EP0851971B1 - Verfahren und anordnung zum vorwärmen des speisewassers eines dampferzeugers in kraftwerksprozessen - Google Patents
Verfahren und anordnung zum vorwärmen des speisewassers eines dampferzeugers in kraftwerksprozessen Download PDFInfo
- Publication number
- EP0851971B1 EP0851971B1 EP96931765A EP96931765A EP0851971B1 EP 0851971 B1 EP0851971 B1 EP 0851971B1 EP 96931765 A EP96931765 A EP 96931765A EP 96931765 A EP96931765 A EP 96931765A EP 0851971 B1 EP0851971 B1 EP 0851971B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- steam
- ejector
- exergy
- disposed
- generator
- 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.)
- Expired - Lifetime
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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steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/34—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steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of extraction or non-condensing type; Use of steam for feed-water heating
- F01K7/40—Use of two or more feed-water heaters in series
Definitions
- the invention relates to a method for preheating the Feed water of a steam generator in a power plant process according to the preamble of claim 1. Furthermore, the invention relates an arrangement according to the preamble of claim 3.
- From US-A-3 973 402 is a steam turbine power plant with a feed water preheating of the generic type known.
- the steam is drawn from a high-pressure turbine tapping with a higher level of exergy Driving steam mixed in a steam jet to increase efficiency to improve the power plant process.
- motive steam serves the exhaust steam of a reheater, which is made with steam the steam generator is operated.
- This known arrangement improves process efficiency, but requires one costly turbine tapping and a relatively complex control the motive steam and suction steam connections.
- the invention has for its object the cost / benefit ratio to improve feed water preheating.
- the arrangement according to the invention can of course be from the house can be integrated into newly designed power plants, whereby through suitable selection of the taps and interpretation of the at least a thermocompressor a very close approximation of the Steam jet outlet pressure or temperature at the maximum permissible pressure or the maximum permissible temperature of the respective preheater can be reached. Accordingly the efficiency of the preheating of the feed water is high.
- the thermal compressors used according to the invention or steam jets are relatively inexpensive producible.
- the feed water is preferably preheated in several stages, and the steam mixture is after the thermal compression of the highest preheater level.
- the steam mixture is after the thermal compression of the highest preheater level.
- inferior bleed steam after thermocompression with KZÜ steam from a lower stage of the preheater line be supplied for preheating water.
- the exit steam from a high pressure turbine 2 which is also used as a cold reheat steam (KZÜ steam) is referred to for raising the temperature of the feed water in the last preheating stage HDV2 used.
- KZÜ steam cold reheat steam
- At the entry point 7 in the steam generator 1 is the feed water target temperature reached.
- the previous preheating stage HDV1 will with exergetically relatively high quality tap steam from the Tap A2 of the two-flow medium pressure turbine 3 is applied. Exergetically relatively inferior steam from one Tap A3 is fed back into the feed water tank 4.
- the arrangement of the embodiment according to the invention 1 differs from the conventional arrangement 1a by a different and cost-damping Feed water preheating.
- the last preheating stage HDV2 becomes Raising the temperature of the feed water with a steam mixture acted upon by a thermal compressor or steam jet 11, whose driving steel connection 12 with driving steam from a reheating stage is applied to the steam generator 1.
- One Suction port 13 of the steam jet 11 is fed KZÜ steam.
- the KZÜ steam sucked in over 13 is in the steam jet 11 compressed and with the motive steam from the steam generator 1 mixed.
- the motive steam does not need the reheater area to be removed from the steam generator 1; instead can the tapping point at any suitable point in the steam generator or in the subsequent live steam line 16 the inlet valves of the HP turbine.
- second steam jet 31 is provided, the exergetically inferior Steam from the tap A3 of the MD turbine 3 below Use of motive steam is sucked out of the steam generator 1.
- the resulting steam mixture is used to raise the temperature in the first preheating stage HDV1.
- the motive steam connections 12 and 32 of the two steam jets 11 and 31 are connected in parallel, while the suction ports 13 and 33 with different Tap steam from A1 or A3 are acted on.
- the conventional basic circuit according to FIG. 2a differs differs from that according to FIG. 1a by a third preheating stage HDV3 in the preheater street 6 '.
