Concentration ratio of circulating water
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Concentration ratio of recycled water: The concentration ratio of recycled water depends primarily on the sum of total alkalinity and total hardness, which should not exceed 1100 mg/m3. If this value is higher, acid needs to be added. But is it possible to adjust the concentration ratio so that the sum of total alkalinity and total hardness is close to 1100 mg/m3? Are there any chemicals that can prevent corrosion or scaling? Please let the experts discuss it.
A good composite formula can definitely achieve this. I worked with a system where the conductivity of the make-up water was 1700, the alkalinity was 400 mg/L, and the calcium ion level was 140 mg/L (all expressed in terms of calcium carbonate). After concentrating the water three times and operating continuously for a year, there were no issues related to heat exchange, and the corrosion level, as indicated by the monitoring coupons, was well below the requirements specified in the design standards