Patent ID: 6957740

Claim:
A cyclone separator comprising: a vertically extending housing with: an upper housing segment, in which is located a separator wheel, which is equipped with a carrier gas/product inlet as well as with a carrier gas/fine grain discharge, a middle housing segment which tapers in conical fashion in downward direction, and in which is located a central built-in element serving for gas/product guidance, extending up into the upper housing segment to a lower end of the separator wheel, a lower opening of the central built-in element being located at a level of the middle housing segment, a lower housing segment which is equipped with a coarse grain discharge and with at least one pipe connection for secondary air supply, a cone-shaped built-in element, having a shape of a downwardly expanding cone and being attached to the central built-in element below the lower opening of the central built-in element, such that in the region of the lower opening of the central built-in element a reversal in air flow direction takes place, a lower edge of the cone-shaped built-in element forming together with the housing a slot in which takes place a counter flow separation.