| 摘要 |
<p>[Problem] To provide a method for controlling a system for absorbing CO2, wherein a CO2 absorber can be recycled and heat can be effectively used during the operation of a CO2 absorption equipment. [Solution] A system comprises: a CO2 absorption equipment in which exhaust gas is brought into contact with absorber to absorb CO2 in the exhaust gas in an absorption tower (20), then the CO2 is desorbed in a regeneration tower (40), the absorber after the CO2 desorption is heated, then the absorber that circulates in the regeneration tower (40) and is extracted from the regeneration tower (40) is heat exchanged with the absorber that is supplied to the regeneration tower, and then the absorber circulates in the absorption tower (20); and an absorber recycling apparatus (94) in which the absorber is extracted from the regeneration tower (40), thermally-stable salts that are accumulated in an amine absorber are removed by a distillation method, and then the generated vapor of the absorber is supplied to the regeneration tower. The vapor generated from the absorber recycling apparatus is controlled to have similar temperature and pressure to those of heating steam of a reboiler using the absorber in the system for chemically absorbing carbon dioxide as a refrigerant source before being supplied to the regeneration tower (40).</p> |
