pH value of condensate water in natural gas hydrogen production plants
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Yesterday, a teacher raised doubts regarding the pH value of the condensate produced in the water separation tank of our unit’s natural gas hydrogen production facility; after steam stripping, this pH value is kept around 7-8. Then I looked it up online, and the figures provided were mostly between 6 and 7 for those that hadn’t been subjected to stripping treatment; after stripping treatment, the value could reach 7 to 9. I would like to ask all my friends here to share the metrics of their respective organizations so that I can make a decision
1. Unstripped/insufficiently stripped pH: 5.5 to 7.0, on the acidic side, which can easily corrode pipes and reflux pumps. 2. Normal stripping (under design conditions): pH range of 7.0 to 8.5. The vast majority of plants fall within this range; a pH of 7–8 is the typical value for you. 3. Excessive stripping / alkali carried by steam / alkalization treatment: A pH of 8.5 to 9.5 is also common, but it isn’t necessary to have such a high value; higher pH levels result in waste of steam and may lead to salt formation. 4. Values above 9.5 generally indicate an abnormality: ammonia/alkali introduced into the boiler feed water, catalyst dust, contaminants, or issues with the quality of the stripping steam.