METHOD FOR BURNING COAL USING OXYGEN IN A RECYCLED FLUE GAS STREAM FOR CARBON DIOXIDE CAPTURE

摘要

A method of introducing oxygen into a boiler system for combustion with a prepared fuel in a furnace combustion chamber comprises providing a plurali ty of swirl-inducing elements to the air stream delivery lines, and a plural ity of oxygen delivery jets adjacent the intake region and substantially sur rounding the air stream delivery lines; igniting the fuel gas to create a fl ame; and delivering a stream of oxygen through the jets tangentially to the flame envelope to substantially shape and stabilize a swirling flow field fo r the flame, the oxygen concentration in the flame envelope gradually increa sing towards an outer periphery of the flame envelope. A boiler system for u sing the method can be a new system or a retrofit to an existing system. The method and system provide advantages in reduced environmental impact and in creased efficiency while addressing the safety factors involved in introduci ng oxygen to boiler systems.