EP0137119B1 - Générateur de vapeur - Google Patents

Générateur de vapeur Download PDF

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Publication number
EP0137119B1
EP0137119B1 EP84107398A EP84107398A EP0137119B1 EP 0137119 B1 EP0137119 B1 EP 0137119B1 EP 84107398 A EP84107398 A EP 84107398A EP 84107398 A EP84107398 A EP 84107398A EP 0137119 B1 EP0137119 B1 EP 0137119B1
Authority
EP
European Patent Office
Prior art keywords
wall
tie member
vapour generator
links
connecting element
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
EP84107398A
Other languages
German (de)
English (en)
Other versions
EP0137119A3 (en
EP0137119A2 (fr
Inventor
Heinz Ammann
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.)
Sulzer AG
Original Assignee
Gebrueder Sulzer AG
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 Gebrueder Sulzer AG filed Critical Gebrueder Sulzer AG
Publication of EP0137119A2 publication Critical patent/EP0137119A2/fr
Publication of EP0137119A3 publication Critical patent/EP0137119A3/de
Application granted granted Critical
Publication of EP0137119B1 publication Critical patent/EP0137119B1/fr
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/10—Water tubes; Accessories therefor
    • F22B37/20—Supporting arrangements, e.g. for securing water-tube sets
    • F22B37/208—Backstay arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/10—Water tubes; Accessories therefor
    • F22B37/14—Supply mains, e.g. rising mains, down-comers, in connection with water tubes
    • F22B37/146—Tube arrangements for ash hoppers and grates and for combustion chambers of the cyclone or similar type out of the flues
    • 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

