除氟剂HJ-DF-07用于煤化工含氟废水深度处理实验研究

Experimental study on defluorinating agent HJ-DF-07 used for advanced treatment of fluorine-containing wastewater in coal chemical industry

采用自主研发的除氟药剂HJ-DF-07对煤化工含氟废水进行了深度除氟实验研究。比对了市场常见的几种除氟药剂和HJ-DF-07的除氟效果;考察了废水pH值、反应时间、两级除氟工艺中HJ-DF-07各自投加量等因素对除氟剂HJ-DF-07氟去除率的影响。结果表明:除氟剂HJ-DF-07对氟离子的去除率比其他几种除氟剂高出约20个百分点,其最佳操作条件为:pH值10.37,反应时间10 min,两级除氟工艺除氟剂投加量分别为3.0 mL/L和2.0 mL/L,相应的一级、二级氟去除率分别为81.74%和92.82%,最终二级除氟装置出水氟离子质量浓度可降至0.976 mg/L,总氟去除率可达98.69%。

An experimental study was made on using self-developed defluorinating agent HJ-DF-07 for advanced defluorination of fluorine-containing wastewater in coal chemical industry.The defluorination effect of several common defluorinating agents and HJ-DF-07 was compared.The impacts of pH value of wastewater,reaction time and dosage of HJ DF-07 in two-stage defluorination process on the fluorine removal rate of HJ-DF-07 were investigated.The results showed that the removal rate of fluoride ions by HJ-DF-07 was about 20%higher than that by other defluorinating agents.The optimal operating conditions were as follows:The pH value was 10.37,the reaction time was 10 min,the dosage of defluorinating agent in the two-stage defluorination process was 3.0 mL/L and 2.0 mL/L,respectively,and the corresponding primary and secondary fluoride removal rates were 81.74%and 92.82%,respectively.The final fluoride ion concentration in the effluent of the secondary defluorination unit could be reduced to 0.976 mg/L,and the total fluorine removal rate could reach 98.69%.