The iron ion level in the circulating water is too high; sodium hydroxide is continuously added to carry out hydrogen oxidation, and more wastewater is discharged.
Thread Content
Is it that effective? ? ? ?
It is necessary to identify the problem before making targeted adjustments. Simply adding liquid alkali may not necessarily solve the problem. What level the excess iron ions reach is also a factor that needs to be considered. Adding alkali directly to the circulating water is not appropriate; under alkaline conditions, iron turns into iron oxide precipitates and suspensions that tend to adhere to the pipe walls, which hinders the resolution of the problem. So, what system needs to be determined? What causes excessive iron levels? Only then can it be solved. I hope this helps you.
Excess iron ions: 1. Is there corrosion in the pipes? 2. Is the iron ion content in the chemicals added excessive? 3. Is the corrosion inhibitor being used properly? 4. Increase the amount of waste discharged by doing so at the main return pipe of the process
This one definitely won’t work; a magnetic filter should be added
The system is suffering from corrosion; it is necessary to first identify the cause of the corrosion by checking factors such as pH value, hardness, and alkalinity
This post was last edited by rrstar on 2016-6-28 at 11:03. It is not appropriate to use sodium hydroxide to adjust the alkalinity when iron ion levels are high! This leads to an increase in the turbidity of the circulating water, as hydroxide ions combine with iron to form ferric hydroxide flocculent colloids, which cause sludge deposits to form in the water. It is recommended to use sodium carbonate or sodium bicarbonate instead of sodium hydroxide. If the high iron level in the circulating water is not due to water replenishment, it indicates a problem with the corrosion control in this system; the existing corrosion control measures can be adjusted while carrying out appropriate water replacement
What is the pH level at which corrosion occurs? Is there a lot of sludge in the system? Is it effective to add sodium hydroxide for waste removal?