Method for recovery treatment of waste-and-old lithium battery electrolyte and treatment of electrolyte wastewater

Abstract

The invention discloses a method for recovery treatment of a waste-and-old lithium battery electrolyte and treatment of electrolyte wastewater. Three treatment units are employed for treatment. Firstly, the waste-and-old electrolyte is treated. Then, waste gas resulting from the reaction of the electrolyte is pumped into the waste water for absorption, so that the waste gas can be removed during a waste water treatment process; the lithium battery waste water is treated by a Fenton agent through oxidation to obtain improved biodegradability of the waste water; and reaction precipitates are removed through flocculent sedimentation and the obtained water is treated through combination of A2/O and MBR membrane separation. Finally, the outlet water goes through a RO reverse osmosis unit to ensure the quality of the outlet water. Combination technology of active carbon powder adsorption and ultra-filtration is employed to remove organic pollutants of the concentrated water resulting from the RO unit, so that the water after treatment can meet the requirements of RO high-quality reuse water. According to the invention, imperfection of an existing technical method of waste-and-old lithium battery recovery and treatment is overcome, and quantitative reduction, harmlessness, and reutilization of waste water treatment of the waste-and-old electrolyte are realized.

Description

technical field [0001] The invention relates to various processes of recycling and harmless treatment of lithium battery electrolyte and electrolyte wastewater, and more specifically relates to a treatment method for recycling and treating waste lithium battery electrolyte and electrolyte wastewater. Background technique [0002] Since the commercialization of lithium batteries around 1990, due to the advantages of small size, light weight, fast charging speed, wide temperature range and long cycle life, they are widely used in cameras, mobile phones, notebook computers, portable measuring instruments, etc. , it is also the preferred high-energy power source for future electric vehicles. At present, the positive electrode material of lithium battery is composed of pure aluminum foil (thickness 0.01mm) as current collector and black positive electrode active material coating (thickness about 0.08mm). The black coating contains about 88% of the positive electrode material lit...

AI Technical Summary

Problems solved by technology

[0004] The technical purpose of the present invention is to overcome the deficiencies of the prior art, overcome the incompleteness and incomplete treatment of the existing recycling technology, and provide a treatment method for reclaiming and treating waste lithium battery electrolyte and electrolyte wastewater

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