Patent ID: 9675926
Date: 2017-06-13
CPC Classifications: B01D,C01B

Claim:
1. An oxygen concentrating method using an oxygen concentrating apparatus comprising a first adsorption bed and a second adsorption bed which are respectively formed to allow air supplied at lower portions thereof move upwardly and are respectively filled with absorbent capable of selectively adsorbing nitrogen relative to oxygen and performing oxygen centration by alternatively performing a pressurization process and a depressurization process of the first adsorption bed and the second adsorption bed, comprising: performing a nitrogen adsorption in the first adsorption bed by supplying pressurized air to the first adsorption bed so as to increase pressure of the first adsorption bed and at the same time removing nitrogen from the second adsorption bed; equalizing pressures of upper portions of the first adsorption bed and the second adsorption bed by moving air of the upper portion of the first adsorption bed to the upper portion of the second adsorption bed when pressure of the first adsorption bed becomes a predetermined pressure; equalizing pressures of upper and lower portions of the first adsorption bed and the second adsorption bed by moving air of the upper portion of the first adsorption bed to the upper portion of the second adsorption bed and by moving air of the lower portion of the first adsorption bed to the lower portion of the second adsorption bed; performing a nitrogen adsorption in the second adsorption bed by supplying pressurized air to the second adsorption bed so as to increase pressure of the second adsorption bed and at the same time removing nitrogen from the first adsorption bed; equalizing pressures of upper portions of the first adsorption bed and the second adsorption bed by moving air of the upper portion of the second adsorption bed to the upper portion of the first adsorption bed when pressure of the second adsorption bed becomes a predetermined pressure; equalizing pressures of upper and lower portions of the first adsorption bed and the second adsorption bed by moving air of the upper portion of the second adsorption bed to the upper portion of the first adsorption bed and by moving air of the lower portion of the second adsorption bed to the lower portion of the first adsorption bed; and removing water separated from the pressurized air which will be supplied to the first adsorption bed and the second adsorption bed for a predetermined time.