US3730668A - Combustion method of gas burners for suppressing the formation of nitrogen oxides and burner apparatus for practicing said method - Google Patents

Combustion method of gas burners for suppressing the formation of nitrogen oxides and burner apparatus for practicing said method Download PDF

Info

Publication number
US3730668A
US3730668A US00145728A US3730668DA US3730668A US 3730668 A US3730668 A US 3730668A US 00145728 A US00145728 A US 00145728A US 3730668D A US3730668D A US 3730668DA US 3730668 A US3730668 A US 3730668A
Authority
US
United States
Prior art keywords
combustion
nozzle portion
combustion chamber
nitrogen oxides
formation
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
US00145728A
Other languages
English (en)
Inventor
H Iida
K Watanabe
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.)
Tokyo Gas Co Ltd
Original Assignee
Tokyo Gas 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 Tokyo Gas Co Ltd filed Critical Tokyo Gas Co Ltd
Application granted granted Critical
Publication of US3730668A publication Critical patent/US3730668A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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 
    • 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
    • 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

Definitions

  • ABSTRACT The present invention relates to a novel method for 22 Filed: May 21,1971
  • the latter method has the disadvantage that, since the mixing ratio of fuel gas and air tends to be inconsistent, the excess air ratio must be made slightly greater than with the ordinary combustion method, with the result that the formation of nitrogen oxides is further promoted. It has further disadvantages in that means must be provided for supplying the secondary air and in that the combustion flame becomes undesirably long.
  • FIG. 1 is a vertical cross-sectional view illustrating an embodiment of the burner apparatus according to the present invention
  • FIG. 3 is a diagram graphically showing the combustion characteristic of the burner apparatus with respect to the amounts of nitrogen oxides generated during combustion.
  • air required for combustion is supplied through an air inlet port 10 and part of the air, i.e., a quantity of air 60 percent of the theoretical air requirement, is introduced in to the combustion chamber 1 through the primary air passage holes 7 formed in the air flow equalizing plate 6.
  • the remaining part of the air enters the air passageway 3 through the secondary air passage holes 4 and-reaches the. end extremity of the nozzle portion 2 after passing through said airpa'ssageway 3.
  • a fuel gas is fed into the combustion chamber 1 from the fuel gas feed pipe 8, and intensely mixed with the primary air and burned therein.
  • the load in the combustion'chamber reaches as high as about 5,000 10,000-X l0 Kcal/m hr.
  • the cornbustion gases contain some .amount of unburned fuel gas because only the primary airis introduced into the combustion chamber 1, and is exhausted from the nozzle portion 2 to the outside of the combustion chamber at a high velocity of 50 200 m/zsec.
  • the combustion gases exhaustedat such ahigh velocityare mixed with the secondary air supply which has cooled the outer wall of the combustion chamber 1, while moving in parallel or at an angle to the secondary air supply, and enter the draft tube5, ahead of the nozzle portion 2, while undergoing secondary combustion.
  • Characteristic curve A in the chart of FIG. 3 represents the result of combustion obtained by the method and apparatus of the instant invention. It will be apparent from this characteristic curve that according to the invention, that the amounts of nitrogen oxides can be substantially decreased as compared with the conventional burner apparatus, the characteristic of which is represented by a curve E.
  • the secondary air passageway 3 is formed around the combustion chamber 1 and the draft tube is provided ahead of the nozzle portion 2, the amounts of nitrogen oxides formed can be substantially decreased as compared with the conventional burner E, by employing the combustion chamber 1 only of the construction described without providing said secondary air passageway 3 and said draft tube 5.
  • the theoretical quantity of air for combustion is introduced into the combustion chamber 1 in its entirety but the cross-sectional area ratio between the nozzle portion 2 and the combustion chamber 1 must be made smaller and the residence time of the air in the combustion chamber 1 must be made shorter than in the case of providing the secondary air passageway 3, so that the combustion may not be completed within said combustion chamber.
  • the combustion gases containing some amount of unburned fuel gas are exhausted from the nozzle portion 2 at a high velocity.
  • Curve C in FIG. 3 represents the combustion characteristics of a burner apparatus in which the secondary air passageway 3 is provided around the combustion chamber 1 but the draft tube 5 is not provided ahead of said combustion chamber.
  • the amount of the combustion gases withdrawn from the furnace is smaller than in case of the first-mentioned case but, since the secondary air supply is through the secondary air passageway 3 and is used for the secondary combustion, the amounts of nitrogen oxides formed can be substantially decreased.
  • the present invention achieves a remarkable effect in suppressing the fonnation of nitrogen oxides, due to a combination of factors including the fact that the primary combustion is a fuel-rich combustion, that the combustion is effected stepwise by the primary and secondary combustions, that the secondary combustion reaction is carried out while the temperature of the fuel gas is being lowered by combustion of the gases in the furnace, that the residence time of the combustion gases within the furnace is long, and that the length of the flame is short. Further, as will be understood from FIG.
  • the general heating apparatus can be simplified.
  • a combustion method for suppressing the formation of nitrogen oxides issuing from gas burners, according to claim 1, wherein a secondary air supply in a quantity of 10 40 percent of the theoretical quantity of air for combustion is passed along the outer wall of said combustion chamber and the unburned fuel gas contained in the combustion gases jetting from said nozzle port is completely burned by said secondary air outside the burner apparatus.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
US00145728A 1971-03-03 1971-05-21 Combustion method of gas burners for suppressing the formation of nitrogen oxides and burner apparatus for practicing said method Expired - Lifetime US3730668A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1120771 1971-03-03

