EP0675321A1 - Gasbrenner mit sehr niedrigen Stickstoffoxidemissionen - Google Patents

Gasbrenner mit sehr niedrigen Stickstoffoxidemissionen Download PDF

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Publication number
EP0675321A1
EP0675321A1 EP95400662A EP95400662A EP0675321A1 EP 0675321 A1 EP0675321 A1 EP 0675321A1 EP 95400662 A EP95400662 A EP 95400662A EP 95400662 A EP95400662 A EP 95400662A EP 0675321 A1 EP0675321 A1 EP 0675321A1
Authority
EP
European Patent Office
Prior art keywords
injection means
channel
hearth
primary
conduits
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
EP95400662A
Other languages
English (en)
French (fr)
Other versions
EP0675321B1 (de
Inventor
Frédéric Bury
Jean-Claude Gauthier
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.)
Entreprise Generale de Chauffage Industriel Pillard SA
Original Assignee
Entreprise Generale de Chauffage Industriel Pillard 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 Entreprise Generale de Chauffage Industriel Pillard SA filed Critical Entreprise Generale de Chauffage Industriel Pillard SA
Publication of EP0675321A1 publication Critical patent/EP0675321A1/de
Application granted granted Critical
Publication of EP0675321B1 publication Critical patent/EP0675321B1/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
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
    • F23C9/006—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber the recirculation taking place in the combustion chamber
    • 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
    • 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
    • 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 improvements in gaseous fuel burners with very low emission of nitrogen oxide comprising primary means of injecting combustible gas disposed at the center of the burner and peripheral secondary injection means, and intended for be mounted in an orifice provided for this in the wall of an enclosure, such as the combustion chamber or hearth of an oven or a boiler.
  • combustion in order to limit the maximum flame temperatures, combustion can be staggered, that is to say that instead of bringing all of the fuel and the oxidant into contact in a single zone, proceeds in stages: for this, either the injection of oxidant is staged without modifying the fuel injection, or on the contrary, the injection of fuel is staged without staging that of the oxidant.
  • All these known devices require a ring of bricks or refractory concrete arranged around the orifice proper of the burner; moreover, for some, the secondary injection nozzles are located at the periphery and for all, they are arranged in channels dug in said brick block; moreover, some of them are oriented to create a zone of turbulence and mixing inside the ring where the main flame is formed.
  • the method is such that the said secondary injection means are moved apart enough from each other so that each secondary flame is perfectly separated from the adjacent flames.
  • fuel is injected by tertiary injection means situated outside the air intake channel, around it, and possibly each associated with its own intake channel d air, and there are all the means for injecting primary, secondary and tertiary combustible gases, as well as the flame stabilizing means so that they do not create any vortex effect either in the combustion air or in gas injection.
  • the combustion zone is completely external to the burner proper, which ensures a much longer service life of the components thereof; this increase in service life is also linked to the fact that all of the secondary injection means are located inside the air supply channel, which allows them to cool.
  • the suction of the recirculation fumes produced in the hearth to reduce the presence of oxygen in the flames of these secondary supplies is ensured in a safe and simple manner.
  • No device for recycling said fumes is located in the hearth itself or in the combustion zone since they are all inside the burner, the body of which constitutes in fact the channel for supplying combustion air. .
  • the burner as shown in FIGS. 1 and 2 is a gaseous fuel burner comprising a tubular body the interior of which constitutes a channel for supplying combustion air 2 from any power source 22 external to the burner proper, a flame stabilizer 6 constituted by a conical disc provided with ribs and radial slots and disposed in the channel 2, towards its outlet orifice 13 through which said channel opens into the hearth 3, primary injection means 4 fuel in the hearth 3 arranged in the central part of the air intake channel 2, and secondary means 7 for injecting said fuel, distributed peripherally around said primary means 4.
