Reasons for the excessive hardness of steam condensate water

2017-02-16View Original

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Our facility’s refrigeration units generate a large amount of steam condensate, which the company plans to recycle. However, the results of several tests showed that the hardness was above the limit. pH value, chloride ions, hardness, conductivity: 5.4, 6.09, 4.1, 7.6, 7.5, 4, 13.2. No leakage of circulating water was detected; after extensive research online, it was concluded that the condensed water contained high levels of copper ions as a result of steam passing through the heat exchanger, which affected the test results. I wonder if there are any good methods to eliminate the impact of copper ions on the analysis results. The EDTA titration method was used; during the testing, either very high hardness values were obtained, or it was not possible to reach the endpoint of the titration.

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Reasons for the excessive hardness of steam condensate water

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