公开(公告)号：US6155078A

公开(公告)日：2000-12-05

申请号：US136965

申请日：1998-08-20

申请人： Kazuhiko Miyashita ,  Tadatoshi Aida

发明人： Kazuhiko Miyashita ,  Tadatoshi Aida

IPC分类号： F25J3/04 ,  F25J1/00

CPC分类号： F25J3/0486 ,  F25J3/04157 ,  F25J3/04218 ,  F25J3/04254 ,  F25J3/044 ,  F25J3/04412 ,  F25J3/04793 ,  F25J3/04836 ,  F25J2200/74 ,  F25J2205/02 ,  F25J2210/42 ,  F25J2210/50 ,  F25J2245/40 ,  F25J2250/02 ,  F25J2250/40 ,  F25J2250/42 ,  F25J2250/50 ,  F25J2270/90 ,  F25J2290/62 ,  Y10S62/905 ,  Y10S62/913

摘要： In an air distillation apparatus having a main heat exchanger 7 for cooling down feed air, a rectification column 9S comprising a rectifying portion 13 for separating the thus-cooled feed air to an oxygen-enriched component and a nitrogen component and a condenser 35S for partially condensing the latter, and a liquid nitrogen storage tank 31S for supplying liquid nitrogen by way of a supply valve V3, anda transport route 18 for transporting an oxygen-enriched liquid flowing down from said rectifying portion 13 to the bottom into said condenser 35S, the said oxygen-enriched liquid is not reserved at the bottom of the column. Control means include a liquid level detection means for detecting the height of a liquid level of said oxygen-enriched liquid reserved in said condenser 35S; and a control means LIC for controlling the opening degree of the supply valve V3, on the basis of the output therefrom, so that the liquid level of said oxygen-enriched liquid reserved in said condenser is kept almost at a set level.

摘要翻译： 在具有用于冷却进料空气的主热交换器7的空气蒸馏装置中，提供精馏塔9S，该精馏塔9S包括用于将如此冷却的进料空气分离成富氧组分和氮组分的精馏部分13S和部分冷凝的冷凝器35S 冷凝后者，以及用于通过供给阀V3供给液氮的液氮储存箱31S和用于将从精馏部13向下流动的富氧液体输送到冷凝器35S的输送路径18， 所述富氧液体不保留在塔的底部。 控制装置包括液位检测装置，用于检测在所述冷凝器35S中保留的所述富氧液体的液面高度; 以及根据其输出控制供给阀V3的开度的控制装置LIC，使得保留在所述冷凝器中的所述富氧液体的液位几乎保持在设定水平。