制冷剂制冷效果与其配比复杂程度相互制约,使制冷剂的合理配比问题成为C3/MRC液化工艺中的难点之一。依据混合制冷剂中不同组分在不同温区制冷的原理,初步选定混合制冷剂的基本组成为N_2、CH_4、C_2H_4、C_3H_8、n-C_4H_(10)和n-C_5H_(12)。通过HYSYS模拟得到制冷效果,分析得出各组分在制冷过程中的作用。在此基础上,设计正交实验并得出模拟结果,采用逐步回归的方法回归多项式,以比功耗作为目标函数进行优化分析,最后得到优化配方。此方法简单高效、准确性好,具有较高的工程应用价值。 Refrigerant refrigeration effect and the complexity of the ratio of mutual constraints, so that the ratio of refrigerant to become a C3 / MRC liquefaction process difficult one. Based on the principle of refrigeration of different components in mixed refrigerants in different temperature zones, the basic composition of the initially selected mixed refrigerants is N_2, CH_4, C_2H_4, C_3H_8, n-C_4H_ (10) and n_C_5H_ (12). Through the HYSYS simulation of the cooling effect, the analysis of the components in the cooling process. On this basis, the orthogonal experiment is designed and the simulation results are obtained. The polynomials are regressed by stepwise regression, and the power consumption is taken as the objective function to optimize the analysis. Finally, the optimal formulation is obtained. This method is simple and efficient, with good accuracy and high engineering application value.