Simultaneous removing device and method of various pollutants by electrocatalytical oxidation combining lime-gypsum method

Abstract

The invention discloses simultaneous removing device and method of various pollutants by an electrocatalytical oxidation combining lime-gypsum method. The device comprises a spraying and cooling device, an electrostatic enhancement reactor, a Venturi device, a double-circulation integrated absorption tower of various pollutants and a wet type electrostatic defroster, wherein after smoke is cooled by the spraying and cooling device, the smoke enters the electrostatic enhancement reactor and is subjected to corona discharge processing in a corona discharge area formed in the electrostatic enhancement reactor; the processed smoke enters the double-circulation integrated absorption tower of various pollutants and is sprayed to remove dust and absorb in the absorption tower; and the purified smoke sequentially enters a corrugated plate defroster and the electrostatic defroster on the upper part of a spraying tower so as to remove aerosol in the smoke. The invention has the advantages that various pollutants can be simultaneously removed, and meanwhile, the pollution of fine granules and the aerosol can be effectively controlled; various pollutants can have higher removal efficiency; and the removal and the absorption of by-products cannot cause secondary pollution to environment.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a device and method for simultaneously removing multiple pollutants by electrocatalytic oxidation combined with a lime-gypsum method. Background technique [0002] At present, different equipment and methods are generally used to control pollutants such as sulfur oxides, nitrogen oxides, polycyclic aromatic hydrocarbons and dioxins in coal-fired flue gas at home and abroad. The main control technologies of sulfur oxides at home and abroad are limestone-gypsum desulfurization technology and semi-dry desulfurization technology. Among them, the limestone-gypsum desulfurization technology has disadvantages such as large investment, high operating costs, and difficult recycling of desulfurization by-products; while the semi-dry desulfurization technology generally has poor adaptability to high-sulfur coal, and is mainly used in units below 300MW. Power pl...

AI Technical Summary

Problems solved by technology

The product after activated carbon adsorption is hazardous solid waste, which may cause secondary pollution

In addition, the cost of disposal of such hazardous solid waste is also quite expensive

[0005] So far, there is no technology that can simultaneously remove the four pollutants of sulfur oxides, nitrogen oxides, polycyclic aromatic hydrocarbons and dioxins in flue gas

After entering the 1990s, people began to gradually realize that the separate treatment of various pollutants not only occupies a large area, but also requires high investment costs.

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