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Method for preparing carbon material from flocculated sludge and dye hazardous wastes, and carbon material

A technology for carbon materials and dyes, which is applied in carbon preparation/purification, chemical instruments and methods, flocculation/precipitation water/sewage treatment, etc., can solve the problems of volume reduction, secondary air pollution, large investment, etc., and achieve economical protection. The effect of generating income and protecting the environment

Inactive Publication Date: 2018-07-10
SHIHEZI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Flocculation sludge can generally be disposed of safely by landfill, but this method will occupy a large amount of land resources, site treatment and anti-seepage construction are not easy to meet the standards, improper collection and control of leachate may cause secondary pollution of the soil; flocculation sludge also Reduction and harmlessness can be achieved through incineration, which is an important means other than landfill
This method is a comprehensive process of pyrolysis and deep oxidation. Combustible solid waste can be oxidized and decomposed through incineration to reduce volume, remove toxicity, and recycle waste heat. The main disadvantage of the incineration method is that it requires a large investment and emits smoke during the incineration process. Cause secondary air pollution, and equipment corrosion is serious

Method used

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  • Method for preparing carbon material from flocculated sludge and dye hazardous wastes, and carbon material
  • Method for preparing carbon material from flocculated sludge and dye hazardous wastes, and carbon material
  • Method for preparing carbon material from flocculated sludge and dye hazardous wastes, and carbon material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Embodiment 1: The embodiment of the present invention discloses a method for preparing carbon materials by using flocculation sludge and hazardous dye waste, including the following steps:

[0050] Step d: the dye wastewater comes from a local printing and dyeing enterprise, take 5L dye wastewater, the dye concentration is 200ppm during flocculation, adjust the solution pH=9; add cationic flocculant BADT-CTS (2,4-bis(dimethylammonium) -6-Chloro-[1,3,5]-triazine-based chitosan ether, the flocculant concentration is controlled at 9g / L, let it stand for a day, remove the upper liquid, and centrifuge the lower solid to accelerate solid-liquid separation. The rotational speed was 4500 rpm, and the centrifugation time was 12 minutes to obtain solid flocs.

[0051] Step a: Dry the solid flocs obtained in step d at 100°C for 42 hours, grind them into 120-mesh powder, and dry them in vacuum at 65°C for 8 hours to obtain dry flocculated sludge;

[0052] Inject high-concentration...

Embodiment 2

[0057] Embodiment 2: The embodiment of the present invention discloses a carbon material prepared by using flocculation sludge and dye hazardous waste. The preparation method includes the following steps:

[0058] Step d: the dye wastewater comes from a local printing and dyeing enterprise, take 5L dye wastewater, the dye concentration is 200ppm during flocculation, adjust the solution pH=9; add cationic flocculant BADT-CTS (2,4-bis(dimethylammonium) -6-Chloro-[1,3,5]-triazine-based chitosan ether, the flocculant concentration is controlled at 9g / L, let it stand for a day, remove the upper liquid, and centrifuge the lower solid to accelerate solid-liquid separation. The rotational speed was 4500 rpm, and the centrifugation time was 12 minutes to obtain solid flocs.

[0059] Step a: Dry the solid flocs obtained in step d at 100°C for 42 hours, grind them into 120-mesh powder, and dry them in vacuum at 65°C for 8 hours to obtain dry flocculated sludge;

[0060] Inject high-conc...

Embodiment 3

[0076] Embodiment 3: The embodiment of the present invention discloses a method for preparing carbon materials by using flocculation sludge and hazardous dye waste, including the following steps:

[0077] Step d: The dye wastewater comes from a local printing and dyeing enterprise. Take 5L of dye wastewater. When flocculating, the dye concentration is 700ppm, and the pH of the solution is adjusted to 7.5; add cationic flocculant BADT-CTS (2,4-bis(dimethylammonia) -6-Chloro-[1,3,5]-triazine-based chitosan ether, the flocculant concentration is controlled at 13g / L, let it stand for a day, remove the upper liquid, and centrifuge the lower solid to accelerate solid-liquid separation. The rotational speed was 4000 rpm, and the centrifugation time was 15 minutes to obtain solid flocs.

[0078] Step a: The solid flocs obtained in step d are air-dried at 105°C for 46 hours, ground into 140-mesh powder, and vacuum-dried at 80°C for 10 hours to obtain dry flocculated sludge;

[0079] I...

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Abstract

The invention discloses a method for preparing a carbon material from flocculated sludge and dye hazardous wastes, and a carbon material. The method comprises a: flocculating to precipitate printing and dyeing wastewater to obtain flocs, drying the flocs to obtain dry flocculated sludge, injecting the dyeing wastewater into a spray drying tower, carrying out drying to obtain dye hazardous waste powder, mixing the flocs and the dye hazardous waste powder, carrying out crushing, carrying out screening and carrying out vacuum treatment, b: carrying out pyrolysis on the flocs and the dye hazardouswastes, and c: carrying out ball milling on the black solids obtained by pyrolysis to obtain powder, adding deionized water into the powder, carrying out stirring, carrying out suction filtering through a plate-frame suction filter, repeatedly carrying out water washing and carrying out vacuum drying to obtain the carbon material. The flocculated sludge and dye hazardous waste in the treated industrial wastewater containing dye are used as pyrolysis precursors and the pyrolysis precursors are subjected to pyrolysis so that the nitrogen-doped carbon material is obtained. The method transformsthe flocculated sludge and hazardous wastes into the carbon material with a high added value, changes wastes into valuables and realizes environmental protection and economic income generation.

Description

technical field [0001] The invention relates to the technical field of printing and dyeing wastewater treatment, in particular to a method for preparing carbon materials by using flocculation sludge and hazardous dye waste and the carbon materials. Background technique [0002] Printing and dyeing wastewater is wastewater discharged from printing and dyeing factories that mainly process cotton, hemp, chemical fibers and their blended products. Printing and dyeing wastewater has a large amount of water, 100-200 tons of water is consumed per ton of textile printing and dyeing, of which 80-90% becomes wastewater. Textile printing and dyeing wastewater has the characteristics of large water volume, high content of organic pollutants, high alkalinity, and large changes in water quality. It is one of the most difficult industrial wastewater to treat. , fiber impurities, sand substances, inorganic salts, etc. [0003] At present, industrial wastewater treatment mainly includes ph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05C01B32/318H01G11/32H01G11/86B01J21/18C02F1/56C02F103/30
CPCB01J21/18C02F1/56C02F2103/30H01G11/32H01G11/86Y02E60/13
Inventor 史玉琳伍亮郭旭虹魏婷婷牛牧川陈龙贾鑫
Owner SHIHEZI UNIVERSITY
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