EP0137119A2 - Générateur de vapeur - Google Patents

Générateur de vapeur Download PDF

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Publication number
EP0137119A2
EP0137119A2 EP84107398A EP84107398A EP0137119A2 EP 0137119 A2 EP0137119 A2 EP 0137119A2 EP 84107398 A EP84107398 A EP 84107398A EP 84107398 A EP84107398 A EP 84107398A EP 0137119 A2 EP0137119 A2 EP 0137119A2
Authority
EP
European Patent Office
Prior art keywords
wall
connecting element
heat exchanger
tabs
drawstring
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.)
Granted
Application number
EP84107398A
Other languages
German (de)
English (en)
Other versions
EP0137119A3 (en
EP0137119B1 (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
Sulzer AG
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 Sulzer AG, Gebrueder Sulzer AG filed Critical 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 heat exchanger, preferably a steam generator, according to the preamble of claim 1.
  • Such a heat exchanger acting as a steam generator in which a belt carrier is connected at each of its two ends by means of a drawstring fastened to the Nachoar wall, a connecting element and a tab are connected to the neighboring wall.
  • the drawstring is firmly connected to the adjacent wall on one side and carries a connecting element on the opposite side, consisting of parallel sheet metal pieces with bores arranged one behind the other in the longitudinal direction of the steam generator, through which the drawstring-side bolts of the tabs run essentially parallel to the wall.
  • a torque occurs in this known embodiment that is equal to the force transmitted by the tab times the distance between the drawbar-side pin axis and the drawstring. This moment tries to lift part of the drawstring from the wall or bulge the wall outwards, and the additional loading Long-term stress leads to fatigue in the area of the edge between the wall and the neighboring wall.
  • a reinforcement of the neighboring wall in the area of the drawstring or a more favorable design of the edge between the wall and the neighboring wall leads to very complex solutions. As a result of the thermal stresses that occur as a result of material accumulation, these solutions are also unsatisfactory.
  • Claim 4 represents a particularly favorable design of the connecting element.
  • the angle between the mutually parallel axes of rotation of the bracket and the central plane of the tension band can be freely selected.
  • the arrangement of more than one tab between an end portion of the belt carrier and the tension band favors the transmission of larger forces.
  • the tension band, and thus the neighboring wall is freed from the additional bending loads caused by possible deformations of the belt carrier perpendicular to the wall by the features of claim 8.
  • 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 run only up to the elongated opening of the funnel 5. Due to the oblique course of the lower part the walls 7 are formed in the area of the funnel 5 an oblique edge.
  • 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 hot flow from bottom to top, l disposed from the periphery of the steam generator and burners derived Ver not shown - combustion gases to supply heat to the flowing in the wall tubes 2 cooling medium. 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 leave the steam generator 1. 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 are transmitted to the wall supported by a belt carrier and from there via its end parts to the neighboring walls, essentially as a tensile load. to get redirected.
  • the tensile stress is absorbed by the afterbands with the help of tension bands 21 and 31, respectively.
  • FIGS. 2 and 3 An embodiment of the invention relating to a belt carrier 20, which runs parallel to an inclined part of one of the walls 7 in FIG. 1 and perpendicular to the wall tubes 2 forming this wall 7, 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.
  • a connecting element 22 is firmly welded to fastening points 41, which connecting element 22 is formed from the same, flat, mutually parallel plate parts .
  • the sheet metal parts forming the connecting element 22 run vertically both on the vertical wall 6 and on the inclined wall part the wall 7 and are arranged in pairs symmetrically to the vertical wall 6; Two sheet metal parts lying one on top of the other are connected by means of tab bolts 25 running perpendicular to them and parallel to the inclined part of the edge 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 bear against them, and are separated from one another by a spacer tube 26 arranged concentrically with the tab bolt 25. 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 fixedly connected to the support 15, but slides in a slot on the support profile 16, so that the belt carrier 20 is displaceable 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 perpendicularly 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 tabs 24 on the belt carrier side run between the pivotable elements 10 and the sheet metal guide 12 lying therebetween, 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 so 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.e. 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. With increasing warming of the wall 7, this stretches, and when normal operation is reached, the tabs 24 run parallel to the wall 6. From start-up until normal operation is achieved, the belt carrier 20 loads the wall 6 in such a way that a slight bending stress occurs 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. due to an explosion inside the steam generator, the belt carrier 20 transmits a maximum load to the wall 6. The arrangement is therefore permissible in any case, the tension band 21 being additionally reinforced by means of reinforcement plates 27, which are attached directly as extensions of the connecting elements 22.
  • 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 vertical Slits of the tension band 31, with which they are welded together symmetrically along fastening points 41.
  • the horizontal sheet metal pieces 32 "both have the same, approximately rectangular shape and are inserted in parallel one above the other in horizontal slots of the vertical sheet metal pieces 32 ', with which they are welded together in a similar manner as the vertical sheet metal pieces 32' with the drawstring 31.
  • the horizontal Sheet metal pieces 32 "extend two substantially vertically extending stud bolts 40, to each of which one end of a tab 34 is pivotally attached.
  • the other end of each tab 34 is pivotally connected to the belt carrier 30 in a similar manner as shown in the embodiment of FIGS. 2 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 If the belt carrier 30 is stressed by the wall 6, it 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 transferred to the wall 7 by means of the tension band 31. Because the tabs 34 and the fastening points 35 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 very close to the
  • Wall pipes 2 is arranged, the resulting moment from the tensile force times.
  • the distance between the tension band center plane and the tubes 2 is negligible, and the wall 7 is practically also only subjected to tension. This matter would of course be the same if on Instead of the two tabs 34, only one tab would be provided per end part of the belt carrier 30, as long as the longitudinal axis of the tab 34 would run in the central plane of the tension band 31.
  • a connecting element 33 consists essentially of a horizontal
  • 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.
  • On the sheet metal pieces 36 'two vertical bolts 40 are also attached, on which two parallel H-profile tabs 35 are pivotally arranged.
  • the tabs 35 are also by means of screws, not shown Bolt 4.0 pivotally connected to the belt support 30, wherein the pivot axes of all bolts are parallel to each other.
  • the drawstring 31 is welded to the wall 7.
  • the wall 7 lifts off the tension band 31 in the direction of the interior of the steam generator 1 and thereby creates space for plugging the connecting element 33 onto the tension band 31.
  • the connecting element 33 is made hollow, for example having the same wall thickness as the drawstring 31 in order to avoid thermal stresses 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 necessary bending of the wall 7 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 angles to one another and their angle with respect to the tension band 31 can be freely chosen; only one sheet piece 32' and 32 can be used "Also more than two sheet metal pieces 32 'or 32" are provided, which do not necessarily have to be parallel to one another and can also have different shapes, for example uneven.

