Prediction of particles separation in narrow inclined channels of liquid–solid fluidized bed

• Published in: Powder technology Vol. 360; pp. 562 - 568
• Main Authors: He, Shengrong, Li, Yanfeng, Liu, Taishan, Li, Zhengyong, Chen, Peng, Zhao, Yanfeng, Liang, Long, Zhang, Jie
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 15.01.2020; Elsevier BV
• Subjects: Channels; Equilibrium position; Fluidized beds; Liquid–solid fluidized bed; Motion characteristics; Narrow inclined channels; Overflow; Particle size; Separation; Motion characteristics; Equilibrium position; Liquid–solid fluidized bed; Narrow inclined channels
• ISSN: 0032-5910; 1873-328X
• DOI: 10.1016/j.powtec.2019.10.078

The motion characteristics of particles in narrow inclined channels were analyzed. The relationship between the equilibrium positions of the particles and the particle size was established from the hydrodynamic description of the particles transported in narrow inclined channels. A novel theoretical model was proposed to describe the movement behaviour of particles. A new evaluation index, η, was proposed to characterize the separation capacity of narrow inclined channels for handling particles. An experimental system was built to verify the model. The results indicated that the established model was proved to be highly accurate in prediction of particle size range of separation. Specifically, particles covering the full size range of 0–0.8 mm were conveyed to the overflow with almost 50% probability. The effective particle size range of separation increased greatly based on density. The studies are beneficial to the design of narrow inclined channels structure in industry as well as operation conditions. [Display omitted] •A novel theoretical model of particle separated in narrow inclined channel is proposed.•A comprehensive hydrodynamic of the particles transport is described in narrow inclined channel.•Prediction of particles separation can be obtained with the theoretical model.•Suitable experimental system is established to verify the model.