【作者】 高小永； 刘艳超； 谢毅； 吕文祥； 黄德先；

【Author】 Xiaoyong Gao;Yanchao Liu;Yi Xie;Wenxiang Lyu;Dexian Huang;China University of Petroleum (Beijing),Department of Automation;Tsinghua University,Department of Automation;

【机构】 中国石油大学(北京)自动化系； 清华大学自动化系；

【摘要】 精对苯二甲酸(PTA)是用于制造聚酯纤维、薄膜等工程塑料的重要原料,是国家建设、经济发展的重要支柱之一。PTA氧化反应过程的平稳性对于直接质量控制的影响很大,需要进行模拟仿真来对实际反应情况进行指导。而在构建反应过程模型时,由于其反应机理复杂,使得在过程模拟与仿真中很容易出现变量发散的情况导致仿真失败。因此本文采用基于联立模块思想易于收敛的g PROMS作为平台进行模拟仿真,将复杂的对象模型逐级分解成多个简单模型,用这些连接起来的简单模型来替代复杂模型,实现对PX氧化反应过程的模拟仿真以及稳态、动态分析,据此得出反应过程中对二甲苯(PX)、对甲基苯甲醛(TALD)、对甲基苯甲酸(PT)、对羧基苯甲醛(4-CBA)、对苯二甲酸(TA)的浓度变化曲线,并分析讨论了温度、负荷改变对于反应过程的动态影响,从而有效的预测装置未来一段时间内的生产运行情况。更多还原

【Abstract】 Purified terephthalic acid(PTA) is an important raw material used to manufacture engineering plastics such as polyester fibers and films,and is one of the important pillars of national construction and economic development.The stability of the PTA oxidation reaction process has a great influence on the direct quality control,and simulation is needed to guide the actual reaction situation.When constructing the reaction process model,due to its complex reaction mechanism,it is easy to cause simulation failure due to variable divergence in process simulation and simulation.Therefore,this paper uses gPROMS based on the simultaneous module idea as a platform for simulation.The complex object model is decomposed into multiple simple models step by step,and these connected simple models are used to replace the complex models to realize the simulation and steady-state and dynamic analysis of the PX oxidation reaction process.Based on this,it is concluded that the reaction process is two-way.Concentration curve of toluene(PX),p-tolualdehyde(TALD),p-toluic acid(PT),and p-carboxybenzaldehyde(4-CBA),and analyzed and discussed the dynamics of temperature and load changes on the reaction process,In this way,it can effectively predict the production and operation of the device in the future for a period of time.更多还原