The CREC-GS-Optiprobes and its focal region Gas-solid flow measurements in down flow reactors

被引：10

作者：

Islam, Mohammad Ashraful ^{[1
]}

Krol, Stefan ^{[1
]}

de Lasa, Hugoi I. ^{[1
]}

机构：

[1] Univ Western Ontario, Dept Chem & Biochem Engn, Chem Reactor Engn Ctr, Fac Engn, London, ON N6A 5B9, Canada

来源：

CHEMICAL ENGINEERING SCIENCE | 2011年 / 66卷 / 08期

关键词：

Fluidization; Agglomeration; Particulate processes; Instrumentation; Optical sensors; Downer reactors; PARTICLE-VELOCITY; GRIN LENSES; DISTRIBUTIONS; RISER; PROBE;

D O I：

10.1016/j.ces.2011.01.004

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The Chemical Reactor Engineering Center - Gas Solid - Optiprobes (CREC-GS-Optiprobe) can be used to determine particle cluster properties in down flow reactors. These properties include solid hold-up, cluster size and cluster velocity. Critical to this task is the determination of the "focal region''. It is established in this study that the CREC-GS Optiprobes display an "effective focal region'' smaller than the focal region calculated using geometrical and optical considerations. In this respect, an effective focal region'' of 118 mu m with a standard deviation of 34 mu m is established on the basis of different considerations including experimental observations. The existence of this "effective focal region'' is most valuable in downer units given it makes the CREC-Optiprobe a suitable tool for measurements of clusters sizes with an average diameter of 84 mm FCC particles as well as local solid concentration. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：1671 / 1684

页数：14

共 37 条

[1] EFFECTIVE RADIUS AND NUMERICAL APERTURE OF GRIN LENSES WITH REVOLUTION SYMMETRY [J].