US3809525A - Flat-flame burner utilizing heavy liquid fuels - Google Patents

Flat-flame burner utilizing heavy liquid fuels Download PDF

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Publication number
US3809525A
US3809525A US00333796A US33379673A US3809525A US 3809525 A US3809525 A US 3809525A US 00333796 A US00333796 A US 00333796A US 33379673 A US33379673 A US 33379673A US 3809525 A US3809525 A US 3809525A
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US
United States
Prior art keywords
burner
injector
fuel
disc
flat
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
US00333796A
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English (en)
Inventor
R Wang
J Pariel
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.)
HEURTEY AND ELF UNION FR SA
HEURTEY AND ELF UNION SA
Original Assignee
HEURTEY AND ELF UNION SA
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 HEURTEY AND ELF UNION SA filed Critical HEURTEY AND ELF UNION SA
Application granted granted Critical
Publication of US3809525A publication Critical patent/US3809525A/en
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
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/10—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour

Definitions

  • the invention relates to a flat-flame burner in which the special geometrical configuration of the burner I components for introducing the fuel and the combustion air ensure proper mixing thereof and the required geometrical shape of the flames over a wide range of operating conditions.
  • the present invention relates to a flat-flame burner utilizing liquid fuels and has more particularly for its flame to the furnace wall by convection is restored by this wall by radiation and is transmitted to the items to be annealed in the furnace.
  • Prior art wall flame" burners can operate only on gas or domestic fuel, and it would obviously be most useful for users to have burners capable likewise of operating on fuel-oil and especially heavy fuel-oil.
  • the position of the injector must be so chosen as to ensure absolute cleanness of the burner tunnel in operation.
  • a flat-flame burner for heavy liquid fuels, comprising a cylindrical body coaxially surrounding a fuel and primary air feeding stick terminating in an injector, a divergent tunnel downstream of the injector, said body being further provided with a secondary air inlet opening in the annular cornpartment bounded by said bodyand said stick, and further means being provided for rotating said secondary air before releasing it through an annular slit surrounding the burner tip, is characterized in that said injector includes a needle-valve along which the liquid fuel flows and at the end of which it turns into droplets, said needle-valve being surrounded by a diffuser having helicoid primary air inlet passages for atomizing said droplets, the air/fuel suspension being thereafter directed towards an orifice which is formed in a disc and which is shaped as a convergent nozzle terminating in a rounded edge which joins the convergent portion of the nozzle to that face which lies in a plane perpendicular to the burner axis or very slightly inclined relative to said
  • FIG. 1 is a longitudinal sectional view of a flat-flame burner
  • FIG. 2 is a longitudinal sectional view of the injector built into the burner of FIG. 1.
  • a flat-flame burner which includes a burner body 1. Inside this body, coaxially therewith, is a fuel input stick 2 which is formed with primary air channelling means (not shown in FIG. 1). Stick 2 terminates in an injector 3 which will be described in greater detail hereinafter.
  • the body 1 is formed with a secondary air opening 4 provided with a diaphragm 5 for swirling the secondary air. This secondary air is discharged through an annular slit 6 surrounding the burner tip.
  • the compound consisting of the burner body, the fuel stick, the injector and the secondary air distributor is fixed to a gun 7 which extends said compound and is itself fixed to-the burner unit 8 which is formed with a divergent tunnel 9 therein.
  • the injector will now be described in detail with ref erence to FlG. 2.
  • Screwed into the end of fuel stick 2 is a burner tip 10 onto which is screwed .
  • a tip nut 11 into the front face of nut 11 is set a disc 12 made of a material having refractory properties (e.g. steel or ceramics) and having moderate heat conducting properties whereby to obtain a high temperature on the flame side.
  • the fuel stick includes a central fuel-feed duct 13 which is surrounded by a primary air-feed duct 14.
  • ribs 15 at the end of duct 13, positioned coaxially with the latter, is a needle-valve 16.
  • the walls of duct 13 surrounding said needle-valve form a diffuser having helicoid passages 17 formed therethrough.
  • the disc 12 has a central hole therein to form a convergent 18 terminating in a flared portion which blends the convergent portion with the front face of the disc.
  • This face is shown as being flat and perpendicular to the burner axis in FIG. 2 but could alternatively by formed by a concave or convex cone having a very large apex angle.
  • the hole 18 could be made very short and consist merely of a profiled hole with flared upstream and downstream portions.
  • the liquid fuel flowing along needle-valve 16 forms droplets at the end thereof and these droplets are atomized by the jet of primary air swirling about the needlevalve and delivered through helicoid passages 17.
  • the air/fuel suspension formed thus is thereafter directed towards convergent l8, and upon issuing therefrom is mixed with the eddying secondary air escaping through slit 6.
  • the position of the injector in the burner tunnel is so chosen that the external envelope of the jet of atomized liquid fuel lies close to the tangent to the divergent and flared portion 9 of the tunnel, the jet forming an aperture angle of close upon 40.
  • a flat-flame burner for heavy liquid fuels comprising a cylindrical body coaxially surrounding a primary air and fuel feeding stick terminating in an injector, a divergent tunnel downstream of the injector, said body being furthermore provided with a secondary air feeding opening in the annular compartment bounded by said body and said stick, and means being further provided for rotating said secondary air before it is re-' tion which blends the convergent nozzle portion with the disc face, which face lies ina plane perpendicular to the burner axis or very slightly inclined thereto.
  • a burner according to claim 1 characterized in that said orifice in said disc forming the burner tip is a very short profiled hole which is flared at either end.
  • a burner according to either preceding claim characterized in that said disc is made of a refractory material which is a poor heat conductor.
  • a burner according to claim 1 characterized in that said injector is disposed in the burner tunnel so that the external envelope of the jet of atomized liquid fuel lies close to the tangent to the divergent and flared portion of the tunnel, the jet forming an aperture angle of close on 40.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Nozzles For Spraying Of Liquid Fuel (AREA)
  • Combustion Of Fluid Fuel (AREA)
  • Pressure-Spray And Ultrasonic-Wave- Spray Burners (AREA)
US00333796A 1972-02-23 1973-02-20 Flat-flame burner utilizing heavy liquid fuels Expired - Lifetime US3809525A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7206075A FR2173410A5 (US07902200-20110308-C00004.png) 1972-02-23 1972-02-23

