Wastewater treatment method after purification of lithium ion battery negative material spherical graphite

A lithium-ion battery and negative electrode material technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problem of slow sedimentation of sludge and achieve good operating conditions and extended Long-lasting, easy-to-control effects

Active Publication Date: 2014-07-02
ZHANJIANG JUXIN NEW ENERGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of this process, each sludge treatment tank produces sludge, and the CaF 2 Sludge settles slowly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The wastewater treatment method after the graphite is purified, the method steps are:

[0034] Step 1, take 75% of water and 25% of quicklime and mix by weight percentage to obtain calcium hydroxide solution for subsequent use.

[0035] Step 2. Send the acid waste water produced in the graphite purification process to the first-level purification treatment device for purification. The purification method is: lift the wastewater from the adjustment tank to the first-level pH adjustment reaction tank through the lift pump, and turn on the mixer at 120 rpm. Stir at a high speed, and add calcium hydroxide solution through the dosing pump to make the pH value of the primary pH adjustment reaction tank 6.0. Then the sewage flows into the first-level coagulation reaction tank and stirred, and PAC solution (polyaluminum chloride) is added to the first-level coagulation reaction tank, and the coagulation reaction is 20 minutes; then PAM is added to the first-level coagulation re...

Embodiment 2

[0038] Step 1, take 80% of water and 20% of quicklime and mix by weight percentage to obtain calcium hydroxide solution for subsequent use.

[0039] Step 2. Send the acidic waste water produced in the graphite purification process into the pH pre-adjustment pool, add calcium hydroxide solution into the pH pre-adjustment pool through the dosing pump, turn on the mixer to stir at a speed of 120 rpm, and make the pH pre-adjustment pool Adjust the pH of the pool to 5.0.

[0040] Step 3: send the waste water adjusted in the pH pre-adjustment pool to the adjustment pool for storage, and start the air agitator to even out the water quality.

[0041] Step 4. Send the wastewater from the regulating tank to the first-level purification treatment device for purification. The purification method is: lift the wastewater from the regulating tank to the first-level pH adjustment reaction tank through the lifting pump, turn on the mixer to stir at a speed of 120 rpm, and pass The dosing pump...

Embodiment 3

[0044] Step 1, take 85% of water and 15% of quicklime and mix by weight percentage to obtain calcium hydroxide solution for subsequent use.

[0045] Step 2. Send the acidic waste water produced in the graphite purification process into the pH pre-adjustment pool, add calcium hydroxide solution into the pH pre-adjustment pool through the dosing pump, turn on the mixer to stir at a speed of 150 rpm, and make the pH pre-adjustment pool Adjust the pH of the pool to 5.0.

[0046] Step 3: send the waste water adjusted in the pH pre-adjustment pool to the adjustment pool for storage, and start the air agitator to even out the water quality.

[0047] Step 4. Send the wastewater from the regulating tank to the first-level purification treatment device for purification. The purification method is: lift the wastewater from the regulating tank to the first-level PH adjustment reaction tank through the lifting pump, turn on the mixer to stir at a speed of 130 rpm, and pass The dosing pump...

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Abstract

The invention provides a wastewater treatment method after purification of lithium ion battery negative material spherical graphite. Wastewater is treated in two levels, firstly, the wastewater enters into a first-level pH adjusting reaction pool to adjust pH; the wastewater treated by the first-level treatment enters into a second-level pH adjusting pool. The method provided by the invention has the advantages of fast treatment speed and stable purifying effect. The quality of the wastewater purified meets the standard and can be recycled or directly discharged. The method is simple and convenient to operate, easy to control, small in labor intensity of workers and good in operating condition, and does not cause personal injury to the workers. As the wastewater is treated under a condition close to neutral, the service life of equipment is prolonged. The cured sludge can be recovered and comprehensively utilized in the aspects such as refractory materials, casting materials and the like.

Description

technical field [0001] The invention relates to a sewage treatment method, in particular to a sewage treatment method after purification of spherical graphite, a negative electrode material of a lithium ion battery Background technique [0002] Lithium-ion batteries have become a new generation of secondary batteries since the 1990s after nickel-metal hydride batteries because of their advantages such as high operating voltage, high energy density, long cycle life, small self-discharge, and no memory effect. During the development of lithium-ion battery technology, battery quality has been continuously improved and production costs have been continuously reduced. Anode materials have played a large role in the contribution to the technological progress of lithium-ion batteries. At present, the anode materials of commercial lithium-ion batteries are still dominated by graphite materials, among which natural graphite is widely used because of its high charge and discharge cap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04
Inventor 吴其修刘明东李佳坤郭庆
Owner ZHANJIANG JUXIN NEW ENERGY
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