核燃料后处理过程中需要将1BP调料后溶液中残余亚硝酸脱除至一定水平,本工作基于前期的研究结果对亚硝酸脱除工艺进行了优化研究。基于φ100 mm×1 000 mm的填料柱(亚硝酸脱除设备,图1),通过实验确定了亚硝酸的脱除工艺、填料类型、气液比、脱气温度等。实验结果表明,液相连续的亚硝酸脱除效果优于气相连续,气液逆流接触的亚硝酸脱除工艺,其脱除效 In the post-treatment of nuclear fuel, it is necessary to remove the residual nitrous acid in the solution after the 1BP seasoning to a certain level. In this work, the nitrous acid removal process was optimized based on the previous research results. Based on the column of φ100 mm × 1 000 mm (nitrous acid removal equipment, Fig. 1), the nitrous acid removal process, packing type, gas-liquid ratio and degassing temperature were determined experimentally. The experimental results show that the continuous removal of nitrous acid in the liquid phase is superior to the nitrous acid removal process in which the gas phase is continuous and the gas-liquid countercurrent contact is used, and the removal efficiency