LNG FPSO and method for treating flash gas generated in LNG carrier when LNG is unloaded form LNG FPSO to LNG carrier

摘要

invention LNG FPSO and LNG FPSO in the LNG unloading LNG carriers in the occurrence of flash gas treatment method relates. The LNG FPSO is installed in the LNG FPSO, a plurality of the LNG storage tank for an LNG; The flash gas return line for returning the condensate to the flash gas generated in the LNG storage tank of the LNG carrier when unloading LNG into the LNG tank to LNG carrier that is not involved in the handling of the plurality of LNG tanks in the LNG tank; The flash gas is installed in the return line, a compressor for compressing the flash gas; The flash gas is installed in the return line, a heat exchanger which is compressed flash gas is heat-exchanged in the flash gas and the compressor goes to the compressor; Characterized in that it comprises a. According to this configuration, by returning condensing the flash gas generated in the LNG storage tank of the LNG carrier when unloading LNG from the LNG tank of the LNG carrier with LNG FPSO into the LNG tank that is not involved in the handling of LNG FPSO, is treated flash gas . Thus, more simple, because the capacity of the flash gas must be treated with a reduced equipment, have a complex configuration, which is installed in an existing LNG FPSO while capable of significantly reducing the capacity of the installation cost and the operation ratio consuming flash gas treatment system benefits There is. ;