Simulation and Experimental Study on Powder Packing by Electrostatic Ion Air Removal
The electrostatic elimination effect of ionic air on the falling process of powder was studied,and the effect of electrostatic ion air on the filling and packing of powder was explored.Firstly,the 3d structure of pow-der packing was established by solid works.Then,based on the gas-solid coupling mechanism,Fluent and DPM discrete phase model were used to simulate the packing process of external ionic air powder,and the capture of different particle sizes by different wind speeds was analyzed.Finally,the electrostatic elimination test platform of spiral conveying powder was built.Based on the simulation results,the electrostatic ion fan was applied to the powder filling and packing station,and the electrostatic elimination effect in the falling process of powder was studied experimentally,and compared with the simulation results.The simulation results show that the powder flow flows out along the inner side of the bag and presents a symmetrical distribution.The addition of ionic wind is beneficial to the bagging of the powder.When the wind speed is in the range,the capture rate of the powder particle size is higher than 30 μm.The experimental results showed that the average charge/mass ratio of wheat flour with no ionic air and 0.6 m/s ionic air was 0.45 nc/g and 0.33 nc/g,respectively,when the spiral speed was 90 r/min and the vertical falling pipe was blowing.The average charge/mass ratio of wheat flour with no ionic air and 0.6 m/s ionic air was 0.45 nc/g and 0.34 nc/g,respectively,when the air was blowing over the outlet.The experimental results are consistent with the simulation results.The ionic wind has a significant effect on the charge when the powder is filled and packed.The electrostatic elimination efficiency of the vertical falling pipe blowing ionic wind is up to 27% ,and the electrostatic elimination efficiency of the outlet blowing ionic wind is up to 24% .
electrostatic ion windpowder packingthe charge-mass ratioscrew conveyingelectrostatic e-liminating
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