CFD simulation study of the effect of baffles on the fluidized bed for hydrogenation of silicon tetrachloride  

作　　者：Ning Liu Xingping Liu Fumin Wang Feng Xin Mingshuai Sun Yi Zhai Xubin Zhang 

机构地区：[1]School of Chemical Engineering and Technology,Tianjin University,Tianjin 300350,China [2]Xinte Energy Co.,Ltd.,Urumchi,Xinjiang 830011,China

出　　处：《Chinese Journal of Chemical Engineering》2022年第5期219-228,共10页中国化学工程学报（英文版）

基　　金：supported by the National Key Research and Development Program of China(2018YFB0604900);the National Natural Science Foundation of China(21978198);the National Key Research and Development Program of China(2016YFF0102503)。

摘　　要：In this study,the effect of channel baffles and louver baffles on the flow pattern in the large-scale industrial fluidized beds was studied by computational fluid dynamics(CFD)methods.Then,the effect of flow pattern on the chemical reaction performance was studied for the first time.Simulation results showed that the gas velocity distributed more uniformly,solid particles dispersed more homogeneously and aggregation scarcely occurred in the fluidized bed with louver baffles than that with channel baffles.The residence time distribution indicated that louver baffles remarkably suppressed gas back-mixing in comparison with channel baffles.The reasonable agreements of pressure distribution and reaction results between the simulation in the bed with channel baffles and the data on a large-scale industrial apparatus demonstrated the accuracy of the CFD model.The predicted conversion of SiCl_(4) in the bed with louver baffles(27.44%)was higher than that with channel baffles(22.69%),indicating that louver baffles markedly improved the performance of the fluidized bed.This study could provide useful information for future structural improvements of baffles in large-scale fluidized beds.

关 键 词：FLUIDIZED-BED BAFFLE Gas-solids flow HYDROGENATION Computational fluid dynamics 

分 类 号：TQ021.1[化学工程]