SPEED-UP NOZZLE FOR GAS RELEASE, GAS RELEASE SYSTEM OF OFFSHORE STRUCTURE, OFFSHORE STRUCTURE AND GAS RELEASE METHOD OF OFFSHORE STRUCTURE

摘要

To provide a speed-up nozzle for gas release, a gas release system of an offshore structure, the offshore structure and a gas release method of the offshore structure capable of preventing a gas from falling into a production facility area of the offshore structure on its release even if a released gas from an oil storage tank is heavier than the air, and of avoiding an adverse effect on production activities due to the released gas, for the offshore structures such as an FSO and an FPSO.SOLUTION: A speed-up nozzle 20 for gas release is configured to suck an outer surrounding air Air due to the suction effect of the injection of a released gas Gin entering from an inlet side and to release a gas into the atmosphere by making the outlet flow velocity of a mixed gas Gout faster than the inlet flow velocity of the released gas while diluting the released gas Gin with the surrounding air Air to make the mixed gas Gout by mixing the surrounding air with the released gas Gin.SELECTED DRAWING: Figure 1