石油炼制与化工 ›› 2024, Vol. 55 ›› Issue (4): 79-84.

• 控制与优化 • 上一篇    下一篇

基于Aspen Plus软件的芳烃异构化工艺模拟与优化

符卓珍   

  1. 中国石化海南炼油化工有限公司
  • 收稿日期:2023-06-05 修回日期:2023-11-28 出版日期:2024-04-12 发布日期:2024-03-26
  • 通讯作者: 符卓珍 E-mail:fuzhzh1271.hnlh@sinopec.com

SIMULATION AND OPTIMIZATION OF AROMATICS ISOMERIZATION PROCESS BY Aspen Plus SOFTWARE

  1. SINOPEC Hainan Petrochemical Co. Ltd.
  • Received:2023-06-05 Revised:2023-11-28 Online:2024-04-12 Published:2024-03-26
  • Contact: Fu Zhuozhen Fu Zhuozhen E-mail:fuzhzh1271.hnlh@sinopec.com

摘要: 针对中国石化海南炼油化工有限公司第二套对二甲苯(PX)装置C8芳烃异构化反应流程,利用Aspen Plus软件建立了稳态模型,并优选Rplug模块作为反应器模块;模型验证结果表明,模拟计算值与工业实际标定值具有很好的吻合性,说明该模型预测结果合理且可靠。运用该模型进一步分析了反应温度、反应压力、进料氢烃比等工艺参数对C8芳烃异构化反应性能的影响,结果表明:优选的反应温度为347 ℃,反应压力为0.46 MPa,氢烃摩尔比为3.9;温度、压力对PX产率几乎无影响,氢烃摩尔比为3.9时PX产率最高;降低温度、升高压力和适宜氢烃比有利于乙苯(EB)转化,低温、小氢烃摩尔比和中等压力有利于减少C8芳烃损失;根据模拟优化结果调整异构化操作参数,可有效提高EB转化率、PX产率和PX的质量流量。

关键词: Aspen Plus软件, C8芳烃异构化, 稳态模拟, 对二甲苯

Abstract: A steady-state model was established by Aspen Plus software for the isomerization reaction process of C8 aromatics in the second p-xylene (PX) unit of SINOPEC Hainan Petrochemical Corporation, andthe Rplug module was selected as the reactor model.The results of model validation showed that the simulated valueswere in good agreement with the actualindustrial calibration values, indicating that the prediction results of the model were reasonable and reliable. This model was used to further analyze the influence of key process operating parameters such as reaction temperature, pressure, and feed hydrogen-to-hydrocarbon ratio on the performance of isomerization reaction. The results showed that under the promise of meeting the requirements of isomerization activity, the adjustment of pressure and temperature should conduct simultaneously. The temperature and pressure had little effect on the yield of PX.Lower temperature, higher pressure and suitable ratio of hydrogen to hydrocarbon were favorablefor ethylbenzene (EB) conversion,while lower temperature, lower molar ratio of hydrogen and medium pressure were favorable for reducing C8 aromatics loss.Optimizing the ratio of hydrogen to hydrocarbon to 3.9 could maximize the conversion of EB and the generation of PX. The optimum reaction temperature was347℃, the pressurewas0.46 MPa, and hydrogen-to-hydrocarbon ratio was 3.9.The EB conversion, PX yield and PX mass flow rate could be effectively increased by adjusting the isomerization operation parameters according to the simulation results.

Key words: Aspen Plus software, C8 aromatics isomerization, steady state simulation, p-xylene