| 摘要 |
<p>In order to provide a configuration in which when combustible gas is enriched, starting material loss can be reduced to a minimum and the combustible gas can be efficiently enriched to a high concentration, an adsorption tower (2) which is filled with an adsorbent (21) is provided, a supply/release means (31) which supplies source gas (G) containing combustible gas and air is provided, a collection means (51) which desorbs and collects the combustible gas adsorbed by the adsorbent (21) is provided, a control means (6) which sequentially executes a combustible gas adsorption step and a combustible gas desorption step is provided, a detection means (33) which detects the combustible gas concentration in the source gas is provided, and the control means (6) is provided with an operation condition setting unit (63) which changes the adsorption completion time point at which the adsorption step is completed on the basis of the combustible gas concentration detected by the detection means (33).</p> |
