COST REDUCTION THROUGH CREATIVE CHEMICAL TECHNOLOGY

Technical Data Sheet

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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