On the absorption of ammonia exhaust gases
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Hello, fellow sea industry professionals: Our company generates a large amount of ammonia gas during its manufacturing processes. Currently, we use dilute sulfuric acid to treat this ammonia gas through ammonia absorption towers, but the effectiveness of this method is not very good; significant amounts of ammonia gas still remain in the exhaust gases. Could you suggest any effective ways to improve the rate of ammonia removal? Thank you!
It depends on the components of the ammonia gas and the desired outcome – whether simply absorbing the exhaust gases to produce a low-concentration ammonium sulfate solution, or generating ammonium sulfate as a by-product after absorption. There are also many types of absorbers, such as Venturi absorbers and various types of tower absorbers (spray towers, bubble columns, packed towers, plate towers, floating valve towers, etc.). When it comes to the efficiency of absorption, it depends on the design of these absorbers; if the design structure and operating parameters are not appropriate, the absorption efficiency will be lower.
Can’t we control the amount of ammonia in the process?
What is the exhaust air volume, and what is the ammonia concentration? What is the structure of the absorber being used, and is the circulation volume of the absorbent liquid sufficient? This problem is not difficult to solve; it might be that the size of the absorber design used is insufficient, or the operating method is incorrect. I haven’t done it specifically, but based on common knowledge, sulfuric acid is inexpensive and has a high absorption capacity, making it a fairly ideal absorbing solution
Are there any professional manufacturers in this field that you can recommend?
Simply using sulfuric acid absorption to produce ammonium sulfate is certainly not sufficient; the exhaust gases from ammonium sulfate production also need further treatment, otherwise the standards will not be met.
Simply using sulfuric acid absorption to produce ammonium sulfate is certainly not sufficient; the exhaust gases from ammonium sulfate production also need further treatment, otherwise the standards will not be met.
We have encountered this situation as well; it is recommended to add oxalic acid treatment later on to meet the emission standards.
We use ammonia in the production of our products, and the exhaust gas contains a significant amount of ammonia. At present, we have a simple absorption tank of our own; taking into account the fact that ammonia is highly soluble in water, Baffle ring fillers are used inside this absorption tank, and water is employed for the absorption process. The ammonia solution produced in the absorption tank can also be reused.
Depending on the actual purity of ammonia, it is possible to initially consider using water to absorb it and convert it into ammonia water for reuse, or to use it to produce finished products； If there are still ammonia-based desulfurization boilers in the plant, the produced ammonia water can be sent there, as it serves as the raw material for ammonia-based desulfurization. Other methods of utilization may not be feasible from an economic perspective.