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PSA means Pressure Swing Adsorption. This On Site PSA oxygen gas generator is based on following working principle. Compressed air through filtration and purification to remove remnant water, oil, dust, and then enters adsorption vessel filled with molecular Sieve. Nitrogen is absorbed by sieve and desired oxygen passes to output as product gas at purity 93+/-3% (90%-96%), specially 99.5% purity oxygen is available with a purifier.
VPSA means Vacuum Pressure Swing Adsorption. Feed air is sucked filters for removal of dust before boosted to 0.3~0.5barg by roots blower. It then goes into an absorber full of absorbent activated aluminum to eliminate water, CO2 and other gases at the bottom, above which N2 absorbed by absorbent zeolite molecular sieve. O2 with argon is output on the top as product gas into oxygen buffer tank and then boosted to higher pressure by oxygen compressor to consumption point.
Cryogenic oxygen plant ASU can generate only oxygen, or generate both oxygen and nitrogen in gas or liquid form. The working principle of it is that dry saturated air with purifications to remove moisture, impurities entering the lower tower becomes liquid air as it continues to be cryogenic. Physically air is separated, and high purities oxygen and nitrogen are obtained by rectifying in fractionating column according to different boiling points of them. Rectifying is the process of multiple partial evaporation and multiple partial condensation.
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SHANDONG YOUCHI GAS IMPORT AND EXPORT CO., LTD
ADD:Room 1324, Xinxing International Building, No. 1288 Sanba Road, ETDZ of Dezhou City, Shandong Province China
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