Wet electric precipitator

Abstract

The invention provides a wet electric precipitator, comprising a tubular shell, an anode plate, a cathode wire, an anode plate flushing nozzle and a cathode wire flushing nozzle, wherein the anode plate comprises two groups of anode plate bodies which are symmetrically distributed; the symmetry plane is an axial plane of the tubular shell passing through the center axis; the two groups of anode plate bodies respectively comprise a plurality of parallel anode plate bodies; the corresponding anode plate bodies in the two groups of anode plate bodies are intersected on the symmetry plane, or extension surfaces of the corresponding anode plate bodies are intersected on the symmetry plane; an inclination angle alpha is formed between the anode plate bodies and the symmetry plane; alpha is smaller than 90 degrees and greater than 0 degrees; the cathode wire and the corresponding intervals of the anode plate bodies are arranged in parallel, and are symmetrically arranged along the symmetry plane simultaneously; the cathode wire is transversely arranged and horizontally extends towards the tubular shell from the position of the symmetry plane. By adopting the wet electric precipitator, a flue gas blind zone can be effectively reduced, the same flue gas velocity and apparent velocity of the flue gas are designed in an electric field zone, and abundant flue gas residence time in the electric field zone is ensured, so that the dust removal efficiency achieves the design level, and the effective dust collection area of a polar plate is effectively increased.

Description

technical field [0001] The invention relates to the field of flue gas dust removal and purification, in particular to a wet electrostatic precipitator. Background technique [0002] With the implementation of environmental protection emission standards in the domestic thermal power industry, the standards for the emission concentration of dust (fine particulate matter) have been further improved. After the flue gas is desulfurized, further advanced treatment is required to reduce the dust content and soluble solid dissolved salts in the flue gas, so as to meet the new emission requirements and achieve emission standards. [0003] As a high-efficiency dust removal technology, wet electrostatic precipitator technology has been increasingly widely used in the field of flue gas dust removal. Compared with the dry electrostatic precipitator technology, the wet electrostatic precipitator optimizes the cleaning method, cancels the traditional vibration cleaning device, and forms a...

AI Technical Summary

Problems solved by technology

However, since the cross-section of the absorption tower perpendicular to its central axis is a circular structure, the fit between the electric field of the square structure and the absorption tower with a circular cross-section is low, resulting in an electric field blind area around the electric field. The advanced treatment of dusty particles has obvious inhibitory effect

At present, the commonly used method to control the blind area is to block the blind area of ​​the electric field, but after the blockage, the cross section of the flue gas circulation will be reduced, resulting in an increase in the flow rate of the flue gas in the electric field area (generally, the growth rate can reach 8% to 10%)

As the flue gas velocity in the electric field increases, the residence time of the flue gas will be shortened, which is not conducive to the removal of dust in the flue gas

At the same time, due to the square structure of the anode plate, it greatly limits the specific area of ​​the dust collecting electrode of the electric field. In order to achieve a higher specific dust collecting electrode area in the prior art, it is necessary to expand the diameter of the electric field section, but this increases the Absorb the load of the tower, increasing the difficulty of construction

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