Cryogenic separation method for gas, involves using distillation columns and absorption column with heat and/or material exchange section between descending liquid and mounting gas, where section has specific parameter

摘要

#CMT# #/CMT# The method involves using distillation columns (K02, K03) with undulated-crossed structured trim and/or an absorption column (K01) with undulated-crossed structured trim with a heat and/or material exchange section between descending liquid and mounting gas. The section has a parameter (S) ranges between 0.00150 and 0.01500, where S is equal to Tx m/ sigma in which T is a shearing voltage at an interface between liquid and vapor, m is thickness of a liquid film flowing on the trim and sigma is superficial voltage at liquid/vapor interface. #CMT# : #/CMT# An independent claim is also included for an instillation adapted to be used in a cryogenic separation method. #CMT#USE : #/CMT# Method for cryogenic separation of gas. #CMT#ADVANTAGE : #/CMT# The method permits to optimize separation capacity and reduce diameter of the columns for a given separation capacity, thus permitting to reduce investment costs of the columns and increase flexibility of an apparatus during starting and operation change phases. The parameter permits to reduce risk of foaming at an interface between two trim bodies, and ensures reliable operation of the columns in established speed in an operating speed. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a schematic view illustrating a method for washing methane. K01 : Absorption column K02,K03 : Distillation columns.