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Method for preparing carbon material from flocculated sludge and petroleum coke and carbon material

A technology of petroleum coke and carbon materials, applied in the field of printing and dyeing wastewater treatment, can solve the problems of secondary pollution of the atmosphere, volume reduction, improper collection and control of leachate, etc., and achieve the effect of protecting the environment and protecting the economy and generating income

Pending Publication Date: 2018-07-27
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 petroleum coke and carbon material
  • Method for preparing carbon material from flocculated sludge and petroleum coke and carbon material
  • Method for preparing carbon material from flocculated sludge and petroleum coke and carbon material

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Embodiment 1

[0040] Embodiment 1: The embodiment of the present invention discloses a method for preparing carbon materials by using flocculation sludge and petroleum coke, including the following steps:

[0041] Step d: The dye wastewater comes from a local printing and dyeing enterprise. Take 5L of dye wastewater. When flocculating, the dye concentration is 200ppm, and the pH of the solution is adjusted to 8.5; 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 15 minutes to obtain solid flocs.

[0042] Step a: Dry the solid flocs obtained in step d by blasting at 100°C for 45 hours, grind them into 120-mesh powder, and dry them in vacuum at 60°C for 6 hours to obtain dry flocculated sludge; take ...

Embodiment 2

[0046] Embodiment 2: The embodiment of the present invention discloses a carbon material prepared by using flocculation sludge and petroleum coke, and its preparation method includes the following steps:

[0047] Step d: The dye wastewater comes from a local printing and dyeing enterprise. Take 5L of dye wastewater. When flocculating, the dye concentration is 200ppm, and the pH of the solution is adjusted to 8.5; 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 15 minutes to obtain solid flocs.

[0048] Step a: Dry the solid flocs obtained in step d by blasting at 100°C for 45 hours, grind them into 120-mesh powder, and dry them in vacuum at 60°C for 6 hours to obtain dry flocculated ...

Embodiment 3

[0060] Embodiment 3: The embodiment of the present invention discloses a method for preparing carbon materials using flocculation sludge and petroleum coke, including the following steps:

[0061] Step d: The dye wastewater comes from a local printing and dyeing enterprise. Take 5L of dye wastewater. When flocculating, the dye concentration is 500ppm, and the pH of the solution is adjusted to 7.5; add cationic flocculant BADT-CTS (2,4-bis(dimethylammonium) -6-Chloro-[1,3,5]-triazine-based chitosan ether, the flocculant concentration is controlled at 12g / L, let it stand for a day, remove the upper liquid, and centrifuge the lower solid to accelerate solid-liquid separation, centrifuge The rotational speed was 4200 rpm, and the centrifugation time was 12 minutes to obtain solid flocs.

[0062] Step a: The solid flocs obtained in step d are air-dried at 105°C for 42 hours, ground into 110-mesh powder, and vacuum-dried at 75°C for 8 hours to obtain dry flocculated sludge; take 100...

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Abstract

The invention discloses a method for preparing a carbon material from flocculated sludge and petroleum coke and the carbon material. The method comprises the following steps: a, drying flocs obtainedby flocculating and precipitating printing and dyeing wastewater to obtain dried flocculated sludge, mixing the dried flocculated sludge with the petroleum coke, and performing pulverizing, sieving and vacuum treatment; b, pyrolyzing the mixture of the vacuum treated dry flocculated sludge and petroleum coke; c, performing ball milling on a black solid obtained by pyrolyzing the mixture of flocs and petroleum coke into powder, adding the powder to a stirring kettle filled with deionized water for stirring, performing suction filtration by a plate-and-frame filter, performing washing repeatedlywith water until pH of a filtrate is 6-8, and finally performing vacuum drying to obtain the carbon material. The method and the carbon material have the beneficial effects that the petroleum coke and the flocculated sludge after treatment of industrial wastewater containing dye can be compounded as a pyrolysis precursor, and a nitrogen-doped carbon material is obtained by pyrolysis. Waste is turned into wealth, and accordingly, a balance between environmental protection and economic income generation is achieved.

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 petroleum coke 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 physica...

Claims

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Application Information

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IPC IPC(8): C01B32/05
CPCC01B32/05
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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