次烟煤低温干燥特性的实验研究  

Experimental study on low-temperature drying characteristics of subbituminous coal

作　　者：白璞[1] 许诚[1] 徐钢[1] 马英[1] 董伟[1] 郭岩 

机构地区：[1]华北电力大学国家火力发电工程技术研究中心,北京102206 [2]通辽霍林河坑口发电有限责任公司,内蒙古通辽029200

出　　处：《煤炭工程》2016年第8期114-116,共3页Coal Engineering

基　　金：国家重点基础研究发展计划(973)项目(2015CB251504);国家自然科学基金重点项目(U1261210)

摘　　要：通过对次烟煤进行低温干燥实验,研究了干燥温度对煤粉干燥、复吸、破碎特性的影响。结果表明,50~100℃的低温干燥即可使其大部分水分以较快的速度蒸发,且干燥温度越高,干燥速率越快,平衡水分越低;低温干燥后,煤粉复吸不明显,但会随着干燥温度的增加而略有增加;干燥之后,煤粉的平均粒径小幅度下降,跟干燥温度无明显关系。Effect of drying temperature on sub-bituminous coal drying, re-absorption and crushing characteristics is investigated with low-temperature drying experiment. The results show that, moisture evaporate at a rapid speed in low temperature drying at 50- 100~C ; the higher the drying temperature, the faster drying rate and the lower the equilibrium moisture; after low-temperature drying, the re-absorption effect of pulverized coal is not obvious, which is slightly improved with the increase of drying temperature; the average particle size of pulverized coal decreases slightly and shows no obvious relation with the drying temperature.

关 键 词：次烟煤 低温干燥 复吸 破碎 

分 类 号：TQ533[化学工程—煤化学工程]