GE P&W HERO High Efficiency Reverse Osmosis - Manual (Page 2)

MOD-2 – HERO System
Either a single-pass or a tw
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.
MOD-4 – Polishing Loop / Cold UPW
Product water from Module 3 (above)
is collected in a blanketed storage
tank. A TOC reducing UV and cooling
heat exchanger serve as a precursor
to polishing mixed beds and a final
cold ultrafiltration (UF) step.
MOD-5 – Hot UPW
A side stream of polished (pre-UF) wa-
ter from Module 4 is diverted as feed
to this module. Product Water is
brought to temperature before going
through a hot UF step. The UF perme-
ate then goes to the plant for con-
sumption
MOD-7 – Support Equipment
Miscellaneous system support opera-
tions include necessary regeneration
storage tanks and transfer pumps.
o-pass RO
system operating at 90%+ overall
recovery. The RO system is preceded
by cartridge filtration and a
degasification step. Optional CIP
System for RO cleaning.
MOD-3 – Primary UPW
A storage tank with a nitrogen blanket
is provided for RO permeate collection.
From the storage tank, product is
transferred through TOC UV units to
either electrodeionization (EDI) stacks
or primary mixed beds. Finally, gas-
transfer membranes are used to
remove CO2 and further enhance
product water quality.
MOD-6 – Rinse Reclaim / Recycle
Last rinse water from the cold and hot
UPW manufacturing operations are
diverted to this module for treatment
and reuse. The heart of this process is
a patented reverse osmosis step, with
overall recovery greater than 90%.
MOD-1 – Pretreatment
Unit operations selected based on
feed water characteristics such as
hardness and alkalinity. In general,
this module can consist of blend water
tank and pumps, prefiltration, heat
exchanger, softener, and weak or
strong acid cation columns.
Figure 2: UPW Design Modules