| 摘要 |
PROBLEM TO BE SOLVED: To solve such a problem that COremoval methods and devices using the conventional art are useful on the issue of suppressing scattering of amines, however, compounds emitted together with exhaust gas include not only base amines of an absorbing solution but also degradation products generated by oxidation degradation or thermal degradation, and therefore, regarding toxic refractory organic substances in the compounds, there is a need for a method for surely preventing emission of toxic refractory organic substances in the atmosphere from the viewpoint of the impact on the ecosystem.SOLUTION: A COabsorption device includes: a COabsorption tower 1 that brings combustion exhaust gas into contact with a carbon-dioxide absorbing solution and removes COin the gas; a regeneration tower 13 that heats the absorbing solution into which the COis absorbed and recovers the CO; absorbing-solution circulation lines 5, 10 that connect the absorption tower and the regeneration tower; and a heat exchanger 22 that is provided in the circulation lines and simultaneously executes cooling of the absorbing solution, from which the COis removed in the regeneration tower, and heating of a rich absorbing solution. The COrecovery device is configured to provide an ultraviolet-ray irradiation device 26 in the circulation line 5 of the absorbing solution returning from the regeneration tower 13 to the absorption tower 1. |
