US3514245A - Burner assembly for fluid fuels - Google Patents

Burner assembly for fluid fuels Download PDF

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Publication number
US3514245A
US3514245A US720205A US3514245DA US3514245A US 3514245 A US3514245 A US 3514245A US 720205 A US720205 A US 720205A US 3514245D A US3514245D A US 3514245DA US 3514245 A US3514245 A US 3514245A
Authority
US
United States
Prior art keywords
shroud
air
fuel
passages
nozzle
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
US720205A
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English (en)
Inventor
Dennis Ronald Adcock
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.)
Airoil Burner Co Ltd
Airoil Flaregas Ltd
Original Assignee
Airoil Burner Co Ltd
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 Airoil Burner Co Ltd filed Critical Airoil Burner Co Ltd
Application granted granted Critical
Publication of US3514245A publication Critical patent/US3514245A/en
Assigned to AIROIL FLAREGAS LIMITED reassignment AIROIL FLAREGAS LIMITED ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: AIROIL BURNER COMPNY (G.B.) LIMITED
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
    • F23D17/00—Burners for combustion conjointly or alternatively of gaseous or liquid or pulverulent fuel
    • F23D17/002—Burners for combustion conjointly or alternatively of gaseous or liquid or pulverulent fuel gaseous or liquid fuel
    • 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
    • F23D14/12—Radiant burners
    • F23D14/125—Radiant burners heating a wall surface to incandescence

