低强度旋流气浮处理含油污水实验研究

发布时间：2018-06-04 20:48

本文选题：含油污水 + 水处理　；参考：《中国石油大学学报(自然科学版)》2016年03期

【摘要】：低强度旋流气浮技术是基于弱离心力场的非常规气浮技术,利用离心力强化油滴与气泡的碰撞、黏附,可提高浮选效率。为了优化低强度旋流气浮的浮选性能,研究旋流强度、含油量、回流比和气泡注入方式(顺流、逆流)对浮选性能的影响。结果表明:旋流场处于低雷诺数湍流运动时,气泡与油滴能高效地完成碰撞、黏附、浮升,同时可避免湍流对气泡-油滴聚合体稳定性的破坏;低强度旋流浮选时,气浮筒对水力波动的适用能力强,且能有效地处理低含油量污水;气浮筒在顺流或逆流时具有不同的最优浮选区间,当入口旋流强度为17.0 g(顺流)或13.0 g(逆流)时,浮选效果最佳,当含油量为500 mg/L,回流比为20%~35%(顺流)或30%~35%(逆流)时,除油效率不低于75%。
[Abstract]:Low strength swirl flotation technology is an unconventional flotation technology based on weak centrifugal force field. Centrifugal force is used to enhance the collision of oil droplets and bubbles and adhesion can improve the flotation efficiency. In order to optimize the flotation performance of low strength swirl flotation, the effects of swirl strength, oil content, reflux ratio and bubble injection (downstream, countercurrent) on flotation performance were studied. The results show that when the swirl field is in the turbulent motion of low Reynolds number, the bubble and the oil droplet can collide, adhere and rise efficiently, and at the same time, the turbulence can avoid the destruction of the stability of the bubble and oil droplet polymer. The gas buoy has a strong adaptability to hydraulic fluctuation and can effectively deal with low oil content sewage, and the gas buoy has different optimal flotation intervals when the inlet swirl intensity is 17.0 g (downstream flow) or 13.0 g (countercurrent), the floatation zone of the gas buoy is different when the inlet swirl intensity is 17.0 g (downstream) or 13.0 g (countercurrent). When the oil content is 500 mg / L and the reflux ratio is 20 / 35 (downstream) or 30 / 35 (countercurrent), the oil removal efficiency is not less than 75%.
【作者单位】：中国石油大学储运与建筑工程学院;中国石油天然气股份有限公司青海油田分公司;
【基金】：国家自然科学基金项目(51574273) 山东省自然科学基金项目(ZR2014EEM045) 中央高校基本科研业务费专项(15CX05006A)
【分类号】：X741

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