Configurations and methods for offshore lng regasification...

C - Chemistry – Metallurgy – 10 – L

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C10L 3/10 (2006.01) B67D 9/00 (2010.01) F17C 7/04 (2006.01) F17C 9/04 (2006.01) F25J 3/00 (2006.01)

Patent

CA 2682684

Contemplated plant configurations and methods employ a vaporized and supercritical LNG stream at an intermediate temperature that is expanded, wherein refrigeration content of the expanded LNG is used to chill one or more recompressor feed streams and to condense a demethanizer reflux. One portion of the so warmed and expanded LNG is condensed and fed to the demethanizer as reflux, while the other portion is expanded and fed to the demethanizer as feed stream. Most preferably, the demethanizer overhead is combined with a portion of the vaporized and supercritical LNG stream to form a pipeline product.

La présente invention concerne des configurations de centrale et des procédés employant un courant de GNL vaporisé et supercritique à une température intermédiaire qui est dilaté, le contenu de réfrigération du GNL dilaté étant utilisé pour refroidir un ou plusieurs courants d'alimentation de recompresseur et pour condenser un reflux de déméthaniseur. Une partie du GNL ainsi réchauffé et dilaté est amenée au déméthaniseur en tant que reflux, tandis que l'autre partie est dilatée et amenée au déméthaniseur en tant que courant d'alimentation. De préférence, le distillat de tête du déméthaniseur est combiné à une partie du courant de GNL vaporisé et supercritique pour former un produit de pipe-line.

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