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The working principle of nitrogen making machine

The working principle of nitrogen making machine

The working principle of nitrogen making machine

Sep 08,2021

The working principle of nitrogen generator

The nitrogen generator uses the principle of pressure swing adsorption (PSA) at room temperature to separate air to produce high-purity nitrogen. Usually two adsorption towers are used in parallel, and the imported PLC controls the imported pneumatic valve to automatically operate, alternately carry out pressurized adsorption and decompression regeneration, complete the nitrogen and oxygen separation, and obtain the required high-purity nitrogen.
Molecular sieve can adsorb oxygen and nitrogen in the air at the same time, and its adsorption capacity also increases with the increase of pressure, and there is no obvious difference in the equilibrium adsorption capacity of oxygen and nitrogen under the same pressure.
Therefore, it is difficult to effectively separate oxygen and nitrogen based on changes in pressure alone. If the adsorption rate is further considered, the adsorption characteristics of oxygen and nitrogen can be effectively distinguished. The diameter of oxygen molecules is smaller than that of nitrogen molecules, so the diffusion speed is hundreds of times faster than that of nitrogen. Therefore, carbon molecular sieves can adsorb oxygen very quickly, and the adsorption can reach more than 90% in about 1 minute; at this time, the adsorption amount of nitrogen is only 5% About, so the adsorbed at this time is mostly oxygen, and the rest is mostly nitrogen.

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