Parameter optimization of dust-collecting and dedusting system with air curtain in heading face
1 Liaoning Technical University, College of Safety Science and Engineering, Fuxin 123000, China
2 Liaoning Technical University, Key Laboratory of Mine Thermodynamic disasters and Control of Ministry of Education, Fuxin 123000, China
3 Taiyuan University of Technology, College of Safety and Emergency Management Engineering, Taiyuan 030600, China
2 Liaoning Technical University, Key Laboratory of Mine Thermodynamic disasters and Control of Ministry of Education, Fuxin 123000, China
3 Taiyuan University of Technology, College of Safety and Emergency Management Engineering, Taiyuan 030600, China
Abstract
Coal dust is a serious hazard for the global coal mining industry. The dust-collecting and dedusting system with an air curtain has been developed to solve the problems of dust control in a mine tunnel. One of the important factors that contribute to the limited performance of a dust-collecting and dedusting system with an air curtain in practice is the design parameters. In this paper, the optimization study was conducted to explore dust-isolating efficiency and find better design parameters. Meanwhile, to overcome the problem of low wind pressure at the jet outlet, a modified structure was used. The result indicated that the wind velocity attenuation amplitude was larger within 1 m from the jet outlet and the wind attenuation amplitude was smaller and faster with 1m~1.5m from the jet outlet. Furthermore, the dust-isolating efficiency is the most obvious when the nozzle exit width is between 10.575 mm and 11.802 mm. The results of this study would play a guiding role on the structural optimization of dust-collecting and dedusting system with air curtain.
Keywords
air curtain; dust control; heading face; wind velocity