| 摘要 |
PROBLEM TO BE SOLVED: To provide a COrecovering device capable of keeping constant the concentration of a COabsorbing solution even for a long period of time, as well as a COrecovering method.SOLUTION: This COrecovering device includes a COabsorption column 16 for removing COof an exhaust gas 12 by bringing the exhaust gas 12 containing COinto contact with the COabsorbing solution 15 and a regeneration column 18 for regenerating the COabsorbing solution 15 by removing COof a rich solution 17 which has absorbed CO. That is, the COrecovering device operates to reuse the COabsorbing solution 15 at the COabsorption column 16 as a lean solution with no COleft by removal using the regeneration column 18. In addition, the COrecovering device has a control means which detects the temperature difference in the gas temperature (T) of an inlet exhaust gas 12 to be introduced into the inlet of the COabsorption column 16 and the gas temperature (T) of the outlet exhaust gas 21 at the COabsorption column 16 as well as the absorbent concentration (X (Vol%)) of the COabsorbing solution 15. Further, the control means makes an adjustment of the moisture content of the gas in accordance with the gas temperature difference in the inlet exhaust gas 12 and the outlet exhaust gas 21 at the COabsorption column 16, and then, performs a control process to maintain the absorbent concentration of the COabsorbing solution 15 within a preset range (e.g. X±relative ratio 10%). |
