FIELD: low-temperature treatment of natural gas in processing it at works and fields. SUBSTANCE: gas flow is first cooled in recuperative heat exchanger, separated from condensed liquid, expanded at reduced temperature in wave compression generation mode, heated at cold recuperation and is partially evacuated beyond process; energy of compression waves is brought to flow remaining in process which is to be compressed; this flow is at least 10 percent of mass of expanded flow. EFFECT: enhanced efficiency. 2 cl, 2 dwg
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