Closed channel type electric dust remover

Abstract

The invention provides a closed channel type electric dust remover which comprises at least one dust removal box body, multiple stages of electric field units are arranged in the dust removal box body in the flue gas flowing direction, a plurality of rows of anode plate sets are arranged in each electric field unit, and an electric field channel is formed between every two adjacent rows of anode plate sets. The outlet of the electric field channel of the upper-stage electric field unit is communicated with the inlet of the electric field channel of the lower-stage electric field unit, a cathode line group is arranged in each electric field channel, and a channel closing mechanism is arranged at one end, facing the flue gas inlet, of each electric field channel and comprises a blocking assembly arranged at the inlet of each electric field channel; and the driving mechanism is used for controlling the plugging assembly to close or open the inlet of the electric field channel. The closed channel type electric dust remover can reduce reentrainment of dust generated by rapping, reduce the concentration of dust at an outlet and improve the dust removal efficiency.

Description

【Technical field】 [0001] The invention relates to the technical field of flue gas pollutant treatment, in particular to a closed-channel electrostatic precipitator. 【Background technique】 [0002] The secondary dust is the main technical bottleneck for the electrostatic precipitator to break through the existing dust removal efficiency. Due to the scouring effect of the flue gas flow, the dust is easily lifted by the airflow and enters the airflow during the falling process, resulting in Dust removal efficiency is reduced. In order to solve the above problems, the existing technologies for industrial application mainly adopt mobile electrode electrostatic precipitator and wet electrostatic precipitator, but they have the disadvantages of poor operation stability and high cost respectively. [0003] Under the current global goal of "carbon peaking and carbon neutrality", clean energy has begun to develop on a large scale, and coal-fired units have gradually shifted from a do...

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Problems solved by technology

[0002] The secondary dust is the main technical bottleneck for the electrostatic precipitator to break through the existing dust removal efficiency. Due to the scouring effect of the flue gas flow, the dust is easily lifted by the airflow and enters the airflow during the falling process, resulting in Reduced dust collection efficiency

[0005] 1. The secondary dust is obvious, and there is no economical and efficient technology to solve the problem of rapping the secondary dust, and it cannot be stably lower than 10mg / m 3 ultra-low outlet dust concentration

[0006] 2. Under low load, the flow rate is low, there is a serious problem of dust accumulation, and the energy consumption rate is high

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