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Process and apparatus for evaporating and heating liquified natural gas

  • US 4,036,028 A
  • Filed: 10/30/1975
  • Issued: 07/19/1977
  • Est. Priority Date: 11/22/1974
  • Status: Expired due to Term
First Claim
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1. An apparatus for evaporating and heating liquid natural gas comprisingmeans defining a predetermined flow path for a flow of liquid natural gas;

  • an open gas turbine system having an air intake and an exhaust flue for a flow of hot exhaust gases;

    a first heat exchange system for cooling air taken into said air intake and for heating the flow of liquid natural gas;

    a second heat exchange system for extracting heat from the flow of exhaust gases in said flue and for heating the flow of natural gas with the extracted heat, said second heat exchange system including a first closed piping system having a hydrocarbon heat exchange medium therein, a first heat exchanger for receiving heat from the flow of exhaust gases to heat the hydrocarbon medium, a second heat exchanger for heating of the natural gas in said flow path in heat exchange relation with the hydrocarbon medium, a compressor means downstream of said second heat exchanger in said flow path for compressing the hydrocarbon medium and a vapor turbine upstream of said second heat exchanger in said flow path for expanding the hydrocarbon medium to produce work;

    means for admixing an anti-freeze agent into said gas turbine system air intake; and

    a rectifying means for receiving and vaporizing the anti-freeze agent downstream of said air intake, said rectifying means having a head product removal line connected to a third heat exchanger in said first closed piping system for receiving heat from the flow of exhaust gas.

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