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A structured-media mist eliminator is less prone to plugging than conventional knitted-mesh mist eliminators, achieves higher removal efficiencies per unit of pressure drop, and has lower energy consumption and operating costsMany process air and gas stream problems involve mist carryover and mist eliminator plugging. This often results in reduced product yield, excessive energy usage, corrosion of plant equipment, shorter-than-expected equipment and catalyst life, shortened plant run times, and/or not meeting output capacity requirements.

Mist eliminator basics

Any time a liquid comes into intimate contact with a flowing gas – as happens in many manufacturing processes – the entrainment of liquid droplets into the gas stream generates a mist. This mist can result in process inefficiencies, product losses and equipment damage.

The basic function of a mist eliminator is to collect and remove droplets from a gas stream. This is accomplished when the droplets within the flowing gas strike the mist eliminator media and are captured. The material coalesces on the media, and the larger droplets that form flow by gravity to a drainage area and are recovered.

The type of mist eliminator appropriate for a particular application is determined by the particle size of the mist to be collected. In order to select a mist eliminator and ensure that it functions efficiently, it is necessary to define the size of the droplets present in the system. Droplets are classified based on their particle diameters:

Sprays: larger than 10 microns•

Mists: 10 microns to 1 micron•

Aerosols: smaller than 1 micron•

The fibers of the mist eliminator media collect droplets by three different mechanisms........( article continues in depth)

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