Patent ID: 6658892
Filing Date: 2003-12-09
Classification: F25J

Abstract:
A natural gas liquefaction system comprising:(A) two or more dependent trains, each of said dependent trains comprising a cryogenic heat exchanger system for cooling a feed gas to a cryogenic temperature; (B) a common flash valve or common hydraulic turbine for reducing the pressure of the cooled feed gas to produce liquefied natural gas at substantially atmospheric pressure and a temperature of substantially âˆ’162Â° C. (âˆ’260Â° F.) (â€œLNGâ€ ) and a reject gas; (C) a common flash tank for receiving said LNG and said reject gas from said common flash valve or common hydraulic turbine and wherein said LNG and said reject gas are separated, said common flash tank having a liquid outlet and a vapor outlet; (D) at least one storage tank for receiving said LNG from said liquid outlet of said common flash tank; and (E) means for disposing of said reject gas received from said vapor outlet of said common flash tank.