US3396707A - Gas passes - Google Patents

Gas passes Download PDF

Info

Publication number
US3396707A
US3396707A US575157A US57515766A US3396707A US 3396707 A US3396707 A US 3396707A US 575157 A US575157 A US 575157A US 57515766 A US57515766 A US 57515766A US 3396707 A US3396707 A US 3396707A
Authority
US
United States
Prior art keywords
gas
pass
tubes
walls
headers
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
US575157A
Other languages
English (en)
Inventor
Bagley Roy
Richard H Evans
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.)
Babcock International Ltd
Original Assignee
Babcock and Wilcox Ltd
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 Babcock and Wilcox Ltd filed Critical Babcock and Wilcox Ltd
Application granted granted Critical
Publication of US3396707A publication Critical patent/US3396707A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F22B37/62—Component parts or details of steam boilers specially adapted for steam boilers of forced-flow type
    • F22B37/64—Mounting of, or supporting arrangements for, tube units
    • F22B37/645—Mounting of, or supporting arrangements for, tube units involving upper vertically-disposed water tubes and lower horizontally- or helically disposed water tubes

Definitions

  • the headers in opposite walls are provided with conduits extending across the top of the gas-pass which discharge fluid from the opposite headers into a collector located parallel to and intermediate the headers in opposite walls.
  • the conduits from opposite headers are tied together to resist forces urging the opposite headers apart.
  • This invention relates to gas passes and enables portions of the fluid flow path to be utilized as structural components of the gas pass.
  • a gas pass having at the upper ends of opposite walls collector means into which tubes lining the walls discharge, conduits extending towards each other from the collector means across the top of the gas pass, and means tying the conduits together to resist forces urging apart the collector means between which they extend.
  • a gas pass having at the upper ends of each of two opposite walls a plurality of headers into each of which a group of wall lining tubes, connected for parallel flow of working fluid, discharge, each header being connected for fluid flow to a conduit extending at the top of the gas pass towards a header at the opposite side of the gas pass, and the conduits that extend towards each other from opposite headers are connected together to resist forces urging the headers apart.
  • FIGURE 1 shows somewhat diagrammatically a vertical section through a once-through, forced-flow vapour generator and superheater;
  • FIGURES 2a and 2b form a diagram showing the walls of the upright furnace chamber of this generator developed into a single plane
  • FIGURE 3 is a perspective diagram illustrating certain details of the side walls and the top of the upright gas pass of the generator.
  • the once-through, forced-flow vapour generator and superheating unit illustrated in FIGURES 1 and 2 includes a furnace chamber 1 forming the lower end of an upright gas pass 2 and fired by thirty circular burners, such as 3, in each of the front and rear walls, 4 and 5, of the gas pass 2.
  • the lower end of the gas pass 2 ends in a hopper bottom 6, the front and rear walls 4a and 5a of which are convergent whilst the side walls are parallel.
  • a lateral gas pass 7 containing reheater tubes 7a extends from the upper end of the rear wall 5 and discharges combustion gases into the downpass 9 containing economiser tubes 9a.
  • the walls of the gas pass 2 are lined in a manner that is described in our co-pending application S.N. 574,974, up to the level of the inlet to the lateral gas pass 7 by tubes that extend generally lat- 3,396,707 Patented Aug. 13, 1968 erally but rise generally continuously.
  • each of these tubes is connected to a vertical tube, the vertical tubes in the front and side walls being arranged side-by-side in groups 10.
  • Each group 10 of tubes is provided with a header 14 and each header 14 connected by means of a conduit 14A to a collector or receiver 15, extending centrally across the top of the gas pass.
  • the spaces between the groups 10 are filled by further groups 11 of vertical tubes in a manner that is described more fully in our co-pending application S.N. 574,974, the tubes of the groups 11 being supplied with fluid from the collector 15.
  • the front and side walls are suspended by means including vertical tension members 12 lying outside the boundary walls of the gas pass 2, being connected at their lower ends to the walls and supported by springs 13 at their upper ends.
  • Each tension member 12 associated with the front and side walls lies alongside one of the groups 10 of vertical tubes.
  • Similar tension members are associated with the rear wall in a manner described more fully in our co-pending application S.N. 574,974.
  • the support straps extend alongside the tube lining internally of lagging and are supported by a system of buckstays outside the lagging.
  • the system includes horizontal buckstays 17 connected to the transversely extending tubes of the tube lying so that the tubes themselves withstand the pressures urging opposed buckstays apart.
  • Platens of U-shaped superheater tubes 15 are suspended in the upper end of the pass, depending from beams :16 connected to certain of the springs 13.
  • each of the tube lengths included in a group 10 discharges into a corresponding header 14.
  • a collector, or receiver, 15 extends from front to back across the middle of the top of the gas pass 2 and each of the headers 14 at the upper ends of the side walls is connected to the collector 15 by means of a conduit 14A extending horizontally for the most part but cranked upwardly at 1413 for connection to the collector 15.
  • each conduit 14A extending towards the collector 15 from one side of the gas pass is aligned with a conduit 14A extending towards the collector 15 from the other side of the gas pass.
  • Aligned conduits 14A are tied together by means of ties 19 in the regions 14B in which they are cranked.
  • each tie 19 is a pair of metal strips each welded at one end to one conduit 14A and at the other end to an aligned conduit 14A.
  • each tie is in the form of a pair of metal strips clamped by means of bolts to aligned conduits 14A.
  • conduits 14A that extend along the top of the pass and are tied together to form a brace resisting the effects of gas pressure inside the gas pass 2 tending to urge the side walls apart.
  • the walls of the gas pass will, of course, be reinforced by buckstays extending laterally along them.
  • headers of the tubes in the groups 10 may also be connected to the collector 15 and fluid from the collector 15 distributed through ducts 15A to the inlet headers of the tubes in groups 11.
  • connections may be replaced or augmented by connections between conduits extending towards each other from the headers into which the tubes of the groups 11 discharge.
  • a gas-pass defined by walls having tubes therein, headers positioned in the upper portion of opposite walls of said gas-pass, means for passing fluid through the tubes in said opposite walls into said headers, conduits extending toward each other from each of said headers across the top of said gas-pass, a collector positioned parallel to and between the opposite wall headers of said gaspass to receive the fluid from said conduits, each of said conduits having an end portion bent substantially perpendicular to the remaining portion of the conduit and opening into said collector and means tying the bent end portions of said conduits together to resist forces urging apart the headers in said opposite walls.
  • a gas-pass according to claim 1 wherein a plurality of headers are positioned in the upper portion of each of said opposite walls, at least one conduit extends across the top of said gas-pass from each header toward a cor- 4 a .1 and the bent end portion of corresponding conduits opening to said collector are in side-by-side relationship.
  • a gas-pass as claimed in claim 2 in which the tying means is efiected by members welded between the upper 5 end bent portions of the corresponding conduits.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Treating Waste Gases (AREA)
US575157A 1965-08-27 1966-08-25 Gas passes Expired - Lifetime US3396707A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3704665 1965-08-27

