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The Dissolution Characteristics of Air-Cooled Unit Condensate Polishing Filter Materials in High Temperature Water

Condensate polishing filter materials are water-insoluble organic polymers. But in air-cooled condenser, high temperature condensing water in summer which approaching and exceed 60°C, which may result in filter materials degradation and release impurities. This paper discusses dissolution characteristics of four kinds of polishing filter materials in high temperature water. The specific conductance (SC), pH, UV absorption at 254nm (A254), total organic carbon (TOC) and the concentrations of ions in their extraction liquid ware measured after heat test as composite indicators. In addition, the trends of A254 and SC variation with heating time were measured. A comprehensive indicator system of filter dissolution can accurately determine the type and quantity of leachables which affect the water and vapor quality.