摘要
针对当前化学吸收法碳捕集工艺运行能耗高、余热利用不充分的问题,在分析不同碳源运行结果差异性的基础上,采用单因素分析法,确定了不同参数对工艺指标的影响,在再生塔后端耦合了有机朗肯循环发电工艺,实现了工艺节能目标。结果显示,化学吸收法可以适应不同碳源条件下的碳捕集工作,当烟气作为碳源时,碳捕集率最高,但脱碳单位能耗也最大;当MEA进塔温度维持在35℃,MEA进塔压力维持在0.3 MPa,富液进塔温度维持在90℃,富液进塔压力维持在常压,回流比维持在1.5,碳捕集率从最初的90.3%提高至96.5%,脱碳单位能耗从1.46 GJ/t降低至1.37 GJ/t;选择R152a作为循环工质发电时,净发电功率为32.6 kW,可节约年成本20.6万元。
Aiming at the problems of high operating energy consumption and insufficient utilization of waste heat in the current chemical absorption carbon capture process,based on analyzing the differences in the operating results of different carbon sources,the single-factor analysis method is adopted to determine the influence of different parameters on the process indicators.The Organic Rankine cycle power generation process is coupled at the back-end of the regeneration tower,achieving the energy conservation goal of the process.The results show that the chemical absorption method can adapt to the carbon capture work under different carbon source conditions.When the flue gas is used as the carbon source,the carbon capture rate is the highest,but the unit energy consumption for decarbonization is also the largest.When the MEA tower inlet temperature is maintained at 35℃,the MEA tower inlet pressure is maintained at 0.3MPa,the rich liquid tower inlet temperature is maintained at 90℃,the rich liquid tower inlet pressure is maintained at atmospheric pressure,and the reflux ratio is maintained at 1.5,the carbon capture rate will increases from the initial 90.3%to 96.5%,and the unit energy consumption for decarbonization will decrease from 1.46 GJ/t to 1.37 GJ/t.When R152a is selected as the circulating working medium for power generation,the net power generation capacity is 32.6 kW,which can save an annual cost of 206000 yuan.
作者
赵英男
ZHAO Yingnan(No.3 Oil Production Plant of Daqing Oilfield Co.,Ltd.)
出处
《石油石化节能与计量》
2026年第1期83-88,共6页
Energy Conservation and Measurement in Petroleum & Petrochemical Industry
关键词
碳捕集
发电工艺
碳捕集率
脱碳单位能耗
循环工质
carbon capture
power generation process
carbon capture rate
unit energy consumption for decarbonization
circulating working medium
