CCS can effectively solve the problem of large-scale carbon emissions from coal-fired units, but at a considerable expense in terms of high energy and water consumption. In this paper, the conventional MEA-based CO₂ capture system process is improved and integrated optimization with coal-fired power plant. An MEA-based CO₂ capture system coupled with membrane condenser and an improved integrated decarbonization system are proposed based on the recovery potential of waste heat from flue gas and CO₂ capture system. Besides, an MEA-based CO₂ capture system coupled with membrane condenser is proposed. The membrane condenser is added to exchange heat with the rich solvent flowing from the bottom of the absorber before the flue gas into the absorber for recovering the flue gas hydrothermal energy. The regeneration duty of the CO₂ capture system is reduced from 4.341 MJ/kg CO₂ to 4.275 MJ/kg CO₂. The extraction steam is further utilized by a small steam turbine before being sent to the reboiler. And the heat released by CO₂ condensation at the top of stripper and CO₂ cooling in the middle of multi-stage compression is used to heat the condensate of coal-fired system. Compared with the simple integration scheme which adopts the same CO₂ capture system, the output power of the integrated decarbonization system increases from 510.719 MW to 593.850 MW. Correspondingly, the thermal efficiency increases by 6 %, the exergy efficiency increases by 5.86 % and the cooling water saves 1497.12 kg/s. Moreover, the variation of output power and saving cooling water with the membrane condenser parameters of the improved integrated system is analyzed.

CCS可有效解决燃煤机组大规模碳排放问题，但在高能耗和水耗方面付出了不小的代价。本文对传统的基于MEA的CO ₂捕集系统工艺进行了改进，并与燃煤电厂进行了集成优化。基于烟气和CO ₂捕集系统余热的回收潜力，提出了一种基于MEA的CO ₂捕集系统与膜冷凝器和改进的集成脱碳系统相结合。此外，基于 MEA 的 CO ₂提出了与膜冷凝器耦合的捕集系统。在烟气进入吸收塔前，增设膜冷凝器与从吸收塔底部流出的富溶剂进行换热，回收烟气水热能。_{CO 2}捕集系统的再生负荷从4.341 MJ/kg CO ₂减少到4.275 MJ/kg CO ₂。抽汽在被送到再沸器之前由小型汽轮机进一步利用。汽提塔顶部CO ₂冷凝放出的热量和多级压缩中间CO ₂冷却放出的热量用于加热燃煤系统的凝结水。与采用相同CO _{2的简单集成方案相比}捕获系统，综合脱碳系统的输出功率从510.719 MW增加到593.850 MW。相应地，热效率提高了6%，火用效率提高了5.86%，节约冷却水1497.12 kg/s。此外，分析了改进后的集成系统的输出功率和节水量随膜冷凝器参数的变化。