Wurster 流化床内颗粒流动特性实验研究  

Experimental Study of the Gas-solid Flow in a Wurster Fluidized Bed

作　　者：车汉桥 吴蒙[1,2] 叶佳敏[1] 王海刚[1,2] 

机构地区：[1]中国科学院工程热物理研究所,北京100190 [2]中国科学院大学,北京100049

出　　处：《工程热物理学报》2017年第3期548-552,共5页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.61320106004;No.61374018)

摘　　要：为研究Wurster流化床内颗粒流动规律,本文利用12-4-8组合电极电容层析成像(Electrical Capacitance Tomography,ECT)传感器对Wurster流化床冷态实验和加湿实验过程进行监测,得到了ECT重构图像以及颗粒浓度时变曲线。首先,根据冷态实验数据比较了不同操作条件下流化床内颗粒流态和浓度波动特性;在此基础上,通过加湿实验数据分析了包衣液流率对于颗粒流动的影响。本文研究表明,ECT传感器适用于Wurster流化床过程关键参数在线测量和故障诊断,从而为反应过程的优化提供支持。To investigate the flow behavior in a Wurster fluidized bed and optimize the coating process,one set of 12-4-8 combined electrical capacitance tomography（ECT） sensor was used to monitor the cold flow and wetting process in a Wurster fluidized bed,ECT images and solid concentration curves were obtained based on the measurement results.Firstly,the solid flow regime and concentration fluctuation with different operation parameters were compared based on the cold test.Secondly,the effect of solution flow rate on the gas-solid flow was analyzed based on the wetting test.Finally,an optimized strategy for the process control of coating process was discussed based on experiment results.

关 键 词：Wurster 流化床 电容层析成像 颗粒浓度 

分 类 号：TM934.2[电气工程—电力电子与电力传动]