Liquid purification or separation – Particulate material type separator – e.g. – ion exchange or... – With rehabilitation means
Patent
1989-06-15
1991-05-28
Dawson, Robert A.
Liquid purification or separation
Particulate material type separator, e.g., ion exchange or...
With rehabilitation means
210275, 210279, 210293, 239549, B01D 2412
Patent
active
050192590
ABSTRACT:
A filter underdrain apparatus comprises plate means forming a plurality of horizontal distributor conduits, the conduits being in juxtaposed, laterally-spaced relationship and constructed and arranged to defined alternating conduits and troughs of a filter underdrain. At least some of the horizontal distributor conduits include interior partitions extending along such conduits and dividing the interior of each such conduit into a liquid passage and a gas passage. Liquid metering orifices communicate the interior of the liquid passage with the exterior of the distributor conduit for substantially evenly distributing backwash liquid flows from the liquid passage and for passing filtered liquid flows into the liquid passage. Gas metering orifices communicate the interior of the gas passage with the exterior of the distributor conduit for substantially evenly distributing gas from the gas passage when connected with a pressurized gas source. A screen arrangement may be included to screen the liquid and gas orifices from filter media exterior of the distributor conduits, and the screen may comprise perforate grids. The perforate grids may extend across the troughs between adjacent distributor conduits.
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patent: 3110667 (1963-11-01), Stuppy
patent: 3956134 (1975-05-01), Sturgill
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patent: 4118322 (1978-10-01), Sanroman
patent: 4196079 (1980-04-01), Ward
patent: 4331542 (1982-05-01), Emrie
Dawson Robert A.
Drodge Joseph
Dunsmuir George H.
Hinds William R.
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