GE P&W Mobile Water Treatment Systems - Standard Resin Regeneration Services - Manual (Page 2)

Page 2 Fact Sheet
anion regeneration sequence will include a bed-
warm step.
Regenerant Displacement
Minimum regenerant displacement time will be 20
minutes, but will be continued until the calculated
time to displace all of the regenerant from the inlet
distributor to the outlet distributor.
Final Rinse
All final rinses will be done with deionized water to a
50 Mmho endpoint for individual resins (Note 1) and
1 Mmho endpoint for mixed bed resins (Note 2).
However, in all cases, minimum rinse volumes will
be 30 gallons/FT
3 .
Degree of Regeneration
Due to the varying condition of used resins, it is not
reasonable to expect ultra high conversions to the
regenerated forms as is possible with new resin due
to the accumulation of foulants and normal chemi-
cal resin degradation of older resins. However, GE
does estimate that these procedures will yield a
minimum of 80% conversion to the hydrogen form
cation and 65% conversion to the hydroxide form
anion based on the available salt splitting capacity
for the resin. As the norm, most resins will analyze
90% conversion of the cation resin and 70% con-
version of the anion resin to the regenerated forms.
Notes
1. Assumes strong base resins are not severely
fouled with organics and weak base resins do
not contain excess carboxylic acid sites. In such
cases, final rinse conductivity will be determined
but minimum rinse will be 75 gal./FT
3 .
2. Mixed bed regenerations include additional
steps of remixing resins after regeneration and
shipping resins back to the job site in a mixed
condition. Final rinse to 1 Mmho is from mixed resin.