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WO1997011259A1 - Procede et dispositif de prechauffage de l'eau d'alimentation d'un generateur de vapeur dans les processus de centrales electriques - Google Patents

Procede et dispositif de prechauffage de l'eau d'alimentation d'un generateur de vapeur dans les processus de centrales electriques Download PDF

Info

Publication number
WO1997011259A1
WO1997011259A1 PCT/EP1996/003869 EP9603869W WO9711259A1 WO 1997011259 A1 WO1997011259 A1 WO 1997011259A1 EP 9603869 W EP9603869 W EP 9603869W WO 9711259 A1 WO9711259 A1 WO 9711259A1
Authority
WO
WIPO (PCT)
Prior art keywords
steam
feed water
preheating
exergy
generator
Prior art date
Application number
PCT/EP1996/003869
Other languages
German (de)
English (en)
Inventor
Norbert KNÜWER
Achim Nietzschmann
Wolfgang Urbanczyk
Original Assignee
Steag Aktiengesellschaft
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 Steag Aktiengesellschaft filed Critical Steag Aktiengesellschaft
Priority to EP96931765A priority Critical patent/EP0851971B1/fr
Priority to DE59608461T priority patent/DE59608461D1/de
Priority to AT96931765T priority patent/ATE210783T1/de
Publication of WO1997011259A1 publication Critical patent/WO1997011259A1/fr

