摘要
喷雾降尘是矿井下主要的除尘方式之一,深入了解喷雾液滴与粉尘的碰撞规律,对实际喷雾降尘效率的提高具有指导意义。从微观角度数值模拟了不同粒径和不同韦伯数条件下液滴与粉尘碰撞的动态过程。结果表明,韦伯数越大,液滴扩散速率变化越大。当韦伯数大于15.4时,粉尘能够迅速被完全包裹。当液滴尺寸大于12μm时,液滴可以完全包裹粉尘颗粒。为了验证模拟的可靠性,宏观角度上通过2个实验得出结论:当喷雾压力为7 MPa时,优质参数区间内的液滴所占比例最高,在优化后喷雾参数下呼吸性粉尘沉降效率可达85.6%。
Spray dust reduction is one of the main dust removal methods underground mine,an in-depth understanding of the collision law between spray droplets and dust,which has guiding significance for the improvement of actual spray dust reduction efficiency.The dynamic process of the collision between droplets and dust under the conditions of different particle sizes and different Weber numbers was simulated numerically from a microscopic point of view.The results show that the larger the Weber number,the larger the change of droplet diffusion rate.When the Weber number is larger than 15.4,the dust can be quickly and completely encapsulated.When the droplet size is larger than 12μm,the droplet can completely encapsulated the dust particles.In order to verify the reliability of the simulation,it is concluded in two experiments from a macroscopic point of view that the proportion of droplets in the high-quality parameter interval is the highest when the spray pressure is 7 MPa,and the respiratory dust settling efficiency under the optimized spray parameters can reach 85.6%.
作者
李浩铭
陈祥
彭慧天
许长炜
刘飞
Li Haoming;Chen Xiang;Peng Huitian;Xu Changwei;Liu Fei(College of Safety and Environmental Engineering,Shandong University of Science and Technology,Qingdao 266590,China;Shandong Xinjulong Energy Co.,Ltd.,Heze 274000,China)
出处
《煤矿机械》
2025年第3期93-97,共5页
Coal Mine Machinery
关键词
喷雾降尘
液滴碰撞
粉尘包裹
呼吸性粉尘
spray dust reduction
droplet collision
dust encapsulation
respiratory dust
作者简介
李浩铭(1998-),山东临沂人,硕士,研究方向:职业安全健康与防护,电子信箱:lihaoming0709@163.com;通信作者:陈祥,电子信箱:15253075872@139.com.
