Simulation and Experimental Analysis of Tangential Over Fire Air System of an Industrial Boiler

Abstract

The tangential over fire air system is a unique firing technique used in modern boilers. The combustion technique has been successfully used for bagasse combustion in cogeneration plants. In these boilers the fuel particles are accelerated by the distributor air jets to enter the furnace chamber. As the particles enter the combustion chamber, they are further subjected to under grate air and tangential over fire air, which helps in rapid mixing of the fuel with air.  The present study provides numerical and experimental investigations made on an industrial biomass fired furnace with tangential firing system. The effect of tangential over fire air system on combustion of bagasse across the tangential plane is well predicted and compared with good agreement with the measurements made at tangential plane.