Apparatus for producing oxygen-enriched air using a pressure swing adsorption gas separation apparatus

摘要

PROBLEM TO BE SOLVED: To continuously supply oxygen-enriched air to users by supplying only residual oxygen-enriched air in a gas storage vessel in the case of making the inside of an adsorption column have atmospheric pressure at the time of supplying the oxygen-enriched air from the adsorption column of a PSA type gaseous nitrogen separation device through the gas storage vessel. ;SOLUTION: In the adsorption mode, oxygen in air is adsorbed by an adsorbent by introducing compressed air from an air compressor 3 to one of the adsorption columns 10, 20, for example the adsorption column 10. On the other hand, in the generation mode, a storage vessel inlet valve 8 is opened and another adsorption column 20 is connected to the storage vessel 9. As a result, a part of oxygen adsorbed in the adsorbent is dasorbed and the oxygen-enriched air is generated in the adsorption column 20 and the storage vessel 9 by letting the compressed air in the adsorption column 20 flow to the storage vessel 9 to expand to lower the pressure in the adsorption column 20. And in the regeneration mode, the adsorbent in the adsorption column is regenerated with the inlet valve 8 closed and an air releasing valve 4 opened and in the meantime, the residual oxygen enriched air in the storage vessel 9 is sent to the users.;COPYRIGHT: (C)2000,JPO