EP0679836B1 - Cycle à vapeur - Google Patents

Cycle à vapeur Download PDF

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Publication number
EP0679836B1
EP0679836B1 EP95105993A EP95105993A EP0679836B1 EP 0679836 B1 EP0679836 B1 EP 0679836B1 EP 95105993 A EP95105993 A EP 95105993A EP 95105993 A EP95105993 A EP 95105993A EP 0679836 B1 EP0679836 B1 EP 0679836B1
Authority
EP
European Patent Office
Prior art keywords
pressure
stage
pump
steam
feed
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
Application number
EP95105993A
Other languages
German (de)
English (en)
Other versions
EP0679836A1 (fr
Inventor
Nabil Rachid
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.)
ABB Patent GmbH
Original Assignee
ABB Patent 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 ABB Patent GmbH filed Critical ABB Patent GmbH
Publication of EP0679836A1 publication Critical patent/EP0679836A1/fr
Application granted granted Critical
Publication of EP0679836B1 publication Critical patent/EP0679836B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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

Definitions

  • the invention relates to the steam cycle of a power plant with Feed water tank, with a feed water backing pump and a feed water main pump, with low and high pressure preheaters, with a steam generator and with a steam turbine, from which bleed steam can be removed for heating the preheater is, as well as with pipes and fittings.
  • the feed water backing pump and the Main pump provided a single drive motor, the drive of the backing pump takes place directly, while the main pump via a gearbox and an adjustable clutch or one installed between the electric drive and the pump Transmission control clutch is applied.
  • this transmission control coupling takes place at the same time as the power transmission Speed increase.
  • Such transmission control couplings are generally as flow couplings trained in which the regulation of the speed by change the respective oil filling is possible.
  • the object of the invention is a technical one Specify solution in which the slip losses are kept to a minimum will.
  • the feed water main pump comprises two stages, namely a first and a second stage, that the first stage of the feed water main pump is rigidly coupled to a drive and is provided as the first pressure stage for feeding the high-pressure preheater and that the second stage is coupled to the drive of the first stage by means of a flow coupling and is provided as the second pressure stage for feeding the steam generator.
  • each stage of the main pump represents a separate pump.
  • the first pump which is preferably acted upon by the drive motor of the feed water backing pump via a step-up gear, runs constantly at a constant high speed (approx.
  • the feed pressure of the first pressure stage is greater than the pressure of the high pressure preheater for heating Bleed steam and lower than the pressure of the second pressure stage.
  • the feed pressure of the first pressure stage is advantageously about 1/3 to 1/2 of the feed pressure of the second pressure stage, which according to a further embodiment of the invention produces the same feed water pressure as a conventional single-stage Feed water main pump.
  • Another advantage that directly affects the constructive Design of the water vapor cycle consists of that all components between the first and the second Pump level of the feed water main pump not on the conventional one Plants required zero delivery pressure respectively Response pressure of the boiler safety valve must, but a design for the zero delivery pressure is sufficient the first pump stage, which is about 1/3 to 2/5 of the conventional one Design pressure. This reduction in design pressure is particularly important for the design the high-pressure preheater, which due to the reduced Stresses of smaller wall thicknesses and thus easier processing conditions surrender.
  • Each of the two feed water pump stations 16 has one of an electric drive motor 18 fore pump 20 and one from the same drive motor 18 via a transmission gear 22 acted upon main pump 24.
  • the main pump 24 in turn has two stages, namely one first stage 26 and a second stage 28 formed, the feed pressure is greater than that of the first stage 26 and the feed pressure corresponds to a conventional feed water main pump.
  • the second stage 28th While the first stage 26 is rigid with the transmission gear 22 is connected connected slip-free, the second stage 28th with the interposition of a control clutch 30 from the same drive train acts like the first stage 26.
  • the output of the first stage 26 of the feed water main pump 24 is flow to the input of a high pressure preheater 32 switched by means of a turbine line, not shown here supplied bleed steam is heated.
  • a high pressure preheater 32 switched by means of a turbine line, not shown here supplied bleed steam is heated.
  • the high pressure preheater 32 with the input is on the output side the second stage 28 of the feed water main pump 24, which is the preheated feed water in the high pressure preheater 32 in a steam generator not shown here promotes, the related wiring harness with "boiler" is designated.
  • the first are according to the state of the art and the second stage 26, 28 of the feed water main pump 24 on the output side each connected to a minimum quantity system.

