What process is most effective for removing inorganic ammonium?
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This post was last edited by sunjl1981 on 2013-1-6 at 20:16. The HVM process includes a pre-treater; after brine salinization, hypochlorite and NaOH are added. In my opinion, after dissolved air is introduced, it enters the flotation tank where ammonia is decomposed and rises along with the gas, resulting in significant effects. Without a pre-treater, what methods or processes could be used to effectively remove ammonia? # ， ， &
Some literature mentions the use of air blowing as a method, and also refers to a device called an amine removal tower
What the original poster is asking is whether there is inorganic ammonium present in the saline solution? Generally, such a situation is absolutely not allowed; after all, this inorganic ammonium can enter the electrolytic cell along with the saltwater, posing a significant risk. Moreover, it is very difficult to keep the levels of ammonium, ammonia, or amines in the water below 4 ppm. Our company also has water resources of this kind, and due to the presence of ammonium in them, this water can only be discharged. Whether it’s adding sodium hypochlorite as mentioned above or using a deammonification tower, these methods are effective in cases where the ammonium concentration is high. However, they are not suitable for treating water used in chlor-alkali production. We are currently actively looking for solutions, but as of now, there is no ideal treatment method available. I also hope that experts can provide better methods.
The level of inorganic amines here is always within the upper limit; sometimes it even exceeds that limit. Control can only be achieved by adjusting the amount of sodium hypochlorite used, as well as the temperature and reaction time. The NCL3 content in the chlorine gas pipeline should remain between 40PPM and 80PPM. This value is directly related to the halide concentration. Since the brine contains around 6mg/L of inorganic amines, which manufacturer has an effective process for dealing with this issue?
If there is only a small amount of ammonia, the liquid first enters the stripping tower where the gas is acid-absorbed, and then ammonia is removed through chemical oxidation.
Our company adds hypochlorite in the baffled tank after the salt dissolving tank, and also incorporates an ammonia stripping tower into the process; the results are fairly good, though the temperature of the brine drops significantly