B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
182/91
B01D 37/02 (2006.01) B01D 29/00 (2006.01)
Patent
CA 1190483
VERTICAL FILTER SYSTEM ABSTRACT OF THE DISCLOSURE A fiitration system utilizing a plurality coaxial, verti- cally disposed, filter elements for clarifying a liquid passed therethrough. Upon the accumulation of a predetermined amount of materials on or in the filter cake, the filter chamber is sealed and the contents drained creating a pressure differen- tial across the filter elements to maintain the integrity of the filter cake on the filter septum. After the contents of the filter chamber have been drained the chamber is positively pressurized to remove any filtrate remaining in the filter cake and to dry the filter cake on the filter septum prior to remov- al. The expended filter cake and accumulants are removed from the filter septum and conveyed from the filter chamber by a dis- charge system. The filter chamber is filled with liquid and the filter septum mechanically scrubbed to remove any residual materials therefrom. A quantity of precoat or filter aid mate- rial is added to the liquid in the filter chamber and the fil- ter aid bearing liquid circulated through the filter elements and the filtration system in a closed loop to form a precoat filter cake on the filter septum. The flow rate of the circula- tion is sufficient to maintain the integrity of the filter cake so formed until such time as the filter cake removes a suffi- cient amount of accumulants from the influent to create a prede- termined pressure differential thereacross which will maintain the integrity of the filter cake on the filter septum at the in- fluent flow rate.
418728
Idrex Incorporated
Osler Hoskin & Harcourt Llp
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