SOLID FUEL MANUFACTURING METHOD AND MANUFACTURING DEVICE

摘要

A drying step is executed in a stable state regardless of the increase or decrease in the conveyance amount of porous coal. A disclosed method includes: a mixing step of mixing porous coal with a mixture oil containing solvent oil and heavy oil, to obtain material slurry; an evaporation step of heating the material slurry to promote dehydration of porous coal and impregnating the mixture oil into pores of porous coal, to obtain dehydrated slurry; a solid-liquid separation step of separating upgraded porous coal and the mixture oil from the dehydrated slurry; and the drying step of drying the upgraded porous coal by heating and conveying it while supplying carrier gas. The method includes: setting a target value of the circulation amount of carrier gas and a target value of the pressure of carrier gas at the drying step; calculating control outputs, based on deviations between the target values and measured values corresponding respectively thereto; and adjusting the supply amount of carrier gas, based on a smaller value between the control outputs obtained.