PX氧化反应过程4CBA浓度的实时优化  

Real-time optimization of the 4CBA content in a p-xylene oxidation process

作　　者：邢建良[1] 蒋鹏飞[2] 钟伟民[3] 赵均[2] 邵之江[2] 钱锋[3] 

机构地区：[1]华东理工大学化工学院,化学工程联合国家重点实验室,上海200237 [2]浙江大学控制科学与工程学系,杭州310027 [3]华东理工大学化工过程先进控制与优化技术教育部重点实验室,上海200237

出　　处：《清华大学学报（自然科学版）》2012年第3期320-324,共5页Journal of Tsinghua University(Science and Technology)

基　　金：国家“九七三”重点基础研究发展计划(2012CB720500);国家自然科学基金项目(61174118);上海市重点学科建设项目(B504)

摘　　要：精对苯二甲酸(purified terephthalic acid,PTA)是重要的化工原料,对二甲苯(p-xylene,PX)氧化反应是PTA装置的核心单元,是高温高压下固液相催化氧化反应。PX氧化反应在生成粗对苯二甲酸的同时,会生成一种副产物对羧基苯甲醛(4-carboxybenzaldehyde,4CBA),4CBA会显著影响最终PTA产品的质量。实际工业运行中,对4CBA浓度的定期人工分析已不能满足装置的优化运行。该文以某大型PTA装置的PX氧化反应过程为对象,在工艺机理模型的基础上,综合应用COM(component object model)接口、数据可视化、Aspen Plus模拟优化、Honeywell PHD(process history database)等技术,实现了PX氧化反应过程4CBA浓度的实时预测与优化。工业装置应用后,PX氧化反应过程4CBA浓度实时预报精度良好,有效地监控了装置运行情况,并优化了PX氧化反应过程的运行。Purified terephthalic acid is an important chemical raw material, p xylene oxidation, which is a solid-liquid catalytic reaction process requiring high temperatures and pressures, is a core part of purified terephthalic acid plants, p Xylene can be turned into crude purified terephthalic acid by oxidation, but the byproduct 4 carboxybenzaldehyde is also generated. 4-Carboxybenzaldehydesignificantly affects the final product quality. In actual industrial operations, regular manual analyses of the 4-carboxybenzaldehyde cannot provide optimal process control. A mechanism model of a large p-xylene oxidation reaction process was used to develop a real time optimization and control system for 4-carboxybenzaldehyde using a COM （component object model） interface, data visualization, Aspen Plus modeling and optimization, and a Honeywell PHD （process history database）. This optimization and control system accurately predicts the 4-carboxybenzaldehyde content, which enhances the operating performance of the p-xylene oxidation reaction process.

关 键 词：精对苯二甲酸 对二甲苯 氧化反应 对羧基苯甲醛 实时优化 

分 类 号：TP319[自动化与计算机技术—计算机软件与理论]