【作者】 赵辉；

【导师】 杜增智； 赵毅；

【作者基本信息】 北京化工大学 ， 化学工程（专业学位）， 2020， 硕士

【摘要】 实时优化技术是一种将严格机理稳态流程模拟与先进控制技术相结合而产生的新兴技术,通过动态优化操作参数,实现生产装置经济效益的最大化。乙烯装置作为石油化工的龙头装置,面对震荡的市场与波动的原料性质,如何在基本不改变装置硬件条件的前提下,对乙烯装置进行经济性优化成为目前行业亟待解决的问题之一。本研究以国内某石化企业乙烯装置为背景,以ROMeo作为主要技术平台,根据装置本身的特性与优化点的需求,建立乙烯装置全流程模拟模型、数据整定模型以及优化模型,并通过在线实时系统(RTS)实现模型的自动控制,闭环地为企业提升效益能力。本文系统的阐述了系统模型的搭建方法,包括裂解炉换热系统拆解、压缩机性能曲线回归、组分群划分简化模型等,提供了完整的乙烯装置在线实时优化系统建设方法;在模拟模型数据与实际数据的对比分析中,采用本方法建立的全流程模型关键参数点相对偏差小于2%,拟合程度高,能有效反映生产过程,具有较高的可信度;结合在线实时系统与ROMeo系统自整定技术,使系统具有收敛鲁棒性,在此基础之上,通过优化计算为企业带来可观的效益空间,吨乙烯效益提升在40元人民币以上;同时,本文通过优化点边际效益分析,对当前企业生产运行参数设定附加值予以分析,在优化参数的同时,指出控制边界条件的不合理设定,具有较强的指导意义。更多还原

【Abstract】 Real-time optimization technology,as an emerging technology that combines process simulation theory with advanced control technology,can maximize the economic benefits of production equipment.As the leading device of petrochemical industry,how to optimize the ethylene plant in real time under the premise that the process is complicated and basically does not need to be modified or expanded is one of the urgent problems in the petrochemical industry.This research is based on a petrochemical enterprise ethylene plant as the background,with ROMeo as the main technology platform.According to the characteristics of the plant itself and the needs of optimization points,the whole process simulation model,data tuning model and optimization model of the ethylene plant are established.This article systematically explained the method of building the system,including the disassembly of the cracking furnace heat exchange system,the regression of the compressor performance curve,the complexity deduction by simplified model using material grouping etc.Provided a complete online real-time system construction method.In the comparative analysis of simulation model data and actual data,the relative deviation of the key parameter points is less than 2%,which effectively reflects the production process and has high credibility.Combined with online real-time system and self-tuning technology,the system achieves high convergence and robustness.The optimized calculation on this basis brings considerable optimization space for the target enterprise,and the benefit of ton of ethylene is increased by more than 40 yuan.At the same time,by using margin analysis,this paper also points out the unreasonable setting of the control boundary conditions,which has a strong guiding significance.更多还原