惠州石化有限公司连续重整装置工艺流程模拟与优化

Process simulation and optimization for CNOOC Huizhou company's continuous reforming unit

以惠州石化有限公司200×10~4t/a连续重整装置为研究对象,采用英国先进技术公司KBC的流程模拟软件Petro-SIM,建立了预加氢部分、重整反应部分以及重整全流程模型,以期优化装置操作条件,改善装置的生产瓶颈。应用该模型分别对重整加权平均反应入口温度以及重整装置的3条分馏塔进行了优化分析。模拟结果得出,重整加权平均反应入口温度在520.7~521.7℃时,重整操作条件最优;预加氢产物汽提塔底温度在235℃、塔压在1.01MPa、进料温度在171℃时达到最佳的分离效果;重整脱戊烷塔塔压在1.02MPa、重整脱丁烷塔塔压在1.0MPa时塔的操作最优。通过实施优化措施,将重整加权平均反应入口温度由517.7℃提高至521℃,可增产芳烃2.7×10~4t/a,氢气1.126×10~7m^3/a;分别将汽提塔塔压、脱戊烷塔塔压以及脱丁烷塔塔压由1.1MPa降至1.0MPa,共节约燃料气3.528×10~6m^3,多回收C6环烷烃2.306×10~4t/a。核算装置效益,全年可实现节能效益197.9万元,提升装置经济效益3128.8万元。

Using the Petro-SIM software,technicians established the pretreatment model,the catalyticreforming reaction model and the complete continuous catalytic reforming(CCR)process model whichreflecting the actual operating conditions of200×104t/a reforming unit in Huizhou company of Chinanational offshore oil corporation(CNOOC).The results showed that the reforming conditions are optimalwhen the inlet temperature at520.7-521.7℃.The hydrogenation product stripper’s bottom temperature at235℃,the pressure at1.01MPa and the feed temperature at171℃.The best separation effect was obtained.The operation of the column is optimal when the reforming depentanizer’s pressure is at1.02MPa and thereforming butane tower’s pressure at1.0MPa.The models were applied to the analysis of reactortemperature and three fractionation columns,such as increasing the average weighted temperature from517.7℃to521℃,the aromatics increased by2.7×104t/a and hydrogen increased by1.126×107m3/a.Thepressures at the top of stripper tower,depentanizer and the butane tower were reduced from1.1MPa to1.0MPa respectively.The flue gas was decreased by3.528×106m3and C6naphthenic increased by2.306×104t/a.Effective measures have been adopted to improve the operation of reforming unit,energy savings for the unit totaled1.979million yuan and annual economic benefits totaled31.288million yuan.