Decanter Centrifuge

A three-phase centrifuge consists of several important components: a semi-cylindrical and semi-conical bowl, a screw conveyor of the same shape and a centripetal pump for adjusting the liquid level. The pressed liquid is pumped into the centrifuge. Under the action of huge centrifugal force, the material is divided into three layers along the drum wall. The outermost layer is solid residue, then protein water, and the innermost layer is fish oil. The solid slag is pushed to the solid slag discharge end by the screw conveyor in the center of the drum, and then mixed with the pressed cake and then enters the dryer.

The height of the fish oil layer changes with different materials. By adjusting the centripetal pump, the separation of protein water and fish oil is realized. In actual operation, it is difficult to achieve perfect separation of oil and water, so when adjusting the centrifugal pump, it will be over-adjusted to ensure the purity of a certain phase.

For example, if we want the oil to contain as little water as possible, we only need to place the liquid inlet of the centrifugal pump below the oil-water separation layer. Conversely, if we want the protein water to contain as little oil as possible, we only need to place the inlet position of the centrifugal pump above the oil-water separation layer.