利用混凝-超滤膜法研究乳化油水的分离过程

发布时间：2018-02-27 20:47

本文关键词： 混凝超滤油田采出水乳化油油水分离　出处：《高校化学工程学报》2017年02期 　论文类型：期刊论文

【摘要】：实验主要考察混凝-超滤膜法联用处理油田采出水中乳化油的效果。选用三种混凝剂Al_2(SO_4)_3,FeCl_3,AlCl_3用于预处理过程,通过改变混凝剂用量和进料液性状来筛选出效果优异的混凝剂,并对超滤膜在处理过程中操作参数的选择及膜污染情况进行了研究。结果表明三氯化铁对处理一定范围内pH值和温度的油田采出水有更好的适应性,对浊度及TOC(总有机碳)的去除效果也最好,TOC去除率达96%以上,但TOC的最终含量在23 mg·L~(-1)。通过考察膜通量、TOC含量和浊度值以及借助SEM表面微观分析手段,发现混凝-超滤膜法的联用不仅可以使TOC的最终含量降低到13 mg·L~(-1)以下,达到油田回注水的水质要求,而且还可以减轻膜污染程度,保证膜通量在一段时间内的稳定性。
[Abstract]:The effect of coagulation-ultrafiltration membrane method on the treatment of emulsified oil in oilfield produced water was investigated. Three coagulants Al2SO4S _ 4 / T _ 4 and FeCl _ 3AL _ Cl _ 3 were used in the pretreatment process, and the coagulants with excellent effect were screened by changing the dosage of coagulant and the characteristics of feed liquid. The selection of operating parameters and membrane fouling during the treatment of ultrafiltration membrane were studied. The results show that FeCl _ 3 has better adaptability to treating oilfield produced water with pH value and temperature within a certain range. The removal efficiency of turbidity and total organic carbon (TOC) was also better than 96%, but the final content of TOC was 23 mg 路L ~ (-1). The membrane flux and turbidity were investigated by means of SEM surface microanalysis. It is found that the combined use of coagulation and ultrafiltration can not only reduce the final content of TOC to less than 13 mg 路L ~ (-1), but also reduce the membrane fouling and ensure the stability of membrane flux for a period of time.
【作者单位】：浙江大学海洋学院;浙江大学化学工程与生物工程学院;
【基金】：国家自然科学基金(21406193)
【分类号】：X741

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