Liquid Air Separation Unit
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Liquid Air Separation Unit
The products of the all-liquid air separation unit can be one or more of liquid oxygen, liquid nitrogen and liquid argon, and its principle is as follows:
After purification, the air enters the cold box, and in the main heat exchanger, it exchanges heat with the reflux gas to reach a near liquefaction temperature and enters the lower column, where the air is preliminarily separated into nitrogen and oxygen-rich liquid air, the top nitrogen is condensed into liquid nitrogen in the condensing evaporator, and the liquid oxygen on the other side is evaporated. Part of the liquid nitrogen is used as the reflux liquid of the lower column, and part of it is supercooled, and after throttling, it is sent to the top of the upper column as the reflux liquid of the upper column, and the other part is recovered as a product.
