APPARATUS FOR RE-LIQUEFACTION/PRESSURE-RISE OF BOIL-OFF GAS OF LOW-TEMPERATURE LIQUID GAS

摘要

PROBLEM TO BE SOLVED: To provide an apparatus for re-liquefaction/pressure-rise of boil-off gas, which uses a method for re-liquefying the boil-off gas by directly contacting the boil-off gas with delivered LNG and which sufficiently secures an interfacial area between both of the LNG and the boil-off gas and also can reduce pressure-rise power for rising the pressure of re-liquefied liquid to a supply pressure.;SOLUTION: The apparatus for re-liquefaction/pressure-rise of boil-off gas includes: a boil-off gas compressor 7 compressing boil-off gas generated from low-temperature liquid stored in a storage tank 3; and a mixing device 15 mixing the boil-off gas compressed by the boil-off gas compressor 7 and the low-temperature liquid delivered from the storage tank 3. The mixing device 15 includes: a diameter-reduced portion 27 where the diameter of a flow passage is reduced; a diameter-enlarged portion 29 where the diameter of the flow passage is enlarged at the downstream of the diameter-reduced portion 27; a low-temperature liquid spouting part 31 located at the upstream side of the diameter-reduced portion 27 and spouting the low-temperature liquid delivered via a low-temperature liquid delivery pipe 13; and a boil-off gas spouting part 32 located at the upstream side of the diameter-reduced portion 27 and spouting the boil-off gas compressed by the boil-off gas compressor 7.;COPYRIGHT: (C)2014,JPO&INPIT