Pre-cleaning of grain by weight
A clean crop without impurities and dust is much easier to store safely. By minimizing the content of dust in the grain, less dust will be released to the surroundings in the grain storage.
An efficient way to remove dust and light material from the grain is to pass the material through an aspirator type of cleaner. In the aspirator, the grain drops down through an upgoing air stream which is adjusted to carry up the light materials and let the grain drop down through the bottom outlet.
The aspirator cleaning function is driven by a blower which also conveys the light materials through pipe to the discharge point, i.e. a cyclone.
We recommend constructing the conveying system for the grain storage in such a way that the grain passes through the aspirator both during intake and during emptying of the storage.