Direct ignition of a fluctuating fuel stream

Details Direct ignition of a fluctuating fuel stream Direct ignition of a fluctuating fuel stream

1978-05-16

1980-09-09

Favors, Edward G.

Furnaces

Utilizing powdered fuel

Having secondary air mixing means

110347, 110263, 431 1, F23C 1100, F23D 100

Patent

active

042211743

ABSTRACT:
A method of direct ignition of pulverized coal to furnish energy for warm-up or low load operation of a coal burning furnace comprises forming a fuel stream consisting of a mixture of pulverized coal and air, the fuel stream having an air to coal ratio and/or a flow velocity which fluctuates. The fluctuating fluid stream is introduced into a combustion area where the coal is ignited by an energy source. The fluctuation of the air to coal ratio and/or the fluctuation of the flow speed provide for the air to coal ratio and/or the flow speed to be swept through a range of values which includes the optimum conditions for ignition.

REFERENCES:
patent: 2945459 (1960-07-01), Junkermann
patent: 3250236 (1966-05-01), Zelinski
patent: 3606867 (1971-09-01), Briffa
patent: 3738290 (1973-06-01), Belter

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