Why is air and nitrogen analyzed at the top of atmospheric-pressure liquid ammonia storage tanks?
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Our plant has atmospheric-pressure liquid ammonia storage tanks, but there are sampling points for nitrogen and air at the top of the towers; chromatographic analysis is primarily used for these samples. No analysis of air and nitrogen has been carried out on the medium-pressure storage tanks. Please advise.
At normal pressure, it is in direct contact with air; theoretically, at medium pressure, it is isolated from the outside world
Do I need to perform pickling? Could you explain it in more detail if needed? Thank you!
There is no need for pickling; after cleaning with purging and ensuring proper nitrogen displacement, ammonia can be introduced.
At normal pressure, the tank should be purged with nitrogen to ensure that an explosion will not occur, and it is necessary to check whether the concentration of air or nitrogen meets the required standards. The medium-pressure tank should be evacuated before being filled with ammonia.
Hehe, is there still liquid ammonia at normal pressure?