At the LNG receiving station, once unloading is complete, how is the LNG in the main pipes transferred into the large tanks? What is the driving force?
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At the LNG receiving station, once unloading is complete, how is the LNG in the main pipes transferred into the large tanks? What is the driving force?
After unloading is complete, the LNG in the unloading line remains in the main pipeline, with a low flow rate used to maintain a low temperature.
It should be possible to carry out pressure-induced purging; the pressure on the ship will definitely be higher than that in the tanks, and that’s what provides the power! If gas remains in the pipelines, it’s necessary to ensure proper vaporization and pressure relief, otherwise unexpected consequences may occur
For LNG, the pipeline’s own pressure is sufficient when it is injected into large tanks.
It can also be blown back into the tank using nitrogen
Circulating cooling must definitely be used! Otherwise, it will need to be pre-cooled again next time during unloading
Sure, it’s necessary to purge after unloading the goods! The cooling cycle continues to run as usual! The pipeline is also equipped with overpressure relief vents, which allow pressure to be released even if there are problems with the valves at either end.