US3376098A - Two-chamber burner and process - Google Patents

Two-chamber burner and process Download PDF

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Publication number
US3376098A
US3376098A US57582066A US3376098A US 3376098 A US3376098 A US 3376098A US 57582066 A US57582066 A US 57582066A US 3376098 A US3376098 A US 3376098A
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burner
air
fuel
housing
primary
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Robert C Pryor
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ConocoPhillips Co
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ConocoPhillips Co
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D17/00Burners for combustion conjointly or alternatively of gaseous or liquid or pulverulent fuel
    • F23D17/002Burners for combustion conjointly or alternatively of gaseous or liquid or pulverulent fuel gaseous or liquid fuel
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23CMETHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C6/00Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion
    • F23C6/04Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection
    • F23C6/042Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection with fuel supply in stages

Description

United States Patent O 3,376,098 TWO-CHAMBER BURNER AND PROCESS Robert C. Pryor, Bartlesville, Okla., assigner to Phillips Petroleum Company, a corporation of Delaware Filed Aug. 29, 1966, Ser. No. 575,820 6 Claims. (Cl. 431-10) This invention relates to a burner and to a process for burning liquid fuel which requires lower air pressure and is more efficient and more versatile than conventional burners.

Burners utilizing liquid hydrocarbons, such as LPG, liquid propane, fuel oil, etc., are in use in a number of applications, such as in the heating of rock aggregates for making asphalt or bituminous paving. One application of the burner is disclosed in my copending application S.N. 456,371, filed May 17, 1965, now Patent No. 3,336,019.

One problem in burners of the character described is that of efiiciently combusting all of the fuel supplied to the burner. A disadvantage of conventional burners lies in the relatively high air pressure required to operate the burner at reasonable efficiency. Also, conventional burners are less efiicient than is desirable.

This invention is concerned with a burner structure and process for high efiiciency in burning various liquid hydrocarbon fuels up to and including asphalt, which operates on substantially lower air pressure than is required in conventional burners.

Accordingly, it is an object of the invention to provide a burner of improved construction. Another object is to provide a two-chamber burner which burns liquid fuels more efiiciently than conventional burners and with lower air pressure in the air supply to the burner. A further object is to provide a burner and burner process which is adaptable to a wide range of uses. Another object is to provide a process for burning liquid fuels of a wide range of gravity and viscosity at high efiiciency and with low air pressure. Other objects of the invention will become apparent to one skilled in the art upon consideration of the accompanying disclosure.

The invention is best understood by reference to the accompanying schematic drawing of which FIGURE 1 is an elevation in partial section of a preferred embodiment of the burner of the invention and FIGURE 2 is a plan view of the burner ring of FIGURE 1.

Referring to the drawing, burner comprises a preheating or booster section 12, a primary combustion section 14, and a fuel injection section 16, Each section is enclosed within a metal shell 18 and a header 20 closes the upstream end of section 12. Section 16 is coupled to section 12 by means of flanges 22 and bolts not shown. Section 14 is coupled to section 16 by similar fianges 24.

The precombustion or booster section 12 comprises a generally cylindrical, hollow, refractory burner body 26 enclosing a main combustion section 28 which tapers at the upstream end to a burner compartment 30 containing a burner 32. The outlet end or downstream end of the booster combustion section 28 converges to a throat 34 leading into an open gas space 36 extending from the downstream end of refractory burner body 26 thru section 16 into section 14. Refractory burner body 26 is supported at the downstream end by a spider arrangement, one leg of which is designated 38. The upstream end of this burner body is supported directly from header 20. The structure shown provides a sizeable annulus 40 surrounding burner body 26 which serves as a preheating zone or compartment for air introduced thru the shell 18 via conduit 42 under control of damper 44, air being supplied to this conduit by blower 46 in line 48. Throat 34 of restricted cross section is essential to eiiicient operation of the burner in that it has an eduction effect on air in annulus 40 and jets the hot gases into section 14.

Burner 32 is supplied air from conduit S0 which connects with conduit 42, the flow being controlled by damper 52. A suitable fuel gas, such as natural gas or propane, from line 54 is passed thru line 56 into burner 32 for admixture with air from conduit 50. Ignition of burner 32 is effected by an ignition means 58 comprising a small burner 60 which receives fuel gas from line 62 and air from line 64 to form a combustible mixture which is ignited by igniter 66 which may be a conventional spark plug or similar device.

