Waste water treating method in aluminum section bar oxidizing technology

A technology for aluminum profile oxidation and wastewater treatment, which is applied in water/sewage treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc. The problem of high disposal costs is to achieve the effect of maximizing utilization, saving disposal costs and high recovery efficiency.

Inactive Publication Date: 2013-04-17
苏州万科环境工程有限公司
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Problems solved by technology

The traditional wastewater treatment process is used to treat wastewater, which requires high treatment costs and requires a large amount of water treatment chemicals. The treated effluent is directly discharged, which wastes a lot of water resources.
The treated wastewater contains heavy meta

Method used

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  • Waste water treating method in aluminum section bar oxidizing technology

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Embodiment Construction

[0022] In order to enable those skilled in the art to better understand the solution of the present invention, and to make the above-mentioned purpose, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings of the embodiments.

[0023] Such as figure 1 As shown, the aluminum profile oxidation process includes steps such as degreasing, alkali washing, neutralization, oxidation, coloring and sealing. The present invention provides a method for treating various waste water generated in the above steps, which includes the following steps:

[0024] 1) Use a nickel recovery device to recover nickel from the wastewater generated in the coloring step. The waste water in the coloring and cleaning waste water tank is pumped into the precision filter (also known as security filter, which is a common equipment for filtering, clarifyin...

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Abstract

The invention provides a waste water treating method in an aluminum section bar oxidizing technology, wherein the method comprises the treatment steps of waste water containing acids, alkalis and heavy metals: coagulating, deposing, filtrating, ultrafiltrating and nanofiltrating waste water containing no heavy metals, acids and alkalis, directly reusing the reclaimed water after treatment, and integrally utilizing the sludge generated in a production line after dehydrated; and (2) individually treating the waste water containing heavy metals by a recovery device, directly backflowing the treated and recovered heavy metals into a coloring tank and a hole sealing tank, and directly supplementing the fresh water obtained after treatment into a rinsing bath. The waste water treatment method of the invention has advantages of water cyclic utilization, small waste water discharge, integration utilization of sludge, no dangerous waste generation, etc.

Description

technical field [0001] The invention relates to a wastewater treatment method, in particular to a treatment method for aluminum profile oxidation wastewater. Background technique [0002] Anodizing is the most commonly used surface treatment technology for aluminum alloys. After surface oxidation, aluminum alloys have a high surface porosity, strong adsorption, easy staining, and easy pollution. Therefore, sealing treatment is required immediately after oxidation. At present, the aluminum profile oxidation process usually includes "degreasing-alkali washing-neutralization-oxidation-coloring-sealing" and other processes, in which the colorant and sealing agent used contain heavy metals such as nickel, and the coloring tank and sealing tank The final cleaning wastewater contains a large amount of heavy metals, and other processes will also produce a large amount of cleaning wastewater containing acids and alkalis. The traditional wastewater treatment process is to bring all t...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F11/12C02F1/00C25D11/18
Inventor 吴玉明
Owner 苏州万科环境工程有限公司
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