| 摘要 |
PCT No. PCT/EP96/02760 Sec. 371 Date Dec. 23, 1997 Sec. 102(e) Date Dec. 23, 1997 PCT Filed Jun. 21, 1996 PCT Pub. No. WO97/01069 PCT Pub. Date Jan. 9, 1997A method is provided to liquefy and treat natural gas containing components having low boiling points, the method includes: liquefying natural gas in a main heat exchanger; cooling the liquefied gas in an external heat exchanger; allowing the cooled liquefied gas to expand dynamically; introducing the expanded fluid in the upper part of a fractionation column; allowing the liquid of the expanded fluid to flow downwards thorough contacting section; withdrawing a liquid recycle stream which is passed through the heat exchanger to obtain a heated two-phase fluid; introducing the two-phase fluid in fractionation column, and allowing the vapour to flow through the contacting section; collecting the liquid of the two-phase fluid in the lower part of the fractionation column; and withdrawing therefrom a liquid product stream having a reduced content of components having low boiling points; and withdrawing from the fractionation column a gaseous stream which is enriched in components having low boiling points.
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