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Aluminum foil nitrification formation process wastewater treatment method and device thereof

A treatment method and technology of nitric acid, applied in the directions of metallurgical wastewater treatment, water/sewage treatment, chemical instruments and methods, etc., can solve the problems of threats to the human living environment, high operating costs, hindering the sustainable development and technological progress of chemical foils, etc. Achieving good environmental and economic benefits, simple operation, and solving the effect of forming foil waste acid

Inactive Publication Date: 2019-03-29
SHANDONG TIANWEI MEMBRANE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two methods are relatively traditional, requiring huge investment in equipment and high operating costs, which are unbearable for general enterprises and will also produce secondary pollution.
The existence of these problems seriously hinders the sustainable development and technological progress of the formed foil industry, and at the same time poses a serious threat to the living environment of human beings

Method used

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  • Aluminum foil nitrification formation process wastewater treatment method and device thereof
  • Aluminum foil nitrification formation process wastewater treatment method and device thereof
  • Aluminum foil nitrification formation process wastewater treatment method and device thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0032] Refer to the attached Figure 4 , the treatment method of aluminum foil nitrification into process wastewater comprises the following steps:

[0033] (1) At room temperature, pass the aluminum foil containing nitric acid and aluminum nitrate into the process wastewater into the dialysis chamber 13 of the diffusion dialyzer 1, and simultaneously pass water into the diffusion chamber 14 of the diffusion dialyzer 1, and adjust the flow rate of the wastewater to 10ml / min. The water flow rate is 12ml / min, the nitric acid recovery solution flowing out from the diffusion chamber, and the raffinate containing aluminum nitrate flowing out from the dialysis chamber 13;

[0034] (2) At room temperature, the raffinate flowing out from the dialysis chamber 13 is passed into the desalination chamber 28 of the first electrodialyzer, and water is passed into the concentration chamber 29 of the first electrodialyzer at the same time, and the concentration is 1%. The sulfuric acid solut...

Embodiment 2

[0037] Refer to the attached Figure 4 , the treatment method of aluminum foil nitrification into process wastewater comprises the following steps:

[0038] (1) At room temperature, pass the aluminum foil containing nitric acid and aluminum nitrate into the process wastewater into the dialysis chamber 13 of the diffusion dialyzer 1, and simultaneously pass water into the diffusion chamber 14 of the diffusion dialyzer 1, and adjust the flow rate of the wastewater to 20ml / min. The water flow rate is 30ml / min, the nitric acid recovery solution flowing out from the diffusion chamber, and the raffinate containing aluminum nitrate flowing out from the dialysis chamber 13;

[0039] (2) At room temperature, the raffinate flowing out from the dialysis chamber 13 is passed into the desalination chamber 28 of the first electrodialyzer, and water is passed into the concentration chamber 29 of the first electrodialyzer at the same time, and the concentration is 1%. The sulfuric acid solut...

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Abstract

The invention provides an aluminum foil nitrification formation process wastewater treatment method. Firstly, through diffusion dialysis, aluminum and acid in wastewater are subjected to primary separation; recovered acid and residual liquid are obtained; then, the residual liquid and water are conveyed into a first electrodialyzer; aluminum and acid deep separation is performed; recovered acid and an aluminum nitrate solution are obtained; finally, the aluminum nitrate solution, hydrochloric acid or sulfuric acid and the water are conveyed into a second electrodialyzer; aluminum nitrate is further converted into nitric acid and aluminum chloride or an aluminum sulfate solution. The treatment method provided by the invention has the advantages that the defects of a traditional method are overcome; the acid consumption is reduced; the production cost is reduced; meanwhile, the resources are reasonably utilized; the operation is simple; the formed foil wastewater treatment can be bettersolved; good environmental benefits and economic benefits are achieved.

Description

technical field [0001] The invention relates to a treatment method for aluminum foil nitrification process wastewater, in particular to a method for treating aluminum foil nitrification process wastewater by using diffusion dialysis and electrodialysis. Background technique [0002] The main raw material of the formed foil factory is high-purity aluminum foil, which is finished by two processes of corrosion and chemical formation. In the corrosion process, the corrosion solution is mainly strong acid, and under certain production conditions, the aluminum foil will be corroded into a semi-finished product. This process has a high requirement on the concentration of the corrosive solution, and new solution needs to be continuously added, and the overflowed acid solution becomes waste acid solution. The waste acid liquid contains a large amount of acid, if it is discharged without treatment, it will not only cause a waste of resources, but also cause damage to the environment....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06C01B21/46C01F7/56C01F7/62C01F7/74C02F103/16
CPCC01B21/46C01F7/56C01F7/62C01F7/74C01F7/748C02F1/44C02F1/4693C02F2103/16
Inventor 娄玉峰郭锡伟张委张盼孙喜军马文娟
Owner SHANDONG TIANWEI MEMBRANE TECH