EP1662096A1 - Procédé de fonctionnement d'une centrale à vapeur, notamment d'une centrale à vapeur pour la production de l'éléctricité au moins et la centrale à vapeur correspondante - Google Patents

Procédé de fonctionnement d'une centrale à vapeur, notamment d'une centrale à vapeur pour la production de l'éléctricité au moins et la centrale à vapeur correspondante Download PDF

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Publication number
EP1662096A1
EP1662096A1 EP04028295A EP04028295A EP1662096A1 EP 1662096 A1 EP1662096 A1 EP 1662096A1 EP 04028295 A EP04028295 A EP 04028295A EP 04028295 A EP04028295 A EP 04028295A EP 1662096 A1 EP1662096 A1 EP 1662096A1
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EP
European Patent Office
Prior art keywords
water
power plant
steam
steam power
pressure stage
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Withdrawn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
EP04028295A
Other languages
German (de)
English (en)
Inventor
Michael Dr. Schöttler
Anja Wallmann
Rainer Wulff
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 EP04028295A priority Critical patent/EP1662096A1/fr
Priority to US11/791,798 priority patent/US7886538B2/en
Priority to EP05803061A priority patent/EP1819909A1/fr
Priority to PCT/EP2005/056008 priority patent/WO2006058845A1/fr
Priority to KR1020077015077A priority patent/KR101259515B1/ko
Priority to CN2005800401951A priority patent/CN101065559B/zh
Priority to JP2007541951A priority patent/JP4901749B2/ja
Publication of EP1662096A1 publication Critical patent/EP1662096A1/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Withdrawn legal-status Critical Current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
    • F01K13/00—General layout or general methods of operation of complete plants
    • 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
    • F01K21/00—Steam engine plants not otherwise provided for
    • F01K21/06—Treating live steam, other than thermodynamically, e.g. for fighting deposits in engine
    • 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
    • F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
    • F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
    • F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
    • F01K23/10—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle
    • 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
    • F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
    • F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
    • F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
    • F01K23/10—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle
    • F01K23/106—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle with water evaporated or preheated at different pressures in exhaust boiler