Fuel injection section 16 comprises a portion of the free gas space 36 extending into the downstream burner described hereinafter and is provided with a fuel injection tubular ring 70 supported by spider arrangement 72 and connected with a fuel conduit 74 which is fed from a suitable fuel source via line 76. Fuel injection orifices or nozzles 78 are spaced uniformly around the tubular ring 70 so as to spray the liquid fuel in a general, conical pattern indicated by dotted lines 80. Primary burner section 14 comprises a refractory burned body 82 which may be cylindrical or ared downstream in the form of a frusto conical member. A long, cylindrical burner body 82 produces a long, narrow ame, whereas a ared burner body produces a shorter, bushier flame.

Referring to FIGURE 2, which is a plan View of the burner ring 70 looking upstream, nozzles or orifices 78 are directed to a common center 81 downstream of the burner ring as shown in FIGURE 1 by cone 80.

The internal diameter of refractory 26 (combustion section 28) should be approximately 1% times the diameter of throat 34, Refractory 26 should be about 11/2" in thickness and about 4 times the throat diameter and cylindrical chamber 28 should be about 4 times the throat diameter. The overall length of refractory 26 is about 5 times the throat diameter and the tapers are about 45 with the axis of the burner. In a burner constructed and tested, throat 34 had a diameter of 4 and a length of 3". The annulus 40 was about 2 on the radius of the preheat refractory section to give about 8,000 feet per minute air velocity thru the annulus and the fuel ring 70.

Fuel ring 70 is constructed of 1/2 O D. stainless steel tubing with a diameter substantially the same as the internal diameter of burner body 82, or 9". Ring 70 was constructed with l2 orifices sized to hold pressure on the fuel (LPG) of about 30 p.s.i. above its vapor pressure. Burner body 82 is 11/2 thick, 12" long, and 9" LD.

In operation, burner 32 is ignited in obvious manner by means of device S8 and the injected fuel and air are burned in booster burner 26 to eject a flame and combustion gases thru throat 34 represented by line 84. The refractory burner body 26 becomes hot and the air fed into annulus 40 from conduit 42 by blower 46 becomes heated to an elevated temperature in the range of about 1200 to 1500 F. as it passes thru ring 70 into burner 82. When the air reaches the desired operating temperature, liquid fuel injection thru ring 70 is initiated and the injected liquid fuel mixes with the hot air and is burned in the primary burner enclosed within burner body 82 to form a flame 86 projecting from the mouth of the burner. The air pressure in annular zone 40 is maintained in the range of about 7 to 10 oz, for efiicient operation. The weight ratio of fuel burned in the upstream combustion zone to that burned in the primary combustion zone is in the range of 1:8 to 1:10.

The burner of the invention has numerous advantages over prior art burners. This burner burns only about 70 percent of the amount of fuel burned in conventional burners for liquid propane to accomplish the same heating, due to the higher eiciency of the burner resulting from the preheating of air and the manner of using this preheated air. The burner described has been constructed and used in burning various types of liquid fuels ranging from liquid propane to asphalt. These fuels are burned in the burner in a smoke-free ame which can be yadjusted from 3 feet in length to 40 feet in length, using about 8 ounces of air pressure. The burner eliminates the necessity of tuyeres, which substantially reduces the cost of the burner construction. Also, the shape of the flame 86 can be varied from long and slender to short and bushy by utilizing a long, cylindrical burner body 82 for a long, slender flame and a diverging frusto conical burner body for a short, bushy flame, of course, with regulation of fuel and air pressure to assist in the control of the flame. Another advantage lies in the fact that the burner requires no change in the nozzle ring and orifices to change from liquid propane to fuel oil and heavier fuels.

In a burner for heating rock aggregate in a kiln for making bituminous paving, an 80-horsepower blower has been used on previous burners using a fuel oil feed, whereas the present burner requires only -horsepower on the blower for similar duty. Similarly, when burning LPG, iO-horsepower was required on conventional burners, whereas the instant burner required only 30-horsepower on the blower. This saving in energy is due to the more emcient operation of the burner with not more than onehalf the air pressure required in conventional burners.

Certain modifications of the invention will become apparent to those skilled in the art and the illustrative details disclosed are not to be construed as imposing unnecessary limitations on the invention.

