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PSA pressure swing adsorption industrial oxygen generator is based on the principle of pressure swing adsorption, zeolite molecular sieve with high quality as adsorbent, under pressure, oxygen from air. Purified dry compressed air, pressure adsorption, vacuum desorption in the adsorber. Due to the aerodynamic effect, nitrogen in the zeolite molecular sieve is far greater than the rate of oxygen diffusion in micropores, nitrogen is preferentially adsorbed zeolite molecular sieve, oxygen in the gas phase is enriched, the formation of product oxygen. After decompression to atmospheric pressure, nitrogen and other impurities adsorbent by adsorption desorption of, realize regeneration. General settings in the system of two adsorption towers, one tower adsorption oxygen production, the other tower of regeneration, through the PLC program controller to control the opening and closing valve of the gas, so that the two towers cycle, in order to achieve the purpose of continuous production of high quality oxygen. The whole system is composed of the following parts: compressed air purification components, air storage tank, oxygen nitrogen separation device, an oxygen buffer tank.