EP0098631B1 - Réchauffeur d'eau d'alimentation à haute pression disposé verticalement à construction à collecteur avec une chambre de désurchauffe - Google Patents

Réchauffeur d'eau d'alimentation à haute pression disposé verticalement à construction à collecteur avec une chambre de désurchauffe Download PDF

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Publication number
EP0098631B1
EP0098631B1 EP83200847A EP83200847A EP0098631B1 EP 0098631 B1 EP0098631 B1 EP 0098631B1 EP 83200847 A EP83200847 A EP 83200847A EP 83200847 A EP83200847 A EP 83200847A EP 0098631 B1 EP0098631 B1 EP 0098631B1
Authority
EP
European Patent Office
Prior art keywords
support
feed water
support straps
preheater
guide channel
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
Application number
EP83200847A
Other languages
German (de)
English (en)
Other versions
EP0098631A1 (fr
Inventor
Günter Volks
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.)
BBC Brown Boveri AG Switzerland
Original Assignee
BBC Brown Boveri AG Switzerland
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 BBC Brown Boveri AG Switzerland filed Critical BBC Brown Boveri AG Switzerland
Priority to AT83200847T priority Critical patent/ATE13464T1/de
Publication of EP0098631A1 publication Critical patent/EP0098631A1/fr
Application granted granted Critical
Publication of EP0098631B1 publication Critical patent/EP0098631B1/fr
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/007—Auxiliary supports for elements
    • F28F9/013—Auxiliary supports for elements for tubes or tube-assemblies
    • F28F9/0132—Auxiliary supports for elements for tubes or tube-assemblies formed by slats, tie-rods, articulated or expandable rods
    • 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

Definitions

  • the invention relates to a standing high-pressure feed water preheater in collector design with a desuperheater housing according to the preamble of claim 1.
  • a desuperheater housing can be provided at a high inlet steam temperature in the area of the feed water outlet collector, in which the incoming steam gives off so much heat that it ends up, i.e. at the feed water inlet header is completely condensed.
  • the desuperheater housing forms a jacket which surrounds the preheater pipe coil in its last section before it flows into the feed water outlet collector in such a way that the steam has to flow longitudinally along the preheater pipes, as a result of which good heat transfer occurs in this section and the steam is cooled to the desired extent .
  • the steam emerges transversely to the adjacent strand of the preheater tubes in order to then condense completely in the remaining area of the preheater tube coil.
  • the support of the pipes should be designed in such a way that the flow cross-section in the support area is only moderately restricted, so that the steam speeds in the support area do not become too high, that the pipes are reliably prevented from jamming, but vibration excitation by the flow nevertheless does not occur May that the free expansion of the different components relative to each other is guaranteed in all operating conditions, and that the assembly of the pipe coils with the support elements and the jacket of the desuperheater is simple and does not require welding.
  • Fig. 1 shows the upper part of a high-pressure feed water preheater 1, in which the elements essential to the invention are located.
  • the condensate of the heating steam collects, which is fed through a steam inlet nozzle 2 in the boiler jacket 3 of the preheater.
  • the inlet connection 2 opens directly into the desuperheater housing 4, which leads the downward line 8 of the bundle of coils 7, indicated by the dash-dotted boundary, upwards to the pipes in the area of the feed water outlet collector 5 and with a guide channel 6 for the heating steam adjoining the desuperheater housing surrounds half of the height of this strand.
  • the guide channel 6 has an opening 9 directed towards the center of the preheating boiler, which opens into a steam distribution channel 10 which extends over the entire length of the line.
  • This distribution channel 10 has a rectangular cross section and is provided on the two narrow sides of its jacket with steam outlet openings 11, from which the heating steam flows transversely to the longitudinal extension of the coils, flows around them and, after corresponding cooling, becomes condensate, which is in the lower part, not shown of the preheater boiler accumulates.
  • the tube coil bundle here consists of only two strands, and the guide channel 13 extends over its entire length to the feed water inlet header 14.
  • the two described above differ in that the mutual position of the coils within the guide channel 6 and 13 is determined transversely to the longitudinal axis of the tubes. Outside the guide channel 6 or 13, the tube bundles are suspended or supported in the longitudinal direction in a conventional manner, an unimpeded thermal expansion of the tube bundle in the longitudinal direction being possible.
  • the support points within the guide channels for determining the mutual position of the coils transversely to their longitudinal direction are designated by 15 in FIGS. 1 and 2. 3 and 4, such a support point is shown in detail in a longitudinal section (FIG. 3) and in a cross section (FIG. 4).
  • Fig. 3 shows a part of the rear wall 16 of the jacket, which forms the guide channel 6 or 13.
  • the two lateral boundaries of the channel are composed of side wall parts 17, 18, the ends of which have outward flanging flanges 19, 20, and web plates 21, which are on the rear wall 16 and on the flanging flanges 19 , 20 are welded on.
  • Support crossbeams 22 made of U-section steel are welded to the inside of the web plates 21 and serve as stops for limiting the displacements of the upper support bands 24 and the lower support bands 23 as a result of thermal expansions of the coils 25.
  • these support beams 22 limit the position of the outermost pipe layers and thereby prevent them from rubbing against the side walls 17, 18.
  • the support bands 23, 24, one of which is shown in elevation or plan in FIGS. 5 and 6, have spacer tabs 26 which are obtained by punching and bending the rag outline out of the support band plane.
  • the support bands 23 of the lower level and 24 of the upper level are alternately offset by a pipe pitch, so that the free flow cross-section in each level is only limited by half the total cross-section that the support bands 23, 24 offer a support point transverse to the flow direction as a whole.
  • the first support band 23 of the lower level of the support point is between the first and second rows of coils
  • the second lower support band is between the third and fourth rows etc.
  • the support bands 24 are between the second and third, fourth and fifth row of coils, etc. are arranged.
  • the desuperheater housing is inserted with a layer of pipe coils and a support band, for example the lower one, 23, is inserted with the front wall not yet attached, which is congruent with the rear wall.
  • the second layer of coils and an upper support band 24 then the third layer with a lower shroud, etc. up to the top layer, whereupon the front wall, not shown, with the side wall parts 18, 19 and the web plates 21 and of course with the lateral boundary walls of the lower one box-shaped part of the desuperheater housing, which surrounds the collector 5, is tightly welded.
  • Time-consuming adaptation and welding work, as they are common with the known preheater types, are completely eliminated in the present type.
  • This mounting of the pipes at the support points is form-fitting in all directions transverse to the pipe axes and therefore vibration-proof, but at the same time permits free thermal expansion of the pipes in the longitudinal direction without risk of jamming.
  • the support bands 23, 24 adjust themselves during the first start-up due to their displaceability so that later they do not bump and slide back and forth in their bearings due to the thermal expansion of the pipes.
  • the support points act with their flanged flanges 19, 20 and the support cross members 22 as stiffeners of the guide channel 6. Instead of two levels of support bands, three or more of them can of course also be provided if the weight of the tube bundle or other circumstances so require. It is also possible to provide only one layer of support belts, although of course a loss of flow cross-section and thus a higher steam speed must be accepted.

