| 摘要 |
The present invention relates to a liquefied gas treatment system, comprising: a liquefied gas storage tank connected to a fueling source by a liquefied gas fueling line; and a liquid nitrogen storage tank to cool down the liquefied gas storage tank wherein the liquid nitrogen storage tank is connected to the liquefied gas storage tank by an evaporation nitrogen discharge line and a liquid nitrogen discharge line, supplies evaporation nitrogen to the liquefied gas storage tank through the evaporation nitrogen discharge line before bunkering, and supplies liquid nitrogen to the liquid nitrogen storage tank through the liquid nitrogen discharge line by which an inner temperature of the liquefied gas storage tank is maintained at a temperature state capable of making initial liquefied gas in an over cooling state at the time of bunkering. In accordance with the present invention, the treatment system of liquefied gas cools down the liquefied gas storage tank by the evaporated liquid nitrogen (evaporation nitrogen) and the liquid nitrogen such that the inner temperature of the liquefied gas storage tank before bunkering liquefied gas is maintained at a state below a boiling point of liquefied gas, by which an initial liquefied gas can be made to an over cooling state at the time of subsequent bunkering. Therefore, evaporation gas can be prevented from being generated inside the liquefied gas storage tank, and installation work hours can be reduced because a separate system to process evaporation gas is not included. |
