Skip to main content
Kent Academic Repository

Monitoring of particle motions in gas-solid fluidized beds by electrostatic sensors

Yang, Yao, Zhang, Qing, Zi, Can, Huang, Zhengliang, Zhang, Wenbiao, Liao, Zuwei, Wang, Jingdai, Yang, Yongrong, Yan, Yong, Han, Guodong and others. (2017) Monitoring of particle motions in gas-solid fluidized beds by electrostatic sensors. Powder Technology, 308 . pp. 461-471. ISSN 0032-5910. E-ISSN 1873-328X. (doi:10.1016/j.powtec.2016.11.034) (KAR id:59585)

Abstract

Gas-solid fluidized beds are widely applied in numerous industrial processes. Particle motions significantly affect the performance of fluidized bed reactors and the characterization of particle movements is therefore important for fluidization quality monitoring and scale-up of reactors. Electrostatic charge signals in the fluidized bed contain much dynamic information on particle motions, which are poorly understood and explored. In this work, correlation velocities of Geldart B and D particles were measured, analyzed and compared by induced electrostatic sensors combined with cross-correlation method in the fluidized bed. The results indicated that the average correlation velocity of particle clouds increased and the normalized probability density distributions of correlation velocities broadened when the superficial gas velocity increased in the dense-phase region. Both upward and downward correlation velocities could be acquired in the dynamic bed level region. Under the same excess gas velocity, the average correlation velocity of Geldart D particles was significantly smaller than that of Geldart B particles, which was caused by the smaller bubble sizes caused by the dominant bubble split over coalescence and less volume of gas forming bubbles for Geldart D particles. The experimental results verified the reliability and repeatability of particle correlation velocity measurement by induced electrostatic sensors in the gas-solid fluidized bed, which provides definite potential in monitoring of particle motions.

Item Type: Article
DOI/Identification number: 10.1016/j.powtec.2016.11.034
Uncontrolled keywords: Induced electrostatic signal; gas-solid fluidized bed; cross-correlation method; correlation velocity
Subjects: T Technology
Divisions: Divisions > Division of Computing, Engineering and Mathematical Sciences > School of Engineering and Digital Arts
Depositing User: Tina Thompson
Date Deposited: 09 Dec 2016 15:58 UTC
Last Modified: 08 Dec 2022 23:19 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/59585 (The current URI for this page, for reference purposes)

University of Kent Author Information

  • Depositors only (login required):

Total unique views for this document in KAR since July 2020. For more details click on the image.