| 摘要 |
PROBLEM TO BE SOLVED: To provide a low grade coal drying apparatus in which the energy consumption for drying low grade coal is suppressed by using a waste heat source etc., which is originally less usable, to improve the efficiency of high energy of an entire low grade coal utilization system.SOLUTION: The low grade coal drying apparatus 1 includes, in a decompression vessel 5; a condenser 7 which uses a cold source such as a seawater that exists in the surrounding environment as a refrigerant; a vacuum pump 15 that decompresses in the decompression vessel 5 and sucks a non-condensable gas; a heating medium pipe which uses the low-temperature waste heat source of less than 100°C of a coal burning thermal power plant as a heat source; and a drying rotating drum 3 which is heated by the heating medium pipe and stirs the supplied coal to dry. |
