摘要
使用自研的微颗粒实时在线监测仪对微颗粒在液相中的悬浮和沉降过程进行了在线定量测量研究。首先,通过与商用离线仪器Multisizer 4e的对比验证了自研的微颗粒监测仪实时、在线测量的可靠性。然后,选用了标准物质乳胶微球、Al2O3和ZrO2三种密度不同的百微米量级的微颗粒,对磁力搅拌器中稳定转速下的悬浮特性以及搅拌停止后颗粒的重力沉降过程进行实时在线观测,得到了这两种情形下测量点的颗粒浓度和粒度分布信息。实验结果表明,即使搅拌速度超过临界悬浮转速,搅拌容器中的Al2O3颗粒仍存在不同程度的非均匀分布状态,呈现出一定的浓度和粒度分布。在重力沉降的瞬变过程中,固体颗粒的粒径和密度在固液两相分离的过程中有着显著的作用。
The micro particles’suspension and sedimentation processes were quantitatively studied by using a self-developed micro particle real-time online analyzer. After verifying the accuracy and reliability of the self-developed micro particle analyzer, three micro particles of different densities, the latex particle reference material, Al2O3 and ZrO2, were selected to conduct experiments. Through monitoring the suspension and gravity sedimentation processes, the particles’concentration and granularity distribution information were then obtained. The results show that the Al2O3 particles exhibit non-uniform distribution state even under super-critical suspension speed. And the particles’granularity and density play a significant role in solid-liquor separation during the transient process of gravity deposition.
作者
李勇
刘飞
董海峰
张香平
陈靖容
刘仁材
金劭
吴战鹏
王晓东
LI Yong;LIU Fei;DONG Haifeng;ZHANG Xiangping;CHEN Jingrong;LIU Rencai;JIN Shao;WU Zhanpeng;WANG Xiaodong(College of Materials Science and Opto-Electronic Technology,University of Chinese Academy of Sciences,Beijing 100049,China;Faculty of Science,Beijing University of Chemical Technology,Beijing 100084,China;Key Laboratory of Green Process and Engineering,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China)
出处
《化工学报》
EI
CAS
CSCD
北大核心
2019年第A02期181-190,共10页
CIESC Journal
基金
中国科学院装备研制项目(YZ201567)：在线、原位、定量监测微颗粒的电磁探测仪的研制
中国科学院国际合作局国际大科学培育专项“液态阳光”能源体系计划项目(211211KYSB20180020)
关键词
粒度分布
颗粒过程
两相流
在线监测
电阻脉冲
particle size distribution
particulate processes
two-phase flow
online monitoring
resistance pulse
