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I am working in DHT Plant diesel hydrotreater unit and face a proplem with Tempered water system that show the Iron High in Tempered Water System and make Troubleshooting we drain the system many time and make chemical cleaning some time it gone ,but after time it come High
we Drain the system completely to remove any residual contaminants and Isolate the amine sample coolers for one week and cleaning and Add N-2819M to achieve a molybdate.
how do we solve this problem with the Iron and PH.
What is the source of the iron coming ??!!
 
Answers
14/02/2014 A: David Kujawski, Refinery Water Engineering & Associates Inc, dk@refinerywater.net
I'm sure it is corrosion product. The question is where are the major locations where corrosion is taking place? Does steam interface with the Tempered Water system? If so, that would be a prime suspect. Condensed steam can be very corrosive. Molybdate might not be effective in corrosion protection for where it is applied. Our firm would be happy to try and help.