US20050239005A1 - Method and apparatus for heat treatment - Google Patents

Method and apparatus for heat treatment Download PDF

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Publication number
US20050239005A1
US20050239005A1 US10/528,546 US52854605A US2005239005A1 US 20050239005 A1 US20050239005 A1 US 20050239005A1 US 52854605 A US52854605 A US 52854605A US 2005239005 A1 US2005239005 A1 US 2005239005A1
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US
United States
Prior art keywords
oxygen
fuel
gas
nozzle
gas containing
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.)
Abandoned
Application number
US10/528,546
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English (en)
Inventor
Anders Lugnet
Tomas Ekman
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Linde GmbH
Original Assignee
Linde GmbH
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Filing date
Publication date
Application filed by Linde GmbH filed Critical Linde GmbH
Assigned to LINDE AG reassignment LINDE AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: EKMAN, TOMAS, LUGNET, ANDERS
Publication of US20050239005A1 publication Critical patent/US20050239005A1/en
Abandoned 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 
    • F23C1/00—Combustion apparatus specially adapted for combustion of two or more kinds of fuel simultaneously or alternately, at least one kind of fuel being either a fluid fuel or a solid fuel suspended in a carrier gas or air
    • 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 
    • F23C15/00—Apparatus in which combustion takes place in pulses influenced by acoustic resonance in a gas mass
    • 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
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/32—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid using a mixture of gaseous fuel and pure oxygen or oxygen-enriched air
    • 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 
    • F23C2202/00—Fluegas recirculation
    • F23C2202/30—Premixing fluegas with combustion air

