Analysis and Operation Scheme for Corrosion Mitigation of Closed Cooling Water System
This paper introduces closed cooling water system＇s structure and function of the 300 MW units in Wujing power plant. To solve this corrosion problems, according to GB/T12145-2008 on closed water requirements, through technical analysis and depth search and laboratory hanging pieces, the adjustment of the operation test run. Developed to increase the pH value and adding corrosion inhibitor operation scheme that effectively slows the closed cooling water system equipment for metal corrosion. December 2010 closed water test results：25 ~C, the copper content of 6. 49μg/L, iron content of 8. 16 μg/L, pH value is 8. 2, the conductivity of 6.7 μS/cm, dissolved oxygen of 5.67 mg/L, that shows slowing down the corrosion effect is obvious, to obtain better economic benefits at the same time, improve the operation of the unit safety.
Closed cooling water systemCorrosion potentialImproved pHCorrosion inhibitor
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