Procedure for the continuous drying of solid granular materials and apparatus for the realization of this procedure. (Machine-translation by Google Translate, not legally binding)

摘要

A process for the continuous drying of solid granular materials, characterized by the operations of mixing the solid material with a liquid immiscible with the impregnating liquid and capable of forming an azeotropic mixture with said impregnating liquid; introducing said mixture into a heated helical screw rotary conveyor, so that the material is moved through the different thread passages constituting said screw conveyor; to distill with reflux in a first zone of the helical screw conveyor until most of the amount of impregnating liquid is extracted as an azeotropic mixture; then distilled without reflux in a second zone of the screw conveyor, the impregnating liquid and the excess solvent; and, finally, of drying the solid material in a last zone of the screw conveyor to completely remove the immiscible solvent. (Machine-translation by Google Translate, not legally binding)