Separating oil from oil-water emulsions by electroflotation technique

Separations Technology Pub Date : 1996-02-01 DOI:10.1016/0956-9618(95)00136-0

Ashraf Y. Hosny

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引用次数: 137

Abstract

The separation of finely dispersed oil from oil-water emulsions was carried out in an electroflotation cell which has a set of electrodes, a lead anode and stainless steel screen cathode. The effect of operating parameters on the performance of the batch cell was examined. The parameters investigated are electrical current, oil concentration, flotation time and flocculant agent concentrations. A well-fitted empirical correlation represents the change in percentage oil removal with wide range of operating conditions was obtained. The oil separation reached 65% at optimum conditions; 75% in the presence of NaCl (3.5% by wt. of solution); and 92% with the presence of NaCl and at optimum concentration of flocculant agent. Electrical energy consumption varied from 0.5 to 10.6 KWh/m³ according to experimental conditions. An equation relates the K with I was obtained. The general form of the equation is K = constant (I)ⁿ; where the n values are 0.6 4 and 0.62 for solutions with and without NaCl, respectively. The previous relation is valid only for current values from 0.3 to 1.2 A. The effect of emulsion flow rate on the separation process was determined on continuous scale.

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电浮法分离油水乳状液中的油

在一组电极、铅阳极和不锈钢筛网阴极的电浮选池中对油水乳液进行了细分散油的分离。考察了操作参数对间歇池性能的影响。考察了电流、油浓度、浮选时间和絮凝剂浓度。在较宽的操作条件下，得到了一个拟合良好的经验相关性。在最佳条件下，油分离率达到65%;75%在NaCl存在下(溶液重量为3.5%);在NaCl存在和最佳絮凝剂浓度下，絮凝率为92%。根据实验条件，电能消耗在0.5 ~ 10.6 KWh/m3之间。得到了K与I的关系式。方程的一般形式是K = constant (I)n;其中，加入和不加入NaCl溶液的n值分别为0.6 4和0.62。前面的关系仅对0.3到1.2 A的电流值有效。在连续尺度上测定了乳化液流速对分离过程的影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Separations Technology

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