US2995118A - Tubular lining for the combustion chamber of a radiant heat tubular heat exchanger - Google Patents

Tubular lining for the combustion chamber of a radiant heat tubular heat exchanger Download PDF

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Publication number
US2995118A
US2995118A US845471A US84547159A US2995118A US 2995118 A US2995118 A US 2995118A US 845471 A US845471 A US 845471A US 84547159 A US84547159 A US 84547159A US 2995118 A US2995118 A US 2995118A
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US
United States
Prior art keywords
combustion chamber
tubular
tubes
lining
heat exchanger
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
US845471A
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English (en)
Inventor
Brandstetter Georg
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
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 filed Critical Sulzer AG
Application granted granted Critical
Publication of US2995118A publication Critical patent/US2995118A/en
Anticipated expiration legal-status Critical
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
    • 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
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M5/00—Casings; Linings; Walls
    • F23M5/08—Cooling thereof; Tube walls

Definitions

  • the present invention relates to tubular'linings of the combustion chamber of a radiant heat tubular heat exchanger, particularly of a radiant heat steam generator having a substantially cylindrical combustion chamber provided with a substantially circular outlet for the combustion gases whose diameter is smaller than the diameter of the combustion chamber.
  • the combustion chamber is lined by a plurality of tubes arranged in parallel with respect to the flow of the medium through the tubes which medium is heated by heat developed in the combustion chamber, the tubes being placed parallel to each other and forming one or a plurality of ribbons arranged in meandering fashion to cover or form the inside walls of the combustion chamber.
  • Linings of the kind with which the invention is concerned are used in combustion chambers of steam generators of the forced circulation or forced flow type. Particularly in forced flow steam generators it is of great importance that the individual tubes forming a tube ribbon have the same length and oifer the same flow resistance to the fluid inside the tubes 80 that the individual tubes absorb substantially the same amount of heat. Conventional combustion chamber linings do not fully satisfy this requirement.
  • the tube ribbon is arranged in parallel relation to the longitudinal axis of the combustion chamber and covers the inside wall of the combustion chamber in a meandering fashion.
  • the individual tubes and the ribbon formed thereby and covering the cylindrical wall of the combustion chamber have U-bends located at the annular marginal part of the bottom of the combustion chamber and at the annular marginal part around the circular outlet opening in the ceiling of the combustion chamber which opening has a diameter smaller than that of the combustion chamber.
  • the entire combustion chamber islined by one or a plurality of continuous tube ribbons whose tubes are arranged in parallel relation with respect to the flow of heat absorbing medium flowing therethrough and are placed parallel to each other, whereby all tubes have the same length and the same bends so that the internal flow resistance of the individual tubes is equal.
  • the arrangement according to the invention has the additional advantage that the entire combustion chamber lining can be produced by a small number of differently shaped groups of tubes.
  • FIG. 1 is a portion of a diagrammatic longitudinal section of a cyclone burner type combustion chamber of a forced flow steam generator.
  • FIG. 2 is a diagrammatic top view of the tubular lining of the bottom of the combustion chamber shown in FIG. 1 and of the tube band, lining the cylindrical wall of the combustion chamber, in spread-out position.
  • numeral 1 designates a combustion chamber having a cylindrical part between planes A and B which are at a right angle to the longitudinal axis of the combustion chamber.
  • the lower end of the combustion chamber is provided with a frusto-conical bottom and the upper end of the combustion chamber is provided with a substantially concentric outlet opening 3 of smaller cross section than the combustion chamber.
  • the upper end of the combustion chamber has, therefore, an annular wall portion C opposite the bottom of the combustion chamber.
  • the bottom of the combustion chamber, the cylindrical part of the combustion chamber between the planes A and B and the annular part C at the upper end of the combustion chamber are lined by a ribbon formed by a plurality of tubes arranged in parallel with respect to the flow of the operating medium therethrough and placed in parallel relatic-n.
  • the tube ribbon enters the combustion chamber at the center of the bottom of the combustion chamber and covers the bottom in concentric circles up to an outer diameter D, the individual tubes and the ribbon formed thereby having a U-bend at the end of each concentric circle and at the beginning of the subsequent circle of larger diameter.
  • the portion of the tube ribbon forming the outermost circle at the bottom of the combustion chamber continues in a vertical direction parallel to the longitudinal axis of the combustion chamber to line the longitudinal wall of the latter in a meandering fashion.
  • the individual vertical tubes and the part of the ribbon formed thereby have U-bends or return bends located at the outermost part of the bottom of the combustion chamber in the region between the circle of the diameter D and the circle formed by the combustion chamber wall at the plane A.
  • the individual vertical tubes and the ribbons formed thereby have U-bends or return bends located at the annular part C at the outlet of the combustion chamber adjacent to the circular opening 3.
  • each tube ribbon is used for lining the entire combustion chamber
  • a plurality of ribbons arranged in parallel with respect to each other and with respect to the flow of operating medium therethrough may be provided. If two ribbons are used, the combustion chamber may be split by a diametrical plane into two halves and each ribbon may line the interior wall of one longitudinal half of the combustion chamber.
  • a substantially cylindrical combustion chamber having a substantially closed bottom, a ceiling opposite said bottom, said ceiling having a substantially circular opening substantially coaxial of said combustion chamber and having a diameter which is smaller than the diameter of said combustion chamber and leaving an annular ceiling portion
  • said combustion chamber being lined by tubes conducting a medium receiving heat from said combustion chamber, a plurality of said tubes being arranged in parallel relation with respect to the medium flowing through the tubes and being placed parallel and adjacent to each other to form a continuous ribbon entering the combustion chamber at the center of said bottom and being placed for covering said bottom excepting the outer annular marginal portion thereof in concentric circles beginning in the center of said bottom, the individual tubes and the ribbon formed thereby having a U-bend at the end of each circle and at the beginning of the subsequent circle of larger diameter, the portion of the ribbon forming the outermost circle at the bottom of the combustion chamber continuing through a substantially radial portion into a portion which is parallel to the longitudinal axis of the combustion chamber and lines a part of the longitudinal interior Wall thereof, said last mentioned portion continuing

