IONPURE
®
LX CEDI Modules
Page 13 IP-MAN-LX-1220-EN.pdf
within these specifications. Depending on the conditions, however, some sites may
require additional pretreatment. To determine if additional pretreatment is required,
compare the LX feed water on site with the feed water requirements listed below.
NOTE: Recycling the LX reject to the RO feed will cause the CO
2
load on the LX to
increase, and may have an impact on the LX product water quality. Please refer to
Ionpure.com for additional reject stream system design guidance including the following
paper: “Process and System Design for Reliable Operation of RO/CEDI Systems”,
Jonathan Wood and Joe Gifford, International Water Conference, 2004 (Paper 47).
Table 2-3. CEDI Feed Water (RO Permeate) Requirements - Also See Appendix A.2
Parameter EU, X Z HI
FCE* (µS/cm) ≤ 40 µS/cm ≤ 40 µS/cm ≤ 40 µS/cm
Total hardness (as
CaCO
3
)
≤ 1.0 ppm ≤ 1.0 ppm ≤ 1.0 ppm
Total chlorine (as Cl
2
) ≤ 0.02 ppm ≤ 0.05 ppm ≤ 0.02 ppm
Silica (ppm as SiO
2
) ≤ 1.0 ppm ≤ 1.0 ppm ≤ 1.0 ppm
Iron, manganese, sulfide ≤ 0.01 ppm ≤ 0.01 ppm ≤ 0.01 ppm
TOC (ppm as C) ≤ 0.5 ppm ≤ 0.5 ppm ≤ 0.5 ppm
Operating pH range 4 – 11 4 – 11 4 – 11
Feed water temperature
41 - 113 °F
(5 – 45 °C)
41 - 113 °F
(5 – 45 °C)
41 - 140 °F
(5 – 60 °C)
Inlet pressure
≤ 100 psig
(6.9 bar)
≤ 100 psig
(6.9 bar)
≤ 100 psig
(6.9 bar)
*FCE stands for feed (water) conductivity equivalent)
FCE = measured µS/cm + (ppm CO
2
)(2.79) + (ppm SiO
2
)(2.04)
2.4.6. Drain Requirements
Place the LX module near a drain that can accommodate 100% of the total feed flow.
2.5. Flow Rates and Pressure Drops
See Appendix A, Table A.2.
To Next Page
Loading...
Need help?
General
