气旋浮高效除油技术及其在电脱盐切水预处理中的应用

原油电脱盐切水除油预处理是当前炼油行业普遍面临的一个技术难题。利用自主研发的BIPTCFU-Ⅲ-4型气旋浮含油污水处理样机(CFU)在中国石化沧州分公司首次进行了非常态下电脱盐切水除油预处理的现场试验研究。结果表明:入口含油浓度在7 632.8~10 658.0 mg/L之间波动时,单级CFU稳定运行时的除油率可达95%,两级CFU稳定运行时的除油率保持在95.6%~98.6%,CFU出水含油浓度可以稳定在131.8~263.5 mg/L之间,完全满足后续污水处理流程的进水要求,而且具有密闭运行、水力停留时间短等优势。气旋浮含油污水复合处理技术为电脱盐切水分级达标处理提供了一条切实可行的技术解决方案,值得进一步开展工程放大应用研究。

CYCLONE-AIR FLOTATION TECHNOLOGY AND ITS APPLICATION IN OIL REMOVAL PRE-TREATMENT FOR ELECTRIC DESALTING WASTEWATER

Oil pre-treatment of electric desalting wastewater is a difficult technical problem for crude oil refining industry. This paper introduces the field test by using independent R&D BIPTCFU-III-4 type centrifugal flotation prototype in SINOPEC Cangzhou Company, which is the first time to use centrifugal flotation technology to deal with electric desalting wastewater under harsh conditions. The field test has demonstrated that, when the inlet electric desalting wastewater oil content fluctuates between 7632.8-10 658.0 mg/L, the oil removal efficiency can be reached 95.0% with single-stage CFU and 95.6%-98.6% with two-stage CFUs in series. The outlet oil content can be controlled between 131.8-263.5 mg/L, and can totally meet the quality requirements of the influent of subsequent wastewater treatment processes. The centrifugal flotation technology also has some advantages such as enclosed operation, short hydraulic retention time. It can provide a feasible scheme for dealing with electric desalting wastewater, and deserve further exploration in engineering amplification applications.