Synthesis of desulfurization solvent network (DSN) can reduce the solvent circulation and the energy consumption for solvent regeneration. Based on the desulfurization process characteristics, this work proposes a novel graphic to explore the operating limitations of a desulfurization unit. A feasible operating window of the desulfurization unit is presented with three boundary lines to constrain the solvent reuse. Different cases for the solvent reuse between units are analyzed in details, and two rules for rich solvent reuse are proposed and proven. A novel hierarchical method is developed for the DSN synthesis. A refinery case is investigated using the proposed method. Four DSN designs are obtained, and the fresh solvent consumption can be reduced by 13.7 %. The accuracy of the four designs is verified by rigorous simulation, showing a maximum relative error of 1.22 %. The proposed method can show clear insights in DSN synthesis and give reliable and concise designs.

中文翻译：

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基于工艺特征的脱硫溶剂网络合成：脱硫单元的新见解和新颖的合成方法


合成脱硫溶剂网络（DSN）可以减少溶剂循环和溶剂再生的能耗。根据脱硫工艺的特点，本文提出了一种新颖的图形来探索脱硫装置的运行局限性。提出了脱硫装置可行的操作窗口，并设置了三个边界线来限制溶剂的重复使用。详细分析了单元间溶剂重复利用的不同情况，提出并证明了富溶剂重复利用的两条规则。为 DSN 合成开发了一种新颖的分层方法。使用所提出的方法对炼油厂案例进行了调查。获得四种DSN设计，新鲜溶剂消耗可减少13.7%。四种设计的精度均经过严格的仿真验证，最大相对误差为1.22%。所提出的方法可以显示 DSN 综合的清晰见解，并提供可靠且简洁的设计。