基于PROII和NSGA-Ⅱ的乙烯裂解装置急冷系统的多目标优化
Multi—objective Optimization of Quench System in Ethylene Plant based on PROII and NSGA-Ⅱ
刘立岩
作者单位：大庆石化公司化工一厂
中文关键字：急冷系统；流程模拟；NSGA-II算法; Pareto解；操作优化
英文关键字：Quench systems; Process simulation; Multi—objective optimization; NSGA-II； Pareto set; Operation optimization
中文摘要：本文利用化工流程模拟软件PROII建立了乙烯装置急冷系统的稳态仿真模型。在对大量的模拟数据进行分析后，找到急冷系统中对产品和能量有影响操作参数，并提取数据利用线性回归分析法进行模型识别，建立了以急冷系统产品分离度和换热器热量回收值最大的多目标的数学模型。采用NSGA-II算法对多目标优化模型进行求解，得到Pareto最优解集，结合生产装置实际运行情况，提出了优化操作条件。结果表明此种方法的有效性和可行性,为乙烯装置急冷系统的优化设计和操作指导提供了有效的方法。
英文摘要：This paper used a simulator PROII to build a steady state simulation mode of quench system in ethylene plant. A huge amount of simulated data was analyzed to find out the operating parameters affecting the product and energy in the quench system and extract data to model identification by linear regression method. It built the multi—objective mathematical model of enabling product resolution in quench system and heat recovery value of heat exchanger to be maximum. The NSGA-II genetic algorithm was used to solve the multi-objective optimization model and get Pareto optimal solution sets. Based on the production practice, it proposed optimized operation condition. The results showed that this method was effective and feasible. It provided a useful method to optimizing design and directing operation for quench system in ethylene plant.