| 摘要 |
<p>PURPOSE:To obtain gaseous hydrogen, which is a product, with high purity and a good recovery rate by recycling a part of waste gas into raw material gas in an adsorption type gaseous hydrogen system. CONSTITUTION:Raw material gas to be used contains 100Nm<3>/h gaseous hydrogen and 5Nm<3>/h impurities similarly to the prior art, and the recovery rate in the section of an adsorption tower is made similarly 60%. The same raw material, the same adsorbent and the similar operating pressure are used. The flow of recycling gas is adjusted to 5:1 ratio to waste gas by a recycling gas valve 12, and is incorporated into the raw material gas. The total recovery rate in this case is 90%, which is 30% higher than that in the prior art, thus indicating that the much larger amt. of the refined gaseous hydrogen is separated from the waste gas usable heretofor only for the fuel purpose alone.</p> |
