湿式密集纤维栅对矿山粉尘的过滤效率  

Filtration efficiency of wet-type intensive fiber grid on mine dust

作　　者：陈喜山[1] 张宇琪[1] 姚小清[1] 

机构地区：[1]青岛理工大学汽车与交通学院,青岛266520

出　　处：《环境工程学报》2017年第5期2871-2877,共7页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(51274127)

摘　　要：金属矿山粉尘净化一直是深井空气环境治理的技术难题,为解决单层纤维栅并列插板结构体积大、孔隙率高等问题,在毛细管润湿效应产生水膜的净化理论基础上,建立了湿式密集纤维栅净化机制的物理模型,利用等效假设推出了湿式密集纤维栅的过滤净化效率式。采用正交实验分析了各因素对密集纤维栅净化效率的影响。根据分级净化效率的实验结果对理论效率公式进行了量纲一的修正,应用湿式密集栅纤维层过滤实验系统进行粉尘净化实验,实验结果表明:湿式密集纤维栅在实验最优组合情况下对粒径小于5μm的呼吸性粉尘净化效率可达92.36%,具有良好的实际应用效果。Purification of metal mine dust always involves technical problems concerning control of the deep- mine atmospheric environment. To solve these problems, including the large volume and high porosity of the sin- gle-layer fiber grid parallel-structured board,a physical model of the purification mechanism with a wet-type in- tensive fiber grid was established,and a filtration and purification efficiency formula was derived by using an e- quivalence assumption on the theoretical basis of water-film purification generated by a capillary wettability effect. An orthogonal experiment was adopted to analyze the impacts of different factors on the purification effi- ciency of the intensive fiber grid and to derive a nondimensional revised formula for purification efficiency. Ac- cording to the graded purification efficiency,the theoretical formula was nondimensionally revised. A dust purifi- cation experiment was performed by applying the filtration experimental system for the fiber layer of the wet-type intensive grid. The experimental results suggested that, under optimal experimental conditions, the wet-type inten- sive fiber grid achieved an efficiency of 92.36% for purifying respirable dust with grain diameters below 5 μm and that favorable outcomes were achieved for practical application.

关 键 词：湿式密集纤维栅 过滤净化效率 正交实验 参数修正 

分 类 号：X513[环境科学与工程—环境工程]