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A treatment method for recycling residual acid from waste lead-acid batteries

A lead-acid battery and treatment method technology, applied in chemical instruments and methods, waste collector recycling, water/sewage multi-stage treatment, etc., can solve the problems of backward production scale, low recycling efficiency, inconvenient operation, etc. Effect of Suspended Matter Loading

Active Publication Date: 2019-09-20
CHAOWEI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, these treatment methods have low filtration efficiency, cannot completely remove expansion agents such as barium sulfate and lignosulfonate in the electrolyte, and will cause problems such as impurity entering the positive active material and affecting the cycle life of the battery.
[0003] Chinese patent literature (announcement date: July 3, 2013, announcement number: CN 102534220B) discloses a closed-cycle recycling method for waste lead-acid batteries, which solves the problem of recycling existing waste lead-acid batteries due to processing equipment, Low recovery efficiency, serious pollution and other problems exist due to backward technology, production scale, etc.
[0005] The above-mentioned technical solutions basically recycle waste batteries by chemical means, and the treatment process is complicated and the operation is inconvenient

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A method for recycling residual acid from waste lead-acid batteries, comprising the following steps:

[0028] Step 1: Put the waste lead-acid battery into the crushing equipment for crushing, and screen the battery fragments discharged from the crushing device to obtain the waste acid solution;

[0029] Step 2: Add additives to the waste acid solution, pass the waste acid solution mixed with lead plaster and additives into the primary sedimentation tank, and let it settle for 1 to 2 hours;

[0030] Step 3: The waste acid solution in step 2 is discharged from the upper part of the sedimentation tank into the secondary filter tank, and the filtrate enters the secondary filter tank for grid filtration to remove active substances and obtain the sulfuric acid electrolyte for initial treatment;

[0031] Step 4: Inject the initial treatment sulfuric acid electrolyte in step 3 into the tertiary osmosis tank, add flocculant to the filtrate, stir and mix well, then let it settle ...

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PUM

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Abstract

The invention discloses a waste lead-acid storage battery spent acid recycling method. Most impurities in spent acid solution are filtered by a physical filtering method, colloidal substances and large-particle suspended matters are removed by a flocculant mode, ultrafine barium sulfate particle suspended matters and lignosulfonate remain, lignin and lead carbonate ultrafiltration lead sulfate particles are decomposed by an electrolytic process, and sulfuric acid electrolyte can be recycled again. Recycled sulfuric acid is treated by the process, the impurities in the electrolyte can be screened and removed step by step, filtering efficiency is improved, expanding agents such as barium sulfate and lignosulfonate in the electrolyte are completely removed, and the influence of entering of the impurities in positive active materials on the cycle life of a battery is avoided.

Description

technical field [0001] The invention relates to the technical field of accumulators, and more specifically relates to a treatment method for reusing residual acid of waste lead-acid accumulators. Background technique [0002] A large amount of acidic lead metal waste liquid is produced during the recycling process of lead-acid batteries. If it is discharged without treatment, it will inevitably bring great harm to the environment and society. Lead in waste liquid is a heavy metal element and is a kind of pollutant. Currently, the treatment methods for heavy metal wastewater mainly include chemical precipitation, ion exchange resin, electrolysis, activated carbon adsorption, reverse osmosis, electrodialysis, and evaporation concentration. law and biological law. At present, these treatment methods have low filtration efficiency, cannot completely remove expansion agents such as barium sulfate and lignosulfonate in the electrolyte, and will cause problems such as impurity ent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/54C02F9/06
Inventor 柯娃吴亮
Owner CHAOWEI POWER CO LTD
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