Grit and Sand Classifier
Grit Classifier SC
Description and Working Principle
The SC Grit Classifier is a stand alone unit designed to remove small particulate solids, grit, sand and fines from waste water elevating and de-watering the solids prior to disposal. It is fed either by an air lift pump, pump or pump and cyclone washer/concentrator.
Grit laden water is fed via the flanged inlet of the integral decanting hopper where the solids are allowed to settle out. Special baffle plates and inlet/outlet arrangements can be used to remove any remaining floating matter. The settled solids are removed from the hopper by a low speed conveying screw. Once elevated above the unit’s water level, the solids are further de-watered and transferred to a convenient discharge height.
Performance and Technical Features
- min. 8 l/s
- max. 360 l/s
Solids output: 0.08 dm³/s
Efficiency: 90 % separation of sand with grain size as small as 200 micron
– Municipal waste water treatment plants for separation and de-watering grit coming from the sedimentation basin
– Industrial plants in which sand or grit has to be de-watered
Water to be conditioned passes through the charging inlet P and is let into the decantation hopper, where the sedimentation of solid particles takes place. The low speed of screw rotation allows Sedimentation and discharge at C of dewatered material. Treated water comes out of the discharge spout Q.
Hopper: Made from stainless steel and designed to avoid material blockages.
Flight: Made from heavy duty sections of wear resistant carbon steel.
Trough: Made from stainless steel, lined inside with low friction, wear resistant material. The design of the liner allows for easy replacement.
- Baffle box
- Discharge chute
- Additional material removal screw at discharge level
- Variable speed drive
- Steel support structure
- The unit can be manufactured from stainless steel on request
Advantages and Innovative Features
- Shaftless spiral
- Absence of bearings
- Low speed
- Low installation cost