The ammonia gas extracted from the acidic water side stream has a high sulfur content, and the ammonia solution is jujube-red in color. What are some solutions to this problem?
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The ammonia gas extracted from the acidic water side stream has a high sulfur content, and the ammonia solution is jujube-red in color. What are some solutions to this problem?
Is the side stream high in sulfur? How high can it be? If it exceeds the designed range, it can be adjusted through operational measures. As for the color component, it is necessary to analyze what substances are involved; in the case of red color, iron and phenols are the most likely culprits. This issue cannot be resolved within a three-stage process, but the choice of desulfurizing agent in the ammonia purification system can be considered to mitigate it. But it’s best to address the issue by introducing acidic water at the upstream stage.
I would like to ask, where does your ammonia solution mainly go?
Increase the temperature at the side stream outlet, or try adjusting it lower.