Bubbling constantly occurs in the spraying tank during sulfur-based fertilizer production
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My workshop has two 100,000-ton sulfur-based units, and recently I noticed that bubbles kept forming in the spraying tanks, which required the addition of water and significantly affected production efficiency. Analysis suggests that there could be two reasons for bubbling: one is the decomposition of urea, and the other is incomplete reaction of potassium salts, with further reactions occurring due to the high temperature in the tube. Our process is tube reverse-evaporation, followed by flash evaporation, then to the spraying tank for spray granulation. Those with similar processes, please help. Thank you!
Bubbling in the spraying tank is relatively rare, but it does occur in some acid mixing tanks; this is mainly due to issues with monoammonium phosphate. If that doesn’t work, consider adding a small amount of antifoaming agent – it is often used in the neutralization and circulation systems for diammonium phosphate, and it works very well.
It’s not a problem with monoammonium phosphate; bubbles are formed when urea reacts with sulfuric acid, and adding some used oil will solve it
We’ve tried adding used oil before, but it didn’t work well. I’ll give it another try secretly tomorrow. Thank you.
Why is urea added to the slurry trough? Is there no urea coating machine?