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油田产出液污水处理是注水生产的关键所在,通过水质分析,该水质主要表现为矿化度高、铁含量高、CO2含量及PH值低的特点,水质极不稳定,腐蚀性很强。电化学水处理技术利用污水高矿化度,电解产生·OH、O、H2O2、Cl2(ClO-)等强氧化性物质,杀灭细菌,氧化Fe2+、S2-离子成为Fe3+和S单质并沉淀去除,实现水质稳定,平均腐蚀速率降低到0.031 mm/a,并结合油田生产实际设计的用于电化学预氧化技术处理污水的新工艺流程,现场试验取得满意效果,在跟踪研究中实现了良性循环。所在用的电化学预氧化技术机理和设计的新工艺流程为油田企业提供了一定的借鉴作用。
Oilfield effluent treatment is the key to waterflooding. Through water quality analysis, the water quality is mainly characterized by high salinity, high iron content, low CO2 content and low PH value. The water quality is very unstable and highly corrosive. Electrochemical water treatment technology uses the high salinity of sewage to produce strong oxidizing substances such as · OH, O, H2O2 and Cl2 (ClO-) by electrolysis to kill bacteria and oxidize Fe2 + and S2- ions to become Fe3 + and S and precipitate and remove , To achieve stable water quality and reduce the average corrosion rate to 0.031 mm / a. In combination with the actual design of a new process for the electrochemical oxidation of wastewater, the field test achieved satisfactory results and achieved a virtuous circle in the follow-up study . The electrochemical preoxidation technology used and the new design process provide a reference for the oilfield enterprises.