Experimental investigation on secondary air jet penetration depth in the dense zone of a circulating fluidized bed

摘要

The secondary air jet penetration depth of dense zone is measured in a 0.25mx0.25mx6.07m circulating fluidized bed. The influence of gas velocities (Uo),no zzle diameters,jet velocities,nozzle angel and the solids inventory is studied.A modified empirical correlation for calculating the secondary air jet penetration depth in the dense zone is developed.SA jet penetration depth increases with the increase of jet velocity.With the same flow rate,jet penetration depth becomes smaller as the diameter increases.Horizontal jet has the maximum jet penetration depth. The increasing of gas velocities,nozzle angel and solids inventory will reduce the jet penetration depth.