Preparation and application method of heavy metal sludge stabilizer

A technology of heavy metal sludge and its application method, which is applied in the direction of sludge treatment, chemical instruments and methods, water/sludge/sewage treatment, etc. It can solve the problems of unfavorable industrial disposal, large solidification volume ratio, and large dosage of chemicals and other issues, to achieve the effect of stable operation, low cost, and short disposal cycle

Inactive Publication Date: 2017-11-28
云南大地绿坤环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Patent CN106587550A discloses a high-efficiency heavy metal sludge treatment agent, which mixes glutamine, sodium bentonite, methylparaben, biogas residue, edible fungus leftovers and bentonite, and then extrudes them into particles with a diameter of 2 mm. The particles are mixed evenly with activated carbon, polydimethyldiallyl ammonium chloride, p-chloromethylbenzoic acid, 2-aminopyridine-4-methanol, and ferrous sulfate, and then treated with ultrasonic oscillation. The power of ultrasonic oscillation is 300-600W, the time is 50-60 minutes, put it at a temperature of 4°C and dry it at a low temperature for granulation to o

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

0.05L

[0023] Remarks: L in the table means lower than the detection limit, the same below.

[0024] Utilize method of the present invention to process this sludge:

[0025] Stabilizer preparation: weigh by mass percentage, fly ash 45%, carbide slag 10%, ferric chloride 40%, water glass 5%, mix evenly to obtain the stabilizer.

[0026] The heavy metal sludge and water are mixed according to the solid-to-liquid ratio of 1:0.6 to make a slurry, then 12% of the total weight of the sludge is added with a stabilizer, and the stirring reaction is carried out for 15 minutes; finally, 8% cement is added to solidify, and the solidified body is cured for 3 days .

[0027] Detection Indicator

Embodiment 2

1.16

[0030] Utilize method of the present invention to process this sludge:

[0031] Stabilizer preparation: weighed by mass percentage, phosphorus slag 10%, slag 30%, phosphogypsum 15%, sodium sulfide 25%, polyferric chloride 15%, triethanolamine 3%, anion PAM 2%, mix evenly to get The stabilizer.

[0032] The heavy metal sludge and water were stirred according to the solid-to-liquid ratio of 1:0.7 to obtain a slurry, and the pH of the slurry was adjusted to 8.5 by adding waste acid, and then a stabilizer was added according to 18% of the total weight of the sludge, and the reaction was stirred for 20 minutes; finally, 15 % cement is solidified, and the cured body is cured for 7 days.

[0033] Detection Indicator

Embodiment 3

0.34

[0036] Utilize method of the present invention to process this sludge:

[0037] Stabilizer preparation: weigh by mass percentage, fly ash 40%, carbide slag 15%, clay 10%, polyferric sulfate 30%, anion PAM 5%, mix evenly to obtain the stabilizer.

[0038] Stir the heavy metal sludge and water according to the solid-to-liquid ratio of 1:0.8 to make a slurry, add lime to adjust the pH of the slurry to 7.0, then add a stabilizer according to 15% of the total weight of the sludge, and stir for 10 minutes; finally add 6% The cement is cured, and the cured body is cured for 3 days.

[0039] Detection Indicator

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PUM

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Abstract

The invention relates to a preparation and application method of a heavy metal sludge stabilizer. The preparation and application method of the heavy metal sludge stabilizer belongs to the technical field of dangerous waste treatment, and comprises the following steps of (1) a preparation method: according to the mass percent, preparing 10 to 50 percent of aggregate, 5 to 40 percent of precipitator, and 1 to 10 percent of additive; (2) an application method: stirring heavy metal sludge and water into slurry, meanwhile, using inorganic acid or inorganic base for adjusting pH of the slurry, adding 5 percent to 20 percent of stabilizer of the step (1), uniformly stirring, then adding a curing agent, and detecting after maintaining. According to the method provided by the invention, the preparation of the stabilizer and the treatment of the sludge are operated at normal temperature and normal pressure, the process is simple, a solidified body leaching agent meets a dangerous waste landfilling admission standard (GB 18598-2001), and an operation effect is stable; the aggregate of the stabilizer is industrial solid waste, the waste is used for treating the waste, the cost is low, and the aims of minimization, reclamation and harmlessness of the dangerous waste treatment are truly achieved.

Description

technical field [0001] The invention belongs to the technical field of harmless treatment of hazardous waste, and in particular relates to a treatment method and application of heavy metal sludge. Background technique [0002] Heavy metal pollution mainly comes from industrial pollution, especially during mineral mining, smelting, and processing. Lead storage battery industry, leather and its products industry, chemical raw material and chemical product manufacturing industry, etc. The prevention and control areas are mainly Inner Mongolia, Jiangsu, Zhejiang, Jiangxi, Henan, Hubei, Hunan, Guangdong, Guangxi, Sichuan, Yunnan, Shaanxi, Gansu, Qinghai 14 other provinces. Heavy metal pollution has a wide range, long duration, strong pollution concealment, non-biodegradable but accumulative, and can be continuously enriched in organisms through the food chain, and can even be converted into more toxic methyl compounds, which have a great impact on the food chain. Some organisms...

Claims

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Application Information

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IPC IPC(8): C02F11/00C02F101/20
CPCC02F11/00C02F2101/20
Inventor 任雪娇李晨曦字银翠张卫东李超
Owner 云南大地绿坤环保科技有限公司
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