摘要
芳烃联合装置的二甲苯装置主要以对二甲苯为目标产品,主要不足是装置能耗较高。以制约二甲苯装置能效提升的共性问题为切入点,优化了二甲苯装置换热流程,降低二甲苯塔再沸炉燃料气消耗;建立了新型缠绕管换热器设计计算模型,提升换热器设计精度;同时设计了二甲苯装置低温热高效回收网络系统,显著降低了装置能耗。工业应用结果表明,改造后装置燃料气消耗量总计降低0.87 t/h,回收低温热29.56 MW,综合能耗累积降低3118.6 MJ/t,大幅提升了二甲苯装置能效,对二甲苯装置节能改造具有指导意义。
Para-xylene is the main target product in xylene unit of aromatics unit,but its energy consumption is high.Taking the common problems of restricting energy efficiency of xylene unit as the breakthrough point,the heat exchange process of xylene unit was optimized to reduce the fuel gas consumption of the reboiler of xylene column.A new type of wound tube heat exchanger was developed to improve the design accuracy of heat exchanger.At the same time,the low temperature heat recovery network system of xylene unit was systematically designed,which significantly reduced the energy consumption of the unit.The industrial application results showed that the total amount of fuel gas consumption was reduced by 0.87 t/h,the low-temperature heat was recovered by 29.56 MW,and the comprehensive energy consumption was reduced by 3118.6 MJ/t,greatly improving the energy efficiency of the xylene unit,and the energy-saving modification of xylene plant is of guiding significance.
作者
胡珺
厉勇
陈建兵
高明
Hu Jun;Li Yong;Chen Jianbing;Gao Ming(SINOPEC Dalian Research Institute of Petroleum and Petrochemicals,Dalian,Liaoning 116041)
出处
《石油炼制与化工》
CAS
CSCD
北大核心
2022年第2期23-29,共7页
Petroleum Processing and Petrochemicals
基金
中国石油化工股份有限公司合同项目(CHG20010)。
关键词
二甲苯装置
热集成
缠绕管换热器
低温热
xylene unit
heat integration
wound tube heat exchanger
low temperature heat
