三塔级联水精馏系统分离含氚轻水中试实验研究

Pilot scale experiment of three-column cascade water distillation facility for tritiated water separation

摘要: 针对大体量含氚水分离净化的需求，自主设计建设了三塔级联水精馏系统，内部装填有自研高性能填料。在中试实验过程中，以5～10 kg/h的处理量，完成了吨量级含氚轻水的分离处理，实现了贫化倍数高于2 000倍、富集倍数高于20倍的分离效果。测得规整填料等板高度为14 cm，散堆填料等板高度为4 cm，运行过程各关键参数稳定，全系统已稳定运行超过900 h，可满足规模化工程放大的要求。

Abstract: Aiming at the demand for separation and purification of tritiated water, a three-column cascade water distillation system has been independently designed and constructed, which is filled with self-developed high-performance packing. During the pilot scale experiment, the treatment of ton level tritiated water was completed at the processing capacity of 5−10 kg/h. The separation effect has been achieved at the detritiation factor higher than 2 000 times and the enrichment factor higher than 20 times. The height equivalent to a theoretical plate of regular packing is 14 cm, and that of random packing is 4 cm. The key parameters vary in a minuscule range during the operation, and the entire system has been running stably for more than 900 h, which can meet the requirements of large-scale engineering application.