Step-diffuser for overfire air and overfire air/N-agent...

Details Step-diffuser for overfire air and overfire air/N-agent... Step-diffuser for overfire air and overfire air/N-agent...

2005-03-15

2005-03-15

Rinehart, Kenneth (Department: 3749)

Furnaces

Process

Treating fuel constituent or combustion product

C110S214000, C110S265000, C110S203000, C431S181000, C431S348000

Reexamination Certificate

active

06865994

ABSTRACT:
An overfire air injector for use in a fossil fuel-fired combustion device includes a cylindrical nozzle having an outlet end formed with a step diffuser comprising one or more radial steps that enlarge the outlet end of the nozzle. An atomizer lance may be mounted within the nozzle, having a discharge orifice at the outlet end of the nozzle, for supplying a reducing agent to the overfire air to reduce NOx emissions.

REFERENCES:
patent: 851346 (1907-04-01), Darling
patent: 3219094 (1965-11-01), Lempa
patent: 3315726 (1967-04-01), Williams
patent: 4416620 (1983-11-01), Morck
patent: 5139755 (1992-08-01), Seeker et al.
patent: 5756059 (1998-05-01), Zamansky et al.
patent: 6101957 (2000-08-01), Wilson et al.
patent: 6280695 (2001-08-01), Lissianski et al.
patent: 0253324 (1988-01-01), None
patent: 2004052 (1979-03-01), None

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