Salt slippage
Salt slippage
(OP)
We have a water softening system here in our plant that consists of 3 tanks. They are sold by Braswell. This system is about a year old and has run well until about 3 months ago when each of the tanks started to slip sodium. It has been cycling up in the boilers. The amount of slippage in each tank is the same, the public water supply is in the 7 ppm range and the units are giving us 15-20 ppm. Each one tests this level. We changed salt supplier from the "yellow bags" to the "white bags", I'm not sure if this has anything to do with it, but it's the only thing different we've found that was done. Could this be the cause of it? We have extended the rinse times, but to no avail. What can you chem guys tell me about what is happening?





RE: Salt slippage
What is important for your boiler is that the hardness is zero, not that the concentration of sodium is higher.
Here is a typical water analysis before and after water softener treatment:
Softener Influent..................Softener Effluent
50 mg/l Calcium as CaCO3...........1 mg/l Calcium as CaCO3
10 mg/l Magnesium as CaCO3.........1 mg/l Magnesium as CaCO3
20 mg/l Sodium as CaCO3............78 mg/l Sodium as CaCO3
As you can see, the sodium will increase after water softening treatment.
Perhaps you could state the water analysis?
RE: Salt slippage
RE: Salt slippage
Gary Schreiber, CWS VI
The Purolite Co.
RE: Salt slippage
RE: Salt slippage
just a wild thought;Is wash water OK w.r.t.Chlorides level?
Best Regards
Qalander(Chem)
RE: Salt slippage
RE: Salt slippage
Is there any possibility of softener resins channelisation in such a way that active surface area availability is hampered?
Have you checked /Established no loss of any resins?
The problem you refferred is apparently on all the three sets!If I am not mistaken or
At one particular train?
Best Regards
Qalander(Chem)
RE: Salt slippage
You have stated that you have rinsed down the water softener so that this is not possible.
You may have some brine trapped in the regeneration distributor after regeneration has occurred.
However, it is more likely that you have a leaking valve that is allowing brine to enter.
RE: Salt slippage
RE: Salt slippage
RE: Salt slippage
Is it possible that you have some anion resin mixed into the water softening resin? Anion resin is sometimes used to remove nitrates. The anion resin is regenerated with sodium chloride and will exchange chloride for nitrate.
Is it possible that used resin instead of new was used?
Have you measured the chloride concentration in the raw water and in the effluent at the same time? Is the water analysis for the raw water current? The chloride concentration the raw water is not constant and will change. Sometimes a City will change from Well #1 to Well #2 which results in a change in the chlorided concnetration. Sometimes there is a seasonal change.
It would be helpful if you would post some pertinent information such as:
Complete water analysis
Water source
Equipment of Age
Equipment New/Used
Resin New/Used
Capacity of system
Automatic or Manual
Boiler Pressure
Industry
Etc.
Otherwise you should expect call-and-response answers.
RE: Salt slippage
RE: Salt slippage
RE: Salt slippage
RE: Salt slippage
It is useful to check internal distribution system while reloading and
Do ensure system in-place for avoiding the major disturbance beyond plans in resin's bulk formation and contacting surface inside vessels (containment) during/after any of the regeneration steps.
Best Regards
Qalander(Chem)