EP0534104B1 - Mantelstrahlheizrohr - Google Patents

Mantelstrahlheizrohr Download PDF

Info

Publication number
EP0534104B1
EP0534104B1 EP92113411A EP92113411A EP0534104B1 EP 0534104 B1 EP0534104 B1 EP 0534104B1 EP 92113411 A EP92113411 A EP 92113411A EP 92113411 A EP92113411 A EP 92113411A EP 0534104 B1 EP0534104 B1 EP 0534104B1
Authority
EP
European Patent Office
Prior art keywords
tube
radiant heater
heater according
jacketed jet
jacketed
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
EP92113411A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0534104A2 (de
EP0534104A3 (en
Inventor
Joachim Dr.-Ing. Wünning
Joachim G. Dipl.-Ing. Wünning
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.)
WS Warmeprozesstechnik GmbH
Original Assignee
WS Warmeprozesstechnik GmbH
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 WS Warmeprozesstechnik GmbH filed Critical WS Warmeprozesstechnik GmbH
Publication of EP0534104A2 publication Critical patent/EP0534104A2/de
Publication of EP0534104A3 publication Critical patent/EP0534104A3/de
Application granted granted Critical
Publication of EP0534104B1 publication Critical patent/EP0534104B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
    • 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, in particular for heating furnace rooms of industrial furnaces, with a jacket tube and a flame tube arranged therein, to which a burner is assigned at one end, and which is composed of butt-lined pipe sections and has continuous exhaust gas ducts which enter into between the jacket tube and the flame tube formed ring channel, wherein the flame tube is centered with associated spacing means with respect to the jacket tube.
  • the flame tube made up of several in succession arranged to assemble hollow cylindrical ceramic parts that interlock positively and cemented together.
  • Such flame tubes are difficult to manufacture and are sensitive to the deflections that inevitably occur during operation.
  • the ceramic flame tube is likewise composed of pipe pieces or circular ring parts, of which the end ring part adjoining the end pipe wall is provided with radial exhaust gas passages and, like the other circular ring parts, is provided with radial spacing ribs on the outer surface.
  • the object of the invention is therefore to remedy this situation and to provide a jacket radiant tube in which, with a simple shape of the flame tube and its parts, maximum flow cross sections are provided for the exhaust gas circulation and simple measures can be used to achieve appropriate flow guidance of the gas circulation.
  • the jacket-type radiant tube mentioned at the outset is characterized according to the invention in that the pipe sections which are lined up are connected to one another by brackets.
  • brackets ensure an exact mutual assignment of the pipe sections, which is retained even under operating conditions.
  • the clips are consistently attached to the outside of the pipe sections, although for special embodiments it would also be conceivable to use internal clips.
  • the brackets can be designed to act as a spacing means, which offers an optimal possibility of adaptation to variable jacket tube diameters with unchanged flame tube dimensions.
  • at least two pipe sections can be arranged at an axial distance from one another, forming a slot acting as an exhaust gas duct.
  • Such slots of larger width which are deliberately chosen by corresponding arrangements of the design of the clips, thus allow the temperature distribution and the circulating flow to be influenced favorably.
  • the overtemperature ranges which usually occur in the region of the flow reversal when the flame tube is closed can largely be avoided in this way.
  • At least a part of the pipe sections can carry projections which enlarge the heat-dissipating surface and which, for example, can be rib-shaped. This increase in the heat transfer area and the resulting increased turbulence of the exhaust gas flow can improve the heat transfer in certain areas.
  • the Brackets designed in the manner of tabs, which are connected to the pipe pieces by means of positive locking means.
  • These holding means can have bolt-like holding elements which are inserted into corresponding holes in the wall of the pipe sections and / or the tabs. It has proven to be advantageous if the bolt-shaped mounting elements each have a widened head part, and they can simultaneously serve to center the flame tube in the jacket tube. For example, by appropriate dimensioning of the head part, it can also be adapted to the inside diameter of the respective casing tube.
  • the pipe sections, the clamps and their holding means can at least partially consist of ceramic material. They can be produced in a simple form, which also applies if the pipe pieces and / or the clamps and / or their holding means are made of a heat-resistant metal, for example in the form of a special alloy.
  • the jacket radiant tube shown in the drawing is used in particular for heating furnace rooms in industrial furnaces. It has a cylindrical barbell tube 1 which is closed at one end at 2 and which is inserted in the region of its other end in a sealed manner into the wall of an oven chamber (not shown) which is indicated at 3.
  • a cylindrical coaxial flame tube 4 is arranged in the jacket tube and, with the inner wall of the jacket tube 1, delimits an annular channel 5 which is continuous over the axial length and opens into an exhaust gas collecting chamber 6 (FIG. 1), which in the area of a closure piece 7 closing the jacket tube 1 is arranged. From the exhaust gas collecting space 6 there is an exhaust pipe 8, via which the exhaust gas arising during the combustion is discharged.
  • a burner is arranged coaxially to the flame tube 4 and has a combustion chamber 10 which projects into the flame tube 4 and is provided with a burner nozzle, indicated at 11, through which the flame enters the flame tube 4.
  • the combustion chamber 10 is followed by an air guide cylinder for the combustion air, which is introduced into the air guide cylinder 12 via a feed pipe 13.
