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Sewage treatment method and system used by same

A sewage treatment method and sewage treatment system technology, applied in water/sewage treatment, multi-stage water/sewage treatment, neutralized water/sewage treatment, etc. Low interception rate and other issues, to achieve the effect of reducing production costs, good actual treatment effect, and zero discharge

Inactive Publication Date: 2012-06-27
WUXI JIANGTIAN HIGH TECH NANO MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the nanofiltration membrane is used alone, due to the large flux, its interception rate for copper ions and other metal ions is too low to meet the requirements of greatly improving the ion removal rate
However, if the reverse osmosis membrane is used alone, in addition to rapid membrane fouling, the flux is too low, the operating pressure is high, and the energy consumption is too high, so the overall efficiency is very low and it is not competitive
It can be said that the method of using membrane filtration alone not only cannot achieve the purpose of completely removing heavy metal ions, but also causes membrane pollution, so it is not practical
When using the method of concentration first and then precipitation to treat sewage, reverse osmosis membranes are generally selected instead of nanofiltration membranes for the purpose of concentration, but this will seriously pollute the reverse osmosis membranes

Method used

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  • Sewage treatment method and system used by same
  • Sewage treatment method and system used by same
  • Sewage treatment method and system used by same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 11

[0069] figure 2 It is a schematic diagram of a sewage treatment system provided by the present invention. The sewage treatment system of the present invention comprises:

[0070] The primary water storage tanks 2 and 3 are used to store raw sewage water;

[0071] The nanofiltration membrane unit 9 is connected to the primary water storage tanks 2 and 3, and is used to carry out the concentration and filtration of the primary nanofiltration membrane to the above-mentioned sewage. Sales of commercial nanofiltration membranes;

[0072] The first static storage tank 5, which is connected to the nanofiltration membrane unit 9, is used to add crystal seeds to the sewage concentrated by the nanofiltration membrane to induce crystallization;

[0073] The secondary water inlet storage tanks 10 and 11, which are connected to the nanofiltration membrane unit 9, are used to store the above-mentioned sewage filtered through the nanofiltration membrane, and are the water inlet tanks of ...

Embodiment 12

[0081] image 3 It is a schematic diagram of another sewage treatment system provided by the present invention. and figure 2 Compared to the system shown in the image 3 The shown sewage treatment system also includes a cation exchange resin 19A, an anion exchange resin 19B and an outlet pipeline 20. The cation exchange resin 19A is connected to the outlet water storage tank 16 through a pipeline 18, and the anion exchange resin 19B is connected to the outlet pipeline 20.

Embodiment 13

[0083] Figure 4 It is a schematic diagram of another sewage treatment system provided by the present invention. and image 3 Compared to the system shown in the Figure 4 The shown sewage treatment system also includes an activated carbon treatment unit 19C, wherein the cation exchange resin 19A is connected to the effluent storage tank 16 through a pipeline 18, the cation exchange resin 19A, the anion exchange resin 19B are connected to the activated carbon treatment unit 19C, and the activated carbon treatment unit 19C is connected to the effluent storage tank 16. Line 20 is connected. It should be understood that the activated carbon treatment unit 19C of the present embodiment and the cation exchange resin 19A and the anion exchange resin 19B of the embodiment 1.2 may not be used at the same time, that is, the activated carbon treatment unit 19C of the present embodiment may be used separately with figure 2 The systems shown are used in combination.

[0084] The sewa...

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Abstract

The invention relates to the field of industrial sewage treatment, in particularly to a sewage treatment method and a system used by the same. The sewage treatment method provided by the invention is characterized by comprising the following steps of: firstly, using nanometer filter films for concentrating sewage raw water so that the concentration of diatomic and polyatomic metal ions in the sewage raw water can be approximate to the saturation state; then, adding seed crystals for inducing the crystallization so that the diatomic or polyatomic heavy metal ions in the sewage can be more effectively removed in comparison with a traditional precipitation method, and the pollution on a reverse osmosis filter film caused by next step can also be avoided; then, using the reverse osmosis filter film for further filtering metal irons and other impurities remained in the sewage filtered by the reverse osmosis filter film to obtain reusable water and realize zero discharge; and more preferably, optionally carrying out anion / cation exchange resin and / or active carbon treatment after processing of the reverse osmosis filter films. The goal of preparing ultra pure water from sewage containing heavy metal ions in the solar industry can be realized.

Description

technical field [0001] The invention relates to the field of industrial sewage treatment, in particular to a treatment method for sewage containing heavy metal ions in solar energy industry, electroplating industry, semiconductor and microelectronics industry. Specifically, the present invention relates to a sewage treatment method and a system used in the treatment method. Background technique [0002] In the manufacturing process of photovoltaic products in the solar energy industry, a large amount of harmful substances such as hydrofluoric acid and heavy metal organic substances are used, such as heavy metal ions such as nickel, copper, silver, chromium, mercury, or their combination with polyacrylic acid, polypyrrolidone, polyethylene Organic substances formed from glycols, polystyrene acid, polyethylenediamine, etc. The sewage generated by the above-mentioned manufacturing process has a complex composition and is extremely difficult to treat. [0003] However, the cur...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F1/44C02F1/66C02F1/42C02F1/28
CPCB01D2317/022C02F2101/10C02F1/52B01D61/022C02F9/00B01D2311/26B01D61/025C02F1/441B01D61/027C02F1/44Y02W10/37B01D2311/2643B01D61/029
Inventor 刘继斌汲江丁志伟胡晓宏单德生谭清廖书田陆海锋
Owner WUXI JIANGTIAN HIGH TECH NANO MATERIAL
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