US20120111007A1 - Steam power plant with steam turbine unit and process steam consumer, and method for operating a steam power plant with steam turbine unit and process steam consumer - Google Patents

Steam power plant with steam turbine unit and process steam consumer, and method for operating a steam power plant with steam turbine unit and process steam consumer Download PDF

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Publication number
US20120111007A1
US20120111007A1 US13/383,292 US201013383292A US2012111007A1 US 20120111007 A1 US20120111007 A1 US 20120111007A1 US 201013383292 A US201013383292 A US 201013383292A US 2012111007 A1 US2012111007 A1 US 2012111007A1
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US
United States
Prior art keywords
steam
power plant
consumer
turbine unit
desuperheater
Prior art date
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Abandoned
Application number
US13/383,292
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English (en)
Inventor
Tilman Früh
Carsten Graeber
Mike Rost
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Siemens AG
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Siemens AG
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Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Assigned to SIEMENS AKTIENGESELLSCHAFT reassignment SIEMENS AKTIENGESELLSCHAFT ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FRUEH, TILMAN, GRAEBER, CARSTEN, ROST, MIKE
Publication of US20120111007A1 publication Critical patent/US20120111007A1/en
Abandoned 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
    • F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
    • F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/14—Combined heat and power generation [CHP]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/32—Direct CO2 mitigation

