EP0291372A1 - Gasbrenner mit kalter Düse - Google Patents

Gasbrenner mit kalter Düse Download PDF

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Publication number
EP0291372A1
EP0291372A1 EP88400962A EP88400962A EP0291372A1 EP 0291372 A1 EP0291372 A1 EP 0291372A1 EP 88400962 A EP88400962 A EP 88400962A EP 88400962 A EP88400962 A EP 88400962A EP 0291372 A1 EP0291372 A1 EP 0291372A1
Authority
EP
European Patent Office
Prior art keywords
burner
grid
burner according
deflectors
diffusion grid
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.)
Granted
Application number
EP88400962A
Other languages
English (en)
French (fr)
Other versions
EP0291372B1 (de
Inventor
Claude Courrege
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.)
Sefmat
Original Assignee
Stepack SARL
Sefmat
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 Stepack SARL, Sefmat filed Critical Stepack SARL
Publication of EP0291372A1 publication Critical patent/EP0291372A1/de
Application granted granted Critical
Publication of EP0291372B1 publication Critical patent/EP0291372B1/de
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
    • 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
    • F23D14/70—Baffles or like flow-disturbing devices
    • 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
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
    • F23D14/08—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with axial outlets at the burner head
    • 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

Definitions

  • the present invention relates to a gas burner, of the cold nozzle type, capable of carrying out external combustion of a gas mixture at high speed.
  • plastic films for example polyethylene films with a view to their shrinking
  • a gaseous flow originating from the combustion of a combustible gas such as propane and air.
  • the burner must therefore be designed so as to produce a gas flow having a temperature of the order of 120 ° to 540 ° C at a predetermined distance from the burner (distance at which the plastic film treat must be arranged).
  • the temperature must be relatively homogeneous and the gas flow free of burning material, if one wishes to avoid any possibility of burning, scorching and blistering of the film.
  • a burner comprising an injection device capable of producing a flow of combustible gas mixture at high speed and of injecting this flow into a burner head of tubular shape comprising successively: a pressure recovery chamber having, in the plane of symmetry of the head, a divergent shape and inside which the gas mixture coming from the injection device develops in a fan configuration, - an ignition chamber of substantially constant and rectangular section, two deflectors which respectively extend the two long sides of the ignition chamber, and which converge from one to the other, these two deflectors having two rectilinear front edges forming between them a passage of reduced width, and - A diffusion grid, of substantially semi-cylindrical shape fixed inside the head at the junction of the two chambers, this grid forming a curved partition, oriented parallel to said edges, in said plane of symmetry, and whose concavity is oriented towards the inside of the pressure recovery chamber.
  • the front front of this flame has in its central region a substantially straight front bordered, laterally by two respective projections in the shape of a horn.
  • a first object of the invention is therefore to eliminate this drawback.
  • burners of this kind are most commonly used as "hand burners” and consequently include a handle which the operator holds in his hand.
  • the invention therefore also aims to eliminate this drawback.
  • the invention provides a burner of the aforementioned type, more particularly characterized in that the front edges of the two long sides of the ignition chamber, on which the deflectors are connected, the front edges of the deflectors and the grate. diffusion have substantially coaxial circular shapes.
  • the burner according to the invention comprises an injection device 1 capable of transmitting to the head of the burner 2, a flow of combustible gaseous mixture.
  • the injection device 1 more particularly involves: a tube 3 formed in two sections, namely a convergent rear section 4 and a substantially divergent front section 5, an injection nozzle 6 mounted in the converging section 4, this nozzle 6 being connected to a source of flammable gas having a pressure of the order of 3 to 4 bars, and - at least one air passage opening 7 located in the annular zone between said nozzle 6 and said section 4.
  • This device therefore forms a jet pump which drives the air coming from the opening 7 and generates in the converging portion 4 of the pipe 3 (point I) a flow of gaseous mixture at high speed, of the order of 12660 meters. /minute.
  • this speed gradually decreases (point J1 at 6000 meters / min, point J2 at 5000 meters / min, point K at 3500 meters / min) to reach the inlet of the burner head 2 at a speed which however remains relatively high (point L of the order of 1000 meters / min).
  • the burner head 2 of tubular shape, is made up of two parts which successively delimit a pressure recovery chamber 10 which is connected to the pipe and an ignition chamber 11 which opens into the open air.
  • the pressure recovery chamber 10 has, beyond its zone of connection to the pipe 3, a flared shape delimited by two converging walls 12, 13, of increasing width and two diverging side walls 14, 15 of decreasing width. As can be seen in Figures 2 and 3, the front edges 16, 17 of the two walls converging 12, 13 have coaxial circular shapes.
