Grit Classifier Screw | Shaftless Screw Conveyor | LS-W Spiral Conveyor

Working Principle

During the Screenings Volume Reduction process, wet screenings drop into the inlet and get pushed hard by the spiral blades. They first hit a spray-washing zone where surface grease and organics are washed off. Then, the material enters the pressing zone. As the pitch narrows, the squeezing force spikes, driving water out through the mesh and leaving a dry cake at the outlet.

Application Fields

1.Landfills: compacting intercepted plastic films to cut volume.
2.Underground pump stations: compacting wet trash right on-site to skip frequent hauling.
3.Farmers' markets: source reduction for produce scraps and packaging.
4.Ports: processing shipboard garbage to make transport easier.

FAQ

Q1: How much can the volume be reduced?
A: It really depends on what's in the screenings. Generally, after washing and high-pressure pressing, the volume drops by 50% to 70%, and the moisture content goes way down. This makes a huge difference in cutting transport trips and landfill fees.

Q2: Will the machine break if hard objects get in?
A: The spiral shaft and screen are built from high-strength stainless steel or wear-resistant alloys, so they're pretty tough. Still, to keep iron chunks or rocks from wrecking the spiral, it's a good idea to put a protective baffle at the inlet—or just rely on the unit's overload protection to trip and alarm.

Q3: Where does the wash water end up?
A: The organics and dirty water (filtrate) drain through a bottom pipe and go right back to the plant's inlet channel or equalization tank, re-entering the treatment cycle. No secondary pollution.