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A bag (BH, B/H), bag filter (BF) or fabric filter (FF) is an air pollution control device that removes particulates out of air or gas released from commercial processes or combustion for electricity generation. Unlike Electrostatic precipitators, where performance may vary significantly depending on the process and electrical conditions, functioning bag houses typically have a particulate collection efficiency of 99% or better, even when the particle size is very small. Baghouses are very efficient particulate collectors because of the dust cake formed on the surface of the bags. The fabric provides a surface on which dust collects through the following four mechanisms.

The three most common types of baghouses are mechanical shakers, reverse gas, and pulse jet. Pulse jet bag filters are basically used science report example in air pollution control equipment. The finest part of this system is that it can filter heavy dust burdens and achieve desired collection efficiency at high temperature.

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