Preparation method of columnar bamboo activated carbon

An activated carbon and columnar technology, which is applied in the field of preparation of columnar bamboo activated carbon, can solve the problems of poor mechanical strength of bamboo activated carbon, affect the use of bamboo activated carbon, and complicated preparation process, so as to improve the gas atmosphere, ensure strength, and simple preparation process Effect

Active Publication Date: 2014-12-17
NINGXIA HUAHUI ACTIVATED CARBON
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Problems solved by technology

At the same time, there are still many deficiencies in the use of bamboo activated carbon. One is: due to the constraints of the existing activation equipment process, bamboo activated carbon is poor in mechanical strength, which affects the use of bamboo activated carbon; the other is: Compared with the gas activation method, the bamboo activated carbon prepared by the chemical activation method has a tedious preparation process, serious equipment corrosion, and serious environmental pollution. The finished carbon must be cleaned before it can be used.
Chinese patent publication number is that CN1128100C, CN101195485A, CN102502626A all disclose a kind of preparation method by bamboo activated carbon, but the finished carbon after its activation all must be used through chemical cleaning treatment, and preparation process is complicated, and reaction energy consumption is bigger

Method used

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  • Preparation method of columnar bamboo activated carbon

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Experimental program
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Effect test

Embodiment 1

[0030] Bamboo charcoal raw materials are obtained by anaerobic carbonization at 270°C for 16 hours through selected bamboo or bamboo processing wastes and scraps in a retort, and the bamboo charcoal raw materials obtained by an anaerobic retort process are dried until the water content is 1%, and then pulverized. Weigh 10g of bamboo charcoal powder, select 200 mesh national standard sieve to sieve for 3min, accurately weigh the bamboo charcoal powder weight under the sieve, the percentage of the weight under the sieve to the total weight is 96.7%, that is, the 200 mesh pass rate is 96.7%, stop milling, and get Bamboo charcoal powder, measure the bamboo charcoal powder technical parameter that anaerobic dry distillation process makes be volatile matter 16.67%, ash content 1.87%, moisture content 1.15%, fixed carbon 80.31%; Select the product coal tar that 1000 ℃ coal dry distillation obtains, its Asphalt content is 60%, dehydrated to 0.6% moisture, accurately weigh 30kg of dehyd...

Embodiment 2

[0032] Bamboo charcoal raw materials are obtained by anaerobic carbonization at 310°C for 16 hours through selected bamboo or bamboo processing wastes and scraps in a retort, and the bamboo charcoal raw materials obtained by an anaerobic retort process are dried to a moisture content of 3% and then pulverized. Weigh 10g of bamboo charcoal powder, select 200 mesh national standard sieve to sieve for 3min, accurately weigh the bamboo charcoal powder weight under the sieve, the percentage of the weight under the sieve to the total weight is 96.2%, that is, the 200 mesh pass rate is 96.2%, stop milling, and get Bamboo charcoal powder, measure the bamboo charcoal powder technical parameter that anaerobic dry distillation process makes be volatile matter 11.63%, ash content 2.92%, moisture content 0.8%, fixed carbon 85.3%; Select the product coal tar that 1000 ℃ of coal dry distillation obtains, its Asphalt content is 56%, dehydrated to 2.5% moisture, accurately weigh 30kg of dehydra...

Embodiment 3

[0034]Bamboo charcoal raw materials are obtained by anaerobic carbonization at 350°C for 16 hours through selected bamboo or bamboo processing wastes and scraps in a retort, and the bamboo charcoal raw materials obtained by an anaerobic retort process are dried until the water content is 5%, and then pulverized. Weigh 10g of bamboo charcoal powder, select 200 mesh national standard sieve to sieve for 3 minutes, accurately weigh the weight of the bamboo charcoal powder under the sieve, the percentage of the weight under the sieve to the total weight is 95.1%, that is, the 200 mesh pass rate is 95.1%, stop milling, and get Bamboo charcoal powder, measure the bamboo charcoal powder technical parameter that anaerobic dry distillation process makes be volatile matter 13.65%, ash content 3.91%, moisture content 1.8%, fixed carbon 75.27%; Select the product coal tar that 1000 ℃ coal dry distillation obtains, its Asphalt content is 54%, dehydrated to 4% moisture, accurately weigh 30kg ...

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Abstract

The invention belongs to the field of activated carbon production, and particularly relates to a preparation method of columnar bamboo activated carbon. The preparation method comprises the following steps: a primary anaerobic dry distillation process; drying and grinding; kneading; extruding and molding; conserving and sizing; a secondary anaerobic dry distillation process; and activation. Twice anaerobic dry distillation processes are adopted in the production process, a basic guarantee is provided for molding the columnar bamboo activated carbon by the primary anaerobic dry distillation process of the bamboo material, the strength of a columnar molding product is ensured by controlling the inventory and the kiln rotating speed by the secondary anaerobic dry distillation process, and meanwhile, 0.5-5% of coal particles are doped during activation, so that the gas atmosphere in the activating furnace is improved, the unsaturated basic structure of the columnar bamboo activated carbon is generated, the strength and the adsorption property of the columnar bamboo activated carbon are improved, the preparation process is simple, the product carbon does not need to be cleaned, environmental pollution and corrosion to equipment are reduced, and energy consumption in reaction is reduced.

Description

technical field [0001] The invention belongs to the field of activated carbon production, in particular to a preparation method of columnar bamboo activated carbon. Background technique [0002] Bamboo charcoal is generally obtained by high-temperature anaerobic dry distillation of bamboo or bamboo processing residues of more than 3-5 years. The fixed carbon content of bamboo charcoal is more than 85%, and the ash content is 2%-4%. Surface area can be in 500m 2 / g or more. Bamboo activated carbon is deeply activated on the basis of bamboo charcoal, which greatly improves its adsorption performance, and its specific surface area can reach 1100m 2 / g or more, because of its special microporous structure and developed specific surface area, it is a good carrier and is widely used in various industrial applications. At the same time, there are still many deficiencies in the use of bamboo activated carbon. One is: due to the constraints of the existing activation equipment pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/10C01B32/336
Inventor 王学忠赵乾刘培成张小宁李小明
Owner NINGXIA HUAHUI ACTIVATED CARBON
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