Definitions

  • the invention refers to a steam power plant with steam turbine unit and process steam consumer, especially a separator for carbon dioxide as the process steam consumer.
  • the invention also refers to a method for operating a steam power plant with a steam turbine unit and a process steam consumer.
  • Steam power plants (SPP) for generating electric power essentially comprise a steam turbine unit and a fired boiler, or, in the configuration as a gas and steam turbine power plant (CCPP), comprise a gas turbine unit with downstream heat recovery steam generator and steam turbine unit. Steam or power for secondary processes, which are not directly associated with the electric power generation, are customarily extracted from power plants of these types at corresponding points.
  • a flue gas scrubbing plant for example a carbon dioxide separator, which is connected downstream to the power plant, is operated with process steam which is extracted from the steam turbine unit at an intermediate stage of the steam turbine unit.
  • a further example of process steam extraction from the steam turbine unit is district heating supply.
  • the quantity of extracted steam in this case is dependent upon the mode of operation of the process steam consumer or of the separator for carbon dioxide.
  • the extracted quantity of steam in this case leads to a reduction of the mass flow of steam which is absent from the following turbine stages of the steam turbine unit after the extraction.
  • process steam consumers such as a carbon dioxide separator, require process steam at a corresponding pressure and temperature level.
  • the object of the invention which is focused upon a steam power plant is achieved with a steam power plant with at least one steam turbine unit and a process steam consumer, wherein the process steam consumer comprises a heat exchanger, and the steam turbine unit is connected via a bleed line to the heat exchanger, wherein a desuperheater is connected into the bleed line on the primary side.
  • the invention in this case is based on the idea of achieving a conditioning of a process steam, which is extracted from the steam turbine unit, for the process steam consumer by means of a desuperheater.
  • the desuperheater By means of the desuperheater, it is possible to bring the process steam to a temperature level which is optimized for the process steam consumer.
  • the desuperheater enables a further use of the energy which is extracted from the process steam.
  • Desuperheaters of this type can be designed as heat exchangers, the desuperheater absorbing energy on the primary side and transferring it to a medium on the secondary side in the process.
  • the invention therefore enables use of the energy which is extracted by means of the desuperheater during simultaneous conditioning of the process steam for the downstream process steam consumer, as a result of which the overall efficiency of the steam power plant is appreciably increased.
  • the invention can also be realized, moreover, with shorter piping routes compared with known interconnections, as a result of which costs for the steam power plant are reduced.
  • the steam power plant furthermore comprises a water-steam cycle with a main condensate line and a return condensate line, wherein the desuperheater is connected into the return condensate line on the secondary side.
  • This type of interconnection advantageously enables use of the energy which is drawn from the process steam by means of the desuperheater for preheating a condensate in the water-steam cycle of the steam power plant.
  • a preheater for condensate preheating which is connected downstream to the desuperheater on the secondary side, is unloaded.
  • the bled steam from the steam turbine unit which is required for this preheater can be reduced, as a result of which the portion of operating steam in the steam turbine unit is increased.
  • a larger quantity of steam becomes necessary for feeding into the desuperheater in order to be able to provide the same amount of heat, in the form of process steam, for the process steam consumer. Therefore, by using the desuperheater, a shift of the steam quantities especially takes place, but since the bled steam which is at higher pressure, and therefore of higher quality, is reduced, an efficiency enhancement of the steam power plant results from this.
  • the process steam consumer is a separator for carbon dioxide from a flue gas.
  • Carbon dioxide separators of this type require a large quantity of thermal energy which inevitably is extracted from the water-steam cycle of the steam turbine power plant in the form of process steam.
  • the extracted process steam in this case is required particularly for the desorption or regeneration of a solvent.
  • a process requirement of the flue gas scrubbing is a minimum temperature level, as a result of which, in the case of heat transfer by condensation according to current knowledge, a minimum pressure of the process steam of between 2 and 4 bar results. At this pressure level, the steam, during a normal power plant process with reheating and high steam temperatures, is still highly superheated.
  • the energy of the superheated steam can be used only unsatisfactorily in a desorption process without upstream desuperheating since only the saturated steam level of the process steam is relevant for the transfer of heat.
  • the bleed line is advantageously connected to the crossover line of the steam turbine unit.
  • the crossover line connects the intermediate-pressure turbine to the low-pressure turbine.
  • An extraction of process steam at the crossover line is constructionally simpler to realize than the extraction of process steam between the stages of the steam turbines.
  • the object of the invention which is focused upon a method is achieved by means of a steam power plant with a steam turbine unit and process steam consumer, wherein superheated steam is extracted from the steam turbine unit at a first process stage, and at a second process stage the superheated steam is desuperheated, wherein heat is extracted from the superheated steam and slightly superheated steam is formed, and wherein the slightly superheated steam is fed to the process steam consumer.
  • the invention is based in this case on the consideration of providing for the process steam consumer a conditioned steam, in the form of slightly superheated steam, which was previously extracted in a first process stage from the steam turbine unit in the form of superheated steam and which was desuperheated in a second process stage.
  • the steam power plant furthermore comprises a water-steam cycle, wherein the heat which is extracted from the superheated steam is fed to the condensate of the water-steam cycle of the steam power plant.
  • the energy which is drawn from the desuperheater can be used for preheating a condensate in the water-steam cycle of the steam power plant.
  • a preheater for condensate preheating which is connected downstream to the desuperheater on the secondary side, is unloaded. The necessary bled steam from the steam turbine unit can be reduced for this preheater, as a result of which the portion of operating steam in the steam turbine unit is increased.
  • the slightly superheated or conditioned steam is used in the process steam consumer for the separation of carbon dioxide.
  • the conditioned steam in this case is used especially for the desorption or regeneration of a solvent.
  • the superheated steam is advantageously extracted from the steam turbine unit from the crossover line between the intermediate-pressure stage and the low-pressure stage.
  • An extraction of the process steam at the crossover line is constructionally simpler to realize than the extraction of process steam between the stages of the steam turbines.
  • the steam power plant 1 which is shown in FIG. 1 essentially shows a steam turbine unit 2 and a process steam consumer 3 and also a desuperheater 6 .
  • the steam turbine unit 2 shows an intermediate-pressure turbine 9 and a low-pressure turbine 10 , which are interconnected via a crossover line 11 .
  • superheated steam leaving the intermediate-pressure turbine 9 can therefore be transferred into the low-pressure turbine 10 .
  • the bleed line 5 is connected to the crossover line 11 . Some of the superheated steam can be branched off from the crossover line 11 through the bleed line 5 .
  • the bleed line 5 is furthermore connected to the desuperheater 6 on the primary feed side.
  • the desuperheater 6 On the primary discharge side, the desuperheater 6 is connected to the process steam consumer 3 .
  • heat is extracted from superheated steam which is guided in the bleed line 5 . Slightly superheated steam leaves the desuperheater on the primary discharge side.
  • the process steam consumer 3 in this case is shown only schematically.
  • An essential interface point of the process steam consumer 3 with the steam turbine unit is especially a heat exchanger 4 which comprises the process steam consumer 3 .
  • the saturated steam which is formed in the desuperheater 6 as a result of heat extraction, is fed to the heat exchanger 4 of the process steam consumer 3 . In so doing, heat from the saturated steam is transferred to the process steam consumer, wherein the saturated steam condenses.
  • the return condensate from the process steam consumer 3 is now fed via the return condensate line 13 to the desuperheater 6 on the secondary feed side.
  • the condensate is heated and discharged from the desuperheater 6 on the secondary side.
  • the discharging in this case is carried out into the main condensate line 8 of the water-steam cycle 7 of the steam power plant 1 .
  • the condensate is provided for re-evaporation and reintroduction into the steam turbine unit 2 .
  • the preheater 12 a As a result of heating the condensate from the process steam consumer 3 in the desuperheater 6 , the preheater 12 a is unloaded. As a result of unloading the preheater 12 a, less steam has to be extracted from the steam turbine unit 2 for preheating the condensate. Consequently, the portion of operating steam in the steam turbine unit 2 is increased, from which results an efficiency enhancement of the steam power plant 1 .

