基于NaOH碱溶液泡点温度随浓度变化明显的特性，建立单效两级压缩、双蒸发器分级压缩和二效两级压缩3种MVR蒸馏系统，并利用Aspen Plus软件进行了仿真研究。结果表明，固定工况下，双蒸发器分级压缩系统存在最优蒸汽压缩分配方案使系统新鲜蒸汽消耗量最低；二效两级压缩MVR系统运行费用低于单效两级压缩和双蒸发器分级压缩MVR系统，且蒸发水量越大优势越明显，但蒸汽压缩机总体积流量大于双蒸发器分级压缩系统，实际应用时需综合考虑蒸汽压缩机的投资成本进行系统选择。

Based on the characteristics that the bubble point temperature of NaOH alkali solution changes obviously with the concentration, three kinds of MVR distillation systems are established, including single effect two-stage compression system, double evaporator staged compression system and two effect two-stage compression system.They are simulated by means of Aspen Plus software.It is shown that under the fixed working conditions, there exists an optimal steam compression distribution scheme in double evaporator staged compression system, which makes the fresh steam consumption of the system the lowest.The operation cost of two effect two-stage compression MVR system is lower than those of single effect two-stage compression MVR system and double evaporator staged compression MVR system, and the larger the amount of evaporation water, the more obvious its advantage.However, total volume flow of the steam compressor of two effect two-stage compression MVR system is larger than that of double evaporator two-stage compression MVR system.In practical application, the investment cost of steam compressor shall be comprehensively considered in selecting the system.