Device for separation and removal of impurities from granular material

A device for separation and removal of light impurities from granular material, comprising:

• a vertical cylindrical body, in an upper part of which is located a motor-driven fan that sucks air and an outlet channel for light impurities, below which axially mounted a feed channel connected to a container of granular material, and in a lower part of the body is axially located a cylinder with an outer diameter smaller than an inner diameter of the body;
• and
• a centrifugal guide in a form of an axial member on a surface of which are mounted directing elements with respective ends of the directing elements being pointed towards the inner wall of the cylinder, said centrifugal guide being located under an outlet of the feed channel, wherein
• directing plates are mounted below the centrifugal guide, on the inner wall, evenly spaced from each other, with respective ends of the directing plates being pointed towards the axis of the device,
• a chute for purified material is disposed between the body and the cylinder, the chute having two symmetrical troughs connected together at the top, wrapping up spirally around the cylinder,
• a plurality of openwork hinder plates are fixed to an outer surface of the feed channel, in various transverse planes in each plane, with respective ends of the openwork hinder plates being pointed obliquely upwards towards the inner wall of the body, and
• a multi-conical reducer is axially located inside the feed channel, above the outlet of the feed channel, the multi-conical reducer slowing down the gravitational flow of the granular material.