Definitions

  • the present invention relates generally to a method and an apparatus for heat treatment of materials, preferably metals, and more particularly to heat treatment involving low NOx emissions in open flame and radiant tubes as well as a very high thermal efficiency.
  • oxy-fuel technology has successfully been used for many years. It provides great benefits regarding productivity and fuel consumption. Conventional oxy-fuel technology can also be used to achieve considerable reductions in NOx emissions compared to conventional air-fuel burner technology. However, oxy-fuel technology is relatively sensitive to air in-leakage into the combustion zone and requires good pressure control in the furnace. In some processes and furnace types it is very difficult to keep air from leaking into the system
  • NOx nitrous oxides
  • a further problem when using a conventional oxy-fuel burner for heat treatment of metals using radiant tubes is that the high flame temperature of an oxy-fuel burner will damage the tube material, which of course is unacceptable.
  • An object of the present invention is to provide a method and an apparatus for heat treatment of metals wherein the drawbacks of prior art apparatuses are eliminated or at least mitigated.
  • a particular object is to provide a method and an apparatus wherein emission of nitrous oxides (NOx) is kept to a minimum while maintaining a high degree of thermal efficiency and providing technology to use oxy-fuel combustion in radiant tubes.
  • NOx nitrous oxides
  • the invention is based on the realization that an oxy-fuel burner can be used for low NOx, high efficiency heat treatment of metals by providing for a recirculation of hot gas exhausts resulting from an ejector effect provided by the oxygen nozzles of the burner.
  • the method provides for an environmentally friendly and at the same time cost effective process.
  • the invention is used in combination with radiant tubes, allowing the invention to be used in protective atmosphere processes.
  • These atmospheres are normally all atmospheres other than the atmosphere resulting form combustion of hydrocarbons.
  • FIG. 1 shows a longitudinal elevation sectional view through an apparatus according to the invention
  • FIG. 2 is a transverse cross sectional view from line II-II of FIG. 1 ;
  • FIG. 3 is an overall sectional view of a burner and radiant tube arrangement
  • FIG. 4 is a diagram showing typical temperature profiles for different types of combustion
  • FIG. 5 is a diagram showing flame and recirculation temperatures during operation of an apparatus according to the invention.
  • FIG. 6 is a diagram showing resulting equilibrium NO concentrations as well as two measured results.
  • FIG. 1 there is shown a sectional view of a burner arrangement, generally designated 1 .
  • the burner arrangement comprises an insert 10 having a generally circular cross-section, see FIG. 2 .
  • the insert is arranged to be mounted through a hole in a wall 12 of a furnace (not shown), as is conventional. It is also preferred to arrange a heat insulating material 14 on the hot side of the burner mounting plate 12 .
  • a fuel supply pipe 16 is centrally provided for supplying fuel, such as natural gas, to a burner reaction zone or flame 26 , a portion of which is shown in FIG. 1 .
  • the fuel supply pipe is in one end provided with a connector arranged to be connected to a source of fuel (not shown) and in the other end with a fuel nozzle 16 a.
  • Oxygen is supplied through six equidistant pipes 18 placed at a constant distance from the centre axis of the insert 10 , see FIG. 2 .
  • the oxygen supply pipes are in one end provided with a respective connector arranged to be connected to a source of oxygen (not shown) and in the other end with a respective oxygen nozzle 18 a having a cross-sectional area of A 3 .
  • the oxygen nozzles are streamlined, thus minimizing turbulence of the oxygen leaving the nozzle, preferably at supersonic velocities. The effect of this will be explained further below.
  • An annular exhaust opening 20 is provided outside of the oxygen pipes 18 .
  • This opening is provided for accommodating recirculation of hot exhausts resulting from the heating process involving the burner.
  • the exhaust opening is separated from the oxygen pipes by a comparatively thin wall, thereby providing for a heat exchange between the hot exhausts from the burner process and the relatively cold oxygen supplied through the oxygen pipes 18 .
  • This heat exchange provides for a high thermal efficiency, in all cases above 90%, resulting in a very energy efficient process, with low exhaust gas temperatures.
  • a circular flame tube 22 at the front end portion of the insert, having a cross-sectional area A 2 and a diameter L 2 .
  • the flame tube surrounds the fuel and oxygen nozzles 16 a, 18 a and extends a distance L 1 from the oxygen nozzles.
  • the primary function of the flame tube is to form a mixing compartment for oxygen and recirculated exhaust gas in a first mixing step and to direct the resulting jet momentum forwards.
  • the tube 22 preferably has a cross-sectional area of more than 100 times the cross-sectional area of each of the gas nozzles 18 a.
  • the fuel can be any gaseous fuel, such as, natural gas, propane, coke oven gas, etc having a combustible content, or any liquid fuel, such as light to heavy fuel oil, emulsions containing carboneous substances, etc.
  • oxygen is in this context meant a gas with an O 2 content exceeding 80% by volume, and preferably exceeding 99.5%, i.e., essentially pure oxygen.
  • the oxidizing gas comprises other elements usually found in air, such as nitrogen and argon It is preferred that the oxidizing gas comprises less than 5.5% by volume nitrogen and less than 4.5% by volume argon.
  • a pilot burner (not shown) is provided in the insert 20 .
  • the oxygen in the oxygen containing gas and the fuel maintains the reaction zone 26 so as to provide a heating source.
