Research on the structure of the cylindrical hydrocyclone spigot to mitigate the misplacement of particles

The misplacement of particles in the hydrocyclone is the primary reason for the deterioration of separation sharpness and has obtained extensive attention. This paper presents a study on the flow field characteristics and separation performance of cylindrical hydrocyclones with different spigot upper diameter by the TFM model. The numerical results indicate that the spigot upper diameter has a slight effect on the tangential velocity, while a smaller spigot upper diameter implies a higher turbulence intensity and an immense internal swirling flow region, causing more coarse particles misplaced in the overflow. However, an oversize spigot upper diam-eter denotes a superabundant circulating flow, reducing the fine particles misplaced in the underflow, and in-creasing coarse particles misplaced in the overflow. Under the combined action of the internal swirling flow and the circulating flow, both undersize and oversize spigot upper diameter generates a negative classification performance of the cylindrical hydrocyclone. (c) 2021 Published by Elsevier B.V.

Automated summary

This paper investigates the flow field characteristics and separation performance of cylindrical hydrocyclones with different spigot upper diameters using the TFM model. The study finds that the spigot upper diameter significantly impacts the separation efficiency, with both undersize and oversize diameters leading to particle misplacement and negative classification performance.