空气重介质流化床的床层黏度研究  

Research on Viscosity of Air Dense Medium Fluidized Bed

作　　者：籍永华[1] 秦丙克[1] 赵跃民[2] 骆振福[2] 

机构地区：[1]六盘水师范学院化学与化学工程系,贵州六盘水553004 [2]中国矿业大学化工学院,江苏徐州221008

出　　处：《中国粉体技术》2014年第5期10-14,共5页China Powder Science and Technology

基　　金：贵州省六盘水市科技计划项目;编号:52020-2012-01-09-08;贵州省煤炭资源清洁高效利用科研实验平台项目;编号:黔科平台[2011]4003;贵州省教育厅特色重点实验室项目;编号:(2011):278

摘　　要：利用旋转法对空气重介质流化床的床层黏度进行研究,分析影响流化床床层黏度的因素,建立床层黏度与影响因素的数学模型。结果表明:流化床床层黏度随着加重质磁铁矿粉平均粒度的增大而增大,随着流化气速的增大而减小,随着床层高度及重介质水分含量的增大而增大;当煤粉质量分数大于12%时,床层黏度明显增大,煤粉质量分数为17%时,气-固两相流的流动性变差。The viscosity of air dense medium fluidized bed was measured by the method of rotation. The factors influencing the viscosity of fluidized bed were analyzed. The mathematical model between those factors and the viscosity was proposed. The results indicate that the bed viscosity increases with an increase in mean particle size, decreases with an increase in gas velocity, and increases with the increase of bed height and moisture content. When the mass fraction of coal powders is larger than 12%, the bed viscosity significantly increases. When the mass fraction of coal powders is 17%, the bed fluidization becomes poor.

关 键 词：空气重介质流化床 床层黏度 磁铁矿粉 

分 类 号：TQ021.1[化学工程] TD91[矿业工程—选矿]