Treatment of electric desalting wastewater by swirling flotation coupled with medium coalescence
Treatment of electric desalting wastewater by swirling flotation coupled with medium coalescence
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DOI：
10.1016/j.jece.2021.106055
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发表时间：
2021-10
影响因子：
7.7
通讯作者：
Wu Shihan;Liu Yiqian;Pang Zhicheng;Dai Pinyi;Qiang Yang;Hao Lu
中科院分区：
文献类型：
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作者：
Wu Shihan;Liu Yiqian;Pang Zhicheng;Dai Pinyi;Qiang Yang;Hao Lu
高含油、强乳化的电脱盐废水的处理是炼油厂最困难的问题之一。使用旋流浮选与介质聚结相结合进行了工业试点研究。自适应结构是为旋流浮选而设计的，聚结介质是纤维和颗粒的组合。研究了流量、注气方式、气体流量和介质床深度对分离性能的影响。在最佳运行条件下，当进口含油量为400~2500mg/L时，旋流浮选除油效率为90%，总除油效率高达98.63%。出水含油量、悬浮物含量、化学需氧量（COD）可分别稳定在30毫克/升、15毫克/升、700毫克/升以下，满足下游处理厂排放要求。该研究为电除盐废水的处理提供了一种新的技术思路，具有运行弹性大、处理过程快速、效率高等优点。
The treatment of electric desalting wastewater with a high oil content and strong emulsification is one of the most difficult problems in refineries. An industrial pilot study was carried out using swirling flotation coupled with medium coalescence. The self-adaptive structure was designed for swirling flotation and the coalescence medium was a combination of fibers and granules. The effects of the flow rate, gas injection mode, gas flow rate, and the depth of the medium bed on the separation performance were investigated. Under optimum operating conditions, when the inlet oil content is 400–2500 mg/L, the oil removal efficiency of the swirling flotation is 90% and the total oil removal efficiency is up to 98.63%. The oil content, suspended solids content, and chemical oxygen demand (COD) of the effluent can be stabilized below 30 mg/L, 15 mg/L, and 700 mg/L, respectively, which meets the requirements for discharge to a downstream treatment plant. This study provides a new technical idea for the treatment of electric desalting wastewater with the advantages of a high operation elasticity, a rapid treatment process, and a high efficiency.