In this paper,the mechanics model for particles purged by compressed air on trough collecting mirror is constructed to estimate the efficiency of dust removal by compressed air.The dust removal process under different particle properties and working parameters are simulated by coupling wind field and dust particles.Working parameters are optimized by orthogonal test method.The results show that for the same type of particles,the smaller the particle size is,the more difficult to be removed from mirror surface.The dust removal efficiency of single ball,double-ball and three-ball are 97.33%,94.99%and 93.5%,respectively.The dust removal efficiency is highest when the inlet flow rate of blade nozzle is above 70m/s.When the angle of the air knife nozzle is 45° and 60°,no obvious difference of dust removal efficiency is found.The efficiency of vertical dust removal is the worst.The higher the height of the blade nozzle,the more serious the decrease of dust removal efficiency.When the inclination angle of mirror is 5°,10°,and 15°,the overall dust removal efficiency is 81.52%,91.25%and 97.33%.The optimal working parameters obtained throughorthogonal test are the inlet flow rate of the air knife nozzle 70m/s,the angle of nozzle 45°,the height of nozzle 10mm and the inclination angle of the condenser arrangement 15°.
关键词
压缩空气除尘/积尘颗粒/理论模型/数值模拟/正交试验
Key words
compressed air dust removal/dust particles/theoretical model/numerical simulation/orthogonal test
维普
万方数据