FIELD: processes or apparatus for liquefying or solidifying gases or gaseous mixtures.
SUBSTANCE: method involves cooling direct flow of compressed gas in one or two serially connected recuperative heat-exchangers; expanding thereof in expander and separating liquid phase from gaseous one; supplying gaseous phase to recuperative heat-exchanger as reverse flow. Initial gas flow before cooling is directed in vortex tube from which hot and cold flows are discharged. Cold flow is mixed with direct recuperated flow before expanding thereof or with reverse flow after liquid phase separation. Reverse flow from recuperative heat-exchanger is fed to liquefier outlet. Hot flow is cooled in outer heat-exchanger. Outer heat-exchanger is composed of two sections connected in series one to another, wherein one section is immersed in flowing water, another one is blown over with air flow.
EFFECT: increased efficiency of gas liquefaction.
13 cl, 6 dwg
