Methods for cleaning storage tanks
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There is rust on the inner wall of a carbon steel storage tank; it has no manhole or cover, so it’s impossible to enter. The rust on the inner wall needs to be cleaned thoroughly. Considering cleaning with 5-10% hydrochloric acid, but the storage tank does not have a built-in cleaning system (omnidirectional nozzles) nor a circulation pump. I want to use a solution of hydrochloric acid at a concentration of 5-10% for soaking, but I’m not sure if that’s a good idea. If it is appropriate, how long should the soaking process last? Also, might it help if nitrogen is blown in at the bottom of the tank?
Sure, you don’t need to use nitrogen; compressed air will do, as it’s cheaper. This is similar to stirring
In a vacuum, air enters from the bottom valve, causing the liquid to churn upward.
Well said! The problem with vacuum is that the tank gets filled up, making it impossible to create a vacuum. If the tank is not filled to the top, it is not possible to ensure that the entire top of the tank is cleaned. But a buffer tank can be added to the vacuum pipeline.
I want to ask what the capacity of the storage tank is. If it’s too big, can a vacuum be used to clean it?