FIELD: chemistry.
SUBSTANCE: method and device for increasing extraction degree of helium are described. Stream containing helium and at least one oxidisable component is fed into an oxidation zone in presence of oxygen to oxidise oxidisable component to form a first vapour stream and a first liquid stream. First vapour stream is fed into an adsorption zone at variable pressure to a purified helium stream and tail gas stream. Tail gas stream is compressed. Compressed tail gas stream is fed into a membrane separation zone for formation of helium-rich permeate stream and a retentate stream. Helium-rich permeate stream is compressed and returned to oxidation system.
EFFECT: technical result is higher degree of helium extraction by post-extraction thereof from permeate.
20 cl, 1 dwg, 1 tbl, 1 ex
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