EP0604390A2 - Method for feeding a multiple pressure steam generator and feed pump - Google Patents

Method for feeding a multiple pressure steam generator and feed pump Download PDF

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Publication number
EP0604390A2
EP0604390A2 EP93890249A EP93890249A EP0604390A2 EP 0604390 A2 EP0604390 A2 EP 0604390A2 EP 93890249 A EP93890249 A EP 93890249A EP 93890249 A EP93890249 A EP 93890249A EP 0604390 A2 EP0604390 A2 EP 0604390A2
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EP
European Patent Office
Prior art keywords
pressure
feed pump
steam generator
feed
stages
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Withdrawn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
EP93890249A
Other languages
German (de)
French (fr)
Other versions
EP0604390A3 (en
Inventor
Peter Dipl.-Ing. Antosijevicz
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.)
Austrian Energy and Environment AG and Co KG
Austrian Energy and Environment SGP Waagner Biro GmbH
Original Assignee
Austrian Energy and Environment AG and Co KG
Austrian Energy and Environment SGP Waagner Biro GmbH
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 Austrian Energy and Environment AG and Co KG, Austrian Energy and Environment SGP Waagner Biro GmbH filed Critical Austrian Energy and Environment AG and Co KG
Publication of EP0604390A2 publication Critical patent/EP0604390A2/en
Publication of EP0604390A3 publication Critical patent/EP0604390A3/en
Withdrawn legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D1/06—Multi-stage pumps
    • F04D1/10—Multi-stage pumps with means for changing the flow-path through the stages, e.g. series-parallel, e.g. side loads
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D1/06—Multi-stage pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/12—Combinations of two or more pumps
    • F04D13/14—Combinations of two or more pumps the pumps being all of centrifugal type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
    • F04D15/0209—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
    • F04D15/0218—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid the condition being a liquid level or a lack of liquid supply
    • F04D15/0227—Lack of liquid level being detected using a flow transducer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
    • F22D11/00—Feed-water supply not provided for in other main groups
    • F22D11/02—Arrangements of feed-water pumps

Abstract

The system feeds a steam generator which can produce steam at a variety of pressures. It has a heating boiler with HP and LP heating surfaces esp. heated by gases from gas turbines. The water is supplied to the boiler by an eg. two-stage feed pump (1) with a single feed pipe (12) and LP (2) and HP (3) output tappings feeding water via pipes (11,10) and control valves to different parts of the boiler. There is a relief output pipe (9) connected to the HP tapping on the pump to release water and prevent bursting of the pump if the outputs to the boiler should be shut off.

Description

Die Erfindung betrifft ein Verfahren zur Speisung eines Mehrdruckdampferzeugers, insbesondere eines Abhitzekessels mit Hoch- und Niederdruckheizflächen, vorzugsweise nach Gasturbinen, mittels mehrstufiger Speisepumpe und angeschlossenen Schutzeinrichtungen, sowie eine Speisepumpe zur Durchführung des Verfahrens.The invention relates to a method for feeding a multi-pressure steam generator, in particular a waste heat boiler with high and low pressure heating surfaces, preferably after gas turbines, by means of a multi-stage feed pump and connected protective devices, and a feed pump for carrying out the method.

Es sind Mehrdruckdampferzeuger bekannt, bei welchen zur Speisung der Heizflächen mit unterschiedlichem Betriebsdruck jeweils eigene Speisepumpen, bzw. Speisepumpenaggregate vorgesehen werden, die sowohl vor der Speisepumpe als auch nach dieser Schutzeinrichtungen benötigen, sodaß die mehrfache Anordnung dieser Aggregate auch die mehrfache Verwendung von Schutzeinrichtungen beinhaltet. Dazu kommt noch, daß die Mehrfachanordnung auch sehr viel Platz, bzw. Installationseinrichtungen benötigt.Multi-pressure steam generators are known in which separate feed pumps or feed pump assemblies are provided for feeding the heating surfaces with different operating pressures, which require protection devices both before the feed pump and after these, so that the multiple arrangement of these assemblies also includes the multiple use of protective devices. In addition, the multiple arrangement also requires a lot of space and installation facilities.

