Use of waste solids from fluidized bed combustion processes for additional flue gas desulfurization

Abstract From the Canadian patent

A process for obtaining additional flue gas desulfurization using waste solids from a fluidized bed combustion system in which sulfurous fuels are burned in a bed of acceptor particles. The process comprises the following steps: (1) withdrawing coarse waste particles from the fluidized bed combustion system; (2) subjecting the coarse waste particles to mechanical grinding means for attriting and disintegrating whereby the waste particles are reduced to a finely divided chemically reactive state; and, (3) injecting the finely divided waste particles into the fluidized bed combustion system whereby additional flue gas desulfurization is achieved.