Sintering and pelletizing flue gas multi-pollutant synergistic purification system on basis of bag type dust removal

Abstract

The invention discloses a sintering and pelletizing flue gas multi-pollutant synergistic purification system on the basis of bag type dust removal. The sintering and pelletizing flue gas multi-pollutant synergistic purification system comprises a sintering machine or pelletizing device (1), an acid mist eliminator (2), a bag type dust remover (3), a denitration reactor (4), an induced draft fan (5), a wet desulfurization device (6), a chimney (7) and an ash circulating system. The acid mist eliminator (2) is arranged at an inlet of the bag type dust remover (3); the acid mist eliminator (2) comprises an impact type disperser (201), a shell (202) and a partition plate (203); powder in ash hoppers of the bag type dust remover (3) can be conveyed to an inlet of the acid mist eliminator (2) bythe ash circulating system by the aid of dust-free hot flue gas circulation at the rear of the induced draft fan (5), can be dispersed by the impact type disperser (201) and can be uniformly mixed with flue gas at the inlet, and acid mist in the flue gas can be eliminated under the adsorption effect of the powder. The sintering and pelletizing flue gas multi-pollutant synergistic purification system has the advantages that electrostatic dust removers are replaced with the bag type dust remover of the sintering and pelletizing flue gas multi-pollutant synergistic purification system, accordingly, the flue gas dust capturing efficiency can be improved, and standardized discharge requirements can be met; the problems of blocking, scaling and the like of follow-up desulfurization and denitration equipment can be solved, and corrosion and bag sticking of the bag type dust remover can be prevented by the acid mist eliminator and the ash circulating system.

Description

technical field [0001] The invention relates to a collaborative purification process of flue gas dust, sulfur dioxide, nitrogen oxides and other pollutants of a sintering machine or a pelletizing device, belonging to the field of environmental protection and air pollution control; in particular, it relates to a bag-type dedusting-based sintering pellet flue gas multi-pollution Material collaborative purification system. Background technique [0002] Sintering machine or pelletizing device flue gas is a kind of flue gas produced during the high temperature sintering molding process of sintering ore. In addition to a large amount of dust, the flue gas also contains sulfur dioxide, nitrogen oxides, etc. The characteristics of the flue gas are: high and low temperature, large fluctuations, high humidity of the flue gas, easy to produce acid condensation, and strong corrosion. Therefore, electrostatic dust removal is used for flue gas dust removal at home and abroad, and bag dus...

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a sintering machine (pellet) based on bag-type dedusting for the problems of low electrostatic dust removal efficiency of flue gas in existing sintering machines or pelletizing devices, substandard emissions, blockage and fouling of subsequent desulfurization and denitrification equipment, etc. Flue gas multi-pollutant collaborative purification system

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