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
  • Control Of Turbines (AREA)
US13/383,292 2009-07-15 2010-06-17 Steam power plant with steam turbine unit and process steam consumer, and method for operating a steam power plant with steam turbine unit and process steam consumer Abandoned US20120111007A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP09165561.3 2009-07-15
EP09165561A EP2290200A1 (fr) 2009-07-15 2009-07-15 Installation de centrale à vapeur dotée d'une unité de turbine à vapeur et récepteur de vapeur de traitement ainsi que procédé de fonctionnement d'une installation de centrale à vapeur dotée d'une unité de turbine à vapeur et récepteur de vapeur de traitement
PCT/EP2010/058517 WO2011006728A1 (fr) 2009-07-15 2010-06-17 Installation de centrale thermique à vapeur présentant un ensemble turbine à vapeur et un consommateur de vapeur de traitement, et procédé permettant de faire fonctionner une installation de centrale thermique à vapeur présentant l’ensemble turbine à vapeur et le consommateur de vapeur de traitement

Publications (1)

Publication Number Publication Date
US20120111007A1 true US20120111007A1 (en) 2012-05-10

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US13/383,292 Abandoned US20120111007A1 (en) 2009-07-15 2010-06-17 Steam power plant with steam turbine unit and process steam consumer, and method for operating a steam power plant with steam turbine unit and process steam consumer

Country Status (5)

Country Link
US (1) US20120111007A1 (fr)
EP (2) EP2290200A1 (fr)
CN (1) CN102472117A (fr)
RU (1) RU2542725C2 (fr)
WO (1) WO2011006728A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130173178A1 (en) * 2011-12-30 2013-07-04 Spirax-Sarco Limited Apparatus and Method for Monitoring a Steam Plant
US20130205781A1 (en) * 2010-06-28 2013-08-15 Pramurtta Shourjya Majumdar Steam Turbine and Steam Generator System and Operation Thereof
US20140366537A1 (en) * 2013-06-17 2014-12-18 Alstom Technology Ltd Steam power plant turbine and control method for operating at low load
US20150323179A1 (en) * 2014-05-08 2015-11-12 Alstom Technology Ltd Oxy boiler power plant oxygen feed system heat integration
US20150330628A1 (en) * 2014-05-08 2015-11-19 Alstom Technology Ltd Oxy boiler power plant with a heat integrated air separation unit
US9915424B2 (en) 2014-05-08 2018-03-13 General Electric Technology Gmbh Coal fired Oxy plant with Flue Gas Heat Recovery
US10006634B2 (en) 2014-05-08 2018-06-26 General Electric Technology Gmbh Coal fired oxy plant with air separation unit including parallel coupled heat exchanger

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104100309B (zh) * 2014-07-11 2016-03-23 中国电力工程顾问集团华东电力设计院有限公司 一次再热汽轮机高温抽汽冷却系统
CN104061027B (zh) * 2014-07-11 2016-01-06 中国电力工程顾问集团华东电力设计院有限公司 二次再热汽轮机热力系统的高温抽汽冷却系统
US9637575B2 (en) * 2014-12-31 2017-05-02 W. R. Grace & Co. -Conn. Catalyst system, olefin polymerization catalyst components comprising at least an internal electron donor compound, and methods of making and using the same

