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WO1998015776A1 - Prechauffeur destine a un systeme de turbine a vapeur - Google Patents

Prechauffeur destine a un systeme de turbine a vapeur Download PDF

Info

Publication number
WO1998015776A1
WO1998015776A1 PCT/EP1997/005492 EP9705492W WO9815776A1 WO 1998015776 A1 WO1998015776 A1 WO 1998015776A1 EP 9705492 W EP9705492 W EP 9705492W WO 9815776 A1 WO9815776 A1 WO 9815776A1
Authority
WO
WIPO (PCT)
Prior art keywords
preheater
steam turbine
steam
support frame
preheater unit
Prior art date
Application number
PCT/EP1997/005492
Other languages
English (en)
Inventor
Wolfgang Henselak
Volker Meinhardt
Gerald Twarloh
Michael Wurm
Original Assignee
Siemens 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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO1998015776A1 publication Critical patent/WO1998015776A1/fr

Links

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
    • F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
    • F22D1/32—Feed-water heaters, i.e. economisers or like preheaters arranged to be heated by steam, e.g. bled from turbines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2200/00—Mathematical features
    • F05B2200/30—Mathematical features miscellaneous
    • F05B2200/32—Mathematical features miscellaneous even

Definitions

  • the invention relates to a preheater unit for a steam turbine system.
  • a steam turbine In a steam power plant, typically a steam turbine is combined with a condenser to make a steam turbine system located in a machine house or turbine hall.
  • the condenser communicates on the outlet side through a feedwater path with a steam generator, which in turn is connected on its outlet side to the steam turbine.
  • a steam generator In order to increase the total efficiency of such a steam power plant, it is customary to preheat the feedwater before feeding it into the steam generator. That kind of feedwater preheating may be provided for various pressure ranges of the feedwater, especially a low-pressure and/or a high-pressure range.
  • the steam power plant typically has a number of preheater elements that are each connected into the feedwater path on the secondary side.
  • each of the preheater elements can be fed a heating medium.
  • the heating medium may, for instance, be bled steam from the steam turbine or flue gas from a flue gas conduit of the steam generator.
  • the preheater elements are typically adapted for a specific task, for instance as a function of the pressure range of the feedwater to be preheated, and are accordingly constructed differently. As a rule, a separate disposition of each preheater element in the immediate vicinity of components to be joined to it is provided upon its installation. However, in that kind of construction the expense for assembly, especially at the installation site of the steam power plant, is especially high.
  • a preheater unit for a steam turbine system comprising one support frame; and a number of preheater elements disposed in common in the one support frame.
  • the invention is based on the concept that the expense of assembly for the preheater unit and thus for the entire steam power plant can be kept especially low by providing a high degree of prefabrication .
  • An especially high degree of prefabrication is attainable in turn by suitably modularizing the components.
  • the term "modularly constructed" or “module” should be understood in this case to mean a connectable, transportable and premountable component .
  • One suitable way of modularizing for a high degree of prefabrication is to combine a plurality of preheater elements into one common module. This can be accomplished by placing the preheater elements in one support frame that is common to them all.
  • the support frame is symmetrically structured to receive an even number of preheater elements.
  • the preheater elements are disposed in pairs one above the other in the support frame.
  • the preheater elements include a low-pressure preheater and/or a high-pressure preheater of the preheater unit.
  • the support frame has a parking surface.
  • a top cover plate of the support frame may be constructed in the form of a table top.
  • Such a table top can be used in particular during maintenance or repair, for instance for a steam turbine connected to the preheater unit, as a parking surface for tools or turbine parts.
  • the advantages attained with the invention reside particularly in the fact that by combining a number of preheater elements in one support frame that is common to them all, an especially high degree of prefabrication of the preheater unit is attainable.
  • the preheater unit can thus be planned to be an integrated unit and can be constructed especially space-savingly.
  • the preheater unit which is prefabricated as a module is moreover testable for defects before being shipped to its location for use, so that it can be put into operation on site especially quickly and reliably .
  • Fig. 2 is a side-elevational view of the steam turbine system of Fig. 1, as seen along a line II-II in the direction of the arrows.
  • the steam turbine system 1 is part of a non-illustrated coal- fired steam power plant having a high-pressure preheater, in the form of a module 9, which is likewise disposed flush with the ground on the side of the steam turbine 2 facing the condenser 4.
  • the steam turbine system 1 is connected to a once-through steam generator of the steam power plant in a non-illustrated manner.
  • One such once-through steam generator is described, for instance, in co-pending U.S. Patent Application Serial No. (Attorney's Docket No. 5796) filed concurrently with the instant application, entitled "Modular Boiler" and having the same assignee.
  • the steam turbine 2, the condenser 4, the preheater unit 6, the generator 8 and the module 9 are disposed in a common power house or turbine hall 10.
  • the support frame 14 of the preheater unit 6 includes a table top constructed as a parking surface 20.
  • the table top is usable particularly when the steam turbine 2 is undergoing maintenance or repair, as a parking surface 20 for tools or turbine parts .

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Abstract

Ce préchauffeur, destiné à un système de turbine à vapeur, comprend un certain nombre d'éléments préchauffants (15), disposés dans un cadre de support (14) qui est le même pour tous. On peut installer ce préchauffeur d'une façon tout à fait simple et conçue en outre pour économiser de l'espace.
PCT/EP1997/005492 1996-10-08 1997-10-07 Prechauffeur destine a un systeme de turbine a vapeur WO1998015776A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US72718696A 1996-10-08 1996-10-08
US08/727,186 1996-10-08

Publications (1)

Publication Number Publication Date
WO1998015776A1 true WO1998015776A1 (fr) 1998-04-16

Family

ID=24921679

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1997/005492 WO1998015776A1 (fr) 1996-10-08 1997-10-07 Prechauffeur destine a un systeme de turbine a vapeur

Country Status (2)

Country Link
TW (1) TW360738B (fr)
WO (1) WO1998015776A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1502389A (fr) * 1966-11-29 1967-11-18 C Aug Schmidt Sohne G M B H Ma Réchauffeur d'eau d'alimentation à haute pression
GB1157557A (en) * 1966-06-06 1969-07-09 Bbc Brown Boveri & Cie Boiler Feed Water Preheater.
US4592416A (en) * 1985-04-29 1986-06-03 The Air Preheater Company, Inc. Modular tubular heat exchanger
EP0415314A1 (fr) * 1989-08-28 1991-03-06 Gec Alsthom Sa Condenseur en béton pour turbine à échappement axial et turbine munie d'un tel condenseur

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1157557A (en) * 1966-06-06 1969-07-09 Bbc Brown Boveri & Cie Boiler Feed Water Preheater.
FR1502389A (fr) * 1966-11-29 1967-11-18 C Aug Schmidt Sohne G M B H Ma Réchauffeur d'eau d'alimentation à haute pression
US4592416A (en) * 1985-04-29 1986-06-03 The Air Preheater Company, Inc. Modular tubular heat exchanger
EP0415314A1 (fr) * 1989-08-28 1991-03-06 Gec Alsthom Sa Condenseur en béton pour turbine à échappement axial et turbine munie d'un tel condenseur

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
C.BOLARD: "ALSTHOM DESIGN FOR TURBINE HALL OF NUCLEAR POWER PLANTS", ALSTHOM REVIEW, no. 6, 1986, PARIS FR, pages 3 - 20, XP002053060 *

Also Published As

Publication number Publication date
TW360738B (en) 1999-06-11

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