Liquid purification or separation – Processes – Separating
Patent
1998-10-01
2000-08-29
Popovics, Robert J.
Liquid purification or separation
Processes
Separating
210617, 210618, 210792, 210793, 210797, 210798, 210150, 210151, 210248, 210196, 134 251, B01D 3700, C02F 304, C02F 306
Patent
active
061103896
ABSTRACT:
A filtration tank (1) for purification of polluted water includes a chamber (12). Upper and lower filtration screens (20, 22) are supported within the chamber. Filtration particles (18) are confined between the upper and lower screens. Polluted water enters the chamber through an inlet (26), passes through the screens and the filtration particles and exits the chamber through a purified water outlet (28). Periodically, the inlet and outlet are closed and the water in the chamber is drained through a drain outlet (32). Nozzles (42, 45) spray cleaning fluid over the filter particles and screens to dislodge trapped dirt.
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