The modular nitrogen generator is composed of a plurality of high-strength aluminum alloy cavities. Each chamber is divided into two chambers, each filled with an adsorbent to separate nitrogen and oxygen from the compressed air.
When one chamber is working (adsorption), the opposite side of it is regenerated by pressure swing adsorption. When working, the compressed air is evenly diffused from the bottom of the adsorption chamber to the top, and the oxygen in the air is adsorbed by the adsorbent to achieve the separation of nitrogen and oxygen to obtain nitrogen. During regeneration, a part of high-purity nitrogen expands from the working pressure to the atmospheric pressure, passes through the oxygen-saturated adsorbent, takes away the oxygen adsorbed by it, and the adsorbent is regenerated.