Publications (1)

Publication Number Publication Date
US3396707A true US3396707A (en) 1968-08-13

Family

ID=10393306

Family Applications (1)

Application Number Title Priority Date Filing Date
US575157A Expired - Lifetime US3396707A (en) 1965-08-27 1966-08-25 Gas passes

Country Status (3)

Country Link
US (1) US3396707A (US07922777-20110412-C00004.png)
BE (1) BE686079A (US07922777-20110412-C00004.png)
NL (1) NL6612068A (US07922777-20110412-C00004.png)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4075979A (en) * 1975-12-19 1978-02-28 Kraftwerk Union Aktiengesellschaft Assembly of a combustion chamber nose in a continuous-flow boiler having a two-section construction with gas-tightly welded walls
US4286549A (en) * 1979-12-03 1981-09-01 Foster Wheeler Energy Corporation Steam generator support system
US4864973A (en) * 1985-01-04 1989-09-12 The Babcock & Wilcox Company Spiral to vertical furnace tube transition
US20060185624A1 (en) * 2002-11-26 2006-08-24 Foster Wheeler Energia Oy Tower boiler including a stationary supporting structure

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1887854A (en) * 1930-07-24 1932-11-15 Lasker George Drumless boiler
FR1334730A (fr) * 1961-11-02 1963-08-09 Siemens Ag Chaudière à circulation avec chauffe en surpression
US3315647A (en) * 1965-06-29 1967-04-25 Combustion Eng Marine steam generator having fluid cooled furnace

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1887854A (en) * 1930-07-24 1932-11-15 Lasker George Drumless boiler
FR1334730A (fr) * 1961-11-02 1963-08-09 Siemens Ag Chaudière à circulation avec chauffe en surpression
US3315647A (en) * 1965-06-29 1967-04-25 Combustion Eng Marine steam generator having fluid cooled furnace

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4075979A (en) * 1975-12-19 1978-02-28 Kraftwerk Union Aktiengesellschaft Assembly of a combustion chamber nose in a continuous-flow boiler having a two-section construction with gas-tightly welded walls
US4286549A (en) * 1979-12-03 1981-09-01 Foster Wheeler Energy Corporation Steam generator support system
US4864973A (en) * 1985-01-04 1989-09-12 The Babcock & Wilcox Company Spiral to vertical furnace tube transition
US20060185624A1 (en) * 2002-11-26 2006-08-24 Foster Wheeler Energia Oy Tower boiler including a stationary supporting structure
US7240640B2 (en) * 2002-11-26 2007-07-10 Foster Wheeler Energia Oy Tower boiler including a stationary supporting structure

Also Published As

Publication number Publication date
NL6612068A (US07922777-20110412-C00004.png) 1967-02-28
BE686079A (US07922777-20110412-C00004.png) 1967-02-01

Similar Documents

Publication Publication Date Title
GB1114441A (en) Multiple pass arrangements for once-through steam generators
US3125995A (en) forced flow vapor generating unit
US3927646A (en) Vapor generator
US3396707A (en) Gas passes
US3400689A (en) Vapour generators
US3105466A (en) Vapor generator
US4175519A (en) Vapor generator utilizing vertical bars for supporting angularly arranged furnace boundary wall fluid flow tubes
US3323496A (en) Tubulous support wall
US2834324A (en) Vapor generator with high temperature pendent superheater platens
US2948267A (en) Steam generating unit having a superheater and reheater each including a radiant section and a convection section
US3288117A (en) Arrangement of tube circuits in supercritical forced through-flow vapor generator
US3888213A (en) Boilers
US3020894A (en) Steam generating and superheating unit
US2088724A (en) Boiler and furnace installation
US3007459A (en) Forced flow vapor generating unit
US2979041A (en) Vapor generator
US2397523A (en) Steam generator
US3173405A (en) Once-through vapor generator
US3310041A (en) Vapor generator heating gas pass tube support and partition wall construction
US3754533A (en) Tube support system
US2797667A (en) Controlled circulation boiler with novel dual furnace
GB1022838A (en) Supercritical forced through-flow vapor generator with improved wall arrangement
US3156219A (en) Tubulous vapour generators
GB1163555A (en) Once through vapor generators
US2980083A (en) Heat exchange organization