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水的硬度测定数据范围
更新时间: 2022-12-09 13:28:40  

0~75mg/L极软水,75~150mg/L软水,150~300mg/L中硬水,300~450mg/L硬水,450~700mg/L高硬水,700~1000mg/L超高硬水,>1000mg/L特硬水。

天然水中某些盐类溶解为阳离子和阴离子,在加热蒸发浓缩的过程中Ca2+、Mg2+等离子不断地与水中某些阴离子结合成难溶物质而析出,并生成水垢。

水垢的导热性能很差,从而阻碍了热交换,大大降低了锅炉的热效率,既浪费燃料又易烧坏部件,并危及安全,造成不良后果。

为了消除或减少这些危害,就要把水中能形成水垢的硬度成分,如钙、镁离子,还有其他高价金属离子如铁、铝、锰等予以去除。

关键词: 硬度 测定 数据 范围

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