Method for treating waste water generated from surface treatment of aluminum products

A technology of surface treatment and treatment method, which is applied in the field of waste water classification treatment process to achieve the effect of low operating cost, low investment and easy operation

Active Publication Date: 2014-06-25
广州键洋环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in this document, only the treatment of chromium and fluorine is involved. In the actual surface treatment of aluminum products, the pollutants are not only in this

Method used

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  • Method for treating waste water generated from surface treatment of aluminum products
  • Method for treating waste water generated from surface treatment of aluminum products
  • Method for treating waste water generated from surface treatment of aluminum products

Examples

Experimental program
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Effect test

Embodiment 1

[0042] S101: Take 200ml of sulfuric acid degreasing and rinsing waste water, irradiate it in a microwave oven with a power of 4Kw and a frequency of 915MHz for 2 minutes, use a separatory funnel to separate water and oil, and remove about 2.5ml of oil.

[0043] S102: Mix 150ml of microwave degreased water, 150ml of tri-acid rinsing wastewater, 150ml of sulfuric acid anodizing rinsing wastewater and 150ml of nitric acid neutralizing rinsing wastewater, add 120ml of pre-filtered and purified alkaline washing rinsing wastewater, stir to neutralize and add triphosphate Sodium 2.5 and polyacrylamide ammonium (concentration 0.1%) aqueous solution 5ml, wastewater pH value is 7.5, centrifugal filtration to obtain 24.5g aluminum phosphate, the hardness of the filtered water is 95.4mg / L, which meets the requirements of recycling.

[0044] S103: Add 200ml of ammonium bifluoride pickling and rinsing wastewater to 54ml of pre-filtered and purified alkali washing and rinsing wastewater. The ...

Embodiment 2

[0047] S201: Take 200ml of sulfuric acid degreasing and rinsing wastewater, irradiate it in a microwave oven with a power of 2Kw and a frequency of 915MHz for 1 minute, use a separatory funnel to separate water and oil, and remove about 2.1ml of oil.

[0048] S202: Mix 150ml of microwave degreased water, 120ml of tri-acid rinsing wastewater, 150ml of sulfuric acid anodizing rinsing wastewater and 150ml of nitric acid neutralizing rinsing wastewater, add 150ml of pre-filtered and purified alkaline washing rinsing wastewater, stir to neutralize and add 3.5g Trisodium phosphate and ammonium polyacrylamide (concentration: 0.1%) aqueous solution was 2.5ml, the pH value of the waste water was 9, 25.3g of aluminum phosphate was obtained by centrifugal filtration, and the hardness of the filtered water was 101.7mg / L, which met the requirement of recycling.

[0049] S203: Add 100ml of ammonium bifluoride pickling and rinsing wastewater to 40ml of pre-filtered and purified alkali washing...

Embodiment 3

[0052] S301: Take 200ml of sulfuric acid degreasing and rinsing waste water, irradiate it in a microwave oven with a power of 5Kw and a frequency of 915MHz for 5 minutes, and use a separatory funnel to separate water and oil to remove about 2.7ml of oil.

[0053] S302: Mix 150ml of microwave degreased water, 150ml of tri-acid rinsing wastewater, 150ml of sulfuric acid anodizing rinsing wastewater and 150ml of nitric acid neutralizing rinsing wastewater, add 100ml of pre-filtered and purified alkaline washing rinsing wastewater, stir to neutralize and add triphosphate Sodium 1.5g and polyacrylamide ammonium (concentration 0.4%) aqueous solution 4ml, wastewater pH value is 5, aluminum phosphate 23.6g is obtained by centrifugal filtration, the hardness of filtered water is 101.4mg / L, which meets the requirements of recycling.

[0054] S303: Add 200ml of ammonium bifluoride pickling and rinsing wastewater to 40ml of pre-filtered and purified alkali washing and rinsing wastewater. T...

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Abstract

The invention discloses a method for treating waste water generated from surface treatment of aluminum products, which realizes the treatment of waste water generated during each step of surface treatment of the aluminum products. The waste water generated from the treatment process comprises sulfuric acid oil removal rinsing waste water, three acids treated rinsing waste water, ammonium bifluoride pickling rinsing waste water, alkali washing rinsing waste water, nitric acid neutralized rinsing waste water, sulfuric acid anodized rinsing waste water, nickel plating rinsing waste water and acetic acid hole sealing rinsing waste water. The method of the invention aims at the treatment of waste water generated by all the steps in the surface treatment, a set of integrated technology flow is formed, the method is easy to be used for enterprises; the properties of various waste water can be utilized with a large degree, the usage of an auxiliary agent can be reduced by mutual reaction and mutual deposition, and the cost can be reduced.

Description

technical field [0001] The invention relates to a treatment method for waste water produced in the surface treatment of aluminum products, which belongs to the classification treatment process for the waste water produced in the process of metal surface treatment. Background technique [0002] In aluminum products, such as aluminum profiles, the surface treatment process generally goes through eight steps, namely, sulfuric acid degreasing, triacid treatment, ammonium bifluoride pickling, alkali cleaning, nitric acid neutralization, sulfuric acid anodizing, nickel plating and nickel acetate sealing. Each step produces waste water, which needs to be treated and recycled in order to reduce water consumption and control environmental pollution based on the needs of environmental protection and energy saving. The treatment method in the prior art is to centrally treat the wastewater in each step, neutralize it with lime to neutrality, and then discharge it through plate and frame...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F1/40C02F1/66C02F1/56C02F1/72
Inventor 张宏智李汉琨张迎生
Owner 广州键洋环保科技有限公司
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