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Process and device for recovering electrolytic copper from copper-containing wastewater

A technology for electrolysis of copper and wastewater, applied in the fields of metallurgical wastewater treatment, water pollutants, water/sewage treatment, etc., can solve the problems of difficult to remove impurities in concentrated liquid, accumulation of harmful impurities in tank liquid, etc., and achieve high economic value and resource recovery. high rate effect

Active Publication Date: 2015-07-15
NANJING LINEHOME ENVIRONMENTAL TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is rare to use membrane technology to recover copper in copper plating wastewater. One of the reasons is that the concentrated solution recovered by membrane method is difficult to remove the impurity components, resulting in the accumulation of harmful impurities in the bath, so it cannot be used directly in the plating tank. Second, for the recovery of acidic copper plating wastewater by membrane method, the obtained concentrated copper sulfate solution is the same as the above-mentioned ion exchange method, and still cannot be directly returned to the copper plating bath for use

Method used

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  • Process and device for recovering electrolytic copper from copper-containing wastewater
  • Process and device for recovering electrolytic copper from copper-containing wastewater
  • Process and device for recovering electrolytic copper from copper-containing wastewater

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Using the device in Example 2, the copper-containing waste water first enters the sump 1, and after the sump is preliminarily settled, it is pumped by a centrifugal pump by 1m 3 The flow rate of / h is sent to the bag filter 2 to filter and remove solid impurities, and then enters the activated carbon sand filter column 3 for purification. The activated carbon uses coconut shell activated carbon with a particle size of 3-5mm and an iodine value of 800-1000. The wastewater meets the purification requirements, and the suspended matter in the wastewater is ≦5mg / L. The detection values ​​are shown in Table 2:

[0028] Table 2

[0029]

[0030] The waste water treated by the activated carbon sand filter column 3 enters the first transfer tank 4, and then presses the centrifugal pump by 1m 3 The flow rate of / h is sent into the first exchange column 5 and the second exchange column 6 equipped with macroporous adsorption resin, and the first exchange column 5 is equipped wi...

Embodiment 2

[0040] Such as figure 1 , a device for realizing the process of recovering electrolytic copper from copper-containing wastewater, including a pre-treatment unit, a membrane system treatment unit and an electrolytic copper production unit: the pre-treatment unit includes a water collection tank 1, a bag filter 2, an activated carbon sand filter column 3, The first transfer tank 4, the first exchange column 5, the second exchange column 6, and the second transfer tank 7, wherein the outlet of the water collection tank 1 is connected to the inlet of the bag filter 2, and the outlet of the bag filter 2 is connected to the inlet of the activated carbon sand filter column 3 , the activated carbon sand filter column 3 is connected to the inlet of the first exchange column 5 through the first transfer tank 4, the first exchange column 5 and the second exchange column 6 are connected in series, and the outlet of the second exchange column 6 is connected to the membrane system through th...

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Abstract

The invention relates to a process and device for recovering electrolytic copper from copper-containing wastewater. The electrolytic copper is produced by adopting the technological processes of removing suspended matters and part of organic matters through pretreatment, carrying out ultrafiltration treatment, retaining concentrated copper sulfate with a nanofiltration membrane, recovering wastewater and acids with a reverse osmosis membrane and carrying out cyclone electrolysis. The process and the device have the beneficial effects that the recovery rate of the electrolytic copper is 90% and the copper purity is more than 99.95%; meanwhile, the wastewater recovery rate is more than 90%; the recovery rate of free sulfuric acid in the wastewater is more than 90%; the resource recovery rate is high and the economic benefits are good; adopting the technological processes of combined adsorption resin, ultrafiltration membrane, acid stabilizing nanofiltration membrane and high desalting rate reverse osmosis membrane, compared with other membrane recovery systems, the process has the advantage that the properties and service lives of the membranes can be maintained for a long term; the process has the effects of achieving automatic control and ensuring stable operation of a wastewater treatment system and the quality of recovered matters; the process is suitable for recovering copper in the copper-containing wastewater in the electroplating industry, the electronic industry and the metallurgical industry and other copper-containing industrial wastewater and for wastewater treatment.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a process and a device for recovering electrolytic copper from copper-containing wastewater. Background technique [0002] At present, the technical methods used to treat nickel plating wastewater at home and abroad mainly include chemical method, membrane method and ion exchange method. According to the requirements of the cleaner production law, electroplating enterprises have strict requirements on metal resource utilization rate and water saving rate. It is the basic requirement of electroplating wastewater treatment to realize the effective recovery of heavy metals and waste water recycling while electroplating wastewater treatment. [0003] (1) Chemical method: At present, some electroplating enterprises still use chemical method to treat copper plating wastewater. The chemical treatment method is to add sodium hydroxide or milk of lime (calcium hyd...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/08C02F1/44C02F1/461C02F101/20C02F103/16
Inventor 郑泽邻郑宏
Owner NANJING LINEHOME ENVIRONMENTAL TECH CO LTD
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