Working of Disc Bowl Centrifuge at Alfa Laval

The FEQX separators are of the nozzle bowl type. The design makes them ideal for separating micro-organisms with high cell content and with or without solids impurities in the feed. The FEQX separators also feature peripheral nozzles, but in addition it is designed to recirculate part of the concentrate through the nozzles to compensate for fluctuations in feed concentration and handle very low concentrations of feed solids.
The feed containing the liquid and the solids is introduced to the rotating centrifuge bowl from the top via a stationary inlet pipe, and is accelerated in a distributor before entering the disc stack. Separation takes place between the discs. The light phase moves through the disc stack towards the centre of the bowl, and is pumped out under pressure by means of a built-in paring disc. The yeast is collected at the bowl periphery and continuously discharged through the nozzles. Filler pieces prevent build-up of the solids between the nozzles.