What is the reason for the yellow color of the dehydration product at the top of the atmospheric pressure tower?
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The pH value of the constant-top dehydration fluid is around 6, and it is yellow in color; water, corrosion inhibitors, and ammonia are added to this fluid. Could it be that the high amount of corrosion inhibitors is the cause? I would appreciate it if the experts and specialists on this forum could help analyze the reasons.
The pH value of water undergoing constant decantation is around 6, which indicates that it is acidic water. As you mentioned, this is the cause of iron corrosion; water containing iron ions can range in color from yellow to red.
Take a sample to test the iron ion content and then make a judgment!
Yellow water turns black when it’s poured on the ground after a while, right? The pH at the top of the tower should be around 7–8, I think.
It is recommended to conduct routine analyses of sulfur-containing wastewater, including the levels of chlorine, sulfur, iron, and oil. An analysis should be carried out based on the specific conditions; however, high iron content usually causes discoloration to black, while high oil content leads to whitish emulsification.
Recently, the pH value was adjusted to around 8, and the color returned to normal. Thank you all for your guidance.