problem in chocolate factory
problem in chocolate factory
(OP)
I have a problem with the scaling of pipes (carbonate,chalk.lme formation). The water tests show that the ph is ok, german hardness is ok . Also theres a blackening of stainless steel r 316 L and corrosion of the injection moulding press which is made of a cu-al-ni-fe alloy. I use sodium hydroxide as the cleaning agent and a boost of hydrogen peroxide to clean the pipes and the stainles steel tanks. My suspects are the resin udes in the softening unit bayer lewatit s 1467 and the composition of the naoh / h2o2 mixture , maybe i need the correct mixture , i want to know the ideal mixture of naoh and h202 for cleaning 5000 litre tanks and the correct resin for the softening unit.





RE: problem in chocolate factory
Mark Hutton
RE: problem in chocolate factory
RE: problem in chocolate factory
How much peroxide are you using? What is the concentration at the inlet and discharge?
Do you run the hydroxide and peroxide together, or one after the other?
Does the water start out at 85C, are there areas that are cooler than that?
You need to have some analysis done to find out what the deposits are. The black may be magnetite. If it is, and it is staying stuck to the tubes then leave it alone.
The only way to clean these (if they are what I suspect) is with nitric acid.
First you need to determine if the product is being effected.
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RE: problem in chocolate factory
7-10 ft/sec is a good rule of thumb for CIP velocity, otherwise as you say, the flow is not turbulent and there is not much "scrubbing" effect.