EP2868873A1 - Centrale thermique avec utilisation de la chaleur rejetée d'un générateur - Google Patents

Centrale thermique avec utilisation de la chaleur rejetée d'un générateur Download PDF

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Publication number
EP2868873A1
EP2868873A1 EP20130191596 EP13191596A EP2868873A1 EP 2868873 A1 EP2868873 A1 EP 2868873A1 EP 20130191596 EP20130191596 EP 20130191596 EP 13191596 A EP13191596 A EP 13191596A EP 2868873 A1 EP2868873 A1 EP 2868873A1
Authority
EP
European Patent Office
Prior art keywords
thermal power
power plant
waste heat
generator
heat
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Withdrawn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
EP20130191596
Other languages
German (de)
English (en)
Inventor
Esteban Grau Sorarrain
Christian Jäkel
Mario Koebe
Matthias Kowalski
Christoph Lehmann
Andrey Mashkin
Olga Plotnikova
Carolin Schild
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 EP20130191596 priority Critical patent/EP2868873A1/fr
Priority to PCT/EP2014/069867 priority patent/WO2015067397A1/fr
Priority to US15/033,231 priority patent/US20160273410A1/en
Priority to JP2016550962A priority patent/JP2017504761A/ja
Priority to CN201480060627.4A priority patent/CN105705735A/zh
Priority to EP14766998.0A priority patent/EP3042050A1/fr
Publication of EP2868873A1 publication Critical patent/EP2868873A1/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Withdrawn legal-status Critical Current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
    • F01K27/00—Plants for converting heat or fluid energy into mechanical energy, not otherwise provided for
    • F01K27/02—Plants modified to use their waste heat, other than that of exhaust, e.g. engine-friction heat
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L9/00—Treating solid fuels to improve their combustion
    • C10L9/08—Treating solid fuels to improve their combustion by heat treatments, e.g. calcining
    • 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
    • F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • F01D15/10—Adaptations for driving, or combinations with, electric generators
    • 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
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
    • C10L2290/06—Heat exchange, direct or indirect
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
    • C10L2290/08—Drying or removing water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2220/00—Application
    • F05D2220/30—Application in turbines
    • F05D2220/31—Application in turbines in steam turbines

