How to discharge and replace gas in the low-pressure system of urea production using the CO2 stripping method?
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How should tower sealing shutdown and tower draining shutdown be carried out?
Low-pressure systems have buffer tanks for discharge; they are replaced only during maintenance. It’s not clear what exactly the original poster wants to ask
Is it to directly discharge the low methane refrigerant level into the ammonia tank, and use the return fluid to circulate from the low methane refrigeration system back to the ammonia tank?