Abstract: There are many circulating water systems with large flow level of 10000t/h in the industrial domain. The system has much of residual energy and pressure, and, by reformation of their unreasonable and unscientific parts, more recoverable energy could be excavated. The power generation system using residual energy of circulating water will transform the energy of backwater into mechanical energy, and further transform it into electric energy. If the electric energy is small, it can be feedback into system itself or feed other devices with low power demand. But for circulating water system with large flow such as thermal power plant, a independent power generation station using residual energy of circulating water could be built, and its generated electric energy could be directly transmitted to power grid. The system has realistic significance for energysaving and emissionreduction.

Key words: circulating water cooling tower, utilization of residual pressure and residual energy, power generation system using residual energy of circulating water