The Helium Purifier at NSRRC maintains high helium purity crucial for research. It has two stages: the first removes moisture at 80 K using a Vessel and Tube Heat Exchanger with a Crystal Filter, and the second uses carbon derived from coconut shells to eliminate nitrogen, oxygen, and oil contaminants. High-pressure helium passes through a Moisture Separator, heat exchangers, and a Charcoal Vessel in a closed-loop system, ensuring efficient purification.

We developed a cryogenic helium purification system that reduces impurities from 25000 PPM to under 2 PPM. Key features include 80K-activated carbon for adsorption, a Crystal Filter for removing high-freezing-point impurities, and a Phase Separator Vessel for fine particle elimination. Operating in liquid nitrogen, the system uses a tube-in-tube heat exchanger for helium cooling and recovery, optimizing purity and energy efficiency.

Our large-scale cryogenic helium purification system has significant industry applications. It reduces helium impurities from 25000 PPM to below 2 PPM, meeting the needs for superconducting cooling in particle physics, improving image accuracy in MRI systems, ensuring gas quality in semiconductor manufacturing, and supporting liquid fuel cooling in aerospace. By providing high-purity helium, our system enhances operational efficiency and equipment reliability across these sectors.