EP3444449A1 - Installation dotée d'une station de dérivation - Google Patents

Installation dotée d'une station de dérivation Download PDF

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Publication number
EP3444449A1
EP3444449A1 EP17186874.8A EP17186874A EP3444449A1 EP 3444449 A1 EP3444449 A1 EP 3444449A1 EP 17186874 A EP17186874 A EP 17186874A EP 3444449 A1 EP3444449 A1 EP 3444449A1
Authority
EP
European Patent Office
Prior art keywords
line
medium
steam
pressure
pressure bypass
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Withdrawn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
EP17186874.8A
Other languages
German (de)
English (en)
Inventor
Matthias Heue
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
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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, Siemens Corp filed Critical Siemens AG
Priority to EP17186874.8A priority Critical patent/EP3444449A1/fr
Publication of EP3444449A1 publication Critical patent/EP3444449A1/fr
Withdrawn legal-status Critical Current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
    • 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steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating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steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type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
    • 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
    • F01K7/24—Control or safety means specially adapted therefor

Definitions

  • the invention relates to a system comprising a steam generator designed to generate steam, a steam turbine comprising a high-pressure turbine section, a medium-pressure turbine section, a bypass steam outlet unit, a live steam line which fluidly connects an outlet of the steam generator to an inlet of the high-pressure turbine section, a cold reheater line fluidly connecting an output of the high pressure turbine section to an input of the steam generator, a hot reheater line fluidly connecting an outlet of the steam generator to an inlet of the intermediate pressure turbine section with a first medium pressure bypass line , which fluidly connects the hot reheater line with the Umleitdampfausströmiens.
  • the invention relates to a method for operating a system.
  • steam power plants are used to generate electrical energy.
  • the steam turbines used in the steam power plants usually comprise a high-pressure turbine section, a medium-pressure turbine section and a low-pressure turbine section.
  • the steam generated in the steam generator is first fed to the high-pressure part-turbine and then flows to the medium-pressure turbine section and the low-pressure turbine section.
  • the thermal energy of the steam is thereby converted into rotational energy of the rotor, which drives an electric generator for generating electrical energy.
  • steam power plants with a high-pressure bypass are used between the live steam line and the cold reheater line and a medium-pressure bypass, which produces a fluidic connection from the hot reheater line to the condenser, optionally a low pressure bypass line connecting the low pressure line to the condenser equipped. If necessary, the bypass valves open.
  • the high-pressure steam flows into the reheater, while the medium-pressure bypass flows into the condenser.
  • cascading transfer systems are used, which are characterized in that the live steam is passed through the high-pressure bypass from the steam line to the cold reheater line. The steam then flows into the reheater in the boiler, which is thereby cooled and then out of the hot reheater line via the medium pressure bypass into the condenser.
  • the medium-pressure diversion must be carried out very large in order to set the required reheater pressure for starting.
  • the diameters of the pipelines must be increased to limit the flow rates.
  • the invention is thus proposed to lead a second medium-pressure diversion from the cold reheater line into the condenser.
  • the advantage is that less water has to be injected to cool the steam, as the steam in the medium pressure diversion comes from the cold reheater line.
  • a cheaper material for the pipeline, the valve and other components can be used.
  • the still required medium-pressure diversion, which connects the hot reheater line to the condenser, can be made smaller, resulting in further cost savings.
  • the bypass line can be used to remove the steam that is not needed to cool the superheater surfaces in the steam generator. As a result, the pipe diameters of the pipelines in the reheater piping system can be made smaller.
  • a flap in particular a non-return flap, is arranged in the cold reheater line, the branching of the second medium-pressure bypass line from the cold reheater line being downstream of the flap, in particular downstream of the non-return flap.
  • the system shown in the figure can be designed as a pure steam power plant or as part of a combined cycle power plant.
  • the plant 1 comprises a steam generator 2, which is designed to generate steam.
  • the steam generated in the steam generator 2 flows from an outlet 3 into a main steam line 4 into an inlet 5 of a high-pressure turbine section 6.
  • a quick-action valve 7 and a control valve 8 are arranged in the main steam line. With the quick-closing valve 7, the live steam supply to high-pressure turbine section is abruptly interrupted.
  • the control valve 8 is designed to control the amount of steam through the main steam line.
  • the high pressure turbine part 6 essentially comprises a housing (not shown) and a rotor-formed rotor (not shown).
  • the plant further comprises a medium-pressure turbine section 9 and a low-pressure turbine section 10.
  • the high-pressure turbine section 5, the medium-pressure turbine section 9 and the low-pressure turbine section 10 drive with the help of a common shaft 11, an electric generator 12 which is designed to generate electrical energy.
  • the fresh steam flowing into the high-pressure turbine section 6 via the inlet 5 comes from the steam generator 2, the thermal energy of the steam being converted into rotational energy of the shaft 11. Via an outlet 13 of the high-pressure turbine part 6, the steam flows in a cold reheater line 14 to an input 15 of the steam generator 2. In the steam generator 2, the steam flowing from the cold reheater line 14 is heated to a higher temperature and via an outlet 16 with a hot reheater line 17 with an input 18 of the medium-pressure turbine section 9 fluidly connected.
  • a medium-pressure quick-closing valve 19 and a medium-pressure control valve 20 is arranged in the hot reheater line 17.
  • the medium-pressure quick-acting valve 19 has the task to block the steam from the hot reheater line 17 abruptly.
  • the medium-pressure control valve 20 has the task of regulating the amount of steam flowing into the medium-pressure turbine section 9.
  • the thermal energy of the steam flowing into the medium-pressure turbine section 9 is converted into rotational energy.
  • the steam subsequently also flows from an outlet 21 of the medium-pressure turbine section 9 in an overflow line 22 to an inlet 23 of the low-pressure turbine section 10.
  • the thermal energy of the steam is converted into rotational energy of the shaft 11 in the low pressure turbine section 10.
  • the vapor then flows via a capacitor line 24 and an output 25 from the low-pressure turbine section 10 into the condenser 26.
  • no condenser line 24 is formed between the low-pressure turbine section 10 and the condenser 26, but the condenser is directly below or adjacent the low pressure turbine part 10.
  • a capacitor line junction is formed in this case.
  • the steam is converted by means of cooling lines 27 back to water. Via a feed water line 28, the water returns to the steam generator 2. This completes a cycle.
  • the live steam line 4 is fluidically connected to the cold reheater line 14 with a high pressure bypass line 29.
  • a high pressure bypass valve 30 and a high pressure bypass water injection 31 are arranged in the high pressure bypass line 29.
  • the high-pressure bypass valve 30 is normally closed and is opened in the so-called bypass mode.
  • the high-pressure bypass water injection 31 is formed such that the steam flowing in the high-pressure bypass pipe 29 is sprayed with water to lower the temperature of the steam.
  • a flap 32 in particular a non-return valve is arranged in the cold reheater line 14.
  • a branch 33 is arranged in the flow direction after the flap 32.
  • the cold reheater line 14 is fluidly connected at the junction 33 via a second medium-pressure bypass line 34 to the condenser 26.
  • a second medium-pressure bypass valve 35 is arranged in the second medium-pressure bypass line 34.
  • a second water injection 36 for injecting water is arranged in the second medium-pressure bypass line 34.
  • the plant 1 further comprises a first medium-pressure bypass line 37, which connects the hot reheater line 17 with the condenser 26 fluidly.
  • a medium-pressure bypass valve 38 and a water injection 39 is arranged in this first medium-pressure bypass line 37.
  • a bypass steam flows directly into the condenser 26 both through the first medium-pressure bypass line 37 and through the second medium-pressure bypass line 34.
  • the temperature of the steam is reduced by the water injection.
  • the amount of steam flow through the first medium-pressure bypass line 37 and the second medium-pressure bypass line 34 is regulated by the valves 35 and 38.
  • the diverting steam flows into a diverting steam outflow unit and from there into the environment.
  • the diverting steam outflow unit may be formed as a condenser 26, in which case the diverting steam flows into the condenser 26.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Turbines (AREA)
EP17186874.8A 2017-08-18 2017-08-18 Installation dotée d'une station de dérivation Withdrawn EP3444449A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP17186874.8A EP3444449A1 (fr) 2017-08-18 2017-08-18 Installation dotée d'une station de dérivation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17186874.8A EP3444449A1 (fr) 2017-08-18 2017-08-18 Installation dotée d'une station de dérivation

