Determining axial dispersion coefficients of pilot-scale annular pulsed disc and doughnut columns

作     者：Xiong Yu Han Zhou Qiang Zheng Shan Jing Wenjie Lan Shaowei Li Xiong Yu;Han Zhou;Qiang Zheng;Shan Jing;Wenjie Lan;Shaowei Li

作者机构：Institute of Nuclear and New Energy TechnologyTsinghua UniversityBeijing 100084China State Key Laboratory of Heavy Oil ProcessingChina University of Petroleum(Beijing)Beijing 102249China State Key Laboratory of Chemical EngineeringTsinghua UniversityBeijing 100084China 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2020年第28卷第6期

页      面：1504-1513页

核心收录：

学科分类：0710[理学-生物学] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 080704[工学-流体机械及工程] 0817[工学-化学工程与技术] 080103[工学-流体力学] 08[工学] 0807[工学-动力工程及工程热物理] 0703[理学-化学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：support of the National Natural Science Foundation of China(21776151 and 21576147)for this investigation 

主　　题：Axial dispersion Computational fluid dynamics Residence time distribution Annular-pulsed disc and doughnut column 

摘      要：In this study,a computational fluid dynamics(CFD)method was adopted to calculate axial dispersion coefficients of annular pulsed disc and doughnut columns(APDDCs).Passive tracer was uniformly injected by pulse input at the continuous phase inlet,and its concentration governing equation was solved in liquid–liquidtwo-phase flow *** residence time distributions(RTDs)were obtained using the surface monitoring *** adopted RTD–CFD method was verified by comparing the axial dispersion coefficient between simulation and experimental results in the ***,in pilot-scale APDDCs,the axial dispersion coefficients predicted by the CFD–RTD method were approximately three times larger than experimental results determined by the steady-state concentration profile *** experimental method was demonstrated to be insensitive to the variation of the axial dispersion *** CFD–RTD method was more recommended to determine the axial dispersion *** was found that the axial dispersion coefficient increased with an increase in pulsation intensity,column diameter,and plate spacing,but was little affected by the throughput.