浅谈磷酸铁行业生产废水“零排放”处理工艺研究
Research on “Zero Discharge” Treatment Technology of Production Wastewater of Iron Phosphate Industry

对于新能源材料需求量大，环保要求高。磷酸铁母液及洗水为高盐废水，处理工艺为预处理–膜处理–MVR处理相结合，达到废水零排放的目的。预处理现将废水中的重金属离子及损坏膜件的物质通过化学沉淀法除去，膜处理将溶解盐类、胶体、微生物、有机物除去，处理后的水可达到生产用水级别，MVR蒸发脱盐获得高纯度的硫酸铵，冷却液再进行循环处理，达到废水零排放的目的。上述工艺结合后，可达到处理量高、低能耗及低投资、低运行成本的目的。
The demand for new energy materials is large, and the environmental protection requirements are high. The mother liquor and wash water of iron phosphate are high salt wastewater, and the treatment process is the combination of pretreatment, membrane treatment and MVR treatment, so as to achieve the purpose of zero discharge of wastewater. Now the heavy metal ions in the wastewater and the substances that damage the membrane parts are removed by chemical precipitation method, the membrane treatment will remove dissolved salts, colloids, microorganisms and organic matter, and the treated water can reach the level of production water, MVR evaporation and desalting to obtain high-purity ammonium sulfate, and the coolant is recycled to achieve the purpose of zero discharge of wastewater. The combination of the above processes can achieve the purpose of high processing capacity, low energy consumption, low investment and low operating cost.