氨法磷酸铁废水“零排放”工程实例  

An example of“zero discharge”project of iron phosphate wastewater from ammonia processes

作　　者：庄力 程军军 董凯 郑修军 代奇志 ZHUANG Li;CHENG Junjun;DONG Kai;ZHENG Xiujun;DAI Qizhi(Jiangsu Jiuwu High-Tech Co.,Ltd.,Nanjing 211808,China)

机构地区：[1]江苏久吾高科技股份有限公司,南京211808

出　　处：《膜科学与技术》2025年第2期146-152,共7页Membrane Science and Technology

摘　　要：以某企业磷酸铁生产废水“零排放”工程为例,从水质特点、工艺流程、设计参数、处理效果及经济效益等方面介绍了以“陶瓷膜+反渗透+MVR”为核心的“零排放”系统。回用水电导率<10μS/cm,蒸发结晶所得硫酸铵盐品质满足《肥料级硫酸铵》(GB/T 535-2020)Ⅰ型产品要求。实践证明,陶瓷膜能够高效分离磷酸铁生产废水中的沉淀物,且再生性能优异,以陶瓷膜为核心的预处理工艺确保了反渗透和MVR系统的稳定运行。按处理水量折算,吨水总运行成本2.51元,每年可节约用水260万t,具备良好的经济、环境效益。Taking the“zero discharge”project of iron phosphate production wastewater of an enterprise as an example,the“zero discharge”system with“ceramic membrane+reverse osmosis+MVR”as the core was introduced from the aspects of water quality characteristics,process flow,design parameters,treatment effect and economic benefits.The conductivity of recycled water was less than 10μS/cm,and the quality of ammonium sulfate salt obtained by evaporation and crystallization met the requirements of type I products of“Fertilizer Grade Ammonium Sulfate”(GB/T 535-2020).Practice has proven that ceramic membranes could efficiently separate precipitates from wastewater from iron phosphate production,and had excellent regeneration performance.The pre-treatment process with ceramic membranes as the core ensured the stable operation of reverse osmosis and MVR systems.According to the conversion of treated water,the total operating cost was 2.51 yuan per ton of water,which could save 2.6 million tons of water every year,and had good economic and environmental benefits.

关 键 词：磷酸铁 陶瓷膜 反渗透 MVR 零排放 

分 类 号：TQ028[化学工程] X703[环境科学与工程—环境工程]