Analysis of solid concentration distribution in dense solid-liquid stirred tanks by electrical resistance tomography

A1 Journal article (refereed)


Internal Authors/Editors


Publication Details

List of Authors: Claudio Carletti, Giuseppina Montante, Tapio Westerlund, Alessandro Paglianti
Publisher: PERGAMON-ELSEVIER SCIENCE LTD
Publication year: 2014
Journal: Chemical Engineering Science
Journal acronym: CHEM ENG SCI
Volume number: 119
Start page: 53
End page: 64
Number of pages: 12
ISSN: 0009-2509
eISSN: 1873-4405


Abstract

The knowledge of the spatial solids distribution is important for predicting the performance of various processes carried out in mechanically stirred equipment. In this work, the solid suspension in a stirred tank equipped with PBT and Lightnin A310 impellers is investigated by electrical resistance tomography (ERT). The analysis concerns dense solid–liquid systems, with mass ratio of suspended solid to liquid up to 0.43, with the main goal of obtaining detailed information on the spatial distribution of the dispersed phase and on the mixing quality. The shape of the interface between the solid mixture and the clear liquid layer is also determined. The results provide insight into the complex behaviour of dense suspensions and can be adopted as a benchmark for advanced modeling techniques based on CFD methods.

Based on the experimental results, a method for the evaluation of the distribution of the solids under different working conditions and geometrical set-up is suggested. This criterion can provide a guideline for scale-up, when equal solid distribution at different scales is required.


Keywords

Mixing, Multiphase flow, Slurries, Stirred tank, Suspension, Tomography

Last updated on 2019-19-08 at 06:52