Abstract: Apparatus for gas dehumidization especially for gases where the diameters of the droplets are smaller than 10 micrometers. Layers of vertically arranged blades protrude from a tubular surface coaxial with a housing, and are shaped along an involute line with equal pitch. On the blades rests a cover with a cone having its vertex directed towards the gas inlet. A stream of gas to be dehumidified is introduced into the interior of the plant and directed through the cone radially into passages between the blades where due to the momentum transverse to the gas streams, the liquid droplets become separated from the gas.