Combustion studies of rice husk in fluidized bed

The conventional method of paddy husk combustion in grate type furnaces is slow and inefficient yielding low combustion efficiency. Fluidized bed combustion of paddy husks was proved to be a feasible solution for efficient combustion along with high combustion intensity. In the present work combustion studies of rice husk were conducted in an atmospheric fluidized bed in high excess air environment and observed considerable reduction in CO levels in flue gases and unburnt carbon in residual ash. The combustion efficiency, temperature distribution in the reactor, ash characteristics etc. are also studied in fluidized bed at various operating conditions. Secondary air is introduced in the enlarged free board that provides high turbulence and more residence time for flue gases and unburnt particles in the reactor vessel.