What is small air separation unit?
A small air separation unit is an industrial equipment used to separate the various components of gas in the air. It mainly converts air into liquid through compression cycle and deep freezing, and then gradually separates inert gases such as oxygen, nitrogen, and argon from the liquid air through the distillation process. This equipment is widely used in traditional metallurgy, new coal chemical industry, large-scale nitrogen fertilizer, professional gas supply and other fields.
The working principle of a small air separation unit includes the following steps
- Compression system: compress and filter the air.
- Precooling system: precool the compressed air.
- Purification system: further purify the air.
- Heat exchange system: heat exchange through a heat exchanger.
- Product delivery system: deliver the separated gas.
- Expansion refrigeration system: use an expansion mechanism for refrigeration.
- Distillation tower system: distill and separate air components.
- Liquid pump system: handle liquid gas.
- Product compression system: compress the final product.
Small air separation units require special attention in design and operation, such as ensuring the complete connection of the cooling water circulation, avoiding damage to the equipment during welding in the cold box, and ensuring the internal cleanliness of the equipment to avoid grease contamination.
Application of Air Separation Unit (ASU)
- Chemical Industry: ASU is used in the chemical industry to provide oxygen and nitrogen, which play an important role in the production process of chemical products. Since ASU is usually located far away from the point of use, its products are supplied to chemical companies through pipelines.
- Petroleum Industry: In the petroleum industry, the oxygen and nitrogen provided by ASU are used in various processes, such as improving refining efficiency and optimizing production processes.
- Manufacturing: Various manufacturing processes provide the required oxygen and nitrogen, which are essential in metal processing, electronic product manufacturing and other links.
- Petrochemical Industry: Producing various chemicals and plastics, these industries require a large amount of nitrogen and oxygen as production raw materials or process gases.
- Metallurgical Industry: In the metallurgical industry, the gases provided by ASU are used in the manufacturing process of steel and other metals, such as for iron and steelmaking.
- Industrial Utility Construction: In Industrial Utility Construction=Provide the required gases in power plants and wastewater treatment facilities.
- Sustainable Development Field: With the emphasis on low carbon and sustainable development, ASU plays an important role in helping the industrial sector reduce carbon emissions and improve energy efficiency.
- Large Air Separation Units: For customers who require large quantities of gas, such as the gasification industry, we provide large cryogenic oxygen units that use the latest technology to safely and reliably supply gas for a variety of industrial processes.
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