I claim:

1. A burner comprising in combination:V

(a) a burner housing of generally cylindrical, elongated configuration;

(b) a hollow, elongated refractory booster burner body xed in the upstream end of said housing coaxial therewith and forming an axial booster burner combustion chamber and a surrounding air heating annulus with said housing, said chamber having a restricted outlet on its downstream end and a burner in the upstream end thereof;

(c) means for feeding a combustible mixture of fuel gas and air to the burner of (b) and means for igniting same;

(d) means for feeding primary air to said heating annulus;

(e) an elongated hollow refractory primary burner body coaxial with said housing in the downstream end thereof spaced from the burner body of (b) to provide a substantial free gas space therebetween and Aforming an axial primary combustion chamber;

(f) a hollow fuel ring in the gas space of (e) coaxial with said housing having orifices therein directed in a yconical pattern downstream into the primary combustion chamber of (e), said free gas space communicating between the annulus of (b) and said primary cornbustion chamber to provide for flow of heated combustion air from said annulus to said primary combustion chamber; and

(g) means for feeding fluid fuel to the fuel ring of (f).

2. The burner of claim 1 wherein the burner body of (e) is cylindrical.

3. The burner of claim 1 wherein the burner body of (e) is ared outwardly downstream.

4. The burner of claim 1 wherein the boostertburner body of (b) comprises a main cylindrical central section converging at the upstream end into a housing for the burner of (b) extending outside of said housing and at the downstream end into a cylindrical throat section for directing flame and combustion gases thru the fuel ring of (f) as an eductor for primary air from the annulus of (b).

5. A process for burning a liquid fuel which comprises the steps of:

(a) burning a mixture of fuel gas and air in an upstream combustion zone to form ame and combustion gases;

(b) directing the dame and combustion gases from step (a) thru a restricted throat in the downstream section of said combustion zone and axially thru a fuel ring into a primary combustion Zone in alignment with the combustion Zone of (a);

(c) feeding primary combustion air into an enclosed annular heating zone open on the downstream end to the primary combustion zone of (b) immediately surrounding the upstream combustion zone of (a) so as to substantially heat said primary air, the passage of said flame and hot combustion gases thru said throat and ring educting primary air from said annulus into said primary combustion zone around and thru said ring;

(d) injecting liquid fuel from said fuel ring thru nozzles therein in a generally conical spray directed downstream so that said liquid fuel is heated, vaporized, and mixed with heated air .and said combustion gases and burned insaid primary combustionl zone; and (e) maintaining air pressure in said annular heating Zone in the range of about 7 to l() oz.

6. The process of claim 5 wherein the weight ratio of fuel burned in said upstream combustion zone to that burned in said primary combustion zone is in the range of about 1:8 to 10:10.

References Cited UNITED STATES PATENTS 2,753,925 7/1956 Campbell et al. 158-11 2,918,118 12/1959 Schirmer 158-4 2,988,887 6/1961 Milliken 158-4 X 3,091,446 5/1963 Smith 263-52 3,273,621. 9/1966 Childree 158-11 X FREDERICK L. MATTESON, In., Primary Examiner.

E. G. FAVORS, Assistant Examiner.

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,376,098 April 2, 1968 Robert C. Pryor It s certified that error appears in the above identified patent and that said Letters Patent are hereby corrected as shown below:

Column 4, line 46, "10:10" should read 1:10 Signed and sealed this 14th day of October 1969.

(SEAL) Attest:

Edward M. Fletcher, Jr. WILLIAM E. SCHUYLER, JR.

Attesting Officer Commissioner of Patents

Claims (1)

