Downer reactor flow measurements using CREC-GS-Optiprobes

作     者：Abbasi, Alireza Islam, Mohammad Ashraful Ege, Paul E. de Lasa, Hugo I. 

作者机构：Univ Western Ontario Dept Chem & Biochem Engn London ON N6A 5B9 Canada Reactech Proc Dev Inc Markham ON Canada 

出 版 物：《POWDER TECHNOLOGY》 (粉末工艺学)

年 卷 期：2012年第224卷

页      面：1-11页

核心收录：

学科分类：0817[工学-化学工程与技术] 08[工学] 

基　　金：Natural and Engineering Research Council (NSERC) 

主　　题：Optical sensors Downer units CPFD simulation Cluster particle velocity 

摘      要：The present study describes the potential intrusive effects of CREC-GS-Optiprobes on the flow pattern in gas-solid downflow units. Granular flows and their interactions with the CREC-GS-Optiprobes are calculated using a CPFD (Computational Particle Fluid Dynamic) numerical scheme in three dimensions, using particle clusters. Once particles dispersed in the column, the numerical simulations revealed that these particles formed a relatively homogeneous suspension with cluster formation and solids accelerating until reaching a fully-developed regime. CPFD simulations showed that two axially aligned CREC-GS-Optiprobes, when placed in the fully developed flow regime, introduce minimum perturbations in the gas-solid suspension. Therefore this CREC-GS-Optiprobe creates a highly illuminated focal region where hydrodynamic parameters can be measured without significant flow disturbance. Thus, this study supports the application of fiber optic probes;such as in the case of the CREC-GS-Optiprobes, which can provide undisturbed axial particle cluster velocity, axial cluster slip velocities, cluster size and solid fraction measurements at strategically selected locations in the gas-solid downer unit. (C) 2012 Elsevier B.V. All rights reserved.