Issues regarding acid regeneration and alkali regeneration concentrations in resin towers
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This post was last edited by sunjl1981 on 2013-1-6 at 21:05. The acidity level in our plant is 31%, while the alkalinity level is 32%. The flow rate for acid regeneration is 3000 L/H, with 11.6 M3 of pure water being used per cycle, and the duration of this process is 45 minutes. The flow rate for alkali regeneration is 1300 L/H, with 14 M3 of pure water used per cycle, and the duration is 90 minutes. The acid concentration after mixing, according to my calculations, is: 31% × 3/14.6 = 6.3%. The alkalinity concentration after mixing, as per my calculations, is: 32% × 1.3/15.3 = 2.7%. I read in some documents that the desired acid concentration after mixing is 5%, and the desired alkalinity concentration is 4%. I would appreciate it if everyone could discuss which concentration ratios are better. # hcbbs
It is better to keep the acid concentration between 6% and 7%, and the alkali concentration between 4% and 5%.
Our plant has low alkali concentration and long regeneration time; I’m not sure if this is good for H-R to RNA-R
A low alkali concentration can lead to incomplete resin regeneration, resulting in unstable parameters in the brine effluent. I wonder what model of resin your company uses?
Bayer from Germany; I can’t remember the model number. Could you help me check if there’s anything wrong with my calculation of the proportions? Hehe
A low alkali concentration can easily lead to incomplete resin regeneration and unstable parameters in the brine effluent. I wonder what model of resin your company uses?
How often is it necessary to regenerate the resin in double quantity after three years of use?
Double regeneration is related to the performance of the system after regeneration; a rapid increase in indicators such as calcium and magnesium indicates poor adsorption efficiency, which necessitates double regeneration.
1# xuefen489 Our acidity is 7%, and alkalinity is 4%.
It depends on the process used; with Asahi Glass’s process, 4% acid and 5% alkali are used, resulting in good regeneration efficiency, but the regeneration steps are complicated； The Asahi Kasei process uses 7% acid and 4% alkali, with a simple regeneration step.
In the first phase of our workshop, it is advisable to keep the acid concentration between 6% and 7%, and the alkali concentration between 4% and 5%. Our acid level in phase two is 7%, and the alkali level is 4%. The model of the resin tower is not very clear