Landscapes

  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Turbines (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Jet Pumps And Other Pumps (AREA)

Claims (6)

  1. Circuit de vapeur d'eau (10) d'une centrale, avec un réservoir d'eau d'alimentation (12), avec une pompe de gavage (20) à eau d'alimentation et une pompe principale (24) à eau d'alimentation, avec des réchauffeurs basse et haute pression (32), avec un générateur de vapeur et avec une turbine à vapeur au niveau de laquelle de la vapeur de soutirage est prélevée pour chauffer les réchauffeurs (32), ainsi qu'avec des conduites (14) et des vannes, caractérisé par le fait que la pompe principale (24) à eau d'alimentation est divisée en un premier étage (26) et un second étage (28), que le premier étage (26) de la pompe principale (24) à eau d'alimentation est couplé rigidement à un moyen d'entraínement et forme un premier étage de pression pour l'alimentation du réchauffeur haute pression (32) et que le second étage (28) est couplé à l'entraínement par l'intermédiaire d'un accouplement variable (30) et forme un second étage de pression pour l'alimentation du générateur de vapeur.
  2. Circuit de vapeur d'eau selon la revendication 1, caractérisé par le fait que la pression d'alimentation du premier étage de pression (26) est supérieure à la pression de la vapeur de soutirage dans le réchauffeur haute pression (32) et inférieure à la pression du second étage de pression (28).
  3. Circuit de vapeur d'eau selon une des revendications précédentes, caractérisé par le fait que la pression d'alimentation du second étage de pression (28) est environ 1/2 à 2/3 de la pression du premier étage de pression et correspond à la pression d'une pompe principale à eau d'alimentation monoétage courante.
  4. Circuit de vapeur d'eau selon une des revendications précédentes, caractérisé par le fait que le réchauffeur haute pression (32), du point de vue de l'épaisseur de ses parois, est conçu pour résister aux sollicitations résultant de la pression de refoulement zéro du premier étage de pression.
  5. Circuit de vapeur d'eau selon une des revendications précédentes, caractérisé par le fait qu'il est prévu comme moyen d'entraínement un moteur d'entraínement (18) auquel le premier étage de pression (26) est relié en interposant un multiplicateur de vitesse.
  6. Circuit de vapeur d'eau selon une des revendications précédentes, caractérisé par le fait que le second étage de pression (28) est relié avec possibilité de variation de la vitesse à la ligne d'entraínement du premier étage de pression (26) en interposant un accouplement hydraulique .
EP95105993A 1994-04-27 1995-04-21 Cycle à vapeur Expired - Lifetime EP0679836B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4414709A DE4414709A1 (de) 1994-04-27 1994-04-27 Wasserdampfkreislauf
DE4414709 1994-04-27

Publications (2)

Publication Number Publication Date
EP0679836A1 EP0679836A1 (fr) 1995-11-02
EP0679836B1 true EP0679836B1 (fr) 1998-08-19

Family

ID=6516584

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95105993A Expired - Lifetime EP0679836B1 (fr) 1994-04-27 1995-04-21 Cycle à vapeur

Country Status (3)

Country Link
EP (1) EP0679836B1 (fr)
AT (1) ATE169993T1 (fr)
DE (2) DE4414709A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102353037A (zh) * 2011-08-30 2012-02-15 上海申能临港燃机发电有限公司 联合循环发电机组的给水系统

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998015778A1 (fr) * 1996-10-08 1998-04-16 Siemens Aktiengesellschaft Circuit d'eau d'alimentation et d'eau condensee destine a une centrale thermique a vapeur, et centrale thermique comprenant un tel circuit

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2225453A (en) * 1939-10-03 1940-12-17 Worthington Pump & Mach Corp Boiler feed system
BE533619A (fr) * 1953-11-25
DE2740530C3 (de) * 1977-09-08 1980-03-13 Kraftwerk Union Ag, 4330 Muelheim Einrichtung zur Vermeidung von speisewasserseitigen Thermoschocks im Hochdruckteil von Dampfkraftwerken
DE4138288A1 (de) * 1991-11-21 1993-06-09 Siemens Ag, 8000 Muenchen, De Dampfkraftwerk
DE4302486A1 (de) * 1993-01-29 1994-08-04 Abb Patent Gmbh Verfahren und Vorrichtung zum Betrieb des Wasser-Dampf-Kreislaufs eines Wärmekraftwerkes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102353037A (zh) * 2011-08-30 2012-02-15 上海申能临港燃机发电有限公司 联合循环发电机组的给水系统

Also Published As

Publication number Publication date
DE59503227D1 (de) 1998-09-24
DE4414709A1 (de) 1995-11-02
EP0679836A1 (fr) 1995-11-02
ATE169993T1 (de) 1998-09-15

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