超重力强化AMP-PZ复合溶液脱碳技术及表观动力学

High-gravity intensified decarburization process and apparent kinetics of AMP-PZ composite solution

为提高工业上火电厂乙醇胺(MEA)吸收塔脱碳工艺中脱碳率和反应速率,提出了超重力技术耦合2-氨基-2-甲基-1-丙醇-对二氮己环(AMP-PZ)混合胺脱碳方法。正交实验表明:不同操作参数对脱碳率的影响显著性大小依次为:超重力因子、气液比、吸收剂质量浓度、主吸收剂含量、温度;最佳操作条件为:超重力因子为60,气液比为15,吸收剂质量分数为25%,主吸收剂质量分数为60%,温度为25℃,CO_(2)脱除率可达97.16%。相对传统的乙醇胺(MEA)吸收塔法,CO_(2)脱除率提高了7.16%。相同操作条件下,旋转填料床的脱碳反应速率常数比曝气反应装置高一倍。建立了超重力场中AMP-PZ脱碳表观动力学模型,不同操作参数对反应速率常数的显著性影响大小依次为:超重力因子>气液比>吸收剂质量浓度。

To improve the efficiency and rate of absorption process of thermal power plant for CO_(2) removal using ethanolamine(MEA),the high-gravity intensification technology was applied and coupled with 2-amino-2-methyl-1-propanol and piperazine(AMP-PZ)to absorb CO_(2) in waste gas.The results of orthogonal test showed that the significance of different operating parameters on the CO_(2) removal efficiency was in order from high to low as follows:high-gravity factor,gas-liquid ratio,absorbent mass concentration,main absorbent content and temperature.The optimal operating parameters were obtained with the high-gravity factor of 60,gas-liquid ratio of 15,absorbent mass concentration of 25%,and main absorbent content of 60%,under which the CO_(2) removal efficiency could reach 97.16%.Compared with the results of conventional absorption tower process with ethanolamine(MEA),the CO_(2) removal efficiency increased by 7.16%.The reaction rate constant for CO_(2) removal was two times that of aeration reaction equipment.A kinetic model of CO_(2) absorption by a blend of AMP-PZ was established in high gravity field.