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Seeking help: What are the common causes of excessive bubbles in a cooling water system that uses RO water?

2015-12-11View Original

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Seeking help: What are the common causes of excessive bubbles in a cooling water system that uses RO water? Currently, severe cavitation is occurring in the pump impeller of this system.
Reply #22015-12-11
This post was last edited by qugd on 2015-12-11 at 17:00. It is estimated that the high removal rate of cations and the low removal rate of anions in the water are the reasons for the acidic nature of the water quality. The carbonic acid dissolved in water turns into carbon dioxide and escapes. Additionally, the pressure at the suction inlet of the water pump is too low, resulting in a slight negative pressure that creates some bubbles. Appropriately increase the pressure at the water pump inlet.
Reply #32015-12-12
Hello, currently the pH value of the circulating water is 8.22, the total alkalinity is 70, the chloride concentration is 111, the total phosphorus level is 2.46, and the total iron content is 1.06. Some people here suspect that there may be an oil leak, which is causing a saponification reaction in the water. Could this happen?
Reply #42015-12-12
It is probably caused by the added slow-release scale inhibitor!
Reply #52015-12-15
The COD of the circulating water can be measured to determine whether there is a leakage of organic substances. Furthermore, depending on the water quality, reverse osmosis water should be included as part of the make-up water. Rehydration also includes other water sources. The COD of this water source can be tested.

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