空气分离，简称空分。是指应用低温冷冻原理从空气中分离出其组分（氧、氮和氩、氦等稀有气体）的过程。一般先将空气压缩，并冷至很低温度，或用膨胀方法使空气液化，再在精馏塔中进行分离。例如当液态空气沸腾时，比较容易挥发的氮（沸点一196℃)先气化，氧则后气化（沸点一183℃)。
空气分离器 [机] air separator ; air trap ; deaerator ; air elutriator
空气分离设备 Air-Separation Equipment ; [机] air separation plant
空气分离装置 ASU ; air separation plant ; air-separating plant
空气分离器风选器 air elutriator ; air separator
空气分离罐 air separating tank
离心空气分离 centrifugal air separation ; whizzer air separation
低温空气分离厂 cryogenic air separation plant
空气分离箱 air separating tank
大型空气分离设备 large scale air separation plant
中型空气分离设备 medium scale air separation plant
该能量系统由利用LNG冷能的空气分离系统和动力系统两个部分组成。
This energy system consists of an air separation system by using LNG cold energy and a combined power generation system.
在空气分离工厂，通过空气液化和蒸馏分离出氮。接着氮作为低温液体回收。
Nitrogen is produced at air separation plants by liquefaction of atmospheric air and separation of the nitrogen by distillation. The nitrogen is then recovered as a cryogenic liquid.
在空气分离工厂、或者通过空气液化和蒸馏分离出氮，或者通过吸附过程生产氮。
Nitrogen is produced at air separation plants either by liquefaction of atmospheric air and separation of the nitrogen by distillation or by adsorption processes.
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