特殊润湿材料耦合离心处理含油乳化水的研究  

Separation and purification of oily sewage by coupling special wetting materials and centrifugation

作　　者：吴云[1] 龚海峰[1] WU Yun;GONG Haifeng(Engineering Research Centre for Waste Oil Recovery Technology and Equipment,Chongqing Technology and Business University,Chongqing 400067,China)

机构地区：[1]重庆工商大学废油资源化技术与装备工程研究中心,重庆400067

出　　处：《工业水处理》2023年第1期145-150,共6页Industrial Water Treatment

基　　金：国家自然科学基金项目(51678095);重庆市基础与前沿科技计划项目(2016jcyjA0372)。

摘　　要：针对含油污水处理领域中O/W型乳浊液净化分离困难的问题,构建了一种由超亲水/超亲油筛网膜、超疏水/超亲油海绵等特殊润湿性材料与离心力场相耦合的分离净化装置,并在验证装置分离净化效果的基础上,对处理条件和重要设计参数进行了考察。结果表明,经耦合分离装置处理后,不同来源O/W型乳浊液的水分离液纯度均达到99%以上,处理效果良好,且当处理温度为15~30℃,离心转速为1 800 r/min,材料轴心距为30 cm,处理时间为8 min时,装置处理效果最佳。温度升高使油、水和乳化剂间的互溶效果增强,促进它们的相互渗透和均匀分布,对系统的破乳分离过程不利;转速增大导致旋转液面的凹陷加深,油滴富集区位置与中心轴的距离增大,油滴与材料的接触减少,对破乳分离过程不利;当材料设置位置与油滴富集区位置接近时,油滴与分离材料的接触最多,分离效果最佳;延长处理时间虽然可以增强破乳分离效果,但过长的处理时间会导致处理成本增加。It is difficult to achieve separation and purification of oil-in-water emulsion by a single method or unit in the field of oily sewage treatment. A device coupling special wetting materials and centrifugation were designed.Based on separation effect of the device was verified,some treatment conditions and design parameters were investigated. The results showed that purity of the water-phase reached above 99% after treatment,and the effects of separation and purification was good. Furthermore,the optimal treatment effect was obtained under the condition of 15-30 ℃,rotational speed 1 800 r/min,the distance between materials and central axis 30 cm,and the treatment time 8 min. It was because increasing temperature enhances the mutual dissolution between oil,water and emulsifier,promoted their mutual penetration and uniform distribution,which was unfavorable to the process of demulsification and separation. An increase in the rotational speed would result in deeper depression of the liquid surface,and increased the distance between the enrichment area of oil droplet and the central axis,and reduced the contact of the oil droplet and separation materials,which was bad for demulsification and separation. When the special wetting materials was set close to the enrichment area of oil droplet,the oil droplets had the most contact with the materials,and the separation effect was the best. The extended treatment time could enhance the effect of processing,but too long treatment time would lead to increase of treatment cost.

关 键 词：含油污水 特殊润湿材料 离心 耦合 破乳分离 

分 类 号：X703.3[环境科学与工程—环境工程]