Technology and device for removing heavy metal ions in electroplating wastewater

A technology for heavy metal ions and electroplating wastewater, which is applied in metallurgical wastewater treatment, separation methods, water/sewage treatment, etc., can solve the problems of metal recycling limitations, difficulty in monitoring and recycling of trace heavy metals, and improve wastewater Effects of throughput, improvement of purity, and cost reduction

Inactive Publication Date: 2014-04-09
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These methods have certain restrictions on the recycling of metals, and it is difficult to monitor and recycle trace heavy metals.

Method used

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  • Technology and device for removing heavy metal ions in electroplating wastewater
  • Technology and device for removing heavy metal ions in electroplating wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] In this embodiment, the heavy metal ion removal device is a stage, such as figure 1 As shown, there is a desalination chamber, two concentrating chambers and two electrode chambers between the electrodes. The titanium ruthenium-plated electrode is used as the anode, the stainless steel electrode is used as the cathode, and the cathode and anode electrodes are inlaid on the reinforcement plates on both sides for reinforcement. The size of the separator in the desalination chamber and the electrode chamber is 800×250×10mm, the size of the separator in the concentration chamber is 800×250×2mm, the size of the reinforcing plate is 800×250×30mm, and the effective membrane area is 200cm 2 . Both the anion and cation membranes are domestically produced anion and cation exchange membranes, the fibers are domestic anion and cation exchange fibers, and the resin is domestic anion and cation exchange resins. Among them, the proportion of cation exchange fiber in the desalination ...

Embodiment 2

[0026] In this embodiment, the heavy metal ion removal device is similar to that in Embodiment 1. There is a desalination chamber, two concentrating chambers and two electrode chambers between the two electrodes, and carbon fiber cloth is used as the cathode and anode respectively. The dimensions of the desalination chamber partition are 500×200×2mm, the size of the electrode chamber partition is 500×200×3mm, the size of the concentration chamber partition is 500×200×1mm, and the size of the reinforcement plate is 500×200× 25mm effective membrane area is 96cm 2 . The ion exchange membrane used is a domestically produced homogeneous anion-cation exchange membrane, the fiber is a domestically produced anion-cation exchange fiber, and the resin is a domestically produced anion-cation exchange resin. Among them, the proportion of cation exchange fibers in the mixed ion exchange fibers in the desalination chamber is 80%. The raw water entering the desalination chamber is a 1mg / L h...

Embodiment 3

[0028] In this embodiment, the heavy metal ion removal device is the same as in Embodiment 2, and what is changed is that ion exchange resin is filled in the desalination chamber as the ion exchange medium. The ion exchange resin with the same ratio of anion and cation in 2 is operated under the current condition of 150mA. After two hours of operation, the conductivity of the fresh water effluent also drops to 1μS / cm, but the enrichment factor of the concentrated water cycle is about 60 times. , less than the desalination chamber filled with mixed ion exchange fibers as the exchange transfer medium.

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Abstract

The invention provides a technology and a device for removing heavy metal ions in electroplating wastewater, and belongs to the electroplating wastewater treatment technology. The continuous electrodeionization technology is employed to remove heavy metal ions with low concentrations in a solution and recyle the metal ions, which plays an important role in environmental protection. The metal ions which go into a membrane stack are transferred towards the direction of a cathode 8, penetrate a membrane 9, and go into a concentration chamber 13. The metal ions are subjected to enrichment in cyclic concentrated water, and as time goes by, high enrichment factor and high removal efficiency can be obtained. The device can remove and enrich single heavy metal ion or mixed heavy metal ions in waste water continuously, and has advantages of low energy consumption, minimal environment pollution and the like.

Description

technical field [0001] The invention belongs to the technical field of electroplating wastewater treatment, and in particular provides a process and a device for removing heavy metal ions in electroplating wastewater. Background technique [0002] In today's society, with the continuous development of the automobile industry and the steel industry, the wastewater discharged from mining, metallurgy, metal processing, electroplating and other industries has become an important source of water environmental pollution. The research on these wastewater treatment has become an important issue in the world today. one of the research topics. Due to the low concentration of heavy metal ions in these wastewaters, and the large amount of wastewater discharged, which cannot be degraded naturally, and the pollution area of ​​discharged wastewater is very wide, it is difficult, time-consuming and costly to treat wastewater. Nowadays, wastewater treatment methods include chemical precipit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/469C02F1/62C02F103/16
Inventor 管山孙帅帅张文文赵佳杨一超郭玉高
Owner TIANJIN POLYTECHNIC UNIV
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