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双层滤池中无烟煤滤料石英砂滤料产生积泥的原因

发布时间:2019-12-06
  石英砂滤料同无烟煤滤料配合使用是目前我国各大水厂普遍采用的水处理解决方案。石英砂滤料是以天然石英矿床为原料,经过破碎水洗精选而成。呈多棱角纯白色有光泽的结晶体,具有足够的机械强度和化学稳定性。无烟煤滤料采用优质原煤为原料,经精选、破碎、和两次筛分而成,外观光泽好,呈球状,机械强度高,抗压性能好,化学性能稳定,不含有毒物质,耐磨损,在酸性、中性、碱性水中均不溶解,无烟煤颗粒表面粗糙,有良好的吸附能力,孔隙率大(≥52%),有高的含污能力,质量轻,所需反冲洗强度低,可节省大量反冲洗水量及电能。

  通常情况下,双层滤料滤池中要考虑石英砂滤料的粒径要求下层滤料粒径小于上层滤料粒径,以保证下层滤料的有效性和充分利用。上层装填滤料密度要小,以保证反洗之后分层复原,如果上层密度大,那么经过反洗之后上层的滤料沉到下层了。 以两层滤床为例,上层滤料颗粒大,密度小的轻质滤料组成,如无烟煤滤料、 滤料;下层滤料粒径小,密度大,一般为普通石英砂滤料组成;形成了上层无烟煤滤料起粗滤作用,水头损失小,下层水处理石英砂滤料起精滤作用,截污能力强,这样就充分发挥了多介质滤床的作用,即水头损失小,过滤效果好的特点,充分发挥了各种滤料自身的的优点。
双层滤池中无烟煤滤料石英砂滤料产生积泥的原因

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