Pressure swing adsorption (PSA) oxygen generation has become an alternative to cryogenic oxygen generation.

Classification: Company news

Release time: 2023-09-15

Summary:

  Industrial oxygen production utilizes the fact that liquid nitrogen has a lower boiling point than liquid oxygen. This method is physical; it first uses low-temperature pressurization to liquefy air. Then, by adjusting the temperature and utilizing the lower boiling point of liquid nitrogen, the liquid nitrogen is evaporated, leaving behind primarily liquid oxygen.
 
　　With the increasing scale and reliability of pressure swing adsorption (PSA) oxygen production, and the decreasing energy consumption, coupled with its advantages of flexible operation, simple load adjustment, low energy consumption, short equipment construction cycle, and high safety, PSA is undoubtedly a viable alternative to cryogenic oxygen production for industries requiring flexible oxygen use. Its application range is also expanding year by year. In recent years, PSA oxygen production technology has been widely used in the steel, non-ferrous metallurgy, chemical, kiln, and environmental protection industries.
 
　　The PSA oxygen production process is simple, mainly consisting of a power system, an adsorption system, and a valve switching system. It requires fewer equipment, saving on initial investment costs; it has a small footprint, reducing civil engineering and land costs; and it has a shorter equipment manufacturing cycle (typically no more than 4 months for major equipment, with oxygen production achievable within 6 months under normal circumstances). This significantly reduces construction time compared to cryogenic oxygen production, which takes nearly a year.
 
　　Pressure swing adsorption (PSA) emerged in the late 1950s. It uses zeolite molecular sieves as adsorbents, utilizing the principle of pressure adsorption and depressurization desorption to adsorb and release nitrogen from the air, thereby separating oxygen. This technology, after decades of development, is now quite mature and has the following characteristics:
 
　　1. Oxygen can be separated from air at room temperature.
 
　　2. The cost of gas separation is low, mainly electricity consumption, and the electricity consumption per unit of oxygen produced is relatively low.
 
　　3. Molecular sieves are reusable, with a typical lifespan of 8-10 years.
 
　　4. The raw material comes from air, making it environmentally friendly and efficient. Raw materials are readily available.
 
　　5. Very high purity oxygen can be produced to meet various oxygen demands.
 
　　6. Oxygen is produced on demand; equipment can be easily started and stopped, and gas production is fast.
 
　　7. The equipment is simple, easy to operate, highly automated, and can be operated unmanned.
 
　　8. The equipment system construction cost is relatively low, and the maintenance cost is low.

Key words: Pressure swing adsorption (PSA) oxygen generation has become an alternative to cryogenic oxygen generation.

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