PSA (Pressure Swing Adsorption) nitrogen generator is a device that uses the adsorption properties of carbon molecular sieves to separate air components. It achieves nitrogen and oxygen separation through pressure changes and is widely used in industrial fields.

Working principle

The PSA nitrogen generator uses air as feedstock and carbon molecular sieves as adsorbent. Carbon molecular sieves have pore sizes of 0.3-1 nanometers, allowing only oxygen molecules (0.346 nanometers in diameter) to enter and be adsorbed, while nitrogen molecules (0.364 nanometers in diameter) cannot enter, thus separating the gases. Continuous gas supply is achieved through alternating pressure adsorption and depressurization regeneration cycles in a dual-tower system.

Technical features

Rapid gas production: Qualified nitrogen gas can usually be produced in 15-30 minutes.

Low energy consumption: Energy consumption is only 20%-30% of that of cryogenic methods.

Controllable purity: The purity of the nitrogen in the product can be adjusted within a wide range (e.g., 99.9%-99.999%).

Modular design: Supports parallel multi-tower operation to adapt to different scale requirements.

Application scenarios

It is mainly used in petrochemical oxidation protection, electronic welding, food preservation, and metal heat treatment, and plays a dominant role, especially in equipment with a capacity of less than 1000 Nm³/h.