Double-zone multistage electrostatic dust collector with charged cold anode and application method thereof

Abstract

The invention belongs to the technical field of electrostatic dust collectors, and especially relates to a double-zone multistage electrostatic dust collector with a charged cold anode and an application method thereof. According to the double-zone multistage electrostatic dust collector with a charged cold anode of the invention, a dust collecting zone comprises a plate-plate channel formed by an anode plate and a cathode plate disposed face to face; a charged zone comprises an anode tube grid row and a cathode wire grid row; one end of a cold liquid tube of the anode tube grid row is connected with a liquid feeding collector, and the other end is connected with a liquid return collector; each liquid feeding collector is connected with a liquid feeding header; the liquid return collector is connected with a liquid return header; the liquid feeding header is connected with a liquid feeding header tube disposed outside a housing; the liquid return header is connected with a liquid return header tube disposed outside the housing. When the dust collector of the invention operates, cold liquid flowing in the anode grid tubes cools the grid tube surfaces, and thus realizes temperature decrease of a dust layer deposited on the grid tube surfaces, which effectively reduces the specific resistance value of the dust layer, and eliminates the adverse effect that a reverse electric field or back corona caused by the dust layer with a high specific resistance value deposited on the anode surface can charge the dust.

Description

technical field [0001] The invention belongs to the technical field of electrostatic precipitators, in particular to a dual-zone multi-stage electrostatic precipitator charged with cold poles and a method for using the same. Background technique [0002] The traditional single-zone electrostatic precipitator purifies high specific resistance dust (ρ≥5×10 11 Ω·cm) The fact that the dust removal effect of the flue gas is not good is recognized as a major defect of the electrostatic precipitator. The reason for the poor dust removal effect of the high specific resistance dust is: The specific resistance of the dust layer is relatively large, and when the ion current and the dust charging current pass through the dust layer, the conduction and release of the charge is not as easy as the normal specific resistance dust layer, resulting in more accumulated charges in the dust layer, forming a stronger direction of the dust collection electric field The opposite reverse electric f...

AI Technical Summary

Problems solved by technology

[0004] In view of the shortcomings of the traditional single-zone electrostatic precipitator and the common dual-zone electrostatic precipitator, which are not effective in removing dust with high specific resistance, the present invention provides a cold-electrode charged dual-zone multi-stage electrostatic precipitator and its use method. It is an effective way to improve the dust removal effect of high specific resistance dust

Images