Distribution characteristics of holdups in a multi-stage bubble column using electrical resistance tomography--颗粒学报PARTICUOLOGY

Jin, H., Lian, Y., Qin, Y., Yang, S., & He, G. (2013). Distribution characteristics of holdups in a multi-stage bubble column using electrical resistance tomography. Particuology, 11(2), 225–231. https://doi.org/10.1016/j.partic.2012.05.005

Distribution characteristics of holdups in a multi-stage bubble column using electrical resistance tomography

Haibo Jin^*, Yicheng Lian, Yujian Qin, Suohe Yang, Guangxiang He

Department of Chemical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China

10.1016/j.partic.2012.05.005

Volume 11, Issue 2, April 2013, Pages 225-231

Received 13 November 2011, Revised 27 March 2012, Accepted 14 May 2012, Available online 6 September 2012.

E-mail: jinhaibo@bipt.edu.cn

Highlights

► Distribution features of holdups in a bubble column embedded with sieve plates were studied.

► Gas holdup and its radial distribution were measured with electrical resistance tomography (ERT).

► Effects of plate geometric parameters and gas velocity on gas holdup distribution were investigated.

Abstract

Based on the principle of chemical reaction engineering, the addition of perforated plates can improve the performance of conventional bubble column and decrease the backmixing behaviors. The distribution characteristics of gas holdup in a multi-stage bubble column embedded with five types of sieve plates and three types of tongue plates were studied using electrical resistance tomography (ERT). The effects of superficial gas velocity and the geometric design of perforated plates on the gas holdup and its radial distribution above and below the plates of the bubble column were discussed. Experimental results show ERT is suitable as an online monitoring tool to provide useful information on the hydrodynamic parameters of multi-stage bubble columns. With increasing superficial gas velocity, local gas holdup increases, and gas holdup below the plate increases with decrease of free area (%FA), hole diameters or angle of tongue plates. ERT technique facilitates noninvasive and nonintrusive visualization of cross-sectional distribution of gas holdup in a bubble column.

Graphical abstract

Keywords

Bubble column; Electrical resistance tomography; Differential pressure method; Sieve plates; Tongue plate

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