SKE Spiraline Grit Washer & Classification - GW

SKE Grit Classifiers offer the solution to removing, washing and dewatering grit and sand, in addition to protecting downstream mechanical equipment and improving the performance and reliability of drainage systems.

Technical Information

Housing and liners are constructed out of high quality AISI 304 stainless steel to ensure years of trouble free operation. Spiral manufactured out of carbon steel with optional AISI 304 stainless steel construction.  There are no intermediate bearings, so no blockages and no bearings in contact with the liquor. Optional extras include full construction out of AISI 316 stainless steel and continuous bagging systems are to receive screenings and abate odour so that the screenings can then be sealed without any personal contact.
 
Operation
Effluent contaminated with grit and organic matter discharges into the top of the hopper. A cyclonic, slow rotational movement is produced and aided by the central stirrer. This movement induces the grit and sand to spiral and settle by gravity to attain > 95 % removal of 0.20 – 0.25 mm grit particles. Flow velocities prevent any suspended organic matter from settling with the minerals. Furthermore, the wash water, aids the breakdown of any remaining organic matter. This scouring process is further enhanced by air agitation and the action of the grit and sand particles abrading against each other. Eventually the grit is conveyed by the screw classifier, washed, dewatered and discharged into a container. Removal of organic matter can achieve > 97 % reduction. Suspended organic matter discharges from the classifier hopper at intermittent frequencies and can either be returned to the flow and onward to secondary treatment or back to the works inlet.
 

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