Die Erfindung hat es sich zur Aufgabe gestellt, den angegebenen Problemkreis zu verbessern und eine platzsparende Lösung vorzusehenThe object of the invention is to improve the specified problem area and to provide a space-saving solution

Das erfindungsgemäße Verfahren ist dadurch gekennzeichnet, daß die mehrstufige Speisepumpe zwischen zwei Druckstufen einen Druckstutzen aufweist, über welchen ein Teilstrom des angesaugten Speisewassers in den Niederdruckteil des Dampferzeugers geführt wird, während der Reststrom, insbesondere Hauptstrom, auf höheren Druck gebracht und in den Hochdruckteil des Dampferzeugers eingespeist wird, und daß durch eine Regeleinrichtung die Mindestdurchströmmengen für die einzelnen Heizflächen im Nieder- und Hochdruckbereich eingeregelt werden.The method according to the invention is characterized in that the multi-stage feed pump has a pressure port between two pressure stages, via which a partial flow of the sucked-in feed water is led into the low pressure part of the steam generator, while the residual flow, in particular main flow, is brought to higher pressure and into the high pressure part of the steam generator is fed in, and that the minimum flow rates for the individual heating surfaces in the low and high pressure range are regulated by a control device.

Die erfindungsgemäße Einrichtung ist dadurch gekennzeichnet, daß die mehrstufige Speisepumpe mindestens zwei Druckstutzen in unterschiedlichen Druckstufen, vorzugsweise innerhalb eines Gehäuses, aufweist. Insbesondere weist die Speisepumpe mindestens zwei hintereinander geschaltete getrennte Stufen auf, die durch eine äußere Druckleitung mit einer Abzweigleitung verbunden sind.The device according to the invention is characterized in that the multi-stage feed pump has at least two pressure ports in different pressure stages, preferably within a housing. In particular, the feed pump has at least two separate stages connected in series, which are connected to a branch line by an external pressure line.

Die Erfindung ist in der angeschlossenen Zeichnung beispielsweise und schematisch in Form von zwei Ausführungsbeispielen dargestellt.The invention is shown in the attached drawing, for example and schematically in the form of two exemplary embodiments.

Fig. 1 zeigt eine eingehäusige Speisepumpe mit zwei Druckstutzen und Fig. 2 eine zweigehäusige Speisepumpe bei der in der Verbindungsleitung eine Abzweigung vorgesehen ist.Fig. 1 shows a single-case feed pump with two pressure ports and Fig. 2 shows a two-case feed pump in which a branch is provided in the connecting line.

Fig. 1 offenbart eine mehrstufige eingehäusige Speisepumpe 1 bei der zwei getrennte Stufen 4 und 5 vorgesehen sind, die jeweils einen Druckstutzen 2 und 3 aufweisen, durch welchen Speisewasser in die unterschiedlichen Druckzonen des Dampferzeugers geleitet werden. Die Ansaugleitung 12 führt vom Speisewaserbehälter zur Speisepumpe 1, wobei neben einem Ventil auch eine Siebeinrichtung vorgeshen ist. Die Speisepumpe weist zwei Auslaufstutzen auf an welchen die Niederdruckleitung 11 bzw. die Hochdruckleitung 10 angeschlossen ist. An der Hochdruckleitung 10 bzw. im Bereich des Rückschlagventiles ist eine Mindestmengenleitung 9 vorgesehen, die gewährleistet, daß bei Schließen des Ventiles durch die Pumpe eine Mindeststrommenge geführt wird, sodaß dieselbe nicht trockenlaufen kann.Fig. 1 discloses a multi-stage single-housing feed pump 1 in which two separate stages 4 and 5 are provided, each having a pressure port 2 and 3, through which feed water is conducted into the different pressure zones of the steam generator. The suction line 12 leads from the feed water tank to the feed pump 1, a sieve device also being provided in addition to a valve. The feed pump has two outlet connections to which the low-pressure line 11 and the high-pressure line 10 are connected. A minimum quantity line 9 is provided on the high-pressure line 10 or in the area of the check valve, which ensures that when the valve closes, a minimum amount of current is passed through the pump, so that the latter cannot run dry.

In Fig. 2 ist eine Konstruktionsvariante zu Fig. 1 dargestellt, bei der die Speisepumpe 1 zweigehäusig ausgebildet ist. Die Vorpumpe bzw. erste Stufe 1' ist dabei so ausgelegt, daß sie das Wasser aus der Speiseleitung 12 auf den für die Niederdruckstufe benötigten Druck anhebt. Zu diesem Zweck weist dei äußere Druckleitung 6 die die beiden Stufen 1' und 1 verbindet eine Abzweigleitung 7 auf, die über die Schutzeinrichtungen in die Niederdruckleitung 11 übergeht. Der Reststrom wird nun in die Hauptstufe der Speisepumpe 1 übergeführt, und auf Hochdruck gebracht, sowie anschließend in die Hochdruckleitung 10 eingespeist. Bei dieser Anordnung ist der Antriebsmotor 8 zwischen den beiden Stufen 4 und 5 angeordnet, wobei eventuell für die Hauptstufe der Speisepumpe 1 noch ein Getriebe vorgesehen sein kann.FIG. 2 shows a construction variant of FIG. 1, in which the feed pump 1 is constructed in two housings. The backing pump or first stage 1 'is designed so that it raises the water from the feed line 12 to the pressure required for the low pressure stage. For this purpose, the outer pressure line 6, which connects the two stages 1 'and 1, has a branch line 7 which merges into the low-pressure line 11 via the protective devices. The residual current is now transferred to the main stage of the feed pump 1, brought to high pressure and then fed into the high pressure line 10. In this arrangement, the drive motor 8 is arranged between the two stages 4 and 5, it being possible for a transmission to be provided for the main stage of the feed pump 1.

