Centrifuges and centrifuge cleaning methods
AssigneeThe Chartwell House Group Limited
InventorPeter H. E. Bennett
Life of this patent
Estimating the term…
Abstract
The drum of a centrifugal filter is cleaned by stopping the rotation of blades which normally rotate with the drum, while allowing the drum to continue to rotate, and retracting the bottom of the drum to open an annular aperture through which accumulated contaminants dislodged by the blades discharge.
Claims6
In a centrifuge comprising a drum, a drive system for rotating the drum, an inlet for supplying contaminated liquid to the drum, the drum having at least one orifice in its upper part to permit the discharge of filtered liquid;
- the improvement comprising an apertured lower end to the durm, a closure movable between a position in which said aperture is closed by the closure and a position in which the aperture is open, a cleaning member disposed within the drum for movement relative to the axis drum;
- means for effecting displacement of said closure into its position uncovering the aperture during a cleaning operation, and means for establishing relative movement between the cleaning member and the drum during such cleaning operation, said drum having a peripheral wall drivable continuously in rotation by the drive system, the lower end of said wall defining said aperture, said closure being constituted by a bottom wall movable parallel to the axis of the drum between a raised closed position and a lowered open position.
In a centrifuge comprising a drum, a drive system for rotating the drum, an inlet for supplying contaminated liquid to the drum, the drum having at least one orifice in its upper part to permit the discharge of filtered liquid, the improvement comprising a wall member having therein a circular aperture within which said drum is disposed, means for collected filtered liquid discharged onto said wall member from the drum via said at least one orifice, a tank disposed beneath said wall member for receiving contaminated liquid;
- said drum having a peripheral wall and being open bottomed, a closure for said open bottom, means for displacing said closure from a position closing said open bottom into a position defining an annular aperture, during a drum cleaning operation, and a cleaning member within said drum for effecting discharge of accumulated contaminants through said aperture.
Dependencies are inferred from the claim text.