| 摘要 |
<p>PURPOSE:To enhance product yield by setting a time zone requiring no regenerated gas using adsorbing equipment wherein the regenerating process time of an adsorbing device is shorter than the adsorbing process change-over time thereof and performing the regenerating process of the adsorbing device only at the stop time of a cryogen supply apparatus. CONSTITUTION:A liquefying and rectifying apparatus 3 is continuously operated all day without being stopped and the operation of a cryogen supply apparatus 5 is set so as to be stopped during the daytime expensive in the power rate but operated during the night inexpensive in the power rate. The change-over of the adsorbing processes of both adsorbing devices A, B of adsorbing equipment 2 is performed in the intermediate part between a night operation time zone and a daytime operation time zone. One adsorbing device A is subjected to an adsorbing process over the time zone from nighttime to daytime and the other adsorbing device B is subjected to the adsorbing process over the time zone from daytime to nighttime and the parts coming to the daytime operation time zones among the time zones not performing the respective adsorbing processes of both adsorbing devices A, B are set to regenerating process times and the parts coming to the night operation time zones are set to standby process times.</p> |
