实时优化技术在催化重整装置的应用

Application of Real-time Optimization Technology in Catalytic Reforming Unit

对某炼厂1.8Mt/a催化重整装置实施实时优化技术。在线近红外分析仪对重整进料及重整生成油组成进行分析,对比化验室数据整体偏差小于5%。应用Aspen Plus软件建立催化重整装置严格机理模型,同时依据装置实际运行数据对重整反应器模型参数进行校准,关键参数校准结果偏差小于3%。建立实时优化系统与DCS系统、APC系统的通讯,基于装置机理模型,以芳烃收率最大为优化目标,优化计算重整反应温度、氢油比及各个分馏塔操作温度,结果通过AspenOnline软件输出至对应APC控制器实现闭环优化控制。对实时优化系统进行效果标定,标定结果显示装置芳烃收率提高0.87%,装置单位产品能耗降低2.012 kg标油,年增加效益达2259.291万元。

The real-time optimization technology was applied for the 1.8 Mt/a catalytic reforming unit.The on-line near infrared analyzer was used to analyze the composition of feed and reformate of CCR unit,and the overall deviation of the data in the laboratory was less than 5%.Aspen Plus was applied to establish a strict process mechanism model,and the reactor model parameters were calibrated according to the data of the operating conditions of the unit.The calibration deviation was less than 3%.The real-time optimization system was established to communicate with DCS system and APC system.Based on the process mechanism model,the maximum yield of BTX(benzene,toluene,xylene)was taken as the optimization objective.The optimization results were put into use through Aspen Online in a closed-loop way.By adjusting the reforming reaction temperature,the ratio of hydrogen to oil and operating temperature of each fractionating column,the purpose of real-time optimization was achieved.The real-time optimization system was calibrated for effectiveness,and the calibration results showed that the aromatics yield of the device increased by 0.87%,and the energy consumption per unit product of the device decreased by 2.012 kg of standard oil,resulting in an annual increase in benefits of 22.593 million yuan.