EP2746656A1 - Drainage d'une centrale - Google Patents
Drainage d'une centrale Download PDFInfo
- Publication number
- EP2746656A1 EP2746656A1 EP12198121.1A EP12198121A EP2746656A1 EP 2746656 A1 EP2746656 A1 EP 2746656A1 EP 12198121 A EP12198121 A EP 12198121A EP 2746656 A1 EP2746656 A1 EP 2746656A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- steam
- water
- power plant
- pressure vessel
- atmospheric pressure
- 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- Withdrawn
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/48—Devices for removing water, salt, or sludge from boilers; Arrangements of cleaning apparatus in boilers; Combinations thereof with boilers
- F22B37/486—Devices for removing water, salt, or sludge from boilers
-
- 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
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/48—Devices for removing water, salt, or sludge from boilers; Arrangements of cleaning apparatus in boilers; Combinations thereof with boilers
- F22B37/50—Devices for removing water, salt, or sludge from boilers; Arrangements of cleaning apparatus in boilers; Combinations thereof with boilers for draining or expelling water
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G9/00—Cleaning by flushing or washing, e.g. with chemical solvents
Definitions
- the present invention relates to a power plant, in particular a coupled gas and steam power plant, which has a number of drainage pipes for dewatering a water-steam cycle, and a method for operating such a power plant.
- Steam-powered power plants in particular coupled gas and steam power plants, have a water-steam cycle, which can sometimes be designed as one or more circulating steam generator with steam drums and the associated heating surfaces.
- Such circulation steam generators are usually subdivided into a high-pressure stage, a medium-pressure stage and a low-pressure stage, depending on their working pressure regime.
- steam hereinafter referred to simply as steam
- the steam generator can also be designed as a forced flow steam generator (Benson boiler, Sulzer boiler, etc.).
- such circulation steam generators are usually provided only in the high-pressure stage of the water-steam cycle, but can in principle also be provided for the lower pressure stages.
- condensate water collects in the pipes of the water-steam cycle, which precludes an efficient use of the water-steam cycle.
- condensation water is formed, in particular due to time-varying operating conditions in the water-steam cycle.
- Condensation water falls so for example when you shut down the power plants in the water-steam cycle, since at decreasing operating temperatures, the vapor contained in the water-steam cycle condenses increasingly condensed and the resulting condensed water also accumulates in parts of the system, for a longer Contact with liquid water are not provided.
- when powering down a power plant it is necessary to remove more water from the water-steam cycle in order to avoid unwanted condensation of water in unscheduled parts of the plant.
- less water is refilled in the water-steam circuit when driving down to keep at the end of the Abfahrreaes relevant plant components largely free of condensed water.
- the technical solution to be proposed is intended to enable an energetically advantageous use of the energy extracted by the discharge of dehydrations from the water-steam cycle. In other words, it should be made with respect to the overall energy balance of the power plant operation improved drainage. Moreover, it is desirable to make available again the energy dissipated from the water-steam cycle and the drainages for the power plant and in particular for the water-steam cycle.
- a power plant in particular a coupled gas and steam power plant, comprising a number of first drainage pipes, which are fluidly connected upstream with a water-steam cycle, and which are fluidly connected downstream with a pressure vessel , Wherein further at least one steam leading supply line is fluidly connected to the pressure vessel over which steam can be re-supplied to the water-steam cycle.
- the idea of the invention teaches the dehydration of the water-steam cycle by means of a number of first drainage lines, which are fluidly connected upstream of the water-steam cycle upstream.
- the first drains are introduced into a pressure vessel in which a relaxation can be set to a relatively lower pressure level compared to the pressure level of the water-steam cycle.
- the pressure vessel further has a pressure level which is above the ambient pressure level. In this respect, there is an overpressure level in it.
- the relaxation on the one hand, there is a reduction in the temperature level of the introduced dehydration and, preferably, at least a partial evaporation of the liquid dehydration.
