초록 ▼

A method and apparatus for filtering a liquid from a liquid/solid mixture using a centrifuge. The centrifuge has a conveyor having a hub and a flight for imparting a centrifugal motion to the liquid/solid mixture. The conveyor is rotated for imparting the centrifugal motion. A filter is carried in t

A method and apparatus for filtering a liquid from a liquid/solid mixture using a centrifuge. The centrifuge has a conveyor having a hub and a flight for imparting a centrifugal motion to the liquid/solid mixture. The conveyor is rotated for imparting the centrifugal motion. A filter is carried in the tank which holds the conveyor. The filter encircles the conveyor for filtering the liquid from the liquid/solid mixture. A backwash system has a tube having a series of nozzles positioned for spraying a fluid at the filter in a narrow band which circumscribes the filter. The tubing is connected to a header which projects out of the casing through an opening. The fluid sprayed through the nozzles is pumped through the header to the tubing having the nozzles. A cylinder is connected to the header for moving the header and the connected tubing longitudinally such that the nozzles move longitudinally along the filter for spraying the liquid against the filter in a narrow band distinct from a first narrow band by the relative movement of the nozzles to the filter. The fluid from the backwash system is at a force to counteract the centrifugal force of the mixture over the narrow band of the filter engaged by the spray. The fluid used for the backwash is the filtered liquid.

대표청구항 ▼

A centrifuge adapted for filtering a liquid from a liquid/solid mixture, the centrifuge comprising a conveyor having a hub and flights for imparting a centrifugal motion to the liquid/solid mixture; a casing, the casing defining a tank for receiving the conveyor, the casing having support means for

A centrifuge adapted for filtering a liquid from a liquid/solid mixture, the centrifuge comprising a conveyor having a hub and flights for imparting a centrifugal motion to the liquid/solid mixture; a casing, the casing defining a tank for receiving the conveyor, the casing having support means for supporting the conveyor; a drive means coupled to the conveyor for rotating the conveyor relative to the casing for creating rotation of the conveyor for imparting the centrifugal motion; a filter contained within the tank and encircling the conveyor including the flights, the filter for filtering the liquid from the liquid/solid mixture; and a toroidal backwash system having a tube having a toroidally arranged series of angled nozzles positioned for spraying a fluid at the filter in a narrow band which circumscribes the filter, a drive means for moving the series of nozzles longitudinally along the filter for spraying the liquid against the filter in a narrow band distinct from the first narrow band by the relative movement of the nozzles to the filter.