- HDV3 lifts the feed water to the target temperature at inlet 7 of the steam generator 1 on.
- the third preheater HDV3 is steamed from one High pressure turbine tap AZ applied. This conventional one Execution due to the high-pressure tap AZ high Investment costs.
- the invention comes in at least comparably cheaper Raising the temperature of the feed water at the inlet point 7 without HD tap AZ off.
- a suitable circuit arrangement is shown in Fig. 2.
- thermocompressor or steam jet 11 corresponds to those from FIG. 1.
- the second preheater HDV1 is just like the corresponding one Preheater of the conventional arrangement according to FIG. 2a with KZÜ steam from tap A1.
- Thermocompressor or steam jet 31 is also the first Preheating stage HDV1 with low-energy tap steam from the tapping A3 of the MD turbine 3 after thermal compression by motive steam in a second Thermocompressor or steam jet 31. Its outlet connection 34 is connected to the HDV1.
- the motive steam connection 32 of the steam jet 31 and the suction port 13 of the steam jet 11 are therefore connected in parallel.
- the motive steam connection could 32 also in accordance with the embodiment according to FIG. 1 connected in parallel to the motive steam connection 12 and with steam be acted upon from the steam generation line 19.
- a safety shut-off valve 18 the motive steam connection 12 upstream of the steam jet 11. It secures the Preheater HDV2 or HDV3 acted upon by steam jet 11 against impermissible operating conditions.
- the operating pressure can be applied at the resulting steam jet outlet temperature in outlet 14 to the maximum permissible pressure in the associated preheater (HDV2 or HDV3) be approximated.
- the operating pressure in the preheater can vary from Outlet pressure of the high-pressure turbine through suitable check valves be decoupled.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Turbines (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
- Jet Pumps And Other Pumps (AREA)
Description
- Fig. 1A
- einen Ausschnitt aus der Basisschaltung eines herkömmlichen Dampfkraftwerks mit Speisewasservorwärmung;
- Fig. 1
- eine durch Einbau eines Ausführungsbeispiels der Erfindung verbesserte Basisschaltung;
- Fig. 2A
- einen Ausschnitt einer herkömmlichen Basisschaltung eines anderen Dampfkraftwerks mit Hochdruckturbinenanzapfung; und
- Fig. 2
- eine mit der herkömmlichen Anordnung gemäß Fig. 2A vergleichbare Kraftwerkanordnung mit Speisewasservorwärmung gemäß einem anderen Ausführungsbeispiel der Erfindung.
Claims (6)
- Verfahren zum Vorwärmen des Speisewassers eines Dampferzeugers (1) in einem Kraftwerksprozeß,wobei wenigstens zwei auf unterschiedlichen Exergieniveaus befindliche Dampf-Teilmengen dem Kraftwerksprozeß entnommen und unter Verwendung eines Thermokompressionsverfahrens gemischt werden,wobei die auf höherem Exergieniveau befindliche Dampf-Teilmenge als Treibdampf zum Ansaugen und Verdichten der auf niedrigerem Exergieniveau befindlichen Dampf-Teilmenge verwendet wird; undwobei die Dampfmischung nach der Thermokompression einer Speisewasser-Vorwärmer (HDV2; HDV3) zugeführt wird;
dadurch gekennzeichnet,daß die auf höherem Exergieniveau befindliche Dampf-Teilmenge direkt dem Dampferzeuger oder einer dem Dampferzeuger nachfolgenden Frischdampfleitung (16) entnommenen wird; unddaß die auf niedrigerem Exergieniveau befindliche Dampf-Teilmenge nach teilweiser Entspannung in einer Turbine (2) einer kalten Zwischenüberhitzung (KZÜ) entnommen wird. - Verfahren nach Anspruch 1, dadurch gekennzeichnet,daß das Speisewasser mehrstufig vorgewärmt wird,daß die Dampfmischung nach der Thermokompression der höchsten Vorwärmstufe zugeführt wird unddaß auf niedrigem Exergieniveau befindlicher Anzapfdampf nach Thermokompression mit Zwischenüberhitzerdampf oder Frischdampf aus dem Dampferzeuger (1) oder einer diesem nachfolgenden Frischdampfleitung (16) einer niedrigeren Speisewasser-Vorwärmerstufe (HDV1; HDV2) zugeführt wird.
