Combustion system for a black liquor recovery boiler

Details Combustion system for a black liquor recovery boiler Combustion system for a black liquor recovery boiler

D - Textiles, Paper

21

C

D21C 11/12 (2006.01) F22B 31/04 (2006.01) F23C 5/00 (2006.01) F23C 7/02 (2006.01) F23G 7/04 (2006.01)

Patent

CA 2184875

A kraft recovery boiler furnace comprising a furnace chamber having four walls, a plurality of black liquor injection guns on at least two of the walls of the furnace chamber for injecting droplets of black liquor into the furnace, a plurality of primary air injection ports located at a lower elevation in the walls of said furnace, an injection site combustion zone surrounding the black liquor injection guns, a plurality of quaternary air injection ports located in the walls of said furnace in or above the injection site combustion zone such that air injected through the quaternary air injection ports is introduced into the injection site combustion zone and reacts with gaseous fuel released from the black liquor without substantially entraining the solid fuel from the black liquor.

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