Abstract：Traditional dust removal equipment is difficult to remove sub-micron dust effectively while electrostatic coagulation is an effective way to clean sub-micron dust.By designing a test-bed and using fly-ash as experimental dirt,performance of charge and deposition was studied.Result shows a non-liner rise of charge-mass ratio with charging voltage ascending,an increase of coagulation-deposition efficiency with wind speed increasing,concentration debasing and charging voltage rising,and the highest coagulation-deposition efficiency at +25 kV/-23 kV under asymmetrical bipolar charging voltage.The distribution of the diameter of the dust after charging shows that,in the entry,the dust diameter of 10 μm is increased markedly.
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