Publications (1)

Publication Number Publication Date
US3730668A true US3730668A (en) 1973-05-01

Family

ID=11771549

Family Applications (1)

Application Number Title Priority Date Filing Date
US00145728A Expired - Lifetime US3730668A (en) 1971-03-03 1971-05-21 Combustion method of gas burners for suppressing the formation of nitrogen oxides and burner apparatus for practicing said method

Country Status (4)

Country Link
US (1) US3730668A (enrdf_load_stackoverflow)
DE (1) DE2129357C3 (enrdf_load_stackoverflow)
FR (1) FR2127487A5 (enrdf_load_stackoverflow)
GB (1) GB1354591A (enrdf_load_stackoverflow)

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3837788A (en) * 1971-11-15 1974-09-24 Aqua Chem Inc Reduction of gaseous pollutants in combustion fuel gas
US3868211A (en) * 1974-01-11 1975-02-25 Aqua Chem Inc Pollutant reduction with selective gas stack recirculation
US3905745A (en) * 1973-07-31 1975-09-16 Denyo Kagaku Kogyo Kk Method of preventing formation of harmful combustion gases in combustion furnace
US3914091A (en) * 1973-03-01 1975-10-21 Tokyo Gas Co Ltd Combustion method for hydrocarbonic fuels with low emission of nitrogen oxides
US3918834A (en) * 1973-08-09 1975-11-11 Isaak Yakovlevich Sigal Method of reducing the concentration of nitrogen oxides in a gaseous effluent from a thermal plant
US3955909A (en) * 1971-11-15 1976-05-11 Aqua-Chem, Inc. Reduction of gaseous pollutants in combustion flue gas
US4018554A (en) * 1975-03-19 1977-04-19 Institutul Pentru Creatie Stintifica Si Tehnica-Increst Method of and apparatus for the combustion of liquid fuels
US4021188A (en) * 1973-03-12 1977-05-03 Tokyo Gas Company Limited Burner configurations for staged combustion
US4063870A (en) * 1974-11-06 1977-12-20 Stein Industrie Combustion of hot gases of low calorific power
US4113417A (en) * 1974-11-06 1978-09-12 Stein Industrie Combustion of hot gases of low calorific power
US4144017A (en) * 1976-11-15 1979-03-13 The Babcock & Wilcox Company Pulverized coal combustor
US4204402A (en) * 1976-05-07 1980-05-27 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Reduction of nitric oxide emissions from a combustor
US4232650A (en) * 1977-08-30 1980-11-11 Baffle Stove Company Inc. Baffled stove
US4408982A (en) * 1982-01-05 1983-10-11 Union Carbide Corporation Process for firing a furnace
US4875850A (en) * 1986-11-07 1989-10-24 Gaz De France Gas burner of the blown air and premixture type
US5055032A (en) * 1988-10-12 1991-10-08 Ruhrgas Aktiengesellschaft A burner with a flame retention device
US5096412A (en) * 1991-01-28 1992-03-17 The United States Of America As Represented By The Secretary Of The Army Combustion chamber for multi-fuel fired ovens and griddles
US5269679A (en) * 1992-10-16 1993-12-14 Gas Research Institute Staged air, recirculating flue gas low NOx burner
DE4336095A1 (de) * 1993-10-22 1995-04-27 Abb Research Ltd Verbrennungsverfahren für atmosphärische Feuerungen und Vorrichtung zur Durchführung des Verfahrens
US5413477A (en) * 1992-10-16 1995-05-09 Gas Research Institute Staged air, low NOX burner with internal recuperative flue gas recirculation
WO2002044617A1 (de) * 2000-11-30 2002-06-06 Messer Griesheim Gmbh Verbrennungsverfahren und impulsstromgesteuerte brennstoff/sauerstofflanze
US20060204912A1 (en) * 2005-03-08 2006-09-14 Miura Co., Ltd. Combustion apparatus
US9995481B2 (en) 2011-12-20 2018-06-12 Eclipse, Inc. Method and apparatus for a dual mode burner yielding low NOx emission
US10260742B2 (en) * 2012-06-22 2019-04-16 Ferndale Investments Pty Ltd Heating torch