  • the primary injection means consist of several rods arranged around the axis 12 of the channel 12 and the ends 21 of which are bent outwards and disposed under the slots of the flame stabilizer 6. These ends of the rods 4 are pierced holes through which combustible gas can be injected into the fireplace, through the slots in the flame stabilizer 6.
  • the secondary fuel injection means 7 consist of supply rods each terminating in a single nozzle 19 which each opens into a conduit 9 for recirculating the fumes produced in the hearth 3. According to the present invention, the assembly of these secondary injection means and of the associated recirculation conduits is situated inside the air supply channel 2.
  • the smoke recirculation conduits 9 open into the hearth 3 along axes 16 parallel to the main axis 12 of the supply channel 2 through orifices 18.
  • the other ends of the recirculation conduits fumes are placed in communication with the hearth 3 by orifices 14 drilled in the wall of the supply channel 2 and opening at the outer periphery of the burner.
  • the flame stabilizer 6 is carried by a tube 25 disposed in the axis of the channel 2 and in which is housed an ignition torch 26; a pilot burner or a liquid fuel injection pipe could be housed in the tube 25 in place of the torch 26.
  • edges of the outlet orifices 18 of said flue gas recirculation conduits 9 are situated in a plane perpendicular to the axis 12 of the burner, which also contains the edge of the outlet orifice 13 of channel 2, and slightly at the front flame stabilizer 6; the flames produced by the combustion of the gaseous mixture leaving these conduits are therefore outside the burner proper, beyond the flame stabilizer 6, thus creating a combustion zone external to the burner.
  • the nozzles 19 of the secondary injection means 7 are arranged inside the smoke recirculation conduits 19, at the level of the smoke suction orifices 14, to create a natural entrainment effect of said fumes through these orifices by the fuel gas ejection speed.
  • the smoke recirculation conduits 9 form protuberances inside the channel 2 and are effectively cooled by the air which circulates therein.
  • the secondary injection means 7-9 are separated enough from one another, depending on the diameter of the supply channel 2.
  • the burner according to the invention may also include means for injecting tertiary fuel constituted by rods 10 outside the air supply channel 2, distributed around the burner, and peripherally passing through the wall 1 of the enclosure of the hearth 3; each injection rod 10 is associated with its own channel 15 for supplying combustion air from possibly the same source of supply 22 of outside air, this channel surrounding the injection rod.
  • These said tertiary gaseous fuel injection canes are located along axes 17 each determining a radial plane with the axis 12 of the supply channel 2 and forming with this axis an angle between 0 to 40 ° in both directions, c that is to say in fact determine a cone of revolution around the axis of the burner 12.
  • the number of tertiary injection canes 10 can be equal to that of the secondary injection canes, as shown in FIG. 2, where this number is six; it could be higher because of their arrangement on a circle of larger diameter.
  • the end of the burner body protrudes from the wall 1 of the enclosure of the hearth 3.
  • the outlet 13 'of the air intake channel 2' is located in the plane of the wall 1 'of the enclosure of the hearth 3'.
  • This wall is hollowed out around the orifices 14 'of the conduits 9' to allow the suction of the fumes; this digging is in fact constituted by a circular groove 27 surrounding the end of the body of the burner.
  • the burner shown in FIG. 3 still differs from that of FIGS. 1 and 2 in that it comprises a single primary fuel injection nozzle 4 ′ placed in the axis of the channel 2 ′ and terminated by a nozzle pierced with several peripherally spaced orifices.
  • the rod 4 ' is housed in the tube 25' and the ignition torch 26 'is arranged eccentrically in the channel 2'.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
EP95400662A 1994-03-29 1995-03-24 Gasbrenner mit sehr niedrigen Stickstoffoxidemissionen Expired - Lifetime EP0675321B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9404136 1994-03-29
FR9404136A FR2718222B1 (fr) 1994-03-29 1994-03-29 Perfectionnements de brûleurs à combustible gazeux à très faible émission d'oxyde d'azote.

