摘要
采用两级氧化法处理油田压裂返排液。在次氯酸钠、次氯酸钙、过氧化氢、高锰酸钾4种氧化剂中,次氯酸钠的氧化效果最好。以次氯酸钠作为一级氧化剂,进行一级氧化处理;再分别采用次氯酸钙、过氧化氢、高锰酸钾进行二级氧化处理。在次氯酸钠加入量为40 mL/L、一级氧化反应时间为30 min、二级氧化反应时间为30 min、初始废水COD为3 976 mg/L的条件下,二级氧化剂过氧化氢、次氯酸钙、高锰酸钾的最佳加入量分别为80,40,40 mL/L,对应的COD去除率分别为82.60%,71.50%,83.50%。
Oilfield fracturing flow-back fluid was treated by two-stage oxidation process.Sodium hypochlorite has the best oxidation effect among the 4 oxidants of sodium hypochlorite,calcium hypochlorite,hydrogen peroxide,and potassium permanganate.Sodium hypochlorite was used as the firststage oxidant and calcium hypochlorite,hydrogen peroxide,potassium permanganate were used separately as the second-stage oxidants.Under the conditions of sodium hypochlorite dosage 40 mL/L,first-stage oxidation time 30 min,second-stage oxidation time 30 min and initial wastewater COD 3 976 mg/L,the optimum dosages of hydrogen peroxide,calcium hypochlorite,potassium permanganate are 80,40,40 mL/L,and the COD removal rates are 82.6%,71.5%,83.5%,respectively.
出处
《化工环保》
CAS
CSCD
北大核心
2013年第3期249-251,共3页
Environmental Protection of Chemical Industry
关键词
氧化
油田压裂液
返排液
废水处理
oxidation
oilfield fracturing fluid
flow-back fluid
wastewater treatment