Links

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steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating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steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of extraction or non-condensing type; Use of steam for feed-water heating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 power plant processes, steam being used as bleed steam to raise the temperature of the feed water after partial expansion in a turbine.
  • the invention further relates to an arrangement for carrying out this method.
  • Turbine taps of this type require a considerable amount of production.
  • the invention is based on the object of improving the cost / benefit ratio in the preheating of the feed water.
  • the solution to this problem according to the invention is that at least two partial steam quantities located at different levels of exergy are removed from the power plant process and mixed using a thermocompression process, the partial steam quantity located at a higher exergy level being used as motive steam for drawing in and compressing the partial steam quantity located at a lower exergy level; and that the steam mixture after the thermocompression is fed to a heat exchanger through which the feed water flows.
  • the associated arrangement for carrying out the method is characterized in that steam taps are arranged at at least two spatially separate points in the power plant process, at which partial steam quantities located at different levels of exergy can be found in the power plant process; that the two taps located at different steam exergy levels are connected to a steam jet, the tapping of higher exergy levels being connected to the motive steam connection and the other tap to the suction steam connection of the steam jet; and that the output of the steam radiator is connected to the preheater in order to raise the feed water temperature.
  • This subject of the invention is almost universally applicable.
  • the arrangement according to the invention can, of course, be integrated into newly designed power plants, with suitable selection of the taps and design of the at least one thermocompressor being able to bring the steam jet outlet temperature very close to the maximum permissible pressure of the respective preheater.
  • the efficiency of the feed water heating is correspondingly high.
  • the invention makes it possible to save on expensive HD tapping.
  • the thermal compressors or steam jets used according to the invention can be produced relatively inexpensively.
  • a preferred method of operation is characterized in that the partial steam quantity of a turbine engine, which is at a lower exergy level, tap or a cold reheat (KZÜ) and is mixed under thermal compression with a portion of the steam taken from the steam generator.
  • the steam removed from the steam generator is particularly suitable as motive steam for the thermocompressor or the steam jet.
  • the feed water is preferably preheated in several stages, and the steam mixture is fed to the highest preheater stage after thermocompression.
  • inferior tap steam after thermal compression with KZÜ steam can be fed to a lower stage of the preheater line for preheating the feed water.
  • the operating pressures at the HDV high-pressure preheater
  • the operating pressure in the preheater can be decoupled from the turbine outlet pressure using suitable non-return flaps.
  • Figure la shows a section of the basic circuit of a conventional steam power plant with feed water preheating
  • 1 shows a basic circuit improved by incorporating an exemplary embodiment of the invention
  • Fig. 2a with a section of a conventional base circuit of another steam power plant
  • FIG. 2 shows a power plant arrangement with feed water preheating comparable to the conventional arrangement according to FIG. 2a according to another exemplary embodiment of the invention.
  • the feed water of a steam generator 1 is extracted from a feed Water tank 4 is conveyed by a feed water pump 5 into a preheating line, designated as a whole, from two successive high-pressure preheaters HDV1 and HDV2.
  • a preheating line designated as a whole
  • the feed water temperature is gradually raised until the feed water reaches the desired temperature at the entry point 7 into the steam generator 1.
  • the outlet steam from a high-pressure turbine 2 which is also referred to as cold reheat steam (KZÜ steam) is used to raise the temperature of the feed water in the last preheating stage HDV2.
  • KZÜ steam cold reheat steam
  • the feed water target temperature is reached.
  • the preceding preheating stage HDV1 is charged with exergetically relatively high-quality tapping steam from tapping A2 of the double-flow medium-pressure turbine 3.
  • Exergetically relatively low-quality steam from a tap A3 is returned to the feed water tank 4.
  • the arrangement according to the invention of the exemplary embodiment according to FIG. 1 differs from the conventional arrangement according to FIG. 1 a by a different and cost-damping feed water preheating.
  • the last preheating stage HDV2 is acted upon by a steam mixture from a thermocompressor or steam jet 11 to raise the temperature of the feed water, the driving steel connection 12 of which is supplied with driving steam from a reheating stage of the steam generator 1.
  • KZÜ steam is supplied to a suction connection 13 of the steam radiator 11.
  • the KZÜ steam drawn in via 13 is compressed in the steam jet 11 and mixed with the motive steam from the steam generator 1.
  • the motive steam does not need to be removed from the reheater area of the steam generator 1; instead, the extraction point can be arranged at any suitable point in the steam generator or in the subsequent live steam line 16 in front of the inlet valves of the HP turbine.
  • a second steam jet 31 is provided in the exemplary embodiment according to FIG. 1, the exergetically inferior steam from the tap A3 of the MD turbine 3 below Use of motive steam is sucked in from the steam generator 1. The resulting steam mixture is used to raise the temperature in the first preheating stage HDVl.
  • the motive steam connections 12 and 32 of the two steam jets 11 and 31 are connected in parallel, while the suction connections 13 and 33 are acted upon with different bleed steam from AI or A3.
  • the conventional basic circuit according to FIG. 2a differs from that according to FIG. 1a by a third preheating stage HDV3 in the preheater line 6 '.
  • HDV3 raises the feed water to the target temperature at inlet 7 of steam generator 1.
  • the third preheater HDV3 is supplied with steam from a high-pressure turbine tap AZ.
  • This conventional design requires high investment costs due to the HD tap AZ.
  • the invention manages with at least a comparably favorable temperature rise of the feed water at the inlet point 7 without HD tap AZ.
  • a suitable circuit arrangement is shown in FIG. 2.
  • thermocompressor or steam radiator 11 correspond to those from FIG. 1.
  • the second preheater HDV1 is acted upon by KZÜ steam from the tap AI.
  • the first preheating stage HDV1 is subjected to energetically inferior tapping steam from the tapping A3 of the MD turbine 3, namely after thermocompression by means of motive steam in a second thermocompressor or steam jet 31.
  • Its output connection 34 is connected to the HDVl connected.
  • the KZÜ steam from the tap AI serves as motive steam.
  • the motive steam connection 32 of the steam emitter 31 and the suction connection 13 of the steam emitter 11 are therefore connected in parallel.
  • the driving steam connection 32 could also be connected in parallel to the driving steam connection 12 in accordance with the embodiment according to FIG. 1 and steam from the steam generation line 19 could be applied to it.
  • a safety shut-off valve 18 is connected upstream of the motive steam connection 12 of the steam radiator 11. It protects the preheater HDV2 or HDV3, which is acted upon by the steam jet 11, against impermissible operating states.
  • the operating pressure at the resulting steam jet outlet temperature in the outlet 14 can be approximated to the maximum permissible pressure in the associated preheater (HDV2 or HDV3).
  • the operating pressure in the preheater can be decoupled from the outlet pressure of the HP turbine by means of suitable check valves.