Claims (2)

1. Réchauffeur (1) vertical d'eau d'alimentation à haute pression, du type à collecteurs avec une chambre de désurchauffe (4), qui, de façon étanche à la vapeur, entoure par une partie en forme de caisson un collecteur (5) de sortie de l'eau d'alimentation et, par une partie en forme de canal de guidage (6; 13), au moins une partie d'un faisceau (7) de tubes du réchauffeur qui y sont raccordés, dans lequel des zones d'appui (15) sont prévues dans le canal de guidage précité pour la fixation de la couche du faisceau de tubes du réchauffeur perpendiculairement à sa direction longitudinale, caractérisé en ce que les serpentins (25) du faisceau (7) de tubes du réchauffeur sont, dans la région des zones d'appui (15), fermement fixés perpendiculairement à leur axe longitudinal au moyen de bandes de support (23,24), en ce que le canal de guidage (6; 13) présente, dans la région des zones d'appui, des évasements ménagés dans deux parois latérales opposées et qui, vus de l'intérieur du canal de guidage, font saillie vers l'extérieur, lesdits évasements formant des butées pour limiter la couche des bandes de support (23, 24) dans le sens axial des faisceaux de tubes du réchauffeur, et en ce que les bandes de support (23, 24) présentent des pattes d'écartement (26).
2. Réchauffeur vertical d'eau d'alimentation à haute pression suivant la revendication 1, caractérisé en ce que l'évasement des zones d'appui (15) estformé par des brides à collerette (19,20) ménagées dans deux parois latérales opposées du canal de guidage (6; 13) ainsi que par une tôle d'âme (21 ) disposée chaque fois entre les brides à collerette (19, 20), en ce que, à la face intérieure de chaque tôle d'âme (21 ), est fixé un support transversal (22), en ce qu'au-dessus et en dessous du support transversal (22) sont disposées des couches de bandes de support (23, 24, respectivement), les bandes de support d'une couche étant décalées chaque fois d'une largeur de tube par rapport aux bandes de support de l'autre couche, en ce que les pattes d'écartement (26) des bandes de support (23, 24) font partie des bandes de support elles-mêmes mais sont saillantes perpendiculairement au plan de ces bandes de support, et en ce que la longueur des pattes d'écartement est au moins égale à la moitié du diamètre des tubes, mais est inférieure à ce diamètre.
EP83200847A 1982-06-30 1983-06-09 Réchauffeur d'eau d'alimentation à haute pression disposé verticalement à construction à collecteur avec une chambre de désurchauffe Expired EP0098631B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83200847T ATE13464T1 (de) 1982-06-30 1983-06-09 Stehender hochdruckspeisewasservorwaermer in sammlerbauweise mit einem enthitzergehaeuse.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH399182 1982-06-30
CH3991/82 1982-06-30