  • the ignition chamber 11 also has a flared shape. However, in this example, it is delimited by two parallel walls 18, 19 which extend the two converging walls 12, 13, and two divergent side walls 20, 21 which extend the side walls 14, 15, respectively along the same orientations.
  • the front edges 22, 23 of the two walls 18, 19 are circular and extend coaxially to the edges 16, 17.
  • a diffusion grid 24 which consists of a piece of perforated sheet metal having the shape of a toric sector of substantially semi-cylindrical section, and whose large radius of curvature corresponds substantially to that of the front edges 16, 17 of the converging walls 12, 13.
  • the lateral edges 24 ′, 24 ⁇ of this grid form, with the two parallel walls 18, 19, gas flow flow corridors in which, as will be explained later, combustion cannot be established.
  • the grid 24 comprises two flanges 25, 26 giving it a shape substantially in ⁇ (omega), that is to say of which the section has a curved shape bordered by two lateral wings.
  • the walls 18 and 19 of the ignition chamber 11 are extended by two deflectors 30, 31 of circular shape which substantially converge towards each other and have two respective edges 32, 33 coaxial forming between them a passage space of width less than the width of the lateral sides 20, 21 of the ignition chamber 11.
  • the combustible mixture forms a succession of again accelerated jets (point N at 2400 m / min).
  • these jets are oriented axially while in the lateral parts, they are substantially radial and abut on the walls 18, 19 and on the deflectors 30, 31.
  • the gas flow coming from the perforations located in the lateral parts of the perforated grid 24 undergoes a deceleration ⁇ V2 much greater than the deceleration ⁇ V1.
  • the gas flow strikes the walls 18, 19 of the ignition chamber 11 and is braked.
  • This gas flow also creates, along the walls 18, 19 and on the deflectors 30, 31, two flow zones at higher pressure with low acceleration (points F, G, H respectively at 600, 650, 800 m / min) in which the flame does not propagate (dead space).
  • the walls 18, 19 of the ignition chamber 11 and the deflectors 30, 31 which are not licked by the flame and are ventilated by the flow of combustible mixture therefore do not heat up and are, on the contrary, constantly cooled.
  • deflectors 30, 31 which serve to deflect the flow zones of the fuel mixture coming from the lateral parts of the grid 24 and to make them slightly converge towards the central region of the gas flow.
  • the front face 40 of the flame 41 also has a coaxial circular shape (FIG. 6).
  • the temperature of the gas flow is substantially homogeneous and isothermal. Beyond this front edge 40, the temperature gradually decreases, with circular isotherms 42, 43, 44 of the type of those which have been shown in FIG. 6.
  • the front front 46 of the flame 47 produced by this burner 2 ′ has a straight central part bordered by two lateral horns 48, 49 projecting.
  • the film will undergo overheating in the lateral region 50 of the gas flow.
  • the invention therefore makes it possible to eliminate these two disadvantages thanks to the fact that it makes it possible to obtain a flame front free of horns and that the circular shape of this flame front eliminates the harmful effects of a variation in orientation of the burner head.
  • the burner according to the invention can be associated with a body 53 in the form of a gun comprising a trigger 54 which controls both the admission of the combustible gas and the ignition circuit of the burner.
  • this ignition circuit may comprise a piezoelectric generator actuated by the trigger 54 and a spark plug 55 opening into the ignition chamber 11.
  • the invention therefore proposes to solve this problem by placing, in the central area of the ignition chamber 11, a low-rise obstacle pressed tightly against the grid 24, so as to create a local disturbance of the gas streams itself generating areas at low speed where combustion can be established and propagated without generating a combustion zone under the obstacle.
  • This obstacle can extend over all or part of the central area of the diffusion grid 24 or, possibly, be arranged obliquely with respect thereto.
  • Figures 7, 8 and 9 show various possibilities for achieving this obstacle.
  • FIGS. 7 and 8 show in cross section obstacles formed by a round wire 60 (FIG. 7) and by a wire of square section 61 (FIG. 8) fixed on the diffusion grid 24.
  • the obstacle is simply obtained by a fold 62 formed on the diffusion grid 24.
  • the diffusion grid 24 could comprise at least over part of its surface a double wall.
  • this grid 24 could be doubled by a finer grid, extending in the pressure distribution chamber or even in the ignition chamber, to avoid possible flashbacks.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
EP88400962A 1987-05-12 1988-04-20 Gasbrenner mit kalter Düse Expired - Lifetime EP0291372B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8706930 1987-05-12
FR8706930A FR2615271B1 (fr) 1987-05-12 1987-05-12 Bruleur a gaz, de type a buse froide

Publications (2)

Publication Number Publication Date
EP0291372A1 true EP0291372A1 (de) 1988-11-17
EP0291372B1 EP0291372B1 (de) 1993-10-27

Family

ID=9351183

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88400962A Expired - Lifetime EP0291372B1 (de) 1987-05-12 1988-04-20 Gasbrenner mit kalter Düse

Country Status (5)

