核电站硼回收系统蒸发塔分离技术研究与应用

Separation Technology and Application of Evaporation Tower in Boron Recycle System of Nuclear Power Plant

为进行核电站硼回收系统蒸发塔自主化设计,基于分离理论建立了蒸发塔塔板分离理论计算模型,分析了蒸发塔塔板硼酸溶液中硼水的分离水平,并在搭建的小型试验台架上进行试验验证分析,同时分析并给出蒸发塔塔底蒸发室雾沫夹带率的计算方法。将所研究的理论计算模型用于硼回收系统开展蒸发装置设计。结果表明:计算分析结果较好吻合试验结果,证明理论分析采用的分离方法及模型建立的正确性。所设计的硼回收系统满足核电站现场运行要求,且有较高的安全裕度。

To realize independent design of evaporation tower of boron recycle system of nuclear power plant,theoretical calculation model of evaporation tower tray separation was established based on separa-tion theory,evaporator separation level of boron water of boron acid solution was analyzed,and small scale experimental device was used for test verification and analysis.Meanwhile,the calculation method of entrainment rate of entrainment of evaporation chamber in evaporation tower bottom was analyzed and given.The proposed theoretical calculation model was used for the design of evaporation equipment in bo-ron recycle system.The results show that the numerical results agrees well with the experimental result,indicating the correctness of seperation method adopted by theoretical analysis and calculation model.The designed boron recycle system can satisfy the field operation requirement of nuclear power plant with a high safety margin.