Comprehensive recycling method for alcohol-bearing waste liquid in production process of lithium batteries

A technology of production process and recycling method, which is applied in the direction of chemical instruments and methods, filtration treatment, water/sewage multi-stage treatment, etc., can solve the problems of high energy consumption, large safety hazards, waste of ethanol resources, etc., and achieve recycling of resources, Stable operation and accurate results

Inactive Publication Date: 2018-12-18
青海中润惠德气体能源科技有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The stockpiling of a large amount of alcohol-containing waste liquid not only causes waste of methanol and ethanol resources, but also poses a large safety hazard, which is not conducive to the safe production of enterprises. Therefore, the recycling and reuse of alcohol-containing waste liquid has become the current lithium-ion battery industry. one of the problems
[0003] The traditional recovery process of alcohol-containing waste liquid mainly adopts distillation and rectification process. This method requires special equipment and requires large plant area, large investment, complex process, high temperature and large energy consumption in the process of treatment. , there are certain safety hazards in the separation process
Although this method can realize the recovery of alcohol-containing waste liquid, it fails to recycle the metal ions contained in the waste liquid

Method used

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  • Comprehensive recycling method for alcohol-bearing waste liquid in production process of lithium batteries

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Experimental program
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Effect test

Embodiment 1

[0032] Alcohol-containing waste liquid produced in the production process of lithium batteries, the content of lithium ions is 5×10 -4 g / L, the content of cobalt ion is 3×10 -3 g / L, the content of nickel ions is 2×10 -3g / L. The alcohol-containing waste liquid passes through a multi-media filter and a precision filter to remove insoluble impurities in the alcohol-containing waste liquid. After the solid-liquid separation of the alcohol-containing waste liquid, the turbidity of the alcohol-containing waste liquid is 0.5mg / L, and the temperature of the waste liquid is 5°C.

[0033] The alcohol-containing waste liquid after solid-liquid separation is mixed with the reflux liquid after electrodialysis and then enters the concentrated chamber of the electrodialyzer, and the fresh water in the fresh water tank enters the dilute chamber of the electrodialyzer to realize the separation of the alcohol solution in the alcohol-containing waste liquid and concentration of metal ions. T...

Embodiment 2

[0038] Alcohol-containing waste liquid produced in the production process of lithium batteries, the content of lithium ions is 9×10 -4 g / L, the content of cobalt ion is 6×10 -3 g / L, the content of nickel ions is 4×10 -3 g / L. The alcohol-containing waste liquid passes through a multi-media filter and a precision filter to remove insoluble impurities in the alcohol-containing waste liquid. After the solid-liquid separation of the alcohol-containing waste liquid, the turbidity of the alcohol-containing waste liquid is 0.9mg / L, and the temperature of the waste liquid is 40°C.

[0039] The alcohol-containing waste liquid after solid-liquid separation is mixed with the reflux liquid after electrodialysis and then enters the concentrated chamber of the electrodialyzer, and the fresh water in the fresh water tank enters the dilute chamber of the electrodialyzer to realize the separation of the alcohol solution in the alcohol-containing waste liquid and concentration of metal ions. ...

Embodiment 3

[0043] The alcohol-containing waste liquid produced during the production of lithium batteries contains 7×10 lithium ions -4 g / L, the content of cobalt ion is 4.5×10 -3 g / L, the content of nickel ions is 3×10 -3 g / L. The alcohol-containing waste liquid passes through a multi-media filter and a precision filter to remove insoluble impurities in the alcohol-containing waste liquid. After the solid-liquid separation of the alcohol-containing waste liquid, the turbidity of the alcohol-containing waste liquid is 0.7mg / L, and the temperature of the waste liquid is 25°C.

[0044] The alcohol-containing waste liquid after solid-liquid separation is mixed with the reflux liquid after electrodialysis and then enters the concentrated chamber of the electrodialyzer, and the fresh water in the fresh water tank enters the dilute chamber of the electrodialyzer to realize the separation of the alcohol solution in the alcohol-containing waste liquid and concentration of metal ions. The con...

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Abstract

The invention relates to a comprehensive recycling method for alcohol-bearing waste liquid in a production process of lithium batteries. The method includes: (1) performing solid-liquid separation tothe alcohol-bearing waste liquid to remove impurities to obtain alcohol-bearing waste liquid at 5-40 DEG C, turbidity being less than 1 mg / L; (2) performing separation to the alcohol-bearing waste liquid at 5-40 DEG C, turbidity being less than 1 mg / L, with fresh water through an electrodialysis separator to obtain an alcohol solution and a metal ion concentrate A; (3) performing concentrating separation to the metal ion concentrate A through a reverse osmosis device to respectively obtain pure water and a metal ion concentrate B; (4) treating the metal ion concentrate B through a tandem apparatus A or a tandem apparatus B, which is formed successively from lithium ion, cobalt ion and nickel ion adsorption resin columns, in a manner of ion exchange desorption to respectively produce a lithium chloride solution, a cobalt chloride solution and a nickel chloride solution; (5) purifying the lithium chloride solution, cobalt chloride solution and nickel chloride solution respectively to obtain raw materials for a lithium battery cathode material. The method is low in energy-consumption, is green and environment-friendly, is high in separation efficiency and allows continuous operation.

Description

technical field [0001] The invention relates to the technical field of alcohol-containing organic waste liquid treatment, in particular to a comprehensive recovery method for alcohol-containing waste liquid in the production process of lithium batteries. Background technique [0002] In recent years, with the rapid development of new energy vehicles in my country, the demand for power batteries has soared, directly driving the rapid growth of related industries represented by lithium batteries. The output of lithium batteries is increasing year by year, and the large amount of alcohol-containing waste liquid produced in the production process has brought huge pressure on environmental protection and safe production. The main components in alcohol-containing waste liquid are methanol or ethanol. According to the "Inventory of Hazardous Chemicals", methanol and ethanol are both flammable and explosive hazardous chemicals. The stockpiling of a large amount of alcohol-containin...

Claims

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Application Information

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IPC IPC(8): C02F9/06
CPCC02F1/004C02F1/285C02F1/441C02F1/4693C02F9/00
Inventor刘晨李杰贾永忠马军
Owner青海中润惠德气体能源科技有限公司