Publications (1)

Publication Number Publication Date
US3809525A true US3809525A (en) 1974-05-07

Family

ID=9093976

Family Applications (1)

Application Number Title Priority Date Filing Date
US00333796A Expired - Lifetime US3809525A (en) 1972-02-23 1973-02-20 Flat-flame burner utilizing heavy liquid fuels

Country Status (10)

Country Link
US (1) US3809525A (US07902200-20110308-C00004.png)
JP (1) JPS5517883B2 (US07902200-20110308-C00004.png)
BE (1) BE795438A (US07902200-20110308-C00004.png)
DE (1) DE2308470C3 (US07902200-20110308-C00004.png)
ES (1) ES411908A1 (US07902200-20110308-C00004.png)
FR (1) FR2173410A5 (US07902200-20110308-C00004.png)
GB (1) GB1425367A (US07902200-20110308-C00004.png)
IT (1) IT979339B (US07902200-20110308-C00004.png)
LU (1) LU67030A1 (US07902200-20110308-C00004.png)
NL (1) NL150218B (US07902200-20110308-C00004.png)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4004789A (en) * 1975-02-05 1977-01-25 Bethlehem Steel Corporation Tunnelized burner for panel type furnace
DE2830228A1 (de) * 1978-07-10 1980-01-24 Cons Natural Gas Svc Brenner fuer gasfoermige und fluessige brennstoffe
US4690635A (en) * 1986-07-21 1987-09-01 Maxon Corporation High temperature burner assembly
US4986748A (en) * 1989-12-15 1991-01-22 Corning Incorporated Wide range oxy-fuel burner and furnace operation
US5092760A (en) * 1990-08-01 1992-03-03 Maxon Corporation Oxygen-fuel burner assembly and operation
US5405082A (en) * 1993-07-06 1995-04-11 Corning Incorporated Oxy/fuel burner with low volume fuel stream projection
US6077072A (en) * 1998-09-18 2000-06-20 American Air Liquide Inc. Prefferential oxygen firing system for counter-current mineral calcining
US6123542A (en) * 1998-11-03 2000-09-26 American Air Liquide Self-cooled oxygen-fuel burner for use in high-temperature and high-particulate furnaces
US6461145B1 (en) * 1999-02-25 2002-10-08 Stein Heurtey Flat flame burners
US20090181333A1 (en) * 2008-01-11 2009-07-16 Feese James J Three Stage Low NOx Burner System With Controlled Stage Air Separation

