What are the air separation processes?

Air is sucked by an air compressor through a self-cleaning air filter. The cooled compressed air enters the pre-cooling system for cooling and is sent to the molecular sieve purifier to remove harmful impurities such as carbon dioxide and hydrocarbons in the air. Then, the clean air is sent to the cold box, enters the main heat exchanger, and is cooled to the temperature required by the process by the return gas. Part of the cooling air enters the expander for expansion refrigeration. The expanded air enters the splitter tower or the main heat exchanger for reheating. The remaining air enters the separation tower for low-temperature separation. The separated oxygen, nitrogen and waste are reheated by the main heat exchanger and then discharged from the cold box. After the exhaust gas leaves the cold box, it enters the purifier to regenerate the molecular sieve, and a part of the exhaust gas enters the pre-cooling system to provide cooling capacity.

The process of almost every air separation equipment is different. The process is designed by the air separation manufacturer according to the product gas-liquid state, equipment scale, oxygen-nitrogen ratio, investment scale, energy consumption requirements and many other factors. There is no uniform norm. The general principle is that the pre-cooling system pre-cools the compressed hot air, and then the purification system removes harmful impurities before entering the cold box. Inside the cold box, the air is cooled by an expander, and various gases exchange heat through a heat exchanger to reach the temperature required by the process, and the air is separated by a splitter tower and a main cooler.

The input above is purely manual. If you have any questions, please feel free to ask.