Definitions

  • the burner assembly has a curved funnel-shaped shroud into which fuel and air is emitted for combustion.
  • the shroud has circumferential air passages in its enlarged portion disposed so that the air passed into the shroud is mixed with the fuel and swirled and further air passages in its narrowest portion which emit an air stream which flows over a fuel emitting nozzle so as to clean this part and prevent the formation of carbon deposits.
  • both liquid and gaseous fuel gas supply passages extend through the narrowest portion of the shroud and also disposed so that when fuel gas is emitted it also swirls and mixes with the liquid fuel/air mixture.
  • Burner assemblies have been known which are adapted to be fitted into the wall of a furnace so as to heat the surface of the wall portion around the burner assembly and thus produce a heated surface which radiates heat to the interior of the furnace.
  • Such assemblies usually burn liquid fuel. With these assemblies it is desirable to produce agitation or whirling movement of the air injected into the combustion chamber in order that the liquid fuel and air should become more thoroughly mixed. It has been found that the construction of such assemblies is generally complicated and very often the assembly does not work at maximum efiiciency.
  • An object of the present invention is to provide a burner assembly which is adapted to burn liquid fuel, or gaseous fuel or a combination of liquid fuel and gaseous fuel.
  • a further object of the invention is to provide a burner assembly which is simple to construct and will operate with maximum efiiciency and is designed to facilitate easy location in the wall of a furnace.
  • a burner assembly comprising:
  • Air supply means communicating with the shroud through the housing
  • a burner assembly comprising:
  • Air supply means communicating with the shroud through the housing
  • a refractory block having an outwardly flared aperture disposed co-axially with the shroud, whereby the surface of the aperture extends from the enlarged portion of the shroud so as to act as a radiant heat source, and
  • the fuel supply means can be a liquid fuel injector connected to the burner nozzle by means of a liquid fuel supply tube.
  • the fuel supply means can be a gaseous fuel injector connected to the burner nozzle by means of a gaseous fuel supply tube.
  • both liquid fuel supply means and gaseous fuel supply means are provided.
  • the liquid fuel is ejected by the burner nozzle and gaseous fuel is conveyed to supply passages provided in the shroud.
  • These gas supply passages are directed forwardly and obliquely to the axis of the shroud so that the gas is also swirled and mixed with the liquid fuel/air in the space defined by the enlarged portion of the shroud.
  • FIG. 1 is a section through a burner assembly made in accordance with the invention for the combustion of both liquid and gaseous fuel
  • FIG. 2 is an enlarged section through the funnelshaped shroud
  • FIG. 3 is an end view of the shroud together with a partial view of a section through one of the fuel gas passages.
  • the burner assembly is fitted to the wall 1 of a furnace by removing a section of the wall and replacing it with a refractory block 2 having an aperture 3.
  • a refractory block 2 having an aperture 3.
  • the aperture 3 is flared outwardly towards the interior of the furnace and the narrow outer end of the aperture 3 is shaped to receive the burner assembly.
  • the burner assembly comprises a main housing 4 having a flange portion 5 which is bolted to the wall 1.
  • the housing 4 includes an air inlet conduit 6 which is provided with an adjustable damper 7 to control the flow of air into the assembly.
  • the burner head itself comprises a shroud 8 which is smoothly curved and generally funnel-shaped.
  • the shroud 8 is fixed to the end of a support tube 9, e.g. by welding, extending into the housing 4.
  • the support tube 9 projects inwardly into the housing 4 and the location of the shroud 8 within the aperture 3 can be adjusted, preferably during installation, by varying the amount by which the support tube 9 projects into the housing 4.
  • the shroud 8 has its narrowest end, remote from the inside of the furnace, attached to a tube 10 which is connected at its other end to a gas inlet manifold 11.
  • the tube 10 is provided with an external baffle 12 which operates in conjunction with a baffle 13 provided on the inner surface of the housing 4 so that air fed into the assembly is reduced in velocity and any air pressure differences are equilised.
  • a further tube 14 is mounted concentrically within the tube 10 and extends between the shroud 8 and a liquid fuel injector or gun 15 to form an annular passage 16 for the flow of fuel gas to the shroud 8.
  • the liquid fuel supply tube 17 extends between the liquid fuel injector 15 and the shroud 8 and is mounted within the tube 14 and supported therein by means of spacers 18.
  • a burner nozzle 28 is fitted to the end of the tube 17 and is disposed within the narrowest portion of the shroud 8.
  • the shroud 8 is provided with two series of circumferential air passages 20 and 21 located in the wall of its enlarged widest portion. These passages 20, 21 are directed forwardly and obliquely to the axis of the shroud 8.
  • the axes of the holes 20, 21 are inclined at an angle of to the axis of the shroud in one plane and at to the axis of the shroud in the plane at right angles to said one plane.
  • these angles are not unduly critical and can be altered to suit a particular combustion parameter.
  • the wall of the narrowest portion of the shroud 8 is also formed with a series of air passages 22 and these are simply disposed radially towards the axis of the shroud 8.
  • passages 22 can be inclined forwardly and obliquely to the axis of the shroud but there appears no great advantage in this construction.
