Combustion system for a coal-fired furnace having an air nozzle for discharging air along the inner surface of a furnace wall

摘要

A combustion system in which a coal/primary air mixture is discharged from burners located in the corners of the furnace towards an imaginary circle disposed in the center of the furnace. Air is discharged from air nozzles also located in the corners of the furnace in two flow streams-- one directed towards the center of the furnace in a combustion- supporting relation to the fuel, and the other along the inner surfaces of the furnace boundary walls to maintain an oxidizing atmosphere and minimize corrosion and slagging.