METHOD AND PLANT FOR AIR SEPARATION BY METHOD OF CRYOGENIC DISTILLATION

摘要

FIELD: machine building.SUBSTANCE: air separation plant contains the first element (A) of elongated shape that has the column of average pressure (1) of double column, on which there located are the reboiler-condenser (5) and subsidiary column (2) containing, at least, one theoretical step that represents the bottom part of low pressure column; the second element (B) of elongated shape that forms the rest part of low pressure column; means (11) of air movement from main exchange line to average pressure column and reboiler-condenser (6) located above the first and the second element of elongated shape; means of fluid movement from average pressure column reservoir (13) to after-cooler and then to the second element of elongated shape and/or means of fluid movement from average pressure column top part to after-cooler and then to the second element of elongated shape; means of gas movement from the top part of the second element of elongated shape to after-cooler.EFFECT: use of invention will allow more effective filling of cold casing volume.1 dwg