Abstract: The open closedloop cycle system is adopted for 300MW unit circulating cooling water in Jiangsu Huadian Yangzhou Power Generation Corporation Limited.The operation mode and control parameters of its circulating cooling water treatment system are of important significance to energysaving and emission reduction of the power plant. Based on the experimental research of scaling and corrosion inhibition technology in circulating water treatment process of the power plant, the optimal control conditions suitable to the circulating water treatment process of the power plant were found, the security target of operation without scaling and corrosion was realized, the operation consumption was reduced, and the drained water quality of circulating water system was corresponded with relevant standard.

Key words: circulating cooling water, scaling inhibition, corrosion inhibition, experimental research