Patent ID: 8048208

Claim:
Method for separation of chalcogens from process waste gases of a process installation comprising: mixing and passing the process waste gases with a carrier gas from the process installation through installation components and/or pipelines under largely isothermal conditions at a temperature above condensation temperature of the chalcogens to a device for separation of the chalcogens, and separating the chalcogens by condensation on an inside wall of a cylindrical housing of the separation device, wherein a temperature below the condensation temperature is maintained in said separation device for separation of the chalcogens from the process waste gases, and wherein chalcogens, condensed on the inside wall of the cylindrical housing, are removed via a cutting edge of an internal cleaning device, accommodated in the cylindrical housing of the device for separation of the chalcogens, and the internal cleaning device comprises a screw with a shape of an Archimedes spiral.