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建立了单根柱的低温蒸馏计算模型,对H2/HD,H2/HT和D2/DT三个双组分体系进行了计算。给出了温度和各组分浓度在柱上的空间分布,结果较好地再现了易挥发组分在柱高端浓集,而难挥发组分在柱底端浓集的分离特征。三个体系以H2/HT最易分离,H2/HD次之,D2/DT最差。对于文中研究的体系,当理论板数为80时,D2/DT不能达到脱氚率99%的分离要求。
The calculation model of single-column cryogenic distillation was established. The two-component H2 / HD, H2 / HT and D2 / DT systems were calculated. The spatial distribution of the temperature and the concentration of each component on the column is given. The results show that the volatile components are concentrated at the high end of the column, while the hard components are concentrated at the bottom of the column. The three systems were most easily separated by H2 / HT, followed by H2 / HD and D2 / DT the worst. For the system studied in this paper, when the number of theoretical plates is 80, D2 / DT can not meet the separation requirement of 99% of the detritus rate.