Investigation of gas-solids flow characteristics in a conical fluidised bed dryer by pressure fluctuation and electrical capacitance tomography

R. Ge, J. Ye, H. Wang, W. Yang

    Research output: Contribution to journalArticlepeer-review

    Abstract

    It is important to investigate the gas–solids flow characteristics of fluidized bed drying processes to improve the operation efficiency and guarantee the product quality. This paper presents research into fluidized bed drying processes measured by high-frequency differential pressure fluctuation and electrical capacitance tomography (ECT). Power spectra analysis is combined with dynamic calibration for ECT to reveal the complex gas–solids flow behavior. Bubble characteristics are visualized by cross-sectional and quasi-3D ECT images. In addition, results by discrete wavelet transform analysis are given and compared with the analysis results of previous sections. It has been found that bubbles would coalesce in different ways under different operation conditions, and discrete wavelet transform sub-signals of ECT measurements are sensitive to particle moisture. This work reveals the complex hydrodynamic behavior in the fluidized bed dryer and provides valuable information for process control.
    Original languageEnglish
    Pages (from-to)1359-1372
    Number of pages14
    JournalDrying Technology
    Volume34
    Issue number11
    Early online date6 Jan 2016
    DOIs
    Publication statusPublished - 2016

    Research Beacons, Institutes and Platforms

    • Manchester Institute for Collaborative Research on Ageing

    Fingerprint

    Dive into the research topics of 'Investigation of gas-solids flow characteristics in a conical fluidised bed dryer by pressure fluctuation and electrical capacitance tomography'. Together they form a unique fingerprint.

    Cite this