Definitions

  • the invention relates to a thermal power plant in which the waste heat of a generator can be used.
  • thermal power plants usually referred to as thermal power plants or steam power plants
  • steam power plants great efforts are made to convert the combustion of fossil fuels or nuclear fission heat released with the highest possible degree of efficiency in mechanical and finally in electrical energy.
  • An essential approach is not to completely relax all the steam, but partly to take before and above all to use for preheating the feed water.
  • the released heat is also used elsewhere for heating purposes or as process heat. To enable this use of heat, a somewhat reduced generation of electrical energy is also accepted.
  • the object of the invention is to achieve a further improvement of the efficiency or the degree of energy utilization, ie an increased production of electrical energy or an increased use of released heat for other purposes.
  • a thermal power plant is to be provided with a generator which has a cooling for the generator, wherein the waste heat of the generator released during cooling can be usefully employed for the operation of the thermal power plant. It is usually necessary to provide cooling for the generator anyway. So far, the heat is usually released unused to the environment. It is known that the waste heat can be used for heating purposes. It has now been recognized that the heat can also be used profitably for the operation of the thermal power plant. Thus, less vapor must be removed before complete relaxation, so that this steam is available for the production of electrical energy or for other purposes.
  • a coolant circuit for cooling the generator, wherein the coolant circuit has a heat exchanger, with the waste heat absorbed by the coolant during cooling of the generator for heating substances to be heated.
  • the coolant may be different fluids. In this case, gaseous fluids such as air or hydrogen come into consideration, but there are also conceivable liquid fluids such as water.
  • the waste heat for fuel drying is usable.
  • the fuel used Since the energy required for drying would otherwise be required during combustion, no energy is lost. Since the energy required for drying, more precisely, the required heat, is required at a relatively low temperature, it is also thermodynamically more favorable to first dry the fuel with heat of lower temperature than to accept a reduction in the heat present at the combustion temperature. For these reasons, fuel drying is common in the art.
  • steam has been tapped from a turbine prior to its complete relaxation. With the invention less vapor must be removed before complete relaxation, so that this steam is available for the production of electrical energy or for other purposes.
  • the waste heat for feedwater pre-heating is available.
  • the feedwater pre-heating with steam which is diverted from the turbine before its complete relaxation, is a common measure to increase the efficiency.
  • waste heat from the generator less steam must be removed before complete relaxation, so that this steam is available for the production of electrical energy or for other purposes.
  • the feed water coming from the condenser can be heated prior to another heating with the waste heat of the generator.
  • the first targeted heating of the feedwater after the exit of the feedwater from the condenser is due to the waste heat of the generator.
  • a slight warming can take place, for example by ambient heat already before heating by the waste heat of the generator.
  • prior to heating by the waste heat no other purposeful heating should take place. This is to prevent that the temperature of the feedwater is already so high that the temperature of the waste heat is no longer sufficient for heating.
  • temperature differences are always required to transfer the heat. So a temperature difference is required to transfer the heat from the generator to the coolant and in turn to transfer a temperature difference to heat from the coolant to the feed water - or to other substances to be heated.
  • the waste heat is heat that occurs at a comparatively low temperature, so that normally only steam can be replaced, which would be taken at relatively low pressure and correspondingly low temperature before complete relaxation. This saves steam by using the waste heat of the generator, which can only make a manageable contribution to mechanical work and electrical energy. Nevertheless, the invention makes a relevant contribution to increase the efficiency of a thermal power plant.
  • the feed water coming from the condenser can be led directly into a heat exchanger for the transfer of heat from the coolant to the feed water.
  • direct guidance is meant that apart from piping and optionally pumps and valves, there are no essential components.
  • the waste heat for combustion air preheating can be used.
  • the air required for combustion ie the air which carries the oxygen necessary for combustion, is sometimes preheated. It is thermodynamically more favorable to first preheat the air with heat at a lower temperature than to accept a reduction in the heat present at the combustion temperature. Since the combustion air is supplied with ambient temperature of the thermal power plant, ie with a comparatively low temperature, the preheating with the waste heat of the generator is a useful use of waste heat. For practical implementation is usually a heat exchanger provided.
  • the invention also relates to an associated method.
  • the figure shows a very simplified representation of a thermal power plant.
  • a boiler 1 the feed water is heated and evaporated.
  • the steam is fed into a high-pressure turbine 2.
  • a line 3 leads to a medium-pressure turbine 4.
  • a reheating of the steam takes place, as indicated by the serrations in the line 3.
  • the medium-pressure turbine 4 the steam is passed through a line 5 in a low-pressure turbine 6.
  • the steam which already has a certain amount of moisture, is passed through a line 7 into a condenser 8.
  • the high-pressure turbine 2, the medium-pressure turbine 4 and the low-pressure turbine 6 lie on a common shaft 9, which drives a generator 10, in which the mechanical energy is converted into electrical energy.
  • the coolant circuit 11 leads to a heat exchanger 12 from the condensation of steam in the condenser 8 recovered feedwater is also performed in a feedwater line 13 through the heat exchanger 12.
  • the discharged from the coolant circuit 11 from the generator 10 waste heat is transferred to the feed water.
  • Fig. 1 are not shown in the further course of the feedwater pipe 13 arranged preheating stages in which the feed water is preheated with steam.
  • the steam is this - also not shown - taken from the low-pressure turbine 6 before complete relaxation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
EP20130191596 2013-11-05 2013-11-05 Centrale thermique avec utilisation de la chaleur rejetée d'un générateur Withdrawn EP2868873A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP20130191596 EP2868873A1 (fr) 2013-11-05 2013-11-05 Centrale thermique avec utilisation de la chaleur rejetée d'un générateur
PCT/EP2014/069867 WO2015067397A1 (fr) 2013-11-05 2014-09-18 Centrale thermique exploitant la chaleur perdue d'un générateur
US15/033,231 US20160273410A1 (en) 2013-11-05 2014-09-18 Thermal power plant with use of the waste heat from a generator
JP2016550962A JP2017504761A (ja) 2013-11-05 2014-09-18 発電機からの廃熱を利用した熱発電プラント
CN201480060627.4A CN105705735A (zh) 2013-11-05 2014-09-18 利用发电机的废热的热力发电厂
EP14766998.0A EP3042050A1 (fr) 2013-11-05 2014-09-18 Centrale thermique exploitant la chaleur perdue d'un générateur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20130191596 EP2868873A1 (fr) 2013-11-05 2013-11-05 Centrale thermique avec utilisation de la chaleur rejetée d'un générateur