Definitions

  • the present invention relates to a method for operating a steam power plant and in particular a method for operating a power plant for generating at least electrical energy with a steam power plant, the steam power plant having a water cycle with at least one pressure stage and water if necessary from the water cycle or from the Pressure levels, can be drained.
  • the power plant has at least one electric generator which can be driven by the steam power plant.
  • the invention also relates to a steam power plant for generating at least electrical energy, at which the method according to the invention can be carried out.
  • Such a steam power plant usually includes one or more circulating steam generators with steam drums (pressure drums) with associated heating surfaces. With the circulation steam generators, in particular at different pressure levels, steam is generated, which can be fed to a steam turbine or the respective pressure stage of the steam turbine.
  • the steam power plant may also have one or more so-called.
  • Continuous steam generator which are also referred to as Benson boiler, but which are usually involved in the high-pressure stage.
  • a disadvantage of the prior art is in particular that the dewatered deionized produced at high cost is not returned to the water cycle, but discarded in the form of waste water into the environment. Therefore, in conventional steam power plants, the costs incurred for deionized, especially in frequent take-off and start-up operations, significantly increased. In addition, the environment is significantly burdened by the high discharge of wastewater.
  • the replenished deionate has high levels of oxygen and carbon dioxide which require degassing of the deionate, thus prolonging the startup time of the steam power plant.
  • the object of the invention is to eliminate the disadvantages of the prior art. In detail, it is therefore the task the invention significantly reduce the running costs of a steam power plant and a power plant for generating electrical energy with such a steam power plant, which arise from the deionized supply. Another object of the invention is to significantly reduce the pollution of the environment by wastewater and the consumption of water. It is also an object of the invention to shorten the startup time of the steam power plant with low resources.
  • the object is achieved by a method with the features of claim 1.
  • the object is achieved by a steam power plant with the features of claim 12.
  • the invention has the advantage over the prior art that the costs for the provision of deionized water, especially in the case of frequent take-off and start-up operations, are significantly reduced. With the help of the invention it is also possible to operate steam power plants in regions with severe lack of water. Furthermore, much water can be saved by the invention and the environment is less burdened with discharged wastewater. The start-up time of the steam power plant or the power plant is shortened. In particular, by the return of the substantially entire dehydrated water, this is achieved, wherein essentially means, for example, that about 99% of the dewatered amount of water is recycled.
  • the dewatered water is collected at least from the pressure stage with the highest pressure, stored and completely returned to the water cycle.
  • the largest part of the dehydrated water can be returned with little effort, since the water flowing in the highest pressure stage Amount of water makes up the largest part of the water volume of the entire water cycle.
  • the pressure level is lower than that of the highest pressure level, in a corresponding training while all pressure levels can be included. In this way, a greater part or the total amount of the dewatered water is collected, stored and returned to the water cycle, thus saving even more water.
  • the dewatered water is subjected to a liquid water vapor separation, wherein the separated steam can be supplied to the condenser of the steam power plant.
  • the separated clean steam can be easily cooled in the condenser and liquefied by this measure.
  • a special cooling measure on the stored water can thus largely be omitted.
  • a simple return of collected water is given in the water cycle.
  • the resulting during a shutdown dewatered water is always returned so far back to the water cycle that at the end of the shutdown, ie at a standstill, the dehydrated water, so the maximum dehydrated amount of water is stored.
  • the dewatered amount of water is then fed back to the water cycle at the next startup.
  • At least a portion of the dewatered water is returned to the water cycle via a water treatment plant.
  • at least some of the water exiting from the condenser can also be routed through the water treatment plant, whereby it is also possible the two partial streams must be mixed before entering the water treatment plant.
  • a first embodiment of a steam power plant 2 is shown.
  • the steam power plant 2 is part of a power plant 1, which may be formed, for example, as a combined gas and steam turbine power plant.
  • the steam power plant 2 has a steam turbine 4 with three different pressure ranges in the exemplary embodiment.
  • the steam power plant 2 in the exemplary embodiment a water cycle with essentially the steam turbine 4, a condenser 6, a condensate pump 7 and three pressure stages 8, 9, 10, which are each associated with the individual respective pressure ranges of the steam turbine 4.
  • the water cycle also includes a feedwater pump, not shown.
  • the pressure stages 8, 9, 10 are connected to the pressure ranges of the steam turbine 4 in each case by steam lines 11.
  • the pressure stages 8, 9, 10 are divided in the embodiment in the form of a high-pressure stage first pressure stage 8, formed as a medium pressure stage second pressure stage 9 and designed as a low pressure stage third pressure stage 10.
  • the first pressure stage 8 of the water cycle has a continuous steam generator 12 with a continuous heating surface 16 and a separator bottle 15.
  • the second pressure stage 9 has a first circulation steam generator 13 with a first pressure drum 17 and a first circulating heating surface 18 designed as a circulation evaporator.
  • the third pressure stage 10 constructed similar to the second pressure stage 9 has a second circulation steam generator 14 with a second pressure drum 19 and a second circulation heating surface 20 designed as a circulation evaporator.
  • the heating surfaces 16, 18, 20 are arranged in a boiler 5, which may be formed, for example, as in the embodiment as a horizontal waste heat boiler and is fed by the exhaust gases of a gas turbine, not shown.
  • the steam generators 12, 13, 14 in the exemplary embodiment in each case a superheater 21 is connected downstream.
  • the output of the respective superheater 21 is connected via the respective steam line 11 with its associated pressure range of the steam turbine 4 in connection.
  • Each steam line 11 is part of each pressure stage 8, 9, 10th
  • deionized water so-called deionized water
  • deionized water is fed to the steam generators 12, 13, 14 via lines which are not shown for the sake of simplicity. Since in the embodiment shown different types of steam generators 12, 13, 14 are used, which have different requirements on the nature of the supplied deionized, in particular the ph value, the deionate is shortly before its entry into the respective steam generator 12, 13, 14 prepared accordingly by a corresponding device, not shown.
