Abstract: The water circulating pump of the 2×300MW unit of China Huadian Baotou Donghua Heat and Power Corporation Limited is driven by 50Hz power supply and is difficult to adjust the circulating water flow. In winter, the circulating water flow is smaller, and the serious icing occurs in the water tower, which causes that the pipe of the condenser is blocked, the terminal temperature difference and the subcooled temperature are increased, and the water consumption is increased too. According to the technical argumentation, the two units and single circulating water tower operation technology was adopted, the icing in water tower was avoided, the terminal temperature difference and the subcooled temperature were decreased, the water consumption was also reduced, and obvious economical benefits were obtained. 

Key words: single circulation water tower, icing, terminal temperature difference, subcooled temperature, water consumption, economic benefit