Method and apparatus for warming and storage of cold fluids

F - Mech Eng,Light,Heat,Weapons – 17 – C

Patent

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Details

F17C 5/00 (2006.01) B65G 5/00 (2006.01) F17C 3/00 (2006.01) F17C 9/02 (2006.01)

Patent

CA 2467338

Stranded natural gas is sometimes liquefied and sent to other countries that can use the gas in a transport ship. Conventional receiving terminals use large cryogenic storage tanks to hold the liquefied natural gas (LNG) after it has been offloaded from the ship. The present invention eliminates the need for the conventional cryogenic storage tanks and instead uses uncompensated salt caverns to store the product. The present invention can use a special heat exchanger, referred to as a Bishop Process heat exchanger, to warm the LNG prior to storage in the salt caverns or the invention can use conventional vaporizing systems some of which may be reinforced and strengthened to accommodate higher operating pressures. In one embodiment, the LNG is pumped to higher pressures and converted to dense phase natural gas prior to being transferred into the heat exchanger and the uncompensated salt caverns.

Du gaz naturel échoué est quelquefois liquéfié et envoyé vers d'autres pays pouvant utiliser ce gaz dans un bateau de transport. Des terminaux de réception conventionnels utilisent de grandes cuves de stockage cryogéniques pour conserver le gaz naturel liquéfié (GNL) après son déchargement du bateau. Cette invention permet de supprimer la nécessité d'utiliser des cuves de stockage cryogéniques conventionnelles pour les remplacer par des cavernes de sel non compensées destinées à stocker le produit. Cette invention peut mettre en oeuvre un échangeur thermique spécial, appelé échangeur thermique du Processus Bishop, afin de chauffer le GNL avant le stockage dans les cavernes de sel. Cette invention peut également mettre en oeuvre des systèmes de vaporisation conventionnels dont certains peuvent être renforcés pour supporter des pressions de fonctionnement supérieures. Dans un mode de réalisation de cette invention, le GNL est pompé à des pressions supérieures et converti en gaz naturel à phase dense avant d'être transféré dans l'échangeur thermique et les cavernes de sel non compensées.

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