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US 5,630,434 AGranted
Filter regeneration system
OwnerDonald J. Gray, Peter T. E. Gebhard, IIIinventors
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Abstract
Stripping contaminants/impurities from a filter includes subjecting the filter to a negative gauge pressure and applying superheated solvent vapor to the filter while maintaining the negative gauge pressure. The filter can be heated prior to being subjected to the negative gauge pressure. The superheated vapor may be composed of the same compounds as impurities being removed from the filter. The filter may be an activated carbon filter.
Claims6
A method of stripping contaminants from a filter comprising the steps of:
- subjecting the filter to a negative gauge pressure;
- stripping contaminants from the filter by applying superheated solvent vapor to the filter while maintaining the negative gauge pressure, whereby the negative gauge pressure and the superheated solvent vapor combine to vaporize liquid contaminants embedded in the filter.
A method of stripping contaminants from an activated carbon filter, comprising the steps of:
- subjecting the activated carbon filter to a negative gauge pressure;
- stripping contaminants from the filter by applying superheated solvent vapor to the filter while maintaining the negative gauge pressure, whereby the negative gauge pressure and the superheated solvent vapor combine to vaporize liquid contaminants embedded in the filter.
Dependencies are inferred from the claim text.