EP0191910B1 - Tube foyer céramique pour le tuyau de chauffage à rayonnement d'un brûleur industriel - Google Patents

Tube foyer céramique pour le tuyau de chauffage à rayonnement d'un brûleur industriel Download PDF

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Publication number
EP0191910B1
EP0191910B1 EP85114525A EP85114525A EP0191910B1 EP 0191910 B1 EP0191910 B1 EP 0191910B1 EP 85114525 A EP85114525 A EP 85114525A EP 85114525 A EP85114525 A EP 85114525A EP 0191910 B1 EP0191910 B1 EP 0191910B1
Authority
EP
European Patent Office
Prior art keywords
tube
socket
radiant heating
ceramic
flame
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
EP85114525A
Other languages
German (de)
English (en)
Other versions
EP0191910A1 (fr
Inventor
Theo Wörner
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.)
Aichelin GmbH Germany
Original Assignee
Aichelin GmbH Germany
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 Aichelin GmbH Germany filed Critical Aichelin GmbH Germany
Priority to AT85114525T priority Critical patent/ATE49650T1/de
Publication of EP0191910A1 publication Critical patent/EP0191910A1/fr
Application granted granted Critical
Publication of EP0191910B1 publication Critical patent/EP0191910B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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

Definitions

  • the invention relates to a jacket radiant tube of an industrial burner with a ceramic flame tube according to the preamble of claim 1.
  • Sheathed jet heating tubes with ceramic flame tubes are distinguished by the fact that they can absorb the high thermal loads that occur in particular when the burner is on / off, without affecting the service life.
  • a one-piece ceramic tube (GB-A-716 579) which is continuous over the entire length of the flame tube or is composed of individual tube pieces which are rigidly connected to one another, they are subject to a high risk of breakage. This is due to the fact that the metallic cast jacket tube surrounding the flame tube at a distance not only undergoes changes in length under the effect of temperature, but also a certain deflection, which the one-piece, relatively rigid ceramic flame tube cannot follow.
  • the object of the invention is therefore to provide a resistant, flexible, ceramic flame tube which, with a simple structure, prevents local overheating points from occurring on the surrounding metallic jacket tube and is distinguished by ease of assembly and repair.
  • the socket connection of the pipe sections allows a certain axial mutual mobility of the pipe sections at the connection points, without the pipe sections being separated from one another.
  • the annular gap present between the inner wall of a sleeve and the outer wall of the inserted pipe section opens on the outside of the flame tube in the axial direction of the flame tube. It is also covered on the outside by the cover ring which, with the outer circumferential surface of the sleeve or the tube piece inserted into the sleeve, in turn delimits annular gaps which open in the axial direction of the flame tube.
  • the gaps which are necessarily present at the connection points of the tube pieces which are inserted into one another with play are designed in the manner of labyrinths, which represent a high flow resistance for the hot flame gases in the interior of the flame tube. Any flame gases that pass through can only escape in the axial direction of the flame tube, i.e. H. they only coat the outer peripheral surface of parts of the ceramic pipe pieces, which is harmless. In any case, no flame gas flows radially emanating from the outside of the flame tube can occur from the connection points, which can strike the metallic jacket tube and could lead to local overheating there.
  • the pipe pieces and the cover rings are only put together in the flame tube, without any unsolvable cement connections would be required. This also allows parts that have become defective to be exchanged without the need to replace the entire flame tube.
  • each pipe section can carry an axially supporting ring shoulder at the end facing away from the sleeve for this purpose.
  • connection conditions of the flame tube to the burner result when the pipe piece adjacent to the burner is plugged with its socket-side end onto a ceramic burner mouthpiece, a connecting ring with play fitting against the burner mouthpiece being inserted into the sleeve of this pipe piece.
  • the connecting ring results in a tight connection of the flame tube to the ceramic burner mouthpiece, so that burning back of the flame between the burner mouthpiece and the flame tube is impossible. Since the burner mouthpiece and the flame tube are only plugged together, the burner can simply be pulled out during disassembly if necessary, without the flame tube needing to be removed from the jacket tube.
  • the connecting ring expediently carries spacers on its outer peripheral surface, so that the connecting ring simultaneously centers the flame tube on the side adjacent to the burner mouthpiece together with the burner mouthpiece.
