芳烃联产装置生产对二甲苯工艺的全流程模拟优化  

Simulation and optimization of whole process of p-xylene production in aromatics co-production unit

作　　者：田子玉 曹志凯[1] 周华[1] TIAN Ziyu;CAO Zhikai;ZHOU Hua(College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,China)

机构地区：[1]厦门大学化学化工学院,福建厦门361005

出　　处：《厦门大学学报（自然科学版）》2024年第1期94-101,共8页Journal of Xiamen University：Natural Science

摘　　要：[目的]为了整体把握对二甲苯(PX)全流程生产工艺状况并实现优化,利用Aspen Plus流程模拟软件建立了芳烃联产装置生产PX工艺全流程的稳态模型.[方法]以C8的富集和分离功能进行分区以简化建模过程,并以产品质量和能耗为目标对重要操作参数进行优化,然后利用Aspen Energy Analyzer对该工艺进行能量衡算和燃料气排放计算.[结果]所建模型的模拟结果与原工艺流程高度吻合,可对工艺流程进行操作优化;优化后重整稳定塔的塔顶压力为1.7 MPa,抽提蒸馏塔进料溶剂比为2.8,苯塔、甲苯塔、抽余液塔和成品塔的回流比分别为2.0,2.9,1.0和1.1;通过能量衡算计算出优化调整后的节能潜力达10.33%,预计节省能耗费用可达3 950万元/年;计算出全流程生产燃料气118万吨/年,若将其作为生产化工产品的原料而非燃料,即可减少572万吨/年的CO_(2)排放量.[结论]应用Aspen Plus流程模拟软件实现芳烃联产装置生产PX全流程的模拟和操作参数的优化,从全局能量优化和CO_(2)排放角度提出改进方案,可达到节能降耗的目标.[Objective] Under the policy of "Carbon Neutral" and "Carbon Peak",energy saving and consumption reduction in the petrochemical industry are eternal themes.After overall process energy optimization and efficiency improvement,improving the weakest point in energy utilization emerges as a potential strategy.This approach represents an optimal path towards reducing energy consumption and cutting cost in the chemical industry.It is expected that process operation optimization will be realized based on models if the entire process can be accurately simulated.However,the optimization of the entire process,as well as the simulation and optimization of the complete p-xylene production process,have not been achieved.In order to propose a strategy for enhancement from the perspectives of global energy optimization and CO_(2) emission reduction,and with the aim of achieving the goal of energy reducing and usage reduction,this study developed a steady-state process model for the entire process of the p-xylene aromatics co-production plant using Aspen Plus process simulation software.[Methods] In this research,Aspen Plus process simulation software was used to construct a steady-state process model for the entire process of a p-xylene aromatics co-production plant.To establish the basis for the optimization of aromatics production operations,two functional areas were initially created.Subsequently,the impact of key operating parameters,such as solvent ratio and separation tower reflux ratio,on product quality and unit energy usage was investigated.To fulfill the objective of energy savings and consumption reduction,the energy consumption and fuel gas emission of the entire process model were calculated,and optimization strategies were proposed from the perspective of energy optimization and CO_(2) emission reduction.[Results] The simulation results of the built model are highly consistent with the original process flow,rendering them suitable for subsequent processes.Following optimization,the top pressure of the reforming st

关 键 词：对二甲苯 流程模拟 工艺优化 节能降耗 

分 类 号：TQ241.13[化学工程—有机化工]