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通过雾化粒度,射流速度和负压值性能试验测试负压吸气式雾化装置的关键参数,并通过因素水平分析确定了最优的参数取值范围,最后进行降尘试验测试。试验结果表明:增大射流压力能明显提高液滴雾化效果;雾滴D_(50)随喷嘴直径的增大呈先减小后增加的抛物线变化规律;雾滴速度随喷嘴伸出量的增加表现出先增加然后稳定减小的趋势。通过正交分析确定喷嘴直径3.5 mm,喷嘴伸出量3 mm为最佳参数;通过负压值测试分析确定射流水压3 MPa为最佳参数。通过和轴流喷嘴降尘效果对比得到射流吸气式混合雾化装置的雾粒粒径降低了54.73%,对全尘的控尘效率提高了20.78%,尤其是呼吸性粉尘控尘效率提高了40.24%。
The key parameters of the negative pressure aspirating atomizer were tested by atomization particle size, jet velocity and negative pressure performance test, and the optimal parameter range was determined by factor level analysis. Finally, the dust test was carried out. The experimental results show that increasing the jet pressure can obviously improve the atomization effect of the droplets. The droplet D_ (50) first decreases and then increases with the increase of the nozzle diameter. The droplet velocity increases with the increase of the jet nozzle Showed a trend of first increasing and then decreasing steadily. Through the orthogonal analysis, the nozzle diameter of 3.5 mm and the nozzle extension of 3 mm were determined as the best parameters. The optimum parameters of jet pressure 3 MPa were determined by the negative pressure test. By comparing with the dust-reducing effect of the axial jet nozzle, the fog particle size of the jet aspirating hybrid atomizer is reduced by 54.73%, the dust control efficiency of the whole dust is increased by 20.78%, especially the dust dust control efficiency is increased by 40.24 %.