Publications (2)

Publication Number Publication Date
EP0675321A1 true EP0675321A1 (de) 1995-10-04
EP0675321B1 EP0675321B1 (de) 1999-05-26

Family

ID=9461869

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95400662A Expired - Lifetime EP0675321B1 (de) 1994-03-29 1995-03-24 Gasbrenner mit sehr niedrigen Stickstoffoxidemissionen

Country Status (6)

Country Link
US (1) US5634785A (de)
EP (1) EP0675321B1 (de)
CA (1) CA2145347A1 (de)
DE (1) DE69509816T2 (de)
ES (1) ES2132551T3 (de)
FR (1) FR2718222B1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0893651A1 (de) * 1997-07-22 1999-01-27 Entreprise Generale De Chauffage Industriel Pillard Brenner für flüssigen und gasförmigen Brennstoff mit niedriger Stickoxidemission
EP0978685A1 (de) * 1998-08-07 2000-02-09 Entreprise Generale De Chauffage Industriel Pillard Verbesserung an Brennern mit Abgasrückführung und niedrigem Stickoxydausstoss
EP1074790A1 (de) * 1999-08-04 2001-02-07 Entreprise Generale De Chauffage Industriel Pillard Brenner mit Abgasrückführung
FR2914398A1 (fr) * 2007-04-02 2008-10-03 Pillard Chauffage Bruleur a combustible gazeux

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19527083A1 (de) * 1995-07-25 1997-01-30 Lentjes Kraftwerkstechnik Verfahren und Brenner zur Verminderung der Bildung von NO¶x¶ bei der Verbrennung von Kohlenstaub
US5863193A (en) * 1997-04-03 1999-01-26 Atlantic Richfield Company Burner assembly
US5944503A (en) * 1998-05-20 1999-08-31 Selas Corporation Of America Low NOx floor burner, and heating method
US6062848A (en) * 1998-05-29 2000-05-16 Coen Company, Inc. Vibration-resistant low NOx burner
AU4694099A (en) 1998-06-17 2000-01-05 John Zink Company Llc Low no chi and low co burner and method for operating same
FR2788838B1 (fr) * 1999-01-22 2001-06-08 Pillard Chauffage Procede de chauffage utilisant un bruleur a combustible liquide
AU2001249639A1 (en) 2000-03-31 2001-10-15 Aqua-Chem Inc. Low pollution emission burner
US6616442B2 (en) * 2000-11-30 2003-09-09 John Zink Company, Llc Low NOx premix burner apparatus and methods
US6652265B2 (en) 2000-12-06 2003-11-25 North American Manufacturing Company Burner apparatus and method
US6773256B2 (en) * 2002-02-05 2004-08-10 Air Products And Chemicals, Inc. Ultra low NOx burner for process heating
US6929469B2 (en) * 2002-02-28 2005-08-16 North American Manufacturing Company Burner apparatus
US6866503B2 (en) * 2003-01-29 2005-03-15 Air Products And Chemicals, Inc. Slotted injection nozzle and low NOx burner assembly
US20070048679A1 (en) * 2003-01-29 2007-03-01 Joshi Mahendra L Fuel dilution for reducing NOx production
US20060275724A1 (en) * 2005-06-02 2006-12-07 Joshi Mahendra L Dynamic burner reconfiguration and combustion system for process heaters and boilers
KR100921720B1 (ko) * 2008-03-04 2009-10-15 한국에너지기술연구원 고효율 자기축열식버너
US8007681B2 (en) * 2008-04-25 2011-08-30 Shell Oil Company Methods, compositions, and burner systems for reducing emissions of carbon dioxide gas into the atmosphere
US10281140B2 (en) * 2014-07-15 2019-05-07 Chevron U.S.A. Inc. Low NOx combustion method and apparatus
CN107726316A (zh) * 2017-11-15 2018-02-23 北京泷涛环境科技有限公司 一种燃料强化分级超低氮气体燃烧器
CN109539251B (zh) * 2018-12-14 2024-07-09 罗诺克兹（北京）能源设备技术有限公司 一种超低氮燃烧器

