倡导中的美国分用途供水系统  

Proposal for Water Supply Systems with Different Goals in United States

作　　者：郝晓地[1] 李程[1] 

机构地区：[1]北京建筑工程学院可持续环境生物技术研发中心,北京100044

出　　处：《中国给水排水》2009年第10期102-105,共4页China Water & Wastewater

基　　金：国家科技支撑计划重点项目(2006BAJ01B03-02);北京市属市管高等学校人才强教计划资助项目(BJE10016200611)

摘　　要：美国现存供水管网系统的管径是按照消防用水最大流量确定的。由于现在火灾频率已变得很低,使得管网流速变缓,导致供水被输送到用户端时水质下降、甚至恶化。为此,美国已开始倡导并应用分用途供水的双管道供水系统,以小管径的不锈钢管输送直饮水,并保留传统管道作为消防等非饮用水之用。这样不仅可以达到供应直饮水的目的,而且可大大降低非饮用水的处理成本。另外,中水也可纳入传统管道系统,使分用途供水第二条管道铺设成本有所降低。Conventional water supply pipeline system in United States was sized to satisfy the need of fire control with large flows. Due to low frequencies of fire as a disaster, slow water flow velocities are often caused in the conventional system now, which results in poor water qualities at the user ends. For this reason, America proposes dual water supply systems： a small stainless pipeline for drinking water and another large pipeline （the conventional system） for non-drinking system mainly for fighting fire. In this way, drinking water quality can be easily satisfied at the user ends. Moreover, the treatment cost for non-drinking water can be largely reduced. Besides, reclaimed/recycled water from wastewater treatment plants can be introduced into the conventional system, which can thus avoid a large reclaimed water pipeline.

关 键 词：分用途供水 消防用水 直饮水 中水 双供水管道系统 

分 类 号：TU991[建筑科学—市政工程]