Definitions

  • the invention relates to a steam generator according to the preamble of claim 1.
  • the belt supports have the purpose of protecting the surrounding walls against deformation, in particular preventing bulging, when deflagrations occur in the combustion chamber of the steam generator.
  • Such a steam generator is known from DE-A-1 526928.
  • this steam generator which extends in the vertical direction, four belt carriers enclosing it are each arranged in the same height plane. In each area in which two adjacent walls meet to form a corner, this requires a special constructive design of the connection of the drawstrings with the associated belt support ends, so that the tabs are not in the way of one another and their freedom of movement is guaranteed.
  • the tabs are designed as yoke-like frames, the two frames and the two drawstrings being sized differently in the area of a corner, so that one drawstring with the frame connected to it can extend through the other frame.
  • the design effort is considerably increased, which also has a corresponding disadvantageous effect on the storage of the connecting elements.
  • the invention has for its object to improve the steam generator of the type mentioned in such a way that with the same good absorption of the deformation forces resulting from deflagrations by the belt supports, the design effort for the connections of these supports to the steam generator tube walls is substantially reduced.
  • this object is achieved by the features of the characterizing part of claim 1.
  • the offset arrangement makes it possible to make the dimensions for the drawstrings and the tabs of the same size for all connection points with the belt support ends, which considerably simplifies the production and the storage of these parts. Since the belt carriers remain close to each other despite the slight misalignment, the absorption of the deformation forces by the belt carriers remains as good as in the known steam generator.
  • the steam generator 1 consists of vertical wall tubes 2, which are welded together tightly by means of webs 3.
  • the wall tubes 2 and the webs 3 form four walls, of which two walls 6 always run vertically and two vertical walls 7 in the lower region of the steam generator 1 are bent obliquely inwards.
  • the lower part of the steam generator 1 thus forms a funnel 5, the lower four edges of which delimit an elongated opening, not visible in the drawing, at which the wall tubes 2 are bent horizontally outwards and then open into four horizontal collectors 4.
  • the webs 3 only extend as far as the elongated opening of the funnel 5.
  • the oblique course of the lower part of the walls 7 creates an oblique edge in the area of the funnel 5.
  • the steam generator 1 extends up to connections, not shown here, with a support structure on which it is suspended.
  • a cooling medium flows from the collectors 4 and 4 'up to other collectors, not shown. Also flowing from bottom to top are hot combustion gases, which come from burners arranged on the circumference of the steam generator 1 and not shown, which emit heat to the cooling medium flowing in the wall pipes 2. Solid and / or liquid secretions from the combustion gases, such as ashes, fall down inside the steam generator 1 and are guided by the funnel 5 to the elongated opening through which they steam generator 1 leave. Due to the heating and cooling during operation, the walls 6 and 7 expand or contract, both in the vertical and in the horizontal direction.
  • each belt carrier is connected to the adjacent walls of the wall running parallel to it, so that the outward bending stresses of a wall are transmitted to the belt carrier supported on it and passed on from it via its ends to the neighboring walls, essentially as a tensile stress .
  • the tensile stress is absorbed by the neighboring walls with the help of tension bands 21 and 31, respectively.
  • FIGS. 2 and 3 An embodiment of the invention with a belt carrier 20 ', which runs parallel to an oblique part of one of the walls 7 in FIG. 1 and perpendicular to the wall tubes 2 forming this wall part, is shown in FIGS. 2 and 3.
  • the wall tubes 2 emerging from the vertical wall 6 as a result of the edge running obliquely between it and the wall 7 are used to form extensions of the vertical wall 6 to the outside.
  • parts of the wall itself become tension bands 21.
  • sheet metal parts 22 are welded firmly as a connecting element at fastening points 41, which are the same and planar among themselves and are arranged parallel to one another.
  • the sheet metal parts 22 run vertically both on the vertical wall 6 and on the inclined wall part of the wall 7 and are arranged in pairs symmetrically to the vertical wall 6; Two sheet metal parts lying one above the other are connected by means of tab bolts 25 running perpendicular to them and parallel to the inclined part of the wall 7. On each tab bolt 25 there are two tabs 24 cut from sheet metal, which are arranged between two of the sheet metal parts connected by a tab bolt 25 and abut against them, and are separated from one another by a spacer tube 26 arranged concentrically with the tab bolt 25. The tabs 24 extend into the area of the belt carrier 20 'and there they are in turn placed on a tab bolt 25'.
  • the belt carrier 20 ' has an H-profile, the web of which is perpendicular to the wall 7.
  • supports 15 are fastened, each of which is connected to a support profile 16 fastened to the belt support 20 'by means of a pin 17.
  • the pin 17 is firmly connected to the support 15, but slides in a slot on the support profile 16, so that the belt carrier 20 'can be displaced in its longitudinal direction with respect to the wall 7, as a result of which different thermal expansions between the belt carrier 20 and the wall 7 are possible.
  • the belt carrier 20 is reinforced by two support plates 13 running parallel to its web and a closing plate 13 'running perpendicular thereto; Sheet metal guides 12 are welded in parallel to the sheets 13.
  • a pivotable element 10 is attached to each side of the sheet metal guides 12, two pivotable elements 10 being connected to one another by means of a pivot pin 11 passing through the sheet metal guide 12.
