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.

Air separation equipment is an equipment that takes air as raw material, turns air into liquid through compression circulation and deep freezing, and then gradually separates from liquid air through distillation to produce inert gases such as oxygen, nitrogen and argon. There are many forms and types of air separation equipment produced in China.