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AMISTCO Separation Products offers superior performing candle filters and turnkey submicron mist eliminator packaged solutions for Sulfuric Acid production, other processes involving acids and a wide range of pollution control applications. As the Western Hemisphere licensee for Begg Cousland we manufacture a proven unique candle filter technology to complement our comprehensive line of mesh pad and vane type mist eliminators.
The Begg Cousland candle filter was originally developed in the laboratories of I.C.I.. After 30 years of proof in the field, these unique candle filter materials and construction have increased separating efficiency, lowered pressure drop or in some cases both in numerous separation applications replacing other candle filter technologies.
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With the addition of candle filters, AMISTCO provides customers with superior new or retrofit separations technologies to handle everything from submicron mists to large droplets. Our engineering expertise and fabricating capabilities go one step further to offer customers packaged pollution control and product recovery systems assemblies.
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Candle filters remove liquid particulates by means of impaction for particles greater than 3 microns, interception for particles greater than 1-2 microns and Brownian diffusion for submicron droplets. As mist laden gas passes through the filter bed, surrounding gas molecules surround the fine mist particles causing random side to side (Brownian) movement while traveling through the mesh of fiber. This Brownian movement causes the submicron droplets to eventually collide with a fiber. Low velocities are required for the diffusion velocities associated with Brownian movement.
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Each candle filter is composed of millions of fibers. These fibers are carefully packed in dense form into a 2-inch annular space between two concentric cages. These candles are installed vertically and grouped together in multiples or as a single candle. Gases travel horizontally through the filter. Particles are collected on the fibers by various means, coalesce and drain down through the filter bed. Depending upon the application gas flow can be directed inside/out or outside/in the candles.
