Process and equipment for producing solid fuel by using coal as raw material

摘要

The invention provides a process for producing a solid fuel exhibiting lowered spontaneous ignitability and excellent transportability and storage properties from low grade coal through dehydration, which brings about reduction in the quantity of heavy oil component used; and equipment therefor. A process for producing solid fuel which comprises mixing low grade coal with an oil containing a solvent oil component to prepare a raw material slurry and subjecting the slurry to water evaporation treatment and then solid-liquid separation, characterized in that a heavy oil component is added to the slurry either after the completion of the water evaporation treatment or in the course of the water evaporation treatment; and equipment for the production of solid fuel which is equipped with a mixing tank (1) for mixing low grade coal with an oil containing a solvent oil component to prepare a raw material slurry, evaporators (2, 3) for conducting the water evaporation treatment of the slurry, and a means for conducting the solid-liquid separation of the resulting slurry, characterized by being further equipped with a means for adding a heavy oil component either to the slurry after the completion of the water evaporation treatment or in the course of the water evaporation treatment.