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More Questions and Answers
Q: What's the best type of dust collector filter for applications involving sticky dusts?
A: John Dauber, Camfil Farr APC, says:
As a first step, it's important to have a dust sample tested to determine its properties. A reputable dust collection equipment manufacturer or an independent lab should be able to conduct bench tests to analyze the dust. By doing so, you will know what you're dealing with up front and be in a position to make the best decision on filter media.
Testing is particularly important when dealing with sticky or wet products, which present a challenge to all dust collectors. Available solutions include moisture-resistant blended media that have a silicone treatment to help repel the water. Also available are 100-percent spunbonded polyester cartridges with hydro-oleophobic treatments that resist moisture and allow filters to be washed.
But let's face it: When you mix moisture and dust you get some type of mud, and special media can only do so much. If the material being collected is very sticky or high in moisture, a continuous-injection system that injects a dry pre-coat dust may be needed. Lime, diatomaceous earth, expanded perlite, or other dry material can be injected into the incoming airstream to keep the wet or sticky material from adhering to the media. This provides a barrier between the material being collected and the media.
Again, a good supplier can apply experience as well as testing to help you consider the best available options for your application.
Camfil Farr APC is an Arkansas-based supplier of industrial dust collectors and vacuum systems.
To send us your questions email awiebe@cscpub.com
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