Publications (2)

Publication Number Publication Date
EP0098631A1 EP0098631A1 (fr) 1984-01-18
EP0098631B1 true EP0098631B1 (fr) 1985-05-22

Family

ID=4267761

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83200847A Expired EP0098631B1 (fr) 1982-06-30 1983-06-09 Réchauffeur d'eau d'alimentation à haute pression disposé verticalement à construction à collecteur avec une chambre de désurchauffe

Country Status (7)

Country Link
US (1) US4537157A (fr)
EP (1) EP0098631B1 (fr)
JP (1) JPS5915702A (fr)
AT (1) ATE13464T1 (fr)
AU (1) AU553271B2 (fr)
DE (1) DE3360205D1 (fr)
ZA (1) ZA834671B (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4847039A (en) * 1987-10-13 1989-07-11 Westinghouse Electric Corp. Steam chest crossties for improved turbine operations
US5762032A (en) * 1996-12-23 1998-06-09 Combustion Engineering, Inc. Field adjustable boltless stirrup
BRPI0507741A (pt) * 2004-02-17 2007-07-10 Modine Mfg Co trocador de calor recuperativo e sistema de processamento de combustìvel
JP5627740B2 (ja) * 2013-06-24 2014-11-19 三菱重工業株式会社 伝熱管の整管金物
US10605467B2 (en) * 2015-06-16 2020-03-31 Mitsubishi Electric Corporation Outdoor unit for air-conditioning apparatus and method of producing outdoor unit for air-conditioning apparatus

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1973533A (en) * 1931-01-22 1934-09-11 Standard Oil Co Furnace construction
DE930146C (de) * 1952-02-06 1955-07-11 Atlas Werke Ag Vorrichtung zum Halten von Rohren in Rohrbuendeln von Waermeaustauschern
JPS4220805Y1 (fr) * 1964-02-27 1967-12-04
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
DE2251866A1 (de) * 1972-10-23 1974-04-25 Balcke Maschbau Ag Vorrichtung zur halterung und distanzierung von rohren in einem waermetauscher
JPS5334637B2 (fr) * 1973-07-17 1978-09-21
US3998268A (en) * 1975-03-04 1976-12-21 Westinghouse Electric Corporation Locking device for staggered fin-tubes
FR2355191A1 (fr) * 1976-06-16 1978-01-13 Creusot Loire Dispositif de maintien d'une nappe de tubes a l'interieur d'une enceinte
US4344480A (en) * 1978-03-30 1982-08-17 Ecolaire Incorporated Support for heat exchange tubes
CH628410A5 (de) * 1978-05-31 1982-02-26 Bbc Brown Boveri & Cie Speisewasservorwaermer.
CH639745A5 (de) * 1978-08-18 1983-11-30 Bbc Brown Boveri & Cie Speisewasservorwaermer.
DE2840146A1 (de) * 1978-09-15 1980-03-27 Balcke Duerr Ag Vorrichtung zur halterung eines rohrbuendels
US4220199A (en) * 1979-01-02 1980-09-02 Combustion Engineering, Inc. Plate tube spacer structure
CA1132413A (fr) * 1980-03-10 1982-09-28 James H.D. Nickerson Ecran de plaque a tubes de generateur nucleaire de vapeur

Also Published As

Publication number Publication date
JPS5915702A (ja) 1984-01-26
US4537157A (en) 1985-08-27
AU553271B2 (en) 1986-07-10
ZA834671B (en) 1984-03-28
DE3360205D1 (en) 1985-06-27
ATE13464T1 (de) 1985-06-15
AU1616683A (en) 1984-01-05
EP0098631A1 (fr) 1984-01-18

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