초록 ▼

A method is disclosed for unloading a plurality of containers containing pressurized liquefied gas in which the liquefied gas has a temperature above -112.degree. C. A pressurized displacement liquid is fed to a first of the plurality of containers to discharge the pressurized liquefied gas therefro

A method is disclosed for unloading a plurality of containers containing pressurized liquefied gas in which the liquefied gas has a temperature above -112.degree. C. A pressurized displacement liquid is fed to a first of the plurality of containers to discharge the pressurized liquefied gas therefrom. The displacement liquid is then pumped from the first container to a second container of the plurality of containers to discharge liquefied gas therefrom. As the displacement liquid is removed from the first container, the space caused by the removal of the displacement liquid is filled with a vapor at a lower pressure than the pressure of displacement liquid. Fluid communication between the first second containers is then severed and the above steps are repeated for all containers in succession, except that for the last container in the series the displacement liquid is pumped therefrom to an auxiliary container for storage rather than to another container.

대표청구항 ▼

[What is claimed is:] [1.](a) feeding a pressurized displacement liquid to a first of said plurality of containers to discharge the pressurized liquefied gas and ullage gas therefrom, said displacement liquid having a pressure greater than the pressure of the liquefied gas;(b) pumping the displaceme

[What is claimed is:] [1.](a) feeding a pressurized displacement liquid to a first of said plurality of containers to discharge the pressurized liquefied gas and ullage gas therefrom, said displacement liquid having a pressure greater than the pressure of the liquefied gas;(b) pumping the displacement liquid from the first container to a second container of the plurality of containers to discharge liquefied gas therefrom and filling the void space in the first container created by removal of the displacement liquid with a vapor at a lower pressure than the pressure of displacement liquid in the second container; and(c) severing fluid communication between the first container from the second container and repeating steps (a) and (b) for all of said containers in succession until all of the containers are emptied of the liquefied gas and filled with the lower pressure vapor, except that for the last container the displacement liquid is pumped therefrom to an auxiliary container.