Apparatus for coal combustion

Details Apparatus for coal combustion Apparatus for coal combustion

1984-06-04

1985-10-08

Favors, Edward G.

Furnaces

Utilizing powdered fuel

Having rotary flow means

110263, 110347, F23D 102

Patent

active

045453071

ABSTRACT:
A coal combustion apparatus capable of improving NO.sub.x reduction to a large extent is provided, which apparatus comprises a pulverized coal-feeding pipe (abbreviated to coal pipe) inserted into a burner throat on the lateral wall of a combustion furnace and for feeding the coal and air into the furnace; a means for feeding the coal and air into the coal pipe; a secondary air passageway formed between the coal pipe and a secondary air-feeding pipe provided on the outer peripheral side of the coal pipe; a ternary air passageway formed on the outer peripheral side of the secondary air-feeding pipe; a means for feeding air or an oxygen-containing gas into the secondary air passageway and that into the ternary air passageway; and a bluff body having a cross-section of a L-letter form provided at the tip end of the coal pipe.

REFERENCES:
patent: 3788796 (1974-01-01), Krippene et al.
patent: 4147116 (1979-04-01), Graybill
patent: 4223615 (1980-09-01), Breen et al.
patent: 4422389 (1983-12-01), Schroder

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