The acid concentration of the resin tower during regeneration
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This post was last edited by sunjl1981 on 2013-1-6 23:35 Our resin tower has been regenerated using 4% hydrochloric acid solution since its startup. Recently, we have used Lanxiao's resin. At the beginning we still used 4% hydrochloric acid for regeneration, but the hardness was always very high. Later, I consulted the Lanxiao manufacturer and they said that the best concentration of hydrochloric acid during regeneration is 6-8%! However, our resin tower has two towers, only one of which uses their resin, and the two towers are controlled by a shared PLC program! ! Furthermore, is the 6-8% they said too high? Excessive acid and alkali concentration will cause the expansion and contraction coefficient of the resin to increase and cause resin damage. I would like to ask what is the concentration of hydrochloric acid when regenerating your resin? I hope you will not hesitate to give me some advice! # , , &
1. Our acid concentration is 7%； 2. The acid concentration should not be too high. When it is higher than 10%, it will have an impact on the regeneration process. ； 3. When the acid concentration is high, the volume of the resin changes greatly, which can easily cause high bed resistance and uneven distribution.
May I ask which resin your company uses?
It is recommended to adjust the acid concentration to 5%-5.5%. Although theoretically there will be some damage to the resin, it is actually very small and can improve the regeneration effect!
BAYER TP208
The recommended acid concentration is 7%, according to the parameters provided by the manufacturer. Personally, I feel that there is little difference between 4% and 7% acid concentration on the resin.
Various brands of resin have different requirements for the acid-base concentration during regeneration. It is recommended to consult the resin supplier before making a decision.