Tangential firing system

Details Tangential firing system Tangential firing system

1979-07-12

1981-10-13

Yuen, Henry C.

Furnaces

Process

Burning pulverized fuel

431173, 110265, F23D 100

Patent

active

042941784

ABSTRACT:
A furnace in which fuel, such as pulverized coal, is burned, with the fuel and air being introduced into the furnace through tangential burners located in each of the four corners thereof and being directed tangentially to an imaginary circle in the center of the furnace. The invention will be described with pulverized coal, but is not limited to coal. Combustion gases from downstream of the furnace are recirculated back to the furnace, and are also introduced into the furnace from the four corners, in a tangential manner. The coal is introduced along with primary air to be directed at the smallest of a series of concentric imaginary circles; the recirculated gases are directed tangentially at a somewhat larger imaginary circle; and the secondary air is directed tangentially at a still larger imaginary circle.

REFERENCES:
patent: 2808011 (1957-10-01), Miller et al.
patent: 2867182 (1959-01-01), Crites
patent: 2979000 (1961-04-01), Sifrin et al.
patent: 3136536 (1964-06-01), Heinmann
patent: 3356075 (1967-12-01), Livingston
patent: 3597141 (1971-08-01), Fracke
patent: 3688747 (1972-09-01), Connell
patent: 3865054 (1975-02-01), Monroe, Jr.
patent: 3887326 (1975-06-01), Tounley
patent: 4150631 (1979-04-01), Frey et al.
patent: 4159000 (1979-06-01), Iwasaki et al.

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