The pH level in the wet air-cooled water tank remains substandard for an extended period
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The unit is equipped with several wet air coolers, and the water in the water tanks is demineralized water. I tried draining the water in the tank completely to clean it, and then filling it back up with water. Analyses were conducted on the pH and microorganisms in the water. The microbial levels are generally within normal ranges, while the pH level in the water tank starts to become suboptimal after a few days of operation; it usually drops to around 6.5 and then stops falling any further. It is understood that the upstream unit injects ammonia into the water to adjust the pH of the deionized water. Has anyone encountered this issue, or do you know what causes the pH of water to drop? Control test: A bucket of open-top mineral water was placed next to the wet air cooler for one week, with no change in pH.
There are two possibilities; one is external materials； Second, whether the material is related to temperature changes. For reference.