Baffle and wash trough assembly for granular-media filters

Details Baffle and wash trough assembly for granular-media filters Baffle and wash trough assembly for granular-media filters

B - Operations, Transporting

01

D

182/98

B01D 24/00 (2006.01)

Patent

CA 1074237

BAFFLE AND WASH TROUGH ASSEMBLY FOR GRANULAR-MEDIA FILTERS Abstract A baffle and wash trough assembly is provided for reducing media loss during high-turbulence washing of granular-media filters. The assembly includes a water collection trough having an overflow weir on at least one side thereof and a lower portion with downwardly and inwardly converging sides, and a baffle supported adjacent one side of the trough; the baffle having a generally concave portion in opposed relation to the trough lower portion, and defining a restricted flow channel for the wash water to the trough. There may also be provided a second baffle supported adjacent the other side of the trough and having a generally concave portion in opposed relation to the other side of the trough lower portion. The lower end of the second baffle preferably terminates above and inwardly of the lower end of the first baffle, thereby defining a second channel for removal of backwash water. The baffle and backwash trough assembly is parti- cularly adapted for use with filters employing simultaneous application of air and water to produce a high turbulence backwash.

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