Experimental investigation on atomization and collecting efficiency ofwind-spray dust controller and its parameters optimization
来源期刊：中南大学学报(英文版)2015年第11期
论文作者：KOU Bao-fu LIU Qiu-zu CAO Shi-chen HU Xiao-he LI Yan-feng WANG Yi-ran ZHAO Bo-hui
文章页码：4213 - 4218
Key words：wind-spray dust collector; atomization efficiency; collecting efficiency
Abstract: In order to enhance the atomization efficiency of atomizer, a new type of wind-spray dust controller combining the rotary-atomization and colliding broken of droplets was designed by the method of opening the water circulation within the blades. The experiment test for dust controller was conducted by adjusting the following parameters: rotating speed, diversion hole-exit diameter, and colliding tooth angle. Results show that the atomization efficiency increases firstly then decreases with them. And the optimal parameters are obtained with rotating speed 1500-2200 r/min, diversion hole-exit diameter 2-2.5 mm and colliding tooth angle 30°-40°, and under these conditions the corresponding atomization efficiencytops to 95%. Then, the atomization situation under the optimal parameters is held from the aspect of simulation internal flow field and the results of droplet size (30-80 μm) are got, which indicates that the conclusion on the optimized parameters of dust controller is reasonable. The collecting efficiencies of different dust concentrations are determined, ranging from 85% to 98.4%, which shows that the designed dust controller can obtain a good atomizing effect and achieve well dustfall efficiency for the wetting dust control of coal mine.
KOU Bao-fu(寇保福)1, LIU Qiu-zu(刘邱祖)1, CAO Shi-chen(曹世宸)2, HU Xiao-he(胡晓禾)1, LI Yan-feng(李延峰)1, WANG Yi-ran(王毅然)1, ZHAO Bo-hui(赵波慧)1
(1. College of Mechanical Engineering, Taiyuan University of Technology, Taiyuan 030024, China;
2. School of Advanced Engineer, University of Science and Technology Beijing, Beijing 100083, China)
Abstract:In order to enhance the atomization efficiency of atomizer, a new type of wind-spray dust controller combining the rotary-atomization and colliding broken of droplets was designed by the method of opening the water circulation within the blades. The experiment test for dust controller was conducted by adjusting the following parameters: rotating speed, diversion hole-exit diameter, and colliding tooth angle. Results show that the atomization efficiency increases firstly then decreases with them. And the optimal parameters are obtained with rotating speed 1500-2200 r/min, diversion hole-exit diameter 2-2.5 mm and colliding tooth angle 30°-40°, and under these conditions the corresponding atomization efficiencytops to 95%. Then, the atomization situation under the optimal parameters is held from the aspect of simulation internal flow field and the results of droplet size (30-80 μm) are got, which indicates that the conclusion on the optimized parameters of dust controller is reasonable. The collecting efficiencies of different dust concentrations are determined, ranging from 85% to 98.4%, which shows that the designed dust controller can obtain a good atomizing effect and achieve well dustfall efficiency for the wetting dust control of coal mine.
Key words:wind-spray dust collector; atomization efficiency; collecting efficiency
