ANNULAR COLUMN FOR CRYOGENIC RECTIFICATION

摘要

PURPOSE: An annular column is provided to rectify by providing a column system that the operation cost of a column is reduced and a space needed for a column is reduced. CONSTITUTION: The annular column is composed of: a cylindrical main column wall(70) forming a first column area(72); an annular column wall separated to the radial direction from the main column wall to separate a second column area(73) between the main column wall and the annular column wall; a piece for passing fluid to the first column area; a piece for re-collecting the fluid from the first column area; and a piece for passing the fluid to the second column area and re-collecting it from the second column area.