醇胺法碳捕集再生能耗影响因素研究

The factors affecting energy consumption of MEA carbon capture

燃煤电厂为城市中CO_2的主要排放源,烟气碳捕集是实现低碳城市的最佳方案。目前,碳捕集一般采用单乙醇胺(MEA)化学吸收法。基于国内外研究现状,分析了MEA碳捕集系统能耗特性,建立了再生能耗计算模型,研究了碳捕集率、吸收剂浓度、吸收剂中CO_2负荷对再生能耗的影响。结果显示,本文再生能耗计算模型得出的碳捕集系统单位再生能耗为3.96GJ/t;再生能耗随着捕集率的升高而增大,随着MEA质量分数的增加而降低,随着吸收剂中CO_2负荷的增加而减小。

The coal-fired power plants are considered as the main source of emmision of carbon dioxide（ CO_2） in the city. The flue gase carbon capture is the best solution to achieve a city with low-carbon emission. At present,monoethanolamine（ MEA） chemical absorption method is usually used in carbon capture field. The energy comsumption characteristics of MEA carbond capture system are analyzed based on the research status at home and abroad. A calculation model for renewable energy consumption is established. The effects of carbon capture rate,absorbent concentration and CO_2 load on the regeneration energy consumption are studied. The results show that the energy consumption per unit of regeneration is calculated as 3. 84 GJ / t. The renewable energy consumption is incrased with the increase of harvesting rate,but is decreased through increasing the mass fraction of MEA and CO_2 load.