摘要
采用气浮—磁分离工艺处理某石化企业的含油废水,重点考察了磁分离单元的工艺条件对除油率的影响。实验结果表明磁分离单元的最佳工艺条件为:絮凝剂聚合氯化铝加入量25 mg/L,磁种加入量100 mg/L,磁场强度40 mT,搅拌条件为先以150 r/min的转速搅拌2 min,再以50 r/min的转速搅拌5 min。在最佳工艺条件下进行气浮—磁分离工艺除油实验,在进水油质量浓度平均为29.5 mg/L时,气浮单元出水油质量浓度平均为8.5 mg/L,除油率平均为71.1%;磁分离单元出水油质量浓度平均为4.7 mg/L,除油率平均为44.1%;总除油率平均为83.8%。
The oily wastewater of a petrochemical enterprise was treated by flotation -magnetic separation process. The effects of the process conditions in the magnetic separation unit on the oil removal rate were studied especially. The optimum process conditions are as follows： flocculant PAC dosage 25 mg/L, magnetic seed dosage 100 mg/L, magnetic field strength 40 mT, stirring time 2 min with 150 r/min of rotation speed, stirring time 5 rain with 50 r/min of rotation speed. Under theses conditions, and when the average oil mass concentration of the influence is 29.5 mg/L, the average oil mass concentration of the effluent from the flotation unit is 8.5 mg/L with 71. 1% of oil removal rate, and that of the effluent from the magnetic separation unit is 4.7 mg/L with 44.1% of oil removal rate. The average total oil removal rate is 83.8 %.
出处
《化工环保》
CAS
CSCD
北大核心
2011年第4期342-345,共4页
Environmental Protection of Chemical Industry
关键词
磁分离
磁种
气浮
絮凝
除油
废水处理
magnetic separation
magnetic seed
flotation
flocculation
oil removal
wastewater treatment