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)

Abstract

Pour augmenter la température de l'eau d'alimentation d'un générateur de vapeur (1), le dernier étage de préchauffage (HDV2) est alimenté par un mélange de vapeur provenant d'un thermocompresseur (11). De la vapeur KZÜ (vapeur froide de surchauffe intermédiaire) provenant d'une prise de sortie (A1) de la turbine haute pression est acheminée vers un raccord d'entrée (13) du thermocompresseur (11). Pour ce faire, on se sert de la vapeur provenant du générateur de vapeur comme vapeur motrice avec laquelle on comprime et à laquelle on mélange la vapeur KZÜ. Avec un second thermocompresseur (31), on aspire de la vapeur de valeur exergétique moindre, d'une prise (A3) d'une turbine moyenne pression (3) en utilisant de la vapeur motrice provenant du générateur de vapeur (1). Le mélange de vapeur ainsi obtenu est utilisé pour augmenter la température du premier étage de préchauffage (HDV1) du système de préchauffage (6).
PCT/EP1996/003869 1995-09-22 1996-09-04 Procede et dispositif de prechauffage de l'eau d'alimentation d'un generateur de vapeur dans les processus de centrales electriques WO1997011259A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP96931765A EP0851971B1 (fr) 1995-09-22 1996-09-04 Procede et dispositif de prechauffage de l'eau d'alimentation d'un generateur de vapeur dans les processus de centrales electriques
DE59608461T DE59608461D1 (de) 1995-09-22 1996-09-04 Verfahren und anordnung zum vorwärmen des speisewassers eines dampferzeugers in kraftwerksprozessen
AT96931765T ATE210783T1 (de) 1995-09-22 1996-09-04 Verfahren und anordnung zum vorwärmen des speisewassers eines dampferzeugers in kraftwerksprozessen

Applications Claiming Priority (2)

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
DE19535318.8 1995-09-22

Publications (1)

Publication Number Publication Date
WO1997011259A1 true WO1997011259A1 (fr) 1997-03-27

Family

ID=7772924

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1996/003869 WO1997011259A1 (fr) 1995-09-22 1996-09-04 Procede et dispositif de prechauffage de l'eau d'alimentation d'un generateur de vapeur dans les processus de centrales electriques

Country Status (5)

Country Link
EP (1) EP0851971B1 (fr)
AT (1) ATE210783T1 (fr)
DE (2) DE19535318C2 (fr)
TR (1) TR199800323T1 (fr)
WO (1) WO1997011259A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN115163232A (zh) * 2022-06-30 2022-10-11 华能海南发电股份有限公司东方电厂 一种高参数供热装置及方法

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AUPN236595A0 (en) 1995-04-11 1995-05-11 Rescare Limited Monitoring of apneic arousals
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
EP2333256B1 (fr) * 2009-12-08 2013-10-16 Alstom Technology Ltd Centrale électrique dotée de capture de CO2 et son procédé d'opération
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
CN105736079B (zh) * 2015-08-22 2018-08-03 广东东南输变电工程有限公司 发电系统电网运行控制方法
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

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3238729A (en) * 1962-07-23 1966-03-08 Ass Elect Ind 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

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3103917A (en) * 1958-04-17 1963-09-17 Rolls Royce Steam generating plant

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3238729A (en) * 1962-07-23 1966-03-08 Ass Elect Ind 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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 010, no. 320 (M - 530) 30 October 1986 (1986-10-30) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN115163232A (zh) * 2022-06-30 2022-10-11 华能海南发电股份有限公司东方电厂 一种高参数供热装置及方法

Also Published As

Publication number Publication date
DE19535318C2 (de) 1997-11-27
TR199800323T1 (xx) 1998-05-21
DE59608461D1 (de) 2002-01-24
EP0851971B1 (fr) 2001-12-12
ATE210783T1 (de) 2001-12-15
DE19535318A1 (de) 1997-03-27
EP0851971A1 (fr) 1998-07-08

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