  • the passages 22 pass through webs 24 (FIG. 3) which extend between an outer wall 25 and an inner wall 26 in the narrowest portion of the shroud 8. Further passages 27 are provided between these webs 24 for the supply of fuel gas into the space defined by the enlarged portion of the shroud 8.
  • These passages 27 extend parallel to the axis of the shroud 8 in one plane and obliquely to the axis of the shroud in the plane at right angles to said one plane. In the arrangement illustrated they are inclined at an angle of 20 to the axis in one of the planes.
  • the operation of the burner assembly is as follows. Liquid fuel is fed to the injector 15 and passes along the tube 17 to the burner nozzle 28 where it is injected into the space defined by the enlarged portion of the shroud 8 in a flared atomized spray. Fuel gas is fed from the manifold 11 along the annular passage 16 to the shroud 8 were it passes into the space defined by the enlarged portion of the shroud through the passages 27 which are arranged to swirl the fuel gas and mix it with the liquid fuel delivered by the nozzle 28. Air is fed into the housing 4 from the conduit 6 from whence it passes around the baffies 12 and 13 and into the space between the tube 9 and the outer surface of the shroud 8.
  • a small portion of the air passes into the narrowest portion of the shroud 8 via the passages 22 and this serves to keep the burner nozzle free from liquid fuel and prevents the formation of deposits of carbon.
  • the majority of air passes through the passages 20 and 21 in the enlarged portion of the shroud and because of the angle at which the passages 20 and 21 face the space defined by the enlarged portion of the shroud 8 air passing through these passages is swirled to efficiently mix with the liquid and gaseous fuel.
  • a gas pilot extending through the block 2 the fuel/air mixture burns in a cone extending from the nozzle 28 in the direction of the widest flared portion of the aperture 3.
  • the outwardly flared surfaces of the block 2 are heated and consequently act as a radiator which radiates heat to the furnace.
  • the assembly is to consume liquid fuel only
  • the tube 14 and gas inlet manifold 11 can be dispensed with.
  • the liquid fuel supply tube 17 can then be located within the tube 10 and if desired the gas supply passages 27 in the shroud 8 can be omitted.
  • the assembly is to consume gaseous fuel only
  • the liquid fuel injector 15 is replaced with a gaseous fuel injector so that the supply tube 17 becomes a gaseous fuel supply tube and the burner nozzle 28 emits gaseous fuel.
  • the tube 14 and gas inlet manifold 11 can be dispensed with and the gas supply passages 27 in the shroud 8 omitted.
  • a burner assembly comprising:
  • a shroud carried by and extending within the sup port tube, the shroud having a cup-shaped outlet portion adjoining an inlet portion, the outlet portion being disposed outwardly relative to said housing and being smoothly curved and enlarged relative to said inlet portion;
  • a burner nozzle disposed within said inlet portion of the shroud and arranged at the axis thereof, said nozzle being adapted to emit combustion fuel in a divergent pattern emanating from the axis of the shroud at said inlet portion and into the space defined by the outlet portion of the shroud for combustion therein;
  • gas supply passages extending generally longitudinally through the wall of the inlet portion of the shroud, the gas supply passages having axes extending parallel to the longitudinal axis of the shroud in one plane and obliquely relative to the axis of the shroud in a plane perpendicularly to said one plane so as to emit fuel gas supplied thereto into the space defined by the outlet portion of the shroud in a swirling pattern;
  • adjustable air supply means communicating via the housing with said air passages in the inlet and outlet portions of the shroud.
  • the air supply means is composed of an air inlet conduit which has a damper to control the flow of air into the assembly and wherein baflles are provided in the housing for reducing the velocity of air fed to said air passage.
  • each passage of said series of air passages located in the outlet portion of the shroud has an axis extending at an angle of 45 to the axis of the shroud in one plane and at an angle of 50 to the axis of the shroud in the plane at right angles to said one plane and each passage of said further air passages located in the inlet portion of the shroud extends radially of the axis of the shroud.
  • each of the gas supply passages has an axis which extends parallel to the axis of the shroud in one plane and at an angle of 20 to the axis of the shroud in the plane at right angles to said one plane.
  • a shroud carried by and extending within the support tube, the shroud having a cup-shaped outlet portion adjoining an inlet portion, the outlet portion being disposed outwardly relative to said housing and being smoothly curved and enlarged relative to said inlet portion;
  • a burner nozzle disposed within said inlet portion of the shroud and arranged at the axis thereof, said nozzle being adapted to emit combustion fuel in a divergent pattern emanating from the axis of the shroud at said inlet portion and into the space defined by the outlet portion of the shroud for combustion therein;
  • gas supply passages extending generally longitudinally through the wall of the inlet portion of the shroud, the gas supply passages having axes extending parallel to the longitudinal axis of the shroud in one plane and obliquely relative to the axis of the shroud in a plane perpendicularly to said one plane so as to emit fuel gas supplied thereto into the space defined by the outlet portion of the shroud in a swirling pattern;
  • adjustable air supply means communicating via the housing with said air passages in the inlet and outlet portions of the shroud;

