초록 ▼

A process is disclosed for unloading a plurality of containers having pressurized liquefied gas contained therein. A pressurized displacement gas is fed to a first container or group of containers to discharge the liquefied gas therefrom. The displacement gas is then withdrawn from the first contain

A process is disclosed for unloading a plurality of containers having pressurized liquefied gas contained therein. A pressurized displacement gas is fed to a first container or group of containers to discharge the liquefied gas therefrom. The displacement gas is then withdrawn from the first container or group and it is separated into a first vapor stream and a second vapor stream. The first vapor stream is heated and passed to the first container or group. The second vapor stream is fed to a second container or group to discharge liquefied gas therefrom. Communication between the first container or group and the second container or group is severed and the foregoing steps are repeated for all of the containers in succession, with only the last container or group emptied of liquid remaining at the pressure of the displacement gas, and all of the containers at the end of the process except the last container or group being filled with a lower pressure vapor.

대표청구항 ▼

[ What is claimed is:] [1.] A process for unloading pressurized liquefied gas from a plurality of containers having such liquefied gas contained therein, comprising the steps of:(a) feeding a pressurized displacement gas to a first container or group of containers of said plurality of containers to

[ What is claimed is:] [1.] A process for unloading pressurized liquefied gas from a plurality of containers having such liquefied gas contained therein, comprising the steps of:(a) feeding a pressurized displacement gas to a first container or group of containers of said plurality of containers to discharge the liquefied gas therefrom;(b) withdrawing the displacement gas from the first container or group of containers and separating the displacement gas into a first vapor stream and a second vapor stream;(c) heating the first vapor stream and passing the heated vapor stream to the first container or group of containers, the pressure of the heated vapor in the first container or group of containers being substantially lower than the pressure of the liquefied gas at the beginning of the unloading process;(d) taking the second vapor stream and feeding it to a second container or group of containers of the plurality of containers to discharge liquefied gas therefrom; and(e) severing communication between the first container or group of containers and the second container or group of containers and repeating the steps (b) through (d) for all of said containers in succession, whereby only the last emptied container or group of containers remains at said pressure of the displacement gas at the end of the unloading process and all of the containers except the last container or group of containers being filled with the lower pressure vapor.