The Encyclopedia of Filters - Dust Collection Systems

Selection of a Dust Collector

Selection of a Dust Collector

The differences in design, operation, efficiency, space requirement, construction, and maintenance needs, as well as the initial start up, operating, and maintenance costs differ greatly between various products and systems. However in choosing which system will meet your needs the best, the following point should be considered:

Dust concentration and Particle size - Within any kind application the specific sizes and dust concentrations can vary enormously. Therefore, knowing the exact range of particle size and concentration levels that will be present will be vital in your choosing the proper Collection System.

Degree of collection required How intensive of a filtration action is needed is determined by several factors. The exact dangers and hazards of the contaminates to be captured, its potential as a public health risk or nuisance, site location, the allowable emission rate by the regulatory body for the given substance, characteristics of the dust, and any recyclable value.

Characteristics of the Gas stream Differences in Gas stream temperatures and humidity levels can great affect certain types of collectors. For example Gas temperatures above 180 F (82C) will destroy many types of filter media (Filter Bags) used in Fabric Collectors (Baghouses). Water vapor or steam can blind certain types of Filter Media. Corrosive and other chemicals can erode certain metals and other materials used in the construction of many Collectors.

Types of Dust Certain types of Collectors have a great deal of physical contact between the particles and the Collector itself. A number of different materials such as silica or metal ore are quite abrasive and can cause erosion through prolonged contact with the Collector. Other "sticky" compounds can attach themselves to the interior surfaces of the collector and cause blockages. The size and distinct shape of some types of dust render certain collection methods useless. When certain types of materials are fluidized into the air they become highly combustible. Under these circumstances Electrostatic Precipitators are instantly ruled out, along with most Inertial Separators.

Disposal Methods Differences in disposal methods betweens different locations. Collectors can be arranged to unload their collected matter either in a continuous mode or at a predetermined time interval. Removal of collected matter from dry systems can also result in secondary causes of dust pollution and contamination. While using a Wet Scrubber System will eliminate this concern, proper handling of slurry created during the cleaning cycle will involve an entirely different set of problems, such as precautions against water pollution, and proper care and maintenance of the retention ponds.

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The Encyclopedia of Filters - Dust Collection Systems

By: Dominick Dalsanto

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