  • the fuel is supplied through a coaxial fuel lance 14 which opens into the combustion chamber and is connected to a fuel supply nozzle 15.
  • the cylindrical flame tube 4 which is at some distance from the jacket pipe end wall 2, is composed of individual cylindrical, preferably ceramic pipe pieces 16 which are butted together.
  • the pipe sections 16 have the same inside and outside diameters; their axial length can be different.
  • the pipe sections 16 are each provided with a chamfer or bevel 17 or 18, which are formed all around and are arranged on one pipe section end - at 17 - on the outside and on the other pipe section end - at 18 - on the inside. Adjacent bevels 17, 18, as can be seen in FIG. 2, are essentially aligned.
  • brackets 19 which are attached to the outside of the pipe sections 16 and lie in the ring channel 5.
  • brackets 19 are provided per connection point, which are arranged evenly distributed around the circumference of the interconnected pipe sections 16.
  • Each of the brackets 19 has a narrow, elongated, strip-like tab of relatively small thickness, which is formed in the region of its two ends with two through holes 21 (FIG. 3), through which mounting bolts 22 protrude, into corresponding holes 23 in the wall the pipe sections 16 are inserted.
  • Fig. 3 shows that the tabs 20 are flat and limited parallel flanks, as is sufficient for larger outer diameters of the pipe sections 16. In the case of smaller outer diameters in particular, however, it can also be expedient to produce the tabs 20 in the manner of cutouts from a circular ring segment in order to adapt them to the outer contour of the tube pieces 16.
  • Each of the bolts 22 is formed with a widened head part 24 which rests on the associated tab 20 on the outside and the axial height of which is selected such that the bolts 22 act directly as spacers which center the flame tube 4 in the surrounding jacket tube 1.
  • By choosing bolts 22 with the appropriate height of the head part 24 can, for example. with unchanged flame tube diameter, an adaptation to different diameters of the casing tube 1 can be achieved.
  • the bolts 22 are simply plugged together with the tabs 20 and the pipe sections 16, the whole being held together in an inseparable manner in the assembled state by the casing pipe 1 surrounding it, very simple manufacturing and assembly conditions result for the flame pipe 4, the individual pipe sections 16 of which in Can also be easily replaced if necessary.
  • the brackets 19 because of their rigid positive attachment to the pipe sections 16 to be connected to one another, a perfect, exactly correct mutual fixing of the pipe sections 16 connected to one another
  • Adjacent pipe sections 16 can be arranged essentially directly abutting one another by appropriate arrangement of the holes 23 intended for receiving the bolts 22, such that the adjacent bevels 17, 18 mesh with one another and at the separation point only a small one, to ensure the necessary flexibility of the flame pipe 4 Required slot 25 (Fig.1) remains, the width of which can be approximately in the range of one mm.
  • This small slot 25 has in particular also because of the bevels 17, 18 no influence on the circulating flow formed in the ring channel 5; it also does not give rise to local overheating of the casing tube 1 in its vicinity.
  • the brackets 19 also allow, by simply changing the arrangement of the holes 23 of the pipe sections 16 between adjacent pipe sections, to deliberately set a larger slot 26, which has a precisely defined width and acts as an exhaust gas duct.
  • the temperature distribution over the length of the casing tube 1 and the exhaust gas circulation flow maintained in the annular channel 5 can be favorably influenced by appropriate arrangement and dimensioning of these slots 26, through which the exhaust gas flows indicated at 27 in FIG. 2 emerge.
  • the rectified bevels 17, 18 bounding the respective slot 26 also contribute to this 2 are directed in such a way that exhaust gas flows emerging from the interior of the flame tube 4 receive a flow component directed upwards in FIG. 2, ie in the direction of the circulating flow indicated by arrows 28.
  • the tube pieces 16, tabs 20 and / or the bolts 22 can be made of ceramic and / or heat-resistant special alloys because of their simple shape, i.e. Made of materials whose design options are limited due to the material properties.
  • the ceramic pipe sections 16, the z. B. consist of SiC can - as can be seen from Fig.1 - be smooth-walled outside. It can also be used at a suitable point of the flame tube 4 but also pipe pieces 16a (FIG. 1) which have projections formed on their outer circumference, for example in the form of parallel longitudinal ribs 29, which increase the heat-transferring surface and increase turbulence Improve heat transfer with the exhaust gases flowing outside.
  • the flexible flame tube 4 assembled from the tube pieces 16 in the manner described is also connected to the burner 9 by means of clips 19, the tabs 20 and bolts 22 of which can be seen in FIG. 1.
  • the brackets 19 hold the terminal pipe section 16a at such an axial distance from the burner nozzle 11 that the relatively large annular gap 30 which remains free, and which is indicated by arrows 31, can be sucked into the flame tube 4 by the injector effect by means of the arrows 31, which are circulated via the annular channel 5.
  • the tabs 20 carry such spacing elements, for example in the form of molded bumps or ribs, which take over the centering task.
  • the casing tube 1 can also consist of steel, ceramic (for example SiC) or heat-resistant special alloys (including sintered materials).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Gas Burners (AREA)
  • Combustion Of Fluid Fuel (AREA)
  • Materials For Medical Uses (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
EP92113411A 1991-09-27 1992-08-06 Mantelstrahlheizrohr Expired - Lifetime EP0534104B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4132235A DE4132235C1 (ja) 1991-09-27 1991-09-27
DE4132235 1991-09-27

