Experimental research on V-I characteristic of a novel cavity atomizing corona discharge device

In order to seek a new control method which can control the dust, SO2, NOx and other pollutants comprehensively, a novel atomizing corona discharge device without external dynamic force was invented. The voltage-current (V-I) characteristics in different electrode structures were studied. In the cavity-wire type discharge structure, the voltage-current characteristics of de-ionized water, tap water and saturated solution of Ca(OH)2 were compared and analyzed. The results showed that: the atomizing effect of cavity-wire type discharge structure was better than that of cavity-plate under the same electrode diameter and voltage. A better atomizing effect could be obtained when the curvature radius of the cavity atomizing electrode was reduced. Active ions in solution had damaging effect on hydrogen bond among water molecules, which is in favour of solution atomization. This work will provide theoretical basis and experimental supports for a new field that the electrostatic and the wet flue gas desulphurization (WFGD) are combined together at the same time.