Tang Qiang, Cui Xiaxia, Hu Zhibin, Lu Shaotian, Wang Chengjun, Tang Jau
School of Artificial Intelligence, Anhui University of Science and Technology, Huainan 232000, China.
Institute of Technological Sciences, Wuhan University, Wuhan 430072, China.
Micromachines (Basel). 2022 Sep 30;13(10):1652. doi: 10.3390/mi13101652.
Oil-water separation technology has potential applications in wastewater treatment, petroleum refining and edible oil processing. As the ultimate means in oil-water treatment, electrostatic coalescence technology has been widely used in oil fields and refineries. However, the technology has many problems, such as complex processes, electrode corrosion, and the inability to treat high-water-cut crude oil emulsions. Here, we propose a contactless method of oil-water separation by corona discharge. With corona discharge of a needle-plate electrode configuration, the oil droplet diffuses to the ITO glass surface and the water droplet oscillates at the edge of the PET film. Here, such droplet behaviors are described in detail. Based on the motion behavior of the oil and water droplet, we designed an efficient oil-water separation device. After the oil-water mixture passes through the device, the oil content in the oil region can reach 99.25% with a voltage of 8 kV. In addition, the separation speed of the oil-water mixture can also be adjusted by varying the corona discharge voltage. This paper presents a simple and innovative method for oil-water separation.
油水分离技术在废水处理、石油炼制和食用油加工等领域具有潜在应用。作为油水分离的终极手段，静电聚结技术已在油田和炼油厂中广泛应用。然而，该技术存在诸多问题，如工艺复杂、电极腐蚀以及无法处理高含水率原油乳液等。在此，我们提出一种通过电晕放电实现油水分离的非接触方法。利用针板电极结构的电晕放电，油滴扩散至ITO玻璃表面，而水滴在PET膜边缘振荡。在此，详细描述了此类液滴行为。基于油滴和水滴的运动行为，我们设计了一种高效的油水分离装置。油水混合物通过该装置后，在8 kV电压下，油区的含油率可达99.25%。此外，通过改变电晕放电电压，还可调节油水混合物的分离速度。本文提出了一种简单且创新的油水分离方法。
