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建立了一套结合实验数据获得精馏柱总理论板数的计算方法。以天然氢为原料的分离实验,计算得出的总理论板数在20～30之间;以丰度0.001为原料的分离实验,计算得出的总理论板数为24。在总理论板数较小时,冷凝器中氘丰度将随时间增长,引起系统脱氘率下降。利用所建立的理论模型分析了两次H2/HD低温精馏分离过程的动态行为,再沸器中氘丰度变化实验值与理论值吻合很好。在实验过程中,液氢液位、温度等运行参数存在扰动,有可能给测量数据带来影响。
A set of experimental data was established to calculate the total theoretical plate of distillation column. In the experiment of separation from natural hydrogen, the total number of theoretical plates calculated is between 20 and 30. The total number of theoretical plates calculated based on the separation experiment with an abundance of 0.001 is 24. When the number of theoretical plates is small, the abundance of deuterium in the condenser will increase over time, causing the deuterium removal rate of the system to drop. The theoretical model was used to analyze the dynamic behavior of two H2 / HD cryogenic rectification processes. The experimental values of deuterium abundance in the reboiler agree well with the theoretical values. During the experiment, there are disturbances in the operating parameters of liquid hydrogen level and temperature, which may affect the measurement data.