This system was conceived and designed to obtain a homogeneous quantity of product of the same caliber which can subsequently be treated by the shelling machines.
The system is designed to load walnuts in bulk and return them clean, bagged and calibrated based on a nominal size that varies from 18 to 30 millimetres.
The raw nuts are cleaned of foreign bodies and subsequently passed through cylinders equipped with “tube” shaped openings which ensure that the product does not rotate around itself, allow for homogeneous and uniform calibration and finally ensure limited variability in the size of the nut. walnut within the same caliber class.
Subsequently the nuts are conveyed towards a continuous steam oven, a tunnel, complete with loading hopper with preheater. The heat is taken from the biodigester or gasifier as well as the electrical energy needed for the system.
It follows the automatic shelling line which allows you to shell and separate the calibrated nuts into different sizes.
After shelling, the cashew nuts are automatically separated from the shells, ready for the next step of drying and peeling.
The drying is carried out by means of a continuous dryer, second tunnel, which consists of one or more modules, based on the desired drying capacity needs. At the end of the drying system, a last module is placed with the opposite purpose to the previous ones: it cools the cashew nuts.
The nuts are sent to the cylindrical geometry peeler. Inside they come into contact with the springs, mounted on an eccentric shaft, which during rotation delicately carry out the peeling while preparing the nut for the subsequent action of the compressed air. The cylinder of the peeler is perforated to facilitate the entry and exit of the nuts, while a hopper discharges the peels thus detached. High temperature compressed air remove the head from the nut. The cashews are finally vacuum packaged while the shells and skins are sent to the CNSL extraction process.
