| 摘要 |
<p>PURPOSE:To produce a useful mixed gas contg. concd. hydrogen at low cost by using plural adsorption beds wherein the pressure adsorption and desorption of waste gas are alternately carried out, and adsorbing the easily adsorbable components in the mixed gas to take out useful gases such as H2 and N2. CONSTITUTION:A compressed mixed gas contg. H2, N2, etc. is introduced into adsorption beds of >=4, A, B, C, D, etc. wherein an adsorbent such as activated alumina is packed, and the esaily adsorbable components are adsorbed under pressure and removed. The first and the second hardly adsorbable components, H2 and N2, are concentrated and taken out. Each stage such as pressure equalization, desorption of waste gas under reduced pressure, etc. other than said adsorption stage is successively changed over and carried out in said each adsorption bed A, B, C, and D by using a pressure-reducing and air-discharging means 16, etc. consisting of pipings and valves connected to each adsorption bed, a vacuum pump, etc. By said operation, the useful mixed gas contg. H2 and N2 which can be reutilized is concentrated, refined, and recovered at low cost with the convenient device from the raw mixed gas.</p> |
