FLUIDIZED BED DRYING HEATING CLASSIFICATION DEVICE AND PRETREATMENT METHOD OF COAL FOR COKE MAKING FOR COKE OVEN

摘要

PROBLEM TO BE SOLVED: To easily convert pulverized coal to blocks without declining heat efficiency and productivity etc. of entire pretreatment of coal for coke making by reducing the temperature of the pulverized coal while keeping the temperature of coarse coal high, in a pretreatment method of the coal for coke making charged to a coke oven and a fluidized bed drying heating classification device to perform the method.;SOLUTION: In the fluidized bed drying heating classification device, in a fluidized bed in which coal for coke making supplied from a coal supply part is fluidized by hot air supplied from the device lower side, while the coal for coke making is made to flow and moved to a coal discharge part, the coal for coke making is dried and heated, and coarse coal and pulverized coal in the heated coal for coke making are classified. The fluidized bed is divided into a front step part and a rear step part along the longitudinal direction from the coal supply part to the coal discharge part. The pulverized coal discharged from each of the front step part and the rear step part is collected separately, and the pulverized coal collected on the rear step side is supplied to the front step side.;COPYRIGHT: (C)2011,JPO&INPIT