What causes the high levels of total cyanide and thiocyanate in the ammonia vaporization residue?
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In the ammonia vaporization process, the total cyanide content in the remaining ammonia water is 300–500 mg/L, while the thiocyanate content is 1000–1300 mg/L, which severely affects the biochemical parameters. I would like to know what causes this? It wasn’t high before; it started to rise in the past few months.
What is the oil content in the remaining ammonia water?
110 before ammonia water flotation, 97 before entering the tower
Has any other wastewater entered the ammonia system recently, and have there been any changes in the process?
A new type of high-efficiency catalyst for desulfurization. It was said that no desulfurization waste liquid would be generated, but in reality, residual ammonia water along with cyanide and thiocyanate ended up appearing
During coal coking, carbon reacts with ammonia under dry distillation conditions, which also produces cyanides
This is due to changes in the coking process, which have led to an increase in cyanide levels
Do you use pre-negative pressure desulfurization? It should be the gas condensate from after the desulfurization tower that goes into the remaining ammonia solution
110 before flotation, 97 before entering the tower? The air flotation device isn’t working at all