预混式双流体静电喷嘴喷雾特性及荷电性能

为实现高湿环境下脱硫塔内复杂烟气的高效除尘,设计了一种预混式双流体静电雾化喷嘴,并对其喷雾特性及荷电性能进行了试验研究。试验测量了喷雾粒径、锥角和荷质比等参数,通过量纲分析,得到了该喷嘴粒径分布与雷诺数Re的数学模型。试验结果表明:喷雾粒径随气液比(GLR)的增加呈指数减小,当气液比小于0.1时,喷雾粒径随气液比增加迅速减小,当气液比大于0.1时,喷雾粒径减小幅度趋于平缓;喷雾粒径随雷诺数的增加呈线性减小。喷雾锥角随着气液比增加呈先增大后减小的趋势,当气液比为0.1时喷雾锥角最大。气液比增加,喷雾荷质比增加,荷电效果逐渐增强。荷电电压的升高使得喷雾的单分散性提高,弥散空间逐渐增加。

Spray Characteristics and Charge Performance of Premixed Air-blast Electrostatic Nozzle

In order to achieve high efficiency dust removal in flue gas desulfurization tower in high humidity environment,a premixed air-blast electrostatic nozzle was designed,and its spray characteristics and charging performance were tested.Parameters such as spray particle diameter,cone angle and charge to mass ratio were measured.The mathematical model of particle size distribution and Re of the nozzle was obtained through dimensional analysis.The test results show that the spray particle size decreases exponentially with the increase of gas-liquid ratio(GLR).When the gas-liquid ratio is less than 0.1,the spray particle size decreases rapidly with the increases of the gas-liquid ratio.When the gas-liquid ratio is greater than 0.1,the spray particle size decreases to a gentle extent.The spray particle size decreases linearly with the increase of Re.The spray cone angle increases first and then decreases with the increase of gas-liquid ratio.When the gas-liquid ratio is 0.1,the spray cone angle is the largest.The charge to mass ratio increases with the increase of gas-liquid ratio,and the charging effect increases.With the increase of the charging voltage,the monodispersity of the spray increases and the dispersion space increases.