环氧氯丙烷生产废水的资源化处理技术

Reutilization Technology of Epichlorohydrin Production Wastewater

采用催化湿式过氧化物氧化法(CWPO)处理环氧氯丙烷生产废水,考察了反应温度、反应时间、反应pH、双氧水和FeSO4·7H2O加入量及投加方式等因素对TOC去除率的影响。实验结果表明:CWPO工艺适宜的反应条件为反应温度90℃,反应pH 2.0～3.0,FeSO4·7H2O2加入量7.50～8.75 g/L,双氧水加入量75 mL/L,反应时间100 min;双氧水和Fe2+分多次投加时的TOC去除效果明显优于一次性投加;优化条件下,环氧氯丙烷废水经CWPO工艺处理后,TOC由1 790 mg/L降至138 mg/L,符合氯碱厂隔膜电解槽进槽盐水的要求,可以资源化利用。

Epichlorohydrin production wastewater was treated by catalytic wet peroxide oxidation process. The factors affecting TOC removal rate were studied, such as reaction temperature, reaction time, reaction pH, H2O2 dosage, FeSO4 · 7H2O2 dosage and dosing mode. The experimental results show that： The TOC removal rate by multiple dosing of H2O2 and Fe2＋ is significantly higher than that by once dosing; Under the conditions of reaction temperature 90℃, reaction time 100 min, reaction pH 2.0-3.0, H2O2 dosage 75 mL/L and FeSO4 ·7H2O2 dosage 7.50-8.75 g/L, the wastewater TOC can be decreased from 1 790 mg/L to 138 rag/L, which can meet the requirement for the influent of diaphragm electrolyzer in chloro-alkali plant.