摘要
本文建立了氢同位素低温精馏分离的动态模型,利用该模型针对D2/DT体系计算获得了精馏柱上DT浓度的动态变化和空间分布;研究了再沸器滞留量、回流比等参数对系统分离性能的影响。回流比的提高可以显著地提高脱氚率;再沸器中DT浓度不但与滞液量存在显著的依赖关系,而且随时间增长而增长。在理论板数为80时,塔顶与塔底DT浓度相差约3个数量级,分离效果明显。
A dynamic theoretical simulation model was built to study cryogenic distillation separation of hydrogen isotopes. Dynamic behavior of DT concentration was obtained. The effects on separation performance of parameters such as reboiler holdup and reflux ratio were studied. The result indicates that the increase of reflux ratio brings about a substantial improvement of the system detritiation efficiency. DT concentration in reboiler is related with time and reboiler holdup, and dynamic calculation shows that DT concentration in reboiler increases almost linearly with time under the proposed operation mode in this paper. The separation performance is satisfactory with 80 stages as the DT concentration in reboiler is enriched 1000-fold compared with that in condenser.
出处
《核技术》
CAS
CSCD
北大核心
2007年第4期294-296,共3页
Nuclear Techniques
关键词
氢同位素
低温精馏
氚
Hydrogen isotopes, Cryogenic distillation, Tritium
