超声干雾抑尘机理及其技术参数优化研究  

Research on mechanism and parameters optimization of ultrasonic atomization technique for dust removal

作　　者：李刚[1,2,3] 吴超[1] 

机构地区：[1]中南大学资源与安全工程学院,湖南长沙410083 [2]中钢集团马鞍山矿山研究院有限公司安全与环保工程研究所,安徽马鞍山243000 [3]金属矿山安全与健康国家重点实验室,安徽马鞍山243000

出　　处：《中国安全科学学报》2015年第3期108-113,共6页China Safety Science Journal

基　　金：国家重点基础研究发展计划"973"计划项目(2012CB724207);马鞍山市科技计划项目(JN-2014-02);中钢集团马鞍山矿山研究院有限公司院控技术创新项目(2014YKJSCX-03)

摘　　要：为改善超声波雾化效果,提高超声干雾的除尘效率,根据空气动力学、"云"物理学和斯蒂芬流输运原理,研究超声干雾抑尘机理。采用自行设计的雾流参数测定试验装置,研究压缩空气的压力(气压)、水流量等指标对超声雾化器雾化效果的影响,得出超声雾化器合理的供气压力和供水流量。选取烧结磁铁矿粉尘为呼吸性粉尘样品,在超声雾化器最佳运行条件下对其除尘效率进行测定。研究结果表明:微细水雾有利于呼吸性粉尘的捕集。超声雾化器的最佳运行条件为:气压0.35 MPa,水流量30 L/h。在此运行条件下,其对呼吸性粉尘的平均除尘效率为98.3%,最高可达98.6%。In order to improve the ultrasonic atomization effect and effectively improve effect of ultrasonic atomization technology in respirable dust removal,the technology mechanism of dust collection by the ultrasound atomization was researched according to the aerodynamics principle,the cloud principle and of physics and the Stephen flow transport theory. By using a self-designed experimental device for measuring fog flow parameters,effects of pressure of compressed air（ pressure） and volume of water on atomization result were examined and reasonable compressed air pressure and volume of water supply of ultrasonic atomizer were obtained. Sintered magnetite ore dust was taken as respirable dust samples. Dust removal efficiency of ultrasonic atomizer was measured under it＇s best operating conditions. The results show that fine water mist produced by the atomizer is conducive to trapping respirable dust and the optimum compressed air pressure is 0. 35 MPa and optimum volume of water is 30 L / h. The average removal efficiency of respirable dust is 98. 3%,and the maximum is up to 98. 6%.

关 键 词：超声干雾抑尘 呼吸性粉尘 机理分析 雾化效果 除尘效率 

分 类 号：X964[环境科学与工程—安全科学]