Air Seperation Unit(ASU)
Air separation unit is a kind of equipment that takes air as a raw material, turns it into a liquid state by compressing and cooling it to cryogenic temperatures, and then gradually separates oxygen, nitrogen, argon or other liquid products from the liquid air by rectification. According to users’ needs, the products of air separation units can be single or multiple products at the same time, which can be gas or liquid.
The specific process (external compression) is: the compressed air from the air compressor, after removing impurities such as moisture, carbon dioxide, drocarbons and other impurities through the molecular sieve, is directly sent to the upper distillation column, and the other part enters the expander. After expansion, the cryogenic air is sent to the lower column. By rectification, nitrogen can be obtained at the top of the upper column and oxygen at the bottom of the upper column. The separated oxygen, nitrogen and exhaust gases are reheated by the main heat exchanger and then discharged from the cold box. The oxygen or nitrogen products coming out of the cold box are compressed by the compressors to the specified pressure and sent to the user.
1. The advanced performance calculation software imported from abroad is used to optimize and analyze the process of this equipment to ensure that it has the best technical and economic indicators and an excellent performance-price ratio.
2.The air separation unit (main product O2) adopts a high efficiency condensation evaporator with a forced flow of liquid inlet in the lower part of the air liquid, allowing the oxygen-enriched air to be forced evaporation and flow from bottom to top in the condensation evaporator, avoiding drocarbon accumulation.
3. To ensure the safety and reliability of the equipment, all pressure vessels, pressure piping and pressure components in the ASU are strictly designed, manufactured and inspected in accordance with relevant national regulations. The ASU cold box and the piping in the cold box have passed the strength calculation.
Most of the engineers on the company’s technical team have done a large number of cryogenic ASU designs for international gas companies and domestic gas companies.
With extensive experience in ASU design and project execution, we can offer nitrogen generators (300 Nm3/h–60,000 Nm3/h), small ASUs (1000 Nm3/h–10,000 Nm3/h), and large ASUs (20,000 Nm3/h–60,000 Nm3/h).