  • the operation of the oxy-fuel burner 20 is controlled by means of the amount of fuel and oxygen supplied at high velocities through the fuel and oxygen pipes, respectively.
  • the oxy-fuel mixture results in the reaction zone 26 having properties, such as length, temperature etc., that are controlled by the supply rate of fuel and oxygen.
  • the recirculation factor, c/b is typically above 10.
  • the exhausts created in the process can contain among other things nitrogen, which, together with oxygen, forms unwanted ROx gases, mainly NO, which in nature is transformed into NO 2 .
  • the oxygen is supplied at high velocities, preferably at supersonic velocities, such as Mach 0.5 or above.
  • the oxygen is preferably injected to form a free jet to a distance of at least 15 nozzle diameters.
  • These velocities together with the configuration of the apertures 24 in the flame tube and the shape of the oxygen nozzles 18 a and positions thereof relatively to the respective hole, create an ejector effect sucking the flame exhausts into the flame tube, as indicated by arrows in FIG. 1 .
  • the oxygen nozzles are Laval shaped and aerodynamic.
  • This primary recirculation mixture preferably has a ratio by volume of oxygen to exhausts of at least six.
  • the mixing of oxygen and exhausts is preferably effected over a distance of at least 20 nozzle diameters by allowing the gas containing oxygen to impinge on the walls of the flame tube 22 .
  • the oxygen containing mixture resulting from the primary recirculation Prior to being ignited, the oxygen containing mixture resulting from the primary recirculation is further mixed with the fuel and more exhaust gas in a second recirculation step. Due to the supersonic speed of the injected oxygen, preferably having a velocity of Mach 0.5 or above, this mixing is also effected at that hing velocity. This mixture is thus ignited and forms an extended reaction zone. It is thus realised, that the combination of among other things the parameters A 1 , A 2 , A 3 , L 1 , and L 2 is of vital importance to effect the proper mixing of oxygen and exhausts. In a preferred embodiment, the following combination is provided: A 1 >>A 3 , A 2 ⁇ A 1 (area of all apertures 24 ), and/or L 1 ⁇ L 2 .
  • the higher oxygen content the higher temperature.
  • the high theoretical flame temperatures obtained with oxy-fuel burners could be disadvantageous in certain heat treatment processes wherein the material to be heated must be brought to very uniform temperatures.
  • the flame temperature is lowered to desired temperatures while the high NOx promoting temperatures are avoided, see FIG. 4 .
  • a secondary recirculation of exhausts is also provided just, down-stream of the flame tube 22 , as indicated by the arrows in FIG. 1 .
  • This additional dilution of the oxygen content further helps to lower the temperatures of the flame.
  • the visible portion of the reaction zone 26 starts at a distance from the fuel nozzle, allowing for the recirculation of the exhausts prior to ignition.
  • the effect of the recirculation factor, as defined above, and of the temperature of the recirculated exhaust gases on the resulting flame temperature can be seen in FIG. 5 .
  • FIG. 3 A second preferred embodiment of a burner arrangement according to the invention will now be described with reference to FIG. 3 , wherein a burner and radiant tube arrangement is shown.
  • a burner insert 10 is provided in an aperture in a furnace wall 12 .
  • a radiant tube, generally designated 30 is provided in front of the burner insert 10 and having a diameter exceeding that of the flame tube 22 .
  • the use of a radiant tube is known per se and the radiant tube 30 comprises an outer cylindrical tube 32 having a first open end facing the furnace wall 12 and a second closed end opposite of the first end.
  • an inner tube 34 having a diameter less than the inner diameter of the outer tube 32 so as to create an inner, essentially circular channel 36 and an outer, annular channel 38 .
  • the inner tube is kept in position in any suitable way, such as by means of flanges (not shown) extending outwardly there from.
  • the inner tube 34 is positioned with its first end ending a distance L 3 from the front end of the flame tube 22 of the burner and with its second end ending spaced apart from the closed end wall of the outer tube 32 , thereby providing a recirculation path for exhausts.
  • the reaction takes place in the inner channel 36 .
  • Exhausts created in the combustion process are guided through the inner channel, turn at the closed end of the outer cylinder 32 , and return in the opposite direction through the outer annular channel 38 .
  • the radiant tube forms an essentially closed system.
  • the exhausts returning to the burner 10 are guided either through the openings 24 in the flame tube, forming a primary recirculation path, or through the gap formed between the flame tube 22 and the inner tube 34 , forming a secondary recirculation path.
  • the proportion of exhausts of the first and secondary recirculation paths is determined e.g., by the parameters A 1 , A 2 , L 1 , L 2 , and L 3 as well as by the velocity of the oxygen and the fuel.
  • the burner arrangement according to the invention allows very high degree of recirculation of exhausts. This in turn allows for extremely low NOx emissions; figures showing as low as 0-25 mg/MJ NOx have been obtained during test runs, depending on the N 2 content. An oxygen content below 15% in the reaction zone has been found feasible.
  • a very high thermal efficiency is obtained, resulting in a cost-effective process.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
  • Pre-Mixing And Non-Premixing Gas Burner (AREA)
  • Combustion Of Fluid Fuel (AREA)
US10/528,546 2002-09-25 2003-09-25 Method and apparatus for heat treatment Abandoned US20050239005A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE0202836-3 2002-09-25
SE0202836A SE0202836D0 (sv) 2002-09-25 2002-09-25 Method and apparatus for heat treatment
PCT/SE2003/001492 WO2004029511A1 (en) 2002-09-25 2003-09-25 Method and apparatus for heat treatment

