| 摘要 |
PROBLEM TO BE SOLVED: To provide a large size storage tank of low temperature liquefied gas such as LNG capable of performing pressurization and transferring without using an LNG pump although a low pressure type storage tank of the low temperature liquefied gas such as the LNG required the LNG pump installed for LNG transfer, and has a problem that the LNG in the LNG pump is vaporized and causes trouble in operation, and furthermore, a pressurization type storage tank requires an increase of a thickness of a storage tank main body in order to increase a pressurizing pressure. SOLUTION: A pressurized tank 2 which is connected by an LNG storage tank 1, an LNG discharge pipe 5, and a depressurizing pipe 6 is provided in a periphery of a lower part of the LNG storage tank 1. An inside of the pressurized tank 2 is depressurized and the LNG is allowed to flow in from the LNG storage tank 1, and the inside of the pressurized tank 2 is pressurized and the LNG is discharged. The pressurization and transferring of the LNG are performed by repeating pressurization and depressurization of the inside of the pressurized tank 2.
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