Low NOx burner

Details Low NOx burner Low NOx burner

1987-05-26

1990-03-13

Dority, Carroll B.

Combustion

Fuel disperser installed in furnace

Spaced fuel dispersing orifices within furnace

431183, 431284, 431351, 110262, 239404, 239406, F23C 500

Patent

active

049079620

ABSTRACT:
A low NOx burner comprises a pulverized coal nozzle for injecting a flow of a mixture of pulverized coal with primary air, a secondary air nozzle arranged externally of and coaxially with the pulverized coal nozzle, a tertiary air nozzle arranged externally of the secondary air nozzle and disposed coaxially with the pulverized coal nozzle, and a swirl flow generator for injecting secondary air and tertiary air as a respective swirl flow. Between the secondary air nozzle and the tertiary air nozzle, there is provided a spacer having such a thickness as to delay the mixing of the secondary air and the tertiary air and to form a swirl flow between the secondary air and the tertiary air.

REFERENCES:
patent: 3746499 (1973-07-01), Guerre et al.
patent: 4381718 (1983-05-01), Carver et al.
patent: 4412810 (1983-11-01), Izuha et al.
patent: 4474120 (1984-10-01), Adrian et al.
patent: 4620571 (1986-07-01), Chadshay
European Patent Application No. 128,085, Buckland, 12-1984, 11 pages.

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