1. A BURNER COMPRISING IN COMBINATION: (A) A BURNER HOUSING OF GENERALLY CYLINDRICAL, ELONGATED CONFIGURATION; (B) A HOLLOW, ELONGATED REFRACTORY BOOSTER BURNER BODY FIXED IN THE UPSTREAM END OF SAID HOUSING COAXIAL THEREWITH AND FORMING AN AXIAL BOOSTER BURNER COMBUSTION CHAMBER AND A SURROUNDING AIR HEATING ANNULUS WITH SAID HOUSING, SAID CHAMBER HAVING A RESTRICTED OUTLET ON ITS DOWNSTREAM END AND A BURNER IN THE UPSTREAM END THEREOF; (C) MEANS FOR FEEDING A COMBUSTIBLE MIXTURE OF FUEL GAS AND AIR TO THE BURNER OF (B) AND MEANS FOR IGNITING SAME; (D) MEANS FOR FEEDING PRIMARY AIR TO SAID HEATING ANNULUS; (E) AN ELONGATED HOLLOW REFRACTORY PRIMARY BURNER BODY COAXIAL WITH SAID HOUSING IN THE DOWNSTREAM END THEREOF SPACED FROM THE BURNER BODY OF (B) TO PROVIDE A SUBSTANTIAL FREE GAS SPACE THEREBETWEEN AND FORMING AN AXIAL PRIMARY COMBUSTION CHAMBER; (F) A HOLLOW FUEL RING IN THE GAS SPACE OF (E) COAXIAL WITH SAID HOUSING HAVING ORIFICES THEREIN DIRECTED IN A CONICAL PATTERN DOWNSTREAM INTO THE PRIMARY COMBUSTION CHAMBER OF (E), SAID FREE GAS SPACE COMMUNICATING BETWEEN THE ANNULUS OF (B) AND SAID PRIMARY COMBUSTION CHAMBER TO PROVIDE FOR FLOW OF HEATED COMBUSTION AIR FROM SAID ANNULUS TO SAID PRIMARY COMBUSTION CHAMBER; AND (G) MEANS FOR FEEDING FLUID FUEL TO THE FUEL RING OF (F).
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Cited By (41)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3497308A (en) * 1968-07-22 1970-02-24 Charles S Flynn Air purifying apparatus and method
US3656878A (en) * 1970-03-26 1972-04-18 Exxon Research Engineering Co High luminosity burner
US3834864A (en) * 1972-03-29 1974-09-10 Koppers Gmbh Heinrich Regenerator construction
US3902840A (en) * 1972-03-16 1975-09-02 Participations Ind Comp D Et Dilution burner
US3910494A (en) * 1974-02-21 1975-10-07 Southwest Res Inst Valveless combustion apparatus
US3917442A (en) * 1971-11-10 1975-11-04 Dimiter S Zagoroff Heat gun
US4047877A (en) * 1976-07-26 1977-09-13 Engelhard Minerals & Chemicals Corporation Combustion method and apparatus
US4051231A (en) * 1974-09-23 1977-09-27 Ford, Bacon & Davis Texas, Inc. Production of internal atmospheres for kilns
DE2716460A1 (en) * 1976-04-16 1977-10-27 Gen Electric Universal burner
US4069020A (en) * 1974-09-23 1978-01-17 Ford, Bacon & Davis Texas Inc. Production of reducing gases
US4095928A (en) * 1977-02-14 1978-06-20 Southern California Edison Company Method of reducing nitrogen oxide emissions in flue gas
US4118171A (en) * 1976-12-22 1978-10-03 Engelhard Minerals & Chemicals Corporation Method for effecting sustained combustion of carbonaceous fuel
US4123220A (en) * 1976-03-31 1978-10-31 Ford, Bacon & Davis Texas, Inc. Gas mixer and reactor
US4154567A (en) * 1977-01-07 1979-05-15 Continental Carbon Company Method and apparatus for the combustion of waste gases
