How to maintain a distillation tower during long-term shutdowns
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Dear sea friends, I would like to ask that when a distillation tower is not in use for an extended period of time, in addition to the usual steps of draining the liquid inside the tower, cleaning it with water, and then sealing it up. Are there any other requirements? Are there any relevant standard operating procedures? Personally, I think after cleaning, the main focus is on how to implement anti-corrosion measures; everyone is welcome to share their opinions.
Protection is provided using low-pressure nitrogen at around 50 KPA; it is necessary to wash and dry the equipment and pipelines afterward. Last edited by brainandrain on 2008-12-23 14:32.]
If it is for corrosion prevention, just fill it with some nitrogen to maintain positive pressure
It is best to use a boiling tower; after draining, purge it with dry nitrogen. Then seal with nitrogen to maintain positive pressure. Prevent air from entering. .
If not used for an extended period, the equipment and pipelines need to be thoroughly cleaned and then completely dried. If it’s a semi-dry device, it will break down even faster
No special maintenance is generally required; if the unit is left parked for an extended period, it is best to clean it by boiling the tower, then purge it with nitrogen and seal it.
Short-term parking: No further treatment is required, except for draining the water-containing materials during winter. Prolonged shutdown: During summer, protection is achieved by maintaining a slight positive nitrogen pressure; in winter, the water is drained and then protection is provided through nitrogen sealing. If the material is somewhat corrosive, it can be steamed and then dried, with a slight positive nitrogen pressure applied to prevent corrosion.
The method is as follows: isolate it from the system, carry out thorough processing, dry it with nitrogen and create a slight positive pressure, and regularly check the pressure levels. If needed, yellow glycerin can be applied to valves, screws, bolts, and other similar components over time to prevent rusting that could make it difficult to open them later
First, purge the pipes with steam; then use compressed air to remove any remaining liquid in the pipes. Finally, maintain pressure with nitrogen to slow down corrosion of the pipeline equipment, thereby ensuring the safety of such equipment!
It is sufficient to maintain a slight positive pressure inside the equipment using nitrogen. If it is left for too long, it is recommended to have it checked once a year. If necessary, perform a pressure test and an airtightness check.
Drain the medium, replace with soft water, dry with nitrogen – done. (Your company must be very wealthy to be able to shut down the distillation tower for such a long time?) Or one in use and one as a backup? ）