Process for recovering heavy metal ions in lead-acid storage battery sewage

A heavy metal ion, lead-acid battery technology, applied in the fields of magnetic field/electric field water/sewage treatment, water/sewage treatment, water/sewage multi-stage treatment, etc., can solve the problem of unstable treatment efficiency, long reaction period and large footprint And other issues

Active Publication Date: 2022-03-04
安徽威能电源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of the precipitation method is that the equipment is simple and easy to operate, but the disadvantage is that it is not suitable for low-concentration wastewater; the advantage of the electrolysis method is that it has no secondary pollution and can realize the reuse of lead, but the disadvantage is that it consumes a lot of energy and costs; the advantage of the adsorption method is that the source of raw materials is wide , the disadvantage is that it is difficult to recycle; the advantages of the ion exchange method are small footprint, convenient management, no secondary pollution, and recyclable lead; the disadvantage is that the reaction cycle is long and the o

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0048] The preparation method of the heavy metal adsorbent selected in the present invention is as follows:

[0049]1) Weigh 2.0g of nano-silica and disperse it in 160g of N-N dimethylamide, ultrasonicate at 200W for 30min at room temperature to obtain a dispersion, then add 10g of polyacrylonitrile into the dispersion, and heat it at 60°C Stir rapidly at 800r / min for 20h, and then obtain composite fiber precursors by electrospinning. The distance between the electrospinning needle tip and the receiving plate is 15cm, the voltage is 15kV, and the flow rate is stable at 0.5mm / min. Keep at 280°C for 2h in an air atmosphere, and then carbonize at 700°C for 30min in a nitrogen atmosphere to obtain composite carbon nanofibers;

[0050] 2) According to the ratio of 1:10g / mL, the composite carbon nanofibers were mixed with potassium permanganate solution with a concentration of 0.3mol / L, and the pH of the solution was adjusted to 2.0 with dilute nitric acid. Min was continuously sti...

Embodiment 1

[0053] A recovery process for heavy metal ions in lead-acid battery sewage, the specific process method is as follows:

[0054] The sewage generated in the production of lead-acid batteries is introduced into the oil-separating sedimentation tank. The oil-separating sedimentation tank adopts a flat flow structure, and the large particles in the sewage and the oil floating on the water surface are removed, and then the treated sewage is introduced into the treatment tank. In the process, heavy metal adsorbents are added to the treatment tank for sedimentation, and the content of heavy metal adsorbents is controlled to 2g / L, and the sedimentation time is controlled at 5min. During the sedimentation process, 30r / min stirring can be carried out, which can make the sewage in the sewage The heavy metal in the heavy metal is fully contacted with the heavy metal adsorbent, thereby accelerating the adsorption efficiency of the heavy metal adsorbent to the heavy metal in the sewage;

[...

Embodiment 2

[0067] A recovery process for heavy metal ions in lead-acid battery sewage, the specific process method is as follows:

[0068] The sewage generated in the production of lead-acid batteries is introduced into the oil-separating sedimentation tank. The oil-separating sedimentation tank adopts a flat flow structure, and the large particles in the sewage and the oil floating on the water surface are removed, and then the treated sewage is introduced into the treatment tank. In the process, heavy metal adsorbent is added to the treatment tank for sedimentation, and the content of heavy metal adsorbent is controlled to 5g / L, and the sedimentation time is controlled at 8min. During the sedimentation process, 50r / min stirring can be carried out, and the sewage can be made The heavy metal in the heavy metal is fully contacted with the heavy metal adsorbent, thereby accelerating the adsorption efficiency of the heavy metal adsorbent to the heavy metal in the sewage;

[0069] Take out t...

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PUM

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Abstract

The invention discloses a recovery process of heavy metal ions in lead-acid storage battery sewage, and relates to the technical field of sewage treatment.The specific process comprises the following steps that sewage is guided into a treatment pond containing a heavy metal adsorbent for multi-stage sedimentation, and then sediment at the bottom of the pond is dried and ground into powder; and the wastewater is conveyed into a recovery tank of a high-voltage power supply through an air blower and can be settled in different areas under an electric field, so that the heavy metal ions in the wastewater are recovered. According to the invention, sewage is introduced into a treatment pool containing a heavy metal adsorbent for multistage sedimentation, then sediments at the bottom of the pool are dried and ground into powder, the powder is sent to a recovery tank of a high-voltage power supply through an air blower, and sedimentation in different areas is generated by utilizing the fact that charged substances and uncharged substances can move in different tracks under an electric field. Therefore, the heavy metal adsorbent adsorbing the heavy metal in the precipitate can be separated from other impurities, and the purpose of recycling the heavy metal is achieved.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a recovery process for heavy metal ions in lead-acid storage battery sewage. Background technique [0002] The application fields of lead-acid batteries are very wide, so they are widely welcomed. The most characteristic of lead-acid batteries is that they do not consume earth resources. This advantage is applied by all walks of life, and the market demand for lead-acid batteries continues to increase. However, the large-scale development of lead-acid batteries also causes certain environmental pollution. Therefore, higher requirements are put forward for the pollution prevention and control of the lead-acid battery industry. A large amount of production sewage is formed in lead-acid battery production enterprises, and the main pollutant in the sewage is lead. Lead, as a class of pollutant, is carcinogenic to many tissues and systems of the human body. The d...

Claims

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Application Information

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IPC IPC(8): C02F9/12C02F101/20
CPCC02F9/00C02F1/288C02F2001/007C02F1/48C02F2101/20C02F2301/08Y02W30/84
Inventor 赵强胡孙日
Owner 安徽威能电源科技有限公司
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