US4343247A (en) * 1980-06-30 1982-08-10 Aqua-Chem, Inc. Fluidized bed combustion method and apparatus
US4344372A (en) * 1980-06-30 1982-08-17 Aqua-Chem, Inc. Fluidized bed combustion device
US4375949A (en) * 1978-10-03 1983-03-08 Exxon Research And Engineering Co. Method of at least partially burning a hydrocarbon and/or carbonaceous fuel
US4382771A (en) * 1980-05-12 1983-05-10 Lola Mae Carr Gas and steam generator
US4395223A (en) * 1978-06-09 1983-07-26 Hitachi Shipbuilding & Engineering Co., Ltd. Multi-stage combustion method for inhibiting formation of nitrogen oxides
US4496306A (en) * 1978-06-09 1985-01-29 Hitachi Shipbuilding & Engineering Co., Ltd. Multi-stage combustion method for inhibiting formation of nitrogen oxides
US4505666A (en) * 1981-09-28 1985-03-19 John Zink Company Staged fuel and air for low NOx burner
US4526529A (en) * 1983-05-20 1985-07-02 Rhone-Poulenc Chimie De Base Clean combustion process/apparatus
US4708637A (en) * 1986-04-22 1987-11-24 Dutescu Cornel J Gaseous fuel reactor
US4721454A (en) * 1977-05-25 1988-01-26 Phillips Petroleum Company Method and apparatus for burning nitrogen-containing fuels
US4830604A (en) * 1987-05-01 1989-05-16 Donlee Technologies Inc. Jet burner and vaporizer method and apparatus
US4860695A (en) * 1987-05-01 1989-08-29 Donlee Technologies, Inc. Cyclone combustion apparatus
US4879959A (en) * 1987-11-10 1989-11-14 Donlee Technologies, Inc. Swirl combustion apparatus
US4900246A (en) * 1977-05-25 1990-02-13 Phillips Petroleum Company Apparatus for burning nitrogen-containing fuels
US4927349A (en) * 1977-05-25 1990-05-22 Phillips Petroleum Company Method for burning nitrogen-containing fuels
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
US5277578A (en) * 1992-12-08 1994-01-11 Gaz Metropolitain & Co., Ltd. And Ptnr. Gas burner having tangential counter-rotation air injectors and axial gas injector tube
US6129542A (en) * 1999-05-21 2000-10-10 Gas Research Institute Dual mode pilot burner
US6209355B1 (en) 1997-06-02 2001-04-03 Owens Corning Fiberglas Technology, Inc. Method for melting of glass batch materials
US6652265B2 (en) 2000-12-06 2003-11-25 North American Manufacturing Company Burner apparatus and method
US20050074711A1 (en) * 2002-02-28 2005-04-07 Cain Bruce E. Burner apparatus
US20070172785A1 (en) * 2006-01-24 2007-07-26 George Stephens Dual fuel gas-liquid burner
US20070172783A1 (en) * 2006-01-24 2007-07-26 George Stephens Dual fuel gas-liquid burner
US20070172784A1 (en) * 2006-01-24 2007-07-26 George Stephens Dual fuel gas-liquid burner
US20080081301A1 (en) * 2006-10-03 2008-04-03 Hannum Mark C Low NOx combustion
US20100119984A1 (en) * 2008-11-10 2010-05-13 Fox Allen G Abatement system
US20160223194A1 (en) * 2013-09-26 2016-08-04 Mitsubishi Heavy Industries, Ltd. Burner and coal upgrading plant