- Anordnung zum Vorwärmen des Speisewassers eines Dampferzeugers (1), dessen Dampf in einer nachgeschalteten Turbinenanordnung (3) in einem Kraftwerksprozeß entspannt wird,wobei an wenigstens zwei räumlich getrennten Stellen (19, A1) des Kraftwerksprozesses Dampfanzapfungen angeordnet sind, an denen auf unterschiedlichen Exergieniveaus befindliche Dampf-Teilmengen dem Kraftwerksprozeß entnehmbar sind;wobei die beiden auf unterschiedlichen Dampf-Exergieniveaus befindlichen Anzapfungen mit einem Dampfstrahler (11) verbunden sind, wobei die Anzapfung höheren Exergieniveaus mit dem Treibdampfanschluß (12) und die andere Anzapfung mit dem Saugdampfanschluß (13) des Dampfstrahlers verbunden ist; undwobei der Ausgang (14) des Dampfstrahlers (11) mit der höchsten Speisewasser-Vorwärmstufe (HDV2; HDV3) gekoppelt ist;
dadurch gekennzeichnet,daß der Treibdampfanschluß (12) des Dampfstrahlers (11) direkt mit dem Dampferzeuger (1) oder einer dem Dampferzeuger nachfolgenden Frischdampfleitung (16) verbunden ist; unddaß der Saugdampfanschluß (13) des Dampfstrahlers (11) mit einer Zwischenüberhitzung (KZÜ) verbunden ist. - Anordnung nach Anspruch 3, dadurch gekennzeichnet, daß der Ausgang (14) des Dampfstrahlers (11) mit der höchsten Stufe (HDV2; HDV3) einer mehrstufigen Vorwärmstufe (6; 6') gekoppelt ist.
- Anordnung nach Anspruch 4, dadurch gekennzeichnet,daß eine Anzapfung (A3) für auf niedrigerem Exergieniveau befindlichen Dampf vorgesehen ist;daß die niederexergetische Anzapfung mit dem Saugdampfanschluß (33) eines zweiten Dampfstrahlers (31) verbunden ist;daß der Treibdampfstrahlanschluß (32) des zweiten Dampfstrahlers (31) mit dem Dampferzeuger (1), einer diesem nachfolgenden Frischdampfleitung (16) oder mit einer Anzapfung einer Zwischenüberhitzung (A1) verbunden ist; unddaß der Ausgang (34) des Dampfstrahlers (31) mit einer niedrigen Speisewasser-Vorwärmstufe (HDV1) gekoppelt ist.
- Anordnung nach einem der Ansprüche 3 bis 5, dadurch gekennzeichnet, daß Mittel (18) zum Entkoppeln der Anschlüsse (12, 13) des Dampfstrahlers (11) vorgesehen sind.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19535318A DE19535318C2 (de) | 1995-09-22 | 1995-09-22 | Verfahren und Anordnung zum Vorwärmen des Speisewassers eines Dampferzeugers in Kraftwerksprozessen |
DE19535318 | 1995-09-22 | ||
PCT/EP1996/003869 WO1997011259A1 (de) | 1995-09-22 | 1996-09-04 | Verfahren und anordnung zum vorwärmen des speisewassers eines dampferzeugers in kraftwerksprozessen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0851971A1 EP0851971A1 (de) | 1998-07-08 |
EP0851971B1 true EP0851971B1 (de) | 2001-12-12 |
Family
ID=7772924
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96931765A Expired - Lifetime EP0851971B1 (de) | 1995-09-22 | 1996-09-04 | Verfahren und anordnung zum vorwärmen des speisewassers eines dampferzeugers in kraftwerksprozessen |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0851971B1 (de) |
AT (1) | ATE210783T1 (de) |
DE (2) | DE19535318C2 (de) |
TR (1) | TR199800323T1 (de) |
WO (1) | WO1997011259A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6363270B1 (en) | 1995-04-11 | 2002-03-26 | Resmed Limited | Monitoring the occurrence of apneic and hypopneic arousals |
