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2. 发明申请

WO2014067662A2 PROCESS FOR THE LOW-TEMPERATURE SEPARATION OF AIR IN AN AIR SEPARATION PLANT AND AIR SEPARATION PLANT 审中-公开
标题翻译：方法在空气分离系统和空气分离系统，空气的低温分离
公开(公告)号：WO2014067662A2
公开(公告)日：2014-05-08
申请号：PCT/EP2013003289
申请日：2013-10-31
申请人： LINDE AG
发明人： LAUTENSCHLAGER TOBIAS
IPC分类号： F25J3/04
CPC分类号： F25J3/04466 , F25J3/0429 , F25J3/04296 , F25J3/04303 , F25J3/04309 , F25J3/04872 , F25J2200/08 , F25J2215/40 , F25J2235/50
摘要： The invention relates to a process for the separation of air (AIR), in which cooled air (AIR) at a first separation pressure is separated in a first separation column (S1) at least into a nitrogen-enriched top fraction and an oxygen-enriched bottom fraction, and in which further cooled air (AIR) in a mixing column (M) is liquefied at a mixing column pressure by means of direct heat exchange against a liquid oxygen-enriched stream, which is at least partly obtained from the oxygen-enriched bottom fraction from the first separation column (S1), to form a mixing column bottom fraction. According to the invention further cooled air (AIR) at a second separation pressure is likewise separated in a second separation column (S2) into a nitrogen-enriched top fraction and an oxygen-enriched bottom fraction, wherein the nitrogen-enriched top fraction from the second separation column (S2) is at least partly cooled by using the mixing column bottom fraction from the mixing column (M). To this end, the nitrogen-enriched top fraction from the second separation column (S2) is at least partly guided through the liquefaction chamber of a top condenser (E2) of the second separation column (S2), which is constructed as a condenser evaporator and the evaporation chamber of which is operated at an evaporation chamber pressure which lies between the mixing column pressure and a third separation pressure, at which the liquid oxygen-rich stream is obtained in a third separation column (S3), and in which at least part of the mixing column bottom fraction from the mixing column (M) is fed in in liquid form at the evaporation chamber pressure. The invention further relates to a corresponding air separation plant.
摘要翻译：本发明提出了一种用于空气分离（AIR），其特征在于，在第一分离柱（S1）的第一分离压力的冷却空气（空气）至少分离成氮气富集的头馏分和富氧塔底馏分，和一个处理（在所述进一步冷却的空气 AIR）在混合列（M）与由针对至少回收部分从所述第一分离柱（S1）的富氧塔底馏分的液体富氧流的直接热交换的混合塔压力，被液化到混合塔的塔底馏分。它被创造性设想，在第二分离柱（S2）在第二分离压力在至少一个氮富集头馏分和富氧底部馏分也被分离，进一步冷却空气（空气），其中所述第二分离柱（S2）至少部分地与所述的富氮顶部馏分从混合塔（M）混合塔底馏分被冷却。为此，第二分离柱的富氮顶部馏分（S2）被引导至少部分地通过构造为冷凝器 - 蒸发器塔顶冷凝器的第二分离柱的（E2）（S2），其蒸发空间在蒸发室压力下操作，这是在混合塔的压力，第三分离压力之间的液化空间，其中，所述液体富氧流进第三分离柱（S3）中获得，并且其中从混合塔（M）混合塔底馏分的至少一部分在所述蒸发室供给压力液体。相应的空气分离装置（10）也是本发明的主题。

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