Maintenance of low-temperature liquid storage tanks
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Maintenance issues for low-temperature liquid storage tanks: After a air separation unit is shut down for an extended period of time, liquid oxygen and liquid nitrogen gradually evaporate. What effects does the complete evaporation of these liquids from the storage tanks have on the low-temperature tanks? Are there any special maintenance tasks required? What preparations are needed before driving next time? Thank you.
For liquid oxygen, it is recommended to drain it completely and then rewarm it in order to prevent the accumulation of hydrocarbons. If possible, nitrogen can be introduced to maintain pressure; when using it again, simply fill it with liquid to replace the contents. The liquid nitrogen storage tank can be periodically refilled with liquid nitrogen to maintain its cooled state, thereby avoiding the need for pre-cooling and replacement before reuse. Of course, it is also possible to drain the contents after it has warmed up and then fill it with nitrogen to maintain pressure~~
After the gaseous products in the liquid nitrogen and liquid oxygen storage tanks had evaporated, the entire facility came to a stop, as there was no more nitrogen or oxygen available. If it’s completely emptied, how should one operate the vehicle next time, and what are the disadvantages?
Don’t you have a spare nitrogen tank? Some way can be found to direct flow through it for nitrogen sealing~~If it’s a small medium-pressure vacuum storage tank, simply drain the liquid and restore the temperature~~In that case, pre-cooling and purging isn’t very complicated either~~
There is still a small amount of liquid oxygen and liquid nitrogen that has not evaporated yet; therefore, do not exhaust the gaseified nitrogen and oxygen completely in order to maintain a safe pressure level. I’m not sure if this is feasible When it’s time to drive, the issue is just the temperature; there’s no need for replacement – it should be safe
Liquid nitrogen is fine; for liquid oxygen, the issue is the accumulation of hydrocarbons after evaporation~~
So how should I handle my current situation?
What size is the container, and how much liquid is inside? Try to sell it as much as possible~~
The tanks aren’t large; those with a capacity of 10 cubic meters or 20 cubic meters are also in short supply
What is a jar used for usually? ? If the bottle is filled using an liquid oxygen pump, there should be no problem.