TREATING OF LIQUEFIED NATURAL GAS Russian patent published in 2009 - IPC F25J3/02 

FIELD: oil and gas production.

SUBSTANCE: disclosed method of treating liquefied natural gas (1) for generating flow (21) of liquid with reduced contents of components with low boiling point consists in expanding liquefied gas to produce two-phase flow; in introducing two-phase fluid medium into column (10) below single section (14) of gas and liquid contacting, in withdrawing flow (17') of liquid, characterised with reduced contents of components with low boiling point, from lower part of column (16), in withdrawing gaseous flow (25), rich with components with low boiling point, from upper part (23) of column (10), in heating gaseous flow in heat exchanger (27), in compressing (30) of gaseous flow to pressure generating fuel gas and producing fuel gas (33); in separation of re-circulating flow (34a) from fuel gas; in at least partial condensation (27) of re-circulating flow, producing flow (34b) of wet reflux; in introducing flow (34b) of wet reflux into column (10) over single section (14) of contacting.

EFFECT: implementation of the invention facilitates reducing contents of components with low boiling point and also facilitates simplifying of process.

26 cl, 5 dwg