FIELD: process engineering.
SUBSTANCE: in compliance with one version, nitrogen regeneration system comprises tank for multistage separation to extract nitrogen from cooled flow of natural gas. At least, a portion of obtained flow containing nitrogen escaping the tank for multistage separation can be used as a coolant and processed at nitrogen regeneration plant and/or used as a fuel gas for natural gas liquefaction plant.
EFFECT: higher efficiency of separation.
34 cl, 4 dwg
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