Method and device for capturing fine particles by trapping in a solid mixture of carbon dioxide snow type
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United States of America Patent
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Nov 23, 2004
Grant Date -
Dec 5, 2002
app pub date -
Jun 13, 2002
filing date -
Dec 15, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention concerns a method for capturing very fine particles present in a fluid flux in liquid, gaseous or supercritical state and a device therefor. The method is characterized in that it comprises steps which consist in: causing said flux to pass through a filtering element (13); stopping the emission of said flux; countercurrent clearing of the filtering material (31) with a carbon dioxide flow under pressure, so as to drive the particles deposited on the filtering material (31); countercurrent expanding of the flux, so as to trap the particles within a solid carbon dioxide snow-type mixture formed during its expansion.
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