为了减小化学吸收法烟气CO₂捕集系统的能耗,分析了影响CO₂捕集过程的关键因素,获得了吸收塔内温度和CO₂分布特征、CO₂捕集过程的能耗重点单位。然后对吸收塔中间冷却、半贫液分流、热泵等节能技术进行了研究和对比,其中半贫液分流和热泵节能技术的节能效果较显著。在此基础,探索了不同节能技术的集成与耦合,与典型化学吸收法CO₂捕集工艺相比,半贫液分流与直接热泵技术、间接热泵技术集成后碳捕集工艺的单位能耗分别下降了23.94%和41.79%。半贫液分流与间接热泵技术集成后CO₂捕集工艺的节能效果最好。

In order to reduce the energy consumption of the flue gas CO₂ capture system using chemical absorption method,the key factors affecting the CO₂ capture process are analyzed.The characteristics of temperature and CO₂ distribution in the absorption tower,and the key energy consumption units in the CO₂ capture process are obtained.Then energy-saving technologies such as absorption tower intermediate cooling,semi-poor liquid diversion and heat pump are studied and compared,among which semi-poor liquid diversion and heat pump energy-saving technologies present more significant energy-saving effects.On this basis,the integration and coupling between different energy-saving technologies are explored.Compared with the typical chemical absorption CO₂ capture process,the carbon capture process integrated with semi-poor liquid diversion and direct heat pump technologies reduces the energy consumption by 23.94%,and the carbon capture process integrated with semi-poor liquid diversion and indirect heat pump technologies reduces 41.79%.The energy saving effect of the CO₂ capture process with the integration of semi-poor liquid diversion and indirect heat pump technologies is the best.