Method and means for filtering an air stream with an aqueous froth
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United States of America Patent
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Sep 9, 2003
Grant Date -
N/A
app pub date -
Jul 10, 2001
filing date -
Oct 7, 1999
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A method and apparatus for filtering an air stream with an aqueous froth are provided. The process includes: passing a contaminated air stream through a diffusing sieve, into an aqueous solution in an expansion chamber; generating, maintaining, and containing an aqueous froth between the liquid-bath reservoir and a saturated fiber element; and continually saturating a coarse-fiber element with liquid from the aqueous solution. The froth is generated and maintained, and the fiber element is saturated, by controlling the dynamic interface between the contaminated air stream and the liquid-bath reservoir. The apparatus for filtering an air stream includes: an air filter device that incorporates a liquid-bath filter initial stage; an aqueous-froth filter second stage; a constantly saturated, coarse-fiber filter as a combined third stage and froth-limiter; and a moist, fine-fiber filter as the final stage.
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