  • the ends of the straps 24 on the belt support side run so that the tab bolts 25 'each pivotably connect two pivotable elements 10 and two tabs 24 to one another and thereby the sheet metal guide 12 penetrates a slot such that the pivotable elements 10 are freely pivotable within a certain angular range.
  • the wall pipes 2 which continue outside the vertical wall 6 are bent around the tab connections described in order to leave them freely movable and accessible.
  • Fig. 3 shows the tab connection in its most unfavorable position, i. H. when starting the steam generator when the walls are still cold, so that the tabs 24 run slightly obliquely with respect to the wall 6.
  • the belt carrier 20 loads the wall 6 in such a way that there is a slight bending stress in this wall 6 .
  • the bending moment is small, however, and their existence is relatively short, with the added fact that during the heating period only exceptionally, e.g. B. by explosion inside the steam generator, the belt carrier 20 passes a maximum load on the wall 6.
  • the tension band 21 being additionally reinforced by means of reinforcement plates 27 which are attached directly as extensions of the plate parts 22.
  • the embodiment according to FIGS. 4, 5 and 6 relates to a belt carrier 30, not shown in these figures, attached to one of the vertical walls 6 in the area of the funnel 5, at point B in FIG. 1 Area of the funnel 5 inclined wall 7 the neighboring wall with which a drawstring 31 firmly together is welded.
  • the connecting element 32 consists of two flat, vertically running sheet metal pieces 32 'and of two flat, horizontally running sheet metal pieces 32 ".
  • the two vertical sheet metal pieces 32' have the same shape, but are arranged in mirror images next to one another and are inserted in vertical slots in the tension band 31, with which they are each welded symmetrically along fastening points 41.
  • Two essentially vertical bolt screws 40 extend through the horizontal sheet metal pieces 32 ", to each of which one end of a tab 34 is pivotally attached. The other end of each tab 34 is pivotable with the belt carrier 30 in a similar manner Connected way, as in the execution Example is shown in FIGS. and 3.
  • the neighboring wall 7 detaches from the tension band 31 in the area of the connection element 32 and then runs in the direction of the interior of the steam generator 1 around the connection element 32 in such a way that there is sufficient free space for attaching the vertical sheet metal pieces 32 ′ to the tension band 31.
  • the belt carrier 30 transmits a force by means of the tabs 34 and the bolts 40 to the horizontal sheet metal pieces 32 "of the connecting element 32, which in turn transmits the force to the downstream vertical sheet pieces 32 ', from where the Force is finally transmitted to the wall 7 by means of the tension band 31.
  • the tabs 34 and the fastening points 41 are arranged symmetrically to a central plane of the tension band 31 running parallel to the wall 7, the tension band 31 is only subjected to tension in normal operation If the middle plane is very close to the wall pipes 2, the resulting moment from the tensile force times the distance between the tension band middle plane and the pipes 2 is negligible, and the wall 7 is also practically only subjected to tension. This situation would of course be the same if instead of the two Tabs 34 would be provided only one tab per end portion of the belt carrier 30, s as long as the longitudinal axis of the tab 34 would run in the central plane of the drawstring 31.
  • a connecting element 33 consists of a substantially horizontal cylindrical Body that has three diameters in a row. In the area of the largest diameter, at one end of the connecting element 33, there is a diametrical slot, in which the drawstring 31 is inserted and along the edges of which the drawstring 31 is welded together with the connecting element 33 (seams 41). In the area of the other end of the connecting element 33, this has its smallest diameter and a thread.
  • an intermediate part 36 is pivotably arranged, which is axially fixed between two washers 38 and 39 by a nut 37 screwed onto the thread of the connecting element 33.
  • the nut 37 is secured by means of a welding point 42.
  • the intermediate part 36 consists of a cube 36 'with a bore parallel to four of its sides and two flat sheet metal parts 36 "welded on the opposite side of the cube parallel to the bore. Each sheet metal part 36" has six bores on which the welding takes place is performed with the cube 36.
  • the tabs 35 are also pivotally connected to the belt carrier 30 by means of screw bolts 40 (not shown), the pivot axes of all screw bolts running parallel to one another.
  • the tension band 31 is welded to the wall 7.
  • the tubes 2 of the wall 7 have moved away from the drawstring 31 in the direction of the interior of the steam generator 1 and thereby create space for the connecting element 33 to be plugged onto the drawstring 31.
  • the connecting element 33 becomes hollow executed, about the same wall thickness as the tension band 31 to avoid thermal stress due to large material accumulations and at the same time to improve the welding conditions.
  • the force transmission from the belt carrier 30 to the wall 7 takes place according to FIGS. 7, 8 and 9 in the same way as in the previous exemplary embodiments, but a tension-free rotation of the tabs 35 and thus of the belt carrier 30 about the longitudinal axis of the connecting element 33 is ensured .
  • This additional degree of freedom contributes significantly to the avoidance of tension and to a reduction in assembly effort.
  • the routing of the tubes 2 around the connecting element 33 is substantially smaller than in the case of FIGS. 4, 5 and 6 around the connecting element 32.
  • FIGS. 4, 5 and 6 or 7, 8 and 9 can also be used at the positions A 'and B' of FIG. 1. The only difference is that the center plane of the drawstring runs vertically at points A 'and B'.
  • the sheet metal pieces 32 'and 32 "obviously do not have to be perpendicular to one another. Their angle to one another and their angle with respect to the tension band 31 can be chosen freely; only one piece of sheet metal 32' and 32" can be chosen. or more than two sheet metal pieces 32 'or 32 "can be provided, which do not necessarily have to be parallel to one another and can also have different shapes, for example uneven.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Drying Of Solid Materials (AREA)

