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Configurations and methods for offshore LNG regasification and heating value conditioning

  • US 8,695,376 B2
  • Filed: 12/20/2007
  • Issued: 04/15/2014
  • Est. Priority Date: 04/13/2007
  • Status: Expired due to Fees
First Claim
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1. A method of providing a natural gas product, comprising:

  • providing vaporized supercritical LNG at a temperature of −

    20°

    F. to 20°

    F. to an LNG processing unit;

    expanding the vaporized LNG in the LNG processing unit, and using refrigeration content of the expanded vaporized LNG to provide cooling to a first and second recompressor discharge stream and a reflux condenser to condense C2 components from a deethanizer overhead product and to thereby completely convert the expanded vaporized LNG into a heated LNG vapor stream;

    splitting the heated LNG vapor stream into a first and second vapor portion;

    condensing the first vapor portion to form a reflux stream for a demethanizer, wherein the reflux stream has a temperature sufficient for recovery of at least C2 components, and turbo-expanding the second vapor portion and feeding the expanded second vapor portion to the demethanizer; and

    producing a demethanizer overhead product, and feeding a demethanizer bottom product to the deethanizer.

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