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Treatment method for extra-high-concentration acid waste liquid

A technology for acid waste liquid and treatment methods, applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., to achieve low investment and transformation costs, intelligent automatic control of production management, and realization of production management Effect

Inactive Publication Date: 2013-10-09
云南江豪科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

All smelting enterprises have arsenic removal system

Method used

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  • Treatment method for extra-high-concentration acid waste liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1) Collect high-concentration acidic waste liquid with pH 1.52 and conductivity of 76000μs / cm into the regulating tank, detect the content of total arsenic in the acidic waste liquid, and detect that the arsenic content is less than 0.1g / L, and then enter the acidic waste liquid into the stirring tank;

[0031] 2) Use a crushing device to crush the lead oxide ore with a lead content of 46.5%, and then use a grinding device to grind it to a fine powder with a diameter of 0.18--0.1mm;

[0032] 3) Put the ground lead oxide ore or smelting lead plaster slag fine powder into the mixing pool at a ratio of 48% by weight of the acidic waste liquid to mix it with the acidic waste liquid in the pool, start the mixer to stir for 20-35 minutes, and monitor the pH value Precipitate after rising to 5.2-6.2;

[0033] 4) When the mixed liquid in the stirring tank settles for 30 to 60 minutes, take the supernatant in the tank and import it into the clarification tank, and transport the ...

Embodiment 2

[0039] 1) Collect high-concentration acidic waste liquid with pH 1.08 and conductivity 101500μs / cm into the regulating tank, detect the content of total arsenic in the acidic waste liquid, and detect that the arsenic content is less than 0.1g / L, and then enter the acidic waste liquid into the stirring tank;

[0040] 2) Pulverize the lead oxide ore with a lead content of 52% with a crushing device, and then use a grinding device to grind it to a fine powder with a diameter of 0.18--0.1mm;

[0041] 3) Put the ground lead oxide ore or smelting lead plaster slag fine powder into the mixing tank according to the weight of 60% of the acid waste liquid, mix it with the acid waste liquid in the pool, start the mixer to stir for 20-35 minutes, and monitor the pH value Rise to 5.5 ~ 6.5 precipitation;

[0042] Steps 4), 5), 6), 7), and 8) are the same as in Example 1.

Embodiment 3

[0044] 1) Collect high-concentration acid waste liquid with pH 1.2 and conductivity 85700μs / cm into the regulating tank, detect the content of total arsenic in the acid waste liquid, and detect that the arsenic content is less than 0.1g / L, and then enter the acid waste liquid into the stirring tank;

[0045] 2) Use a crushing device to crush the lead oxide ore with a lead content of 38%, and then use a grinding device to grind it to a fine powder with a diameter of 0.18--0.1mm;

[0046] 3) Put the ground lead oxide ore or smelting lead plaster slag fine powder into the stirring tank according to the weight of 70% of the acid waste liquid, mix it with the acid waste liquid in the pool, start the mixer to stir for 20-35 minutes, and monitor the pH value Precipitation after rising to 5.5-6.5;

[0047] Steps 4), 5), 6), 7), and 8) are the same as in Example 1.

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Abstract

The invention discloses a treatment method for extra-high-concentration acid waste liquid, and the method comprises the following steps of: leading high-concentration acid waste liquid with a total arsenic content of less than 0.1 g / L to a mixing pool, crushing lead oxide ores or smelted lead plaster residues with a lead content of 30-60%, and then grinding the obtained object to fine powder with a diameter of 0.18 -- 0.1 mm; feeding the ground lead oxide ore or smelted lead plaster residue fine powder into the mixing pool in a proportion that the weight of the fine powder accounts for 30-70% of the weight of the acid waste liquid, mixing the obtained mixture 20-35 minutes, and after monitoring that the pH value rises to 5.5-6.5, carrying out precipitation on the obtained mixture; leading supernatant fluid to a clarification tank, carrying out further treatment on an obtained solid, enabling water in the clarification tank to pass through a filtration system so as to remove tiny particles and suspended impurities in the water, feeding the obtained object into a multi-effect evaporation system to carry out evaporation treatment, and carrying out condensation on the obtained product so as to obtain distilled water. According to the invention, the gypsum waste residue pollution caused by lime adding in the conventional process is avoided, and treated water can be directly re-applied to the production process of an enterprise and no wastewater is drained to the outside, thereby reducing the investment cost and operation cost of treating acid waste liquid by enterprises, and fully realizing the zero discharge of acid waste liquid of smelting enterprises.

Description

[0001] technical field [0002] The invention relates to a treatment method for ultra-high concentration acidic waste liquid. Background technique [0003] During the production process of the smelting industry, a large amount of acidic waste liquid will be produced. Its composition is complex and changeable. The pH value of acid waste liquid is even as low as below 1, which is extremely corrosive, and contains a large amount of heavy metals and other pollutants, such as lead, zinc, cadmium, copper, arsenic, fluorine, chlorine, etc., and is a harmful to the environment. Very destructive industrial waste liquid. [0004] At present, the lime neutralization method is basically adopted to treat such high-concentration acidic waste liquid, that is, adding lime substances several times, raising the pH value of the dirty acid to neutral, and then adjusting it to about 10-11. deal with. [0005] The use of lime neutralization process to treat high-concentration acidic waste liq...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10
Inventor 蒋嵩谢小艳
Owner 云南江豪科技有限公司