Claims (7)

1. Générateur de vapeur (1) comportant des tubes de paroi (2) assemblés entre eux de manière rigide, parcourus par un fluide, formant des parois d'enceinte (6, 7), comportant pour chaque paroi d'enceinte (6, 7) plusieurs poutrelles (30) et (20, 20') sensiblement parallèles à la paroi d'enceinte (6, 7) correspondante et perpendiculaires à la direction longitudinale du générateur de vapeur (1), réparties sur la longueur du générateur de vapeur 1, chaque poutrelle (30, 20, 20') étant assemblée à chacune de ses deux extrémités par un tirant (respectivement 31 et 21) à une paroi d'enceinte voisine (6 et 7), au moins une éclisse ou au moins une paire d'éclisses (24, 34, 35) dont les axes de pivotement sont parallèles à la paroi d'enceinte (6, 7) associée à la poutrelle correspondante, et forment un angle droit par rapport à la direction longitudinale de la poutrelle, étant prévue entre le tirant (21, 31) et l'extrémité de la poutrelle (30, 20, 20') et dans le cas où l'on a recours à une éclisse, son axe de pivotement côté tirant étant situé dans le plan médian du tirant (21, 31) et dans le cas où l'on a recours à une paire d'éclisses (24, 34, 35), leurs axes de pivotement côté tirant étant symétriques par rapport au plan médian du tirant (31, 21), caractérisé en ce que dans la zone dans laquelle deux parois d'enceinte (6, 7) juxtaposées forment un angle, les poutrelles (30, 20, 20') disposées à peu près à la même hauteur avec leurs tirants (31, 21) et éclisses (24, 34, 35) sont décalées dans la direction longitudinale du générateur de vapeur (1).
2. Générateur de vapeur selon la revendication 1, comportant un élément de liaison (32, 33) recevant l'axe de pivotement côté tirant, caractérisé en ce que dans la zone de l'élément de liaison (32, 33), une partie des tubes (2) formant la paroi d'enceinte (7) contourne l'élément de liaison, détachée du tirant (21, 31).
3. Générateur de vapeur selon la revendication 1, comportant une trémie disposée à l'extrémité inférieure du générateur de vapeur vertical, caractérisé en ce que la paroi d'enceinte (6) verticale de la trémie fait saillie vers l'extérieur par rapport à sa paroi oblique et forme un tirant (21), et est assemblée aux extrémités côté tirant des éclisses (24).
4. Générateur de vapeur selon la revendication 2, caractérisé en ce que l'élément de liaison (32) est constitué d'au moins une pièce en tôle.
5. Générateur de vapeur selon la revendication 4, caractérisé en ce que l'élément de liaison (32) est constitué d'au moins deux pièces en tôle se croisant, disposées l'une derrière l'autre, dans la direction des éclisses (34).
6. Générateur de vapeur selon la revendication 2, caractérisé en ce que l'élément de liaison (33) est en forme de boulon à son extrémité tournée vers le tirant (31) et présente à son autre extrémité assemblée à l'éclisse (35), un élément intermédiaire (36) tournant autour de l'axe du boulon.
7. Générateur de vapeur selon la revendication 1, comportant une paire d'éclisses, caractérisé en ce que les extrémités côté poutrelle de chaque paire d'éclisses s'articulent sur un levier de pivotement (10) dont l'axe de pivotement est parallèle et symétrique aux axes de pivotement des éclisses (24).
EP84107398A 1983-09-08 1984-06-27 Générateur de vapeur Expired EP0137119B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH4903/83 1983-09-08
CH490383 1983-09-08

Publications (3)

