Process for preparing coal-based agglomerated activated carbon

A preparation process, activated carbon technology, applied in inorganic chemistry, non-metallic elements, carbon compounds, etc., can solve the problems of ensuring product strength and bulk specific gravity, high vitrinite composition, poor adhesion, etc., to speed up the activation reaction speed, reduce Dosage, effect of reducing swelling and coking

Inactive Publication Date: 2011-07-20
SHENHUA XINJIANG ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, when non-caking coal is used as raw material, the coal-based briquette activated carbon produced often cannot guarantee product strength and stacking specific gravity on the basis of satisfying its adsorption (iodine value), so few people use non-caking coal as raw material to produce coal-based briquette activated carbon. block activated carbon
The non-caking coal produced by Xinjiang Kuanggou Coal Mine has the characteristics of high vitrinite component and low ash content, and is an excellent raw material for coal-based briquetted activated carbon from some indicators; but due to its poor cohesiveness, it has not yet been Someone used it as a raw material to develop high-strength coal-based briquette activated carbon

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) clean and dry the raw materials respectively, select and remove impurities such as gangue and coal slime, then take by weighing 80kg of wide-groove non-sticky coal and 20kg of gas-fertilized coal;

[0040] (2) The raw materials weighed in the step (1) are mixed, and the medium-speed mill is used to grind the powder. The 325 mesh sieve pass rate of coal powder is about 86%, and the 180 mesh sieve pass rate is about 91%; Use 80°C hot air + nitrogen (volume ratio: 2:1) to dry coal powder; this drying process can fully contact the heat source and coal powder, and evaporate part of the water in the raw coal; add nitrogen at the same time to avoid the risk of dust explosion . Final pulverized coal moisture control <2%.

[0041] (3) The pulverized coal obtained in the step (2) is formed by a double-roller briquetting machine, the linear pressure between the double-rollers reaches 5t / cm, the temperature of the briquetting machine is controlled at 60°C, and the pulverized c...

Embodiment 2

[0048] (1) clean and dry the raw materials respectively, select and remove impurities such as gangue and coal slime, then take by weighing 60kg of wide-ditch non-sticky coal and 40kg of gas-fertilized coal;

[0049] (2) Mix the raw materials taken in step (1), and use a medium-speed mill to grind, the 325 mesh sieve pass rate of coal powder is about 81%, and the 180 mesh sieve pass rate is about 90%; Use 100°C hot air + nitrogen (volume ratio 2.2:1) to dry coal powder; this drying process can fully contact the heat source and coal powder, and evaporate part of the water in the raw coal; add nitrogen at the same time to avoid the risk of dust explosion . Final pulverized coal moisture control <2%.

[0050] (3) The pulverized coal obtained in the step (2) is formed by a double-roll briquetting machine, and the linear pressure between the double-rollers reaches 9t / cm, and the temperature of the briquetting machine is controlled at 70°C. After the pulverized coal is formed, it is...

Embodiment 3

[0057] (1) clean and dry the raw materials respectively, select and remove impurities such as gangue and coal slime, then take by weighing 70kg of wide-groove non-stick coal and 30kg of gas-fertilized coal;

[0058] (2) Mix the raw materials taken in step (1), and use a medium-speed mill to grind, the 325 mesh sieve pass rate of coal powder is about 88%, and the 180 mesh sieve pass rate is about 95%; Use 125°C hot air + nitrogen (volume ratio: 2:1) to dry coal powder; this drying process can fully contact the heat source and coal powder, and evaporate part of the water in the raw coal; add nitrogen at the same time to avoid the risk of dust explosion . Final pulverized coal moisture control <2%.

[0059] (3) The pulverized coal obtained in the step (2) is formed by a double-roller briquetting machine, the linear pressure between the double-rollers reaches 12t / cm, the temperature of the briquetting machine is controlled at 85°C, and the pulverized coal is called a briquetting ...

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Abstract

The invention discloses a process for preparing coal-based agglomerated activated carbon. The process has the following beneficial effects: the non-caking coal produced in the wide ditches is taken as a main raw material; the special caking coal type, namely gas-fat coal, is blended in the coal blending procedure; furthermore, the oxidation procedure is added in the process; the process parameters such as pulverized coal particle distribution, forming pressure, coal activation temperature and time and the like in the general production process are adjusted; at the same time, the slow carbonization technology is used instead of the traditional rapid carbonization procedure; and oxygen-enriched air is fed into activation equipment. The coal-based activated carbon prepared by the process can ensure the product strength and bulk density on the basis of satisfying the iodine adsorption of the activated carbon and is better in industrial application value.

Description

technical field [0001] The invention relates to a process for preparing activated carbon, in particular to a process for preparing coal-based briquette activated carbon with wide-groove non-caking coal. Background technique [0002] Coal-based activated carbon is a new type of activated carbon product. Raw coal with certain cohesiveness is mostly used as raw material for its production, or a binder is added to raw coal as raw material, and coal-based briquetted activated carbon is produced through grinding, briquetting, carbonization, and activation processes. At present, there are only a few enterprises in China that use long-flame coal as raw material to produce briquetted activated carbon. [0003] However, when non-caking coal is used as raw material, the coal-based briquette activated carbon produced often cannot guarantee product strength and stacking specific gravity on the basis of satisfying its adsorption (iodine value), so few people use non-caking coal as raw ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/08C01B31/14C01B32/384
Inventor 冀占成韩晓林马彦威
Owner SHENHUA XINJIANG ENERGY
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