Special horizontal solid bowl centrifuge for continuous 3-phase separation of solids with different densities from liquid phase. Capacities to 2,000 kg/h solids for plastic recycling, depending on the properties of the raw material.
The solid-liquid mixture is conveyed through the centrifuge feed pipe and inlet ports in the scroll body into the bowl and is accelerated to the bowl speed. Centrifugal force causes the solids which are heavier than the carrier liquid to settle against the bowl wall. The scroll conveys the deposited layer of heavy solids toward the conical bowl section, over the drying zone and ejects them through ports into the stationary solids housing and down the discharge chute. The solids which are lighter than the carrier liquid float and are conveyed floating particles have reached the inner collection cone, scroll flights, wound in the opposite direction to those conveying sedimented solids, convey the lighter solids across a drying zone to the exit ports.
The liquid is skimmed off and discharged under pressure via an impeller at the cylindrical end of the bowl. The liquid may be recycled and pumped back into the process.