Experimental investigation of hydrodynamics of liquid–solid mini-fluidized beds--颗粒学报PARTICUOLOGY

Tang, C., Liu, M., & Li, Y. (2016). Experimental investigation of hydrodynamics of liquid–solid mini-fluidized beds. Particuology, 27, 102-109. https://doi.org/10.1016/j.partic.2015.03.011

Experimental investigation of hydrodynamics of liquid–solid mini-fluidized beds

Can Tang ^a, Mingyan Liu ^{a b *}, Yanjun Li ^a

a Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
b State Key Laboratory of Chemical Engineering (Tianjin University), Tianjin 300072, China

10.1016/j.partic.2015.03.011

Volume 27, August 2016, Pages 102-109

Received 2 January 2015, Revised 13 February 2015, Accepted 23 March 2015, Available online 8 September 2015, Version of Record 14 June 2016.

E-mail: myliu@tju.edu.cn

Highlights

• Liquid–solid fluidization in mini-fluidized beds (MFBs) was experimentally investigated.

• The study was focused on wall effect in MFBs.

• Influence of particle size distribution on Richardson-Zaki exponent was explored.

Abstract

Expanded fluidization behavior in liquid–solid mini-fluidized beds (MFBs) was experimentally investigated using visual measurements. Wall effects in the liquid–solid MFBs were identified and explained. The measured incipient/minimum fluidization liquid velocity (u_mf) in the MFBs was 1.67 to 5.25 times higher than that calculated using the Ergun equation when the ratio of solid particle diameter to bed diameter varied from 0.017 to 0.091. The ratio of the Richardson–Zaki (R–Z) exponent obtained by fitting with experimental data to that calculated using the R–Z correlation varied from 0.92 to 0.55. A wider solid particle size distribution resulted in a smaller R–Z exponent. The influence of the solid particle material on u_mf and R–Z exponent was negligible.

Graphical abstract

Keywords

Liquid–solid fluidization; Mini-fluidized bed; Expansion bed; Wall effect; Particle size distribution

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