Converter flue gas dry-type purification and waste heat recovery system and method

Abstract

The invention provides a converter flue gas dry-type purification and waste heat recovery system and method.The converter flue gas dry-type purification and waste heat recovery system comprises a converter, an evaporation cooling flue, a magnetic agglomeration settling chamber, a composite filter cartridge filtering device, a waste heat recovery device, a three-way switching valve, a coal gas recovery system and a diffusion chimney, wherein the outlet of the converter is communicated with the inlet of the evaporation cooling flue, the outlet end of the evaporative cooling flue is communicated with the inlet end of the magnetic agglomeration settling chamber, the outlet end of the magnetic agglomeration settling chamber is communicated with the inlet end of the composite filter cartridge filtering device, the outlet end of the composite filter cartridge filtering device is communicated with the inlet end of the waste heat recovery device, and the outlet end of the waste heat recovery device is communicated with the inlet end of the three-way switching valve. Two outlet ends of the three-way switching valve are respectively communicated with a coal gas recovery system and a diffusion chimney, and the magnetic agglomeration settling chamber is used for absorbing waste heat and agglomerating, growing and settling iron and oxides thereof in converter flue gas. Dust can be effectively removed while waste heat of converter flue gas is fully absorbed.

Description

technical field [0001] The invention relates to the technical field of converter flue gas treatment, in particular to a converter flue gas dry purification and waste heat recovery system and method. Background technique [0002] Converter steelmaking is currently the most important steelmaking method, accounting for more than 85% of the domestic steelmaking process. The process is a complex high-temperature oxidation reaction dominated by carbon and oxygen reactions, which will generate a large amount of high-temperature dust-laden flue gas. [0003] The converter will produce a large amount of flue gas, the main components of the flue gas are CO (about 66%), CO2 (about 16%) and N2 (about 17%), and a small amount of O2 and Ar. Because converter flue gas contains a large amount of CO, converter flue gas is also called converter gas. The initial temperature of converter gas is about 1600°C, which contains a large amount of dust from steelmaking, and the dust content is about 8...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a converter flue gas dry purification and waste heat recovery system and method to solve the problem that the existing converter flue gas dry purification and waste heat recovery system and method cannot effectively absorb the waste heat of converter flue gas dust removal problem

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