Air separation plants separate atmospheric air into its main components, usually nitrogen and oxygen, and sometimes argon and other rare and inert gases.The most common method of air separation is fractional distillation. Cryogenic Air Separation Units (ASUs) are used to supply nitrogen or oxygen an

Pressure swing adsorption separates oxygen or nitrogen from air without liquefaction. The process operates at ambient temperature; the zeolite (molecular sponge) is exposed to high-pressure air, which then releases the air and releases an adsorbed film of the desired gas. Compressors are greatly red

Cryogenic large-scale air separation equipment​ is referred to as "air separation equipment", which uses air as raw material, converts air into liquid state by means of compression cycle deep freezing, and then gradually separates it from liquid air through rectification to produce oxygen, nitrogen and Inert gases such as argon.

The air cooling tower of precooling system has two forms: closed circulation (the air cooling tower is divided into upper and lower sections, and the chilled water circulates between the upper section of the air cooling tower and the water cooling tower) and open circulation (into the circulating water system). The closed circulation is mainly used in chemical plants with poor water quality, which needs to supplement fresh water and chemicals