  • the cover rings have spacers on their outer circumferential surface, which effect the centering of the flame tube in the casing tube. In this way it is achieved that the pipe pieces can be produced as simple, smooth-walled parts with little effort, while on the other hand the spacer parts on the cover rings ensure radial centering of the flame tube in the area of the connection points of the tube pieces, which is favorable for the stability of the flame tube.
  • such a spacer cover ring can be placed in an orientation rotated by 180 ° in order to center the flame tube at the end facing away from the burner, without the need for separate centering parts, etc.
  • the thin-walled pipe sections are made of a heavy-duty ceramic material and are characterized by their great resistance. They are preferably made of pure silicon carbide, which has proven itself extremely well for these purposes.
  • the drawing shows a radiant jacket tube with a ceramic flame tube according to the invention, in axial section, in a side view and in a partial view.
  • a ceramic flame tube 3 is arranged coaxially. Between the flame tube 3 and the casing tube 1, an annular space 4 is delimited, which serves to remove the combustion gases, as is known per se.
  • the casing tube 1 forms part of an industrial burner, which is not shown in further detail, of which only the funnel-like burner mouthpiece 5 which is coaxial with the casing tube 1 and projects into it is shown, which is also made of ceramic material and which carries an essentially cylindrical connecting piece 6 which the flame tube 3 is attached.
  • the flame tube 3 consists of the same individual ceramic, thin-walled tube pieces 7, which are each formed at one end at 8 as a sleeve and on the side opposite the sleeve 8 have a cylindrical region 9 of somewhat reduced outer diameter, which delimits an annular shoulder 10.
  • the pipe sections 7 are made of pure silicon carbide. Their wall thickness is typically approx. 5 mm, the reduction in the outer diameter, which is exaggerated in the drawing for the sake of clarity, at 9 being only approx. 0.5-1 mm.
  • the externally and internally smooth-walled pipe pieces 7 are inserted with their sleeves 8 in the manner shown in the figure with radial clearance, the pipe piece 7a adjacent to the burner being plugged onto the connecting piece 6 of the burner mouthpiece 5 with its socket-side end.
  • each cover ring 11 has an area 12 which at least partially covers the associated sleeve 8 in the axial direction and which can also extend beyond the sleeve 8, as is indicated at 13.
  • the spacer rings 11 On their cylindrical outer circumferential surface, the spacer rings 11 have rib-like spacers 14 which are aligned axially parallel and are integrally formed on the cover rings 11 in a uniform manner around the circumference of the ring.
  • the spacer parts 14, which can alternatively also be designed in the form of cams or similar elevations, project radially to the inner wall of the casing tube 1, on which they support and center the flame tube 3 radially.
  • the radial distribution and the formation of the spacer parts 14 are such that they oppose the exhaust gases flowing out through the annular space 4 with the lowest possible flow resistance, but nevertheless one Ensure perfect, mechanically resistant centering of the flame tube 3.
  • a cover ring 11 carrying spacers 14 is rotated by 180 ° on the terminal pipe section 7 in the manner shown in the figure. It ensures that the flame tube 3 is properly held and centered radially at its free end without the need for separate parts. At the same time, it results in an enlargement of the flame tube end face at the outlet end of the flame tube 3.
  • the ceramic connecting ring 15 which on its cylindrical outer circumferential surface also has regularly spaced rib-like spacers 16 which hold the flame tube 3 and the burner mouthpiece 5 Support and center radially on the inner casing wall 1.
  • annular gaps are present which open into the annular space 4 essentially coaxially to the flame tube 3.
  • Such ring gaps are present at 17, 18, for example.
  • cover rings 11 Through the cover rings 11, a labyrinth-like resulting design of the annular gaps is achieved on the connecting pieces of adjacent pipe pieces 7, which rules out a radial escape of hot flame gases into the annular space 4.
  • the pipe sections 7 can be pulled apart relatively widely at their connection points, without the tight connection between the pipe sections or the stability of the flame pipe 3 being impaired thereby. Because of the existing play in the sleeves 8 and in the area of the cover rings 11, the flame tube 3 can also follow relatively large deflections of the casing tube 1 without causing undue stresses in the pipe sections or in the cover rings 11.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
  • Combustion Of Fluid Fuel (AREA)
  • Chimneys And Flues (AREA)
  • Pre-Mixing And Non-Premixing Gas Burner (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Tunnel Furnaces (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)

