摘要
针对抓斗卸煤时产生的粉尘污染问题,当前主要的抑尘方法水雾抑尘、通风除尘都有其缺点和局限性。将气幕技术应用于阻隔抓斗卸煤产生的粉尘是气幕技术与粉尘阻隔的创新性结合,但气幕发生器结构对形成气幕均匀性、偏斜性好坏的研究尚不成熟;文中通过计算流体动力学方法(CFD)对气幕发生器结构进行数值模拟研究,得出保证气幕发生器在均匀性、偏斜性良好情况下的结构参数为气柱直径70 mm,导流叶片间距20 mm;同时对气幕射流阻隔粉尘效果进行CFD流体仿真,得出不同气幕射流风速下空气流场速度分布和粉尘运动轨迹情况,结果表明:当气幕射流速度为6 m/s时,气幕能对抓斗卸煤产生的粉尘进行有效阻隔,为抓斗卸煤粉尘治理提供参考价值。
As for the dust pollution caused by grab bucket coal unloading,commonly used dust suppression methods,including water mist dust suppression and ventilation dust removal,all have their shortcomings and limitations.The application of air curtain technology in blocking the dust generated by coal unloading of grab bucket reflects the innovative combination of air curtain technology and dust blocking,but the research on the influence of air curtain generator structure on the uniformity and deflection of air curtain is not enough.In this paper,the structure of air curtain generator was numerically simulated by CFD computational fluid dynamics method,and the structural parameters to ensure the uniformity and deflection of air curtain generator were obtained,including the diameter of air column of 70 mm and the spacing of guide vanes of 20 mm.The effect of air curtain jet on blocking dust was simulated by CFD fluid,and the velocity distribution of air flow field and dust movement trajectory under different air curtain jet wind speeds were unveiled.The results show that when the jet velocity of the air curtain is 6 m/s,the air curtain can effectively block the dust generated by the grab coal unloading,which can serve as a reference for the dust control in coal unloading of grab bucket.
作者
高吉祥
孟文俊
苏东波
张汉中
Gao Jixiang;Meng Wenjun;Su Dongbo;Zhang Hanzhong
出处
《起重运输机械》
2024年第19期19-27,共9页
Hoisting and Conveying Machinery
基金
国家级基金“复合激励下有限边界域内散状物料高效定向流动机理研究”(52075356)。
关键词
抓斗
计算流体力学
气幕
粉尘
阻隔
grab bucket
computational fluid mechanics
air curtain
dust
isolation
