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Principle and application of air separation unit

Principle and application of air separation unit
The principle and application industry of air separation unit. Air separation unit is a kind of unit which takes air as raw material, changes air into liquid state by compression circulation deep freezing method, and then gradually separates and produces inert gases such as oxygen, nitrogen and argon from liquid air after rectification. Air separation unit has various forms and is widely used in various industries.
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In the fractionating column, the separation of oxygen and nitrogen is realized through the process of two-stage distillation in the upper and lower columns. The distillation process must have ascending air and downflow liquid, and the main function of the condensing evaporator is to exchange heat between the liquid oxygen returned from the bottom of the upper column and the nitrogen rising from the top of the lower column. Condensing evaporator is an indispensable heat exchange equipment in air separation distillation system. In a sense, condensing evaporator is the link between upper column and lower column. The condensing evaporator is also called "main cooling". In the condensing evaporator, the liquid oxygen returned from the upper column absorbs heat and evaporates the gas oxygen; the rising nitrogen in the lower column is condensed into liquid nitrogen due to heat release. A part of the gas oxygen is sent out of the column as the product, and the rest is sent to the upper colu
Nov 04, 2020
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