Density sorter
A density sorter (other names: cleaner, vortex centrifuge , pipe centrifuge or hydrocyclone) is used in the paper industry to remove contaminants. The water mixture has a density of about 1.3 to 1.4 g / cm³. For wood splinters, their density is less than 1 g / cm³, sand (approx. 2.4 g / cm³) and small pieces of metal have a higher density than the mixture. In this way, these contaminants can be separated by means of their density differences, either using several sorters connected in series (e.g. with a downstream pressure sorter ) or using a phased operation at different speeds.
In industrial potato processing, stones are separated from delivered potatoes with the help of a density sorter. The specifically heavier stones are concentrated in the water below, the specifically lighter potatoes tend to swim above.
Density sorters belong to the processing machines .
functionality
The mixture is fed through a tangential inlet at the top into a pipe that tapers downwards. The speed depends on the pressure difference between inlet and passage. The shape creates enough centrifugal force to separate the individual components. The components are then discharged through various openings.
Material flows: inlet ( black ), accepted material ( ocher ) and reject material ( red )
Material flows: inlet ( black ), accepted material ( ocher ) and reject material ( red )
Material flows: inlet ( black ), accepted material ( ocher ), heavy dirt rejects ( red ) and light dirt rejects ( gray )
