关键词: 雾化电晕放电, 除尘效率, 高比电阻

Abstract: With the rapid development of economy and the increasingly stringent emission standards, the removal of dust has been a research hotspot. A new type of grounding atomization corona discharge precipitator is designed. During the discharge process, the liquid on the surface of the wire electrode is atomized while the particles are charged, so as to effectively remove the dust. During the experiment, the velocity of air flow is set to 1 m/s and 3 m/s, the flow rate and direction of air flow are changed, and the V⁃A characteristics of atomized negative corona discharge are studied. Secondly, the influence of gas velocity on dust removal efficiency in grounding atomization corona discharge precipitator with 25 mL/min flow rate of the liquid covered on the surface of the wire electrode is studied. Finally, in order to study the dust removal ability for high specific resistance dust by grounding electrode atomization corona discharge technology, cement dust with specific resistance of 1.2×1012 Ω·m is used as high specific resistance dust in reverse gas flow with gas velocity of 1 m/s. The results show that the dust removal efficiency decreases with the increase of gas velocity. The discharge current with the reverse gas flow is larger than that of the forward gas flow when the gas velocity is increased. When the flow rate of the liquid covered on the surface of the wire electrode is 25 mL/min, the current of the negative grounding atomization corona discharge is the largest.The optimum reaction conditions of the grounding atomization corona discharge precipitator are as follows: the flow rate of the liquid covered on the surface of the wire electrode is 25 mL/min when the reverse gas flow rate is 1 m/s. Compared with the traditional dry corona discharge reactor, the grounding atomization corona discharge precipitator has higher dust removal efficiency for high specific resistance dust.

Key words: Atomization corona discharge, Dust removal efficiency, High specific resistance