an electric dust collector

Abstract

The invention discloses an electrical precipitator, comprising a dedusting main body with an electric field polar plate arranged inside the dedusting main body, and an inlet loudspeaker and an outlet loudspeaker which are arranged on two ends of the dedusting main body, wherein the dedusting main body comprises a plurality of dedusting sections in which cross sectional area nearby the outlet loudspeaker end is larger than that nearby the inlet loudspeaker. After smoke enters the electrical precipitator through the inlet speaklouder, large dust particle with strong charge is collected by the front dedusting sections with small cross sectional area under actions of natural sedimentation and electric field force; the residual fine dust is collected by the back dedusting sections with large cross sectional area. As the back dedusting sections have large cross sectional area, the flow velocity of the dusty gas declines so as to increase residence time, charged time and time of motion under the electric field force of the fine dust in the dedusting sections, so that the dust is easy to charge or deposit on the polar plate; therefore, the dedusting efficiency is improved, the dust emission is reduced and the excessive emission is avoided.

Description

technical field [0001] The invention relates to the technical field of dust removal, in particular to an electric dust collector. Background technique [0002] Electrostatic precipitators can be divided into circular electrostatic precipitators (used in gas dust removal fields such as blast furnaces and converters) and square electrostatic precipitators (that is, traditional electrostatic precipitators that are widely known) according to the different cross-sectional shapes. Traditional electrostatic precipitators can be designed with different electric fields, and the length of each electric field can be the same or different, but the cross-sectional shape of each electric field is the same. After the flue gas enters the electrostatic precipitator from the inlet horn, it passes through each electric field at the same flow rate, and then is discharged through the outlet horn. [0003] Because the dust particle size and dust concentration in the flue gas are distributed diff...

AI Technical Summary

Problems solved by technology

Due to the short residence time of the fine dust in the rear electric field of the traditional electrostatic precipitator, it is difficult for the dust to be fully charged and adsorbed, or it is too late to deposit on the wall and is taken out of the rear electric field by the airflow, resulting in the problem of excessive emission

[0004] In addition, due to the relatively high wind speed, the secondary flying of dust during rapping is caused, which exacerbates the problem of excessive dust emission

Images