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Spray-Type Burners (AREA)
  • Pre-Mixing And Non-Premixing Gas Burner (AREA)
US720205A 1967-04-11 1968-04-10 Burner assembly for fluid fuels Expired - Lifetime US3514245A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1664567 1967-04-11

Publications (1)

Publication Number Publication Date
US3514245A true US3514245A (en) 1970-05-26

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ID=10081053

Family Applications (1)

Application Number Title Priority Date Filing Date
US720205A Expired - Lifetime US3514245A (en) 1967-04-11 1968-04-10 Burner assembly for fluid fuels

Country Status (4)

Country Link
US (1) US3514245A (xx)
DE (1) DE1751154A1 (xx)
FR (1) FR1560108A (xx)
GB (1) GB1227343A (xx)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3940234A (en) * 1974-05-28 1976-02-24 John Zink Company Noiseless pms burner
US20110185986A1 (en) * 2009-12-01 2011-08-04 International Thermal Investments Ltd. Propane or diesel powered heater with common burner opening
WO2015018962A3 (es) * 2013-08-07 2015-04-09 Abengoa Hidrogeno, S. A. Quemador para un sistema de reformado de hidrocarburos y alcoholes, sistema de reformado de hidrocarburos y alcoholes que lo comprende y procedimiento asociado
US20160076763A1 (en) * 2013-04-19 2016-03-17 Loesche Gmbh Central burner for multi-fuel multiple lance burner system
US20180209639A1 (en) * 2017-01-20 2018-07-26 Marc Mahé Gas heater conversion system and method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2316161A (en) * 1996-08-05 1998-02-18 Boc Group Plc Oxygen-fuel swirl burner

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1290607A (en) * 1917-05-10 1919-01-07 Schutte & Koerting Company Air-register for oil-burners.
US1451063A (en) * 1923-04-10 Burner
US1731722A (en) * 1927-07-11 1929-10-15 Balcke Ag Maschbau Gas burner
US1781236A (en) * 1928-04-23 1930-11-11 Lilge Friedrich Whirl burner
US1910735A (en) * 1927-02-14 1933-05-23 Buttnerwerke A G Burner for coal dust firing
US2325318A (en) * 1941-03-10 1943-07-27 Houston W Hendrix Pulverized coal burner
US3050112A (en) * 1960-09-02 1962-08-21 Eclipse Fuel Eng Co Radiant gas burner
US3115924A (en) * 1960-02-03 1963-12-31 Selas Corp Of America Burner
US3164200A (en) * 1962-06-27 1965-01-05 Zink Co John Multiple fuel burner

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1451063A (en) * 1923-04-10 Burner
US1290607A (en) * 1917-05-10 1919-01-07 Schutte & Koerting Company Air-register for oil-burners.
US1910735A (en) * 1927-02-14 1933-05-23 Buttnerwerke A G Burner for coal dust firing
US1731722A (en) * 1927-07-11 1929-10-15 Balcke Ag Maschbau Gas burner
US1781236A (en) * 1928-04-23 1930-11-11 Lilge Friedrich Whirl burner
US2325318A (en) * 1941-03-10 1943-07-27 Houston W Hendrix Pulverized coal burner
US3115924A (en) * 1960-02-03 1963-12-31 Selas Corp Of America Burner
US3050112A (en) * 1960-09-02 1962-08-21 Eclipse Fuel Eng Co Radiant gas burner
US3164200A (en) * 1962-06-27 1965-01-05 Zink Co John Multiple fuel burner

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3940234A (en) * 1974-05-28 1976-02-24 John Zink Company Noiseless pms burner
US20110185986A1 (en) * 2009-12-01 2011-08-04 International Thermal Investments Ltd. Propane or diesel powered heater with common burner opening
US20160076763A1 (en) * 2013-04-19 2016-03-17 Loesche Gmbh Central burner for multi-fuel multiple lance burner system
US10088155B2 (en) * 2013-04-19 2018-10-02 Loesche Gmbh Central burner for multi-fuel multiple lance burner system
WO2015018962A3 (es) * 2013-08-07 2015-04-09 Abengoa Hidrogeno, S. A. Quemador para un sistema de reformado de hidrocarburos y alcoholes, sistema de reformado de hidrocarburos y alcoholes que lo comprende y procedimiento asociado
US20180209639A1 (en) * 2017-01-20 2018-07-26 Marc Mahé Gas heater conversion system and method

Also Published As

Publication number Publication date
FR1560108A (xx) 1969-03-14
DE1751154A1 (de) 1971-06-03
GB1227343A (xx) 1971-04-07

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Legal Events

Date Code Title Description
AS Assignment

Owner name: AIROIL FLAREGAS LIMITED, VALE ROAD, TONBRIDGE, KEN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:AIROIL BURNER COMPNY (G.B.) LIMITED;REEL/FRAME:003862/0714

Effective date: 19801013