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Sodium Sulphate deposits in heat exchanger made out of Nickel Plate





July 22, 2010

I work in the Chemical Company that manufactures bleach.
Over couple of months there has been sulphate deposits in the heat exchanger made out of nickel plates. The use of the heat exchanger was to get the caustic to cool down to low temp of 80 F. Every two weeks we are having to clean up the exchangers because of the deposits of sulphate. Is there any way to trap sulphate before it gets to heat exchanger ?

Ram Prasad
chemist - Texas



July 27, 2010

Calcium sulfate fouling of heat exchangers is common on heating coils, but I haven't heard of it on a cooling coil before.

Try to identify the cation in the sulfate scale. Maybe you can eliminate the scale by eliminating it.

Lyle Kirman
consultant - Cleveland Heights, Ohio


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