US3608525A - Vapor generator and structural unit therefor - Google Patents

Vapor generator and structural unit therefor Download PDF

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Publication number
US3608525A
US3608525A US29423A US3608525DA US3608525A US 3608525 A US3608525 A US 3608525A US 29423 A US29423 A US 29423A US 3608525D A US3608525D A US 3608525DA US 3608525 A US3608525 A US 3608525A
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United States
Prior art keywords
vapor generator
pipe
set forth
structural units
structural unit
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
US29423A
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English (en)
Inventor
Harendra Nath Sharan
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
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Filing date
Publication date
Application filed by Sulzer AG filed Critical Sulzer AG
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Publication of US3608525A publication Critical patent/US3608525A/en
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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
    • F22B37/001—Steam generators built-up from pre-fabricated elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B29/00—Steam boilers of forced-flow type
    • F22B29/06—Steam boilers of forced-flow type of once-through type, i.e. built-up from tubes receiving water at one end and delivering superheated steam at the other end of the tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B29/00—Steam boilers of forced-flow type
    • F22B29/06—Steam boilers of forced-flow type of once-through type, i.e. built-up from tubes receiving water at one end and delivering superheated steam at the other end of the tubes
    • F22B29/061—Construction of tube walls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B29/00—Steam boilers of forced-flow type
    • F22B29/06—Steam boilers of forced-flow type of once-through type, i.e. built-up from tubes receiving water at one end and delivering superheated steam at the other end of the tubes
    • F22B29/061—Construction of tube walls
    • F22B29/062—Construction of tube walls involving vertically-disposed water tubes
    • 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
    • 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
    • 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
    • F22B37/202—Suspension and securing arrangements for contact heating surfaces

