Air separation equipment​ is a device that uses air as raw material, converts the air into liquid state by means of compression cycle deep freezing, and then gradually separates it from liquid air to produce inert gases such as oxygen, nitrogen and argon through rectification.

The adsorbers used in the purification system include vertical axial flow, horizontal double bed and vertical radial flow. Vertical axial flow is mainly used for supporting air separation equipment below 10000 grade (with a diameter of 4.6m). The bed thickness is 1550 ∽ 2300mm. It can be arranged in double layers and single layers. The vertical axial flow adsorber has the best air distribution.