摘要
为了研究综采工作面旋转风幕隔尘机理及其隔尘效率,对旋转风幕隔尘下的综采工作面粉尘浓度分布及其隔尘效率开展了模型实验研究。研究结果表明,(1)在相同工况下,旋转风幕对全尘和呼吸性粉尘的隔尘效率高于普通空气幕,且对呼吸性粉尘的隔尘优势更为明显;(2)出口风速对隔尘效果的影响较大,存在一个最佳的出口风速,在该风速下旋转风幕对全尘和呼吸性粉尘均保持较高的隔尘效率;(3)当出口风速低于最佳风速时,旋转风幕对全尘和呼吸性粉尘的隔尘效率均随着风速的增加而显著提高;当出口风速高于最佳风速时,随着出口风速的增加全尘隔尘效率不断下降,且呼吸性粉尘隔尘效率提升不明显;(4)旋转风幕对于不同粒径的粉尘的隔尘效率存在差异,随着粉尘粒径的增加,旋转风幕的隔尘效率不断下降。
In order to investigate the dust-isolating mechanism and efficiency of rotating air curtain at fully- mechanized work face, the dust distribution and the dust-isolating efficiency under the rotating air curtain was studied by model experiment. The results indicate： （ 1 ） Under the same working conditions, the dust-isolating efficiency of rotating air curtain is higher than the common air curtain, and the superiority of rotating air curtain is more evident in respirable dust. （2） The dust-isolating efficiency is closely related with the outlet air velocity, there is an optimum air velocity at which the rotating air curtain keeps a high dust-isolating efficiency for the total dust and the respirable dust. （3） When the outlet air velocity is below the optimum air velocity, the dust-isola- ting efficiencies of the total dust and the respirable dust raise significantly as the outlet air velocity increases. When the outlet air velocity is above the optimum air velocity, the dust-isolating efficiency of the total dust drops and the dust-isolating efficiency of the respirable dust raises slightly with the increase in the outlet air velocity. （4） As to the different dust particle size, there remains differences in the dust-isolating efficiency. The dust-iso- lating efficiency of rotating air curtain drops continuallv with the increase in the dust particle size.
出处
《环境工程学报》
CAS
CSCD
北大核心
2015年第8期3895-3901,共7页
Chinese Journal of Environmental Engineering
基金
国家自然科学基金资助项目(50974040
51306047)
湖南省自然科学基金青年人才联合培养基金资助项目(13JJB009)
关键词
综采工作面
旋转风幕
粉尘
隔尘效率
模型实验
fully-mechanized work face
rotating air curtain
dust
numerical simulation
mode experiment
