Improved process for liquefaction of natural gas

Details Improved process for liquefaction of natural gas Improved process for liquefaction of natural gas

F - Mech Eng,Light,Heat,Weapons

25

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F25J 3/02 (2006.01) B23K 9/173 (2006.01) B23K 35/30 (2006.01) B60K 15/03 (2006.01) C22C 38/00 (2006.01) C22C 38/04 (2006.01) C22C 38/06 (2006.01) C22C 38/08 (2006.01) C22C 38/12 (2006.01) C22C 38/14 (2006.01) C22C 38/16 (2006.01) F17C 1/00 (2006.01) F17C 1/14 (2006.01) F17C 3/00 (2006.01) F17C 3/02 (2006.01) F17C 7/00 (2006.01) F17C 7/02 (2006.01) F17C 13/00 (2006.01) F17D 1/08 (2006.01) F25J 1/00 (2006.01) F25J 1/02 (2006.01)

Patent

CA 2292708

This invention relates to a process for liquefying a gas stream rich in methane and having a pressure above about 3103 kPa (450 psia). The gas stream is expanded to a lower pressure to produce a gas phase and a liquid product having a temperature above about -112 °C (-170 °F) and a pressure sufficient for the liquid product to be at or below its bubble point. The gas phase and the liquid product are then phase separated in a suitable separator, and the liquid product is introduced to a storage means for storage at a temperature above about -112 °C (-170 °F).

Cette invention se rapporte à un procédé servant à liquéfier un flux de gaz riche en méthane et ayant une pression supérieure à 3103 kPa (450 psia) environ. Le flux de gaz est expansé à une pression inférieure, pour produire une phase gazeuse et un produit liquide ayant une température supérieure à -112 DEG C (-170 DEG F) environ et une pression suffisante pour que le produit liquide se trouve à son point d'ébullition ou à une température inférieure à ce point d'ébullition. La phase gazeuse et le produit liquide sont ensuite séparés en phase dans un séparateur approprié et le produit liquide est introduit dans un moyen de stockage servant à son entreposage à une température supérieure à -112 DEG C (-170 DEG F) environ.

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