Publications (3)

Publication Number Publication Date
EP0534104A2 EP0534104A2 (de) 1993-03-31
EP0534104A3 EP0534104A3 (en) 1993-08-04
EP0534104B1 true EP0534104B1 (de) 1995-11-02

Family

ID=6441645

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92113411A Expired - Lifetime EP0534104B1 (de) 1991-09-27 1992-08-06 Mantelstrahlheizrohr

Country Status (6)

Country Link
US (1) US5305732A (ja)
EP (1) EP0534104B1 (ja)
JP (1) JPH05296422A (ja)
KR (1) KR930006424A (ja)
AT (1) ATE129797T1 (ja)
DE (2) DE4132235C1 (ja)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19536706A1 (de) * 1995-10-02 1997-04-03 Lbe Beheizungseinrichtungen Mantelstrahlheizrohr
HUP9800902A1 (hu) * 1998-04-17 2000-02-28 Reactor Combustion World Organisation Modulrendszerű kerámia égetőreaktor
SE527766C2 (sv) * 2004-10-22 2006-05-30 Sandvik Intellectual Property Förfarande för förbränning med brännare för industriugnar, jämte brännare
JP5066414B2 (ja) * 2007-09-13 2012-11-07 Ｊｘ日鉱日石エネルギー株式会社 改質装置
DE102013106786A1 (de) 2013-06-28 2014-12-31 Jasper Gesellschaft für Energiewirtschaft und Kybernetik mbH Heizrohr für einen Rekuperatorbrenner
KR101725445B1 (ko) * 2015-02-27 2017-04-11 두산중공업 주식회사 콜 버너의 도관간 간격 조절용 핀 및 덕트 오프닝 홀
EP3614048B1 (de) 2018-08-24 2020-10-14 Schunk Ingenieurkeramik GmbH Mantelstrahlheizrohr
FR3102233A1 (fr) * 2019-10-22 2021-04-23 Atelier Dominique Imbert Cheminée à foyer suspendu

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
DE2314118C2 (de) * 1973-03-21 1979-10-11 Fa. J. Aichelin, 7015 Korntal Flammrohr für ein Mantelstrahlheizrohr eines Industrieofens
GB2128727B (en) * 1982-09-29 1985-08-29 British Gas Corp Heating elements
US4512159A (en) * 1984-04-02 1985-04-23 United Technologies Corporation Clip attachment
DE3447603A1 (de) * 1984-12-28 1986-07-03 Aichelin GmbH, 7015 Korntal-Münchingen Keramisches flammrohr fuer das mantelstrahlheizrohr eines industriebrenners

Also Published As

Publication number Publication date
ATE129797T1 (de) 1995-11-15
JPH05296422A (ja) 1993-11-09
DE59204189D1 (de) 1995-12-07
DE4132235C1 (ja) 1992-08-13
US5305732A (en) 1994-04-26
KR930006424A (ko) 1993-04-21
EP0534104A2 (de) 1993-03-31
EP0534104A3 (en) 1993-08-04

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