Method for manufacturing desulfurization and denitrification activated carbon from waste activated carbon

A desulfurization and denitrification, activated carbon technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of low combustion calorific value, low recovery efficiency of recovery process, etc., and achieve the goal of improving economic benefits, saving energy and time Unified effect of consumption, environmental benefit and social benefit

Inactive Publication Date: 2018-03-20
LICHENG LANTIAN GAS DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, during the operation of the adsorption equipment, due to friction between particles or friction with adjacent equipment or substances, a large amount of powdery waste activated carbon will be produced. Usually these powdery waste activated carbons are treated as solid waste, or when the fuel is burned, the combustion heat The value is very low, less than 3000 kcal, and the recovery efficiency of the existing recycling process is not high

Method used

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  • Method for manufacturing desulfurization and denitrification activated carbon from waste activated carbon
  • Method for manufacturing desulfurization and denitrification activated carbon from waste activated carbon
  • Method for manufacturing desulfurization and denitrification activated carbon from waste activated carbon

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Experimental program
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Effect test

Embodiment 1

[0075] The desulfurization and denitrification activated carbon in the present embodiment is made of powdery waste activated carbon, tar and water, and its weight percentage is:

[0076] Powdered waste activated carbon 70%; tar 23%; potassium hydroxide or magnesium oxide 2%; water 5%. The tar here adopts high-temperature coal tar.

[0077] The preparation method of above-mentioned gac is: it comprises the following steps:

[0078] 1), preparation of raw materials: grinding into 200 mesh powdered waste activated carbon;

[0079] 2), preparation of tar: first adjust the temperature of the tar to 55°C, then stir evenly, then prepare the tar into a mixed tar with a bitumen content of 50% and keep its temperature at 55°C;

[0080] 3), making charcoal paste: add the prepared powdery waste activated carbon, prepared tar, potassium hydroxide or magnesium oxide and water into the mixer according to the above weight percentage and stir evenly to make charcoal paste;

[0081] 4) Formi...

Embodiment 2

[0085] The desulfurization and denitrification activated carbon in the present embodiment is made of powdery waste activated carbon, tar and water, and its weight percentage is:

[0086] Powdered waste activated carbon 75%; tar 15%; water 8%; potassium hydroxide or magnesium oxide 2%. Coal tar adopts high temperature coal tar.

[0087] The preparation method of above-mentioned gac is: it comprises the following steps:

[0088] 1), preparation of raw materials: grinding into 240 mesh powdered waste activated carbon;

[0089] 2), preparation of tar: first adjust the temperature of the tar to 50°C, then stir evenly, then prepare the tar into a mixed tar with a bitumen content of 60% and keep its temperature at 50°C;

[0090] 3), making charcoal paste: add the prepared powdery waste activated carbon, prepared tar, potassium hydroxide or magnesium oxide and water into the mixer according to the above weight percentage and stir evenly to make charcoal paste;

[0091] 4) Forming a...

Embodiment 3

[0095] The desulfurization and denitrification activated carbon in the present embodiment is made of powdery waste activated carbon, tar and water, and its weight percentage is:

[0096] 5% bituminous coal, 68% waste activated carbon, 5% asphalt, 8% coking coal, 2% potassium hydroxide or magnesium oxide and 12% tar.

[0097]Coking coal from Qinyuan, Xiangyuan and other places is used, and the caking index is required to be 75-95; bituminous coal is Jurassic long-flame coal, high-temperature coal tar, and coal-modified asphalt.

[0098] The preparation method of above-mentioned gac is: it comprises the following steps:

[0099] 1), preparation of raw materials: firstly crush bituminous coal and coking coal into coal lumps smaller than 12mm respectively, then mix bituminous coal and coking coal according to the above weight percentage, and then grind together with powdery waste activated carbon into 220-mesh powder;

[0100] 2), preparation of tar: first adjust the temperature ...

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Abstract

A method for manufacturing desulfurization and denitrification activated carbon by utilizing waste activated carbon, comprising a grinding step, a mixing step, a granulation step, a drying step and a regeneration step. In the grinding step, the waste carbon is ground, and the fineness of the particles is 98% according to the 180 to 240 mesh sieve; in the mixing step, 68% to 80% of waste activated carbon, 18% to 30% of tar and potassium hydroxide are prepared by weight. Or magnesium oxide 2%; In the granulation step, the above-mentioned charcoal paste is made into particles with a particle diameter of 2 to 10 mm; in the drying step, the above-mentioned cylindrical particles are dried; The converter is heated with air isolation, the temperature is controlled at 820 to 900 degrees Celsius, and the time is 30 to 40 minutes, and steam is introduced. The powdery waste activated carbon can be used as a resource, and it can be recycled more than four times after being treated by this process. Finally, the carbon with too high ash content can be reused as sewage treatment carbon.

Description

technical field [0001] The present invention generally relates to a waste activated carbon regeneration technology, in particular to a method for manufacturing desulfurization and denitrification activated carbon from waste activated carbon. Background technique [0002] In the prior art, activated carbon adsorption equipment used for tail gas treatment, such as activated carbon adsorption equipment for sintering of iron and steel plants or tail gas treatment of non-ferrous metallurgy, uses a large amount of granular activated carbon, and these granular activated carbons can be regenerated by desorption process. However, during the operation of the adsorption equipment, due to friction between particles or friction with adjacent equipment or substances, a large amount of powdery waste activated carbon will be produced. Usually these powdery waste activated carbons are treated as solid waste, or when the fuel is burned, the combustion heat The value is very low, less than 300...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/36
CPCY02P20/129
Inventor 王岗李屹
Owner LICHENG LANTIAN GAS DEV
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