Grit Classifier

SF Grit classifier is used for the separation of solids from water and consisting of a funnel-shaped separation tank with a screw conveyor. It can either be a stand-alone unit, can work in conjunction with the Grit Vortex Separator as well. The concentrated grit from the grit vortex separator is airlifted or pumped to the grit classifier for further separation, dewatering and removal.

All types of grit classifiers typically receive a grit slurry from an air lift pump or a grit pump(s). Most classifiers receive a grit slurry that is 1-3% solids mixture. The hopper of a traditional grit classifier is designed for the shortest retention time to allow heavier grit to settle, but not the lighter organic material. The organic material is carried out of the hopper with the grit free overflow and is returned to the plant's process. As the grit is carried up the incline and passes the water line elevation, by rotating a very slow RPM screw conveyor, it allows time for the water to drain back into the hopper. The screw conveyor conveys the grit out of the system and usually into a dumpster to then be hauled to a landfill.

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