Vol.7, No2, 2007, pp. 83-88
UDC 620.193.46: 546.212

Abstract

The paper offers some insight into the significance of water quality control in thermal-power plants. It is essential to produce water and steam of high purity and also to monitor the presence and flow of all impurity types. The presence of corrosive components in water or steam has negative effects even at low mass level. A minimization of corrosive ion concentration in boiler feed water and in the steam reduces the possible corrosion damage of system components. The purification of water can be accomplished by classical treatment and by membrane separation technology. Measurement of impurities throughout the water–steam cycle can provide valuable information regarding the source of contamination, and probable rates of corrosion. In order to maintain high reliability level and to realize the expected lifetime of thermal-plants, the high quality of water must be assured.

Keywords: ultra-clean industrial water, corrosion, softened water, water chemical treatment, demineralization