水分对流态化干法分选过程的影响研究  

Research on influence of water content in fluidized dry separation of coal

作　　者：朱学帅[1] 李大虎[1] 刘道春 张建超[1] 韩星[1] 马丹[1] 

机构地区：[1]中国矿业大学(北京)化学与环境工程学院,北京100083 [2]六盘水市能源局煤炭科,贵州六盘水553000

出　　处：《煤炭工程》2016年第1期122-125,共4页Coal Engineering

基　　金：国家科技支撑计划项目(2012BAA04B02);国家自然科学基金资助项目(51174214);高等学校博士学科点专项科研基金(20120023110017)

摘　　要：为提高流态化干法选煤对于潮湿煤炭分选的适应性,分析了煤炭表面水对于加重质的粘附行为,明确了煤炭表面水、加重质水分对流态化干法分选效果的影响,并采用流态化分选和分选干燥一体化的方式进行对比试验。结果表明:流态化干法分选干燥一体化方式可以对潮湿煤炭进行有效分选,在干燥温度50℃,分选时间2min,风量8m3/h的条件下分选较难选煤,表面水脱除率大于91.5%,可能偏差E值小于0.062g/cm3;随着煤炭表面水和加重质水分升高,可能偏差E值增大,分选效果变差,且加重质水分增加,床层压降波动幅度加大,起始流化速度增大。随粘附时间的增加,加重质粘附率先急剧增大,后增速减缓并达到最大,最后逐渐降低。To improve the adaptability of fluidized dry separation of wet coal, the adhesion behavior between coal surface water and dense medium was analyzed, and the influence of coal surface water and dense medium water for the dry coal separations was investigated. In the same time, the contrast tests were done by the integration device of separating and drying. The results showed that it was an effective approach to separate wet coal by the integration device. When wet coal was separated by fluidized bed at 50℃ for 2 min, under air volume of 8m3/h, surface water removal rate was 91.5%, and the E value was below 0. 062g/cm3. With the increasing of the coal water and dense medium water, the E value increased and the separation effect worsened. The bed pressure drop sharply fluctuated and the initial fluidization velocity improved with the increasing of dense medium water. The adhesion rate of dense medium increased rapidly and s｜owed down to reach the maximum, and then gradually decreased with as adhesion time kept increasing.

关 键 词：表面水 流态化干法分选 潮湿煤炭 分选干燥一体化 

分 类 号：TD94[矿业工程—选矿]