US3832978A - Tubing for a combustion chamber - Google Patents

Tubing for a combustion chamber Download PDF

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Publication number
US3832978A
US3832978A US00344053A US34405373A US3832978A US 3832978 A US3832978 A US 3832978A US 00344053 A US00344053 A US 00344053A US 34405373 A US34405373 A US 34405373A US 3832978 A US3832978 A US 3832978A
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United States
Prior art keywords
tubes
angle
rectangular
tubing
combustion chamber
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Expired - Lifetime
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US00344053A
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English (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
    • F22B37/02—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

  • 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.
  • This bottom has usually had two oppositely disposed rectangular surfaces inclined at an angle from a horizontal plane and two oppositely disposed vertically oriented trapezoidal 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 developed surface including a plurality of tubes inclined at an angle within four surfaces for forming the four walls of the combustion chamber. ln addition, the tubes extend on an angle into four other surfacesfor forming the rectangular and trapezoidal surfaces of the funnel-shaped bottom of the combustion chamber.
  • the relationship of the various angles is such that the angle (a) of the rectangular surfaces to the horizontal is equal to the difference between 90 and twice the angle (a') at which the tubes extend into the four surfaces for the funnel-shaped bottom.
  • each rectangular surface of the bottom are each bent to extend toward a lower edge of .the rectangular surface so that the number of tubes extending to a vertical edge of the surface is equal to the number of tubes extending to an adjacent edge of an adjacent trapezoidal surface.
  • FIG. 1 illustrates a development of tubing according to the invention for a combustion chamber. having a rectangular cross-section
  • FIG. 2 illustrates a corresponding development of the tubing for a combustion chamber which is square in plan view.
  • the tubing for a combustion chamber 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 tubes 5 inclined at an angle of ,3 25 from the horizontal.
  • the surfaces forming the front and rear walls 1, 3 are connected to a rectangular surface l0, 1] respectively, while the surfaces forming the side walls 2, 4, respectively adjoin equal-sided trapezoidal surfaces 12, 13 respectively at their base-lines 14, 15.
  • the sides 16 to 19 of the trapezoidal surfaces l2, 13 are all of equal length, and equal to theshort sides 20 of the rectangular surfaces.
  • the tubes which are distributed uniformly over the perimeter, enter at an angle of a, for example, 20, into the rectangular and trapezoidal surfaces 10 to 13.
  • the acute angle between the trapezoid sides 16 to 19 on the one hand and the base-lines 14, 15, on the other hand is designated a and is, for example, 50.
  • the angle a corresponds to the slope of the rectangular surfaces 10, 11 from the hori-.
  • the directional path of the tubes in each rectangular surface 10, 11 is bent or interrupted along a diagonal 30, 31.
  • the angle of refraction is such that the tubes of each rectangular surface 10, 11 which, if extended without refraction, would run into the adjacent trapezoidal surface, are refracted to run into the lower horizontal edge of the rectangular surface.
  • a straight line 33 is first drawn from the corner 32 of the trapezoidal surface 13 at the angle a of the tubes in the trapezoidal surface 13 to the diagonal 31 to determine a point 34.
  • a straight line 36 from this point 34 to a point 35, corresponding to the point 32 but on the rectangular surface 11, determines the direction of the tubes in the rectangular surface 11 below the diagonal 31. This ensures that the required number of tubes are directed into the sides 18 of the trapezoidal surface 13 and, at the same time, ensures that the other tubes running into the rectangular surface 11 are distributed uniformly along the other side of the surface 11.
  • the surfaces forming the front and rear walls, as well as the side walls of the combustion chamber are of equal width, so that the combustion chamber is square in plan view.
  • the angle of slope B of the tubes in combustionchamber walls is equal to the entry angle a of the tubes in the rectangular and trapezoidal walls of FIG. 1. This permits a particularly simple and rational fabrication of the combustion chamber.
  • Tubing for a vertical combustion chamber comprising 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 on a second angle (a') from said four surfaces into four other surfaces for forming a funnel-shaped bottom including two oppositely disposed rectangular surfaces inclined at a third angle (a) from a horizontal plane and two oppositely disposed vertically oriented trapezoidal surfaces, said angles defining a relationship of a 2 (a), at least part of said tubes within each said rectangular surface being bent to extend toward a lower edge of said rectangular surface with the number of tubes extending to a vertical edge of said rectangular surface being equal to the number of tubes extending to an adjacent edge of an adjacent trapezoidal surface.

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  • 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)
  • Details Of Fluid Heaters (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
US00344053A 1972-03-17 1973-03-22 Tubing for a combustion chamber Expired - Lifetime US3832978A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH401272A CH549756A (de) 1972-03-17 1972-03-17 Brennkammerberohrung.

Publications (1)

Publication Number Publication Date
US3832978A true US3832978A (en) 1974-09-03

Family

ID=4268154

Family Applications (1)

Application Number Title Priority Date Filing Date
US00344053A Expired - Lifetime US3832978A (en) 1972-03-17 1973-03-22 Tubing for a combustion chamber

Country Status (7)

Country Link
US (1) US3832978A (enrdf_load_html_response)
JP (1) JPS542322B2 (enrdf_load_html_response)
CA (1) CA976823A (enrdf_load_html_response)
CH (1) CH549756A (enrdf_load_html_response)
FR (1) FR2177324A5 (enrdf_load_html_response)
NL (1) NL160073C (enrdf_load_html_response)
SE (1) SE379240B (enrdf_load_html_response)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4178881A (en) * 1977-12-16 1979-12-18 Foster Wheeler Energy Corporation Vapor generating system utilizing angularly arranged bifurcated furnace boundary wall fluid flow tubes
US4726323A (en) * 1985-12-04 1988-02-23 Sulzer Brothers Limited Solid fuel fired vapor generator
US4782793A (en) * 1985-09-23 1988-11-08 Sulzer Brothers Limited Fossil-fuel fired vapor generator

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 (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4178881A (en) * 1977-12-16 1979-12-18 Foster Wheeler Energy Corporation Vapor generating system utilizing angularly arranged bifurcated furnace boundary wall fluid flow tubes
US4782793A (en) * 1985-09-23 1988-11-08 Sulzer Brothers Limited Fossil-fuel fired vapor generator
US4726323A (en) * 1985-12-04 1988-02-23 Sulzer Brothers Limited Solid fuel fired vapor generator

Also Published As

Publication number Publication date
NL7205359A (enrdf_load_html_response) 1973-09-19
SE379240B (enrdf_load_html_response) 1975-09-29
CA976823A (en) 1975-10-28
JPS542322B2 (enrdf_load_html_response) 1979-02-06
FR2177324A5 (enrdf_load_html_response) 1973-11-02
JPS4912202A (enrdf_load_html_response) 1974-02-02
NL160073C (nl) 1979-09-17
CH549756A (de) 1974-05-31
NL160073B (nl) 1979-04-17

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