- the steam present in the overpressure container which furthermore has usable thermal energy, is again supplied to the water-steam cycle for further use via the supply line which is fluidly connected to the overpressure container.
- This is particularly unproblematic, since this steam contains no impurities and thus the water-steam cycle can be fed back in "purified" form.
- the impurities remain largely or even substantially completely in the liquid phase, ie in the liquid water.
- thermal energy contained in the recirculated steam can again be available for power generation in the water-steam cycle of the power plant. Furthermore, this back the water-steam cycle recycled steam saves the use of additional make-up water, which in turn would be reprocessed before it could be fed to the water-steam cycle.
- a power plant with the present invention can thus be operated both economically and environmentally friendly and thus with higher efficiency.
- the concept of steam in the sense of vaporous water should be understood, as it occurs, for example, in the water-steam cycle.
- the quality of the water for example, due to an alternating content of various impurities, should have no influence on the conceptual meaning.
- the term of the water should include wastewater as well as in the water-steam cycle remaining useful water or condensation water.
- the steam discharged from the water-steam cycle as well as to the useful steam remaining in the water-steam cycle.
- the concept of water or steam can also be equated with the concept of drainage.
- the number of first drainage pipes is "one", ie according to the invention the power plant only comprises one drainage pipe.
- the execution of the pressure vessel is due to its pressure level compared to the pressure level of the water-steam cycle as well as compared to the pressure level of the environment as a pressure relief tank.
- the number of first drainage lines upstream with the water-steam cycle in the high-pressure and / or medium-pressure stage, in particular in the steam drum of the high-pressure and / or steam drum of the medium-pressure stage are interconnected.
- a fluidic interconnection "in the area" means in local proximity, wherein a fluidic interaction is brought about.
- the interconnection can also take place with a forced-circulation steam generator of the high-pressure and / or a forced-circulation steam generator of the medium-pressure stage.
- the number of first drainage lines upstream can also be connected to the water-steam circuit in the region of the low-pressure stage, in particular in the region of the steam drum of the low-pressure stage.
- the interconnection can also be done with a forced flow steam generator of the low pressure stage.
- the feed line leading at least one steam can supply steam to the water-steam circuit in the region of the low-pressure stage, in particular in the region of the steam drum of the low-pressure stage.
- the term "in the field" means in the local area, as stated above.
- the connection is made, in particular, with the low-pressure stage, in particular the steam drum of the low-pressure stage. Due to the prevailing in the low pressure stage relatively lower pressure levels, a transfer of steam from the pressure vessel in the water-steam cycle is energetically particularly favorable.
- the pressure level of the vapor in the pressure vessel is not substantially below the pressure level of the low pressure stage or even at the same pressure level or above.
- the low-pressure stage is suitable for printing, and thus energy technology for returning the discharged from the pressure vessel vapor particularly.
- the power plant also has an atmospheric pressure vessel, which allows a vapor release to substantially atmospheric pressure, and which is line connected to the pressure vessel so that steam from the pressure vessel can be passed into the atmospheric pressure vessel.
- the atmospheric pressure vessel and the pressure vessel are thus ready for the accumulation of drainages.
- the drains are passed in vapor phase from the pressure vessel into the atmospheric pressure vessel, wherein the pressure vessel transferred to a correspondingly lower pressure level can be.
- the atmospheric pressure vessel serves on the one hand to accumulate dehydration and at the same time also to regulate the pressure of the pressure in the pressure vessel.
- the atmospheric pressure container allows a suitable discharge of the drainages, without the pressure vessel, such as during operation, must be subjected to printing changes.
- relaxation to substantially atmospheric pressure level should include a pressure level corresponding to the atmospheric pressure level with a pressure tolerance of up to 20%.
- adjusting means are included in the power plant, which are adapted to adjust the amount of steam which can be passed from the pressure vessel into the atmospheric pressure vessel.
