NATURAL GAS LIQUEFACTION DEVICE Russian patent published in 2020 - IPC F25J1/00 F25B9/04 

FIELD: oil and gas industry.

SUBSTANCE: invention can be used for the liquefaction of natural gas and associated gas utilization by liquefaction. Proposed device comprises gas feed line, three vortex tubes with heated and cooled gas discharge lines communicated via cascade via cooled gas lines. Device also contains a vortex-type heat exchange mixer, a liquefied gas discharge line and a condensate collection tank. Vortex-type heat exchanger is arranged on hot gas discharge line from three vortex tubes and discharge of part of cooled gas from separation units. Throttles are installed on the cooled gas discharge lines from the vortex tubes, and the hot gas discharge lines from the vortex tubes and the cooled gas part from the separation units are connected to the inlet of the first vortex tube. First two vortex tubes are equipped with separation units installed on outer diameters of diaphragms, and are equipped with gas discharge lines and mechanical impurities discharge lines connected to mechanical impurities collection tanks.

EFFECT: high efficiency of processing natural gas or associated petroleum gas by successive liquefaction and separation phase separation with simultaneous removal from undesirable impurities.

1 cl, 2 dwg