| 摘要 |
PURPOSE:To easily store petroleum gas at the bottom of the water by filling a ballast with air or petroleum gas at time of receipt and shipment to float on the surface of the water and filling the ballst tank with water at time of storing to store the petroleum gas at the bottom of the water. CONSTITUTION:Adequate ballast water is poured into a ballast tank 2 of a storing tank 1 to be floated on the surface of the water, and a storing tank 3 is filled with liquefied petroleum gas through a first opening and shutting valve 6 and a pipe 5 for taking in and out liquid. After completion of filling, to open a fifth opening and shutting valve 11 disposed on the upper surface of the ballast tank causes water to go into the ballast tank 2, whereby the storing tank 1 can be sent to the bottom of the water. In case of shipping the liquefied petroleum gas in the storing tank 3, water in the ballast tank 2 is discharged by air or petroleum gas to float the storin tank 1 on the surface of the water. |
