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Introduction of aluminous profile surface treatment wastewater treatment technology

Introduction of aluminous profile surface treatment wastewater treatment technology

2020-11-12

The nominal treatment of aluminum profile water consumption, more waste water, waste water in the continuous discharge of harmful substances.

Aluminum alloy profile industry is the most widely used non-ferrous metal structural materials in aviation, aerospace, automotive, machinery manufacturing, shipping, construction, decoration.

If left untreated, it will contaminate the environment.

At the same time along with our country to discharge the amount of tax, will also increase the cost of enterprises and burdensome.

Therefore, considering the social obligation and benefit of enterprises, it is necessary and necessary to treat wastewater.


1. Sources and varieties of wastewater from nominal treatment of aluminum profiles:


Answer: the name of the aluminum processing wastewater pretreatment of oil removal and after acid washing water, alkali decay after alkaline washing water, acid corrosion after acid washing water, after the oxidation of acid washing water, containing Ni2 +, Sn2 + after coloring, acid washing water, electrophoresis paint produced by ion exchange device with a small amount of waste acid, waste alkali electrophoresis paint waste water.

Aluminum alloy profile industry is the most widely used non-ferrous metal structural materials in aviation, aerospace, automotive, machinery manufacturing, shipping, construction, decoration.

The wastewater was acidic after confusion, containing cations such as Al3+, Ni2+, Sn2+, Sn4+, Na+, Cr3+, anions such as SO42-, F-, NO3-, Cl-, AlO2-, and Ac-, as well as organics such as nominal active agent and acrylonic acid resin.

Waste liquids include waste sulfuric acid produced by degreasing medium, waste nitric acid and waste sulfuric acid produced by oxidation, waste liquid produced by coloring, waste acrylic acid produced by electrophoresis paint, and waste liquid containing Ni2+ and F-- produced by hole sealing.

2. Measures to reduce the discharge of waste water and liquid:


A: The way to reduce waste water and waste liquid is reasonable control water time and control charge Angle to reduce the amount of liquid out of the tank, as far as possible to take two - and three-stage countercurrent rinse, reduce water consumption.

Aluminum alloy profile industry is the most widely used non-ferrous metal structural materials in aviation, aerospace, automotive, machinery manufacturing, shipping, construction, decoration.

Water after acid etching and degreasing is used for washing after alkali decay and water after oxidation for acid etching and degreasing.

And in order to reduce or avoid bath wastewater and waste emissions, production line should be designed to use a variety of recycling equipment, such as acid recycling equipment, alkali corrosion recycling equipment, anodized aluminum removal equipment, coloring liquid RO recycling equipment, electrophoresis paint RO recovery unit, the use of these recovery unit can waste water consumption and waste emissions to a large extent, as well as larger limit landed production capital.

3. Principle and method of wastewater treatment of nominal aluminum profile:


A: The wastewater produced by the nominal treatment of aluminum profiles is, importantly, acid and alkali wastewater, containing a small amount of harmful anion such as Ni2+, Sn2+, F-, etc., the treatment method is acid and alkali medium heel.

The waste water is individually acidic, alkali should be added to the heel, adjust the PH value to about 7 ~ 8.5.

At the same time, cation Al3+, Ni2+, Sn2+, Cr3+ and so on all form hydroxide deposits in the middle and heel processes.

After with the accumulation of waste water pump into the agglutinate slot, at the same time with quantitative pump into the dissolving good polyamide agglutination floe agent with waste water, waste water into the accumulation tank, after the agglutination accumulation method has inclined plate accumulation method, air flotation, centrifugal accumulation method, it points out that the author or the centrifugal method using firmer, after accumulation, clear liquid discharge from upper part of the overflow mouth spilling out into the pool or reprocessing reservoir.

The waste water that passes afore-mentioned treatment may reach standard discharge, if want to undertake waste water reuse, right now waste water may pass coarse filter to fall behind to enter RO device to undertake processing, get rid of redundant anion, organic compound, right now water PH value may be low, after passing anion exchange device possibly adjust, achieve reuse standard.

The sludge generated by the accumulation is discharged into the sludge tank on schedule and then treated by the plate-type cake press or belt dewaterer into industrial waste residue and sent to the industrial waste residue treatment plant.






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