Combustion – Combustion products return structure – Recirculation about mixing or combustion chamber wall or baffle
Reexamination Certificate
2003-08-13
2008-09-30
McAllister, Steven B. (Department: 3749)
Combustion
Combustion products return structure
Recirculation about mixing or combustion chamber wall or baffle
C431S215000, C431S181000
Reexamination Certificate
active
07429173
ABSTRACT:
A gas burner for use in a furnace and a method of burning gas in a furnace, especially but not exclusively a process furnace used in an oil cracking or refining process. The gas burner comprises two passageways with adjacent outlets. The first passage way is in fluid communication with a source of pressurised fuel gas and has an aperture through which recirculated flue gas can enter the first passageway and the second passageway is in fluid communication with a source of air. In operation, fuel gas is injected into the first passageway and recirculated flue gas is thereby drawn into the first passageway so that it mixes with the fuel gas. Fuel gas is partially combusted and a mixture of partially combusted fuel gas and recirculated flue gas flows up the first passageway and comes into contact with air from the second passageway and combusts. The use of recirculated flue gas keeps down the level of NOx emissions and as the recirculated flue gas is sucked into the first passageway by the pressurised fuel gas flow it is not necessary to provide complex pumping mechanisms.
REFERENCES:
patent: 1995003 (1935-03-01), MacKenzie et al.
patent: 3097686 (1963-07-01), Morrow
patent: 3146821 (1964-09-01), Wuetig
patent: 4445842 (1984-05-01), Syska
patent: 4645449 (1987-02-01), Schwartz et al.
patent: 4708638 (1987-11-01), Brazier et al.
patent: 4995807 (1991-02-01), Rampley et al.
patent: 5073105 (1991-12-01), Martin et al.
patent: 5129818 (1992-07-01), Balsiger
patent: 5263849 (1993-11-01), Irwin et al.
patent: 5735683 (1998-04-01), Muschelknautz
patent: 6039560 (2000-03-01), Kubota
patent: 6846175 (2005-01-01), Spicer
patent: 19738055 (1998-04-01), None
patent: 1 167 878 (2002-01-01), None
patent: WO93/07420 (1993-04-01), None
Foster Brian
Lanary Roger
Hamworthy Combustion Engineering Limited
Hunt, Jr. Ross F.
McAllister Steven B.
Stites & Harbison PLLC
Suereth Sarah
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