气携式水力旋流器分离性能试验

Separation characteristics experimental study of gas-injected hydrocyclone

利用空气压缩机、Nikuni气液混合泵对旋流器单体进行注气试验.通过注入的微气泡捕获微小油滴形成的油-气复合体,在离心力的作用下,气泡将携带油滴运移至核心处,完成气浮选和旋流分离的协同效应,从而实现油水高效分离.试验结果表明:采用注气方法可改善水力旋流器的分离效果,但空气压缩机单点注气破坏流场的稳定,旋流器分离效率的提高并不明显;空气压缩机入口注气、微孔管旋流腔注气与采用Nikuni气液混合泵注气3种条件下,水力旋流器的分离效率均可达到95%以上,是较为理想的注气形式.

Gas injected experiments of the hydrocyclone were carried out by using air compressor and Nikuni gas-liquid mixing pump.During the separation process,the injected micro air bubble will capture fine oil droplet to form oil-gas compound body,which will move toward the center of the hydrocyclone under the function of centrifugal force,so as to fulfill the cooperating effect of floatation and hydrocyclonic separation,and to ensure the high efficient separation of oil from water.Experiments indicate that it is feasible to enhance hydrocyclone's separation efficiency by injecting air.Several tested air-injecting means improved the separation effect,although the flow field stability could be destroyed by means of air compressor single point injection,which resulted in less increasing of the efficiency;while other air-injecting means,such as air compressor inlet injection,micro-pore vortex cavity injection,and the injection by using Nikuni gas-liquid mixing pump,are satisfied air-injection means,the efficiency of hydrocyclones can reach as high as 95%.