EP0321611A1 - Tube foyer pour tube chauffant à radiation pour four industriel - Google Patents

Tube foyer pour tube chauffant à radiation pour four industriel Download PDF

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Publication number
EP0321611A1
EP0321611A1 EP87202604A EP87202604A EP0321611A1 EP 0321611 A1 EP0321611 A1 EP 0321611A1 EP 87202604 A EP87202604 A EP 87202604A EP 87202604 A EP87202604 A EP 87202604A EP 0321611 A1 EP0321611 A1 EP 0321611A1
Authority
EP
European Patent Office
Prior art keywords
tube
flame tube
flame
hollow cylindrical
cylindrical parts
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.)
Withdrawn
Application number
EP87202604A
Other languages
German (de)
English (en)
Inventor
Franco Andreoli
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to EP87202604A priority Critical patent/EP0321611A1/fr
Priority to IT882943A priority patent/IT8802943A0/it
Publication of EP0321611A1 publication Critical patent/EP0321611A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/06—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated
    • F27B9/068—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated heated by radiant tubes, the tube being heated by a hot medium, e.g. hot gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B7/00—Steam boilers of furnace-tube type, i.e. the combustion of fuel being performed inside one or more furnace tubes built-in in the boiler body
    • F22B7/16—Component parts thereof; Accessories therefor, e.g. stay-bolt connections
    • F22B7/20—Furnace tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C3/00—Combustion apparatus characterised by the shape of the combustion chamber
    • F23C3/002—Combustion apparatus characterised by the shape of the combustion chamber the chamber having an elongated tubular form, e.g. for a radiant tube
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0001—Heating elements or systems
    • F27D99/0033—Heating elements or systems using burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0001—Heating elements or systems
    • F27D99/0033—Heating elements or systems using burners
    • F27D99/0035—Heating indirectly through a radiant surface

Definitions

  • the invention relates to a flame tube for a radiant heating tube of an industrial furnace, which is formed from refractory fibrous material, or is composed of a plurality of hollow cylindrical parts made of refractory fibrous material which are connected to one another or simply arranged one behind the other.
  • the previously known flame tubes of radiant heating tubes are either metallic or made of compact (sintered) ceramic materials.
  • the metallic flame tubes have a limited temperature resistance, while those made of sintered ceramic refractory materials are susceptible to cracking, as a result of the much higher internal temperature than the outside temperature, stresses arise due to the different thermal expansion.
  • the invention relates to a flame tube, which has a very long service life due to the production from high-temperature-resistant fiber materials.
  • the most important technical advantage that can be achieved by this design is that the flame tube thus realized, thanks to the elasticity of the fiber material, does not suffer from cracks due to heat impacts or very high temperature differences between the inner and outer walls, and therefore has a higher thermal load-bearing capacity than with conventional designs having.
  • Another advantage is that the flame tube in this version, thanks to the typical low density of the fiber materials, is very light and easy to handle. Furthermore, the reduced heat content allows the heating-up time and the heat losses in the furnaces for intermittent operation to be reduced.
  • Flame tubes according to this invention can also be produced from a plurality of hollow cylindrical parts made of fibrous material which are connected to one another or arranged one behind the other.
  • the outermost ends of the hollow cylindrical parts can be formed in such a way that a simple coupling and sticking together for sealing is possible.
  • Wall thickness and fiber properties of the hollow cylindrical parts mentioned can also be different in order to achieve uniform heat emission along the flame tube.
  • radial passages for returning the exhaust gases into the ring-shaped exhaust gas guide can be provided in the end part of such a flame tube.
  • spacer ribs made of metal or fiber materials can easily be attached or fitted to the inner wall of the jacket tube.
  • a jet pipe made of heat-resistant steel in U-type (2) is used through a furnace wall (1), with the burner (3), with the feed line (4) of the fuel, generally fuel gas, and with an air duct (5) surrounding it coaxially.
  • the burner (3) opens into the so-called flame tube (6), a tube section which consists of one or more hollow cylindrical parts made of fiber material.
  • the length of the flame tube (6) corresponds approximately to the flame length and should in any case expediently reach the point where the combustion is complete.
  • An annular shoulder (7) is provided to support the flame tube.
  • a jacket radiant tube (8) made of heat-resistant steel is inserted through the furnace wall (1), with a coaxially arranged inner tube (9) also made of heat-resistant steel, which with the inner wall of the jacket tube (8) forms an annular gap ( 10) limited, which serves as an exhaust gas guide.
  • the burner (3) opens into the so-called flame tube (6 ⁇ ), a tube section which consists of one or more hollow-cylindrical fibers made of fiber material, with a structure similar to that in FIG.
  • the flame tube (6 ⁇ ) sits on the end face of the casing tube (8), while the metallic inner tube (9) of FIG. 2 has been eliminated.
  • the flame tube consists of several hollow cylindrical parts arranged one behind the other, these can be shaped in such a way that the connection is made by pushing in and gluing the outermost ends (11) together.
  • longitudinal ribs (12) abutting the inner wall of the jacket tube are provided, between which longitudinal channels (13) serving for exhaust gas removal remain free.
  • the flame tube (6 ⁇ ) has openings (14) for the passage of the exhaust gases into the longitudinal channels (13).

