The horizontal pump is horizontally arranged (the liquid inlet pipe is lower than the liquid discharge pipe), and heating gas (set behind the pump or in front of the filter in front of the pump to prevent impurities from entering), seal gas, liquid discharge exhaust valve (discharge at low place and exhaust at high place) and return pipeline (return liquid inlet phase) are required.

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.