Wet desulfurization system with electrostatic humidifier and anode demister

Abstract

The invention provides a wet desulfurization system with an electrostatic humidifier and an anode demister, which relates to a purification apparatus in a thermal power plant, particularly an apparatus for lowering dust content in spray-type desulfurization absorption tower wet desulfurization fume. The wet desulfurization system comprises an absorption tower, wherein a spray layer and a demister are arranged in the tower; a humidification sprayer is arranged 0.3-1.0m behind the demister; the humidification sprayer is connected with a high-voltage electrostatic power supply; a last stage demister is arranged in a flue which is 4-10m behind the humidification sprayer; a flush sprayer for flushing the last stage demister is arranged in front of the last stage demister; an electrostatic demister is arranged behind the last stage demister and connected with the high-voltage electrostatic power supply. The wet desulfurization system effectively lowers the smoke dust discharge amount of the thermal power plant chimney, has the advantages of low energy consumption, lower investment, convenient maintenance of equipment, long service life, short construction cycle, extremely low equipment failure rate, simple operation regulation and high equipment safety, and can effectively collect fine particles, escape ammonia, heavy metal, organic pollutants and the like.

Description

technical field [0001] The invention relates to a purification device of a thermal power plant, in particular to a device for reducing the dust content of the wet desulfurization flue gas of a spray type desulfurization absorption tower. Background technique [0002] The desulfurization absorption tower uses physical and chemical methods to remove sulfur dioxide (SO 2 ) devices or structures. The main components of pulverized coal boiler dust: silicon dioxide, aluminum oxide, ferric oxide, calcium oxide, magnesium oxide, unburned carbon, etc. The soot contained in the flue gas after the desulfurization of the desulfurization spray absorption tower of the thermal power plant contains part of the dust of coal combustion, and most of the solids are the slurry components in the desulfurization absorption tower. [0003] Wet desulfurization is one of many desulfurization methods. Wet desulfurization uses water as the absorbent carrier in the process of absorption and reaction, ...

AI Technical Summary

Problems solved by technology

Although the wet electrostatic precipitator can solve the problem of high dust content in the flue gas of the desulfurization system, the investment cost is extremely high. High, "wet electrostatic precipitator" investment reaches 120-150 yuan / kwh

And the construction period is long. It takes more than 40 days to complete the electric bag dust removal, and more than 80 days to complete the wet electrostatic dust removal. The operation and maintenance costs are also high.

There is basically no space for the implementation of electrostatic precipitator in the completed power plants

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