EP0122320B1 - Brûleur produisant un courant de gaz chaud, particulièrement pour contraction de feuilles en matière plastique - Google Patents

Brûleur produisant un courant de gaz chaud, particulièrement pour contraction de feuilles en matière plastique Download PDF

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Publication number
EP0122320B1
EP0122320B1 EP83108410A EP83108410A EP0122320B1 EP 0122320 B1 EP0122320 B1 EP 0122320B1 EP 83108410 A EP83108410 A EP 83108410A EP 83108410 A EP83108410 A EP 83108410A EP 0122320 B1 EP0122320 B1 EP 0122320B1
Authority
EP
European Patent Office
Prior art keywords
burner
guide plates
combustion chamber
pipe
pressure distribution
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
Application number
EP83108410A
Other languages
German (de)
English (en)
Other versions
EP0122320A1 (fr
Inventor
Reiner W. Hannen
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.)
MSK Verpackungs Systeme GmbH
Original Assignee
MSK Verpackungs Systeme 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 MSK Verpackungs Systeme GmbH filed Critical MSK Verpackungs Systeme GmbH
Priority to AT83108410T priority Critical patent/ATE20492T1/de
Publication of EP0122320A1 publication Critical patent/EP0122320A1/fr
Application granted granted Critical
Publication of EP0122320B1 publication Critical patent/EP0122320B1/fr
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
    • F23D14/74—Preventing flame lift-off
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/48—Nozzles
    • F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
    • F23D14/583—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration of elongated shape, e.g. slits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D91/00—Burners specially adapted for specific applications, not otherwise provided for
    • F23D91/02—Burners specially adapted for specific applications, not otherwise provided for for use in particular heating operations

