first of all, you have to ...
Published by manuel testoni, Doctor
first of all, you have to check the pH, content of iron and yellow metals (Copper....) of the condensate ; do you apply any volatile treatment on the boiler? what kind of...? what kind of metallurgy do you have on the pimping system return ? you could apply something not suitable ....for example ammonium is corrosive against the yellow metals ....Another problems could be the length of the piping system....Content of Oxygen ....
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Confirm no yellow metal. AVT (O) applied currently with amine base for pH controller. Carbon steel at the return condensate t demin plant. Length of piping is 100m and observed significant pH dropped in the turbine condensate that maintain at 8.5 to 8.8 against the BFW is 9.2 to 9.4. Confirm no oxygen ingress based on DO reading at the bottom deaerator and able to maintain vacuum pressure at the surface condenser.
Published by Harizan Hawari, Staff Engineer at Petronas Chemicals Group