Country Link
US (1) US4886446A (de)
EP (1) EP0291372B1 (de)
JP (1) JPS63286606A (de)
DE (2) DE3885150T2 (de)
FR (1) FR2615271B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0967435A1 (de) * 1998-06-26 1999-12-29 Truma Gerätetechnik GmbH & Co. Zündbrenner
CN101297159B (zh) * 2005-10-28 2011-02-09 Sefmat公司 内点燃式热空气燃烧器/发生器

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9006308U1 (de) * 1990-06-05 1990-08-09 Develog, Reiner Hannen & Cie, Corgémont Handschrumpfgerät
DE69231894T2 (de) * 1991-05-06 2001-11-29 Bowin Designs Pty. Ltd., Brookvale Brenner
DE69420346T2 (de) * 1993-03-25 1999-12-30 Kao Corp., Tokio/Tokyo Dermatologische präparate sowie neue benzoesäure derivate
US5458484A (en) * 1994-05-16 1995-10-17 Carrier Corporation Pre-mix flame type burner
USD379910S (en) * 1994-12-12 1997-06-17 Develog, Reiner Hannen & Cie Hand-held foil-shrinking tool
US7207913B2 (en) * 2003-07-18 2007-04-24 Dade Behring Inc. Bi-directional drivebelt tensioning device
US8246344B1 (en) * 2003-07-29 2012-08-21 Samuel Schrock Gas lamp
US20060186229A1 (en) * 2005-02-22 2006-08-24 Cotler Elliot M Fluid jet nozzle
FR2884594B1 (fr) * 2005-04-18 2007-06-01 Sefmat Sa Bruleur/generateur d'air chaud a allumage interne
US8118477B2 (en) 2006-05-08 2012-02-21 Landmark Structures I, L.P. Apparatus for reservoir mixing in a municipal water supply system
WO2010059630A2 (en) * 2008-11-18 2010-05-27 Zagoroff Dimiter S Ignition system for portable burner
JP5513932B2 (ja) * 2010-03-05 2014-06-04 株式会社Ｎｉｐｐｏ ガスバーナ
US9416960B2 (en) * 2012-04-30 2016-08-16 Bevolo Gas & Electric Lights, Inc. Lighting apparatus
CN110360560B (zh) * 2018-04-09 2020-12-01 中国石油天然气股份有限公司 天然气燃烧助燃装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB685936A (en) * 1950-04-13 1953-01-14 Bray & Co Ltd Geo Improvements in gas burners
FR1317804A (de) * 1963-05-08
FR2109138A5 (de) * 1970-10-02 1972-05-26 Sidemat
FR2172540A5 (de) * 1972-02-17 1973-09-28 Guilbert Leon Et Fils
USRE28665E (en) * 1971-11-10 1975-12-23 Heat gun
EP0006048A1 (de) * 1978-05-29 1979-12-12 Rippes S.A. Brennerkopf für einen Gaslötbrenner

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US554253A (en) * 1896-02-11 Robert gilmour finlay
US1354295A (en) * 1918-03-06 1920-09-28 Esda Mfg Company Gas-burner for water-heaters
US1368120A (en) * 1918-09-26 1921-02-08 Cole Elnathan Gas-burner
US2985233A (en) * 1956-08-03 1961-05-23 Vaillant Joh Kg Bunsen burners
US3035632A (en) * 1957-11-12 1962-05-22 Sievert Ab Max Gas torch for welding of plastic materials
GB1067217A (en) * 1963-05-24 1967-05-03 Franciskus Aloysius Van De Roe Gas burner
ES172978Y (es) * 1968-09-07 1972-12-16 Polidoro Quemador para llama de gas.
US3852025A (en) * 1973-09-28 1974-12-03 Int Magna Corp Infra-red heater

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1317804A (de) * 1963-05-08
GB685936A (en) * 1950-04-13 1953-01-14 Bray & Co Ltd Geo Improvements in gas burners
FR2109138A5 (de) * 1970-10-02 1972-05-26 Sidemat
USRE28665E (en) * 1971-11-10 1975-12-23 Heat gun
FR2172540A5 (de) * 1972-02-17 1973-09-28 Guilbert Leon Et Fils
EP0006048A1 (de) * 1978-05-29 1979-12-12 Rippes S.A. Brennerkopf für einen Gaslötbrenner

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0967435A1 (de) * 1998-06-26 1999-12-29 Truma Gerätetechnik GmbH & Co. Zündbrenner
CN101297159B (zh) * 2005-10-28 2011-02-09 Sefmat公司 内点燃式热空气燃烧器/发生器

Also Published As

Publication number Publication date
DE291372T1 (de) 1989-03-30
DE3885150D1 (de) 1993-12-02
FR2615271B1 (fr) 1990-03-16
FR2615271A1 (fr) 1988-11-18
JPS63286606A (ja) 1988-11-24
JPH0467089B2 (de) 1992-10-27
US4886446A (en) 1989-12-12
DE3885150T2 (de) 1994-03-17
EP0291372B1 (de) 1993-10-27

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