Publications (1)

Publication Number Publication Date
EP3444449A1 true EP3444449A1 (fr) 2019-02-20

Family

ID=59655968

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17186874.8A Withdrawn EP3444449A1 (fr) 2017-08-18 2017-08-18 Installation dotée d'une station de dérivation

Country Status (1)

Country Link
EP (1) EP3444449A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3607210A1 (de) * 1986-03-05 1986-08-28 Jürgen Dipl.-Ing. Rimmelspacher (FH), 8068 Pfaffenhofen Dampferzeuger mit no(pfeil abwaerts)x(pfeil abwaerts)-minderungsanlage
US4693086A (en) * 1984-10-15 1987-09-15 Hitachi, Ltd. Steam turbine plant having a turbine bypass system
DE10227709A1 (de) * 2001-06-25 2003-02-27 Alstom Switzerland Ltd Dampfturbinenanlage sowie Verfahren zu deren Betrieb
DE102008029941A1 (de) * 2007-10-16 2009-05-07 E.On Kraftwerke Gmbh Dampfkraftanlage und Verfahren zur Regelung der Leistung einer Dampfkraftanlage
US20140165565A1 (en) * 2011-08-30 2014-06-19 Kabushiki Kaisha Toshiba Steam turbine plant and driving method thereof
EP3109420A1 (fr) * 2015-06-25 2016-12-28 Siemens Aktiengesellschaft Procédé de refroidissement d'une turbomachine
US20170044935A1 (en) * 2014-05-06 2017-02-16 Siemens Aktiengesellschaft Steam cycle, and method for operating a steam cycle

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4693086A (en) * 1984-10-15 1987-09-15 Hitachi, Ltd. Steam turbine plant having a turbine bypass system
DE3607210A1 (de) * 1986-03-05 1986-08-28 Jürgen Dipl.-Ing. Rimmelspacher (FH), 8068 Pfaffenhofen Dampferzeuger mit no(pfeil abwaerts)x(pfeil abwaerts)-minderungsanlage
DE10227709A1 (de) * 2001-06-25 2003-02-27 Alstom Switzerland Ltd Dampfturbinenanlage sowie Verfahren zu deren Betrieb
DE102008029941A1 (de) * 2007-10-16 2009-05-07 E.On Kraftwerke Gmbh Dampfkraftanlage und Verfahren zur Regelung der Leistung einer Dampfkraftanlage
US20140165565A1 (en) * 2011-08-30 2014-06-19 Kabushiki Kaisha Toshiba Steam turbine plant and driving method thereof
US20170044935A1 (en) * 2014-05-06 2017-02-16 Siemens Aktiengesellschaft Steam cycle, and method for operating a steam cycle
EP3109420A1 (fr) * 2015-06-25 2016-12-28 Siemens Aktiengesellschaft Procédé de refroidissement d'une turbomachine

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