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Difference between revisions of "Baghouses"
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[[File:Baghouses_04.jpg|thumb|right|Industrial baghouse]] | [[File:Baghouses_04.jpg|thumb|right|Industrial baghouse]] | ||
A baghouse (BH, B/H) 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. Power plants, steel mills, pharmaceutical producers, food manufacturers, chemical producers and other industrial companies often use baghouses to control emission of air pollutants. Baghouses came into widespread use in the late 1970s after the invention of high-temperature fabrics (for use in the filter media) capable of withstanding temperatures over 350°F. | A baghouse (BH, B/H) 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. Power plants, steel mills, pharmaceutical producers, food manufacturers, chemical producers and other industrial companies often use baghouses to control emission of air pollutants. Baghouses came into widespread use in the late 1970s after the invention of high-temperature fabrics (for use in the filter media) capable of withstanding temperatures over 350°F. | ||
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The air to cloth ratio for shaker baghouses is relatively low, hence the space requirements are quite high. However, because of the simplicity of design, they are popular in the minerals. | The air to cloth ratio for shaker baghouses is relatively low, hence the space requirements are quite high. However, because of the simplicity of design, they are popular in the minerals. | ||
===Reverse Air (R/A) Baghouses (aka Reverse Gas)=== | ===Reverse Air (R/A) Baghouses (aka Reverse Gas)=== | ||
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==Baghouse Performance== | ==Baghouse Performance== | ||
Baghouse performance is contingent upon inlet and outlet gas temperature, pressure drop, opacity, and gas velocity. The chemical composition, moisture, acid dew point, and particle loading and size distribution of the gas stream are essential factors as well | Baghouse performance is contingent upon inlet and outlet gas temperature, pressure drop, opacity, and gas velocity. The chemical composition, moisture, acid dew point, and particle loading and size distribution of the gas stream are essential factors as well | ||
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==Baghouse Design Variables== | ==Baghouse Design Variables== | ||
Pressure drop, filter drag, air-to-cloth ratio, and collection efficiency are essential factors in the design of a baghouse. | Pressure drop, filter drag, air-to-cloth ratio, and collection efficiency are essential factors in the design of a baghouse. | ||
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*Commonly, baghouses are designed with 99.9% collection efficiency. Oftentimes, cleaned air is recirculated back into the plant for heating. | *Commonly, baghouses are designed with 99.9% collection efficiency. Oftentimes, cleaned air is recirculated back into the plant for heating. | ||
===Baghouse Filter Media=== | ===Baghouse Filter Media=== | ||
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Some baghouses use pleated cartridge filters, similar to what is found in home air filtration systems. | Some baghouses use pleated cartridge filters, similar to what is found in home air filtration systems. | ||
==Components of a Baghouse== | ==Components of a Baghouse== | ||
*Bags, fabric & support | *Bags, fabric & support | ||