Electric mist precipitator for smoke purification

Abstract

The invention discloses an electric mist precipitator for smoke purification. The electric mist precipitator for smoke purification comprises a shell, anode plate rows and cathode pipe rows, wherein the anode plate rows and the cathode pipe rows are arranged in the shell; in the flowing direction of smoke, the anode plate rows and the cathode pipe rows are arranged in an inclining manner; therefore, when smoke enters the shell, the contact areas between the smoke and the anode plate rows and between the smoke and the cathode pipe rows are large, the needed number of the anode plate rows and the cathode pipe rows is small while it is ensured that the electric mist precipitator has the higher smoke purification rate, and therefore the electric mist precipitator is more compact in structure and smaller in occupied space, and the mounting flexibility is improved; the electric mist precipitator is mainly applied to the top smoke purification process of a wet method desulfurizing tower; through the reasonable model selection, a wet method desulfurizing original mechanical mist precipitating device can be replaced, and the smoke dust removal and mist precipitating process after the wet method desulfurizing can be independently finished.

Description

technical field [0001] The invention relates to the technical field of flue gas purification equipment, in particular to an electric demister used for flue gas purification. Background technique [0002] Limestone / gypsum wet desulfurization has the advantages of high desulfurization efficiency and stable operation, and is widely used in coal-fired thermal power units and other occasions. However, the flue gas after wet desulfurization has the characteristics of high water content and low temperature. At the same time, the flue gas There are also pollutants such as gypsum particles, acid droplets, and dust particles. When the flue gas is directly discharged, it will not only lead to excessive emission, but also cause additional corrosion to downstream flue, chimney and other equipment. Therefore, after wet desulfurization Flue gas needs to be purified before being discharged. [0003] At present, the way to purify the flue gas after wet desulfurization is usually to add an e...

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Problems solved by technology

[0005] However, in this electric demister, since the anode plate and the cathode tube are parallel to the flow direction of the flue gas, the contact area between the flue gas and the two is small, and because the flow direction of the flue gas is perpendicular to the direction of the electric field force , therefore, it is not conducive to the movement of charged droplets and dust particles to the anode plate

Based on this, in order to ensure that the demister has a high flue gas purification rate, it is necessary to ensure that the anode plate and the cathode tube have a sufficient height, resulting in a large volume of the electric demister, which is not conducive to the rational use of space

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