Scope of pre-cooling treatment for LNG receiving pipelines
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The temperature of the receiving pipeline after LNG is regasified is around -30 degrees; does this pipeline also need to be pre-cooled?
If it has not been used for a long time or is being used for the first time, it can be run once with a tank of liquid nitrogen. If the pipeline is short, it doesn’t matter
Thank you, it’s just to use a little bit in the pipe section downstream of the carburetor as well
One more question: when introducing air into the system, with high pressure upstream, how can a large temperature drop be avoided downstream?
Control the flow rate or add an external heating device
There is control after the vaporizer; the temperature drops by 4–8 degrees per hour. The speed of this drop depends on the temperature changes in the distant and proximal areas, as well as on whether there is any temperature recovery
In other words, when filling the downstream pipeline network with NG, the pressure is adjusted from the upstream side, for example by increasing the pressure at the pump outlet, right?