Device and method for efficiently purifying smoke of coal-fired power plant

Abstract

The invention provides a device for efficiently purifying smoke of a coal-fired power plant. The device is arranged between a boiler and a chimney of the coal-fired power plant and used for purifying smoke of the coal-fired power plant. The device comprises a coal economizer, an air pre-heater and an electrostatic dust collector, and further comprises a denitration reactor, a desulfurizing tower, a chemical scrubber and / or a demister. The boiler, the coal economizer, the denitration reactor, the air pre-heater, the electrostatic dust collector, the desulfurizing tower and the chimney are sequentially communicated, and the chemical scrubber and / or the demister are / is arranged between the desulfurizing tower and the chimney. When smoke generated by the coal-fired power plant flows through the chemical scrubber, the smoke reacts with chemical reagents in the chemical scrubber in a mixed mode to be scrubbed. The invention further discloses a method for efficiently purifying smoke of a coal-fired power plant. The device for purifying smoke of the coal-fired power plant is reasonable in design, is specially used for processing acid storm formed by SOx, NOx, particulate matter and acid drops in exhausted smoke and gypsum rain, and solves the corrosion problem of the chimney of the coal-fired power plant.

Description

technical field [0001] The invention relates to the technical field of exhaust gas purification, in particular to an efficient purification device and method for flue gas of a coal-fired power plant. Background technique [0002] With the increasingly prominent problems of environmental pollution in our country, especially the haze weather has brought increasingly serious impact on people's life and health, it is necessary to further reduce the discharge of pollutants and improve discharge standards. Therefore, future coal-fired power plants will have to meet emission standards for gas-fired power generation. [0003] The flue gas produced by coal-fired power plants will be discharged to the atmosphere after treatment, but the existing technology is backward, and the NO in the flue gas produced by coal-fired power plants cannot x , SO x The complete removal of sulfuric acid rain and gypsum rain formed by particles, acid droplets, etc. makes the chimneys of coal-fired power...

AI Technical Summary

Problems solved by technology

[0003] The flue gas produced by coal-fired power plants will be discharged to the atmosphere after treatment, but the existing technology is backward, and the NO in the flue gas produced by coal-fired power plants cannot x , SO x The complete removal of sulfuric acid rain and gypsum rain formed by particles, acid droplets, etc. makes the chimneys of coal-fired power plants severely corroded, and cannot meet the relevant standards, making air pollution more and more serious

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