Particle Measurement Sensor for in situ determination of phase structure of fluidized bed

作     者：Qiang Zhang Cang Huang Dong Jiang Xiaobo Wei Zhen Qian Fei Wei 

作者机构：Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical Engineering Tsinghua University Beijing 100084 China 

出 版 物：《Particuology》 (颗粒学报（英文版）)

年 卷 期：2009年第7卷第3期

页      面：175-182页

核心收录：

学科分类：080706[工学-化工过程机械] 0817[工学-化学工程与技术] 08[工学] 0807[工学-动力工程及工程热物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 082301[工学-道路与铁道工程] 0823[工学-交通运输工程] 

基　　金：supported by the Foundation for Natural Scientific Foundation of China (No. 20606020  No. 20736004  No. 20736007) 

主　　题：Particle Measurement Sensor Fluidized bed Acceleration Gas solid two phase flow Phase structure 

摘      要：Based on three-dimensional （3D） acceleration sensing, an intelligent particle spy capable of detecting, transferring, and storing data, is proposed under the name of Particle Measurement Sensor （PMS）. A prototype 60-mm-dia PMS was tested to track its freefall in terms of velocity and displacement, and served as a particle spy in a fluidized bed delivering the in situ acceleration information it detects. With increasing superficial gas velocity in the fluidized bed, the acceleration felt by PMS was observed to increase. The variance of the signals, which reflect the fluctuation, increased at first, reaching a maximum at the gas velocity （Uc） which marks the transition from bubbling to turbulent fluidization. Through probability density distribution （PDD） analysis, the PDD peak can be divided into the emulsion phase peak and the bubble phase peak. The average acceleration of emulsion and bubble phase increased, while the variance of both phases reached a maximum at Uc, at the same time. However, the difference between the variances of two phases reached the maximum at Uc. Findings of this study indicate that PMS can record independent in situ information. Further, it can provide other in situ measurements when equipped with additional multi-functional sensors.