In beiden Ausführungsvarianten wird beispielsweise zwischen 20 und 30 % der angesaugten Speisewassermenge dem Niederdruckbereich des Dampferzeugers zugeführt. Der Dampferzeuger ist vorteilhafter Weise als Abhitzekessel, insbesondere nach Gasturbinen ausgebildet, sodaß der heiße Abgasstrom möglichst vollständig in Dampfenergie in beispielsweise zwei Druckstufen umgewandelt werden kann.In both versions, for example, between 20 and 30% of the amount of feed water drawn in is fed to the low-pressure area of the steam generator. The steam generator is advantageously designed as a waste heat boiler, in particular after gas turbines, so that the hot exhaust gas flow can be converted as completely as possible into steam energy in two pressure stages, for example.

Durch das erfindungsgemäße Verfahren der Einspeisung von Mehrdruckkesseln wird nicht nur der Platzbedarf der Speisepumpenanlage, die ja aus Sicherheitsgründen von mehreren parallelgeschalteten Speisepumpen gebildet ist reduziert, sondern auch das Investitionsvolumen verringert indem nicht nur im Bereich der Sicherheitseinrichtungen (eine statt mehrerer für die einzelnen Druckteile) sondern auch im Bereich der notwendigen Anschlußinstallationen bedeutende Einsparungen erzielt werden, sodaß die Mehrkosten aus der Pumpenspezialanfertigung überkompensiert werden.The method according to the invention of feeding in multi-pressure boilers not only reduces the space requirement of the feed pump system, which for safety reasons is formed by several feed pumps connected in parallel, but also reduces the investment volume by not only in the area of the safety devices (one instead of several for the individual pressure parts) but Significant savings can also be achieved in the area of the necessary connection installations, so that the additional costs from the special pump production are more than compensated for.

Claims (5)

Verfahren zur Speisung eines Mehrdruckdampferzeugers, insbesondere eines Abhitzekessels mit Hoch- und Niederdruckheizflächen, vorzugsweise nach Gasturbinen, mittels mehrstufiger Speisepumpe und angeschlossenen Schutzeinrichtungen, dadurch gekennzeichnet, daß die mehrstufige Speisepumpe zwischen zwei Druckstufen einen Druckstutzen aufweist, über welche ein Teilstrom des angesaugten Speisewassers in den Niederdruckteil des Dampferzeugers geführt wird, während der Reststrom insbesondere Hauptstrom auf höheren Druck gebracht und in den Hochdruckteil des Dampferzeugers eingespeist wird und daß durch eine Regeleinrichtung die Mindestdurchstrommengen für die einzelnen Heizflächen im Nieder- und Hochdruckbereich geregelt wird.Method for feeding a multi-pressure steam generator, in particular a waste heat boiler with high and low pressure heating surfaces, preferably after gas turbines, by means of a multi-stage feed pump and connected protective devices, characterized in that the multi-stage feed pump has a pressure nozzle between two pressure stages, via which a partial flow of the sucked-in feed water into the low pressure part of the steam generator, while the residual current, in particular the main flow, is brought to a higher pressure and fed into the high-pressure part of the steam generator and that the minimum flow rates for the individual heating surfaces in the low and high pressure range are regulated by a control device. Speisepumpe zur Durchführung des Verfahrens nach Anspruch 1, dadurch gekennzeichnet, daß die mehrstufige Speisepumpe (19 mindestens zwei Druckstutzen (2, 3) in unterschiedlichen Druckstufen (4, 5) aufweist.Feed pump for carrying out the method according to claim 1, characterized in that the multi-stage feed pump (19) has at least two pressure ports (2, 3) in different pressure stages (4, 5). Speisepumpen nach Anspruch 2, dadurch gekennzeichnet, daß die Speisepumpe (1) eingehäusig ausgebildet ist (Fig.1).Feed pumps according to claim 2, characterized in that the feed pump (1) is formed in a housing (Fig. 1). Speisepumpen nach Anspruch 2, dadurch gekennzeichnet, daß die Speisepumpe (1) mindestens 2 hintereinander geschaltete, getrennte Stufen (4, 5) aufweist, die durch eine äußere Druckleitung (6) mit einer Abzweigleitung (7) in den Niederdruckbereich des Dampferzeugers, verbunden sind (Fig.2).Feed pumps according to claim 2, characterized in that the feed pump (1) has at least 2 successive, separate stages (4, 5) which are connected by an external pressure line (6) to a branch line (7) in the low pressure area of the steam generator (Fig.2). Speisepumpen nach Anspruch 4, dadurch gekennzeichnet, daß die einzelnen Stufen (4, 5) durch einen gemeinsamen Antrieb (8) verbunden sind.Feed pumps according to claim 4, characterized in that the individual stages (4, 5) are connected by a common drive (8).
EP93890249A 1992-12-24 1993-12-20 Method for feeding a multiple pressure steam generator and feed pump. Withdrawn EP0604390A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT257292 1992-12-24
AT2572/92 1992-12-24

