The crushed coal is fed into the cyclone burner and fired with high rates of heat release. Before the hot gases enter in the boiler furnace the combustion of coal is completed. The crushed coal is fed into cyclone burners. The coal is Burned by centrifugal action which is imparted by the primary air which enters tangentially and secondary Air which also enters in the top tangentially at high speed and tertiary air is admitted in the centre.
