Configurations and methods of integrated ngl recovery and...

Details Configurations and methods of integrated ngl recovery and... Configurations and methods of integrated ngl recovery and...

F - Mech Eng,Light,Heat,Weapons

25

J

F25J 3/00 (2006.01)

Patent

CA 2614404

Contemplated plants include a NGL recovery portion and a LNG liquefaction portion, wherein the NGL recovery portion provides a low-temperature and high- pressure overhead product directly to the LNG liquefaction portion. Feed gas cooling and condensation are most preferably performed using refrigeration cycles that employ refrigerants other than the demethanizer/absorber overhead product. Thus, cold demethanizer/absorber overhead product is compressed with the turbo-expansion and delivered to a liquefaction portion at significantly lower temperature and higher pressure without net compression energy expenditure.

L'invention concerne des installations comprenant une partie de récupération de NGL et une partie de récupération de LNG, la partie de récupération de NGL fournissant un produit de tête à basse température et à haute pression, directement à la partie de liquéfaction de LNG. Le refroidissement et la condensation du gaz d'alimentation interviennent plus préférentiellement au moyen de cycles de réfrigération faisant appel à des réfrigérants autres que le produit de tête déméthaniseur/absorbant. Le produit de tête déméthaniseur/absorbant est ainsi comprimé avec la turbo-détente et est délivré à la partie de liquéfaction à une température suffisamment basse et à pression suffisamment élevée sans dépense d'énergie de compression nette.

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