The single pressure stripper in monoethanolamine(MEA) based CO2 capture system was replaced by bi-pressure stripper

and optimized parameters were adopted to improve the CO2 compression process.Taking a supercritical 600 MW unit as the object

the economic indices of CO2 capture compression process were simulated

under different unit loads

extraction parameters

flue gas flows and CO2 capture rates conditions.The results showed that

after the improvement

the energy consumption of this CO2 capture and compress system can be reduced by 6.9% at most

and the unit power can be increased by 2.4%.According to the calculation

under condition with load of 602.5 MW

flue gas treated rate of 60% and CO2 capture rate of 90%

the optimized CO2 capture and compress system can reduce electricity of 2.86×107 kW·h and save CO2 removal cost of 7.15×106 yuan

compared with the conventional processes.