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Aluminum profile processing wastewater treatment process

A technology for aluminum profile processing and wastewater treatment, applied in metallurgical wastewater treatment, neutralized water/sewage treatment, water/sewage multi-stage treatment, etc. Low problems, to achieve the effect of improving the reuse rate, protecting the environment, and reducing the burden

Pending Publication Date: 2021-06-04
浙江乔老爷铝业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a treatment process for aluminum profile processing wastewater to solve the problem of low water reuse rate in wastewater treatment proposed in the above background technology, chromium and nickel ions are often not removed, resulting in serious discharge pollution, and waste water Alkali slag is produced after treatment, and the direct landfill not only pollutes the environment, but also wastes resources

Method used

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  • Aluminum profile processing wastewater treatment process
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Examples

Experimental program
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Effect test

Embodiment 1

[0040]A process for treating wastewater from processing aluminum profiles, comprising the following steps:

[0041] S1: the cleaning waste water of degreasing, alkali washing and pickling is mixed, and self-neutralization is carried out to obtain neutralized waste water;

[0042] S2: Add a regulator to the neutralized waste water to adjust the pH value after mixing, and generate precipitation at the same time; the cleaning waste water in the degreasing and pickling process is acidic, and the alkaline washing cleaning waste water is alkaline, control the displacement of the two parts so that they can be mixed and neutralized by themselves The final pH is close to neutral, and the pH value is detected by a pH value detector, and a regulator is added according to the value to control the pH value to 7-8. The regulator is the waste liquid of the alkali etching tank or NAOH solution in the alkali cleaning process, which is mixed by itself Postformation is mainly ALOH 3 The precipi...

Embodiment 2

[0049] A process for treating wastewater from processing aluminum profiles, comprising the following steps:

[0050] S1: the cleaning waste water of degreasing, alkali washing and pickling is mixed, and self-neutralization is carried out to obtain neutralized waste water;

[0051] S2: Add a regulator to the neutralized waste water to adjust the pH value after mixing, and generate precipitation at the same time; the cleaning waste water in the degreasing and pickling process is acidic, and the alkaline washing cleaning waste water is alkaline, control the displacement of the two parts so that they can be mixed and neutralized by themselves The final pH is close to neutral, and the pH value is detected by a pH value detector, and a regulator is added according to the value to control the pH value to 7-8. The regulator is the waste liquid of the alkali etching tank or NAOH solution in the alkali cleaning process, which is mixed by itself Postformation is mainly ALOH 3 The precip...

Embodiment 3

[0058] A process for treating wastewater from processing aluminum profiles, comprising the following steps:

[0059] S1: the cleaning waste water of degreasing, alkali washing and pickling is mixed, and self-neutralization is carried out to obtain neutralized waste water;

[0060] S2: Add a regulator to the neutralized waste water to adjust the pH value after mixing, and generate precipitation at the same time; the cleaning waste water in the degreasing and pickling process is acidic, and the alkaline washing cleaning waste water is alkaline, control the displacement of the two parts so that they can be mixed and neutralized by themselves The final pH is close to neutral, and the pH value is detected by a pH value detector, and a regulator is added according to the value to control the pH value to 7-8. The regulator is the waste liquid of the alkali etching tank or NAOH solution in the alkali cleaning process, which is mixed by itself Postformation is mainly ALOH 3 The precip...

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Abstract

The invention discloses an aluminum profile processing wastewater treatment process in the technical field of aluminum profile processing wastewater treatment, which comprises the following steps: mixing cleaning wastewater of deoiling, alkali washing and acid washing, and carrying out self-neutralization to obtain neutralized wastewater; adding a regulator into the neutralized wastewater to regulate the pH value of the mixed wastewater, and generating a precipitate at the same time; recycling upper-layer clear water in the step S1 and continuously taking as cleaning water, and filtering precipitates to serve as slag A; mixing cleaning wastewater of coloring, anodic oxidation and hole sealing, precipitating and removing slag to obtain upper-layer wastewater; adding quick lime, FeSO4 and NAOH into the upper-layer wastewater, adjusting the pH value, and carrying out a reaction to generate an aluminide; adding a flocculating agent to generate a precipitate, and filtering the precipitate as a slag B; mixing and drying the slag A and the slag B, carrying out water washing, adding a binding acid and calcining, so that activated aluminum oxide is obtained. The method has the advantages that water resources are saved, the reutilization rate is increased, Ni < + 2 > and Cr < + 3 > in water are removed, pollution is reduced, the waste slag can be recycled, and the environment is protected.

Description

technical field [0001] The invention relates to the technical field of aluminum profile processing wastewater treatment, in particular to a treatment process for aluminum profile processing wastewater. Background technique [0002] Aluminum alloy profiles for construction require high comprehensive performance such as corrosion resistance, weather resistance, wear resistance, good appearance decoration and long service life. Therefore, aluminum profiles are protected by electrostatic powder spraying and fluorocarbon resin paint coating. Before decoration, surface chemical conversion treatment must be carried out to improve the bonding force between the coating and the substrate and meet the high corrosion resistance requirements. During the treatment process, waste water containing high content of nickel and chromium will be generated, and the production is not environmentally friendly. [0003] The production process of aluminum profiles mainly includes degreasing, alkali e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C01F7/44B01J20/08C02F101/14C02F101/20C02F101/22C02F103/16
CPCC02F9/00C01F7/441B01J20/08C02F1/66C02F1/56C02F2101/14C02F2101/22C02F2101/20C02F2103/16
Inventor 乔冠男骆逍遥乔天冠陆玖龙田元新张谷锁邱明意
Owner 浙江乔老爷铝业有限公司
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