US3832979A - Tubing for a combustion chamber - Google Patents

Tubing for a combustion chamber Download PDF

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Publication number
US3832979A
US3832979A US34458273A US3832979A US 3832979 A US3832979 A US 3832979A US 34458273 A US34458273 A US 34458273A US 3832979 A US3832979 A US 3832979A
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US
United States
Prior art keywords
tubes
rectangular
angle
triangular
combustion chamber
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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
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English (en)
Inventor
H Ammann
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Sulzer AG
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Sulzer AG
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Publication date
Application filed by Sulzer AG filed Critical Sulzer AG
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Publication of US3832979A publication Critical patent/US3832979A/en
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Expired - Lifetime 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
    • F22B37/14—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

Definitions

  • F22b 37/20 face via bends-
  • the tubes in the rectangular [58] Field of Search 22/1316 5 6 A 235 A faces extend from the combustion chamber walls and 122/535 6 235 the triangular surfaces at an angle 'y arc ctg (2 cosa) 7 and are bent at intermediate points to extend uni- [56] References Cited formly to the lower edge of the respective rectangular UNITED STATES PATENTS surface 2,896,591 7 1959 Schroedter 122/010. 5 3 Claims, 1 Drawlng Figure TUBING FOR A COMBUSTION This invention relates to tubing for a combustion chamber, particularly, a vertical combustion chamber.
  • the known vertical combustion chambers have been constructed with four vertical walls to define a rectangular cross-sectional shape and a funnelshaped bottom.
  • the bottom has had two oppositely disposed rectangular surfaces inclined at an angle from a horizontal plane and two oppositely disposed vertically oriented isosceles triangular surfaces.
  • the combustion chamber walls have been formed of tubes inclined at the same angle from the horizontal and tightly welded-together either directly or through the intermediary of bridges. These tubes have been extended into the surfaces of the funnel-shaped bottom and have been likewise tightly welded together therein.
  • the invention provides a tubing for a combustion chamber as above which has a plurality of tubes inclined at an angle within four surfaces for forming the four walls of the combustion chamber. in addition, the tubes extend on an angle into four other surfaces for forming the rectangular and triangular surfaces of the funnel-shaped bottom of the combustion chamber.
  • the tubes which extend into each triangular surface all run parallelto one of the two equal sceles wall of the triangular surface and at an angle (0:) equal to the slope angle of the rectangular surfaces.
  • the tubes which extend into each rectangular surface, both from the wall surfaces of the combustion chamber and froman'adjacent triangular surface, are each parallel, at least initially, and all are disposed at an angle ('y) to the border between the combustion chamber walls and the rectangular surfaces.
  • This latter angle (7) is equal to the arc cotangent of twice the cosine of the slope angle (a) of the rectangular surfaces to the horizontal. This is expressed by:
  • all of the tubes within each rectangular surface of the bottom are each bent to extend toward a lower edge of the rectangular surface so that all these tubes extend to the lower, edge in a uniformly distributed'manner and in parallel to the triangular surfaces.
  • the relationship of the angle (7) of the tubes in the rectangular surfaces and of the angle (a) of the tubes in the triangular surfaces of the funnel-shaped bottom ensures acontinuous transition of the tubes from the triangular surfaces into the adjacent rectangular surfaces by means of simple right-angled bends. Further, the alteration of the directional path of the tubes in the rectangular surfaces need only require a single change of direction.