CN105736079A (zh) * | 2015-08-22 | 2016-07-06 | 赵东旭 | 发电系统电网运行控制方法 |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19736888A1 (de) * | 1997-08-25 | 1998-10-01 | Siemens Ag | Verfahren zum Betreiben eines Durchlaufdampferzeugers und Durchlaufdampferzeuger zur Durchführung des Verfahrens sowie Gas- und Dampfturbinenanlage |
DE19806238C1 (de) * | 1998-02-16 | 1999-04-15 | Steag Ag | Wärmetauscheranordnung |
US8091361B1 (en) * | 2007-11-05 | 2012-01-10 | Exergetic Systems, Llc | Method and apparatus for controlling the final feedwater temperature of a regenerative Rankine cycle using an exergetic heater system |
EP2333256B1 (de) * | 2009-12-08 | 2013-10-16 | Alstom Technology Ltd | Kraftwerk mit CO2-Erfassung und Verfahren zum Betrieb eines solchen Kraftwerks |
DE102011078193A1 (de) * | 2011-06-28 | 2013-01-03 | Siemens Aktiengesellschaft | Zusätzliche Regelanzapfung für einen Vorwärmer zur Verbesserung der Anlagendynamik und Frequenzregelung bei einem Dampfkraftwerk |
FR2984400A1 (fr) * | 2011-12-19 | 2013-06-21 | Suez Environnement | Procede et installation de cogeneration avec thermocompression |
DE102013225543B3 (de) * | 2013-12-11 | 2015-02-12 | Currenta Gmbh & Co.Ohg | Dampfspeicherung mit Latentwärmespeicher und Dampf-Thermokompressor |
CN105888753B (zh) * | 2016-05-16 | 2017-02-22 | 普瑞森能源科技(北京)股份有限公司 | 中低压连通蝶阀调节联合热压机中低压工业供汽方法和系统 |
CN106014499B (zh) * | 2016-05-16 | 2017-08-29 | 张曙光 | 基于热压原理的高低压汽源切换系统汽动给水泵及控制方法 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3103917A (en) * | 1958-04-17 | 1963-09-17 | Rolls Royce | Steam generating plant |
GB971195A (en) * | 1962-07-23 | 1964-09-30 | Ass Elect Ind | Improvements in steam turbine power plants |
US3973402A (en) * | 1974-01-29 | 1976-08-10 | Westinghouse Electric Corporation | Cycle improvement for nuclear steam power plant |
JPS61126309A (ja) * | 1984-11-22 | 1986-06-13 | Toshiba Corp | 蒸気発電プラント |
DE3616797A1 (de) * | 1986-05-17 | 1987-11-19 | Koerting Ag | Dampfturbinenanlage |
-
1995
- 1995-09-22 DE DE19535318A patent/DE19535318C2/de not_active Expired - Fee Related
-
1996
- 1996-09-04 EP EP96931765A patent/EP0851971B1/de not_active Expired - Lifetime
- 1996-09-04 TR TR1998/00323T patent/TR199800323T1/xx unknown
- 1996-09-04 DE DE59608461T patent/DE59608461D1/de not_active Expired - Lifetime
- 1996-09-04 AT AT96931765T patent/ATE210783T1/de active
- 1996-09-04 WO PCT/EP1996/003869 patent/WO1997011259A1/de active IP Right Grant
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6363270B1 (en) | 1995-04-11 | 2002-03-26 | Resmed Limited | Monitoring the occurrence of apneic and hypopneic arousals |
CN105736079A (zh) * | 2015-08-22 | 2016-07-06 | 赵东旭 | 发电系统电网运行控制方法 |
Also Published As
Publication number | Publication date |
---|---|
DE19535318C2 (de) | 1997-11-27 |
WO1997011259A1 (de) | 1997-03-27 |
DE59608461D1 (de) | 2002-01-24 |
TR199800323T1 (xx) | 1998-05-21 |
EP0851971A1 (de) | 1998-07-08 |
DE19535318A1 (de) | 1997-03-27 |
ATE210783T1 (de) | 2001-12-15 |
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