  • the evaporation of the supplied water takes place.
  • the continuous steam generator 12 is usually also still overheating. The vaporized water is overheated in the subsequent superheater 21 and via the steam lines 11 fed to the respective pressure range of the steam turbine 4.
  • the emerging from the high pressure region of the steam turbine 4 in the form of steam water is conventionally supplied to the next lower pressure stage via lines, which are not shown for the sake of clarity.
  • water issuing from the high-pressure region of the steam turbine 4 in the form of steam is thus supplied to the second pressure stage 9.
  • From the medium pressure range of the steam turbine 4 in the form of steam escaping water is the third pressure stage 10, and thus at the end and the lowest pressure range of the steam turbine 10 is supplied.
  • the water emerging from the low-pressure region of the steam turbine 4 is supplied to the condenser 6 for cooling and liquefaction via an exhaust steam line 41.
  • the exhaust steam line 41 closes the water cycle of the steam power plant 2 between the steam turbine 4 and the condenser 6.
  • the water emerging from the condensate pump 7 is supplied via the feedwater pump, not shown, mainly the first pressure stage 8.
  • 9 10 amount of water flowing in the first pressure stage 8 amount of water in the embodiment in operation has a share of about 75%, as in her compared to the other pressure levels 9, 10 significantly more power is implemented ,
  • the energy supplied in the steam of the steam turbine 4 is converted into rotational energy in the steam turbine 4 and thus delivered to the connected electric generator 3.
  • water is dewatered intermittently or partially from the pressure stages 8, 9, 10.
  • the dewatered water is first by a collecting device 22, which in the embodiment by a first bundle of raw cables 23 and a second pipe bundle 24 is performed, collected.
  • a collecting device 22 which in the embodiment by a first bundle of raw cables 23 and a second pipe bundle 24 is performed, collected.
  • water is continuously drained from the pressure drums 17 and 19 in the nominal operation of the steam power plant 2.
  • This process is also referred to as desludging, as accumulate by the circulation operation in the pressure drums 17, 18 deposits that must be tillschlämmt. For example, about 0.5% to 1% of the throughput of water of the printing drum 17, 18 is constantly dehydrated.
  • the water drained and collected in the exemplary embodiment from the pressure stages 8, 9, 10 is then stored.
  • a plurality of storage containers 25, 26, 27 and 28 are provided, which may be more or less filled depending on the operating state of the power plant 1. More specifically, in the embodiment, the dehydrated water from the pressure drums 17, 19, the dehydrated water from the separator bottle 15, and the dehydrated water from the superheaters 21 are first supplied to the first storage tank 25 and stored there.
  • the first storage tank 25 is designed in size so that it can initially accumulate the very high supply of dehydrated water when starting or stopping the steam power plant 2 for some time and so can buffer.
  • the first storage tank 25 also acts as a first separator 32, since the hot, dehydrated water evaporates in the first storage tank 25, liquid water is separated from steam, wherein the in itself impurities of impurities via a first return line 29 to the inlet of the condenser 6 is supplied and the liquid water is initially stored in the storage tank 25. If necessary, liquid water stored in the first storage tank 25 is pumped into a third storage tank 27 by means of a first pump 34. By a arranged after the output of the first pump 34 branch, the pumped amount of water can be partially or completely pumped through a first cooler 37 back into the first storage tank 25 by a corresponding position of a valve, not shown. As a result, additional cooling of the water stored in the first storage tank 25 is possible.
  • the water drained from the steam lines 11 of the pressure stages 8, 9, 10 is dewatered through the second pipe bundle 24 and stored in the second storage tank 26.
  • a cooling circuit consisting of a second pump 35 and a second cooler 38 is also associated with the second storage tank 26.
  • the second storage tank 26 has a second separating device 33, which is provided as in the first storage tank 25, wherein the water vapor, which is clean per se, can also be fed to the inlet of the condenser 6 via a second return line 30.
  • the liquid water stored in the second storage tank 26 can also be supplied to the third storage tank 27 via the second pump 35 if required.
  • the liquid water stored in the third storage tank 27 is supplied via a third cooler 39, a third pump 36 and a water treatment plant 40 to the inlet of the condensate pump 7 via a third return line 31.
  • the water treatment plant 40 is switched and arranged so that in it the entire liquid phase of the dewatered water is passed and treated before this liquid phase is returned to the water cycle of the steam power plant 2.
  • the entire water emerging from the third storage tank 27 is passed through the water treatment plant 40 and processed there.
  • the water treatment plant 40 is arranged in the secondary flow of the water cycle, wherein a partial flow of water emerging from a formed as a condensate receiver fourth storage tank 28 via the third pump 36 of the water treatment plant 40 can be fed.
  • the partial flow can be mixed with the liquid water coming from the third storage tank 27 before it reaches the water treatment plant 40.
  • the entire water emerging from the condenser 6 can be passed through the water treatment plant 40, wherein the water treatment plant 40 is then in the main stream of water coming out of the condenser 6.
  • the entire amount of dewatered water accumulating over a certain period of time is collected in the exemplary embodiment, stored to a certain extent and then released to the water cycle.
  • the water drained from all pressure stages 8, 9, 10 is collected, stored and returned.
  • the water from only one, preferably the highest pressure stage 8 dehydrated water can be collected in this way, stored and returned.
  • a continuous steam generator 12 is used.
  • Continuous steam generators 12 place increased demands on water quality, which can usually only be produced and secured by the water treatment plant 40.
  • other requirements for the water quality relate in particular to the pH value and the oxygen content. Since the water treatment plant 40 is anyway necessary because of the continuous steam generator 12, it is more advantageous to reduce the relatively small quantities of water drained from the circulating steam generators 13, 14 also via the water treatment plant 40 to the water cycle than to reject them.
  • the water treatment plant 40 may in particular have a mechanical cleaning and a cation / anion exchanger.
  • the Wasseraufbeltungsstrom 40 prepares the water supplied to him in particular with regard to its chemical properties.
  • the entire water cycle in particular the collecting device 22, the storage container 25, 26, 27, 28 and the return lines 29, 30, 31, are closed to the atmosphere to prevent uncontrolled air entry into the dewatered water.

