Application of a twin-plane electrical capacitance tomography sensor for characterising bubble behaviour in a gas-solids fluidized bed

Xiaoxu Li, Artur J. Jaworski, Xiaoan Mao

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Fluidized beds have been used extensively in general chemical engineering applications. However, due to their complex hydrodynamic characteristics, conventional measurement techniques are insufficient to obtain a full understanding. Electrical Capacitance Tomography (ECT) has been developed as a non-invasive measurement technique and applied to study gas-solids fluidized beds. This paper describes experiments carried out in a bench-scale fluidized bed using air and silica sand as gas-solids system. A twin-plane ECT sensor with 10 mm long measuring electrodes was designed and fabricated to study the single bubbling regime. This was based on numerical simulations to ensure that the measured capacitance values are within the detectable range of the ECT system. 2D and 3D frame-based visual analysis of bubbles formed in single bubbling regime are presented. Averaged bubble rising velocity derived by cross-correlation technique has been compared with existing empirical correlations. Good overall agreement has been found.

Original languageEnglish
Title of host publicationWCE 2016 - World Congress on Engineering 2016
EditorsS. I. Ao, S. I. Ao, Len Gelman, S. I. Ao, Len Gelman, David W.L. Hukins, Andrew Hunter, Alexander M. Korsunsky
PublisherNewswood Limited
Pages1100-1105
Number of pages6
ISBN (Electronic)9789881404800
Publication statusPublished - 2016
Externally publishedYes
EventWorld Congress on Engineering 2016, WCE 2016 - London, United Kingdom
Duration: 29 Jun 20161 Jul 2016

Publication series

NameLecture Notes in Engineering and Computer Science
Volume2224
ISSN (Print)2078-0958

Conference

ConferenceWorld Congress on Engineering 2016, WCE 2016
Country/TerritoryUnited Kingdom
CityLondon
Period29/06/161/07/16

Keywords

  • Averaged bubble velocity
  • Cross-correlation
  • Electrical capacitance tomography
  • Electrostatic field simulation
  • Fluidized bed

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