College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, China.
State Key Laboratory of Mining Disaster Prevention and Control Co-Founded By Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, 266590, China.
Environ Sci Pollut Res Int. 2022 Dec;29(59):88540-88556. doi: 10.1007/s11356-022-21394-5. Epub 2022 Jul 14.
In this study, experimental studies on atomization process and dust reduction performance of four swirl nozzles with different inlet/outlet diameter ratio (D) were performed. The results of the atomization process study of the nozzle show that with the increase of D, the droplet breakup range of the spray field is gradually increasing, but the droplet breakup intensity of the spray field is gradually decreasing. At D = 3.33 and 3.63, droplet breakup occurs mainly in the range of 0-4 mm in the strong turbulent region. At D = 3.75, droplet breakup occurs mainly in the range of 0-2 mm in the strong turbulent region. At D = 3.96, droplet breakup occurs mainly in the range of 0-1 mm in the strong turbulent region. Droplet breakup in the spray field at D = 3.33 and D = 3.67 was better than that at D = 3.75 and D = 3.96. From the dust reduction experimental results, the dust reduction efficiency increases and then decreases with the increase of D. The dust reduction efficiency is highest among the four nozzles at D = 3.67. Based on the dust reduction curves of four different D of nozzles, it is predicted that the optimal dust reduction condition will be achieved at D of 3.60, which provides a reference for the design and optimization of nozzles.
在这项研究中，对四种不同进出口直径比（D）的旋流喷嘴的雾化过程和降尘性能进行了实验研究。喷嘴雾化过程研究结果表明，随着 D 的增加，喷雾场的液滴破碎范围逐渐增大，但喷雾场的液滴破碎强度逐渐减小。在 D=3.33 和 3.63 时，液滴主要在强湍流区 0-4mm 范围内破碎。在 D=3.75 时，液滴主要在强湍流区 0-2mm 范围内破碎。在 D=3.96 时，液滴主要在强湍流区 0-1mm 范围内破碎。D=3.33 和 D=3.67 时的喷雾场液滴破碎情况好于 D=3.75 和 D=3.96 时的喷雾场。从降尘实验结果来看，降尘效率随 D 的增大先增大后减小。在这四个喷嘴中，D=3.67 的降尘效率最高。基于四个不同 D 的喷嘴的降尘曲线，预测在 D 为 3.60 时将达到最佳降尘条件，为喷嘴的设计和优化提供了参考。
