Method and system for producing liquefied natural gas (lng)

Details Method and system for producing liquefied natural gas (lng) Method and system for producing liquefied natural gas (lng)

F - Mech Eng,Light,Heat,Weapons

25

J

F25J 1/02 (2006.01)

Patent

CA 2746741

A method and system for optimizing the efficiency of an LNG liquification system of the gas expansion type, wherein an incom-ing feed gas is first separated in a fractionation column by counter cur-rent contact with a cold reflux fluid, and a gaseous stream introduced into the heat exchanger system at a reduced temperature such that an in-termediate pinch point is created in the warm composite curve.

L'invention concerne un procédé et un système destinés à optimiser le rendement d'un système de liquéfaction de GNL du type à détente de gaz où un gaz de charge entrant est d'abord séparé dans une colonne de fractionnement par contact à contre-courant avec un fluide de reflux froid, un flux gazeux introduit dans le système d'échangeur de chaleur à une température réduite de telle sorte qu'un point de pincement intermédiaire soit créé sur la courbe composée côté chaud.

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