Pulverized fuel burner

Details Pulverized fuel burner Pulverized fuel burner

1988-08-01

1989-09-05

Favors, Edward G.

Furnaces

Utilizing powdered fuel

Having rotary flow means

110263, 110347, 431263, F23D 102

Patent

active

048628140

ABSTRACT:
A burner which is suitable for use in combusting pulverized coal and which can be used as an igniter for igniting the main burners in steam raising plant. The burner has an electrically powered torch which generates a continuous plasma which extends into a devolatilization zone of the burner, and primary conduits are provided for directing a primary supply of dense phase pulverized coal into the devolatilization zone. The burner is constructed also to include a combustion zone which surrounds the devolatilization zone. The burner is constructed also to include a comubstion zone which surrounds the devolatilization zone, and secondary conduits are provided for directing a secondary supply of pulverized coal into the combustion zone along with a supply of combustion supporting air. In operation of the burner the secondary supply of pulverized coal is entrained in the air and is carried into the combustion zone by way of a swirl device and, once in the combustion zone, the coal-air mixture is contacted by partially combusted volatiles and carbon particles that move radially outward from the devolatilization zone.

REFERENCES:
patent: 4279206 (1981-07-01), Pitts et al.
patent: 4438707 (1984-03-01), Delaplace et al.
patent: 4474120 (1984-10-01), Adrian et al.

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