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1449267A (en) * 1972-12-21 1976-09-15 Aqua Chem Inc Apparatus for and a method of burning fuel
JPS52148839A (en) * 1976-06-04 1977-12-10 Hitachi Ltd Gas burner
US4157890A (en) * 1977-09-26 1979-06-12 John Zink Company NOx abatement in gas burning where air is premixed with gaseous fuels prior to burning
DE2908427C2 (de) * 1979-03-05 1983-04-14 L. & C. Steinmüller GmbH, 5270 Gummersbach Verfahren zur Verminderung der NO↓X↓-Emission bei der Verbrennung von stickstoffhaltigen Brennstoffen
JPS5714106A (en) * 1980-06-27 1982-01-25 Kawasaki Steel Corp Method and apparatus for combustion with low nox in radiant tube burner
DE3040830C2 (de) * 1980-10-30 1990-05-31 L. & C. Steinmüller GmbH, 5270 Gummersbach Verfahren zur Verminderung der NO↓X↓ -Emission bei der Verbrennung von stickstoffhaltigen Brennstoffen
GB2127952A (en) * 1982-09-29 1984-04-18 British Gas Corp Burner assembly
DE3422229C2 (de) * 1984-06-15 1986-06-05 WS Wärmeprozesstechnik GmbH, 7015 Korntal-Münchingen Industriebrenner für gasförmige oder flüssige Brennstoffe
AT397556B (de) * 1988-02-11 1994-05-25 Vaillant Gmbh Verfahren zum verbrennen eines gasgemisches sowie brenner zur durchführung dieses verfahrens
DE3835381A1 (de) * 1988-10-18 1990-04-19 Ruhrgas Ag Brenner
DE9007627U1 (de) * 1990-01-18 1993-06-03 Kraft-Industriewärmetechnik Dr. Ricke GmbH, 8759 Hösbach Brenner mit niedriger NOx-Emission
DE4238718A1 (de) * 1992-11-17 1994-05-19 Hoval Interliz Ag Vaduz Neugut Verfahren und Vorrichtung zum Verbrennen von Heizöl
FI101419B (fi) * 1996-11-26 1998-06-15 Teollisuuslaempoe Oy Kaasujen polttolaite
DE29816864U1 (de) * 1998-09-19 2000-01-27 Viessmann Werke GmbH & Co., 35108 Allendorf Heizkesselgebläsebrenner

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2451626A (en) * 1945-02-12 1948-10-19 Stewart Warner Corp Air flow regulating valve
US2499207A (en) * 1945-12-22 1950-02-28 John J Wolfersperger Pressure-type burner and method of burning fuel
US2577918A (en) * 1946-05-08 1951-12-11 Kellogg M W Co Air jacketed combustion chamber flame tube
US2665748A (en) * 1949-05-27 1954-01-12 Frank H Cornelius Fuel burner
US3048131A (en) * 1959-06-18 1962-08-07 Babcock & Wilcox Co Method for burning fuel
US3212553A (en) * 1961-12-14 1965-10-19 Marie Edouard Joseph Cathala Method and apparatus for burning liquids of low volatility

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2451626A (en) * 1945-02-12 1948-10-19 Stewart Warner Corp Air flow regulating valve
US2499207A (en) * 1945-12-22 1950-02-28 John J Wolfersperger Pressure-type burner and method of burning fuel
US2577918A (en) * 1946-05-08 1951-12-11 Kellogg M W Co Air jacketed combustion chamber flame tube
US2665748A (en) * 1949-05-27 1954-01-12 Frank H Cornelius Fuel burner
US3048131A (en) * 1959-06-18 1962-08-07 Babcock & Wilcox Co Method for burning fuel
US3212553A (en) * 1961-12-14 1965-10-19 Marie Edouard Joseph Cathala Method and apparatus for burning liquids of low volatility

