本发明公开了一种煤调湿工艺余热利用方法及其装置，该方法包括以下步骤：1)利用低压蒸汽与湿煤换热后闪蒸得到饱和冷凝水；2)将步骤1)得到的饱和冷凝水用于对步骤1)得到的调湿煤进一步干燥预热，干燥预热时抽真空至-0.035～-0.06MPa；3)当调湿煤温度加热到65～70℃时，停止抽真空；4)待调湿煤温度升至80～90℃时，继续抽真空，待温度高于94℃时，停止抽真空，完成当前批调湿煤的干燥预热；5)循环重复步骤1)～4)，进行下一批调湿煤的干燥预热。本方法即装置将调湿后的饱和冷凝水直接引入中间储仓，对储仓内的调湿煤进一步预热干燥，大幅提高了饱和冷凝水的热效率，减少了焦炉炼焦过程能耗。

The invention discloses a waste heat utilization method and a device of a coal humidity control process. The method comprises the following steps: 1) using low-pressure steam to flash after heat exchange with wet coal to obtain saturated condensate; 2) The saturated condensate obtained in step 1) is used to further dry and preheat the humidified coal obtained in step 1), and vacuum to -0.035～-0.06MPa； 3) Stop vacuumizing when the temperature of moisture regulating coal is heated to 65 ~ 70 ℃; 4) When the temperature of the humidified coal rises to 80 ~ 90 ℃, continue vacuumizing. When the temperature is higher than 94 ℃, stop vacuumizing and complete the drying and preheating of the current batch of humidified coal; 5) Repeat steps 1) to 4) for drying and preheating of the next batch of humidified coal. In this method, the saturated condensate after humidification is directly introduced into the intermediate storage bin, and the humidified coal in the storage bin is further preheated and dried, which greatly improves the thermal efficiency of saturated condensate and reduces the energy consumption in the coking process of coke oven.