Publications (2)

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EP0604390A2 true EP0604390A2 (en) 1994-06-29
EP0604390A3 EP0604390A3 (en) 1995-04-19

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EP93890249A Withdrawn EP0604390A3 (en) 1992-12-24 1993-12-20 Method for feeding a multiple pressure steam generator and feed pump.

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0984165A2 (en) * 1998-05-15 2000-03-08 Cryostar-France SA Pump
EP1612426A2 (en) * 2004-06-30 2006-01-04 KSB Aktiengesellschaft Controlled, energy efficient multi stage centrifugal pump with high pressure stage

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH169452A (en) * 1933-06-03 1934-05-31 Sulzer Ag Steam generator system with a high-pressure and a low-pressure part.
US2593058A (en) * 1949-04-19 1952-04-15 Continental Foundry And Machin Automatic recirculating control for pumps
US2720838A (en) * 1951-09-22 1955-10-18 Reconstruction Finance Corp Mechanism for protecting boiler feed pump
US3118386A (en) * 1964-01-21 Multi-stage centrifugal pump
US3204407A (en) * 1961-03-30 1965-09-07 Bbc Brown Boveri & Cie Combined gas turbine and steam turbine power plant
JPS55114837A (en) * 1979-02-27 1980-09-04 Hitachi Ltd Combined cycle power plant
JPS58217709A (en) * 1982-06-10 1983-12-17 Toshiba Corp Composite cycle power generating plant

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3118386A (en) * 1964-01-21 Multi-stage centrifugal pump
CH169452A (en) * 1933-06-03 1934-05-31 Sulzer Ag Steam generator system with a high-pressure and a low-pressure part.
US2593058A (en) * 1949-04-19 1952-04-15 Continental Foundry And Machin Automatic recirculating control for pumps
US2720838A (en) * 1951-09-22 1955-10-18 Reconstruction Finance Corp Mechanism for protecting boiler feed pump
US3204407A (en) * 1961-03-30 1965-09-07 Bbc Brown Boveri & Cie Combined gas turbine and steam turbine power plant
JPS55114837A (en) * 1979-02-27 1980-09-04 Hitachi Ltd Combined cycle power plant
JPS58217709A (en) * 1982-06-10 1983-12-17 Toshiba Corp Composite cycle power generating plant

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
ELEKTROTECHNIK UND INFORMATIONSTECHNIK, Bd.109, Nr.11, 1992, WIEN AT Seiten 558 - 569 HERBERT JERICHA 'W{rme-Cogeneration' *
PATENT ABSTRACTS OF JAPAN vol. 4, no. 167 (M-042) 19. November 1980 & JP-A-55 114 837 (TAKEUCHI KIYOSHI) 4. September 1980 *
PATENT ABSTRACTS OF JAPAN vol. 8, no. 69 (M-286) 31. März 1984 & JP-A-58 217 709 (TOKYO-SHIBAURA DENKI) 17. Dezember 1983 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0984165A2 (en) * 1998-05-15 2000-03-08 Cryostar-France SA Pump
EP0984165A3 (en) * 1998-05-15 2000-09-20 Cryostar-France SA Pump
US6167724B1 (en) 1998-05-15 2001-01-02 The Boc Group Plc Pump
EP1612426A2 (en) * 2004-06-30 2006-01-04 KSB Aktiengesellschaft Controlled, energy efficient multi stage centrifugal pump with high pressure stage
EP1612426A3 (en) * 2004-06-30 2009-06-24 KSB Aktiengesellschaft Controlled, energy efficient multi stage centrifugal pump with high pressure stage

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