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With the salience of air pollution problems such as PM2.5, the removal of micro particle dust has increasingly become a widespread issue to address. In this study, we put forward the technology of charged water mist in vibrating fiber grid. Five types of effect of catching dust, such as gravitational settlement, inertial collision, interception, diffusion, and electrostatic attraction in a single fiber, were theoretically analyzed. The mechanism of vibration fiber grid, whose resonant film-forming effect was analyzed on spray charging water, was also studied. The infinitesimal analysis method was used for calculating the efficiency of catching dust in the vibrating fiber grid. The fiber grating arrangement was determined by performing lots of experiments of dust collection efficiency and resistance loss in longitude of fiber grating, latitude, and interlacing fiber grating. The obtained results showed that not only the dust removal in longitude of fiber grating, which was easy to use, was stable and efficient, but also the resistance loss was relatively low and the natural dust drop did not need frequent ash removal. Therefore, the charged spray in longitude of vibration fiber grating has certain application value in dust removal technology. The theoretical and experimental results also show that the technology of dust removal by charged spray in vibration fiber grid has a high purification efficiency for micro particles and simple structure and thus would have certain valuable application in dust removal technology in future.

The traditional dust removal technology is difficult to meet the strict requirements of environmental protection, so it is of practical significance and research value to study how to purify fine dust in workshop. Fine dust can be suspended in the atmosphere, while reducing the air quality. Excessive inhalation of dust may result in disease. So it should be paid close attention to dust control. The water mist charging process has experienced three stages: induction charge, corona charge transition, and corona charge. When the discharge distance is 80 mm, the charge-mass ratio of droplet and the current of water mist are most affected by corona voltage. The significant impact analysis of orthogonal experiment is studied. The result of the orthogonal experiment is analyzed by the variance method. It is noted that the inlet wind speed has the highest influence, and the discharge distance has a least influence on the dust removal efficiency. The discharge distance is 80 mm, and the voltage working band is suitable for the normal voltage regulation of the electrostatic precipitator. The condensation efficiency of charged droplets on dust is beneficial to reduce the negative effect of excessive wind speed on wet vibrating string grid and to improve the effective handling volume of dust collector. The charge-mass ratio of water mist is improved effectively, and the dust removal efficiency is increased in the vibrating string filter with charged water mist. Theoretical analysis and experimental studies showed that the vibrating string filter with charged water mist is as a new composite efficient dust removal technology that can effectively deal with the purification of fine dust particles in the gas stream, especially in respiratory dust removal.