Apparatus for controlling discharge of classified sand from a hy

Details Apparatus for controlling discharge of classified sand from a hy Apparatus for controlling discharge of classified sand from a hy

1975-11-05

1977-07-26

Lutter, Frank W.

Classifying, separating, and assorting solids

Fluid suspension

Liquid

209465, 209496, 209208, B03B 566

Patent

active

040381781

ABSTRACT:
A hydraulic classifier for sand has a vessel of circular cross section about a vertical axis and tapers downward to an aperture in its bottom. A rotor is slowly rotated on a hollow shaft coaxially mounted in the vessel. It includes a hollow member conically tapering from an annular lower orifice upwardly spaced from the bottom aperture toward a smaller upper orifice, a flow tube mounted on the shaft for receiving liquid upwardly discharged from the upper orifice of the hollow member for upward flow, agitating blades projecting radially outward beyond the flow tube above the hollow member, and a nozzle on the shaft below the hollow member for forcing cleaned sand through the bottom aperture of the vessel by means of a flushing medium. A washing nozzle directs a liquid washing medium radially inward toward the conical hollow member intermediate the orifices of the same whereby washing medium is deflected into the flow tube and draws additional liquid from the upper orifice. The flow tube, hollow member, and lowermost portion of the shaft bound an annular path for downward movement of a suspension of sand fed to the vessel above the flow tube.

REFERENCES:
patent: 1265734 (1918-05-01), Brunker
patent: 1705351 (1929-03-01), Andrews
patent: 1716309 (1929-06-01), Fournier
patent: 1749350 (1930-03-01), McQuail
patent: 2749928 (1956-06-01), Dowsett
patent: 3412858 (1968-11-01), Stone

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