Pulverised fuel burner

Details Pulverised fuel burner Pulverised fuel burner

F - Mech Eng,Light,Heat,Weapons

23

D

110/24

F23D 1/00 (2006.01)

Patent

CA 1303429

ABSTRACT OF THE DISCLOSURE A burner which is suitable for use in combusting pulverised 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 expands into a devolatilisation zone of the burner, and primary conduits are provided for directing a primary supply of dense phase pulverised coal into the devolatilisation zone. The burner is constructed also to include a combustion zone which surrounds the devolatilisation zone, and secondary conduits are provided for directing a secondary supply of pulverised coal into the combustion zone along with a supply of combustion supporting air. In operation of the burner the secondary supply of pulverised 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 devolatilisation zone.

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