GAS CLEANUP SYSTEMS FOR FLUIDISED-BED COAL COMBUSTORS.

In recent years, gas cleanup systems consisting of a number of cyclones, cyclones in conjunction with another device such as a fabric filter, granular bed, or electrostatic precipitator, have been used to remove particulates from the high temperature gas stream leaving fluidized bed coat combustors at both low and high pressure. These studies are reviewed to infer the relative success of each type of cleanup system from the perspective of cleanup requirements for expansion of the gas through a gas turbine and additionally from the perspective of emission standards established by the Environmental Protection Agency.