Issues with the pH value and phosphate levels in drum water

The pH value in the low-pressure drum is around 9, and the phosphate ion concentration is very low (less than 5 mg/l). There could be several reasons for this: 1. **Insufficient or uneven addition of water treatment chemicals**: If phosphate-based chemicals are used for boiler water treatment, an insufficient amount or uneven distribution of these chemicals can result in a low phosphate concentration. 2. **Consumption or deposition of phosphate**: During boiler operation, if a large amount of scale forms, phosphate may be consumed or combined with other ions such as calcium and magnesium and deposited on the tube walls or boiler interior, thereby reducing the phosphate concentration in the water. 3. **System leakage or dilution**: If there are leaks in the system, or if phosphates are not added properly to the make-up water, this can also result in an insufficient amount of phosphates in the system. 4. **Analysis method issues**: Sometimes, the choice of laboratory analysis methods or operational errors can also affect the detection results of phosphates; it is necessary to use the correct methods and calibrated equipment. It is recommended to check the chemical dosing in the water treatment system to ensure it is uniform and sufficient. At the same time, check whether there are any leaks or other operational issues in the system, and if necessary, reevaluate the water quality analysis methods used. .