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1.The filtered air is blow into the adsorber A/B with molecular sieve and active Alumine by blower. While the air passes through the adsorption bed, the nitrogen molecule therein is adsorbed by molecular sieve and the oxygen and argon leave the bed for buffer tank. Then the oxygen is compressed to the pressure specified by user and sent to the storage tank by oxygen compressor.
2.After adsorption for a while, the molecular sieve is full of nitrogen, reaching the stage of saturation. Then close the air inlet valve (A1/B1) and wash the vacuumed vessel with oxygen enrichment gas. When the pressure is decreased to a certain value, close the pressure equalizing valve (A2/B2)and open the inlet valve (A3/B3)of vacuum pump, vacuuming the vessel and exhausting the nitrogen.
3.After vacuuming to a certain degree, wash the molecular sieve with oxygen enrichment gas of the other vessels and product gas of buffer tank and desorb the adsorbent completely. After desorption, pressurize the vessel with product gas to a certain vacuum degree and close the buffer valve (Abr), open the outlet valve (A1/B1) of blower, pressurizing the vessel and preparing for the next adsorption.
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