Publications (1)

Publication Number Publication Date
EP2868873A1 true EP2868873A1 (fr) 2015-05-06

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Family Applications (2)

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EP20130191596 Withdrawn EP2868873A1 (fr) 2013-11-05 2013-11-05 Centrale thermique avec utilisation de la chaleur rejetée d'un générateur
EP14766998.0A Withdrawn EP3042050A1 (fr) 2013-11-05 2014-09-18 Centrale thermique exploitant la chaleur perdue d'un générateur

Family Applications After (1)

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EP14766998.0A Withdrawn EP3042050A1 (fr) 2013-11-05 2014-09-18 Centrale thermique exploitant la chaleur perdue d'un générateur

Country Status (5)

Country Link
US (1) US20160273410A1 (fr)
EP (2) EP2868873A1 (fr)
JP (1) JP2017504761A (fr)
CN (1) CN105705735A (fr)
WO (1) WO2015067397A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019044678A (ja) 2017-08-31 2019-03-22 三菱重工業株式会社 蒸気タービンシステム及びコンバインドサイクルプラント
JP7059347B2 (ja) * 2020-12-24 2022-04-25 三菱重工業株式会社 排熱回収プラント、及びコンバインドサイクルプラント

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19753264C1 (de) * 1997-12-01 1999-06-17 Siemens Ag Gasturbinenanlage und Verfahren zum Betreiben einer Gasturbinenanlage sowie Gas- und Dampfturbinenanlage
WO2007132312A2 (fr) * 2006-05-17 2007-11-22 Dariusz Budzinski Processus visant augmenter l'efficacité d'utilisation et à réduire en même temps les émissionsutilisation et à réduire en même temps les émissions de gaz de combustion dans des centrales thermiques et électriques et système de mise en oeuvre de ce procédé
DE202012006055U1 (de) * 2012-06-25 2012-08-01 Monika Semmler Vorrichtung zum Erzeugen von elektrischer Energie mittels eines Organic-Rankine-Kreislaufs in Verbindung mit einem Turbinengenerator

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55142916A (en) * 1979-04-25 1980-11-07 Toshiba Corp Recovery device of waste heat from electrical equipment
DE4103362C1 (fr) * 1991-02-05 1992-04-23 Voest Alpine Ind Anlagen
US20060185366A1 (en) * 2005-02-22 2006-08-24 Siemens Aktiengesellschaft Thermal power plant
JP5030750B2 (ja) * 2007-11-30 2012-09-19 三菱重工業株式会社 石炭ガス化複合発電設備
CN101699207B (zh) * 2009-11-19 2011-05-18 河北理工大学 提高烧结余热发电系统热力循环质量的方法
CN103277155B (zh) * 2013-05-20 2016-01-13 华北电力大学 褐煤预干燥-预热空气-余热利用复合燃煤发电系统

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19753264C1 (de) * 1997-12-01 1999-06-17 Siemens Ag Gasturbinenanlage und Verfahren zum Betreiben einer Gasturbinenanlage sowie Gas- und Dampfturbinenanlage
WO2007132312A2 (fr) * 2006-05-17 2007-11-22 Dariusz Budzinski Processus visant augmenter l'efficacité d'utilisation et à réduire en même temps les émissionsutilisation et à réduire en même temps les émissions de gaz de combustion dans des centrales thermiques et électriques et système de mise en oeuvre de ce procédé
DE202012006055U1 (de) * 2012-06-25 2012-08-01 Monika Semmler Vorrichtung zum Erzeugen von elektrischer Energie mittels eines Organic-Rankine-Kreislaufs in Verbindung mit einem Turbinengenerator

Also Published As

Publication number Publication date
EP3042050A1 (fr) 2016-07-13
CN105705735A (zh) 2016-06-22
WO2015067397A1 (fr) 2015-05-14
JP2017504761A (ja) 2017-02-09
US20160273410A1 (en) 2016-09-22

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