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US20050239005A1 true US20050239005A1 (en) 2005-10-27

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US (1) US20050239005A1 (pt)
EP (1) EP1543271A1 (pt)
JP (1) JP2006500543A (pt)
KR (1) KR20050062556A (pt)
AU (1) AU2003263721A1 (pt)
BR (1) BR0314741A (pt)
CA (1) CA2501062A1 (pt)
MX (1) MXPA05003198A (pt)
NO (1) NO20051955L (pt)
PL (1) PL374499A1 (pt)
RU (1) RU2005109915A (pt)
SE (1) SE0202836D0 (pt)
WO (1) WO2004029511A1 (pt)
ZA (1) ZA200502379B (pt)

Cited By (26)

* Cited by examiner, † Cited by third party
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US20070254251A1 (en) * 2006-04-26 2007-11-01 Jin Cao Ultra-low NOx burner assembly
US20080206693A1 (en) * 2004-02-25 2008-08-28 John Zink Company, Inc. Low NOx burner
US20090148799A1 (en) * 2007-12-10 2009-06-11 Aga Ab Method for burner and burner device
WO2010018315A1 (fr) * 2008-08-13 2010-02-18 Ifp Chambre d'oxy-combustion
US7670135B1 (en) * 2005-07-13 2010-03-02 Zeeco, Inc. Burner and method for induction of flue gas
US20120082946A1 (en) * 2010-09-30 2012-04-05 Anders Lugnet Method for carrying out combustion in an industrial furnace
DE102010051347A1 (de) 2010-11-13 2012-05-16 Messer Austria Gmbh Vorrichtung und Verfahren zum Oxidieren von Brennstoffen
US20120282558A1 (en) * 2011-05-05 2012-11-08 General Electric Company Combustor nozzle and method for supplying fuel to a combustor
US20130095437A1 (en) * 2011-04-05 2013-04-18 Air Products And Chemicals, Inc. Oxy-Fuel Furnace and Method of Heating Material in an Oxy-Fuel Furnace
US20130122436A1 (en) * 2011-11-11 2013-05-16 General Electric Company Combustor and method for supplying fuel to a combustor
CN103277795A (zh) * 2013-05-27 2013-09-04 中国科学院广州能源研究所 可调节烟气自身再循环燃气燃烧器
US8915731B2 (en) 2010-12-30 2014-12-23 L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Flameless combustion burner
US20150167971A1 (en) * 2011-11-23 2015-06-18 Honeywell International Inc. Burner with oxygen and fuel mixing apparatus
US9074762B2 (en) * 2009-08-03 2015-07-07 Siemens Aktiengesellschaft Stabilizing the flame of a burner
WO2015154969A1 (en) * 2014-04-10 2015-10-15 Sofinter S.P.A. Burner
FR3030689A1 (fr) * 2014-12-23 2016-06-24 Air Liquide Oxy-bruleur pour gaz combustible a bas pouvoir calorifique et son utilisation
US9593848B2 (en) 2014-06-09 2017-03-14 Zeeco, Inc. Non-symmetrical low NOx burner apparatus and method
US9593847B1 (en) 2014-03-05 2017-03-14 Zeeco, Inc. Fuel-flexible burner apparatus and method for fired heaters
US20170284659A1 (en) * 2014-09-02 2017-10-05 Linde Aktiengesellschaft LOW-NOx-BURNER
JP2018084389A (ja) * 2016-11-25 2018-05-31 新日鐵住金株式会社 加熱用バーナ、ラジアントチューブ、および鋼材の加熱方法
US10281140B2 (en) 2014-07-15 2019-05-07 Chevron U.S.A. Inc. Low NOx combustion method and apparatus
US10422525B2 (en) * 2015-09-14 2019-09-24 Taiyo Nippon Sanso Corporation Oxygen burner and operation method for oxygen burner
US10429072B2 (en) * 2013-09-23 2019-10-01 Bloom Engineering Company Inc. Regenerative burner for non-symmetrical combustion
EP3604923A1 (de) * 2018-07-31 2020-02-05 Linde Aktiengesellschaft Wärmerückgewinnungssystem für einen ofen mit einem oder mehreren brennern
EP3614049A1 (en) * 2018-08-22 2020-02-26 Linde Aktiengesellschaft A method of operating a burner for performing flameless combustion or at least semi flameless combustion and fluid supply system
US20220155014A1 (en) * 2019-03-11 2022-05-19 Sacmi Forni & Filter S.p.A. Apparatus and burner for the firing of ceramic articles

