旋流芯式喷嘴喷雾降尘数值模拟与现场应用
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摘要
以燕子山矿8204工作面采用旋流芯式喷嘴喷雾除尘为对象,研究了压力水在喷嘴内部的流动状态和喷嘴喷雾扩散规律及工作面喷雾压力、流量对喷雾降尘效率的影响。旋流芯体是否开槽口会直接影响喷嘴的喷雾效果。旋流芯无槽口的喷嘴喷雾扩散角大、雾化效果好,但是喷雾射程短,对水质要求高。旋流芯开槽口的喷嘴喷雾射程大、抗污染性更强,但是喷雾扩散角较小。喷嘴的口径越大,喷雾扩散角越大,建立了喷雾喷嘴口径与喷嘴喷雾扩散角度的关系式。现场实践表明,使用设计后的喷嘴喷雾降尘平均降尘率达68.95%～75%,提高了降尘效率。
Taking a swirling-cored nozzle for spraying for dust suppression in Yanzishan Mine 8204 working face as the object,the flow state of the pressure water in the nozzle and the spray diffusion law of the nozzle and the effects of the spray pressure and the flow rate on the spray dust fall efficiency were studied. Whether the swirling core is slotted or not will directly affect the spray effect of the nozzle. The swirling-cored nozzle without opening had large spray diffusion angle and good atomization effect,but the spray range was short and the demand for water quality was high. The swirling-cored nozzle with opening had larger spray range and stronger pollution resistance, but the spray diffusion angle was smaller. The larger the diameter of the nozzle is, the larger the spray diffusion angle is. The relationship between the spray nozzle diameter and the spray diffusion angle of the nozzle was established. The practice in-situ shows that the average dust fall rate of the designed spray nozzle is 68.95% to 75%, and the dust suppression efficiency is improved.
Taking a swirling-cored nozzle for spraying for dust suppression in Yanzishan Mine 8204 working face as the object,the flow state of the pressure water in the nozzle and the spray diffusion law of the nozzle and the effects of the spray pressure and the flow rate on the spray dust fall efficiency were studied. Whether the swirling core is slotted or not will directly affect the spray effect of the nozzle. The swirling-cored nozzle without opening had large spray diffusion angle and good atomization effect,but the spray range was short and the demand for water quality was high. The swirling-cored nozzle with opening had larger spray range and stronger pollution resistance, but the spray diffusion angle was smaller. The larger the diameter of the nozzle is, the larger the spray diffusion angle is. The relationship between the spray nozzle diameter and the spray diffusion angle of the nozzle was established. The practice in-situ shows that the average dust fall rate of the designed spray nozzle is 68.95% to 75%, and the dust suppression efficiency is improved.
引文
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[4]刘洋,杨红,高志远,等.旋芯雾化喷嘴流场特性的数值模拟[J].装备制造技术,2015(1):131-132.
[5]王鹏飞,刘荣华,汤梦,等.煤矿井下喷雾降尘影响因素的试验研究[J].安全与环境学报,2015,15(6):62.
[6]武通海.高效喷雾降尘技术在掘进工作面的应用研究[D].太原:太原理工大学,2002.
[7]刘丽娜.离心式喷嘴流场特性的实验和模拟研究[D].大连:大连理工大学,2011.
[8]戚厚保,赵继云,徐展,等.喷雾除尘雾化喷嘴流场仿真与分析[J].煤矿机械,2011,32(4):92-94.
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