Vortex grit collector with mechanical conveyor for grit removal

Details Vortex grit collector with mechanical conveyor for grit removal Vortex grit collector with mechanical conveyor for grit removal

2006-06-27

2006-06-27

Reifsnyder, David A. (Department: 1723)

Liquid purification or separation

Processes

Separating

C210S787000, C210S806000, C210S257100, C210S304000, C210S523000, C210S532100, C210S534000, C134S132000

Reexamination Certificate

active

07067065

ABSTRACT:
A grit removal device, as may be used in a water or wastewater treatment plant, has a vortex grit collector and a mechanical conveyor for removing the grit from the collector. The grit collector includes a tank having an influent channel and an effluent channel, and a stirrer or other mechanism for inducing vortex flow within the tank. The tank has a sump located beneath it, wherein grit settles. A mechanical conveyor, such as a rotating screw, removes and dewaters grit from the sump to an exterior location. The conveyor is preferably offset from the horizontal. The invention also includes a method of grit removal employing the device.

REFERENCES:
patent: 4767532 (1988-08-01), Weis
patent: 5569379 (1996-10-01), Schloss
patent: 5591348 (1997-01-01), Felder et al.

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