The air separation unit is to separate oxygen, nitrogen, argon and other necessary gases from the air.
Air is mainly composed of oxygen and nitrogen, which are uniformly mixed together in the gaseous state. In addition to oxygen and nitrogen, there are also argon, neon, helium, krypton, xenon and other gases in the air. These gases have stable chemical properties and are rarely contained in the air and are not easily available in nature. Therefore, they are often called rare gases or inert gases, also known as "gold gas". The air also contains a small amount of water, carbon dioxide, acetylene and other gases. Although the amount of these impurity gases is not large, the harm is not small. The water and carbon dioxide are first frozen into solid particles before air liquefaction. In the air separation unit, they will block the valves, pipes and sieve holes of the tray, wear the machine, affect heat transfer, and make the air separation unit unable to operate normally. Acetylene is one of the main causes of explosion accidents in the air separation unit. Therefore, great attention must be paid to it in the operation of the air separation unit and it must be eliminated before liquefaction.
After the air is liquefied, due to the different boiling points of oxygen, nitrogen and other components that make up the air, various components such as oxygen and nitrogen can be obtained after rectification in the tower.
DEAR air separation produces large, medium and small air separation equipment, high purity oxygen, nitrogen and argon equipment, low purity oxygen and oxygen equipment, energy-saving air separation equipment, liquid air separation equipment, liquefaction equipment, natural gas purification, natural gas liquefaction (LNG), etc.
