Side wall flue gas circulation system of sintering machine

Abstract

The invention provides a sintering machine side wall flue gas circulation system. The sintering machine side wall flue gas circulation system comprises a side wall flue gas circulation cover and a side wall flue gas circulation fan. By means of the characteristic of air leakage of the sintering machine, flue gas circulation, air leakage medium replacement and other measures, the sintering environment of the wall plate area is improved, the flue gas emission of the sintering machine is reduced through the design of flue gas circulation of the side wall of the sintering machine, meanwhile, the oxygen content in flue gas is reduced, and then the flue gas treatment cost is reduced; the method has the advantages of energy conservation, emission reduction and efficiency improvement.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a flue gas circulation system of a side wall of a sintering machine. Background technique [0002] The steel industry is a pillar industry of my country's national economy. my country is also the largest steel producer in the world. In 2018, the output of crude steel was 928 million tons, in 2019, the output of crude steel was 996 million tons. It exceeded 1 billion tons for the first time. [0003] The sintering process is an important process in steel production. During the sintering process, the negative pressure of the system will inevitably lead to a certain degree of air leakage between the material surface gap and the side wall of the trolley, resulting in an increase in the oxygen content of the sintering flue gas. The air leakage in the ducts and other parts accounts for more than 20%. The air entering the system due to the leakage increases the total flue...

AI Technical Summary

Problems solved by technology

[0003] The sintering process is an important process in steel production. The negative pressure of the system during the sintering process will inevitably lead to a certain degree of air leakage between the gaps on the material surface and the side walls of the trolley, resulting in an increase in the oxygen content of the sintering flue gas. Air leakage in ducts and other parts accounts for more than 20%. The air entering the system due to air leakage not only increases the total flue gas volume but also increases the oxygen content of the flue gas. At the same time, the cost of pollution control also increases accordingly.

When the emission standard sets a benchmark oxygen content of 16%, an increase in the oxygen content in the flue gas will inevitably increase the burden on environmental protection facilities

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