云南褐煤的脱水实验研究

采用热风干燥法和微波脱水法对小龙潭褐煤进行干燥脱水实验,并模拟南方空气湿度条件对干燥脱水后褐煤的水分回吸进行了实验研究.结果表明:温度和时间是影响热风干燥脱水效率的主要因素,干燥脱水效率随着干燥温度的升高和干燥时间的延长而提高,但当干燥温度大于等于160℃,干燥时间为25min时,继续延长干燥时间,干燥脱水效率提高不明显,微波有效输出功率和脱水时间是影响微波脱水效率的主要因素,褐煤粒径对热风干燥的影响比微波脱水大,褐煤干燥脱水的理想目标值为15%左右.

Experimental study of dehydration of brown coal in Yunnan Province

By using hot air dehydration and microwave dehydration,the dehydration experiment of Xiaolongtan brown coal investigated the moisture absorption of dried brown coal under the simulative air humidity condition on the Southern part of China.The experimental results showed that the hot air dehydration efficiency depended mainly on drying temperature and time.The dehydration efficiency rose with the increasing of the drying temperature and time.However,when the drying temperature was 160 ℃ or higher and drying time was 25 min,the drying dehydration efficiency was not obviously increased by extending the drying time.In addition,the microwave dehydration efficiency could also be influenced by the effective microwave output power and dehydration time.The influence of brown coal sample size on the hot air dehydration was larger than that of microwave dehydration.The ideal dehydration target of brown coal was about 15%.