Rotor film column for making contact between gas and liquid

Claim 1

A rotor film column for making contact between a gas and a liquid comprising in combination; a housing; branch pipes for feeding the gas into the bottom part of said housing and for removing the gas from the top part of said housing; branch pipes for feeding the liquid into said housing and for removing the liquid therefrom; a vertical shaft rotatably mounted in said housing; contact stages secured on said shaft at a certain distance one above another; bands forming said contact stages, said bands being bent in the form of spirals diverging from said shaft; edges of said bands flanged towards said shaft; corrugations on said bands arranged substantially across these bands; annular pockets for collecting the liquid thrown down from said contact stages, said pockets being secured on the inner wall of said housing; overflow trays arranged in the space between said contact stages; receiving ends of said overflow trays communicating with said annular pockets for collecting the liquid flowing from the contact stages located above said overflow trays; discharge ends of said overflow trays located above the contact stages underlying these overflow trays.