Dust and mist remover with negative ion generating device

Abstract

The invention relates to a dust and mist remover with a negative ion generating device. The dust and mist remover comprises a unit cylinder, a rotational flow guide vane and the negative ion generating device, closely arranged unit cylinders are arranged in a desulfurization absorption tower, and the unit cylinders are mounted above the uppermost desulfurization slurry spraying layer; each unit cylinder is a cylinder which is installed in the smoke flowing direction and provided with a smooth inner wall and a smooth outer wall, a plurality of stages of rotational flow guide vanes are sequentially arranged in each unit cylinder from bottom to top, and the negative ion generating device is arranged between the rotational flow guide vanes or below the first stage of rotational flow guide vane. The unit cylinders are closely arranged in a rectangular or triangular manner; and the unit cylinders are vertically arranged on a supporting steel grating in the desulfurization absorption tower. The dust and mist remover has the beneficial effects that the rotational flow guide vanes and the negative ion generating device are arranged, various modes such as centrifugal separation and negativeion condensation are effectively combined for flue gas treatment, the dust removal and demisting effects are good, and the concentration of smoke dust and fog drops in flue gas at an outlet of the desulfurizing tower can be effectively reduced.

Description

Technical field [0001] The invention belongs to the technical field of flue gas purification, and in particular relates to a dust and mist eliminator with a negative ion generating device. Background technique [0002] Air pollution is one of the serious environmental problems faced in the process of economic and social development. my country's coal production ranks first in the world, and its proven reserves rank second in the world. Therefore, coal's absolute dominant position in my country's energy structure will not change in the short term. Soot and SO from coal combustion 2 Other pollutants are one of the main causes of air pollution such as smog and acid rain. my country is also paying more and more attention to the treatment of air pollution. Controlling the discharge of pollutants from coal-fired power plants plays a very important role in improving the atmospheric environment. [0003] At present, my country widely uses limestone-gypsum wet flue gas desulfurization te...

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Problems solved by technology

[0003] At present, limestone-gypsum wet flue gas desulfurization technology is widely used in my country to remove SO from flue gas. 2 , the technology is relatively mature and the removal efficiency is high, but the net flue gas after desulfurization contains mist, gypsum particles and soot, which is easy to cause gypsum rain and soot pollution

Conventional demisters can be used to capture liquid droplets entrained in flue gas after desulfurization, but cannot effectively reduce the emission concentration of gypsum particles and smoke; The adaptability is not strong; the wet electrostatic precipitator has high dust removal efficiency and can effectively capture the gypsum particles and dust in the desulfurized flue gas, but the wet electrostatic precipitator has high investment cost, high operating cost, and covers a large area

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