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发明公开
CN1436995A 空分装置中回收放空的氧气、氮气、空气的方法 失效 - 权利终止

空分装置中回收放空的氧气、氮气、空气的方法
摘要：
本发明提供了一种空气分离制备氮气和/或氧气时对放空的氮气和/或氧气的回收方法。本发明利用空分装置的备用膨胀机，再增加一台换热器(做为液化器)，再用一些管线、阀门等将前述的膨胀机、换热器等组成一个系统，利用来自空分装置的主换热器中部抽出的空气(简称中抽气)、经压缩净化冷却后得到的放空带压空气或经换热器冷却的放空带压氮气经空分装置备用的膨胀机膨胀后做制冷工质，在换热器中将放空带压氮气或放空带压氧气液化成液氮或液氧，还可通过控制膨胀机出口气的温度，使其出口的冷空气流或冷氮气流部分液化，并用液氮/液空存贮罐收集所得的液空或液氮，从而达到从空分装置中回收放空的氧气、氮气、空气的目的。
摘要（英）：

The present invention is method of recovering oxygen and nitrogen during air separation. One system is constituted with the spare expander of air separator, one increased heat exchanger, some pipes and valves. Air pumped by the main heat exchanger in the air separator, exhausted and pressureized air after compression, purification and cooling or exhausted and pressurized nitrogen after cooling inthe heat exchanger is expanded in the space expander and used as cooling work medium, and liquefied in the heat exchanger into liquid oxygen or liquid nitrogen, and the liquid oxygen or liquid nitrogen is collected in the liquid oxygen or liquid nitrogen storage. Meanwhile, the temperature of the exhausted air from the expander may be controlled to liquefy partially the exhausted air or nitrogen.

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