Definitions

  • This invention relates to a vapor generator. More particularly, this invention relates to structural units for the construc- 'tion of a vapor generator.
  • Vapor generators have been known wherein a wall pipe system formed from vertical interwelded pipes defines a space having a cross section with two sides parallel to each other.
  • the wall pipe system is further constructed so that a flue gas can flow in a vertical direction through the pipe enclosed space and so that at least one combustion chamber can extend into the lower end of the space with heating surfaces in the form of pipe nests above the combustion chamber.
  • the pipe nests which form the heating surfaces and the walls defining the space for the flow of flue gas have been manufactured individually in a workshop and then assembled at a building site. However, this has led to relatively large fabrication and erection costs as well as relatively long construction periods. I
  • the invention provides a vapor generator which is constructed of a number of prefabricated units.
  • Each prefabricated unit includes a pipe nest in which the pipe members are coiled in a serpentine or meander fashion to extend substantially horizontally in parallel relation.
  • the two opposite ends of each unit are also formed so as to define a section of a wall of the vapor generator while the individual ends of the pipe members of the pipe nest extend through and are welded in gastight manner to the wall part.
  • the prefabricated units are stacked and interconnected in the field so as to form a wall pipe system of vertical interwelded pipes with two end walls of substantially gastight construction.
  • a pair of sidewalls of interconnected pipes are then interconnected to the stacked units so as to define a flue space for the flow of a flue gas.
  • a combustion chamber is then mounted in the lower end of the generator to provide for a flow of flue gas.
  • One advantage of the invention is that different parts of a vapor generator namely the pipe nests and the pipe walls can be prefabricated in a workshop into units which can be assembled at a building site in a rapid and economical manner. Further, prefabrication of a plurality of structural units can be carried out simultaneously. Both of these features in combination reduce the building period in addition to lowering costs. A further reduction of costs is obtained by virtue of the fact that an increased proportion of the welding work is performed in the workshop where, since the welding positions are more readily acceptable, such welding operations can be performed and inspected more accurately than on the installation site. Very substantial advantages are obtained if the invention is applied to vapor generators in which the cross section of the space traversed by the flue gases is at least twice as large in the direction of the pipe members as the distance between parallel walls.
  • the invention also provides a method for the production of a vapor generator, characterized in that the structural units are prefabricated in a workshop, are then transported to a building site, assembled and welded to each other.
  • a vapor generator according to the invention has more welding seams than vapor generators manufactured in a conventional manner, the vapor generator according to the invention is less costly because the welding operations on the building site are confined to a smaller number of welding seams than is the case in the conventional construction. Accordingly, the proportion of welding work performed in the workshopis therefore greater than the increase in the number of welding seams.
  • FIG. 1 illustrates a simplified perspective view of a vapor generator according to the invention
  • FIG. 2 illustrates a perspective view to a large scale than FIG. 1 of a structural unit of the vapor generator of FIG. 1;
  • FIG. 3 illustrates a vertical section view of part of the structural unit of FIG. 2; and FIG. 4 is a side elevation view of an end of the structural unit of FIG. 2.
  • the vapor generator 2 substantially comprises a front wall 3, a rear wall 4 disposed in parallel to the front wall 3, and two sidewalls 5 (of which only one is shown) which join the front wall 3 and the rear wall 4.
  • the four walls 3-S are formed from vertical pipes 6 which are interwelded in gastight manner and extend at the upper ends into headers l3, l4, 15 associated with one wall each.
  • the lower ends of the pipes 6 are connected to corresponding manifolds disposed below the floor (not shown). All the wall pipes 6 are connected as preheater heating surfaces and define a'space for the passage of a flue gas.
  • a number of turbulence muffle burners 8, e.g. five, are disposed in the lower part of each of the front wall 3 and rear wall to extend into the space defined by the four walls 35.
  • the preheated fresh air is conv eyed via a duct 21, a fresh air blower 22 and two distribution ducts 23 and 24 to the muffle burners 8.
  • the upper relative cold end of the vapor generator 2 is formed into a sheet metal hood 7, which is connected to the duct 30 in order to direct the flue gases from the vapor generator 2 into the duct 30.
  • the vapor generator 2 is constructed from four structural units 50, 53, 56 and 59.
  • the lowermost structural unit 50 comprises a pipe nest 10 constructed in this case of a plurality of pipe panels which are disposed next to each other in the flue gas flow, and of a wall part forming part of the two sidewalls 5.
  • the pipe ends of the pipe nest 10 extend through the wall part (not shown) and are connected to a manifold 51 and a header 52, respectively, which are disposed outside the space through which the flue gases flow and in parallel to the sidewall 5.
  • the pipe nest 10 of the structural unit 50 forms an evaporator heating surface.
  • the next higher structural unit 53 whose pipe nest 11 forms a superheater surface, is of the same basic construction as the lowermost unit 50.
  • the only difference in this case being that the manifold 48 and the header 49 are disposed on two opposite sides and accordingly two wall parts, each forming part of the two sidewalls, are incorporated in the structural unit 53.