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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)
  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)
EP04028295A 2004-11-30 2004-11-30 Procédé de fonctionnement d'une centrale à vapeur, notamment d'une centrale à vapeur pour la production de l'éléctricité au moins et la centrale à vapeur correspondante Withdrawn EP1662096A1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP04028295A EP1662096A1 (fr) 2004-11-30 2004-11-30 Procédé de fonctionnement d'une centrale à vapeur, notamment d'une centrale à vapeur pour la production de l'éléctricité au moins et la centrale à vapeur correspondante
US11/791,798 US7886538B2 (en) 2004-11-30 2005-11-16 Method for operating a steam power plant, particularly a steam power plant in a power plant for generating at least electrical energy, and corresponding steam power plant
EP05803061A EP1819909A1 (fr) 2004-11-30 2005-11-16 Procede permettant de faire fonctionner un groupe-vapeur, notamment un groupe-vapeur d'une centrale electrique destinee a la production au moins d'energie electrique, et groupe-vapeur correspondant
PCT/EP2005/056008 WO2006058845A1 (fr) 2004-11-30 2005-11-16 Procede permettant de faire fonctionner un groupe-vapeur, notamment un groupe-vapeur d'une centrale electrique destinee a la production au moins d'energie electrique, et groupe-vapeur correspondant
KR1020077015077A KR101259515B1 (ko) 2004-11-30 2005-11-16 증기 발전 장치, 특히 적어도 전기 에너지를 발생시키기위한 발전 설비의 증기 발전 장치 작동 방법 및 이에사용되는 증기 발전 장치
CN2005800401951A CN101065559B (zh) 2004-11-30 2005-11-16 蒸汽动力装置的运行方法和相应的蒸汽动力装置
JP2007541951A JP4901749B2 (ja) 2004-11-30 2005-11-16 蒸気原動設備、特に少なくとも電気エネルギを発生するための発電所の蒸気原動設備の運転方法とその蒸気原動設備

