高氯废水两段脱氯试验研究

Two-Stage Dechlorination Test of High Chlorine Wastewater

针对铜冶炼企业生产过程中产生的含氯20~40 g/L的高氯废水,采用氧化亚铜两段脱氯工艺,考察了氧化亚铜用量、反应温度、反应时间、搅拌速度和二次氧化亚铜用量等对高氯废水脱氯的影响。结果表明:氧化亚铜用量为n(Cu)/n(Cl)=1.3(n为物质的量),搅拌速度60 r/min,在70℃下反应2.0 h,二段氧化亚铜用量为n(Cu)/n(Cl)=1.2,一次高氯废水脱氯率为92.31%,二次高氯废水脱氯率为88.91%,最终废水含氯250 mg/L以下,脱氯效果较好。

Aiming at the high chlorine wastewater containing 20~40 g/L chlorine produced in the production process of copper smelting enterprises, a two-stage dechlorination process of cuprous oxide was adopted, the effects of cuprous oxide dosage, reaction temperature, reaction time, stirring speed and secondary cuprous oxide dosage on the dechlorination of high chloride wastewater were investigated. The results showed that the dosage of cuprous oxide was n(Cu)/n(Cl)=1.3, the stirring speed was 60 r/min, the reaction was carried out at 70 ℃ for 2.0 h, and the dosage of second-stage cuprous oxide was n(Cu)/n(Cl)=1.2, the dechlorination rate of the primary high-chlorination wastewater was 92.31%, and the dechlorination rate of the secondary high-chlorination wastewater was 88.91%.The final wastewater contained less than 250 mg/L of chlorine, and the dechlorination effect was better.