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DE102005005832B4 (de) * 2005-02-08 2006-11-02 Air Liquide Deutschland Gmbh Rekuperatorbrenner und Verfahren zum Erhitzen eines Industrieofens unter Einsatz des Brenners
US20070269755A2 (en) * 2006-01-05 2007-11-22 Petro-Chem Development Co., Inc. Systems, apparatus and method for flameless combustion absent catalyst or high temperature oxidants
RU2324745C2 (ru) * 2006-02-26 2008-05-20 Игорь Михайлович Дистергефт Способ тепловой обработки металла в пламенной печи прямого или косвенного нагрева (варианты), способ сжигания смеси жидкого или газообразного топлива и нагретого воздуха в пламенной печи прямого или косвенного нагрева, устройство отопления (варианты) и регенеративная насадка (варианты) для осуществления способов
KR101063375B1 (ko) 2006-12-22 2011-09-07 주식회사 케너텍 강제 내부 재순환을 이용한 산소부화 연소버너
EP2080952A1 (en) * 2008-01-17 2009-07-22 L'AIR LIQUIDE, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude Burner and method for alternately implementing an oxycombustion and an air combustion
SE534818C2 (sv) * 2010-05-06 2012-01-10 Cortus Ab Förfarande och anordning för införande av pulverformigt material i en förgasningsreaktor, varvid anordningen innefattar en lavaldysa
US20120009531A1 (en) 2010-07-12 2012-01-12 L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Distributed combustion process and burner
US8632621B2 (en) 2010-07-12 2014-01-21 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Method for melting a solid charge
FR2986855A1 (fr) * 2012-02-10 2013-08-16 Air Liquide Oxy-bruleur a injections multiples de combustible et procede d'oxy-combustion correspondant
EA032968B1 (ru) * 2017-02-17 2019-08-30 Сергей Михайлович Кабишов Способ экологически чистого сжигания углеводородного топлива
EP3727665A4 (en) 2017-12-20 2021-12-08 BD Energy Systems, LLC MICRO REFORMER

