第17章过滤17.1过滤概述1.过滤:指以石英砂等粒状滤料层截留水中悬浮杂质,从而使水获得澄清的工艺过程。过滤对生活饮用水的水厂来说,必须有过滤,这是不可缺少的,它是保证饮用水卫生安全的重要措施。2.作用:①降低水的浊度。从沉淀池过来的水浊度一般在10度以下,过滤水的浊度不超过1NTU。②水中有机物、细菌乃至病毒等将随水的浊度降低而被部分去除。①普通快滤池工作过程:②过滤③冲洗:·:…···…·∶··:::··::··:··∶:…∶.···…·∶∶··∶:::∶·。∶·:…。∶.···…∶:::。∶·。∶。·:。…。∶。∶。·。·∶···∶∶··。∶::。:∶·∶··∶:::∶∶·:·。∶·:…。∶.···…·∶∶···∶:∶·:1.过滤过程过滤过程:·:…···…·∶··:::··::··:··∶:…∶.···…·∶∶··∶:::∶·。∶·:…。∶.···…∶:::。∶·。∶。·:。…。∶。∶。·。·∶···∶∶··。∶::。:∶·∶··∶:::∶∶·:·。∶·:…。∶.···…·∶∶···∶:∶·:1.过滤过程过滤过程:·:…···…·∶··:::··::··:··∶:…∶.···…·∶∶··∶:::∶·。∶·:…。∶.···…∶:::。∶·。∶。·:。…。∶。∶。·。·∶···∶∶··。∶::。:∶·∶··∶:::∶∶·:·。∶·:…。∶.···…·∶∶···∶:∶·:过滤过程1.过滤过程1.过滤过程过滤过程:·:…···…·∶··:::··::··:··∶:…∶.···…·∶∶··∶:::∶·。∶·:…。∶.···…∶:::。∶·。∶。·:。…。∶。∶。·。·∶···∶∶··。∶::。:∶·∶··∶:::∶∶·:·。∶·:…。∶.···…·∶∶···∶:∶·:1.过滤过程过滤过程:·:…···…·∶··:::··::··:··∶:…∶.···…·∶∶··∶:::∶·。∶·:…。∶.···…∶:::。∶·。∶。·:。…。∶。∶。·。·∶···∶∶··。∶::。:∶·∶··∶:::∶∶·:·。∶·:…。∶.···…·∶∶···∶:∶·::·:…···…·∶··:::··::··:··∶:…∶.···…·∶∶··∶:::∶·。∶·:…。∶.···…∶:::。∶·。∶。·:。…。∶。∶。·。·∶···∶∶··。∶::。:∶·∶··∶:::∶∶·:·。∶·:…。∶.···…·∶∶···∶:∶·:1.过滤过程过滤过程:·:…···…·∶··:::··::··:··∶:…∶.···…·∶∶··∶:::∶·。∶·:…。∶.···…∶:::。∶·。∶。·:。…。∶。∶。·。·∶···∶∶··。∶::。:∶·∶··∶:::∶∶·:·。∶·:…。∶.···…·∶∶···∶:∶·:1.过滤过程过滤过程:·:…···…·∶··:::··::··:··∶:…∶.···…·∶∶··∶:::∶·。∶·:…。∶.···…∶:::。∶·。∶。·:。…。∶。∶。·。·∶···∶∶··。∶::。:∶·∶··∶:::∶∶·:·。∶·:…。∶.···…·∶∶···∶:∶·:1.过滤过程过滤过程:·:…···…·∶··:::··::··:··∶:…∶.···…·∶∶··∶:::∶·。∶·:…。∶.···…∶:::。∶·。∶。·:。…。∶。∶。·。·∶···∶∶··。∶::。:∶·∶··∶:::∶∶·:·。∶·:…。∶.···…·∶∶···∶:∶·:1.过滤过程过滤过程:·:…···…·∶··:::··::··:··∶:…∶.···…·∶∶··∶:::∶·。∶·:…。∶.···…∶:::。∶·。∶。·:。…。∶。∶。·。·∶···∶∶··。∶::。:∶·∶··∶:::∶∶·:·。∶·:…。∶.···…·∶∶···∶:∶·:1.过滤过程过滤过程2.反冲洗过程:·:…···…·∶··:::··::··:··∶:…∶.···…·∶∶··∶:::∶·。∶·:…。∶.···…∶:::。∶·。∶。·:。…。∶。∶。·。·∶···∶∶··。∶::。:∶·∶··...