The Horizontal Decanting centrifuge (Decanter) has a vast field of applications in various Processes where a liquid and a solid phase have to be continuously separated.
Centrifuge Working Principle:
The centrifuge is fed through a stationary pipe, which is inside a hollow shaft connected to the rotating screw conveyor (scroll.) There it enters a feed compartment and is accelerated through feed slots into the rotating bowl. Once inside the bowl, centrifugal forces accelerate the heavy solids, where they settle on the bowl wall. The lighter liquid will fill the bowl to the level of the effluent dam (weirs).
The conveyor is connected to a gearbox and turns slightly slower than the bowl. Since it is turning slower and the helix is angled toward the small diameter (conical end) thus the solids are then conveyed along the bowl wall to the solids discharge end and discharged there.
The liquid flows around the conveyor and exits over effluent dam located on the large diameter end of the bowl. Lighter Solids, which did not settle to the inside diameter of the bowl (floaters), are carried out with the liquid over the effluent dams.
The Effluent dams are adjustable and control the amount of liquid inside the bowl. The Effluent Dam diameter is normally larger than the solids discharge diameter thus creating a Drying section at the Solids discharge end called a beach. The larger the beach the dryer the solids discharge however this will reduce the amount of liquid inside the bowl.
A larger the amount of liquid usually results in a cleaner effluent.
We can offer many different drive systems to operate decanters form fully automatic Frequency controlled units to a simple one speed setup.
Based on your process requirements we can thus optimize your decanter selection.