METHOD AND APPARATUS FOR TREATING COAL

摘要

A process for treating coal with a high sulphur content to reduce sulphur dioxide emissions from coal combustion, including crushing the coal; rotating the coal in a pressure container; reducing atmospheric pressure inside the pressure container to further fracture the coal by withdrawing fluids; removing ambient gases from fracture planes, pores and crevices of the coal; contacting the coal with aqueous colloid composition with a calcium compound; rotating the pressure container to allow the aqueous colloid composition to permeate the pores, fracture planes and crevices of the coal; pressurizing the aqueous composition-treated coal in the presence of carbon dioxide for the calcium compound to crystallize in the pores, fracture planes and crevices of the crushed coal to further fracture the coal; and allowing the calcium compound to permeate the fractures created by the crystallization of the calcium compound.