软水设备树脂再生产生的废盐水如何处理
环保要求全盐量不能超标
推荐回答（1个）
由于水的硬度主要由钙、镁形成及表示，故一般采用阳离子交换树脂(软水器)，将水中的Ca2+、Mg2+（形成水垢的主要成份）置换出来，随着树脂内Ca2+、Mg2+的增加，树脂去除Ca2+、Mg2+的效能逐渐降低。
当树脂吸收一定量的钙镁离子之后，就必须进行再生，再生过程就是用盐箱中的食盐水冲洗树脂层，把树脂上的硬度离子在置换出来，随再生废液排出罐外，树脂就又恢复了软化交换功能。
由于水的硬度主要由钙、镁形成及表示由于水的硬度主要由钙、镁形成及表示钠离子交换软化处理的原理是将原水通过钠型阳离子交换树脂，使水中的硬度成分Ca2+、Mg2+与树脂中的Na+相交换，从而吸附水中的Ca2+、Mg2+，使水得到软化。
软水设备工作流程及工作要求
软水设备工作流程工作(有时叫做产水，下同)、反洗、吸盐(再生)、慢冲洗(置换)、快冲洗五个过程。不同软化水设备的所有工序非常接
近，只是由于实际工艺的不同或控制的需要，可能会有一些附加的流程。任何以钠离子交换为基础的软化水设备都是在这五个流程的基础上发展来的(其中，全自动软化水设备会增加盐水重注过程)。
反洗：工作一段时间后的设备，会在树脂上部拦截很多由原水带来的污物，把这些污物除去后，离子交换树脂才能完全曝露出来，再生的效果才能得到保证。反洗过程就是水从树脂的底部洗入，从顶部流出，这样可以把顶部拦截下来的污物冲走。这个过程一般需要5-15分钟左右。
吸盐(再生)：即将盐水注入树脂罐体的过程，传统设备是采用盐泵将盐水注入，全自动的设备是采用专用的内置喷射器将盐水吸入(只要进水有一定的压力即
可)。在实际工作过程中，盐水以较慢的速度流过树脂的再生效果比单纯用盐水浸泡树脂的效果好，所以软化水设备都是采用盐水慢速流过树脂的方法再生，这个过
程一般需要30分钟左右，实际时间受用盐量的影响。
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