Droplet and dust suppression characteristics of water mist based on ionic wind charging
A charged water mist dust suppression system was established based on ionic wind charging and a domestically designed convergent-divergent nozzle.A laser particle size analyzer and a charge-to-mass ratio measurement device were used to investigate the effects of charged voltage and atomization pressure on the droplet Sauter mean diameter and dust suppression characteristics by chan-ging the charged and spraying system parameters.The results show that the overall Sauter mean diame-ter dst of the charged droplets decreases with the increase of charging voltage and atomization pressure,while slightly increases under the low charging voltage because of the aggregation of droplets.The charge-to-mass ratio of the droplets increases with the increase of charging voltage and atomization pressure,and the rate of increase slows down with the increase of charging voltage.The overall dust suppression efficiency of the charged water mist dust suppression system generally increases with the in-crease of charging voltage and atomization pressure.However,when the atomization pressure is too high,the increase of the charging voltage will cause the dst to be too small,resulting in decreasing dust suppression efficiency because of the increase of evaporation.The graded dust suppression efficiency shows a U-shaped distribution with the decrease of particle size,and the inflection point shifts forward with the increase of charging voltage.The optimal dust suppression efficiency is achieved at a charging voltage of 20 kV and an atomization pressure of 0.6 MPa.
charged water mistSauter mean diametercharge-to-mass ratiodust suppressionionic wind
万方数据
维普
