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CO2 recovery system and CO2 recovery method

  • US 9,623,366 B2
  • Filed: 03/04/2013
  • Issued: 04/18/2017
  • Est. Priority Date: 03/04/2013
  • Status: Active Grant
First Claim
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1. A CO2 recovery system comprising:

  • a pre-treatment apparatus that cools an exhaust gas;

    an absorption apparatus that brings a CO2 absorption liquid into contact with the exhaust gas treated by the pre-treatment apparatus so that CO2 in the exhaust gas is absorbed into the CO2 absorption liquid;

    a regeneration apparatus that receives the CO2 absorption liquid having absorbed CO2 from the absorption apparatus and heats the CO2 absorption liquid to separate CO2 from the CO2 absorption liquid;

    an absorption liquid circulation path that circulates the CO2 absorption liquid between the absorption apparatus and the regeneration apparatus; and

    an impurity removal unit, provided in the absorption liquid circulation path, that removes impurities dissolved in the CO2 absorption liquid and having a high concentration in the absorption liquid circulation path from the exhaust gas, the impurity removal unit including;

    a reclaimer that draws and heats the CO2 absorption liquid of the absorption liquid circulation path, heats and concentrates impurities in the CO2 absorption liquid, and returns condensate water to the regeneration apparatus; and

    an ion-exchange apparatus that brings the CO2 absorption liquid of an absorption liquid drawing path that supplies the CO2 absorption liquid from the absorption liquid circulation path to the reclaimer into contact with an ion-exchange resin to remove the impurities.

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