Flue gas purification system for roasting furnace of prebaked anode used for aluminum electrolysis

Abstract

The invention relates to a flue gas purification system for a roasting furnace of a prebaked anode used for aluminum electrolysis. The system mainly includes, in a successively connected manner in series, an SNCR denitration and dust and tar removal apparatus, a sphere heat accumulation oxidizing furnace, an S-shaped flue desulfuration reactor, and a bag-type dust remover. Flue gas is driven by adraught fan and is fed into the SNCR denitration and dust and tar removal apparatus, then successively passes through the sphere heat accumulation oxidizing furnace, the S-shaped flue desulfuration reactor and the bag-type dust remover, and finally is exhausted via a chimney when the flue gas reaches treatment standard.

Description

technical field [0001] The invention relates to a flue gas treatment system, in particular to a flue gas treatment system of a prebaked anode roaster for aluminum electrolysis, which belongs to the field of flue gas purification. Background technique [0002] my country is the world's largest producer of electrolytic aluminum. Since 2001, its aluminum production capacity has been ranked first in the world. In 2017, my country's prebaked anode production capacity reached 24.48 million tons, and the output reached 19.7 million tons. Prebaked anodes are the main consumption products of electrolytic aluminum production, and about 450kg of anodes are needed per ton of aluminum consumption. Anode roasting is an important process in the production process of carbon products. Under the condition of being isolated from the air, according to the requirements of different types of products, indirect heating is carried out at a certain heating rate to the highest roasting temperature. ...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems existing in the existing prebaked anode roasting flue gas treatment process that dust and tar cannot be effectively removed, simultaneous desulfurization and denitrification are impossible, desulfurization and denitrification efficiency is low, and secondary pollution is caused to the environment, the invention provides an aluminum electrolysis Prebaked anode roaster flue gas purification syste

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