公开(公告)号：US5629208A

公开(公告)日：1997-05-13

申请号：US463741

申请日：1995-06-05

申请人： Bernard Darredeau ,  Amelie Jacomet

发明人： Bernard Darredeau ,  Amelie Jacomet

IPC分类号： F25J3/04 ,  F25J3/00

CPC分类号： F25J3/0486 ,  F25J3/04412 ,  F25J2220/52 ,  Y10S62/913 ,  Y10T436/115831 ,  Y10T436/12 ,  Y10T436/17 ,  Y10T436/177692

摘要： A method for the control of the operation of an installation for the separation of air by cryogenic distillation comprising a double distillation column wherein the top of a medium pressure column and the base of a low pressure column are thermally interconnected by a vaporizer-condenser supplied with liquid oxygen from a bath of liquid oxygen in the base of the low pressure column. Liquid oxygen from the bath is continuously tested to detect the content of nitrous oxide in the bath, and upon the detection of a fall in the nitrous oxide content of the bath when the installation is operating under equilibrium conditions, the flow of liquid oxygen to the vaporizer-condenser is increased to raise the detected nitrous oxide content of the bath. But when the detected nitrous oxide level falls, then either a liquid oxygen purge line is opened farther, or else the operating time or pressure of switching adsorbers in the air supply is changed.

摘要翻译： 一种用于控制用于通过低温蒸馏分离空气的装置的操作的方法，其包括双蒸馏塔，其中中压塔的顶部和低压塔的底部通过被供应的蒸发器 - 冷凝器热互连 来自低压塔底部的液氧浴的液氧。 连续测试来自浴液的液氧，以检测浴中一氧化二氮的含量，并且当安装在平衡条件下操作时检测到浴的一氧化二氮含量的下降，液氧流向 蒸发器 - 冷凝器增加以提高检测到的一氧化二氮含量。 但是，当检测到的一氧化二氮水平下降时，则将液氧吹扫管线打开得更远，否则空气供应中的开关吸附器的操作时间或压力发生变化。