Numerical investigation of hydrocyclone feed inlet configurations for mitigating particle misplacement

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Abstract

Hydrocyclones used for separating coal particles (<2 mm) by sizes suffer from particle misplacement related to different particle densities. This paper presents a numerical study on the flows and performance of hydrocyclones by a validated two-fluid model. Involute and laminar spiral inlet configurations with the potential for reducing the adverse effect of particle density are investigated at different feed solid concentrations and particle densities. Numerical results show that laminar spiral inlet configuration leads to less energy consumption and better mitigates the misplacement of coarse and fine particles at overflow and underflow compared with involute inlet configuration. Such advantages become less evident for dilute operations and heavy-particle feeds. Fluid flows and particle behavior are analyzed in detail. The roles of short-circuit and secondary flows near the vortex finder as well as the downward flow in the spigot area are thus revealed related to particle misplacement for cyclones with different inlets.

Original languageEnglish
Pages (from-to)16823-16833
Number of pages11
JournalIndustrial and Engineering Chemistry Research
Volume58
Issue number36
DOIs
Publication statusPublished - 11 Sep 2019

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