| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a maintenance method of a column body capable of certainly avoiding a phenomenon that the large pressure caused by the head of a liquid is transmitted to an outlet valve, a circulating line, an inlet valve and the column body as an impact when the liquid remaining in the circulating pump positioned above the outlet valve is returned to the column body, and to provide a device therefor. <P>SOLUTION: At the time of stop of the circulating pump 5, the inlet valve 8 and outlet valve 9 of the circulating pump are once closed and a bypass line 17 for gently returning the absorbing liquid 1 remaining in the circulating line 4 to the liquid storage part 1a provided to the lower part of an absorbing tower 3 when the inlet valve 8 is opened is arranged so as to allow the outlet side and inlet side of the outlet valve 9 to communicate with each other. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
