【作者】 茆平； 冯曙艳； 杨毅； 张新鑫； 董经玲； 陈守文； 王正萍；

【Author】 Ping Mao;Shuyan Feng;Yi Yang;Xinxin Zhang;JIngling Dong;Shouwen Chen;Zhengping Wang;School of Environmental and Biological Engineering,Nanjing University of Science and Technology;Lianyungang Institute of Nanjing University of Science and Technology;

【机构】 南京理工大学环境与生物工程学院； 南京理工大学连云港研究院；

【摘要】 为掌握雾化液滴对提高湿法采样器对纳米气溶胶采集效率的影响作用,考察了不同喷雾流量和雾化室尺寸对采集效率的影响,并通过Fluent软件仿真模拟不同尺寸雾化室内雾化液滴的运动状况,了解液滴对温法采集的影响机理。研究结果表明,雾化室中的液滴作用以润湿包覆为主,而储液腔中的液滴主要以碰撞凝并实现对气溶胶粒子的捕获,润湿包覆对纳米TiO₂气溶胶粒子的采集效果大于碰撞凝并的捕获效果。当雾化室和储液腔的喷雾流量均控制为40ml/min时,湿法采样器的采集效率可达到最高（92%）。仿真和实验结论均表明,雾化室的最佳尺寸是高度170mm、内径60mm。更多还原

【Abstract】 In order to further know well the function and influence of atomized droplets for collection efficiency in wet sampler.The effects of different spray flow rates and spray tower sizes on collection efficiency were investigated by self-made wet sampler,and the movement of atomized droplets in spray tower with different dimensions were simulated via the Fluent software.The results indicated that the chief function of atomized droplets in spray tower was wetting coating,and the mainly function of atomized droplets in fluid reservoir was collection;however,the former contribution is greater than the latter.The collection efficiency of wet sampler could be as high as 92% with both flow rates of atomized droplets were 40 ml/min.Simulation and experimental results showed that the best of dimension of the spray tower is height 170 mm and inner diameter of 60 mm.更多还原