Low NOX burner

Details Low NOX burner Low NOX burner

1979-04-02

1982-08-31

Scott, Samuel

Combustion

Fuel disperser installed in furnace

Plural feed means extending to common wall opening of furnace

431284, F23Q 900

Patent

active

043470521

ABSTRACT:
A fluid fuel burner system for minimum production of NOX under varying rates of fuel firing and varying rates of combustion air or oxidant supply, which comprises a fuel burner including means for burning liquid and gaseous fuel. Liquid fuels are burned in an axial burner tube, and the gaseous fuels are burned in a plurality of gas burner tubes located in a circle coaxial with the liquid burner. A first air or oxidant plenum supplies primary-plus-secondary air or oxidant, the primary air or oxidant going to the liquid burner and the secondary air or oxidant going to the gas burner. The total of primary plus secondary is less than stoichiometric flow so that the combustion of the fuel in a first combustion chamber provides a reducing atmosphere to preclude the formation of NOX. Means are provided for independently controlling the primary air or oxidant flow compared to the secondary air or oxidant flow, or vice versa. A second air or oxidant plenum provides tertiary air or oxidant to a second combustion space downstream of the first combustion chamber. Control means provide independent control of the primary-plus-secondary air or oxidant flow to the first plenum as a selected ratio to the tertiary air or oxidant, that flows to the second plenum.

REFERENCES:
patent: 2247768 (1941-07-01), Huwyler
patent: 2269333 (1942-01-01), Bloom
patent: 2672190 (1954-03-01), Schumann
patent: 2857961 (1958-10-01), Brown et al.
patent: 3822654 (1974-07-01), Ghelfi
patent: 3940234 (1976-02-01), Reed et al.
patent: 4004875 (1977-01-01), Zink et al.
patent: 4095929 (1978-06-01), McCartney
patent: 4144016 (1979-03-01), Takahashi et al.
patent: 4201538 (1980-05-01), Kopp
patent: 4257763 (1981-03-01), Reed

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