Scale inhibitor dosage
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How is the dosage of the scale inhibitor determined?
Is it a scale inhibitor for circulating water or for reverse osmosis? Generally, the dosage is determined by controlling the LSI in water (which mainly reflects the tendency to form calcium carbonate scale) ； As for some other scaling factors, special components are needed to prevent scaling.
Generally, scale inhibitors are added based on the levels of total phosphorus and positive phosphorus in the water. ~~~ There are two different conditions for addition: cold and hot
It’s generally like this when makeup water is added.
The amount of scale inhibitor added is determined based on the water quality; for RO systems, it is generally 3-5 g per ton of water.
Generally, compound products are added at a rate of 100 ppm; the amount to be added is determined based on the detectable concentration of the active ingredient as specified by the manufacturer. First, add the required amount to reach the target concentration at once, and thereafter add the substance according to the volume of wastewater discharged. The amount to be added is calculated by multiplying the concentration by the water volume – make sure to convert the units properly
The daily dosage of circulating water is determined based on the amount of make-up water used; it is usually specified in terms of ppm, and this value is provided by the manufacturers of the chemicals involved. This is because they must conduct tests to determine the optimal formulation and dosage. Additionally, once the formulation is fixed, many of the components are also determined. As a result, manufacturers of organic phosphorus-based chemicals often use total phosphorus or levels of organic phosphorus such as 2-4 as control parameters. Some manufacturers also include tracers in their products, using the amount of these tracers as a control indicator.
It depends on whether it is circulating water or RO water
When adding scale inhibitors to the circulating water, the dosage should be adjusted according to the formula provided by the manufacturer – higher when necessary and lower otherwise; otherwise, the total phosphorus level will be high. Does adding more chemical actually reduce it?