Process for preparing active carbon using tea processing refuse as raw material

A technology for preparing activated carbon and leftovers, which is applied in the field of preparing activated carbon, can solve the problems of large total pore volume, high reactivity, and unsuitability for social sustainable development, and achieve the effects of high pore volume, improved decolorization power, and reasonable utilization

Inactive Publication Date: 2006-01-25
高逸 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although activated carbon produced from wood materials has four advantages compared with activated carbon produced from other raw materials: large total pore volume, large specific surface area, high reactivity, and less impurities, it is no longer possible to produce activated carbon at the cost of sacrificing forest resources and destroying the environment. Meet the needs of sustainable social development

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for preparing activated carbon from tea processing leftovers, characterized in that it comprises the following process steps:

[0031] A. Raw material screening: select 10 tons of leftovers from tea processing, chop them up, pass through a mesh sieve, and screen out the broken residues to obtain 9.5 tons of materials ≤ 0.5cm×1cm.

[0032] B. Carbonization: Put the screened material into the vertical carbonization furnace, feed 500Kg each time, discharge once per hour, feed while discharging, and carbonize at 450°C for 20 hours to obtain carbonized material 2.95 t, the measured technical parameters are as follows:

[0033] Volatile content 24.0%, ash content 1.8%, water content 2.60%, fixed carbon 71.60%.

[0034] C. Activation: Put 2.95 tons of the prepared carbonized material into a rotary activation furnace, and activate it with superheated steam at a temperature of 760° C. for 14 hours to obtain the activated material.

[0035] D, post-processing: the prep...

Embodiment 2

[0052] A method for preparing activated carbon from tea processing leftovers is characterized in that it comprises the following process steps:

[0053] A. Raw material shaping and impregnation: chop the raw material, pass through a mesh sieve, remove the slag and select a raw material of ≤0.5cm×1cm as the material, and dry it until the water content is less than 20%, take 1 ton of the processed material, add 20Kg hydrogen peroxide and 80Kg phosphoric acid mixed solution for immersion for 12 hours.

[0054] B. Carbonization: Put the impregnated material into a flat-plate carbonization furnace, and carbonize it at a temperature of 280-300°C for 60 minutes to obtain carbonized material.

[0055] C. Activation: Put the prepared carbonized material into a double-row activation furnace, first activate it with superheated steam at a temperature of 450°C for 3 hours to obtain the activated material, then put the activated material into the recovery pool, and heat water to dissolve an...

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PUM

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Abstract

A process for preparing activated carbon from tea leftover includes such steps as screening or shaping raw material, carbonizing, activating and post-treating. Its advantages are high de-coloring power, high pore volume, large specific surface area, and high purity.

Description

technical field [0001] The invention relates to a method for preparing activated carbon, in particular to a method for preparing activated carbon by using leftovers from tea production as raw materials. Background technique [0002] Activated carbon is widely used in petroleum, medicine, chemical industry, food, national defense industry, safety protection, environmental protection and other fields. According to rough statistics, the annual output of activated carbon in the country is more than 250,000 tons, and the raw materials for manufacturing activated carbon are also various, including wood, coal, and fruit shells. Although activated carbon produced from wood materials has four advantages compared with activated carbon produced from other raw materials: large total pore volume, large specific surface area, high reactivity, and less impurities, it is no longer possible to produce activated carbon at the cost of sacrificing forest resources and destroying the environment...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/08
Inventor 高逸林琳
Owner 高逸
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