Severe corrosion at the top of the catalytic tower
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The heat exchanger at the top of the catalytic tower is severely corroded; the water is acidic, with a pH of 8–9 and a total iron content of 12 ppm. Do any experts have any good suggestions?
Is it a condenser? Isn’t the pH of acidic water less than 7? It’s already at 8–9; by how much is the total iron level high, and in which stage is the total iron level high? I don’t understand what a catalytic tower is – could you explain it in detail? I can help analyze it for you
Is it that the effect of the neutralizing corrosion inhibitor isn’t very good? Try another one.
We have tried no less than 5 different neutralizing corrosion inhibitors, and none of them have worked well.
The total iron level should be below 5, but the current value is 12. Could you help us analyze what caused it? Neutralizing corrosion inhibitors are water-soluble; is this related to it?
Please explain the process flow and reagent types, as well as the operating conditions
What is used for neutralization? Ammonia?
The oil-water separator at the top of the catalytic split tower, after carrying out oil-water separation, detected that the iron ion content in the water was above the limit, at 12 ppm. Now, both water and ammonia are injected.
Yes, neutralizing agents and ethanolamine are added during neutralization.
For this, you can first add a slow-release agent and then ammonia, or control the amounts of both substances, or look into the technologies related to precise iron removal in condensate recovery
In this process, do the amount of water injected and the water content in the corrosion inhibitor have a significant impact on subsequent corrosion?