Fluidization of non-spherical particles: Sphericity, Zingg factor and other fluidization parameters--颗粒学报PARTICUOLOGY

Liu, B., Zhang, X., Wang, L., & Hong, H. (2008). Fluidization of non-spherical particles: Sphericity, Zingg factor and other fluidization parameters. Particuology, 6(2), 125–129. https://doi.org/10.1016/j.cpart.2007.07.005

Fluidization of non-spherical particles: Sphericity, Zingg factor and other fluidization parameters

Baiqian Liu^*, Xiaohui Zhang, Ligang Wang, Hui Hong

School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China

10.1016/j.cpart.2007.07.005

Volume 6, Issue 2, April 2008, Pages 125-129

Received 13 March 2007, Accepted 6 July 2007, Available online 7 March 2008.

E-mail: liubq2007@sohu.com

Highlights

Abstract

A comparison of sphericity and Zingg factor for particle morphology and description of fluidized-bed dynamics are presented. It is found that Zingg factor F_z = LH/B² (where L, H and B are, respectively, the length, breadth and height of a particle) well describes the effect of particle morphology. Experimental results show that non-spherical particles give poor fluidizing quality as compared to spherical particles in terms of pressure drop, U_mf, etc. With the same volume-equivalent diameter, non-spherical particles have lower U_mf and fluidizing coefficient δ. Some smooth curves have been obtained between the parameters δ, Umf and F_z. The quality of fluidization could be evaluated by fluidizing coefficient, which has been correlated to the Zingg factor and minimum fluidizing velocity in this paper.

Graphical abstract

Keywords

Particle morphology; Fluidized-bed; Sphericity; Non-spherical particle

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