摘要
本文通过Aspen Plus模拟软件建立了水泥窑烟气相变吸收剂碳捕集工艺模型,通过该模型,对水泥窑烟气相变吸收剂碳捕集工艺进行了工况分析、灵敏度分析、工艺优化分析等计算,掌握工艺过程中的关键工艺参数对工艺系统的影响规律,摸清楚工艺特点,为工程实践提供理论依据和数据支持。根据模拟计算的分析结果,得到以下几点结论:①PZ配比控制在5%,MDEA控制在30%即可;②吸收剂进料温度控制在30℃为宜;③吸收塔填料高度10m;④建议再生温度控制在100℃以下,高过100℃,再生能耗会显著提高;⑤基于以上筛选的关键工艺参数,MDEA+PZ体系相变吸收剂再生能耗在2.59GJ/tCO_(2),结合工艺改进及优化,当贫富液换热温差控制在5℃,采用富液分级流工艺,分级流比例控制在5%时,相变吸收剂的再生能耗为2.36GJ/tCO_(2)。
In this paper,a carbon capture process model of phase change absorber for cement kiln flue gas was established by Aspen Plus simulation software,the working condition analysis,sensitivity analysis and process optimization analysis of carbon capture process of phase change absorber for cement kiln flue gas were carried out to master the influence of key process parameters on the process system,understand the process characteristics,and provide theoretical basis and data support for engineering practice,according to the analysis results of simulation calculation,the following conclusions are obtained:1.PZ ratio control at 5%,MDEA control at 30%;2.The feed temperature of the absorbent should be controlled at 30℃.3.The height of the packing of the absorber should be 10m.4.It is suggested that the regeneration temperature should be controlled below 100℃,and over 100℃,the regeneration energy consumption will be increased significantly 5.Based on the above selected key process parameters,the regeneration energy consumption of phase change absorber in MDEA+PZ system is 2.59GJ/tCO_(2).Combined with the process improvement and optimization,when the temperature difference between rich and poor liquid was controlled at 5C,the technology of rich liquid graded flow was adopted,the regeneration energy consumption of the phase change absorber was 2.36 GJ/tCO_(2) when the ratio of the staged flow was controlled at 5%.
出处
《中国水泥》
CAS
2024年第10期35-41,共7页
China Cement