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)
EP87202604A 1987-12-22 1987-12-22 Tube foyer pour tube chauffant à radiation pour four industriel Withdrawn EP0321611A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP87202604A EP0321611A1 (fr) 1987-12-22 1987-12-22 Tube foyer pour tube chauffant à radiation pour four industriel
IT882943A IT8802943A0 (it) 1987-12-22 1988-06-13 Tubo di fiamma per un tubo radiante di un forno industriale.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP87202604A EP0321611A1 (fr) 1987-12-22 1987-12-22 Tube foyer pour tube chauffant à radiation pour four industriel

Publications (1)

Publication Number Publication Date
EP0321611A1 true EP0321611A1 (fr) 1989-06-28

Family

ID=8197729

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87202604A Withdrawn EP0321611A1 (fr) 1987-12-22 1987-12-22 Tube foyer pour tube chauffant à radiation pour four industriel

Country Status (2)

Country Link
EP (1) EP0321611A1 (fr)
IT (1) IT8802943A0 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5348468A (en) * 1990-11-02 1994-09-20 Chamottewaren-Und Thonofenfabrick Aug. Rath Jun. Aktiengesellschaft Fiber brick and burner with such fiber brick
EP0889297A1 (fr) * 1997-07-03 1999-01-07 Ruhrgas Aktiengesellschaft Installation pour produire et/ou maintenir un bain métallique en température
EP1167877A1 (fr) * 2000-06-29 2002-01-02 Gas Technology Institute Système de tube radiant annulaire avec récupérateur et culot unique

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3336716A (en) * 1963-07-10 1967-08-22 Johns Manville Furnace combustion chamber with a transverse composition differential
DE2940245A1 (de) * 1979-10-04 1981-04-16 Brown, Boveri & Cie Ag, 6800 Mannheim Flammrohr
EP0079594A1 (fr) * 1981-11-11 1983-05-25 LAFARGE REFRACTAIRES Société Anonyme Chaudière du chauffage central
EP0191910A1 (fr) * 1984-12-28 1986-08-27 Aichelin GmbH Tube foyer céramique pour le tuyau de chauffage à rayonnement d'un brûleur industriel
DE8631630U1 (de) * 1986-11-26 1987-03-05 Mann, Wilhelm, Dipl.-Ing., 6301 Allendorf Einschiebbare Brennkammer für Heizkessel mit Gebläsebrenner

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3336716A (en) * 1963-07-10 1967-08-22 Johns Manville Furnace combustion chamber with a transverse composition differential
DE2940245A1 (de) * 1979-10-04 1981-04-16 Brown, Boveri & Cie Ag, 6800 Mannheim Flammrohr
EP0079594A1 (fr) * 1981-11-11 1983-05-25 LAFARGE REFRACTAIRES Société Anonyme Chaudière du chauffage central
EP0191910A1 (fr) * 1984-12-28 1986-08-27 Aichelin GmbH Tube foyer céramique pour le tuyau de chauffage à rayonnement d'un brûleur industriel
DE8631630U1 (de) * 1986-11-26 1987-03-05 Mann, Wilhelm, Dipl.-Ing., 6301 Allendorf Einschiebbare Brennkammer für Heizkessel mit Gebläsebrenner

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5348468A (en) * 1990-11-02 1994-09-20 Chamottewaren-Und Thonofenfabrick Aug. Rath Jun. Aktiengesellschaft Fiber brick and burner with such fiber brick
EP0889297A1 (fr) * 1997-07-03 1999-01-07 Ruhrgas Aktiengesellschaft Installation pour produire et/ou maintenir un bain métallique en température
EP1167877A1 (fr) * 2000-06-29 2002-01-02 Gas Technology Institute Système de tube radiant annulaire avec récupérateur et culot unique

Also Published As

Publication number Publication date
IT8802943A0 (it) 1988-06-13

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