PSA nitrogen generator for industrial use

SHANLI carbon Molecular Sieves (CMS) separate gases by exploiting the difference in diffusion rates of oxygen (O₂) and nitrogen (N₂) within micropores. The kinetic diameter of oxygen molecules (0.346 nm) is slightly smaller than that of nitrogen molecules (0.364 nm), allowing oxygen to be adsorbed more rapidly under pressure while nitrogen is enriched and discharged as the product gas.

Industrial nitrogen production typically employs Pressure Swing Adsorption (PSA) technology, which cyclically performs adsorption (pressurized oxygen adsorption) and desorption (depressurized oxygen release) to achieve continuous nitrogen generation.

Compressed Air:

Air is pressurized to 4–8 bar by a compressor, with moisture and oil removed.

Adsorption Tower:

The compressed air enters a tower filled with CMS, where oxygen, water vapor, and CO₂ are adsorbed, while nitrogen passes through.

Switch Regeneration:

A dual-tower design ensures continuity: while one tower adsorbs, the other depressurizes to desorb oxygen and undergoes purging for regeneration.

Nitrogen Purification:

The product nitrogen can achieve a purity of 95%–99.999% (adjustable based on process requirements).