Re-liquefaction Unit of Natural Boil-Off Gas

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PURPOSE : An apparatus for re-liquefaction of natural gas is provided to prevent infiltration of heat by supplying low temperature nitrogen used as a refrigerant in an outer tube of a liquid discharging pipe.CONSTITUTION : An apparatus(1) for re-liquefaction of natural gas comprises the followings : a re-liquefaction unit(10) connected to cargo space; a nitrogen expanding unit(11) connected with a low pressure nitrogen supplying pipe(21) and the re-liquefaction unit; a natural gas droplet separator(12) connected to the re-liquefaction unit; a transferring pump(17) flowing the re-liquefied natural gas into the cargo space again from the droplet separator; an inflow interception valve(16); a liquid discharging pipe(150) of a double pipe type; and a nitrogen inflow pipe(151) for insulation.© KIPO 2009