摘要
乙烯裂解炉是乙烯装置核心设备,但至今缺乏对其开车投料非稳态过程的研究。鉴此,基于乙烯裂解炉开车投料过程的运行特点和工艺参数变化规律,建立非稳态过程裂解炉出口温度(COT)与碳烃进料流量、汽烃比和燃料气流量复合数学模型,构建非稳态过程分段控制逻辑和参数循环监测方法,基于工业装置的DCS控制系统开发人机交互系统,实现乙烯裂解炉开车投料非稳态过程的平稳运行。测试结果表明,自动化投料系统可大幅降低裂解炉开车投料阶段COT的波动,同时使碳烃进料和燃料气流量变化更平稳。
The prolysis furnace is a key apparatus in the ethylene plant.However,the study on the unsteady process of start-up and feeding was not enough so far.Therefore,based on the running characteristics of the furnace in the feeding process and the relationships among its different operation variables,a composite model of the coil outlet temperature(COT)relating to the flow rate of hydrocarbon feed,the ratio of dilute steam to hydrocarbon flows and fuel flow was proposed.The piecewise logic control method for unsteady process and the real time monitoring strategy were designed.An automatic system for hydrocarbon feeding was developed based on the field DCS control system,and the unsteady process of feeding controlled by the developed system in this work ran well.The testing results showed that the automatic control system could greatly reduce the fluctuation of COT and make the change of the hydrocarbon and fuel gas flow more stable.
作者
李佳书
朱晔
孙天一
李进龙
LI Jia-shu;ZHU Ye;SUN Tian-yi;LI Jin-long(School of Petrochemical Engineering,Changzhou University,Changzhou Jiangsu 213164,China)
出处
《辽宁化工》
CAS
2020年第11期1371-1374,共4页
Liaoning Chemical Industry
基金
国家自然基金项目(项目编号:21878025)。
关键词
裂解炉
非稳态过程
乙烯
自动化投料
自动控制
Pyrolysis furnace
Unsteady process
Ethylene
Automatic feeding
Automatic control
