How to improve the ammonia recovery rate in acid water stripping units?
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Recently, the load on my unit has not been able to increase, and the ammonia recovery rate is low. On one hand, this might be due to insufficient load on the ammonia compressor; on the other hand, there could be issues with the parameters of the third-stage condenser. Could you provide a detailed explanation? ! !
I have been doing simulations of acid water stripping recently. Injecting a small amount of caustic soda at the bottom of the tower to raise the pH value can help desorb ammonia from the acidic water. However, too much caustic soda cannot be injected, as this will result in an excessive amount of hydrogen sulfide at the bottom of the tower.
For level 3, the general pressure should be controlled at around 0.2 MPA and the temperature around 60 degrees; this probably also depends on the ammonia nitrogen content in your feed water