- the adjusting means between the pressure vessel and atmospheric pressure vessel is connected by line technology. Accordingly, the actuating means can dissipate the fluid connection between the pressure vessel and the dewatering tank when discharging the condensate drainages located in the atmospheric pressure vessel, so that removal from the atmospheric pressure vessel can be carried out without further influence with respect to the change of the pressure level in the pressure vessel.
- a number of second drainage lines is connected, which are connected upstream with the water-steam cycle, and which are connected downstream of the atmospheric pressure tank, and via which water and steam from the water Steam cycle can be fed to the atmospheric pressure vessel.
- water and steam from the water-steam cycle which is in particular at a relatively low pressure level, are transferred to the atmospheric pressure vessel. It may also prove advantageous, according to the embodiment, to transfer dehydrations from the water-steam cycle into the atmospheric pressure vessel if the dewatering collected therein is to be subjected to a different treatment form than the dehydration collected in the overpressure vessel.
- the number of second drainage lines prefferably be "one", i.
- the power plant comprises only a second drainage line.
- the number of second drainage lines is connected upstream to the water-steam cycle in the region of the low-pressure stage.
- the pressure level in the low-pressure stage is sometimes sufficiently low to transfer steam into the atmospheric pressure vessel, which can not be energetically used to return to the water-steam cycle.
- the liquid drains discharged from the low-pressure stage are preferably provided for rejection into the environment.
- Vapor drains discharged from the low-pressure stage can preferably also be supplied to the overpressure container, as already explained above.
- the atmospheric pressure container is connected to a recirculation line, which allows water from the atmospheric pressure container of a first Supplying cold source, and returned the so thermally treated water again in the atmospheric pressure vessel.
- the recirculation of water from the atmospheric pressure vessel allows the prevention of steam formation in the atmospheric pressure vessel.
- the overpressure container and / or the atmospheric pressure container is line-connected with a second cold source, which makes it possible to thermally treat water discharged from the overpressure container and / or the atmospheric pressure container.
- the drains discharged from the pressure vessel or the atmospheric pressure vessel can be cooled before further processing or separation and cleaning. This cooling is required for most purification processes known from the prior art. This cooling can in turn be done by means of water from the main capacitor of the power plant or water from an intermediate cooling to provide the second source of cold.
- the water thus treated can, according to the embodiment, again be provided for recycling into the water-steam cycle as a deionate.
- the overpressure container and / or the atmospheric pressure container is line-connected with a collecting container, in which water located in the overpressure container and / or in the atmospheric pressure container can be transferred for storage.
- the collecting container is capable in particular of the collection of condensed drainages and allows the merging of these before, for example, a further cleaning and treatment of these drains can take place.
- the merger is particularly useful and advantageous in terms of process technology and energy.
- the collecting container to be connected to a processing unit by line technology, wherein the processing unit can at least partially clean the water from impurities. After cleaning the present as drainage water by means of the treatment unit, the recycled water can be supplied to the water-steam circuit again as additional water (deionized).
- the collecting container and / or the treatment unit is connected in terms of line technology with the main capacitor of the power plant such that water can be supplied from this to the main capacitor.
- the main capacitor corresponds to the capacitor in which the steam is condensed, which is fed to the steam turbine or steam turbines for power generation.
- FIG. 1 shows a possible embodiment of the present inventive power plant 1, which has a water-steam cycle 2.
- the water-steam circuit 2 is comprised by the steam part of a gas and steam power plant 1.
- the water-steam cycle 2 a total of three different pressure levels 3, 5, 7, which serve for steam preparation.
- the steam processed in these pressure stages 3, 5, 7 is supplied to the power generation of a steam turbine 90 (or several steam turbines 90), which is fluidly connected to a main condenser 100 as a cold source.
- a steam turbine 90 or several steam turbines 90
- first drainage lines 11 are fluidically connected upstream with corresponding line sections of the respective pressure stage 3, 5, 7.
