An automatic apparatus for the concentration of the neon-helium mixture

The paper describes an apparatus providing enriched to 65-70 % neon-helium mixture from the ZhA-300 air separation facility. To ensure the normal operation of the facility it is necessary to evacuate the liquid nitrogen condensing during neon-helium mixture enrichment. A device has been developed that allows the liquid nitrogen level in the collection cavity of the dephlegmator, required for the normal operation of the apparatus, to be maintained automatically. The supply of liquid nitrogen to the vessel with the dephlegmator is also automatic. The apparatus provides the neon-helium mixture with a concentration of 65-70 % at a rate of 20 l/h, 5 l/h of liquid is nitrogen being used. The separation coefficient obtained is 0.85