What is the purpose of the halide mixing tank in membrane-based denitration?
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In membrane-based denitration, the concentrated nitrate salt solution that has passed through the nanofiltration membrane is pre-cooled before being fed into the brine mixing tank; after a second pre-cooling step, it then enters the freezer. What is the purpose of sending it to the brine mixing tank? Why not send it directly to the freezer after pre-cooling? What else is added to the brine mixing tank aside from the concentrated nitrate salt solution? . .
I was wrong; after pre-cooling, the concentrated nitrate-containing brine enters the settler. It is the freezer that freezes the low-nitrate brine, right? . .
Is this question too childish? . . Why is no one paying attention to me?
In the brine mixing tank, the rich-nitrate water undergoes a sedimentation process; the resulting lean-nitrate water overflows. The sedimented rich-nitrate water is then frozen to cause crystallization, and after centrifugation, sodium sulfate is obtained