Circulating water make-up water issue
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The hardness of the make-up water and the total alkalinity in our unit’s circulating water are high; is there anyone experienced who can help solve this problem? I have two ideas: softening the hardness by using quicklime, but there’s no place to dispose of the slaked lime that is produced, so figuring out how to deal with it is a problem. To reduce alkalinity, acid can be added; is concentrated sulfuric acid suitable?
1. It can be treated with slaked lime, stored in sealed tanks to prevent environmental pollution, and the resulting sludge is compressed into mud cakes using a filter press. Lime treatment can remove both hardness and alkalinity simultaneously.
2. It is also possible to use a weakly alkaline bed to remove hardness, and then use a carbon remover to eliminate alkalinity; however, this method requires a large amount of acid and results in higher operating costs
3. The H-Na parallel softening process can also be employed.
In our case, we use concentrated sulfuric acid to control the pH level
It is necessary to check the values of alkalinity and hardness; if the sum of alkalinity and hardness is below 1500, no adjustment is required, and a corrosion and scale inhibition agent resistant to high hardness can be used directly. Feel free to contact me if you need anything.
We use RO-treated water for our circulating water, and sulfuric acid is used to adjust the pH value
Send over the water quality report. I’ve always believed that water treatment for each company has its own particularities; it’s like treating people – the right solution must be chosen based on the specific situation :)
To enable circulation using pure water directly, a pipeline device called an electrostatic high-pressure water treatment unit can be added; you can inquire about which companies offer such devices by searching on Baidu.
1. Add quicklime 2. Install soft water equipment