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Combustion Of Fluid Fuel (AREA)
  • Gas Burners (AREA)
US845471A 1958-10-09 1959-10-09 Tubular lining for the combustion chamber of a radiant heat tubular heat exchanger Expired - Lifetime US2995118A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEK35939A DE1124513B (de) 1958-10-09 1958-10-09 Brennkammer-Rohrauskleidung fuer Strahlungs-Roehrenwaermeaustauscher, insbesondere Strahlungsdampferzeuger

Publications (1)

Publication Number Publication Date
US2995118A true US2995118A (en) 1961-08-08

Family

ID=7220525

Family Applications (1)

Application Number Title Priority Date Filing Date
US845471A Expired - Lifetime US2995118A (en) 1958-10-09 1959-10-09 Tubular lining for the combustion chamber of a radiant heat tubular heat exchanger

Country Status (7)

Country Link
US (1) US2995118A (de)
BE (1) BE583412A (de)
CH (1) CH371812A (de)
DE (1) DE1124513B (de)
FR (1) FR1243966A (de)
GB (1) GB857645A (de)
NL (2) NL243771A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1916478A2 (de) * 2006-10-24 2008-04-30 Fritz Egger GmbH & Co. Heißgasbetriebene Trocknungsvorrichtung

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1998329A (en) * 1933-01-26 1935-04-16 Gen Electric Elastic fluid generator or boiler
US2896591A (en) * 1957-07-15 1959-07-28 Combustion Eng Furnace wall for forced once-through boiler

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE716716C (de) * 1938-12-29 1942-01-27 Kohlenscheidungs Ges M B H Strahlungskessel fuer Brennstaubfeuerung

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1998329A (en) * 1933-01-26 1935-04-16 Gen Electric Elastic fluid generator or boiler
US2896591A (en) * 1957-07-15 1959-07-28 Combustion Eng Furnace wall for forced once-through boiler

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1916478A2 (de) * 2006-10-24 2008-04-30 Fritz Egger GmbH & Co. Heißgasbetriebene Trocknungsvorrichtung
EP1916478A3 (de) * 2006-10-24 2011-05-04 Fritz Egger GmbH & Co. OG Heißgasbetriebene Trocknungsvorrichtung

Also Published As

Publication number Publication date
NL120267C (de)
DE1124513B (de) 1962-03-01
FR1243966A (fr) 1960-10-21
GB857645A (en) 1961-01-04
CH371812A (de) 1963-09-15
BE583412A (fr) 1960-02-01
NL243771A (de)

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