Discussion on the environmental impact of ammonia volatilization in caustic soda production and mitigation measures
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Discussion on the environmental impact of ammonia volatilization in the production of caustic soda and corresponding control measures. Those who have worked in caustic soda plants for several years surely have had this experience when entering the ammonium chloride production area: the strong ammonia smell is so intense that it makes one’s eyes water. Sometimes, in an attempt to hold one’s breath, one ends up inhaling an even larger amount of ammonia – one word: awful! ! The company has mentioned on several occasions that it will adopt closed-system production, by enclosing the production lines that generate ammonia fumes and then either exhausting the air through high-efficiency systems or treating it before discharge. But nothing has been done yet. I would like to ask how the production of ammonium chloride is going at the companies where your colleagues work The smell in the carbonization workshop at the filtration station is also very strong; those of us who don’t walk around the workshop often can’t stand it even when we go there occasionally. Has anyone experienced something similar?
In caustic soda production, the workshops with a strong ammonia smell generally include: carbonization, filtration, centrifugation, and crystallization. Regarding carbonization and filtration, I think it is possible to recover the gases released from the tank during carbonization, while for the ammonia odor resulting from filtration, it is necessary to control the β value entering the tower so that it is not too high. Regarding crystallization and centrifugation for removal, a strong ammonia smell usually occurs when the temperature for cold salting out is high, or during overcast and rainy weather, when the smell is particularly intense. I think the α value should not be set too high. Additionally, the ammonia smell from the ammonium chloride belt is unbearable; despite having exhaust ventilation in place, the environment remains poor
We’re even more annoyed here...... The ground is wet and it has a bad smell. It seems like attempts were made to create airflow before, but they didn’t work; let’s hear what better suggestions there are from those who know better