System for capturing and recycling carbon dioxide in exhaust gas
The present invention provides a system for capturing and recycling carbon dioxide in an exhaust gas, which includes a CO 2 capture unit into which an exhaust gas containing CO 2 is input, and which captures the CO 2 as a high concentration enriched gas and separates a first treatment gas; a mineralization process unit which mineralizes the CO 2 after receiving the high concentration enriched gas captured in the CO 2 capture unit and discharges a second treatment gas; a mixing tank which receives the first treatment gas and the second treatment gas and mixes them so that the contained CO 2 has a predetermined concentration; a photo-culture process unit which receives the resulting third treatment gas from the mixing tank to perform a photo-culture process using microalgae; and a control unit which controls the flow rates and the CO 2 contents of the gases supplied and discharged to/from the CO 2 capture unit, the mineralization process unit, the mixing tank and the photo-culture process unit.
1. A system for capturing and recycling carbon dioxide in an exhaust gas, comprising:
an exhaust gas inlet into which an exhaust gas is input and which distributes the gas;
a photo-culture process unit which receives the exhaust gas from the exhaust gas inlet to perform a photo-culture process using microalgae and discharge a first treatment gas;
a mixing tank which mixes the exhaust gas from the exhaust gas inlet and the first treatment gas from the photo-culture process unit and discharges a second treatment gas;
a CO 2 capture unit which receives the second treatment gas from the mixing tank and captures CO 2 contained in the second treatment gas at a high concentration as an enriched gas;
a mineralization process unit which receives the enriched gas captured in the CO 2 capture unit to mineralize the CO 2 , and discharges a third treatment gas; and
a control unit which controls the flow rates and the CO 2 contents of the gases supplied and discharged to/from the exhaust gas inlet, the photo-culture process unit, the mixing tank, the CO 2 capture unit and the mineralization process unit,
wherein the third treatment gas is input into the mixing tank.
2. The system of claim 1 , wherein the control unit controls an amount of the exhaust gas supplied to the photo-culture process unit through the exhaust gas inlet by considering a CO 2 treatment efficiency of the photo-culture process unit.
3. The system of claim 1 , wherein the control unit controls the CO 2 concentration in the mixing tank to 8 to 10%.
4. The system of claim 1 , wherein the enriched gas is supplied in a liquefied state.