Intensifiers include organic matter that differs from lower density grains and the seeds of some weeds, for example, Wild Oats, parts of basak stems, etc. he'll separate it. The main working body of concentrators are sieves that release into the horizontal plane at an angle of 15 degrees. When the grain mass moves through the sieves under ventilation conditions with an increased flow of Air, intense loosening and self-separation occur in the different components of the mixture. As a result, grains and impurities of the same size and different density are concentrated in different layers: heavy impurities collapse into the sieve, and light impurities float on the grain surface. Sifting the layered grain mixture through sieves with various hole sizes allows not only the separation of small and light matter, but also the separation of refined grain according to intensity for subsequent separate cleaning.