Refrigeration – Cryogenic treatment of gas or gas mixture – Liquefaction
Reexamination Certificate
2005-08-30
2011-11-29
Jules, Frantz F. (Department: 3784)
Refrigeration
Cryogenic treatment of gas or gas mixture
Liquefaction
C062S620000
Reexamination Certificate
active
08065890
ABSTRACT:
An LNG plant is configured to receive rich LNG and to produce LPG, lean LNG, and power using at least one fractionation column, wherein the fractionation portion of the plant can be optionally thermally coupled to a power cycle utilizing residual refrigeration from the processed lean LNG. Most preferably, a liquid portion of the rich LNG is pumped to pressure and heated, and the pressurized and superheated portion is expanded to produce electric energy before being fed into the column. The column overhead vapor is partially condensed, providing column reflux for high NGL recoveries, and the residual vapor is further condensed using refrigeration content of the rich LNG forming the lean LNG product, that is further pumped to pipeline pressure and subsequently vaporized using heated working fluid of the power cycle.
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Baldridge Lukas
Fish & Associates PC
Fluor Technologies Corporation
Jules Frantz F.
LandOfFree
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