1、 Membrane separation nitrogen generator (commonly used)

1. The core components arehollow fiber membraneThe membrane wall has countless tiny pores (with pore sizes of only a few nanometers).
2. When working, the compressor pressurizes the air and sends it into the membrane module. Small molecules such as oxygen, carbon dioxide, and water vapor in the air can be quickly discharged through the membrane pores, while nitrogen molecules have a slightly larger volume and slower permeation rate, and will accumulate on the other side of the membrane.
3. The final collected gas is high-purity nitrogen gas (usually 99.9% -99.995% purity), which is directly supplied to liquid as drying gas and atomizing gas.

2、 Pressure Swing Adsorption (PSA) Nitrogen Generator (High Purity Requirement)

1. The core isadsorption towerEquipped with specialized adsorbents (such as carbon molecular sieve CMS), the adsorption capacity of the adsorbents for oxygen and nitrogen varies greatly.
2. The work is divided into two steps in a cycle:
   • Pressure adsorption: Compressed air enters the adsorption tower, and the adsorbent preferentially and strongly adsorbs impurities such as oxygen, carbon dioxide, and moisture. Nitrogen is not adsorbed and is discharged as product gas;
   • Decompression desorption: When the adsorbent is saturated with adsorbed impurities, the adsorption tower is depressurized, and the adsorbed impurities are desorbed and discharged. The adsorbent is regenerated, and then switched to another adsorption tower to continue working (alternating between the two towers to achieve continuous nitrogen output).
3. It can obtain higher purity nitrogen gas (up to 99.999% or more), suitable for high-sensitivity liquid chromatography and high-end mass spectrometry.