| 摘要 |
PURPOSE:To prevent moisture in the atmosphere from entering into a low temperature storage tank to protect adiabatic thermal insulating material against damage, and to shorten a warm up time by warming up the storage tank by means of inert gas used for its precool down or the exclusion of activated gas inside the storage tank. CONSTITUTION:A pipe line comprising a suction pipe 7, blower 8, heater 9, and an oil pipe 3 is provided for the forced circulation of inert gas 5 such as low temperature nitrogen gas used for the precool down of a low temperature storage tank 1 for LNG and the like at the period of its construction. The inert gas 5 in the low temperature storage tank 1 is drawn in by the blower 8, and heated by the heater 9, and then again fed into the low temperature storage tank 1 to be circulated. Thus, the inert gas expanded by a warm up is discharged into the atmosphere through a pressure regulating nozzle 10. |
