Flue gas pollutant removal system

Abstract

The invention discloses a flue gas pollutant removal system. The flue gas pollutant removal system comprises a dust removal mechanism, a spraying mechanism, a purification mechanism and a discharge tower. According to the flue gas pollutant removal system, a scraping assembly is arranged in a dust removal box, two scraping plates are used for treating solid pollutants on the surfaces of a coarse filter screen and a fine filter screen correspondingly, and the solid pollutants on the surfaces of the coarse filter screen and the fine filter screen fall into the dust removal box, thus the coarse filter screen and the fine filter screen can be prevented from being blocked by solid pollutants in flue gas, normal filtration of the solid pollutants in the flue gas is ensured, and the filtration effect of the solid pollutants in the flue gas is effectively improved. By arranging a circulation assembly in a spraying tower, taking sodium alkali as a desulphurizing agent and lime as a regeneration agent and adding lime into a circulating water system, calcium sulfite and sodium alkali are generated, the calcium sulfite precipitates and the sodium alkali are recycled along with desulfurization circulating water, so that the problem of easy scaling of a lime method is effectively solved, the main consumption is low-cost lime, and the operation cost is low.

Description

technical field [0001] The invention relates to the technical field of flue gas treatment, in particular to a flue gas pollutant removal system. Background technique [0002] Smoke is a mixture of gas and smoke and is the main cause of air pollution in residential areas. The composition of the flue gas is very complex. The gas includes water vapor, sulfur dioxide, nitrogen, oxygen, carbon monoxide, carbon dioxide, hydrocarbons, and nitrogen oxides. The smoke includes fuel ash, coal particles, oil droplets, and pyrolysis products. The particulate matter emitted by the fixed source of the boiler includes not only the filterable particulate matter that directly exists in the flue gas as liquid or solid particles, but also includes the gaseous state at the temperature of the flue gas, which is discharged into the atmosphere, diluted in the air, and condensed into a liquid state after cooling down for a few seconds. Or solid, and condensable particles generated by agglomeration,...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a flue gas pollutant removal system, which solves the problem that at present, coal-fired power plants can remove dust, NO x , SO 2 , but the removal efficiency of sulfide is low, and the operating cost is high, and the by-products of desulfurization are likely to cause secondary pollution to the environment

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