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2753925A (en) * 1951-07-05 1956-07-10 Sinclair Refining Co Carbon monoxide burner
US2918118A (en) * 1954-08-30 1959-12-22 Phillips Petroleum Co Burner
US2988887A (en) * 1956-09-26 1961-06-20 Milliken Humphreys Vaporizing oil burner
US3091446A (en) * 1962-02-19 1963-05-28 Union Carbide Corp Method for the heating of industrial furnaces
US3273621A (en) * 1966-09-20 Burner assembly

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3273621A (en) * 1966-09-20 Burner assembly
US2753925A (en) * 1951-07-05 1956-07-10 Sinclair Refining Co Carbon monoxide burner
US2918118A (en) * 1954-08-30 1959-12-22 Phillips Petroleum Co Burner
US2988887A (en) * 1956-09-26 1961-06-20 Milliken Humphreys Vaporizing oil burner
US3091446A (en) * 1962-02-19 1963-05-28 Union Carbide Corp Method for the heating of industrial furnaces

Cited By (51)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3497308A (en) * 1968-07-22 1970-02-24 Charles S Flynn Air purifying apparatus and method
US3656878A (en) * 1970-03-26 1972-04-18 Exxon Research Engineering Co High luminosity burner
US3917442A (en) * 1971-11-10 1975-11-04 Dimiter S Zagoroff Heat gun
US3902840A (en) * 1972-03-16 1975-09-02 Participations Ind Comp D Et Dilution burner
US3834864A (en) * 1972-03-29 1974-09-10 Koppers Gmbh Heinrich Regenerator construction
US3910494A (en) * 1974-02-21 1975-10-07 Southwest Res Inst Valveless combustion apparatus
US4069020A (en) * 1974-09-23 1978-01-17 Ford, Bacon & Davis Texas Inc. Production of reducing gases
US4051231A (en) * 1974-09-23 1977-09-27 Ford, Bacon & Davis Texas, Inc. Production of internal atmospheres for kilns
US4123220A (en) * 1976-03-31 1978-10-31 Ford, Bacon & Davis Texas, Inc. Gas mixer and reactor
JPS52138729A (en) * 1976-04-16 1977-11-19 Gen Electric Burner device
US4063872A (en) * 1976-04-16 1977-12-20 General Electric Company Universal burner
DE2716460A1 (en) * 1976-04-16 1977-10-27 Gen Electric Universal burner
JPS5828490B2 (en) * 1976-04-16 1983-06-16 Gen Electric
US4047877A (en) * 1976-07-26 1977-09-13 Engelhard Minerals & Chemicals Corporation Combustion method and apparatus
US4118171A (en) * 1976-12-22 1978-10-03 Engelhard Minerals & Chemicals Corporation Method for effecting sustained combustion of carbonaceous fuel
US4154567A (en) * 1977-01-07 1979-05-15 Continental Carbon Company Method and apparatus for the combustion of waste gases
US4095928A (en) * 1977-02-14 1978-06-20 Southern California Edison Company Method of reducing nitrogen oxide emissions in flue gas
US4900246A (en) * 1977-05-25 1990-02-13 Phillips Petroleum Company Apparatus for burning nitrogen-containing fuels
US4721454A (en) * 1977-05-25 1988-01-26 Phillips Petroleum Company Method and apparatus for burning nitrogen-containing fuels
US4927349A (en) * 1977-05-25 1990-05-22 Phillips Petroleum Company Method for burning nitrogen-containing fuels
US4395223A (en) * 1978-06-09 1983-07-26 Hitachi Shipbuilding & Engineering Co., Ltd. Multi-stage combustion method for inhibiting formation of nitrogen oxides
US4496306A (en) * 1978-06-09 1985-01-29 Hitachi Shipbuilding & Engineering Co., Ltd. Multi-stage combustion method for inhibiting formation of nitrogen oxides
US4375949A (en) * 1978-10-03 1983-03-08 Exxon Research And Engineering Co. Method of at least partially burning a hydrocarbon and/or carbonaceous fuel
US4382771A (en) * 1980-05-12 1983-05-10 Lola Mae Carr Gas and steam generator
US4343247A (en) * 1980-06-30 1982-08-10 Aqua-Chem, Inc. Fluidized bed combustion method and apparatus
US4344372A (en) * 1980-06-30 1982-08-17 Aqua-Chem, Inc. Fluidized bed combustion device
US4505666A (en) * 1981-09-28 1985-03-19 John Zink Company Staged fuel and air for low NOx burner
US4526529A (en) * 1983-05-20 1985-07-02 Rhone-Poulenc Chimie De Base Clean combustion process/apparatus
US4708637A (en) * 1986-04-22 1987-11-24 Dutescu Cornel J Gaseous fuel reactor
US4860695A (en) * 1987-05-01 1989-08-29 Donlee Technologies, Inc. Cyclone combustion apparatus
US4830604A (en) * 1987-05-01 1989-05-16 Donlee Technologies Inc. Jet burner and vaporizer method and apparatus
US4879959A (en) * 1987-11-10 1989-11-14 Donlee Technologies, Inc. Swirl combustion apparatus
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
US5277578A (en) * 1992-12-08 1994-01-11 Gaz Metropolitain & Co., Ltd. And Ptnr. Gas burner having tangential counter-rotation air injectors and axial gas injector tube
US6209355B1 (en) 1997-06-02 2001-04-03 Owens Corning Fiberglas Technology, Inc. Method for melting of glass batch materials
US6129542A (en) * 1999-05-21 2000-10-10 Gas Research Institute Dual mode pilot burner
US6652265B2 (en) 2000-12-06 2003-11-25 North American Manufacturing Company Burner apparatus and method
US6929469B2 (en) 2002-02-28 2005-08-16 North American Manufacturing Company Burner apparatus
US20050074711A1 (en) * 2002-02-28 2005-04-07 Cain Bruce E. Burner apparatus
US20070172785A1 (en) * 2006-01-24 2007-07-26 George Stephens Dual fuel gas-liquid burner
US20070172783A1 (en) * 2006-01-24 2007-07-26 George Stephens Dual fuel gas-liquid burner
US20070172784A1 (en) * 2006-01-24 2007-07-26 George Stephens Dual fuel gas-liquid burner
WO2007087020A1 (en) * 2006-01-24 2007-08-02 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
GB2449022A (en) * 2006-01-24 2008-11-05 Exxonmobil Chem Patents Inc Duel fuel gas-liquid burner
GB2449022B (en) * 2006-01-24 2010-04-28 Exxonmobil Chem Patents Inc Dual fuel gas-liquid burner
US7901204B2 (en) 2006-01-24 2011-03-08 Exxonmobil Chemical Patents Inc. Dual fuel gas-liquid burner
US7909601B2 (en) 2006-01-24 2011-03-22 Exxonmobil Chemical Patents Inc. Dual fuel gas-liquid burner
US20080081301A1 (en) * 2006-10-03 2008-04-03 Hannum Mark C Low NOx combustion
US20100119984A1 (en) * 2008-11-10 2010-05-13 Fox Allen G Abatement system
US20160223194A1 (en) * 2013-09-26 2016-08-04 Mitsubishi Heavy Industries, Ltd. Burner and coal upgrading plant

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