LIQUEFACTION METHOD OF NATURAL OR OIL GAS, AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2013 - IPC F25J1/00 

FIELD: oil and gas industry.

SUBSTANCE: liquefaction method of natural or oil gas involves pre-drying from moisture, cleaning from mechanical dust, cooling of a source flow, separation of cooled gas-liquid mixture into gas and liquid, throttling of gas in a vortex tube so that cold and hot gaseous flows and liquid flow is obtained. The vortex tube is located in the cavity of the separator reservoir. Cold flow is throttled from the vortex tube and supplied to outside surface of the hot end of the vortex tube. The formed liquid phase of cold flow and additionally condensed liquid of hot flow is collected in the separator reservoir; that liquid phase and non-condensed portion of gas is separately directed to recuperation of cold for cooling of source flow of natural gas. The device includes a dryer, a filter, a heat exchanger, a vortex three-flow tube with a cooled hot tube end. The hot tube end is equipped with an annular hammer-stone in the form of a split-type toroid forming a slot outlet channel of separated liquid from a near-wall layer to outside surface of the hot tube end, to which a cold steam-liquid flow is directed from the cold tube end.

EFFECT: increasing the concentrate yield fraction.

4 cl, 4 dwg, 3 tbl