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Article | REF: J3580 V1

Dusting and stripping

Author: Bernard SIRET

Publication date: June 10, 2001

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6. Bag filters

These are dust collectors in which the dust-laden fumes pass through a filter layer on which the particles are deposited. Unlike cyclone separators or scrubbers, where particles are removed continuously, in this case they accumulate and must be periodically separated by a cleaning process. The filter layer can consist of :

  • of woven media;

  • loose fibers or felts;

  • porous membranes, usually attached to a support ;

  • filter papers.

Filters can be either high-efficiency, used in nuclear and cleanroom applications, or standard-efficiency. In the former case, accumulated dust is often eliminated with the filter media itself, as entire cassettes have to be changed, whereas in the latter case, filter media last for...

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