Apparatus for the separation of a gas component from a gas mixture by freezeout

US4668261A · kind A · utility

Assignee

• Kernforschungsanlage Lulich Gesellschaft mit beschrankter Haftung · DE

Inventors

• Johann Chatzipetros · Frechen, DE
• Helmut Hackfort

Key dates

• Filing date: Jun 17, 1985
• Grant date: May 26, 1987
• Expiry date: Jun 17, 2005

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F25J2270/904
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A cold trap for the removal of a component from a gas mixture includes a cooling coil, made up of cooling sections of highly thermally conductive material and intermediate sections of low thermal conductivity, and a heating coil arranged for controlling the inlet temperature to equal the saturation temperature of that component in the gas mixture, its outlet temperature to equal the saturation temperature at a desired residual concentration of the component in the mixture and the temperature of cooling surfaces between the inlet and the outlet at a temperature which substantially falls linearly from the inlet temperature to the outlet temperature. The cooling surfaces extend generally perpendicular to the principal gas flow direction and the residence time of the gas is comparatively large so that the gas is practically at the temperature of the cooling surfaces at all times and nucleation in the gas spaces which might lead to obstruction of the flow passages is precluded.