液态锂锡合金中微量氢的提取

Trace Hydrogen Extraction From Liquid Lithium Tin Alloy

为了完成混合堆包层氚提取系统的工程设计,依据气体与液态金属接触的动力学数学模型,推导了锂锡合金中氚被载带的近似数学表达式,并以氢模拟氚,利用载带法对液态锂锡合金中的微量氢进行了提取。结果表明,载带法对液态锂锡合金中氢的提取有效,锂锡合金1 kg时He的最佳流速在4 L/min左右;在He流速相同的情况下,温度和载带次数对氢的提取效率影响显著,温度越高,载带次数越多,氢的提取效率越高,823 K下经过6次载带后氢的提取效率达到85%。

In order to finish the design of tritium extraction system（TES） of fusion fission hybrid reactor（FFHR） tritium blanket,involving the dynamic mathematical model of liquid metal in contact with a gaseous atmosphere,approximate mathematical equation of tritium in lithium tin alloy was deduced.Moreover,carrying process used for trace hydrogen extraction from liquid lithium tin alloy was investigated with hydrogen being used to simulate tritium in the study.The study results indicate that carrying process is effective way for hydrogen extraction from liquid lithium tin alloy,and the best flow velocity of carrier gas is about 4 L/min under 1 kg alloy and temperatures and carrying numbers are the main influencing factors of hydrogen extraction efficiency.Extraction efficiency increases with increasing temperature and carrying number.Hydrogen extraction efficiency can reach 85% while the alloy sample is treated 6 times at 823 K.