COST REDUCTION THROUGH CREATIVE CHEMICAL TECHNOLOGY
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Technical Data Sheet
Sodium
Zeolite Softening Process
Introduction
Sodium-Zeolite (NaZ)
softening is an ion exchange-based process designed to remove hardness (calcium
and magnesium) from raw water. NaZ
softening will remove other soluble
cation species such as iron and copper and will act as a filter for small
suspended solids. Strong Acid
Cation (SAC) resin is used to provide ion exchange removal of the hardness (Ca
& Mg). The NaZ softening
process is used to pretreat boiler and/or cooling makeup. The NaZ softener may be used in combination with other
pretreatment processes, such as dealkalization and reverse osmosis, to provide
further improved water quality. The
process modified somewhat can be used to treat condensate, a process known as
condensate polishing. The resin is
regenerated with sodium chloride (NaCl). Figure
1 illustrates the ion exchange process as it occurs in the system.
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