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3826446A1 (de) * 1988-08-04 1990-02-08 R & D Carbon Ltd Zerstaeuberbrenner fuer fluessige brennstoffe
DE102008063101A1 (de) 2008-12-24 2010-07-01 Messer Austria Gmbh Flachflammenbrenner und Verfahren zum Betreiben eines Flachflammenbrenners
WO2017173537A1 (en) * 2016-04-05 2017-10-12 Métal 7 Inc. Burner for gas heated furnace and method of operation thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3748087A (en) * 1971-10-14 1973-07-24 Pyronics Inc Burner apparatus and method for flame propagation control

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT30801B (de) * 1905-11-06 1907-11-25 Carl Leistner Brenner für flüssige Brennstoffe.
CH42291A (de) * 1907-12-04 1909-01-16 August Koch Verfahren und Vorrichtung zur Vergasung flüssiger Brennstoffe, insbesondere von Schwerölen
DE1108840B (de) * 1955-07-19 1961-06-15 Iaofuiaofenbau Union G M B H Brenner zur Erzeugung einer divergierenden Flamme

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3748087A (en) * 1971-10-14 1973-07-24 Pyronics Inc Burner apparatus and method for flame propagation control

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4004789A (en) * 1975-02-05 1977-01-25 Bethlehem Steel Corporation Tunnelized burner for panel type furnace
DE2830228A1 (de) * 1978-07-10 1980-01-24 Cons Natural Gas Svc Brenner fuer gasfoermige und fluessige brennstoffe
US4690635A (en) * 1986-07-21 1987-09-01 Maxon Corporation High temperature burner assembly
US4986748A (en) * 1989-12-15 1991-01-22 Corning Incorporated Wide range oxy-fuel burner and furnace operation
US5092760A (en) * 1990-08-01 1992-03-03 Maxon Corporation Oxygen-fuel burner assembly and operation
EP0473906A1 (en) * 1990-08-01 1992-03-11 Corning Incorporated Oxygen-fuel burner assembly and operation
US5405082A (en) * 1993-07-06 1995-04-11 Corning Incorporated Oxy/fuel burner with low volume fuel stream projection
US6077072A (en) * 1998-09-18 2000-06-20 American Air Liquide Inc. Prefferential oxygen firing system for counter-current mineral calcining
US6123542A (en) * 1998-11-03 2000-09-26 American Air Liquide Self-cooled oxygen-fuel burner for use in high-temperature and high-particulate furnaces
US6210151B1 (en) * 1998-11-03 2001-04-03 American Air Liquide Self-cooled oxygen-fuel burner for use in high-temperature and high-particulate furnaces
US6461145B1 (en) * 1999-02-25 2002-10-08 Stein Heurtey Flat flame burners
US20090181333A1 (en) * 2008-01-11 2009-07-16 Feese James J Three Stage Low NOx Burner System With Controlled Stage Air Separation
US8485813B2 (en) * 2008-01-11 2013-07-16 Hauck Manufacturing Company Three stage low NOx burner system with controlled stage air separation

Also Published As

Publication number Publication date
JPS5517883B2 (US07902200-20110308-C00004.png) 1980-05-15
NL7302481A (US07902200-20110308-C00004.png) 1973-08-27
DE2308470A1 (de) 1973-08-30
DE2308470C3 (de) 1981-08-06
FR2173410A5 (US07902200-20110308-C00004.png) 1973-10-05
GB1425367A (en) 1976-02-18
LU67030A1 (US07902200-20110308-C00004.png) 1973-04-19
NL150218B (nl) 1976-07-15
ES411908A1 (es) 1976-01-01
DE2308470B2 (de) 1980-10-23
BE795438A (fr) 1973-05-29
IT979339B (it) 1974-09-30
JPS4894925A (US07902200-20110308-C00004.png) 1973-12-06

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