  • the structural unit 53 contains the superheater pipe nest 11, comprising six pipe panels disposed in parallel next to each other. Each pipe panel is constructed from four pipes curved into a serpentine or meander pattern and all of which extend along the panel plane.
  • One set of pipe ends 11' (FIG. 3) of the pipe nest 11 extend through the lefthand wall part 35 which forms a part of one sidewall 5 (FIG. I).
  • the pipes 6 of the wall parts 35 are offset in pairs and in opposite orientations in the zone in which they extend through the pipe wall and webs 60, to which the pipe ends 11' of the pipe nest are welded, are welded between the pipes 6.
  • the pipe nest 11 is thus mounted by means of the webs 60 on the wall part 35 and the correspondingly constructed wall part of the oppositely disposed sidewall 5.
  • tubular supporting members 45 In order to suspend the pipe panels from the support structure, tubular supporting members 45 extend between the pipe panels and are distributed over the length of the pipe nest.
  • the tubular supporting members 45 extend upwardly and downwardly beyond the height of the pipe panels and are mounted by welding on the pipe panels.
  • each structural unit in order to facilitate transportation from the workshop to the building site, each structural unit is provided with a transportation frame comprising four longitudinal girders 37, 38, 39 and 40 (FIG. 3), frame members 41 for joining the girders in pairs as well as a plurality of transverse members 42 e.g. l6 forjoining the longitudinal girders.
  • the two sidewall parts 35 are mounted on the external transverse member 42 by means of U-bolts 43, as indicated in FIGS. 3 and 4.
  • the remaining transverse members 42 are disposed to lie adjacent the extensions of the tubular supporting member 45 joined to the pipe panels.
  • the ends of these tubular supporting members 45 are also secured by means of U- bolts on the transverse members 42.
  • the dimensions of the structural unit are so selected that, when assembled with the transportation frame, the unit can be transported on railway trucks.
  • the units After transportation of the structural units to the building site, the units are hoisted on the supporting structure already erected and are mounted thereon or under a structural unit already installed namely by welding of the two wall parts 35 and the tubular supporting member 45.
  • the transportation structure is then removed and may be reused in the workshop.
  • the front wall 3 and the rear wall 4 which, in accordance with the size of the vapor generator are constructed in one or more parts which may also be prefabricated in the workshop, are welded at the building site to the assembled structural units.
  • the walls 3, 4 and 5 are then externally covered with sheet metal panels which are also joined in gastight manner.
  • the conventional buckstays (not shown) are then mounted. Any buckstays which may be required for the sidewalls 5 may be mounted on the sidewall parts during prefabrication in the workshop.
  • the burners 8 are mounted.
  • the length of the structural unit as measured in the direction of the pipe members of the pipe nests is equal to the width of the vapor generator and the width of the structural units as measured at right angles to the parallel walls 3 and 4, is equal to the depth of the vapor generator.
  • the length of each structural unit may be equal to half the width of the vapor generator.
  • a structural unit for a vapor generator comprising a pipe nest having a plurality of pipe panels extending in a substantially vertical plane in parallel relation, and at least one wall part including a plurality of vertically disposed interconnected pipes; each of said panels having at least one pipe wound in a meander fashion with one end thereof extending through said wall part and being secured thereto in gastight relation.
  • a structural unit as set forth in claim 1 which further includes a manifold connected in common to said ends extending through said wall part.
  • Avapor generator comprisinfi a wall pipe system of vertica y disposed interconnected pipes defining a space of a cross section with two parallel sides for the flow of a flue gas;
  • each unit including a pipe nest having a plurality of vertically upstanding pipe panels extending horizontally parallel to said sides and at least one wall pan including a plurality of vertically disposed pipes forming a part of said wall pipe system to define a further side of the space, each of said panels having at least one end ofa pipe thereofextending through said wall part in gastight relation.
  • each structural unit is of a length approximately equal to the width of the vapor generator.
  • each structural unit is of a length equal to approximately one-half the width of the vapor generator.
  • each structural unit is ofa width perpendicular to said parallel sides approximately equal to the depth of the vapor generator.
  • a method of constructing a vapor generator comprising the steps of prefabricating a plurality of structural units defining heating surfaces for the vapor generator and at least a part of the sidewalls of the vapor generator,
  • a method as set forth in claim 10 which further comprises the steps of prefabricating at least a pair of pipe walls, transporting the pipe walls to the building site and welding the pipe walls to the stacked structural units in parallel relation to the structural units to define a space between the pipe walls and sidewalls for the flow of a flue gas past the heating surfaces.
  • a vapor gencrator as set forth in claim 5 wherein at least some of said structural units each have a pair of said wall parts on opposite ends and said panels have at least one end of a pipe thereof extending through each said respective wall part in gastight relation.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
US29423A 1969-04-17 1970-04-17 Vapor generator and structural unit therefor Expired - Lifetime US3608525A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH580569A CH506751A (de) 1969-04-17 1969-04-17 Dampferzeuger mit aus vertikalen, verschweissten Rohren gebildeter Wandberohrung