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2991620A (en) * 1956-06-11 1961-07-11 Nekolny Jaroslav Desuperheater arrangements for steam turbines
US4328675A (en) * 1978-10-13 1982-05-11 Linde Aktiengesellschaft Method of recovering power in a counterpressure-steam system
US20060248890A1 (en) * 2005-02-07 2006-11-09 Mitsubishi Heavy Industries, Ltd. Carbon dioxide recovery and power generation
WO2008119784A2 (fr) * 2007-03-30 2008-10-09 Siemens Aktiengesellschaft Ensemble muni d'une turbine à vapeur et d'un condensateur
US20090158737A1 (en) * 2005-12-15 2009-06-25 Ineos Usa Llc Power Recovery Process

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CH399493A (de) * 1960-02-05 1965-09-30 Siemens Ag Dampfkraftanlage
SU920241A1 (ru) * 1979-02-23 1982-04-15 Институт ядерной энергетики АН БССР Способ работы замкнутой энергетической установки
GB2069615B (en) * 1980-02-13 1983-04-20 Linde Ag Method of producing power
US4352270A (en) * 1980-06-26 1982-10-05 Westinghouse Electric Corp. Method and apparatus for providing process steam of desired temperature and pressure
SU1477907A1 (ru) * 1986-04-15 1989-05-07 Одесский Политехнический Институт Способ работы энергетической установки с рабочим телом на смеси веществ химически активного и химически инертного по отношению к конструкционным материалам

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2991620A (en) * 1956-06-11 1961-07-11 Nekolny Jaroslav Desuperheater arrangements for steam turbines
US4328675A (en) * 1978-10-13 1982-05-11 Linde Aktiengesellschaft Method of recovering power in a counterpressure-steam system
US20060248890A1 (en) * 2005-02-07 2006-11-09 Mitsubishi Heavy Industries, Ltd. Carbon dioxide recovery and power generation
US20090158737A1 (en) * 2005-12-15 2009-06-25 Ineos Usa Llc Power Recovery Process
WO2008119784A2 (fr) * 2007-03-30 2008-10-09 Siemens Aktiengesellschaft Ensemble muni d'une turbine à vapeur et d'un condensateur

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130205781A1 (en) * 2010-06-28 2013-08-15 Pramurtta Shourjya Majumdar Steam Turbine and Steam Generator System and Operation Thereof
US20130173178A1 (en) * 2011-12-30 2013-07-04 Spirax-Sarco Limited Apparatus and Method for Monitoring a Steam Plant
US20140366537A1 (en) * 2013-06-17 2014-12-18 Alstom Technology Ltd Steam power plant turbine and control method for operating at low load
US9617874B2 (en) * 2013-06-17 2017-04-11 General Electric Technology Gmbh Steam power plant turbine and control method for operating at low load
US20150323179A1 (en) * 2014-05-08 2015-11-12 Alstom Technology Ltd Oxy boiler power plant oxygen feed system heat integration
US20150330628A1 (en) * 2014-05-08 2015-11-19 Alstom Technology Ltd Oxy boiler power plant with a heat integrated air separation unit
US9915424B2 (en) 2014-05-08 2018-03-13 General Electric Technology Gmbh Coal fired Oxy plant with Flue Gas Heat Recovery
US10001279B2 (en) * 2014-05-08 2018-06-19 General Electric Technology Gmbh Oxy boiler power plant with a heat integrated air separation unit
US10006634B2 (en) 2014-05-08 2018-06-26 General Electric Technology Gmbh Coal fired oxy plant with air separation unit including parallel coupled heat exchanger
US10203112B2 (en) * 2014-05-08 2019-02-12 General Electric Technology Gmbh Oxy boiler power plant oxygen feed system heat integration

Also Published As

Publication number Publication date
RU2012105280A (ru) 2013-08-20
EP2290200A1 (fr) 2011-03-02
RU2542725C2 (ru) 2015-02-27
EP2454453A1 (fr) 2012-05-23
CN102472117A (zh) 2012-05-23
EP2454453B1 (fr) 2015-08-19
WO2011006728A1 (fr) 2011-01-20

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AS Assignment

Owner name: SIEMENS AKTIENGESELLSCHAFT, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:FRUEH, TILMAN;GRAEBER, CARSTEN;ROST, MIKE;REEL/FRAME:027508/0174

Effective date: 20111205

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION