一种磷、氟共存废水的深度净化方法

本发明公开了一种磷、氟共存废水的深度净化方法，采用弗雷德盐的溶解-再沉淀及离子交换反应来控制受污染水中的氟的去除；采用钙离子的化学沉淀及Fe-Al-Ca除磷剂的络合沉淀来控制受污染水中的磷的去除；将弗雷德盐的溶解-再沉淀及离子交换反应和钙离子的化学沉淀及Fe-Al-Ca除磷剂的络合沉淀通过在相同的pH值变化条件以及在同一反应器中完成，实现多个除磷脱氟反应的同步进行。本发明首创以弗雷德盐作为除氟控制的吸收剂，以Fe-Al-Ca除磷剂加石灰乳控制磷的吸收的磷、氟同步去除技术，实现了在同一反应器中相同pH值变化条件下多个除磷、脱氟反应的同步进行。 The invention discloses a method for deeply purifying phosphorous and fluorine co-existing wastewater. The method comprises the following steps: controlling removal of fluorine in polluted water by adopting Friedal salt dissolution-precipitation and ionic exchange reaction; controlling removal of phosphorous in the polluted water by adopting chemical precipitation of calcium ions and complex precipitation of a Fe-Al-Ca phosphate removing agent; completing the Friedal salt dissolution-precipitation, ionic exchange reaction, chemical precipitation of calcium ions and complex precipitation of theFe-Al-Ca phosphate removing agent under the condition of the same pH value variation in the same reactor so as to realize synchronous performance of m