Siemens IONPURE VNX50HH-2, Руководство по эксплуатации и техническому обслуживанию

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IONPURE
®
VNX50HH-2 CEDI Modules
Page 11 IP-MAN-VNX50HH2
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Feed Water Requirements – RO Permeate
Feed water for the VNX module must always meet the specifications outlined in Table 2-3.
In most cases, pre-treating VNX module feed water with reverse osmosis (RO) will bring it
within these specifications. Depending on the conditions, however, some sites may
require additional pretreatment. To determine if additional pretreatment is required,
compare the VNX feed water (RO Permeate) on site with the feed water requirements
listed below.
Table 2-3:
Feed Water Requirements for the VNX50HH Modules
Module Model VNX50HH-2
Feed water source RO permeate
Feed water conductivity equivalent
including CO
2
*
< 40 µS/cm
Silica (SiO
2
) < 1 ppm
Iron, Manganese, Sulfide < 0.01 ppm
Total chlorine < 0.02 ppm as Cl
2
Total Hardness
≤ 2.0 ppm as CaCO
3
Dissolved organics (TOC) < 0.5 ppm
Operating pH range 4 – 11
Operating Temperature 40 - 113 °F (5 – 45 °C)
Inlet pressure <100 psi ( 7 bar)
Note: Recycling the VNX reject to the RO feed will cause the CO
2
load on the VNX to
increase, and may have an impact on the VNX product water quality. Please refer to
Ionpure.com for additional reject stream system design guidance including the following
paper from Jonathan Wood and Joe Gifford (“
Process and System Design for Reliable
Operation of RO/CEDI Systems”
)
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Drain Requirements
Place the VNX module near a drain that can accommodate at least 100% of the total feed
flow.
2.5. Flow Rates and pressure drops
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See Appendix A