Publications (1)

Publication Number Publication Date
US3608525A true US3608525A (en) 1971-09-28

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Family Applications (1)

Application Number Title Priority Date Filing Date
US29423A Expired - Lifetime US3608525A (en) 1969-04-17 1970-04-17 Vapor generator and structural unit therefor

Country Status (8)

Country Link
US (1) US3608525A (fr)
BE (1) BE748871A (fr)
CH (1) CH506751A (fr)
DE (1) DE1923296B1 (fr)
FR (1) FR2039251A1 (fr)
GB (1) GB1248371A (fr)
NL (1) NL146593B (fr)
SE (1) SE358721B (fr)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3858556A (en) * 1972-11-14 1975-01-07 Vladimir Dmitrievich Terentiev Power and process plant
US3971345A (en) * 1975-07-07 1976-07-27 Deltak Corporation Coal fired package boiler
US5339891A (en) * 1993-07-15 1994-08-23 The Babcock & Wilcox Company Modular arrangement for heat exchanger units
US5341869A (en) * 1993-07-15 1994-08-30 The Babcock & Wilcox Company Top supported high temperature heating surface module with permanent structural frame
US5722354A (en) * 1995-12-08 1998-03-03 Db Riley, Inc. Heat recovery steam generating apparatus
US5816200A (en) * 1996-12-23 1998-10-06 Combustion Engineering, Inc. Windbox with integral truss support and air admission, fuel admission and ignitor modules
US20030025333A1 (en) * 2001-07-19 2003-02-06 Kabushiki Kaisha Toshiba Turbine-generator equipment and installation method thereof
WO2006032556A1 (fr) * 2004-09-23 2006-03-30 Siemens Aktiengesellschaft Generateur de vapeur en continu chauffe a l'aide d'un combustible fossile
US20060175040A1 (en) * 2003-07-30 2006-08-10 Babcoak-Hitachi Kabushiki Kaisha Heat transfer tube panel module and method of constructing exhaust heat recovery boiler using the module
US20110000445A1 (en) * 2007-11-10 2011-01-06 English John R Package boiler having steam generating units in tandem
US20120067303A1 (en) * 2009-04-09 2012-03-22 Foster Wheeler Energia Oy Circulating Fluidized Bed Boiler
US20120079996A1 (en) * 2009-04-09 2012-04-05 Foster Wheeler Energia Oy Thermal Power Plant
ES2531427R1 (es) * 2011-06-23 2015-03-24 Shangai Boiler Works, Ltd. Dispositivo de montaje de colector multifuncional
EP3751195A1 (fr) * 2019-06-10 2020-12-16 Valmet Technologies Oy Agencement de faisceau de support destiné à supporter un conduit de gaz de combustion

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0469306B1 (fr) * 1990-07-30 1994-08-31 Waagner-Biro Aktiengesellschaft Installation d'une surface de chauffe d'un générateur de vapeur dans un canal de gas d'échappement

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2803227A (en) * 1953-11-03 1957-08-20 Combustion Eng Radiant steam heater construction and operation
US2952975A (en) * 1957-11-15 1960-09-20 Babcock & Wilcox Co Vapor generating and superheating unit
US3030937A (en) * 1958-01-10 1962-04-24 Combustion Eng Furnace wall and support
US3081748A (en) * 1958-12-19 1963-03-19 Babcock & Wilcox Co Forced flow fluid heating unit

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB877665A (en) * 1959-03-26 1961-09-20 Walther & Cie Ag Improvements in forced draught boilers

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2803227A (en) * 1953-11-03 1957-08-20 Combustion Eng Radiant steam heater construction and operation
US2952975A (en) * 1957-11-15 1960-09-20 Babcock & Wilcox Co Vapor generating and superheating unit
US3030937A (en) * 1958-01-10 1962-04-24 Combustion Eng Furnace wall and support
US3081748A (en) * 1958-12-19 1963-03-19 Babcock & Wilcox Co Forced flow fluid heating unit

