| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an apparatus for re-liquefying boil-off gas (BOG) of low-temperature liquefied gas, which re-liquefies the boil-off gas while suppressing required power, namely heat input into the low-temperature liquid in a tank.SOLUTION: A boil-off gas re-liquefying apparatus 1 of this invention re-liquefies boil-off gas generated from low-temperature liquid in a storage tank 3, and includes: a boil-off gas extracting pipe 5 extracting boil-off gas generated in the storage tank 3; a low-temperature liquid extracting pipe 7 extracting the low-temperature liquid in the storage tank 3; a mixing device 9 mixing the extracted boil-off gas and the extracted low-temperature liquid; a mixed liquid discharge pipe 11 discharging the mixed liquid obtained by being mixed in the mixing device 9 into the storage tank 3. The mixing device 9 includes: a diameter-reduced portion 13 where the diameter of a flow passage is reduced; a diameter-enlarged portion 15 where the diameter of the flow passage is enlarged at the downstream side of the diameter-reduced portion 13; a low-temperature liquid spouting part 17 disposed at the upstream side of the diameter-reduced portion 13 and spouting the low-temperature liquid extracted with the low-temperature liquid extracting pipe 7; and a boil-off gas spouting part 18 also disposed at the upstream side of the diameter-reduced portion and spouting the boil-off gas extracted with the boil-off gas extracting pipe 5.</p> |
