电脱盐含油废水除油工艺应用研究

Application Study of Oil Removal Process for Oily Wastewater from Electric Desalting

原油电脱盐含油废水由于乳化带油严重,破乳分离困难,处理难度大。文章对目前工业化应用技术成熟的旋流油水分离、化学破乳及电化学3种电脱盐含油废水除油工艺,在工艺流程、工业应用现状、应用效果等几方面进行了对比研究。结果表明,电化学除油工艺具有除油率高、效果稳定、费用低、设备简单、抗冲击力强、占地面积小等优势,除油率和COD去除率大于90%,对悬浮物、胶体、重金属等也有一定的去除效果,具有较好的应用前景。

The oily wastewater from electric desalting of crude oil is seriously emulsified with oil,and it is difficult to break the emulsion and separate the oil.In this paper,a comparative study was conducted on the three technologies of oil removal from oil-bearing wastewater,which were cyclone oil-water separation,chemical demulsification and electrochemistry,in terms of process flow,industrial application status and application effect.The results shown that the electrochemical oil removal process had the advantages of high oil removal rate,stable effect,low cost,simple equipment,strong impact resistance and small footprint.The oil removal rate and COD removal rate were more than 90%,and it also had a certain removal effect on suspended solids,colloid,heavy metals,etc..As a conclusion and prospect,the electrochemical oil removal process could be a suitable and feasible method for the treatment of oily wastewater.