Waste lithium battery cracking waste gas purification system

Abstract

The invention discloses a waste gas purification treatment system which is used for recovering waste gas generated by crushing and cracking waste lithium batteries. The lithium battery cracking wastegas purification system comprises a 2-stage incinerator, an air-cooled heat exchanger, a bag dust remover, an induced draft fan, a 2-stage washing tower, a colored smoke plume treatment device, and anactivated carbon adsorption device, and waste gas finally enters a chimney for reaching the standard discharge; waste gas generated by the recovered waste lithium batteries subjected to freezing, crushing and pyrolysis of a rotary kiln are collectively referred to as pyrolysis waste gas, similarly hereinafter; and after the pyrolysis waste gas is subjected to the high-temperature incineration technology, the pyrolysis waste gas is subjected to multi-stage purification. The system realizes dry purification so as to facilitate the recovery of precious rare metals (such as positive electrode materials, aluminum powder and the like) in the lithium batteries, and meanwhile, the system realizes the standard discharge and achieves the environment impact assessment requirement.

Description

technical field [0001] The invention relates to the field of disposal of discarded or scrapped lithium batteries, in particular to a waste gas purification system for pyrolysis of discarded lithium batteries. Background technique [0002] Abandoned or scrapped lithium batteries are hazardous wastes, which contain a large amount of non-renewable metal resources such as cobalt, lithium, copper, aluminum, etc. The metal and organic and inorganic substances in the lithium battery will cause serious pollution to the atmosphere, water and soil, and even endanger people's health. [0003] Discarded lithium batteries belong to the application field of solid waste recycling. It is only in the research and development stage in China, and there is currently a wet treatment process. However, this process is not only unfavorable to the recovery of precious metals, but also produces waste water and waste gas that are difficult to deal with, making it difficult to meet environmental prot...

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Problems solved by technology

However, this process is not only unfavorable to the recovery of precious metals, but also produces waste water and waste gas that are difficult to deal with, making it difficult to meet environmental protection requirements.

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