Evaluate the Resin volume in a Mix Bed filter

Question

Hi All,
Is there any method to evaluate the actual resin quantity (Cationic and Anionic) by calculations in a mix bed filter?

peter meyers · Answer

Hi, your question was a bit open ended and I wonder if some of the other answers may have missed the mark. 
Yes, you can start with the water analysis and calculate loading (the equivalent concentration of cations and anions in the feed that need to be removed).  You also need to calculate the operating capacity of each resin used in the mixed bed (which is a fraction of the resins total capacity depending on degree of regeneration and the mix of ions in the feed.  Once you have done this, the volume calculation for the resin is straightforward.
Resin volume equals throughput times resin capacity divided by loading (or if you prefer, resin volume times resin capacity divided by loading equals throughput).
You can request a resin rating from various resin companies, some have on line software that you can use or there are older charts and such that provide capacity information in hard copy formats.

Mike (Jon M.) Adams · Answer

The answers below are technically correct, and , in fact, most resin manufacturers now offer software for this function, but there is one additional consideration. Traditionally to somewhat standardize the mechanical design of the vessel and laterals, the standard ratio of cation to anion exchange resin is generally 1:1 or 2:3, depending on the breakthrough point you want. In the 1:1 you should break on silica, whereas the latter will generally break on conductivity.

HOFMANN Dieter · Answer

Go to software as supplied by Lanxess for free. Therefore you can calculate by Water analysis. Best regards Dieter

Ahmed Soorma · Answer

https://www.kansaswatertech.com/includes/technical/Softener_Calculations_and_Survey_110410.xls

Ahmed Soorma · Answer

http://dardel.info/IX/processes/design_principles.html

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