Regarding the issue of positive phosphorus in circulating water parameters
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Before the plant was shut down, the circulating water system was operating normally and the level of positive phosphorus was very low; however, after the plant was shut down, the level of positive phosphorus in the circulating water rose to around 12. Why? Please ask an expert for a solution, thank you
If an organic phosphine is used, it will decompose into orthophosphorus. What was the total phosphorus level before parking?
These questions shouldn’t be asked here; they should be directed to your water treatment agent suppliers, who should be able to provide technical support
Could it be that cleaning and pre-coating were carried out after driving, and incomplete replacement after pre-coating is the cause?
We carried out cleaning and pre-coating last June, and the level of orthophosphorus was below 1 after that. After this shutdown, the level of orthophosphorus started to rise, reaching as high as 13, while the level of organic phosphorus remained between 3 and 4; all other indicators are normal. We would appreciate some advice from those with more experience. Also, what are the negative effects of high orthophosphorus levels after the system is shut down? The heat exchanger is in a stopped state.
The level of orthophosphorus is high; the main concern is that it can cause calcium phosphate scaling at high temperatures, but this isn’t an issue at low temperatures. Since the system is shut down, it may lead to the growth of bacteria and algae. Changing the water while the system is running shouldn’t pose any problems. Also, check whether there are any issues with the analysis results
The source of orthophosphorus is either produced by the hydrolysis of organic phosphines, or it results from phosphate precipitates present in the original system; after shutdown, changes in the water’s pH or other parameters cause phosphorus to precipitate out.