- first dewatering lines 11 upstream fluidly connected to a flange of a forced continuous steam generator of the high-pressure stage 3 not shown further upstream or the steam drum 6 of the medium-pressure stage.
- this latter first drainage line 11 is not provided for the discharge of drains from the low pressure stage 7 in the pressure vessel 20.
- a supply line 12 is fluidly connected to the pressure vessel 20, which is connected downstream of the steam drum 8 of the low-pressure stage 7. It is thus possible to supply the steam present in the overpressure container 20, the low-pressure stage 7 operated at a lower pressure level compared to the high-pressure stage 3 or intermediate-pressure stage 5, whereby the steam thus recirculated is again available for electrical power generation by means of the turbine 90 (steam turbine) can stand.
- the turbine 90 can likewise be designed as a number of individual turbines which are suitably connected to the respective pressure stages 3, 5, 7.
- the power plant 1 comprises an atmospheric pressure tank 30, which is also fluidly connected to the pressure vessel 20.
- an adjusting means 25 is also provided, which allows to interrupt the fluid connection or to adjust the fluid flow suitable.
- a discharge line 35 is provided, via which, in particular, vaporous water can be supplied from the atmospheric pressure container 30 to the environment / environment U.
- second drainage lines 13 are also provided, which allow a transfer of incurred in the low pressure stage 7 drainages in the atmospheric pressure vessel 30.
- a first cold source 50 as well as a second cold source 60 are provided.
- the power plant 1 provides a recirculation line 40, which drainages can be taken from the atmospheric pressure tank 30 to supply them to the first cooling source 50. Thereafter, the so thermally conditioned dehydrations are completely or partially recycled to the atmospheric pressure vessel 30, but at a lower temperature level. This temperature treatment allows the reduction of undesirable steam formation in the atmospheric pressure tank 30, because the steam is condensed.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12198121.1A EP2746656A1 (fr) | 2012-12-19 | 2012-12-19 | Drainage d'une centrale |
US14/652,194 US9719676B2 (en) | 2012-12-19 | 2013-12-03 | Draining a power plant |
PCT/EP2013/075334 WO2014095337A2 (fr) | 2012-12-19 | 2013-12-03 | Drainage d'une centrale électrique |
ES13799059T ES2781836T3 (es) | 2012-12-19 | 2013-12-03 | Desagüe de una central eléctrica |
EP13799059.4A EP2923149B1 (fr) | 2012-12-19 | 2013-12-03 | Drainage d'une centrale électrique |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12198121.1A EP2746656A1 (fr) | 2012-12-19 | 2012-12-19 | Drainage d'une centrale |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2746656A1 true EP2746656A1 (fr) | 2014-06-25 |
Family
ID=47563062
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12198121.1A Withdrawn EP2746656A1 (fr) | 2012-12-19 | 2012-12-19 | Drainage d'une centrale |
EP13799059.4A Active EP2923149B1 (fr) | 2012-12-19 | 2013-12-03 | Drainage d'une centrale électrique |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13799059.4A Active EP2923149B1 (fr) | 2012-12-19 | 2013-12-03 | Drainage d'une centrale électrique |
Country Status (4)
Country | Link |
---|---|
US (1) | US9719676B2 (fr) |
EP (2) | EP2746656A1 (fr) |
ES (1) | ES2781836T3 (fr) |
WO (1) | WO2014095337A2 (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015206484A1 (de) * | 2015-04-10 | 2016-10-13 | Siemens Aktiengesellschaft | Verfahren zum Aufbereiten eines flüssigen Mediums und Aufbereitungsanlage |
