The pH of the water purified by acidic water vapor stripping is high
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Please, experts! The pH of the purified water in my system has recently shown abnormal values: the sulfide level is 0.32, and the nitrogen oxide level is 0.25, but the pH is above 10. We have analyzed the acidic water and found that its pH is 8.83. I would like to ask everyone why this is happening. I suspect it might be related to the recirculation process, but the recirculation rate is 400 KG/H, the feed rate is 9 T/H, the top temperature is 120 degrees, and the bottom temperature is 127 degrees. I really can’t figure it out>
It is possible that alkaline substances in the purification system neutralized the acidic substances, resulting in a higher pH value. It is also possible that there is an error in the measuring equipment or that it is contaminated. Furthermore, improper reflux ratio and temperature control can also affect the pH value. It is recommended to inspect the equipment, carefully analyze the composition of the raw materials and the manufacturing process, in order to identify the root cause of the problem. .
Thank you for the reply! Removing the cooler didn’t cause any change; in the end, we had to mix the raw water with fresh water to fix it