EP0292555A1 - Brenner mit zwei brennstoffstrahlen und verfahren zu seinem betrieb - Google Patents

Brenner mit zwei brennstoffstrahlen und verfahren zu seinem betrieb

Info

Publication number
EP0292555A1
EP0292555A1 EP88900376A EP88900376A EP0292555A1 EP 0292555 A1 EP0292555 A1 EP 0292555A1 EP 88900376 A EP88900376 A EP 88900376A EP 88900376 A EP88900376 A EP 88900376A EP 0292555 A1 EP0292555 A1 EP 0292555A1
Authority
EP
European Patent Office
Prior art keywords
burner
gas
orifices
barrel
primary
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.)
Ceased
Application number
EP88900376A
Other languages
English (en)
French (fr)
Inventor
Edmond Perthuis
François Audibert
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.)
IFP Energies Nouvelles IFPEN
Original Assignee
IFP Energies Nouvelles IFPEN
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 IFP Energies Nouvelles IFPEN filed Critical IFP Energies Nouvelles IFPEN
Publication of EP0292555A1 publication Critical patent/EP0292555A1/de
Ceased legal-status Critical Current

Links

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
    • F23D14/20—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
    • F23D14/22—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
    • F23D14/24—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other at least one of the fluids being submitted to a swirling motion
    • 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 
    • F23C6/00—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion
    • F23C6/04—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection
    • F23C6/045—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection with staged combustion in a single enclosure
    • F23C6/047—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection with staged combustion in a single enclosure with fuel supply in stages
    • 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 
    • F23C2201/00—Staged combustion
    • F23C2201/20—Burner staging