US10054012B2 (en) | 2014-03-05 | 2018-08-21 | Siemens Aktiengesellschaft | Flash tank design |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016214447B4 (de) | 2016-08-04 | 2020-12-24 | Siemens Aktiengesellschaft | Kraftwerk mit Phasenwechselmaterial-Wärmespeicher und Verfahren zum Betreiben eines Kraftwerks mit Phasenwechselmaterial-Wärmespeicher |
CN110374700B (zh) * | 2019-07-18 | 2024-05-03 | 中国电力工程顾问集团西南电力设计院有限公司 | 一种燃气-蒸汽联合循环机组疏水回收*** |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3008295A (en) * | 1958-04-21 | 1961-11-14 | Sulzer Ag | Steam power plant |
US4430962A (en) * | 1980-12-23 | 1984-02-14 | Sulzer Brothers Ltd. | Forced flow vapor generator plant |
WO2006058845A1 (fr) | 2004-11-30 | 2006-06-08 | Siemens Aktiengesellschaft | 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 |
US20070289304A1 (en) * | 2004-01-20 | 2007-12-20 | Siemens Aktiengesellschaft | Method And Device For Removing Water From A Steam Plant |
WO2012066490A1 (fr) * | 2010-11-16 | 2012-05-24 | Ansaldo Energia S.P.A. | Installation à cycle combiné pour production d'énergie et procédé de fonctionnement de ladite installation |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1997007323A1 (fr) * | 1995-08-18 | 1997-02-27 | Siemens Aktiengesellschaft | Installation a turbine a gaz et a vapeur et procede de fonctionnement de ladite installation ainsi que generateur de vapeur de chaleur perdue pour une telle installation |
JP3690972B2 (ja) * | 2000-08-08 | 2005-08-31 | 三菱重工業株式会社 | 蒸気冷却ガスタービン |
EP2503112A1 (fr) * | 2011-03-24 | 2012-09-26 | Siemens Aktiengesellschaft | Procédé de commutation rapide d'un émetteur de vapeur |
JP2014008501A (ja) * | 2012-07-03 | 2014-01-20 | Mitsubishi Heavy Ind Ltd | 排水処理システム及び複合発電設備 |
-
2012
- 2012-12-19 EP EP12198121.1A patent/EP2746656A1/fr not_active Withdrawn
-
2013
- 2013-12-03 EP EP13799059.4A patent/EP2923149B1/fr active Active
- 2013-12-03 US US14/652,194 patent/US9719676B2/en active Active
- 2013-12-03 ES ES13799059T patent/ES2781836T3/es active Active
- 2013-12-03 WO PCT/EP2013/075334 patent/WO2014095337A2/fr active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3008295A (en) * | 1958-04-21 | 1961-11-14 | Sulzer Ag | Steam power plant |
US4430962A (en) * | 1980-12-23 | 1984-02-14 | Sulzer Brothers Ltd. | Forced flow vapor generator plant |
US20070289304A1 (en) * | 2004-01-20 | 2007-12-20 | Siemens Aktiengesellschaft | Method And Device For Removing Water From A Steam Plant |
WO2006058845A1 (fr) | 2004-11-30 | 2006-06-08 | Siemens Aktiengesellschaft | 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 |
US20080104959A1 (en) * | 2004-11-30 | 2008-05-08 | Michael Schottler | 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 |
WO2012066490A1 (fr) * | 2010-11-16 | 2012-05-24 | Ansaldo Energia S.P.A. | Installation à cycle combiné pour production d'énergie et procédé de fonctionnement de ladite installation |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10054012B2 (en) | 2014-03-05 | 2018-08-21 | Siemens Aktiengesellschaft | Flash tank design |
DE102015206484A1 (de) * | 2015-04-10 | 2016-10-13 | Siemens Aktiengesellschaft | Verfahren zum Aufbereiten eines flüssigen Mediums und Aufbereitungsanlage |
Also Published As
Publication number | Publication date |
---|---|
WO2014095337A3 (fr) | 2014-11-20 |
ES2781836T3 (es) | 2020-09-08 |
EP2923149A2 (fr) | 2015-09-30 |
EP2923149B1 (fr) | 2020-02-05 |
US9719676B2 (en) | 2017-08-01 |
US20150323176A1 (en) | 2015-11-12 |
WO2014095337A2 (fr) | 2014-06-26 |
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