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Method for manufacturing desulfurization denitration activated carbon by using waste activated carbon

A desulfurization, denitrification, activated carbon technology, applied in the direction of energy input, can solve the problems of low recovery efficiency and low combustion calorific value in the recovery process, save energy and time consumption, improve economic, environmental and social benefits. Effect

Inactive Publication Date: 2016-08-17
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 denitration activated carbon by using waste activated carbon
  • Method for manufacturing desulfurization denitration activated carbon by using waste activated carbon
  • Method for manufacturing desulfurization denitration activated carbon by using waste activated carbon

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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

The invention discloses a method for manufacturing desulfurization denitration activated carbon by using waste activated carbon. The method comprises the steps of grinding, mixing, pelleting, drying and regeneration. In the step of grinding, waste carbon is ground into powder, and the through put of the powder passing through a sieve of 180-240 meshes according to the grain fineness is 98%; in the step of mixing, 68-80% of waste activated carbon, 18-30% of tar and 2% of potassium hydroxide or magnesium oxide are prepared in percentage by weight; in the step of pelleting, the carbon paste is prepared into particles of which the particle diameter is 2-10mm; in the step of drying, the cylindrical particles are dried; and in the step of regeneration, the waste activated carbon cylindrical particles are added into an internal-heated rotary furnace for heating without air, the temperature is controlled between 820 and 900 DEG C, the time is 30-40 minutes, and water vapor is introduced into the furnace. According to the method, a powdery waste activated carbon source can be recycled, and can be recycled for four times or more after being treated by the process provided by the invention, and finally, the carbon with too high ash content can be recycled 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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IPC IPC(8): C01B31/08
CPCY02P20/129
Inventor 王岗李屹
Owner LICHENG LANTIAN GAS DEV
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