Electroplating nickel-containing wastewater treatment and recovery method

A recovery method and technology for nickel wastewater, applied in water/sewage treatment, neutralized water/sewage treatment, multi-stage water/sewage treatment, etc., can solve the problems of increased treatment cost, unremoved metal ions, consumption, etc., and achieve improvement The effect of removing ability, improving adsorption exchange ability, and improving separation effect

Pending Publication Date: 2020-12-01
上海顺樊环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a kind of electroplating nickel-containing wastewater treatment and recovery method, to solve the above-mentioned background technology that not only consumes a large amount of acid and alkali, improves the treatment cost, but also does not remove other metal ions.

Method used

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  • Electroplating nickel-containing wastewater treatment and recovery method

Examples

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Comparison scheme
Effect test

Embodiment 1

[0025] A method for treating and recycling electroplating nickel-containing wastewater, comprising the steps of:

[0026] S1. Pass the electroplating nickel-containing wastewater from bottom to top through the filter pipes provided with several sets of filter screens, and discharge it into the nickel-plating cleaning water tank;

[0027] S2. At a speed of 100r / min and a temperature of 35°C, pass carbon dioxide into the nickel-plating cleaning water tank at a flow rate of 0.08L / min, stir for 10 minutes, stop feeding carbon dioxide, and raise the temperature to 57°C and let stand for 30 minutes. Obtain the electroplating nickel-containing mixed turbid solution, then pass the electroplating nickel-containing mixed turbid solution through the bag filter at a flow rate of 0.4L / min, obtain the electroplating nickel-containing clear solution and discharge it into the buffer tank;

[0028] S3. Pass the electroplating nickel-containing clear liquid in the buffer tank through two sets o...

Embodiment 2

[0039] A method for treating and recycling electroplating nickel-containing wastewater, comprising the steps of:

[0040] S1. Pass the electroplating nickel-containing wastewater from bottom to top through the filter pipes provided with several sets of filter screens, and discharge it into the nickel-plating cleaning water tank;

[0041] S2. At a speed of 180r / min and a temperature of 28°C, pass carbon dioxide into the nickel-plating cleaning water tank at a flow rate of 0.05L / min, stir for 13 minutes, stop feeding carbon dioxide, and raise the temperature to 50°C and let stand for 34 minutes. Obtain the electroplating nickel-containing mixed turbid solution, then pass the electroplating nickel-containing mixed turbid solution through the bag filter at a flow rate of 0.5L / min, obtain the electroplating nickel-containing clear solution and discharge it into the buffer tank;

[0042] S3. Pass the electroplating nickel-containing clear liquid in the buffer tank through two sets o...

Embodiment 3

[0053] A method for treating and recycling electroplating nickel-containing wastewater, comprising the steps of:

[0054] S1. Pass the electroplating nickel-containing wastewater from bottom to top through the filter pipes provided with several sets of filter screens, and discharge it into the nickel-plating cleaning water tank;

[0055] S2. At a rotation speed of 240r / min and a temperature of 30°C, pass carbon dioxide into the nickel-plating cleaning water tank at a flow rate of 0.1L / min, stir for 16 minutes, stop feeding carbon dioxide, and raise the temperature to 54°C and let stand for 38 minutes. Obtain the electroplating nickel-containing mixed turbid solution, then pass the electroplating nickel-containing mixed turbid solution through the bag filter at a flow rate of 0.3L / min, obtain the electroplating nickel-containing clear solution and discharge it into the buffer tank;

[0056] S3. Pass the electroplating nickel-containing clear liquid in the buffer tank through tw...

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Abstract

The invention discloses an electroplating nickel-containing wastewater treatment and recovery method, and relates to the field of wastewater treatment. According to the method, carbon dioxide is introduced; on one hand, carbon dioxide and water are mixed to generate bicarbonate ions; the carbonate ions are weak acid, the pH value of the electroplating nickel-containing wastewater can be adjusted to be neutral to weakly acidic; on the other hand, the generated bicarbonate ions react with calcium ions, magnesium ions and aluminum ions to generate calcium bicarbonate, magnesium bicarbonate and aluminum carbonate respectively; calcium bicarbonate and magnesium bicarbonate are hydrolyzed into calcium carbonate, magnesium carbonate and carbon dioxide gas under high temperature; calcium carbonateand magnesium carbonate precipitates are hydrolyzed immediately to generate aluminum hydroxide and carbon dioxide and aluminum hydroxide precipitates due to too weak chemical bonds among aluminum, carbon and oxygen so that calcium ions, magnesium ions and aluminum ions in the electroplating nickel-containing wastewater are removed, and the content of other ions in the recovered nickel solution and the content of metal ions in water after wastewater treatment are reduced.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a method for treating and recycling electroplating nickel-containing wastewater. Background technique [0002] The electroplating industry is an important processing and productive industry with strong versatility, wide use, cross-industry, and cross-department. The wastewater discharged by electroplating enterprises reaches hundreds of millions of tons every year, accounting for about 10% of the total wastewater discharge and the total industrial wastewater discharge. 20% of the total amount, the discharge of electroplating wastewater seriously affects water resources and leads to the loss of a large amount of precious metals. [0003] At present, the common treatment methods of electroplating wastewater include chemical method, ion exchange method and membrane separation method. Among them, the chemical method is mature, but consumes a lot of chemical reagents, and the foll...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F101/20
CPCC02F1/001C02F1/42C02F1/66C02F9/00C02F2001/007C02F2001/425C02F2101/20C02F2303/14
Inventor 罗尚杨王顺峰吴重文
Owner 上海顺樊环保科技有限公司
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