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US 4,676,807 AGranted
Process for removal of liquid aerosols from gaseous streams
AssigneePall Corporation
InventorsJohn D. Miller, Evan E. Koslow, Kenneth M. Williamson
Life of this patent
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AssigneePall Corporation
InventorsJohn D. Miller, Evan E. Koslow, Kenneth M. Williamson
Estimating the term…
Processes for the high efficiency removal liquid aerosols from gaseous streams and coalescing filters for carrying out such processes are provided. The filter comprises a porous medium having a critical surface energy less than the surface tension of the liquid to be removed and the dynamic film thickness of the liquid to be removed is from about 0.5 D to about 0.8 D, where D is the mean pore diameter of the porous medium, whereby, in operation, the correlation of the pore size with the dynamic film thickness of the liquid coupled with the relationship between the surface tension of the liquid and the critical surface energy of the porous medium provide high efficiency removal of the liquid aerosol with a minimum resistance of flow. The effluent typically contains 0.05 ppm or less, by weight, of aerosol.
A process for filtering liquid aerosol from a gaseous stream which comprises passing the liquid aerosol-containing gaseous stream through a coalescing filter, said filter comprising a porous medium having a critical surface energy less than the surface tension of the liquid to be removed and the dynamic film thickness (t) of the liquid to be removed is from about 0.5 D to about 0.8 D, where D is the pore size of said porous medium, whereby, in operation, the correlation of the pore size of said porous medium with the dynamic film thickness of said liquid coupled with the relationship between the surface tension of said liquid and the critical surface energy of said porous medium provide high efficiency removal of said liquid aerosol.
Dependencies are inferred from the claim text.