Publication Number Publication Date
EP0137119A2 EP0137119A2 (fr) 1985-04-17
EP0137119A3 EP0137119A3 (en) 1985-12-11
EP0137119B1 true EP0137119B1 (fr) 1988-08-24

Family

ID=4284552

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84107398A Expired EP0137119B1 (fr) 1983-09-08 1984-06-27 Générateur de vapeur

Country Status (6)

Country Link
US (1) US4576120A (fr)
EP (1) EP0137119B1 (fr)
JP (1) JPS6064104A (fr)
CA (1) CA1247950A (fr)
DE (1) DE3473637D1 (fr)
PL (1) PL143422B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4017102C1 (en) * 1990-05-28 1991-08-01 L. & C. Steinmueller Gmbh, 5270 Gummersbach, De Steam generator with tube register walls - has two beam support straps secured to adjacent wall part, gripping over beam longitudinal direction

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1016532B (zh) * 1985-09-23 1992-05-06 劳舍兄弟有限公司 燃烧矿物燃料的蒸汽发生器
SE8605200D0 (sv) * 1986-12-03 1986-12-03 Asea Stal Ab Kraftanleggning med ett beddkerl med forbrenning i en fluidiserad bedd
US4721069A (en) * 1987-06-19 1988-01-26 The Babcock & Wilcox Company Termination for boiler casing expansion element
SE466417B (sv) * 1990-06-15 1992-02-10 Abb Carbon Ab Vraengningshinder foer spantbalkar i ramverk foer vertikalt monterade baeddkaerl
AT401287B (de) * 1994-10-17 1996-07-25 Austrian Energy & Environment Kühlflächenauskleidung
US6793013B2 (en) 2003-01-09 2004-09-21 Foster Wheeler Energy Corporation Polygonal heat exchange chamber including a tapered portion lined with water tube panels and method of lining a tapered portion of a polygonal heat exchange chamber with such panels
EP2026000A1 (fr) * 2007-08-10 2009-02-18 Siemens Aktiengesellschaft Générateur de vapeur
AU2009205434B2 (en) * 2008-01-14 2013-06-20 The Babcock & Wilcox Company Heat exchanger
JO3344B1 (ar) * 2008-10-24 2019-03-13 Babcock & Wilcox Co مبادل حراري لمستقبل شمسي مجمع في المشغل

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3007455A (en) * 1958-01-03 1961-11-07 Babcock & Wilcox Co Vapor generator wall and buckstay arrangement
US3357408A (en) * 1965-08-19 1967-12-12 Babcock & Wilcox Co Vapor generating apparatus
US3277870A (en) * 1965-12-30 1966-10-11 Foster Wheeler Corp Buckstay arrangement for vapor generators and the like
DE1526928A1 (de) * 1966-05-21 1970-02-12 Steinmueller Gmbh L & C Abstuetzung von Kesselumfassungswaenden
DE2055803A1 (de) * 1970-11-13 1972-05-18 Kraftwerk Union Ag Großkessel mit gasdicht verschweißten Feuerraumwänden
AT317927B (de) * 1971-10-13 1974-09-25 Waagner Biro Ag Bandage für ebene Wände von Dampferzeugern
US3814063A (en) * 1973-07-13 1974-06-04 Babcock & Wilcox Ltd Support of tube walls
US4240234A (en) * 1978-12-20 1980-12-23 Foster Wheeler Energy Corporation Adjustable buckstay system for vapor generators or the like

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4017102C1 (en) * 1990-05-28 1991-08-01 L. & C. Steinmueller Gmbh, 5270 Gummersbach, De Steam generator with tube register walls - has two beam support straps secured to adjacent wall part, gripping over beam longitudinal direction

Also Published As

Publication number Publication date
PL249089A1 (en) 1985-04-09
JPS6064104A (ja) 1985-04-12
CA1247950A (fr) 1989-01-03
EP0137119A3 (en) 1985-12-11
PL143422B1 (en) 1988-02-29
EP0137119A2 (fr) 1985-04-17
US4576120A (en) 1986-03-18
DE3473637D1 (en) 1988-09-29

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