一、立项背景“水质安全”与“加强生活节水技术及器具开发”已经列入《国家中长期科学和技术发展规划纲要》,这充分体现了国家对水质安全和节水技术研究的重视。二次供水水质安全与节水关键技术研究是城镇水质保障与节水的关键环节与最终体现,因此这一领域的研究将对行业及整个社会具有重要和深远的影响。1、二次供水是城镇供水体系中的重要环节近年来随着城镇建设的快速发展和高层建筑数量的不断增 First, the background of the project “Water quality and safety ” and “Strengthening the living water saving technology and appliance development ” has been included in the “national long-term science and technology development plan”, which fully reflects the national water quality and safety and water-saving technologies Research emphasis. Secondary water quality and water conservation The key technology research is the key link and the final embodiment of urban water quality protection and water conservation, so the research in this field will have an important and far-reaching impact on the industry and society as a whole. 1, secondary water supply is an important part of urban water supply system In recent years, with the rapid development of urban construction and the continuous increase of the number of high-rise buildings