Claims (8)

1. Tube de chauffage par rayonnement à enveloppe d'un brûleur industriel, comportant un tube-foyer céramique (3) se composant au moins partiellement de pièces tubulaires céramiques individuelles (7, 7a) reliées entre elles côté frontal par ajustement de forme, auxquelles des pièces d'espacement (14, 16) disposées extérieurement et en forme de nervures ou d'ergots sont associées en vue de procurer un appui radial contre un tube enveloppe (1) entourant le tube-foyer, les pièces tubulaires étant chaque fois réalisées à une extrémité sous la forme d'un manchon (8) et à l'autre extrémité avec une zone cylindrique (9) s'adaptant à ce dernier, caractérisé en ce que des pièces tubulaires (7, 7a) se raccordant, l'une à l'autre sont enfoncées l'une dans l'autre avec un certain jeu aux emplacement de la liaison par manchon et en ce que, dans la zone de ces emplacements de liaison par manchon, une bague de recouvrement céramique (11) est chaque fois appliquée extérieurement avec un certain jeu sur le tube-foyer (3), bague qui est fixée en direction axiale sur le tube-foyer (3), par ajustement de forme, s'étend axialement sur une partie de la zone cylindrique (9) de chaque pièce tubulaire (7, 7a), et recouvre le manchon (8) associé au moins partiellement.
2. Tube de chauffage par rayonnement à enveloppe selon la revendication 1, caractérisé en ce que la bague de recouvrement (11) s'étend en direction axiale au-delà du manchon (8).
3. Tube de chauffage par rayonnement à enveloppe selon la revendication 1, caractérisé en ce que chaque pièce tubulaire (7, 7a) porte sur l'extrémité opposée au manchon (8) un épaulement annulaire (10) servant d' appui axialement à la bague de recouvrement (11 ).
4. Tube de chauffage par rayonnement à enveloppe selon l'une des revendications précédentes, caractérisé en ce que la pièce tubulaire (7a) voisine du brûleur est montée par son extrémité située côté manchon sur une pièce d'embouchure de brûleur (5) céramique et en ce qu'une bague de raccordement (15) adjacente à la pièce d'embouchure du brûleur (5) est introduite avec un certain jeu dans le manchon (8) de cette pièce tubulaire (7a).
5. Tube de chauffage par rayonnement à enveloppe selon la revendication 4, caractérisé en ce que la bague de raccordement (15) porte sur sa face périphérique extérieure des pièces d'espacement (16).
6. Tube de chauffage par rayonnement à enveloppe selon l'une des revendications précédentes, caractérisé en ce que les pièces d'espacement (14), sont disposées sur la face périphérique extérieure des bagues de recouvrement (11 ).
7. Tube de chauffage par rayonnement à enveloppe selon la revendication 6, caractérisé en ce qu'une bague de recouvrement (11) portant des pièces d'espacement (14) est montée sur la pièce tubulaire (7) située à l'extrémité, selon une orientation tournée de 180° par rapport aux autres bagues d'espacement.
8. Tube de chauffage par rayonnement à enveloppe selon l'une des revendications précédentes, caractérisé en ce que les pièces tubulaires (7, 7a) se composent de carbure de silicium pur.
EP85114525A 1984-12-28 1985-11-15 Tube foyer céramique pour le tuyau de chauffage à rayonnement d'un brûleur industriel Expired - Lifetime EP0191910B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85114525T ATE49650T1 (de) 1984-12-28 1985-11-15 Keramisches flammrohr fuer das mantelstrahlheizrohr eines industriebrenners.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3447603 1984-12-28
DE3447603A DE3447603C2 (de) 1984-12-28 1984-12-28 Keramisches Flammrohr für das Mantelstrahlheizrohr eines Industriebrenners

Publications (2)

Publication Number Publication Date
EP0191910A1 EP0191910A1 (fr) 1986-08-27
EP0191910B1 true EP0191910B1 (fr) 1990-01-17

