基于NSGA-Ⅲ算法的低温甲醇洗主吸收塔温度分布优化  

Optimization of temperature distribution in main absorption tower for rectisol based on NSGA-Ⅲ algorithm

作　　者：秦钰鑫 梅毅[1,2,3] 文章楠 聂云祥 翟持 QIN Yuxin;MEI Yi;WEN Zhangnan;NIE Yunxiang;ZHAI Chi(Faculty of Chemical Engineering,Kunming University of Science and Technology,Kunming 650500,Yunnan Province,China;Yunnan Provincial Key Laboratory of Energy Saving and New Materials for Phosphorus Chemical Industry,Kunming 650500,Yunnan Province,China;Yunnan Phosphorus Resources Technology Innovation Centre,Kunming 650500,Yunnan Province,China)

机构地区：[1]昆明理工大学化学工程学院,云南昆明650500 [2]云南省磷化工节能与新材料重点实验室,云南昆明650500 [3]云南省磷资源技术创新中心,云南昆明650500

出　　处：《化学工程》2025年第3期7-12,64,共7页Chemical Engineering(China)

基　　金：国家自然科学基金资助项目(22068019);云南省重大科技专项(202202AG050001)。

摘　　要：低温甲醇洗是一种很有前途的、高效的酸性气体去除净化工艺,但该工艺存在冷能耗高的特点。从工艺温度最低设备主吸收塔温度分布出发,通过Aspen Plus与Python联合仿真实现针对主吸收塔基于NSGA-Ⅲ遗传算法的参数优化。在综合考虑主吸收塔净化能力和能耗的情况下,针对主吸收塔塔板分布进行优化,尽可能地提高主吸收塔的净化能力,降低工艺能耗及成本。结果表明:当主吸收塔脱硫段、脱碳段(粗吸段、主吸段、精吸段)塔板分布方案为20-8-4-6时,主吸收塔冷公用工程用量降低了69.4 kg/h,成本降低了38.9美元/a;低温甲醇洗完整工艺的热公用工程能耗降低了10.76%、冷公用工程能耗降低了16.97%、总公用工程能耗降低了14%,投资成本下降了45600美元,设备成本下降了17100美元,安装成本下降了43300美元,证明该优化方法的可行性。Rectisol is a promising and efficient purification process for acid gas removal,but the process is characterized by high cold energy consumption.Starting from the temperature distribution of the main absorption tower,which is the equipment with the lowest process temperature,the parameter optimization of the main absorption tower based on NSGA-Ⅲ genetic algorithm was achieved through the joint simulation of Aspen Plus and Python.Under the comprehensive consideration of the purification capacity and energy consumption of the main absorption tower,the optimization was carried out for the plate distribution of the main absorption tower to improve the purification capacity of the main absorption tower as much as possible and reduce the energy consumption.The results show that when the main absorption tower desulfurization section,decarbonization section(coarse suction section,main suction section,fine suction section)tower stages distribution scheme is 20-8-4-6,the main absorption tower cold utility consumption reduces by 69.4 kg/h,and the cost reduces by 38.9 dollars/a.The whole rectisol process of the hot utility energy consumption reduces by 10.76%,cold utility energy consumption reduces by 16.97%,the total utility energy consumption reduces by 14%,the investment cost reduces by 45600 dollars,the equipment cost reduces by 17100 dollars,and the installation cost reduces by 43300 dollars,which proves the feasibility of the optimization method.

关 键 词：低温甲醇洗 主吸收塔 Aspen Plus 模拟 遗传算法 

分 类 号：TQ546.5[化学工程—煤化学工程]