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Published by Tamer ramzy Abd-Elsadek, Employee at Oregon Environmental Engineering, LLC
Thanks All for your support and interest,
Prem Baboo
here is attached chemical analysis for the feed water to plate and frame heat exchanger, knowing that the operating temperature ranging from 80 up to 100 degree .
Citric Acid Dosing proposal to prevent scaling depending on [decreasing pH which by the same time decrease the alkalinity and by the way decrease the scale tendency.] is this assumption true or not
??
2 Comments
Citric acid for such a purpose is also much more expensive than other acids you could use.
Published by Apostolos Kavadias, IDRO - APOSTOLOS KAVADIAS
1 Comment
it's taken into consideration because other acids will cause problems as sulphoric will increase the sulphate ions leading to more scale concentrations and HCL will increase chlorides leading to corrosion
Published by Tamer ramzy Abd-Elsadek, Employee at Oregon Environmental Engineering, LLC
This analysis is not what we asked for. It shows only that anions of strong acids (not including nitrates) concentration is extremely high, making the water highly corrossive, especially for stainless steel.
We need additionally p-alkalinity, m-alkalinity, Ca++, Mg++ and cooling liquid temperaure (what water is cooling).
In which degrees you mention the temperature (80-100)?
> Of course, citric acid will lower the m-alkalinity and pH, resulting in lower scaling, but you already have highly corrossive water and if you add more acid it will be even more corrossive. I suppose you have much corrosion under scale formations.
Published by Apostolos Kavadias, IDRO - APOSTOLOS KAVADIAS
2 Comments
about alkalinity, there is alkalinity only in HERO Reject stream but the Softener reject has no Alkalinity so, not measured
pH mentioned in the attached analysis,
this streams will be heated through heat exchanger not cooled, temperature will be exchanged with distilled water.
Published by Tamer ramzy Abd-Elsadek, Employee at Oregon Environmental Engineering, LLC
About Corrosion, it will not affect our system more because we have duplex stainless steel,
Published by Tamer ramzy Abd-Elsadek, Employee at Oregon Environmental Engineering, LLC