Cochrane FILTEREX Water Softeners
The COCHRANE® by newterra’s FILTEREX water softener is a co-current style ion exchange softener. The ion exchange media in the vessels is a strong acid cation exchange resin that is in the sodium form. Resin in this form will exchange hardness causing constituents in the water to be exchanged on to the resin while less strongly held sodium ions are displaced from the resin. Typically used for moderate to low temperature applications.
The feed water is distributed evenly through the top of the vessel and allowed to flow through the resin within the vessel before being collected by a lateral collection system at the bottom of the vessel. Eventually the exchange capacity of the resin in the vessel is exhausted. This is determined by a treated volume setpoint.
If the resin becomes loaded with suspended solids, due to unanticipated suspended solids in the feed water the units are backwashed to remove these solids. During backwash feed water is directed from the bottom of the bed out through the top of the unit. This fluidizes the resin allowing suspended solids to be carried away to waste.
The resin is regenerated with a concentrated salt solution. When regeneration begins saturated brine is diluted with feed water and introduced through the top distributor. Spent regenerant is collected from the bottom of the bed and discharged to waste. After regeneration the resin is rinsed prior to starting a new cycle.
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