Nowadays, I have been trouble to control test condition of fin-tube heat exchanger. I think that this is based on cleaninig problem of shell and tube heat exchanger placed on auxiliary system and disassembling is very difficult, so that I have to clean it as chemical but I don't know which chemical material should be used and whether chemical may be detrimental effects on copper pipes.
Hi, these bits may help.
http://www.concosystems.com/sites/default/files/userfiles/files/techical-papers/optimizing-cleaning-heat-exchangers.pdf
https://www.youtube.com/watch?v=iIRbhZY8MpE
I do not know exactly the design and constraints of yours, but generally these bits abive may help.
Cheers,
-PakDin
If you want to use chemical cleaning method then it would be better if you ask the manufacturers regarding the chemicals.
Normally,for steel and copper tubes phosphoric and sulphamic acid is preferred and one should never use hydrochloric acid and sulphuric acid .
For the chemical removal of fouling material, weak acids and special solvents or detergents are normally used. Chlorination may be used for the removal of carbonate deposits. In cases where biofouling occurs, biocides are employed such as chlorine, chlorine dioxide, bromine, ozone and surfactants. A more usual practice, however, is by continuous or intermittent "shock" chlorination which kills off the responsible organisms.
Dear Sirs, thanks a lot for your helping and advices. I found a interesting chemical for cleaning as is shown attached file, which doesn't have any detrimental effect on copper pipes and I wish it would be useful for my installation line and I am going to share my observation after cleaning. Thanks again.
Generally - It is very important to use pure D.I. water with corrosion inhibitor, for example Nalco 199. For chemical cleaning I use weak citric acid or acetic acid.
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