B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
B01D 24/10 (2006.01) B01D 24/30 (2006.01) B01D 24/46 (2006.01)
Patent
CA 2068769
- 16 - SYSTEM AND METHOD OF DECREASING WASTE FLUID IN CONTINUOUS BACKWASH FILTRATION Bruce R. Johnson ABSTRACT OF THE INVENTION A filtering system includes a filter vessel (11) containing a movable granular media bed (16), a feed stream inlet port (15) for flowing a liquid-solid stream through the bed for filtration, a dirtied media outlet (22) and a cleaned effluent outlet (19). A vertical cleaning section in either a separate stand-alone washing section vessel (30) or in a washing section (89) within the filter vessel, includes a wash path in which a washing liquid typically a portion of the cleaned effluent washes contaminants from the dirtied media resultant from filtration of the feed stream. The resultant contaminants-containing wash water is pumped to waste but a sidestream (50) thereof is recycled at least in part to the filter vessel to a location (49) in the vessel between the feed stream inlet port and the dirtied media outlet so that the liquid ordinarily transported with the dirty media at the bottom of the filter is replaced, at least in part with the recycle liquid.
Baker Hughes Incorporated
Borden Ladner Gervais Llp
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