UNIT FOR PURIFYING HELIUM-CONTAINING MIXTURES Russian patent published in 1994 - IPC

FIELD: chemical industry. SUBSTANCE: unit for purifying helium-containing mixtures from impurities has spiral countercurrent heat exchanger 1, surrounding the outer shell of Dewar flask 3. The hollow of Dewar flask provides for the liquid nitrogen bath 4 in which condenser 5 is disposed wound on the adsorber 6 shell. Condensate collector 7 with separator 8 is disposed at the bottom part of adsorber 6. Adsorber 6 is suspended to lid 10 which is mounted on flange 11. Throttle valve is secured on the lid. Pipes 13 and 14 are extended through the lid. The heat exchanger has external thermal insulation 15 having shell 16. EFFECT: compactness of the unit, reducing the liquid nitrogen consumption due to reducing the losses of the cold to the environment, maintenance facility. 3 cl, 1 dwg