Landscapes

  • 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)
EP84107398A 1983-09-08 1984-06-27 Générateur de vapeur Expired EP0137119B1 (fr)

Applications Claiming Priority (2)

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

Publications (3)

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

Families Citing this family (10)

* 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
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
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
NZ586755A (en) * 2008-01-14 2013-02-22 Babcock & Wilcox Power Generat A heat exchanger comprises heat transfer surfaces and upper and lower structural members where a portion of the heat transfer surface extends between and is fluidically connected to the structural members
JO3344B1 (ar) * 2008-10-24 2019-03-13 Babcock & Wilcox Co مبادل حراري لمستقبل شمسي مجمع في المشغل

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1526928A1 (de) * 1966-05-21 1970-02-12 Steinmueller Gmbh L & C Abstuetzung von Kesselumfassungswaenden
FR2114575A5 (fr) * 1970-11-13 1972-06-30 Kraftwerk Union Ag
FR2157436A5 (fr) * 1971-10-13 1973-06-01 Waagner Biro Ag
US4240234A (en) * 1978-12-20 1980-12-23 Foster Wheeler Energy Corporation Adjustable buckstay system for vapor generators or the like

Family Cites Families (4)

* 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
US3814063A (en) * 1973-07-13 1974-06-04 Babcock & Wilcox Ltd Support of tube walls

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1526928A1 (de) * 1966-05-21 1970-02-12 Steinmueller Gmbh L & C Abstuetzung von Kesselumfassungswaenden
FR2114575A5 (fr) * 1970-11-13 1972-06-30 Kraftwerk Union Ag
FR2157436A5 (fr) * 1971-10-13 1973-06-01 Waagner Biro Ag
US4240234A (en) * 1978-12-20 1980-12-23 Foster Wheeler Energy Corporation Adjustable buckstay system for vapor generators or the like

Also Published As

Publication number Publication date
US4576120A (en) 1986-03-18
PL249089A1 (en) 1985-04-09
CA1247950A (fr) 1989-01-03
EP0137119A3 (en) 1985-12-11
PL143422B1 (en) 1988-02-29
DE3473637D1 (en) 1988-09-29
JPS6064104A (ja) 1985-04-12
EP0137119B1 (fr) 1988-08-24

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