The ammonia vaporization tower has high resistance and large temperature differences; seeking help
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The resistance of the ammonia vaporization tower is 50 KPa. The pressure at the top of the tower was originally 50 KPa, but it is now around 20 KPa only. The temperature difference between the bottom, the middle section, and the top of the tower was originally 3°C; now this difference exceeds 7°C. As a result, the processing capacity of the ammonia vaporization tower has decreased. Please help
Similar situations have been encountered in other distillation columns; insufficient heating or reduced column efficiency can both lead to this issue, for reference!
It must be a decrease in tower efficiency, but the specific cause has not been identified
Filler towers are used quite frequently; in such cases, we generally clean the tower body. Most problems can be solved.
The manhole below the feed inlet was removed, and no blockage was found
If the tray is clogged, anti-clogging trays can be used
Ammonium salts have been formed; increase the steam.
It should be checked to see if there is any blockage in the downcomer. Based on the phenomenon you described, there seems to be a blockage
The sieve plate tower belongs to the bubble-type tray type, and its characteristic is easy clogging. Try following the suggestions from Haiyou on the 8th floor first; if that doesn’t work, it’s best to replace the tower tray.
There is a high possibility of blockage in the internal trays; remove the manhole for inspection