Family

ID=6254010

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85114525A Expired - Lifetime EP0191910B1 (fr) 1984-12-28 1985-11-15 Tube foyer céramique pour le tuyau de chauffage à rayonnement d'un brûleur industriel

Country Status (11)

Country Link
EP (1) EP0191910B1 (fr)
JP (1) JPS61173018A (fr)
AT (1) ATE49650T1 (fr)
CZ (1) CZ278206B6 (fr)
DE (2) DE3447603C2 (fr)
DK (1) DK160644C (fr)
HU (1) HUT41886A (fr)
NO (1) NO855058L (fr)
PL (1) PL154687B1 (fr)
SU (1) SU1438627A3 (fr)
YU (1) YU44697B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7886675B2 (en) 2005-11-14 2011-02-15 Thermetic Products, Inc. Fuel ignition systems

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2616518B1 (fr) * 1987-06-11 1990-11-30 Gaz De France Tube interne en ceramique notamment pour tube radiant en doigt de gant a recirculation
FR2616520B1 (fr) * 1987-06-11 1989-10-27 Gaz De France Systeme a bruleur notamment a grande vitesse de sortie des gaz brules
EP0321611A1 (fr) * 1987-12-22 1989-06-28 Franco Andreoli Tube foyer pour tube chauffant à radiation pour four industriel
DE3915957A1 (de) * 1989-05-18 1990-11-22 Lbe Beheizungseinrichtungen Mantelstrahlheizrohr
DE4132235C1 (fr) * 1991-09-27 1992-08-13 Ws Waermeprozesstechnik Gmbh, 7253 Renningen, De
WO2000008385A1 (fr) * 1998-08-03 2000-02-17 Igor Nikolaevich Nikolaev Procede de combustion de carburant et dispositif de mise en oeuvre de ce procede
ATE511062T1 (de) * 2007-07-20 2011-06-15 Shell Int Research Heizvorrichtung zur flammenlosen verbrennung
DE102007040788B4 (de) 2007-08-28 2009-06-25 Ibs Industrie-Brenner-Systeme Gmbh Rohrelement
WO2010125550A2 (fr) * 2009-04-27 2010-11-04 Kingspan Holdings (Irl) Limited Collecteur solaire
RU171677U1 (ru) * 2016-12-23 2017-06-09 Елизавета Евгеньевна Беркович Керамический фитинг для дымохода из керамических труб

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2105533A (en) * 1934-01-19 1938-01-18 Selas Company Gas burning apparatus
GB564523A (en) * 1943-03-12 1944-10-02 John Fallon Improvements in gas-fired tubular heaters
US2478732A (en) * 1948-04-01 1949-08-09 Wilson Combustion tube heating apparatus
GB716579A (en) * 1952-03-27 1954-10-06 Internat Furnace Equipment Com Radiant-heating elements for furnaces
US3309072A (en) * 1962-06-04 1967-03-14 Shenango Ceramics Inc Recuperator tubes
CH496919A (de) * 1967-12-12 1970-09-30 Fetok Gmbh Strahlungsrohreinrichtung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7886675B2 (en) 2005-11-14 2011-02-15 Thermetic Products, Inc. Fuel ignition systems

Also Published As

Publication number Publication date
JPH022043B2 (fr) 1990-01-16
HUT41886A (en) 1987-05-28
CS8509903A2 (en) 1991-10-15
YU44697B (en) 1990-12-31
NO855058L (no) 1986-06-30
PL154687B1 (en) 1991-09-30
JPS61173018A (ja) 1986-08-04
CZ278206B6 (en) 1993-10-13
SU1438627A3 (ru) 1988-11-15
PL256900A1 (en) 1986-11-18
YU205085A (en) 1989-02-28
DK160644C (da) 1991-09-02
DE3447603A1 (de) 1986-07-03
DE3575464D1 (de) 1990-02-22
ATE49650T1 (de) 1990-02-15
DK562485A (da) 1986-06-29
EP0191910A1 (fr) 1986-08-27
DE3447603C2 (de) 1987-02-05
DK160644B (da) 1991-04-02
DK562485D0 (da) 1985-12-04

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