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3858556A (en) * 1972-11-14 1975-01-07 Vladimir Dmitrievich Terentiev Power and process plant
US3971345A (en) * 1975-07-07 1976-07-27 Deltak Corporation Coal fired package boiler
US5339891A (en) * 1993-07-15 1994-08-23 The Babcock & Wilcox Company Modular arrangement for heat exchanger units
US5341869A (en) * 1993-07-15 1994-08-30 The Babcock & Wilcox Company Top supported high temperature heating surface module with permanent structural frame
US5722354A (en) * 1995-12-08 1998-03-03 Db Riley, Inc. Heat recovery steam generating apparatus
US5816200A (en) * 1996-12-23 1998-10-06 Combustion Engineering, Inc. Windbox with integral truss support and air admission, fuel admission and ignitor modules
US7256511B2 (en) * 2001-07-19 2007-08-14 Kabushiki Kaisha Toshiba Turbine-generator equipment and installation method thereof
US20030025333A1 (en) * 2001-07-19 2003-02-06 Kabushiki Kaisha Toshiba Turbine-generator equipment and installation method thereof
US7569946B2 (en) 2001-07-19 2009-08-04 Kabushiki Kaisha Toshiba Turbine-generator equipment and installation method thereof
US7275503B2 (en) * 2003-07-30 2007-10-02 Babcock-Hitachi Kabushiki Kaisha Heat transfer tube panel module and method of constructing exhaust heat recovery boiler using the module
US20060175040A1 (en) * 2003-07-30 2006-08-10 Babcoak-Hitachi Kabushiki Kaisha Heat transfer tube panel module and method of constructing exhaust heat recovery boiler using the module
US20080257282A1 (en) * 2004-09-23 2008-10-23 Martin Effert Fossil-Fuel Heated Continuous Steam Generator
WO2006032556A1 (fr) * 2004-09-23 2006-03-30 Siemens Aktiengesellschaft Generateur de vapeur en continu chauffe a l'aide d'un combustible fossile
US7878157B2 (en) 2004-09-23 2011-02-01 Siemens Aktiengesellschaft Fossil-fuel heated continuous steam generator
US20110000445A1 (en) * 2007-11-10 2011-01-06 English John R Package boiler having steam generating units in tandem
US8281752B2 (en) 2007-11-10 2012-10-09 English John R Package boiler having steam generating units in tandem
US20120079996A1 (en) * 2009-04-09 2012-04-05 Foster Wheeler Energia Oy Thermal Power Plant
US20120067303A1 (en) * 2009-04-09 2012-03-22 Foster Wheeler Energia Oy Circulating Fluidized Bed Boiler
US9016243B2 (en) * 2009-04-09 2015-04-28 Foster Wheeler Energia Oy Circulating fluidized bed boiler
US9151496B2 (en) * 2009-04-09 2015-10-06 Amec Foster Wheeler Energia Oy Thermal power plant
ES2531427R1 (es) * 2011-06-23 2015-03-24 Shangai Boiler Works, Ltd. Dispositivo de montaje de colector multifuncional
EP3751195A1 (fr) * 2019-06-10 2020-12-16 Valmet Technologies Oy Agencement de faisceau de support destiné à supporter un conduit de gaz de combustion
US11162675B2 (en) 2019-06-10 2021-11-02 Valmet Technologies Oy Supporting beam arrangement for supporting a flue gas duct

Also Published As

Publication number Publication date
BE748871A (fr) 1970-10-13
NL6907557A (fr) 1970-10-20
FR2039251A1 (fr) 1971-01-15
DE1923296B1 (de) 1970-10-29
NL146593B (nl) 1975-07-15
CH506751A (de) 1971-04-30
SE358721B (fr) 1973-08-06
GB1248371A (en) 1971-09-29

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