Patent ID: 8252079

Claim:
Separating device for separating liquid or solid particles from an aerosol gas stream, which comprises an impactor, which has a perforated plate adapted for the aerosol to flow against it, and an impact plate which extends approximately parallel to the perforated plate and is arranged at a distance behind the perforated plate in the flow direction, the side of the impact plate that faces the perforated plate comprising a separating layer with an open structure; wherein the perforated plate is provided on its side that faces the impact plate with a plurality of spacer elements bearing against the region, against which the aerosol stream flows, of the side of the separating layer that faces the perforated plate; wherein the impact plate is at least substantially gas-impermeable in the flow direction of the aerosol stream, at least in its region lying in this direction behind said region of the separating layer; wherein the height of the spacer elements measured in the flow direction, the support surfaces formed by the spacer elements for the separating layer, and the number and arrangement of the spacer elements are selected in dependence upon the material of the separating layer such that it is ensured that the holes of the perforated plate remain free from material of the separating layer also during operation of the separating device, and the separating layer is held by the spacer elements at such a distance from the perforated plate that flow paths for the gas stream result between the perforated plate and the separating layer, which run approximately parallel to the perforated plate; and wherein the impactor comprises elements in the form of a plurality of projections as fixing elements provided on at least one of the perforated plate and the impact plate, protruding from this and penetrating into the separating layer for preventing displacement of the separating layer inserted between the perforated plate and the impact plate in the flow-through direction of the flow paths.