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Cyclonic separation is a method of removing particulates from an air (or gas) stream without the use of filters. A high speed rotating air-flow is established within a cylindrical or conical container called a cyclone. Air flows in a spiral pattern, beginning at the top (wide end) of the cyclone and ending at the bottom (narrow) end before exiting the cyclone in a straight stream through the center of the cyclone and out the top. Larger particles in the rotating air stream have too much inertia to follow the tight curve of the air stream and strike the outside wall, falling then to the bottom of the cyclone where they can be removed. In a conical system, as the rotating air-flow moves towards the narrow end of the cyclone the rotational radius of the air stream is reduced, separating smaller and smaller particles from the air stream. The cyclone geometry, together with air flow rate, defines the cut point of the cyclone. This is the size of particle that will be removed from the air stream with a 50% efficiency. Particles larger than the cut point will be removed with a greater efficiency, and smaller particles with a lower efficiency. Image File history File links Cyclone. ...
Image File history File links Cyclone. ...
Aerosol pollution over Northern India and Bangladesh - Photo: NASA Particulates, alternatively referred to as particulate matter (PM), aerosols or fine particles, are tiny particles of solid (a smoke) or liquid (an aerosol) suspended in a gas. ...
An air filter is a device which cleans dirty air. ...
Large scale cyclones are used in saw mills to remove sawdust from extracted air. Cyclones are also used in oil refineries to separate oils and gases. This article or section should be merged with Sawmill A saw mill is a machine used in forestry to cut trees into logs. ...
View of the Shell/Valero Martinez oil refinery An oil refinery is an industrial process plant where crude oil is processed and refined into useful petroleum products. ...
James Dyson's popular bagless dual and root cyclone vacuum cleaners employ a cyclonic technique. Dyson vacuum cleaner. ...
Regular vacuum cleaner for home use. ...
Smaller cyclones are used to separate airborne particles for analysis. Some are small enough to be worn clipped to clothing and are used to separate respirable particles for later analysis.
Analogous devices for separating particles or solids from liquids are called hydrocyclones or hydroclones. A sand separator or hydrocyclone is a device which utilizes centrifugal force to separate sand or other heavy particles out of water. ...
See also
It has been suggested that this article or section be merged with air cleaner. ...
A laboratory tabletop centrifuge A centrifuge is a piece of equipment, generally driven by a motor, that puts an object in rotation around a fixed axis, applying force perpendicular to the axis. ...
The Helikon vortex separation process is an aerodynamic uranium enrichment process designed around a device called a vortex tube. ...
External link - Hydroclone Frequently Asked Questions - Hydroclone.com
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