旋流器内超重力聚结过程的试验研究

Experimental Study on the Coalesence in Higee Field

通过试验 ,定量地研究了旋流器———一种静态超重力器的入口雷诺数、溢流分率、溢流口直径、尾管长度、分散液滴浓度和粘度对超重力聚结过程的影响。结果显示 ,在正常的入口直径 (本试验条件中为 3.5mm和 4 .8mm)下 ,入口直径及入口流量对聚结的影响主要可归结为入口雷诺数的影响 ,且存在最佳入口雷诺数值 6 0 0 0 0 ;溢流分率的减小、溢流口的增大、尾管长度的加长都会改善聚结效果 ;分散液滴浓度对聚结的影响虽不很明显 ,但分散液滴浓度的增加对聚结也有一定的促进作用 ;

Experimental work has been conducted to examine quantitatively the coalesence in higee field(ie.in cylonic vortex),including the effect on the coalesence of inlet Reynolds number, overflow rate,the diameter of overflow outlet,the length of underflow dock, the concentration of droplets and the viscosity of dispersed phase.Results show that the effect of inlet diameter and feed flowrate could be attributed to the effect of inlet Reynolds number for normal size inlets,with the optmum inlet Reynolds number of 60000.The coalesence could be improved by using large overflow outlets,small overflow rate and long underflow docks.The coalesence could be improved by reducing the viscosity of dispersed phase and raising the concentration of droplets though the effect of droplet concentration appeared to be a bit weak.