Air separation unit operation rules

All posts in the air separation workshop shall abide by the operation rules of air separation unit from start-up to shutdown, so as to ensure safe production. At the same time, pay attention to the physical and chemical properties of all gases, liquids and solids in daily maintenance to ensure the normal production of oxygen, nitrogen and argon and meet the production needs.

Faq of Air separation unit operation rules

Brief principle of separating air by distillation

The air is mainly composed of 78.03% nitrogen and 20.93% oxygen and other gases. Air separation is to cool the air to a certain low temperature firstly and liquefy it into liquid air. Reuse two liquids oxygen and nitrogen with different boiling points (At atmospheric pressure, the boiling point of oxygen is - 183.98°C and that of nitrogen is - 195.8°C), separation is carried out in an air fractionator equipped with sieve plates. The air separation column is also called distillation column. Air distillation column can be divided into single-stage distillation column and double-stage distillation column, and single-stage distillation column can only produce one kind of pure product. Two stage distillation column is used to produce high purity nitrogen and oxygen in common air separation unit.

Oct 30, 2020