At present, reclamation of wastewater has become one of the main means to realize energy-saving and ejection-decreasing, since it could not only reduce the social discharge of pollutants, but also provide more economical source for industrial water. Around 90% of water consumption of power plant is cooling water and boiler feed water. Therefore, the sewage to be reused for cooling water and boiler feed water can protect precious water resource, achieve cyclic utilization of wastewater and advance va...