| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a purification apparatus for generating argon-free high concentration oxygen, which can generate high concentration oxygen having concentration higher than that of oxygen obtained by a conventional apparatus. <P>SOLUTION: In the apparatus, in which concentrated oxygen, generated from a PSA oxygen generator for separating and concentrating oxygen from air by pressure swing adsorption, is used as a raw material gas 10, and then only oxygen contained in the raw material gas 10 is adsorbed at ordinary temperature under a pressure not lower than the atmospheric pressure, and oxygen not containing argon gas is taken out by using a vacuum pump 15, two adsorption towers 11, 11', in each of which an adsorbent having pores each having a diameter not larger than that of argon molecule is filled, are parallelly arranged, and following operations comprising: taking oxygen out of the adsorption tower 11 by reducing the pressure inside the adsorption tower 11 when oxygen adsorption is finished; then adding oxygen taken out immediately after the pressure is reduced to the raw material gas 10 to use it for raising the pressure of the other adsorption tower 11' immediately after oxygen is desorbed; and at the same time, taking out oxygen remaining in the adsorption tower 11 as an oxygen product are alternately and repeatedly carried out for both adsorption towers 11,11' to obtain high concentration oxygen having a concentration of≥99.6%. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
