Liquid purification or separation – With program actuator
Patent
1976-09-16
1978-11-07
Adee, John
Liquid purification or separation
With program actuator
210327, 210328, 210329, B01D 2902
Patent
active
041245075
ABSTRACT:
A filtering apparatus with hollow filters that are alternately placed under reduced pressure and positive pressure. The filters are reciprocally rotated through a cycle along a 180.degree. arcuate path from immersion in the unfiltered liquid to a discharge station and back again. Whle immersed and under reduced pressure, each filter passes liquid and captures cake against its surface. The filter is kept under reduced pressure and rotated to a discharge station. The reduced pressure during this portion of the cycle holds the cake against the filter and dries it. At the discharge station, the filters are placed under positive pressure to dislodge the cake and kept under positive pressure as they are rotated back toward the unfiltered liquid. The discharge station has movable scrapers that contact the filters as they are being rotated back to the unfiltered liquid to assist in dislodging the cake. The filters are arranged in two opposing sets capable of meshing with each other in the liquid and operable either in phase or approximately 180.degree. out of phase. The invention includes an adjustable control means that controls the operation of all the moving parts of the apparatus as well as the timing and duration of the pressures applied to the filters. The control means can vary the overall time period of a filter's cycle as well as the length of time the filter spends in each portion of its cycle.
REFERENCES:
patent: 2326484 (1943-08-01), Moreton
patent: 3298524 (1967-01-01), Gaudfrin
patent: 3950254 (1976-04-01), Donovan et al.
Adee John
Hanes Richard W.
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