Definitions

  • the invention relates to a burner for generating a hot gas stream, in particular for shrinking plastic film.
  • a pressure distribution chamber connected to a feed for a gas mixture with a fan-shaped plan, which at its broad end merges into a combustion chamber with a burner outlet, the combustion chamber having an elongated cross section and wherein in the transition region between the pressure distribution chamber and the combustion chamber, the pressure distribution chamber extends over the entire width or combustion chamber extending tube is arranged as a flame holder, which forms passage gaps for the gas mixture with the adjacent walls.
  • Such burners are needed to shrink plastic films, e.g. B. in the form of hoods that are drawn onto a stack of goods located on a pallet.
  • the shrinking can be done with handheld devices, but also with stationary installed, automatically working systems.
  • shrinking plastic film it is important that a uniform, flame-free hot gas flow is generated.
  • the widest possible outlet of the burner exhaust gases is sought.
  • the combustion chamber and its outlet are therefore given an elongated cross section.
  • the flame holder in such burners is intended to even out the pressure distribution of the gases flowing into the combustion chamber and also to promote the mixing of combustible gases with oxygen-containing gases.
  • a burner of the type described above (DE-U-8 220 335) has a tube as a flame holder. a simple structure that guarantees reliable and consistent properties, because the rod-like flame holder can be positioned very precisely using simple means.
  • the tube divides the gas stream entering the combustion chamber. The partial flows entering the combustion chamber through the passage gaps between the tube and the adjacent walls are drawn into the center of the combustion chamber under the effect of the dead water formed behind the tube and put less strain on the walls of the combustion chamber during their combustion, but this is also associated with an intensive one Swirling of the gases, which accordingly leave the burner outlet with high turbulence. The high turbulence reduces the jet speed of the hot gas jets emerging from the burner outlet. At the same time, noise is also reduced.
  • the object of the invention is to improve a burner of the type described above in such a way that, with reduced or constant noise generation, the exit speed increases and thereby the admixture of cold ambient air in the hot gas jet leaving the burner is increased.
  • This object is achieved in that a series of curved baffles is placed on the tube downstream, the free ends of which are directed towards the burner outlet.
  • baffles initially support the effect of the tubular flame holder with regard to thorough mixing of the gases flowing into the combustion chamber. Accordingly, they also stabilize the flame downstream of the flame holder. At the same time, however, the guide plates ensure that the hot gas flow is still directed inside the combustion chamber, specifically towards the outlet, which as a result also significantly increases the exit speed. As a result, the hot gas jet outside the burner entrains more cold ambient air, which mixes with the hot gases and lowers their temperature.
  • baffles extend between the opposing walls of the combustion chamber and connect to them, the entire hot gas flow is detected, deflected and directed by the baffles. All guide vanes can have curvatures of the same size and the same size.
  • the free ends of the vanes should be about 3/5 the length of the vanes. It is favorable if the tubes are covered by the legs of the rider-like guide plates over a height that corresponds to about 1/4 tube diameter.
  • the burner 1 shown in the drawing is used to generate a hot gas stream. It is used for shrinking plastic film. e.g. B. of shrink hoods that are pulled onto a pallet stack.
  • the basic structure of the burner consists of a mixture supply pipe 2 to which a pressure distribution chamber 3 is attached fan-shaped plan (Fig. 1) connects.
  • the pressure distribution chamber 3 merges into a combustion chamber 4 with an outlet 5.
  • the pressure distribution chamber 3 and also the combustion chamber 4 have an elongated rectangular cross section, onto which the side walls 6, 7 of the pressure distribution chamber 3 converge. These side walls 6, 7 of the pressure distribution chamber 3 merge into adjoining side walls 9, 10 of the combustion chamber 4 with a bend 8.
  • the combustion chamber 4 has a length C which is greater than its height H. In the embodiment shown, the length C of the combustion chamber is 32 mm and its height H is 15 mm.
  • the width L of the combustion chamber and thus also the width of the pressure distribution chamber in the transition area is 185 mm in the embodiment shown.
  • a flame holder is arranged over the entire width of the tube 11, which is attached essentially symmetrically to the bend 8 and which with the adjacent side walls 6, 7 and 9, 10 passage gaps 12, 13 are more constant Forms gap thickness for the gas mixture.
  • the pressure distribution chamber 3 has internals which, in the embodiment shown, are formed from a sheet 14 which extends essentially transversely through the pressure distribution chamber 3 and with the side walls 6, 7 of the pressure distribution chamber 3 passage gaps 15 and 16 forms.
  • the sheet 14 is folded in the middle, so that two legs are formed at an angle of about 117 ° to each other, which are attached to the side walls 6, 7 of the pressure distribution chamber 3 in the area of their common folded edge 17.
  • the legs as shown, extend in the direction of the combustion chamber and ensure that the gases flowing out of the mixture supply pipe 2 are distributed such that they enter the combustion chamber 4 at the same pressure and the same amount. It is not shown that the sheet 14 can also be perforated.
  • a nozzle 18 can be attached in the thread 19.
  • a row of curved baffles 20 is placed on the downstream side of the tube 11 serving as the flame holder.
  • the free ends 21 of the guide plates 20 are directed towards the outlet 5 of the burner.
  • the baffles 20 extend between the opposing side walls 9, 10 of the combustion chamber 4 and adjoin these side walls.
  • all guide plates 20 are aligned and have radii of curvature of the same size.
  • the radius of curvature in the embodiment shown is 12.5 mm and thus essentially corresponds to the diameter K of the tube 11.
  • the tube diameter K is 12 mm in the embodiment shown.
  • the distance G of the guide plates 20 from each other in the illustrated embodiment is 17 mm and thus approximately 1.5 times the pipe diameter.
  • the guide plates 20 have a thickness F of 1 mm.
  • the free ends 21 of the baffles 20 have a length B of 10 mm and thus a length which corresponds to approximately 3/5 of the length D of 13 mm of the baffles 20 extending in the flow direction.
  • the baffles 20 are placed on the tube 11 so that the tube 11 is covered by the legs 22, 23 of the rider-type baffles 20 mounted over a height E of 3 mm, which corresponds to about 1/4 tube diameter.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)

Claims (7)

