Calculating softening capacity
Calculating softening capacity
(OP)
Hi folks!
Has anyone got an equation for calculating the softening capacity of a resin?
I have the capacity of the resin itself (43.7 kgr/cubic foot in Na+ form), the volume/weight of resin, and I'm trying to calculate the amount of water at a specific hardness (as CaCO3) that each softener can soften before requiring a regeneration. (it's eq/l is 2.0, if that helps) Can anybody help?
TIA
Michael
Has anyone got an equation for calculating the softening capacity of a resin?
I have the capacity of the resin itself (43.7 kgr/cubic foot in Na+ form), the volume/weight of resin, and I'm trying to calculate the amount of water at a specific hardness (as CaCO3) that each softener can soften before requiring a regeneration. (it's eq/l is 2.0, if that helps) Can anybody help?
TIA
Michael





RE: Calculating softening capacity
You will need to know a bit more information than you have given in your question. Specifically, the amount of salt applied per cubic foot of resin, whether it is a co-current or countercurrent regeneration system and the service run length.
Good luck.
RE: Calculating softening capacity
I'll keep trying in the meantime. The product we are using is one of the DOW strong acid resins.
Thanks,
Michael
RE: Calculating softening capacity
Then go to the "PRODUCTS" button in the black box across the bottom of the page and click on it.
Then go to the "- Purolite Strong and Weak Acid Cation Exchangers" and click on it.
Then click on "C100". That will give you the Technical Data sheet that includes how to calculate capacity. That is the same type of resin as the Dow resin.
It is important to have the water analysis and to select the salt dose you want to use. You can use the charts and graphs there to determine an appropriate salt dose.
Gary Schreiber, CWS VI
The Purolite Co.
RE: Calculating softening capacity
Thanks for yuor help, folks!
Michael