Regarding the issue between water and ammonia! ! !
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Hello everyone! I have a question that I don't understand. We have a unit here where gas is deamminated. The method is to wash it with water. Is the principle between them that ammonia dissolves in water? Or is there some other mechanism? Also, after ammonia is dissolved in water, what method should be used to remove ammonia from the water?
Ammonia is very soluble in water with a solubility of 700:1. Ammonia in water can be solved by distillation. It can be done by heating it with steam. It is not difficult.
The principle is to take advantage of the solubility of ammonia in water. Ammonia in water can be separated by distillation, but some manufacturers directly use it to produce ammonia for sale.
Basic knowledge in physical chemistry, the poster must have often skipped classes before, hehe
Reply 4# The lone wolf from East Hubei never skipped classes when he went to college! But I have never attended a class! I don’t know anything about materialization! Regret! ! !
The concentration of ammonia water absorbed by the ammonia absorption tower is generally very low, depending on the ammonia content in the gas and the flow rate of the absorbed water. The cost of making low-concentration ammonia water into high-concentration ammonia water (such as 18% ammonia water) with economic benefits is relatively high. It requires another concentration tower and even a certain amount of gas ammonia ratio needs to be added. Moreover, there is no guarantee that the ammonia content of the gas at the top of the ammonia absorption tower will be lower than the directly absorbed ammonia concentration. Our company sends this dilute ammonia water to the gasification coal mill for adjusting the pH value. However, for some reasons, the coal mill does not need ammonia water. Now it is changed to the method mentioned above to make 15% ammonia water and sent to the power plant for desulfurization. The poster's process may not be the same as mine. If it needs to be handled separately, Changzhou Juyue Water Environmental Protection Technology, which we have contacted before, can handle it. Their process is to use denitrification agent to blow off, and then add sulfuric acid to make sulfuric acid anhydride. But the one-time cost is high, requiring millions and one more material.: Sulfuric acid is equivalent to a small ammonia that leads to a complete production process.
Reply 7# chenziang12 I agree with you. It is not easy to distill ammonia water to obtain high-index gas ammonia, and the amount of steam consumed should be quite large, which is also distressing.