1. Brûleur (1) servant à engendrer un courant de gaz chaud, en particulier pour la contraction de feuilles de matière synthétique, présentant une chambre de distribution de pression (3) de forme en éventail dans le plan raccordée à une amenée (2) destinée à un mélange de gaz et qui rejoint à son extrémité large une chambre de combustion (4) munie d'une sortie de brûleur (5), la chambre de combustion (4) présentant une section allongée, et un tube (11) qui s'étend sur toute la largeur de la chambre de distribution de pression (3) ou de la chambre de combustion (4) et qui forme avec les parois voisines des interstices de passage (12, 13) pour le mélange de gaz étant disposé comme accrocheur de flamme dans la région de transition entre chambre de distribution de pression (3) et chambre de combustion (4), caractérisé en ce que sur le tube (11) est posée à cheval, vers l'aval, une série de déflecteurs courbes (20) dont les extrémités libres (21) sont tournées vers la sortie (5) du brûleur.
2. Brûleur selon la revendication 1, caractérisé en ce que les déflecteurs (20) s'étendent entre les parois opposées entre elles (9, 10) de la chambre de combustion (4) et se raccordent à celles-ci.
3. Brûleur selon l'une des revendications 1 et 2, caractérisé en ce que tous les déflecteurs (20) présentent des rayons de courbure de même sens et de même grandeur.
4. Brûleur selon l'une des revendications 1 à 3, caractérisé en ce que le rayon de courbure des déflecteurs (20) correspond à peu près au diamètre du tube.
5. Brûleur selon l'une des revendications 1 à 4, caractérisé en ce que l'espacement mutuel (G) des déflecteurs (20) correspond à peu près à 1,5 fois le diamètre (K) du tube.
6. Brûleur selon l'une des revendications 1 à 5, caractérisé en ce que les extrémités libres (21) des déflecteurs (20) présentent une longueur (B) d'environ 3/5 de la longueur (D) des déflecteurs (20).
7. Brûleur selon l'une des revendications 1 à 6, caractérisé en ce que le tube (11) est recouvert par les ailes (22, 23) des déflecteurs (20) posés à cheval, sur une hauteur (E) qui correspond à peu près à 1/4 du diamètre (K) du tube.
EP83108410A 1983-04-08 1983-08-26 Brûleur produisant un courant de gaz chaud, particulièrement pour contraction de feuilles en matière plastique Expired EP0122320B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83108410T ATE20492T1 (de) 1983-04-08 1983-08-26 Brenner zur erzeugung eines heissgasstromes, insbesondere zum schrumpfen von kunststoffolie.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19838310308U DE8310308U1 (de) 1983-04-08 1983-04-08 Brenner zur erzeugung eines heissgasstromes, insbesondere zum schrumpfen von kunststoffolie
DE8310308U 1983-04-08

Publications (2)

Publication Number Publication Date
EP0122320A1 EP0122320A1 (fr) 1984-10-24
EP0122320B1 true EP0122320B1 (fr) 1986-06-18

Family

ID=6752047

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83108410A Expired EP0122320B1 (fr) 1983-04-08 1983-08-26 Brûleur produisant un courant de gaz chaud, particulièrement pour contraction de feuilles en matière plastique

Country Status (5)

Country Link
US (1) US4548578A (fr)
EP (1) EP0122320B1 (fr)
JP (1) JPS6036814A (fr)
AT (1) ATE20492T1 (fr)
DE (2) DE8310308U1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19859829A1 (de) * 1998-12-23 2000-06-29 Abb Alstom Power Ch Ag Brenner zum Betrieb eines Wärmeerzeugers
CA2351072C (fr) * 2000-06-22 2007-04-24 Sharjan Venture Ltd. Combustible gazeux et bruleur a oxygene
JP6236914B2 (ja) * 2013-06-25 2017-11-29 株式会社Ihi グランドフレア

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8220335U1 (de) * 1982-10-21 Msk - Verpackungs-Systeme Gmbh, 4192 Kalkar Brenner zur Erzeugung eines Heißgasstromes, insbesondere zum Schrumpfen von Kunststoffolie
US4462795A (en) * 1980-08-28 1984-07-31 Coen Company, Inc. Method of operating a wall fired duct heater

Also Published As

Publication number Publication date
US4548578A (en) 1985-10-22
EP0122320A1 (fr) 1984-10-24
JPH0373770B2 (fr) 1991-11-22
JPS6036814A (ja) 1985-02-26
DE3364192D1 (en) 1986-07-24
DE8310308U1 (de) 1983-07-21
ATE20492T1 (de) 1986-07-15

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