Definitions

  • the present invention relates to a gas burner for fireplaces, in particular for industrial or domestic fireplaces.
  • the present invention is particularly well suited to the combustion of gases. However, it will not depart from the scope of the present invention using a liquid fuel, possibly pneumatically sprayed.
  • the burner according to the present invention has better performance compared to the burners of the prior art, in particular as regards the content of nitrogen oxides in the gaseous effluents.
  • the fuel introduction device comprises first means for injecting the combustible fluid such as a gas adapted to produce a first substantially axial or slightly divergent jet relative to the axis of the burner and second means for injecting the fluid such a gas adapted to produce a second diverging jet relative to the axis of the burner.
  • the hearth burner according to the present invention comprises a gun for introducing a primary oxidizer, or primary gun, a gun for introducing a secondary oxidizer, or secondary gun, a device for introducing a fluid fuel in particular gas and a deflector-stabilizer located substantially at the end of the barrel primary facing the fireplace.
  • the fuel introduction device can be housed inside the primary barrel which itself can be located inside the secondary barrel.
  • These three bodies can be cylindrical and coaxial.
  • the fuel introduction device may include an injector itself comprising a first series of orifices forming said first means for injecting the fluid and a second series of orifices forming said second means for injecting the fluid.
  • the axis of injection of each of the orifices of the first series may form with the direction defined by the axis of the burner an angle alpha less than 15
  • each of the orifices of the second series may form with the direction defined by said axis of the burner a beta angle of between 40 ° and 60 °.
  • the angle alpha of each of the orifices of the first series may be between 10 and 15 and preferably equal to 12.5.
  • the beta angle of each of the orifices of the second series may be substantially close to 50
  • the axes of the orifices of the first series may be substantially inscribed on the surface of a cone or a cylinder.
  • the first jet will have substantially the shape of a frustoconical sheet.
  • the axes of the orifices of the second series may also be substantially inscribed on the surface of a cone.
  • the second jet will also have substantially the shape of a frustoconical sheet.
  • the secondary barrel can include a convergent intended to direct the secondary oxidant towards the primary oxidant.
  • the fuel introduction device may include a rod at the end of which the first and second gas injection means may be fixed.
  • the present invention also relates to a method for burning oxidant gas, such as oxygen, with fuel gas, such as natural gas.
  • oxidant gas such as oxygen
  • fuel gas such as natural gas.
  • the oxidizing gas is introduced into a hearth by at least two veins, one being central and the other surrounding this central vein.
  • two jets of fuel gas are produced, one of the jets supplying the central vein with oxidizing gas and the other jet supplying the other vein with oxidizing gas.
  • the axial or slightly divergent jet and the divergent jet do not interfere with each other at the outlet of the injector and retain their individuality at this level. This can be obtained in particular if the diverging jet envelopes the slightly diverging axial jet.
  • FIG. 1 represents a schematic view of a gas burner
  • the device described below is suitable for the use of a gaseous fuel, such as natural gas.
  • a gaseous fuel such as natural gas.
  • the reference 1 designates a gas introduction rod which makes it possible to supply the gas injector 2.
  • the burner comprises at least one air introduction pipe or primary oxidizer, or primary barrel, and one air introduction pipe or secondary oxidizer, or secondary barrel.
  • Reference 4 designates the primary gun
  • Reference 5 designates the secondary gun.
  • the primary barrel is housed in the secondary barrel. These guns are substantially cylindrical and coaxial.
  • the gas injection pipe 1 is located inside the primary barrel.
  • Arrows 6 designate the primary air stream and arrows 7 designate the secondary air stream.
  • References 8 and 9 respectively designate the primary and secondary air inlets. These air inlets may have a shape different from that shown in FIG. 1, in particular to minimize the pressure drops. Of course, these inlets can be connected to the same air source or to two different sources, possibly via ent making it possible to control the distribution of air between the two inlets. These bodies may consist, for example, of one or more components.
  • the distribution can be such that the primary area can represent 35 to 70% of the total air, the optimal settings in terms of combustion being nevertheless between 40 and 60%.
  • the ignition of the burner shown in Figure 1 is effected by a torch 10 comprising ignition means such as a candle connected to a high voltage source via a cable 16.
  • the torch 10 is supplied with fuel by a pipe 17. This fuel can be of the same nature as the gas supplying the burner.
  • the burner head illustrated in FIG. 1 comprises a deflector-stabilizer 14 designated simply by the term of deflector in the remainder of this text.
  • This deflector comprises a grid of blades 15 whose angle of inclination on the axis is preferably of the order of 45.
  • the fins 15, for example eighteen in number, can be flat, or preferably have a semi-curvilinear profile which makes it possible to lower the coefficient of intrinsic pressure drop, and therefore the driving pressure of the air at strong heat flows.
  • This deflector 14 can be arranged coaxially with the fuel introduction rod 1, so that an air passage 18 for sweeping or not is arranged in line with the gas introduction head 2.
  • the burner head may include a frustoconical convergent 20 intended to direct the secondary air flow 7 properly.
  • the large base of the frustoconical convergent 20 is substantially located on the plane perpendicular to the axis 19 of the burner passing through the end of the primary barrel.
  • the front ends 21 of the blade heads aooartart substantially in this same plane.
  • the gas injector according to the present invention makes it possible to obtain very slightly divergent or axial gas jets 22 preferentially supplying the central stabilization vortex 23 and highly divergent external gas jets 24 supplying the secondary air stream of a preferential way.
  • the central stabilization vortex is created by the deflector 14.
  • the axial or slightly divergent jet and the divergent jet keep their individuality one compared to the level of the injector.
  • the residence time of the gaseous fuel, conditioned by the angle alpha of the central jets 22, governs the richness of the primary combustion for a distribution between the primary air and the fixed secondary air, which corresponds to a Q / Q ratio. fixed.
  • the angle of the external jets 24 conditions the greater or lesser speed of encounter of the gaseous fuel with the secondary air stream 25 which can be substantially axial, and therefore more or less delay the birth of the secondary combustion.
  • axial secondary air stream it is meant that the air leaving the secondary barrel has little or no gyration movement around the axis of the burner 19.
  • the burner with two air streams equipped with a gas cane as described, constitutes an equipment performing the staging of the combustion, both by the distribution of air and that of the fuel. .
  • FIG. 2 shows in detail the gas injector 2.
  • This injector 2 has two rings of orifices 26 and 27.
  • the orifices of the first series of orifices 26 defined by those of the first crown have axes 27a which form an angle alpha (in Greek letter in FIG. 2) of between 0 and 15 relative to the direction of the axis 19 of the burner. Good results have been obtained for an alpha angle between 10 and 15 and in particular for an alpha angle equal to 12.5.
  • the axes 27a of the orifices 26 of the first ring are inscribed on a cone whose angle at the apex is equal to 2 alpha and is therefore between 0 and 30 °.
  • the orifices of the second series of orifices 27 defined by those of the second crown have axes 28 which form a beta angle (in Greek letter in FIG. 2) of between 40 and 60 relative to the axis 19 of the burner. Good results have been obtained for a beta angle equal to 50.
  • the axes 28 of the orifices 26 are written on a cone whose angle at the apex is equal to 2 beta and is therefore between 80 and 120.
  • the orifices 26 of the first ring are placed on a first frustoconical surface 29 of the burner head.
  • the orifices 27 of the second ring are placed on a second frustoconical surface 30 of the burner head.
  • the orifices 26, 27 may be respectively perpendicular to the frustoconical surfaces 19 and 30 °.
  • the first and second truncated cones 29 and 30 are connected according to the circle 31.
  • the axial or slightly divergent jet does not interfere with the divergent jet at vicinity of the injector. This is achieved, for example, by arranging the first ports inside the second ports.
  • FIG. 3 shows another embodiment of the injector 2. This has the form of a flattened cap 32 and carries a double crown 33, 34 of holes for introducing the first jet and a single crown 35 d 'orifices for introducing the second jet.
  • the number of orifices for introducing the first jet is substantially equal to the number of orifices for introducing the second jet.
  • the total number of orifices of the embodiment shown in FIG. 3 is substantially equal to 90 and the orifices are all of the same diameter.
  • the burner according to the invention is adapted so that the reaction zone Le of the burner nose or primary zone has an oxidant / fuel ratio lower than the same ratio relating to The secondary zone corresponding substantially to the zone or continues and ends the combustion.
  • Fuel richness is therefore greater in the primary zone than in the secondary zone.
  • this richness will be in the primary zone, greater than that corresponding to a stoichiometric reaction.
  • the primary zone will contain more fuel than necessary to consume the oxidant reaching this primary zone.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pre-Mixing And Non-Premixing Gas Burner (AREA)
EP88900376A 1986-12-12 1987-12-11 Brenner mit zwei brennstoffstrahlen und verfahren zu seinem betrieb Ceased EP0292555A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8617538A FR2608257B1 (fr) 1986-12-12 1986-12-12 Procede pour bruler du gaz et bruleur a gaz a jet axial et jet divergent
FR8617538 1986-12-12

