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采用ASPEN Plus软件建立柴油加氢双塔分馏系统机理模型,在此基础之上,以汽油终馏点、柴油95%馏出温度、汽提塔塔底含硫量三个质量指标为约束,以重沸炉出口温度、汽提蒸汽量、分馏塔进料温度等8个可调参数为操作变量,建立了汽柴油总产值最大和系统能耗最小为同步优化目标的多目标优化模型。采用多目标列队竞争算法求解该模型,得到该模型的Pareto最优解集。根据Pareto解所对应各方案的产品分布情况,可确定不同优化方案下的操作参数。本文所提出的方法对柴油加氢双塔分馏系统的操作优化与节能具有参考意义。
ASPEN Plus software was used to establish the mechanism model of diesel hydrogenation double-column fractionation system. Based on this, the three end-point of gasoline, the 95% distillation temperature of diesel oil and the sulfur content of the bottom of stripper were taken as constraints Re-boilers export temperature, steam stripping steam, fractional tower feed temperature and other eight adjustable parameters for the operating variables, the maximum total output value of gasoline and diesel and the minimum system energy consumption for the simultaneous optimization of multi-objective optimization model. The multi-target alignment algorithm is used to solve the model, and the Pareto optimal solution set of the model is obtained. According to the Pareto solutions corresponding to the distribution of products in various scenarios, to determine the operating parameters of different optimization programs. The proposed method has reference significance for the operation optimization and energy saving of diesel hydrogenation double-column fractionation system.