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3837788A (en) * 1971-11-15 1974-09-24 Aqua Chem Inc Reduction of gaseous pollutants in combustion fuel gas
US3955909A (en) * 1971-11-15 1976-05-11 Aqua-Chem, Inc. Reduction of gaseous pollutants in combustion flue gas
US3914091A (en) * 1973-03-01 1975-10-21 Tokyo Gas Co Ltd Combustion method for hydrocarbonic fuels with low emission of nitrogen oxides
US4021188A (en) * 1973-03-12 1977-05-03 Tokyo Gas Company Limited Burner configurations for staged combustion
US3905745A (en) * 1973-07-31 1975-09-16 Denyo Kagaku Kogyo Kk Method of preventing formation of harmful combustion gases in combustion furnace
US3918834A (en) * 1973-08-09 1975-11-11 Isaak Yakovlevich Sigal Method of reducing the concentration of nitrogen oxides in a gaseous effluent from a thermal plant
US3868211A (en) * 1974-01-11 1975-02-25 Aqua Chem Inc Pollutant reduction with selective gas stack recirculation
US4063870A (en) * 1974-11-06 1977-12-20 Stein Industrie Combustion of hot gases of low calorific power
US4113417A (en) * 1974-11-06 1978-09-12 Stein Industrie Combustion of hot gases of low calorific power
US4018554A (en) * 1975-03-19 1977-04-19 Institutul Pentru Creatie Stintifica Si Tehnica-Increst Method of and apparatus for the combustion of liquid fuels
US4204402A (en) * 1976-05-07 1980-05-27 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Reduction of nitric oxide emissions from a combustor
US4144017A (en) * 1976-11-15 1979-03-13 The Babcock & Wilcox Company Pulverized coal combustor
US4232650A (en) * 1977-08-30 1980-11-11 Baffle Stove Company Inc. Baffled stove
US4408982A (en) * 1982-01-05 1983-10-11 Union Carbide Corporation Process for firing a furnace
US4875850A (en) * 1986-11-07 1989-10-24 Gaz De France Gas burner of the blown air and premixture type
US5055032A (en) * 1988-10-12 1991-10-08 Ruhrgas Aktiengesellschaft A burner with a flame retention device
US5096412A (en) * 1991-01-28 1992-03-17 The United States Of America As Represented By The Secretary Of The Army Combustion chamber for multi-fuel fired ovens and griddles
US5269679A (en) * 1992-10-16 1993-12-14 Gas Research Institute Staged air, recirculating flue gas low NOx burner
US5413477A (en) * 1992-10-16 1995-05-09 Gas Research Institute Staged air, low NOX burner with internal recuperative flue gas recirculation
DE4336095A1 (de) * 1993-10-22 1995-04-27 Abb Research Ltd Verbrennungsverfahren für atmosphärische Feuerungen und Vorrichtung zur Durchführung des Verfahrens
WO2002044617A1 (de) * 2000-11-30 2002-06-06 Messer Griesheim Gmbh Verbrennungsverfahren und impulsstromgesteuerte brennstoff/sauerstofflanze
US20060204912A1 (en) * 2005-03-08 2006-09-14 Miura Co., Ltd. Combustion apparatus
US7771192B2 (en) * 2005-03-08 2010-08-10 Miura Co., Ltd. Combustion apparatus
US9995481B2 (en) 2011-12-20 2018-06-12 Eclipse, Inc. Method and apparatus for a dual mode burner yielding low NOx emission
US10260742B2 (en) * 2012-06-22 2019-04-16 Ferndale Investments Pty Ltd Heating torch

Also Published As

Publication number Publication date
DE2129357B2 (de) 1978-11-30
DE2129357A1 (de) 1972-09-14
FR2127487A5 (enrdf_load_stackoverflow) 1972-10-13
GB1354591A (en) 1974-06-05
DE2129357C3 (de) 1979-10-11

Similar Documents

Publication Publication Date Title
US3730668A (en) Combustion method of gas burners for suppressing the formation of nitrogen oxides and burner apparatus for practicing said method
US4541796A (en) Oxygen aspirator burner for firing a furnace
US4790743A (en) Method of reducing the nox-emissions during combustion of nitrogen-containing fuels
US4378205A (en) Oxygen aspirator burner and process for firing a furnace
US3868211A (en) Pollutant reduction with selective gas stack recirculation
US4928481A (en) Staged low NOx premix gas turbine combustor
US3174526A (en) Atomizing burner unit
US4021186A (en) Method and apparatus for reducing NOx from furnaces
US5458481A (en) Burner for combusting gas with low NOx production
US3954382A (en) Combustion apparatus and method
JP3557028B2 (ja) 燃焼バーナ及びその炉内燃焼方法
SU955866A3 (ru) Устройство дл подачи и сжигани дополнительного топлива в шахтной печи
US5059117A (en) Radiant tube furnace and method of burning a fuel
EP0486169B1 (en) Low NOx burner
US3174474A (en) Radiant heating units
CN110822705B (zh) 燃烧换热装置、燃气壁挂炉和燃气热水器
EP0076036B1 (en) Method and apparatus for burning fuel in stages
US5681159A (en) Process and apparatus for low NOx staged-air combustion
CN104132343B (zh) 一种辐射管燃烧器
CN105531541B (zh) 用于燃烧气体燃料或者液体燃料的燃烧器组件和方法
US3846066A (en) Fuel burner apparatus
JPS63238308A (ja) 放射チューブバーナーによる燃焼方法とそのバーナー
CN114294962A (zh) 一种梭式窑天然气纯氧烧嘴和梭式窑
JPS5816108A (ja) バ−ナ
CN218095918U (zh) 一种适用于镀锌炉用的超低氮氧化物烧嘴