在众多天然气液化工艺流程中,混合制冷剂天然气液化流程因其流程简单、效率高等特点得到广泛应用。混合制冷剂的制冷效率与其组成复杂程度相互约束,使制冷剂的合理配比成为限制MRC液化工艺发展的瓶颈。综合前人研究成果,初步选定其组分,通过正交实验获取实验样本,运用HYSYS流程进行模拟计算;以比功耗值作为目标函数,运用SVM法优化分析,最终得到最优混合制冷剂配比。通过对比验证,优化效果显著。该方法操作简单、高效、准确性好,具有较高的工程应用价值。 In many natural gas liquefaction process, mixed refrigerant natural gas liquefaction process because of its simple process, high efficiency characteristics are widely used. Refrigeration efficiency of the mixed refrigerant and the complexity of the composition of each other constraints, so that a reasonable ratio of refrigerant to limit the development of MRC liquefaction process bottleneck. According to the results of previous researches, the components were selected preliminarily, and the experimental samples were obtained through orthogonal experiments. The HYSYS process was used to simulate the calculation. The specific power consumption was taken as the objective function and SVM method was used to optimize the analysis. Finally, Ratio. Through the comparison and verification, the optimization effect is remarkable. The method has the advantages of simple operation, high efficiency, good accuracy and high engineering application value.