摘要
采用硫酸对粉煤灰进行改性,并将改性后的粉煤灰用于焦化废水深度处理。根据处理效果,确定粉煤灰最佳改性条件为:H+浓度1.75 mol/L,改性温度常温,改性时间2 h,每升废水中改性后粉煤灰投加量10 g,水处理p H 3.0~4.5。在此基础上,探讨二氧化硫改性粉煤灰的可行性。实验结果表明,二氧化硫可对粉煤灰进行改性,废水COD去除率和浊度去除率分别达到77.7%和96.7%。
Fly ash was modified by H2SO4.The modified fly ash was used in the advanced treatment of coking wastewater.The modification conditions optimized according to the treatment effects were as follows:c(H+)=1.75 mol/L,room temperature,activation time 2 h,modified fly ash 10 g,pH 3.0-4.5.On this basis,the study on the feasibility of modification by sulfur dioxide was carried out.The results showed that sulfur dioxide could be used as fly ash modifier.The removal rate of COD and turbidity could reach 77.7%and 96.7%,respectively.
作者
王奕晨
张生军
田士东
张红星
李克伦
谭晓婷
Wang Yichen;Zhang Shengjun;Tian Shidong;Zhang Hongxing;Li Kelun;Tan Xiaoting(Shaanxi Coal and Chemical Technology Institute Co.,Ltd.,State Energy Key Lab of Clean Coal Grading Conversion,Xi忆an Shaanxi 710065,China)
出处
《煤化工》
CAS
2018年第2期62-65,共4页
Coal Chemical Industry
关键词
粉煤灰
酸法改性
二氧化硫
焦化废水
深度处理
fly ash
acid modification
sulfur dioxide
coking wastewater
advanced treatment
