关键词: 风险分析, 返排液, 电絮凝, 控制措施

Abstract: The electroflocculation technology integrates four kinds of functions covering oxidation, reduction, flocculation and air flotation into one. And its effects of removing suspended solids and petroleum in the fracturing flow back are obvious, and it can also remove some COD. The use of this technology to treat the fracturing flow back liquid has the advantages of less solid waste production, less secondary pollution, and is beneficial to reuse in the later stage. However, there are not many industrial applications of fracturing flow back liquid treatment by electroflocculation, and there exist such risks as toxic and harmful, flammable gas accumulation, electric leakage and environmental pollution. In this paper, three key risk points in the process of fracturing flow back liquid treatment by electroflocculation are analyzed and evaluated one by one. Control measures are proposed to standardize the technology and management, which lays the foundation for the safe implementation of the technology.

Key words: risk analysis, fracturing fluid, electroflocculation, control measures