CARBON DIOXIDE RECOVERY SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a carbon dioxide (CO2) recovery system capable of sufficiently reducing the oxygen concentration in a recovered CO2gas while maintaining the high recovery rate of carbon dioxide from a CO2-absorbed liquid.

SOLUTION: The CO2recovery system includes: a CO2absorption tower 20 for absorbing and removing CO2in a combustion exhaust gas into a CO2-absorbing liquid by bringing the combustion exhaust gas into contact with the absorbing liquid; a dissolved oxygen-removing unit which uses at least one of units for blowing a bubbling gas into the CO2-rich absorbing liquid, applying ultrasonic vibration, and heating the CO2-rich liquid; a bubble-removing unit 30 for making the CO2-rich liquid which absorbs CO2at the tower 20 to spirally flow or agitating; and a regeneration tower 40 which regenerates the absorbing liquid by releasing CO2from the absorbing liquid from which oxygen is removed by the dissolved oxygen removing unit and the bubble removing unit, and obtains the CO2gas.

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