Ion Exchange Equipment

Ion-exchange resins are installed in tanks that have support plates and distribution piping. This piping distributes fluids across a packed bed of resin that rests on a support plate. A collector is installed in the support plate. All components should be constructed of corrosion-resistant materials. Figure 7.36.11 shows a cross section of a typical unit.

Many detail differences exist among manufactured equipment but they all have common flow streams that require control. Figure 7.36.12 details the operation of an ion-exchange plant. The end point can be determined with resistivity measurement and chemical metals analysis such as calcium, magnesium, and copper. Plants sometimes op erate with two beds in series with the second bed operating as a polisher.

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