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* Cited by examiner, † Cited by third party
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US8794960B2 (en) * 2004-02-25 2014-08-05 John Zink Company, Llc Low NOx burner
US20080206693A1 (en) * 2004-02-25 2008-08-28 John Zink Company, Inc. Low NOx burner
US7670135B1 (en) * 2005-07-13 2010-03-02 Zeeco, Inc. Burner and method for induction of flue gas
US20070254251A1 (en) * 2006-04-26 2007-11-01 Jin Cao Ultra-low NOx burner assembly
US8696348B2 (en) * 2006-04-26 2014-04-15 Air Products And Chemicals, Inc. Ultra-low NOx burner assembly
US9341369B2 (en) 2007-12-10 2016-05-17 Aga Ab Method for burner and burner device
US8899970B2 (en) * 2007-12-10 2014-12-02 Aga Ab Method for burner and burner device
US20090148799A1 (en) * 2007-12-10 2009-06-11 Aga Ab Method for burner and burner device
FR2935040A1 (fr) * 2008-08-13 2010-02-19 Inst Francais Du Petrole Chambre d'oxy-combustion
US20110185954A1 (en) * 2008-08-13 2011-08-04 Colin Jerome Oxycombustion chamber
WO2010018315A1 (fr) * 2008-08-13 2010-02-18 Ifp Chambre d'oxy-combustion
US9074762B2 (en) * 2009-08-03 2015-07-07 Siemens Aktiengesellschaft Stabilizing the flame of a burner
US20120082946A1 (en) * 2010-09-30 2012-04-05 Anders Lugnet Method for carrying out combustion in an industrial furnace
US9689614B2 (en) * 2010-09-30 2017-06-27 Linde Aktiengesellschaft Method for carrying out combustion in an industrial furnace
EP2453174A1 (de) 2010-11-13 2012-05-16 Messer Austria GmbH Strahlungheizrohrbrenner-Vorrichtung mit interner und externer Rekuperation
DE102010051347A1 (de) 2010-11-13 2012-05-16 Messer Austria Gmbh Vorrichtung und Verfahren zum Oxidieren von Brennstoffen
US8915731B2 (en) 2010-12-30 2014-12-23 L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Flameless combustion burner
US9285113B2 (en) 2010-12-30 2016-03-15 L'Air Liquide Société Anonyme Pour L'Étude Et L'Exploitation Des Procedes Georges Clause Distributed combustion process and burner
US20130095437A1 (en) * 2011-04-05 2013-04-18 Air Products And Chemicals, Inc. Oxy-Fuel Furnace and Method of Heating Material in an Oxy-Fuel Furnace
US20120282558A1 (en) * 2011-05-05 2012-11-08 General Electric Company Combustor nozzle and method for supplying fuel to a combustor
US20130122436A1 (en) * 2011-11-11 2013-05-16 General Electric Company Combustor and method for supplying fuel to a combustor
US20150167971A1 (en) * 2011-11-23 2015-06-18 Honeywell International Inc. Burner with oxygen and fuel mixing apparatus
US9995483B2 (en) * 2011-11-23 2018-06-12 Honeywell International Inc. Burner with oxygen and fuel mixing apparatus
CN103277795A (zh) * 2013-05-27 2013-09-04 中国科学院广州能源研究所 可调节烟气自身再循环燃气燃烧器
US10429072B2 (en) * 2013-09-23 2019-10-01 Bloom Engineering Company Inc. Regenerative burner for non-symmetrical combustion
US9593847B1 (en) 2014-03-05 2017-03-14 Zeeco, Inc. Fuel-flexible burner apparatus and method for fired heaters
WO2015154969A1 (en) * 2014-04-10 2015-10-15 Sofinter S.P.A. Burner
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KR20050062556A (ko) 2005-06-23
AU2003263721A1 (en) 2004-04-19
WO2004029511A1 (en) 2004-04-08
CA2501062A1 (en) 2004-04-08
NO20051955D0 (no) 2005-04-21
JP2006500543A (ja) 2006-01-05
MXPA05003198A (es) 2005-09-12
BR0314741A (pt) 2005-07-26
EP1543271A1 (en) 2005-06-22
ZA200502379B (en) 2005-11-30
PL374499A1 (en) 2005-10-31
NO20051955L (no) 2005-06-24
SE0202836D0 (sv) 2002-09-25
RU2005109915A (ru) 2005-10-10

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