CO2 RECOVERY METHOD FROM MIXED GAS BY AMINE SOLUTION

摘要

A method for recovering carbon dioxide in a mixed gas using amine is provided to secure profitability by reducing supply quantity of an absorption liquid through side stream to about 20~30% and not lowering absorption efficiency of carbon dioxide. A method for recovering carbon dioxide in a mixed gas using amine comprises steps of: supplying the mixed gas at a lowest bottom of an absorptive tower and an absorption liquid at an upper bottom of an absorptive tower; re-supplying the absorption liquid not reacted with the carbon dioxide of the mixing gas in the provided absorption liquid by revolving the absorption liquid to a top portion of the absorptive tower; reducing the absorption liquid supplied to the top of the absorptive tower as an amount side-streamed; and discharging a carbon dioxide absorption liquid(16) reacted inside the absorptive tower and discharging clean gas(18) in which the carbon dioxide is removed to an upper end of the absorptive tower.