Converter gas electrostatic precipitator and control method thereof

Abstract

The invention discloses a converter gas electrostatic precipitator which comprises a cylindrical shell, and a first electric field, a second electric field, a third electric field and a fourth electric field located in the shell. An explosion venting valve communicating with an explosion venting device is arranged on the shell; a spraying device is arranged in front of the third electric field; the third electric field and the fourth electric field are wet type polar plates; and the spraying device is used for forming a layer of water film on each of the polar plates of the third electric field and the fourth electric field, so that dust attached onto the water films flows into a water collecting tank through the actions of a water flow and a gravitational force, and no reentrainment of dust is caused. According to the converter gas electrostatic precipitator provided by the invention, the dust content of a gas at an outlet of the electrostatic precipitator can be reduced, meanwhile, the water spraying amount is controlled to achieve the aim of gas cooling, and the gas can be fed into a gas chamber without the need to be further cooled.

Description

technical field [0001] The invention relates to the technical field of flue gas dust removal, in particular to a converter gas electrostatic precipitator and a control method thereof. Background technique [0002] The converter produces converter gas during the steelmaking process, and its main components are CO, CO 2 , O 2 , N 2 and Ar, etc., and FeO, Fe carried by the gas 2 o 3 , CaO, SiO 2 and other dust, the total dust content is 80~150g / Nm 3 It must be dedusted before it can be used. Converting one ton of steel can recover 80~120Nm of converter gas containing 60% CO 3 , is an important secondary energy source for iron and steel plants. Compared with other dust removal technologies, converter gas dry dust removal technology has obvious advantages in terms of economy and environmental protection: first, the dust removal efficiency is high; second, the system resistance loss is small, which reduces power consumption; third, there is no pollution in the dry dust remo...

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Problems solved by technology

[0003] At present, the converter gas dry dust removal system uses a dry electrostatic precipitator (usually four electric fields connected in series) as the fine dust collector. In the actual operation process, due to the periodicity of converter gas smelting, the gas composition and dust content fluctuate greatly. Large, especially in the case of frequent electric field discharge breakdown and the dust removal process of the third and fourth electric fields, the dust content of the gas at the outlet of the electrostatic precipitator is likely to exceed the standard

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