1 receives a partial power.
• the steam emerging from the medium-pressure stage 5 is conducted via the connecting line 23 to the low-pressure stage 6.
• the steam is added via the steam line 24 as needed in the second steam generator 9 produced steam.
• the low-pressure stage 6 is flown.
• the steam leaving the low-pressure stage 6 is conducted via the connecting line 28 into the condenser 7 and condensed there.
• the condensate is routed via the condensate line 29 back to the steam generator system.
• the high-pressure stage 4 is meanwhile connected to the condenser 7 by opening the shut-off valve 16 via the emptying line 15, so that sealing steam introduced into the high-pressure stage 4 is conducted into the condenser 7 and condensed there.
• the shut-off valve 17 of the bypass line 18 and the shut-off valve 16 of the discharge line become 15 closed and the shut-off valve 12 of the steam line 11 is opened.
• the steam generated in the steam generator 2 flows via the steam line 11 to the high-pressure stage 4 in order to flow through it.
• the high pressure stage 4 leaving cool steam is on the cold Reheater line 13 to the reheater 8 passed where it is heated.
• the shut-off valve 16 of the discharge line 15 leading to the condenser 7 is closed at this time.
• the steam heated in the reheater 8 is then, as already described above, fed via the hot reheater line 19 to the medium-pressure stage 5 and then to the low-pressure stage 6.
• High-pressure stage 4 is required, the steam generated in the steam generator 2 is passed to the high-pressure stage 4 to the intermediate pressure stage 5, the waiting time can be shortened taking a small power. As soon as the steam generated in the steam generator 2 has reached the predetermined temperature, the high-pressure stage 4 is connected, so that the steam turbine system 1 receives the desired power. A reduction in the life of the steam turbine system 1 is not associated with this approach.

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• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Control Of Turbines (AREA)

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• 2014
  • 2014-06-23 DE DE102014211976.6A patent/DE102014211976A1/de not_active Withdrawn
• 2015
  • 2015-04-30 US US15/315,435 patent/US10385733B2/en active Active
  • 2015-04-30 WO PCT/EP2015/059466 patent/WO2015197238A1/de active Application Filing
  • 2015-04-30 EP EP15719228.7A patent/EP3129611A1/de active Pending
  • 2015-04-30 CN CN201580033602.XA patent/CN106460566B/zh active Active

Non-Patent Citations (2)

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