在北方寒冷地区，机械通风冷却塔冬季运行时常在冷却塔出口形成羽雾，对周围生态环境造成影响。基于机械通风冷却塔羽雾的形成机理，研究了该型塔消除羽雾的有效措施，通过实际应用得出结论：干湿联合冷却塔是消除机械通风冷却塔羽雾的有效途径之一。

Water Resources and Hydropower Research，Beijing 100038, China） In the cold district of north China， plume usually appears around the outlet of mechanical-draft cooling tower, which would impact on surrounding environment. In this paper we study the formation mechanism and the prevention method of the plume around mechanical-draft cooling tower. It was found that the using of dry-wet joint cooling towers is one of the effective measures to eliminate the plume.