【作者】 梁超；

【导师】 张泉灵；

【作者基本信息】 浙江大学 ， 控制工程， 2013， 硕士

【摘要】 催化重整是石油炼制与化工的关键技术,用于生产高辛烷值汽油调和组分和芳烃,同时可副产大量的氢气。对于复杂的催化重整过程,流程模拟技术的应用能带来显著的经济效益。本文主要研究了催化重整过程的反应机理、重整反应器模型建立以及模型参数估计等内容,针对国内某芳烃型催化重整装置建立了相应的反应器模型,基于所建立的模型对催化重整反应器进行了模拟分析与操作参数优化。具体包括以下几个方面内容：基于催化重整反应机理的研究,利用集总方法,针对芳烃型催化重整装置,提出了一个包含三十八个集总组分、九十九个反应的催化重整反应器模型。该模型的反应网络较全面地考虑了烷烃、环烷烃及芳烃之间的反应关系,覆盖了重整反应过程中的大部分反应。研究了催化重整反应器模型参数估计的方法。由于重整反应模型待估参数过多,为了降低模型参数估计的难度,通过合理假设,将待估参数数量减少至99个,并将复杂的反应网络依据碳原子数划分为C6～C11+六个反应子网络,再采用BFGS算法与SQP算法相结合的分组迭代估计方法以降低参数估计的误差。在确定模型参数之后,使用实际工业数据对模型进行了验证,结果表明模型能够对反应产物组成进行较准确的预测。使用所建立的模型对某炼油厂催化重整装置反应器的产物与温度分布进行了模拟,并分析了反应器温度、氢油比、液时空速以及反应压力对于产品收率的影响,最后对操作参数进行了优化计算。更多还原

【Abstract】 Catalytic reforming which produces high-octane petrol and aromatics is an important process in petrochemical industry. The application of process simulation in catalytic reforming process can bring great economic benefits. In this dissertation, the reaction mechanism of catalytic reforming process, modeling of catalytic reforming reactor and parameter estimation method was studied. A new model of catalytic reforming reactor was developed, and this model was used to simulate the reaction process and optimize the operation parameters. The main contents are as follows:1) This paper developed a new kinetic model for catalytic reforming reactions base on the lumping theory and catalytic reforming reaction mechanisms. The developed model thoroughly analyzed the mutual reaction relationships among paraffin, cycloparaffin and aromatics, and covered most related reactions included in the Continuous Catalytic Reforming progress.2) In order to resolve the challenges of the parameter estimation, the number of estimated parameters was decreased to99through reasonable supposition and the originally complex reaction network was split into several simpler sub-networks according to the number of carbon atoms. An iteration method combined of BFGS and SQP algorithms was then implemented to increase the accuracy of the parameter estimation. The developed model was used to simulate a Continuous Catalytic Reforming reactor for verifying the model accuracy. And the simulation result showed that the model successfully predicted the reformate composition in the reactor.3) The developed model was used to simulate the distribution of products、the profile of reaction temperature and the impact of industrial operation conditions. And the process optimization was studied based on the model.更多还原