  • the slope angle a of the rectangular surfaces satisfies the relationship S m: 1/(a/b+' 1 wherein a designates the width of the combustion chamber wall situated above the triangular surface,and
  • the drawing illustrates'a development of tubing according to the invention for a combustion chamber having a rectangular cross-section.
  • the tubing for a combustion chamber for example, intended primarily for heating by oil-firing, has four surfaces for forming a front wall 1, side walls 2 and 4, and rear wall 3 of a combustion chamber. These surfaces are formed of a plurality of surfaces forming the front and rear walls 1, 3 are conwalls 2, 4, respectively adjoin isosceles triangular surfaces 12, 14 respectivley at their bottom ends.
  • the tubes 6 in the triangular surface 12 run parallel to one side 15, that is, at an angle a relative to the horizontal line 5 while at the opposite side 16, the tubes run over a bend into the adjacent rectangular surface ll, 13 respectively.
  • the tubes continue to run in the rectangular surface at an angle 7 relative to the horizontal line 5 to the side 20 of the rectangular surface 11.
  • the tubes running from the front wall 1 into the rectangular surface 11 initially run into the rectangular surface at the angle 7 and are thereafter ctg 'y 2 cosa from which, as
  • the entry angle 'y 7 of the tubes into the rectangular surfaces ll, 13 is determined by the slope-angle a of the funnel.
  • the slope-angle B of the tubes is given by the number of tubes existing on the combustion-chamber perimeter, on the desired distribution of the tubes, and on the combustion-chamber perimeter. It may be advantageous to make the slope-angle a 'of the funnel slant equal to the slope-angle B of the tubes in the combustion-chamber walls, so that the tubes may run straight out of the side walls 2 and 3 into the triangular surfaces l2, 14.
  • the angle y, of the tubes running into the rectangular surfaces ll, 13 will differ from the angle B. At the boundary between the front wall I and the rectangular surface 11, the tube spacing becomes changed and, thus, the width of the bridge between the tubes. This produces a difference in the mean temperature of the adjoining surfaces.
  • the tube spacing in the triangular surface 12 and in the abutting rectangular surface 13 in the half below the diagonal 21' are made equal to one another. That is, the slope-angle a of the rectangular surface, in accordance with the relationship sina l/(a/b is made dependent on the front-to-side ratio a/b of the combustion chamber.
  • the tubes of both rectangular surfaces below the edge where the rectangular surfaces 11 and 13 abut are connected either to a common distributor, or else to individual distributors for the tubes of each rectangular surface.
  • Tubing for a vertical combustion chamber comprising four gas tight walls defining a rectangular crosssectional shape and having a plurality of interconnected tubes inclined at a first angle (B) from a horizontal plane within four surfaces defining a rectangular cross-sectional shape for forming four walls of the combustion chamber, said tubes extending from said four surfaces into four other surfaces for forming a funnelshaped bottom including two oppositely disposed gas tight rectangular surfaces inclined at a second angle (a) from a horizontal plane and two oppositely disposed gas tight verticaly oriented isosceles triangular surfaces, said tubes in each said triangular surface being disposed in parallel to one of the two equal sceles of said respective triangular surface and extending to an adjacent rectangular surface,
  • said tubes in each rectangular surface extending in parallel from an adjacent wall of the combustion chamber and from an adjacent triangular surface initially at a third angle (7) to the edge formed by the rectangular surface and the adjacent wall, said third angle (7) being expressed as:

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion Of Fluid Fuel (AREA)
US34458273 1972-03-30 1973-03-26 Tubing for a combustion chamber Expired - Lifetime US3832979A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH478372A CH549757A (de) 1972-03-30 1972-03-30 Brennkammerberohrung.

Publications (1)

Publication Number Publication Date
US3832979A true US3832979A (en) 1974-09-03

Family

ID=4282460

Family Applications (1)

Application Number Title Priority Date Filing Date
US34458273 Expired - Lifetime US3832979A (en) 1972-03-30 1973-03-26 Tubing for a combustion chamber

Country Status (7)

Country Link
US (1) US3832979A (xx)
JP (1) JPS5237521B2 (xx)
CA (1) CA977622A (xx)
CH (1) CH549757A (xx)
FR (1) FR2178697A5 (xx)
NL (1) NL160074C (xx)
SE (1) SE377179B (xx)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4116168A (en) * 1977-04-28 1978-09-26 Foster Wheeler Energy Corporation Vapor generating system utilizing integral separators and angularly arranged furnance boundary wall fluid flow tubes
US4175519A (en) * 1978-03-31 1979-11-27 Foster Wheeler Energy Corporation Vapor generator utilizing vertical bars for supporting angularly arranged furnace boundary wall fluid flow tubes
US4191133A (en) * 1977-11-07 1980-03-04 Foster Wheeler Energy Corporation Vapor generating system utilizing integral separators and angularly arranged furnace boundary wall fluid flow tubes having rifled bores
US4198930A (en) * 1978-05-09 1980-04-22 Foster Wheeler Energy Corporation Gas screen arrangement for a vapor generator
US4344388A (en) * 1977-11-07 1982-08-17 Foster Wheeler Energy Corporation Vapor generating system utilizing integral separators and angularly arranged furnace boundary wall fluid flow tubes having rifled bores
US4782793A (en) * 1985-09-23 1988-11-08 Sulzer Brothers Limited Fossil-fuel fired vapor generator
AU587882B2 (en) * 1985-12-04 1989-08-31 Abb Management Ltd. A solid fuel fired vapour producer
US5687676A (en) * 1994-12-16 1997-11-18 Mitsubishi Jukogyo Kabushiki Kaisha Steam generator

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5588859U (xx) * 1978-12-16 1980-06-19
JPS55147853U (xx) * 1979-04-11 1980-10-24

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2896591A (en) * 1957-07-15 1959-07-28 Combustion Eng Furnace wall for forced once-through boiler
US3395677A (en) * 1966-02-04 1968-08-06 Sulzer Ag Tube lining for prismatic combustion chambers
GB1163303A (en) * 1965-08-27 1969-09-04 Babcock & Wilcox Ltd Improvements in or relating to Gas Passes Lined with Wall Tubes

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2896591A (en) * 1957-07-15 1959-07-28 Combustion Eng Furnace wall for forced once-through boiler
GB1163303A (en) * 1965-08-27 1969-09-04 Babcock & Wilcox Ltd Improvements in or relating to Gas Passes Lined with Wall Tubes
US3395677A (en) * 1966-02-04 1968-08-06 Sulzer Ag Tube lining for prismatic combustion chambers

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4116168A (en) * 1977-04-28 1978-09-26 Foster Wheeler Energy Corporation Vapor generating system utilizing integral separators and angularly arranged furnance boundary wall fluid flow tubes
US4191133A (en) * 1977-11-07 1980-03-04 Foster Wheeler Energy Corporation Vapor generating system utilizing integral separators and angularly arranged furnace boundary wall fluid flow tubes having rifled bores
US4344388A (en) * 1977-11-07 1982-08-17 Foster Wheeler Energy Corporation Vapor generating system utilizing integral separators and angularly arranged furnace boundary wall fluid flow tubes having rifled bores
US4175519A (en) * 1978-03-31 1979-11-27 Foster Wheeler Energy Corporation Vapor generator utilizing vertical bars for supporting angularly arranged furnace boundary wall fluid flow tubes
US4198930A (en) * 1978-05-09 1980-04-22 Foster Wheeler Energy Corporation Gas screen arrangement for a vapor generator
US4782793A (en) * 1985-09-23 1988-11-08 Sulzer Brothers Limited Fossil-fuel fired vapor generator
AU587882B2 (en) * 1985-12-04 1989-08-31 Abb Management Ltd. A solid fuel fired vapour producer
US5687676A (en) * 1994-12-16 1997-11-18 Mitsubishi Jukogyo Kabushiki Kaisha Steam generator

Also Published As

Publication number Publication date
JPS5237521B2 (xx) 1977-09-22
NL160074C (nl) 1979-09-17
CH549757A (de) 1974-05-31
CA977622A (en) 1975-11-11
JPS4915032A (xx) 1974-02-09
NL7205661A (xx) 1973-10-02
SE377179B (xx) 1975-06-23
FR2178697A5 (xx) 1973-11-09

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