Flexible rotary anode wet electrostatic precipitator

Abstract

The invention provides a wet type electric dust remover with a flexible rotary anode, and relates to the wet type electric dust remover which is used for a fire coal thermal power generating unit and is arranged between an outlet and a chimney of a desulfurization tower. The wet type electric dust remover comprises a shell, an inner shell, an inlet smoke box, an airflow uniform distribution plate, an outlet smoke box, a liquid collection groove, a flexible rotary anode system, a cathode system, a high-frequency power supply, a spraying system, a washing system and a DCS (Distributed Control System), wherein the flexible rotary anode is a carbon fiber and polyester filament yarn blended fabric, has good conductivity and does not depend on the conductivity of a dust-containing water film; the spraying system and the washing system guarantee the continuity and the uniformity of the surface water film when the flexible rotary anode works; dust and scales are not deposited; no channeling and no dry spots are formed; NaOH does not need to be added into spraying water and washing water; the system is simple and the operation cost is low; the wet type electric dust remover is easy to modularize and be large-size; the technology can be used for designing and manufacturing the wet type electric dust remover with the flexible rotary anode, which is matched with a 1000MW-grade coal-fired boiler; the construction cost is reduced.

Description

[0001] Technical field: [0002] The invention relates to a flexible rotary anode wet electrostatic precipitator, which relates to a wet electric precipitator used by a coal-fired thermal power unit and arranged between the outlet of a desulfurization tower and a chimney. [0003] Background technique: [0004] The use of wet electrostatic precipitators is an effective means for thermal power units to achieve ultra-low emissions. [0005] The wet electrostatic precipitator is arranged between the outlet of the desulfurization tower and the chimney, which can effectively remove smoke dust (including PM10PM2.5 fine particles), gypsum droplets, SO 3 and toxic heavy metals. [0006] The wet electrostatic precipitators used in thermal power plants in the prior art can be divided into two categories: rigid plates and flexible electrodes; both rigid plates and flexible electrodes are fixed electrodes. Rigid plates are usually made of austenitic stainless steel / glass fiber reinforced...

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to provide a flexible rotary anode wet electrostatic precipitator, which solves the problem of machining deviation and surface tension on the surface of the rigid anode in the prior art, and the alkali washing liquid is easy to form channels and dry spots on the rigid wall surface, and the water film is evenly distributed. The characteristics are relatively poor, and it is easy to form ash; to solve the problem that the conductivity of the flexible electrode in the prior art is realized by the conductivity of the surface ash-containing water film. At a high gas velocity, the surface ash-containing water film will be impacted by the airflow However, its integrity is affected, and when the ash-containing water film process is too long, its conductivity and the self-cleaning ability of the flexible electrode are also affected, and problems such as dust accumulation and scaling occur; it is difficult to enlarge the size of the flexible electrode wet electrostatic precipitator in the prior art

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