Changing IX Resin Cut Acid/Caustic Needs

摘要

After changing thernion exchange (IX)rnresin and regenera-rntion procedure atrnthe Puerto RicornElectric PowerrnAuthority (PREPA)rnAguirre thermoelectric plant, operationsrnand chemistry management groups re-rnported a reduction in acid, caustic and man hours for boiler feedwater deionization/ demineralization (DI). Man hours for DI wastewater treatment were also cut.rnCosts for acid and caustic had gone up because of increasing hardness in the deep well boiler feedwater source, but no new capital investment was available to address the problem.