Reasons for high pressure at the bottom of the ammonia vaporization tower
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May I ask what the reasons are for the high pressure in the ammonia vaporization tower? Originally, the pressure at the bottom of the tower was 29, but now it’s 80
Is it the blockage in the pipes at the top of the tower that prevents proper gas flow, thereby causing the pressure at the bottom of the tower to rise?
Consider whether there are any abnormalities in the transfer of ammonia-vaporized wastewater, and whether the liquid flowing out from the bottom asphalt sludge is normal
This post was last edited by hao101029 on 2012-4-18 21:40. Ammonia water contains impurities such as tar and asphalt, which can cause blockages and reduce the porosity of the tower plates; therefore, a air flotation tank or a tar filtration device should be installed at the source of the ammonia water. It is also possible that the alkali addition procedure was not implemented properly, causing the acid gas at the top of the tower to react and turn into salt crystals, which led to blockages in the pipes at the top of the tower. For reference only
Take a look at what the tower resistance is like; there should be several reasons for it. Please be more specific
Our recent values are also high, and the pressure at the top of the tower is high as well, but the temperature at the top of the tower doesn’t increase
The remaining ammonia water contains tar and some light floating oils; during distillation, some of these floating oils and tar accumulate on the tray surfaces, blocking them and causing an increase in tower pressure. It is less likely that salts will be vaporized, and if crystallization does occur, it generally takes place below the feed inlet. The problem with the former can be alleviated by cleaning, while that of the latter can be resolved by flushing the trays; if neither solution works, it will be necessary to shut down the ammonia evaporation tower for cleaning.
The drainage at the bottom of the tower is not smooth, resulting in a high liquid level there and consequently high pressure at the bottom of the tower.
I completely agree with the views expressed in #7, as our factory faces the same problems. All of these issues have been resolved, and it is necessary to clean the ammonia vaporization tower regularly; the upper five layers need to be removed and taken outside the tower for cleaning using hydrochloric acid.
The opinions from the 7th and 8th floors can be combined to resolve this issue
This can be resolved through chemical cleaning: first, use acid to remove the scale from the upper trays, and then use coal tar cleaner to remove the coal tar from the lower layers; before cleaning, it is necessary to remove the tar at the bottom of the tower.