Differential wet electric precipitator

Abstract

The invention discloses a differential wet electric precipitator which is applied to the field of atmospheric pollution abatement. Every two adjacent differential polar plate rows are arranged to form a certain angle, so a plurality of mutually wedging sphenoid spaces are formed; each cathode framework is located in one sphenoid space and has a shape matching with that of the sphenoid space, and two working surfaces are respectively parallel to planes of differential polar plate rows at two sides; each sphenoid space forms a large-opening section and a small-opening section at an electric field entry-exit section, wherein the small-opening section is blocked off by using a baffle plate. Compared with a common plate-type electric field wet electric precipitator, the differential wet electric precipitator provided by the invention has the following advantages: under the condition of a same space volume, the utilization rate of space of an electric field is high, a dust collecting area is great, and flue dust collection efficiency is improved; with a special electric field structure, a low flow velocity zone exists in the electric field, and collection efficiency of PM 0.1-10 dust and water spray is high; a continuous and uniform water film is formed on the surfaces of polar plates, so ash deposition on the polar plates never happens, thereby guaranteeing high-efficiency stable operation of equipment.

Description

technical field [0001] The invention relates to the technical field of dust removal equipment used for flue gas treatment, in particular to a differential wet electrostatic precipitator. Background technique [0002] In recent years, environmental pollution and ecological damage have become increasingly serious, and urban smog has also occurred frequently. For this reason, the country's implementation of air pollution emission standards has been continuously improved. At present, the country's smoke and dust emission standards for coal-fired, metallurgical and other industries are controlled at 20~30mg / Nm 3 . In the next few years, the country will further raise the standards for smoke and dust emissions, which will also put forward higher requirements for the performance and reliability of dust removal equipment. [0003] At present, most of the flue gas treatment process layout adopts the process route of pre-dust removal and post-desulfurization. When the original dust ...

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Problems solved by technology

[0006] However, domestic wet electrostatic precipitators started relatively late, and most of the electric field structures of wet electrostatic precipitators currently used still use conventional flat electric fields, but the dust cleaning method is changed to water washing, which cannot effectively utilize the advantages of wet electrostatic precipitators.

Moreover, the wind speed selection of the electric field of large-scale units is relatively high, and the dust removal efficiency of the equipment is not high due to the low space utilization rate of the flat electric field

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