氦气内纯化器分析与实验

Analysis and experimental study of helium internal purifier

在不增加冷源氦气消耗前提下以提高氦气纯化器的污氦气处理能力为目标,分析了氦气内纯化的工作过程.优化了氦气内纯化器新流程,利用液化杂质冷量可有效降低冷源氦气消耗量,有利于扩展内纯化器低纯度氦的处理范围.设计了一台氦气内纯化器并开展了相关实验,结果表明:新内纯化器可将氦气纯度约为92.0%的污氦气提纯至99.999%高纯氦气;相较于现有商用氦气内纯化器,优化后内纯化器流程在不降低冷源氦气消耗的前提下,使得污氦气处理范围由氦气纯度95.0%扩展到92.0%.当高纯氦气产量不低于180 L/min时,冷源消耗量约32 L/min,冷源氦气消耗量降低约54.3%,新的内纯化器流程有利于提高为内纯化器提供冷量的氦液化器的液化量.

In order to achieve the purification of lower purity helium without increasing the helium consumption,the working process of helium internal purifier was analyzed.A new process for helium internal purifier has been optimized,and it has been proven that the utilization of liquefied impurities can effectively reduce the consumption of cold source helium.Based on the analysis results,a helium internal purifier was designed and used to carry out helium purification experiments.The experimental results show that the internal purifier can increase the purity of dirty helium from about 92.0%to 99.999%,expanding the range of impurity treatment compared to the original internal purifier from helium concentration 95.0%to above 92.0%without reducing the cold helium consumption.When the production of high purity helium was not less than 180 L/min,the cold helium consumption was about 32 L/min,and it was reduced by about 54.3%compared to that of unused impurities.