BOG RE-LIQUEFYING DEVICE IN LOW TEMPERATURE LIQUEFIED GAS TANK

摘要

PROBLEM TO BE SOLVED: To high-efficiently absorb a surplus of BOG generated in a low liquefied gas tank by low temperature liquefied gas. SOLUTION: A BOG return pipe 8 is branched and mounted on a BOG withdraw pipe to withdraw BOG from a low temperature liquefied gas tank 1. The BOG return pipe 8 is inserted in the low temperature liquefied gas tank 1 and a lower end outlet part 8a being a tip is opened to in low temperature liquefied gas 2 near a tank bottom. A net 12 is attached to the lower end outlet part 8a. When surplus BOG flows through the BOG return pipe and is injected in the low temperature liquefied gas 2 through the lower end outlet part 8a, the BOG forms small air bubbles 13 through a flow of it through the mesh of the net 12 for injection. Since the foam diameter of the injected BOG is small, a contact area with the low temperature liquefied gas 2 is increased by an amount equivalent to the decrease of the foam diameter and the BOG is high-efficiently liquefied.