The hydrocyclone is a static, continuous particle size separation device that can also be used for phase separations, including solid-liquid, liquid-liquid and liquid-gas separations and has been used for various classification duties since the 19th century.

Hydrocyclones are attractive for industrial use as they have no moving parts, a small footprint, relatively low capital and operating costs, and are simple to operate. On the other hand, their operation is rather inflexible once installed and single-stage efficiencies may be low, especially for particles finer than 10 |im.

This article describes the mode of operation of hydrocyclones, and the motion of fluid and solid particles in the classifier. Quantifying the separation is followed by the effect of the major design and operating variables on the efficiency.

Two modelling approaches are introduced: a fundamentally based model, including computational fluid dynamics (CFD), and empirical models, which are still in general use.

The article concludes with aspects of further development.

Solar Panel Basics

Solar Panel Basics

Global warming is a huge problem which will significantly affect every country in the world. Many people all over the world are trying to do whatever they can to help combat the effects of global warming. One of the ways that people can fight global warming is to reduce their dependence on non-renewable energy sources like oil and petroleum based products.

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