Abstract: A gaseous stream scrubber includes a cylindrical housing having a curved outer wall for confining therewithin a gaseous stream to be scrubbed. A flow inlet communicates with the housing and introduces the polluted gaseous stream into the housing, the inlet having an axis of flow tangentially placed with respect to the cylindrical housing central axis so that the inflowing gaseous stream creates a circular flow path which spins within the cylindrical housing and about the central axis of the cylindrical housing. A first flow outlet discharges gas from the housing. A centrally placed vortex tube having a bore is centrally positioned in the housing so that the circular flow stream surrounds the vortex tube during operation. In the preferred embodiment, the vortex tube is cylindrical and has a central axis which coincides with the central axis of the cylindrical housing. The vortex tube includes an outlet for discharging gaseous flow from the housing and through the bore of the tube.