FLUIDIZED BED HEAT EXCHANGER

摘要

A fluidized bed heat exchanger is described in which a perforate support plate (20) bears relatively lightweight absorbent material particles and relatively heavy fuel ash particles in a fluidized bed (18). The heat exchanger includes a drain (42) through which a flow of air is forced upwardly into the bed (18). The air flow is controlled such that it forms an air screen which retains the adsorbent material particles in the bed (18) but allows the fuel ash particles to fall into the drain (43) for discharge.