Dewatering Centrifuges

Inside the decanter

Inside the machine, a bowl spinning at high speed multiplies gravity thousands of times, slinging solids against the bowl wall while a scroll conveyor, turning at a slightly different speed, ploughs them continuously toward the discharge end. Centrate exits the opposite end over adjustable weir plates. Because separation force comes from rotation rather than screen area, a decanter handles feeds that blind filters and belts: fine particles, oily sludges, slurries with variable solids content, streams that change character by the hour.

Who buys these machines

The duty environments tell you who buys these. Pulp and paper mills run them on primary and secondary sludge around the clock. Oil and gas operations use them on drilling mud, slop oil and produced-water solids. Municipal plants specify them where biosolids volumes are large enough that cake dryness dominates the operating budget. All three share the same requirements: continuous duty, tolerance for abrasive feed, and a machine that does its work inside a compact enclosed casing rather than an open hall, with no aerosols and no spray.

Wear, and the tungsten carbide answer

Wear is the honest cost of centrifugal dewatering, and the design answer is tungsten carbide. Our machines carry wear-protected tungsten carbide tiles on the scroll flights, the component that takes the abrasion, so rebuild intervals are measured in years of continuous service rather than months. Variable-speed scroll drives let an operator, or the control system, trade cake dryness against centrate clarity in real time as the feed changes, which is the practical difference between a machine that is tuned and a machine that is merely running.

Try before you commit

Commitment does not have to come first. Rental and pilot units are available, and for a difficult sludge the sensible path is often a two-week trial on your actual feed before anyone signs for a permanent installation. The 90 monthly Canadian searches for dewatering centrifuges are mostly engineers doing exactly that comparison. Send us your sludge type, feed solids and throughput, and a process engineer returns a sized configuration, budget price and delivery timeline for your site, anywhere in Canada. Installation support and commissioning are quoted per project, and vibration monitoring can be included in the scope so bearing wear announces itself on a trend line instead of on a night shift.