接触式静电喷雾喷嘴选择试验

Experiment of Nozzle Selection in Contact-charging Spray

使用红外热成像仪对接触式静电喷雾和常规喷雾的雾化角进行比对,发现接触式静电喷雾的雾化角增大,存在二次雾化现象,雾化角的变化可以反映静电喷雾的荷电和雾化性能。使用红外热成像仪对不同材质和孔径的喷嘴进行了雾化角的图像获取,以静电力导致的雾化角增量表征二次雾化程度。得出二次雾化角增量排序:相同孔径下,黄铜>不锈钢>陶瓷;相同材质下,孔径0.5mm>1.0mm>1.5mm。由此可知:接触式静电喷雾并非可任意选用现有喷嘴使用,孔径较小和导电性较高的喷嘴能取得更好的静电雾化效果。本研究为接触式静电喷雾研究、应用中的喷嘴选择提供参考。

Using infrared thermal imager to compare the atomizing angle of contact-charging spray and conventional spray,it was found that the atomizing angle of contact-charging spray increased and there was a secondary atomization phenomenon.The change of the atomizing angle could reflect the charge and atomization performance.An infrared thermal imager was used to acquire the image of the atomization angle of the nozzles of different materials and apertures,and the secondary atomization degree was characterized by the increase of the atomization angle caused by the electrostatic force.The secondary atomization angles are sorted incrementally:under the same aperture,brass>stainless steel>ceramic;under the same material,the aperture is 0.5mm>1.0mm>1.5mm.It can be known from this that the contact type electrostatic spray is not arbitrarily selected from the existing nozzles,and nozzles with smaller apertures and higher conductivity can achieve better electrostatic atomization effects.This study provides a reference for the research of contact electrostatic spray and the selection of nozzles in applications.