对二甲苯装置异构化单元热高压分离工艺研究

石油炼制与化工 ›› 2015, Vol. 46 ›› Issue (1): 78-82.

对二甲苯装置异构化单元热高压分离工艺研究

薄德臣¹,张英¹,徐向荣²,徐宏^1,3

1. 中国石化抚顺石油化工研究院
2. 中国石油扬子石化芳烃厂 3. 华东理工大学

收稿日期:2014-06-11 修回日期:2014-07-31 出版日期:2015-01-12 发布日期:2014-12-18
通讯作者: 薄德臣 E-mail:bodechen@163.com
基金资助:
中国石油化工股份有限公司合同项目

FEASIBILITY OF HOT HIGH-PRESSURE SEPARATION PROCESS IN ISOMERIZATION UNIT OF PX COMPLEX

Received:2014-06-11 Revised:2014-07-31 Online:2015-01-12 Published:2014-12-18

摘要/Abstract

摘要： 针对目前对二甲苯(PX)装置异构化单元普遍采用冷高压分离工艺导致装置用能不合理的现状，分析了采用热高压分离工艺的优势以及采用热高压分离工艺需要注意的问题；建立了能够准确分析异构化反应产物的分析方法，利用ASPEN PLUS流程模拟软件对热高压分离工艺过程进行了模拟计算，结果表明，采用热高压分离工艺对循环氢浓度几乎没有影响；通过热高压分离工艺的工业应用证明了该工艺是可行的；提出了采用热高压分离工艺后的对二甲苯装置能量优化匹配方案，并通过流程模拟进行了热量核算，结果表明采用新的流程可使370 kt/a的PX装置能耗下降627 MJ/t

Abstract: Cold high-pressure separation process is now widely used in isomerization unit of PX complex, and results in an unreasonable energy consumption of PX complex. The advantages and the problems when using hot high-pressure separation process are analyzed. An accurate method for determination of isomerization product distribution is established. The hot high-pressure separation process is simulated by ASPEN PLUS, and the results indicate that recycle hydrogen concentration is almost not changed, compared with cold high-pressure separation process. Hot high-pressure separation process is proved to be feasible by industrial practice. The energy optimization scheme is proposed, and the simulation proves that the energy consumption of 370 kt/a PX complex can be reduced by 627 MJ/t.

薄德臣张英徐向荣徐宏. 对二甲苯装置异构化单元热高压分离工艺研究[J]. 石油炼制与化工, 2015, 46(1): 78-82.