基于LPCE+CD的重水除氚和升级工艺

Heavy Water Detritiation and Upgrading Technology by LPCE+CD Process

提出了基于LPCE+CD工艺的重水除氚和升级工艺概念设计,建立了理论模型,在MATLAB平台下编制了计算程序,对整个系统的分离行为进行研究。气液摩尔比为3时,LPCE可以将重水中98.38%的T和98.35%的H转移到气相,气液摩尔比对LPCE过程有显著影响,增大气液摩尔比会显著降低顶端气体中HD和DT浓度。第1根精馏柱再沸器中DT浓缩效应显著,24 h后约为进料含氚重水的30倍。在第2根精馏柱冷凝器中,HD为主要组分,仍然含有10-11水平的DT。低温精馏系统对气体除氚率和除氢率分别为99.30%和97.75%。通过合理的系统设计,可以保持前后两级的一致性,使LPCE+CD成为非常高效的重水除氚和升级工艺。

A conceptual design was proposed for heavy water detritiation and upgrading based on LPCE＋CD process,and theoretical model was established to study the separation performance with computational program developed under MATLAB platform.About 98.38% of tritium and 98.35% of protium can be transfered from liquid phase to gas phase by LPCE process with 3 for the mole ratio of gas and liquid（rg/l）,and rg/l has a substantial effect.The enrichment of DT in the reboiler of first cryogenic distillation column is remarkble and reaches almost 30 folds that of feeding tritiated heavy water after 24 h.In the condenser of the second cryogenic distillation column,HD is dominant with DT at 10-11 level.The stripping efficiency for T and H is 99.30% and 97.75% respectively.The consistency between front-end and post-processing can be assured with proper system design,thus HD and DT can be removed simutaneously by LPCE＋CD process which is an effective method for heavy water detritiation and upgrading.