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4395223A (en) * 1978-06-09 1983-07-26 Hitachi Shipbuilding & Engineering Co., Ltd. Multi-stage combustion method for inhibiting formation of nitrogen oxides
EP0348646A2 (de) * 1988-06-30 1990-01-03 Deutsche Babcock Energie- Und Umwelttechnik Aktiengesellschaft Brenner
US5238395A (en) * 1992-03-27 1993-08-24 John Zink Company Low nox gas burner apparatus and methods
US5284438A (en) * 1992-01-07 1994-02-08 Koch Engineering Company, Inc. Multiple purpose burner process and apparatus

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3033273A (en) * 1959-11-09 1962-05-08 Zink Co John Fuel burner assembly
US3985494A (en) * 1975-06-26 1976-10-12 Howe-Baker Engineers, Inc. Waste gas burner assembly
US5135387A (en) * 1989-10-19 1992-08-04 It-Mcgill Environmental Systems, Inc. Nitrogen oxide control using internally recirculated flue gas
US5269678A (en) * 1990-09-07 1993-12-14 Koch Engineering Company, Inc. Methods and apparatus for burning fuel with low NOx formation
US5073105A (en) * 1991-05-01 1991-12-17 Callidus Technologies Inc. Low NOx burner assemblies

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4395223A (en) * 1978-06-09 1983-07-26 Hitachi Shipbuilding & Engineering Co., Ltd. Multi-stage combustion method for inhibiting formation of nitrogen oxides
EP0348646A2 (de) * 1988-06-30 1990-01-03 Deutsche Babcock Energie- Und Umwelttechnik Aktiengesellschaft Brenner
US5284438A (en) * 1992-01-07 1994-02-08 Koch Engineering Company, Inc. Multiple purpose burner process and apparatus
US5238395A (en) * 1992-03-27 1993-08-24 John Zink Company Low nox gas burner apparatus and methods
EP0562795A2 (de) * 1992-03-27 1993-09-29 John Zink Company, A Division Of Koch Engineering Company Inc. Gasbrenner und Brennverfahren mit niedriger NOx-Bildung

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0893651A1 (de) * 1997-07-22 1999-01-27 Entreprise Generale De Chauffage Industriel Pillard Brenner für flüssigen und gasförmigen Brennstoff mit niedriger Stickoxidemission
FR2766557A1 (fr) * 1997-07-22 1999-01-29 Pillard Chauffage Bruleurs a combustible liquide et gazeux a faible emission d'oxydes d'azote
EP0978685A1 (de) * 1998-08-07 2000-02-09 Entreprise Generale De Chauffage Industriel Pillard Verbesserung an Brennern mit Abgasrückführung und niedrigem Stickoxydausstoss
FR2782150A1 (fr) 1998-08-07 2000-02-11 Pillard Chauffage Perfectionnements aux bruleurs a recirculation de fumees et a faible emission d'oxydes d'azote
EP1074790A1 (de) * 1999-08-04 2001-02-07 Entreprise Generale De Chauffage Industriel Pillard Brenner mit Abgasrückführung
FR2797321A1 (fr) 1999-08-04 2001-02-09 Pillard Chauffage Bruleurs a recirculation de fumees et a faible emission d'oxydes d'azote et rechauffeurs de gaz comportant de tels bruleurs
FR2914398A1 (fr) * 2007-04-02 2008-10-03 Pillard Chauffage Bruleur a combustible gazeux
EP1980788A1 (de) * 2007-04-02 2008-10-15 Fives Pillard Brenner für gasförmigen Kraftstoff

Also Published As

Publication number Publication date
DE69509816D1 (de) 1999-07-01
ES2132551T3 (es) 1999-08-16
FR2718222B1 (fr) 1996-07-05
DE69509816T2 (de) 2000-01-27
US5634785A (en) 1997-06-03
EP0675321B1 (de) 1999-05-26
FR2718222A1 (fr) 1995-10-06
CA2145347A1 (fr) 1995-09-30

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