An oblique airflow circulation device for electrostatic precipitator

Abstract

The invention discloses an oblique airflow circulation device for an electrostatic precipitator, which comprises inlet horns and outlet horns arranged at both ends of the electrostatic precipitator box, and an airflow distribution plate perpendicular to the direction of airflow movement is arranged in the inlet horn of the electrostatic precipitator , a vertical groove plate is arranged in the outlet horn of the electrostatic precipitator, a return pipe is arranged at the bottom of the inlet horn of the electrostatic precipitator, and a circulation fan is arranged on the return pipe; by adjusting the flue gas return ratio, the corresponding return ratio meets the electric The deflection coefficient of the inclined air flow profile of the dust collector is less than 0.15m / s. The flue gas reflux circulation system of the present invention realizes the forced reflux of part of the flue gas and increases the residence time of the dust-laden airflow in the electric field. Potential of dust removal, improve dust removal efficiency.

Description

technical field [0001] The invention belongs to the field of industrial electric dust removal, and in particular relates to an oblique airflow distribution and airflow circulation device in an electric dust collector. Background technique [0002] Airflow distribution is one of the important factors affecting the dust removal efficiency of electrostatic precipitators. Because the airflow distribution can be regulated by appropriate guide devices, distribution devices, and forced air blowing or drafting, it has the advantages of small workload, economical and easy, and is not subject to The advantages of site constraints are often used emphatically in the design and transformation of electrostatic precipitators to ensure better dust removal effects. Researches at home and abroad have shown that at the entrance of the electric field of the electrostatic precipitator, the air flow adopts a distribution method with a lower flow velocity at the upper part and a higher flow veloci...

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Problems solved by technology

At present, the oblique airflow distribution of electrostatic precipitators is realized by various deflectors and airflow distribution plates. Regardless of the deflector or airflow distribution plate, the effect of single use is not ideal.

In addition, Yu Li, Li Guodong and others disclosed an oblique airflow control electrostatic precipitator (invention patent number: 200720026751.6), which uses the top suction of the final electric field and the bottom blowing mode of the imported horn to forcibly change the airflow profile, thereby forming an oblique airflow. However, the disadvantage of this method is obvious. The imported blast increases the processing gas volume of the electrostatic precipitator, and the normal temperature air blown in makes the flue gas temperature in the electrostatic precipitator drop. Once the flue gas temperature is lower than the acid dew point, it will aggravate the equipment and Corrosion of the pipes, outlet ventilation will cause part of the purified flue gas to be directly discharged into the atmosphere, and this part of the flue gas has not been further treated, which will still cause the escape of dust and other harmful pollutants

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