Circulating liquid helium re-liquefier with a pollutant emission function, pollutant emissions from the way the device, purifier to be used in the device and the transfer tube

摘要

This invention relates to a circulation type liquid helium recondensation device with a contaminant-purging function capable of vaporizing and removing contaminants deposited on the refiner in the device. Helium gas vaporizing in the liquid helium storage tank 2 is pumped by the circulating pump 7 and refined in the refiner 6. The refiner is provided with heaters and also a discharge circuit on the inflow side. The vaporized contaminants generated when the refiner 6 is heated by the heaters are pumped by the circulating pump 7 or the dedicated purge pump 8 and vented to the atmosphere via said discharge circuit. IMAGE