Decanter Centrifuge

What is a Decanter Centrifuge?

Decanter centrifuges are also known as horizontal bowl centrifuges, centrifugal decanters or simply decanter machines. They are primarily used for separation of liquids from high amounts of solids. Decanters Centrifuges can separate over 50% (v/v) solids from liquids on a continuous basis.

Typical industrial decanter centrifuge applications include Crude Oil Tank Bottoms; Waste Oil; Hemp Biomass Separation; Industrial Waste-water; Sludge Dewatering; Fish Meal; WVO/UVO De-Sludging; Paint Sludge; Rendering etc. etc.

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How does a Decanter Centrifuge Work?

A decanter centrifuge separates solids from one or two liquid phases in one single continuous process. This is done using centrifugal forces that can be well beyond 3000 times greater than gravity. When subject to such forces, the denser solid particles are pressed outwards against the rotating bowl wall, while the less dense liquid phase forms a concentric inner layer. Different dam plates are used to vary the depth of the liquid or ‘the pond’ – as required.

The separated sludge is continuously removed by the screw conveyor, which rotates at a differential speed to the bowl. As a result, the solids are gradually “ploughed” out of the pond and up the conical “beach”. The centrifugal force compacts the solids and expels the surplus liquid. The dried solids then discharge from the bowl. The clarified liquid phase or phases overflow the dam plates located at the opposite end of the bowl.

Decanter Centrifuge

Why Dolphin Centrifuge?

Dolphin Centrifuge has been dealing with Alfa Laval & Sharples decanters for over 30 years. We have an active stock of over 50 Decanters at our factory in Warren, MI. We have in-house capability to build complete modular decanter centrifuge packages including Control Systems, Fluid tanks, Pumps, Sludge Augers, Feed & Return Pumps etc.

As part of decanter rebuild process, we routinely apply tungsten carbide hard-surfacing to the conveyor, install carbide tiles, install stellite sludge-port liners etc.  Optional accessories such as VFD back-drives are available for auger speed control, Over-torque sensors, Pillow-block temperature sensors, Main-drive / back-drive interlocks, Main-drive current monitors are routinely installed based on customer specifications.

Our current Alfa Laval stock includes: Alfa Laval NX418 2-phase; Alfa Laval NX418 3-phase; Alfa Laval NX314 2-phase; Alfa Laval NX309 3-phase decanters.

We also have: Sharples P660; Sharples P3000; Sharples P3400 and Sharples P5000 Decanters.