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04028295A EP1662096A1 (fr) 2004-11-30 2004-11-30 Procédé de fonctionnement d'une centrale à vapeur, notamment d'une centrale à vapeur pour la production de l'éléctricité au moins et la centrale à vapeur correspondante

Publications (1)

Publication Number Publication Date
EP1662096A1 true EP1662096A1 (fr) 2006-05-31

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Application Number Title Priority Date Filing Date
EP04028295A Withdrawn EP1662096A1 (fr) 2004-11-30 2004-11-30 Procédé de fonctionnement d'une centrale à vapeur, notamment d'une centrale à vapeur pour la production de l'éléctricité au moins et la centrale à vapeur correspondante
EP05803061A Withdrawn EP1819909A1 (fr) 2004-11-30 2005-11-16 Procede permettant de faire fonctionner un groupe-vapeur, notamment un groupe-vapeur d'une centrale electrique destinee a la production au moins d'energie electrique, et groupe-vapeur correspondant

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP05803061A Withdrawn EP1819909A1 (fr) 2004-11-30 2005-11-16 Procede permettant de faire fonctionner un groupe-vapeur, notamment un groupe-vapeur d'une centrale electrique destinee a la production au moins d'energie electrique, et groupe-vapeur correspondant

Country Status (6)

Country Link
US (1) US7886538B2 (fr)
EP (2) EP1662096A1 (fr)
JP (1) JP4901749B2 (fr)
KR (1) KR101259515B1 (fr)
CN (1) CN101065559B (fr)
WO (1) WO2006058845A1 (fr)

Cited By (2)

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WO2014048779A1 (fr) * 2012-09-28 2014-04-03 Siemens Aktiengesellschaft Procédé de récupération des eaux usées d'un groupe vapeur
DE102015206484A1 (de) * 2015-04-10 2016-10-13 Siemens Aktiengesellschaft Verfahren zum Aufbereiten eines flüssigen Mediums und Aufbereitungsanlage

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US8984892B2 (en) * 2009-03-31 2015-03-24 General Electric Company Combined cycle power plant including a heat recovery steam generator
US20100242430A1 (en) * 2009-03-31 2010-09-30 General Electric Company Combined cycle power plant including a heat recovery steam generator
DE102010054667B3 (de) * 2010-12-15 2012-02-16 Voith Patent Gmbh Frostsichere Dampfkreisprozessvorrichtung und Verfahren für deren Betrieb
KR101058430B1 (ko) * 2010-12-28 2011-08-24 임주혁 증기압력을 이용한 발전소용 급수 펌핑장치
CN104204664B (zh) 2012-01-17 2016-12-14 通用电器技术有限公司 用于连接单程水平蒸发器的区段的方法及设备
MX348680B (es) 2012-01-17 2017-06-23 General Electric Technology Gmbh Sistema de arranque para un evaporador horizontal directo.
KR101245088B1 (ko) * 2012-08-13 2013-03-18 서영호 전기로를 이용한 발전장치
EP2746656A1 (fr) 2012-12-19 2014-06-25 Siemens Aktiengesellschaft Drainage d'une centrale
EP3066310B1 (fr) 2014-03-05 2018-10-31 Siemens Aktiengesellschaft Design d'un réservoir de détente
DE102014217280A1 (de) * 2014-08-29 2016-03-03 Siemens Aktiengesellschaft Verfahren und Anordnung einer Dampfturbinenanlage in Kombination mit einer thermischen Wasseraufbereitung
CN107208880A (zh) * 2015-01-23 2017-09-26 西门子公司 发电设施中的原水预热
KR101967024B1 (ko) 2016-06-15 2019-08-13 두산중공업 주식회사 직접 연소 타입의 초임계 이산화탄소 발전 시스템
KR102043890B1 (ko) 2016-06-15 2019-11-12 두산중공업 주식회사 직접 연소 타입의 초임계 이산화탄소 발전 시스템
CN106895388A (zh) * 2016-12-30 2017-06-27 芜湖顺景自动化设备有限公司 安全节能的智能光速蒸汽机设备

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CN101065559B (zh) 2011-07-13
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KR20070089837A (ko) 2007-09-03
US7886538B2 (en) 2011-02-15
WO2006058845A1 (fr) 2006-06-08
KR101259515B1 (ko) 2013-05-06
EP1819909A1 (fr) 2007-08-22
US20080104959A1 (en) 2008-05-08
CN101065559A (zh) 2007-10-31

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