Publications (1)

Publication Number Publication Date
EP0292555A1 true EP0292555A1 (de) 1988-11-30

Family

ID=9341918

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88900376A Ceased EP0292555A1 (de) 1986-12-12 1987-12-11 Brenner mit zwei brennstoffstrahlen und verfahren zu seinem betrieb

Country Status (5)

Country Link
US (1) US5147199A (de)
EP (1) EP0292555A1 (de)
JP (1) JPH01502212A (de)
FR (1) FR2608257B1 (de)
WO (1) WO1988004391A1 (de)

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DE3830038A1 (de) * 1988-09-03 1990-03-08 Gaswaerme Inst Ev Brenner und verfahren zu seinem betreiben
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US5547368A (en) * 1993-03-01 1996-08-20 Air Products And Chemicals, Inc. Process and device for combustion-enhanced atomization and vaporization of liquid fuels
US5470224A (en) * 1993-07-16 1995-11-28 Radian Corporation Apparatus and method for reducing NOx , CO and hydrocarbon emissions when burning gaseous fuels
US5407347A (en) * 1993-07-16 1995-04-18 Radian Corporation Apparatus and method for reducing NOx, CO and hydrocarbon emissions when burning gaseous fuels
US5542839A (en) * 1994-01-31 1996-08-06 Gas Research Institute Temperature controlled low emissions burner
US5709541A (en) * 1995-06-26 1998-01-20 Selas Corporation Of America Method and apparatus for reducing NOx emissions in a gas burner
IT1296212B1 (it) * 1997-02-24 1999-06-18 Novimpianti S R L Bruciatore in particolare per generatori di aria calda o simili
US6951454B2 (en) * 2003-05-21 2005-10-04 The Babcock & Wilcox Company Dual fuel burner for a shortened flame and reduced pollutant emissions
TWI381897B (zh) * 2004-12-22 2013-01-11 Taiyo Nippon Sanso Corp 金屬超微粉之製造方法
EP1941207B1 (de) * 2005-10-28 2011-07-06 Sefmat Heissluftbrenner/-erzeuger mit interner zündung
US7909601B2 (en) * 2006-01-24 2011-03-22 Exxonmobil Chemical Patents Inc. Dual fuel gas-liquid burner
US8075305B2 (en) * 2006-01-24 2011-12-13 Exxonmobil Chemical Patents Inc. Dual fuel gas-liquid burner
US7901204B2 (en) * 2006-01-24 2011-03-08 Exxonmobil Chemical Patents Inc. Dual fuel gas-liquid burner
JP4600850B2 (ja) * 2006-10-30 2010-12-22 バブ日立工業株式会社 ガスバーナ
US10658161B2 (en) * 2010-10-15 2020-05-19 Applied Materials, Inc. Method and apparatus for reducing particle defects in plasma etch chambers
CN105189373A (zh) * 2012-11-30 2015-12-23 康宁股份有限公司 涡旋燃烧器和浸没燃烧熔融的方法
CN104896473A (zh) * 2015-06-26 2015-09-09 洛阳明远石化技术有限公司 双燃料扁平火焰气体燃烧器
JP7248744B2 (ja) * 2021-06-28 2023-03-29 三菱重工パワーインダストリー株式会社 ガスバーナ、及びガス焚きボイラ

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Also Published As

Publication number Publication date
JPH01502212A (ja) 1989-08-03
US5147199A (en) 1992-09-15
FR2608257A1 (fr) 1988-06-17
FR2608257B1 (fr) 1989-05-19
WO1988004391A1 (fr) 1988-06-16

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