Method and device applied to coal-fired power plant for removing white smoke from chimney

Abstract

The invention discloses a method and device applied to a coal-fired power plant for removing white smoke from a chimney. The method comprises the following steps: (S01) reducing the moisture content of a saturated wet flue gas through reducing the temperature of the saturated wet flue gas at an outlet of a desulfurizing tower; (S02) removing aerosol particles and liquid water droplets from the saturated flue gas of which the moisture content is reduced in the step (S01) through a baffle channel-type flue demister; and (S03) heating the flue gas from which the aerosol particles and the liquid water droplets are removed to be higher than the temperature of a wet air saturation curve through a heating section heat exchanger, thereby removing the white smoke phenomenon. The device applied to the coal-fired power plant for removing the white smoke from the chimney is capable of removing the white smoke generated from the coal-fired power plant in low-temperature and high-humidity environments, effectively removing sulfur dioxide in the flue gas, removing the aerosol particles in the flue gas, improving the dust removal efficiency and reducing the energy consumption.

Description

technical field [0001] The invention relates to a method and a device for eliminating white smoke in a chimney applied to a coal-fired power plant, and belongs to the technical field of dust removal and desulfurization. Background technique [0002] my country is a big coal consumption country, and the amount of sulfur dioxide and dust emitted by coal burning ranks first in the world. The resulting air pollution problem is becoming more and more serious. Controlling sulfur dioxide and dust emissions is a major event in my country's environmental protection work. The sulfur dioxide emissions from thermal power plants account for a very high proportion of the total sulfur dioxide emissions. According to statistics, the sulfur dioxide emissions from coal-fired industrial boilers account for about 40% of the national sulfur dioxide emissions. Therefore, dust removal and desulfurization of flue gas from thermal power generation is an important measure to control sulfur dioxide an...

AI Technical Summary

Problems solved by technology

However, the current dust removal and desulfurization technology in thermal power plants has problems such as low dust removal efficiency, high water consumption in desulfurization towers, and low boiler efficiency.

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