Integrated low NO.sub.x tangential firing system

Details Integrated low NO.sub.x tangential firing system Integrated low NO.sub.x tangential firing system

1993-05-13

1994-05-31

Favors, Edward G.

Furnaces

Utilizing powdered fuel

Having rotary flow means

110232, 110347, 431173, F23D 102

Patent

active

053159390

ABSTRACT:
An integrated low NO.sub.x tangential firing system (12) that is particularly suited for use with pulverized solid fuel-fired furnaces (10), and a method of operating a pulverized solid fuel-fired furnace (10) equipped with an integrated low NO.sub.x tangential firing system (12). The integrated low NO.sub.x tangential firing system (12) when so employed with a pulverized solid fuel-fired furnace (10) is capable of limiting NO.sub.x emissions therefrom to less than 0.15 lb./10.sup. 6 BTU, while yet maintaining carbon-in-flyash to less than 5% and CO emissions to less than 50 ppm. The integrated low NO.sub.x tangential firing system (12) includes pulverized solid fuel supply means (62), flame attachment pulverized solid fuel nozzle tips (60), concentric firing nozzles, close-coupled overfire air (98,100), and multi-staged separate overfire air (104,106).

REFERENCES:
patent: 4419941 (1983-12-01), Samtalla
patent: 4715301 (1987-12-01), Bianca et al.
patent: 5205226 (1993-04-01), Kitto, Jr. et al.

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