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Active carbon preparation method and giant reed active carbon

An activated carbon and a technology for preparing activated carbon, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of high cost, long preparation process, limited supply of raw materials, etc., achieve low cost and increase additional economic value , The effect of broadening the source of raw materials

Active Publication Date: 2014-11-26
SHENZHEN ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the disadvantages of high cost, limited supply of raw materials, and long time-consuming preparation process of the existing activated carbon preparation technology, and provides a simple and environmentally friendly method for preparing activated carbon from reed bamboo

Method used

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  • Active carbon preparation method and giant reed active carbon

Examples

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specific Embodiment approach

[0014] In the following examples, the production of reed bamboo activated carbon comprises the following steps:

[0015] Step (1), preprocessing. After the reed bamboo is harvested, the leaves are removed, the stems are taken out, dried in the sun for 1 to 2 days to remove moisture, then crushed into powder, and sieved to 20 mesh.

[0016] Step (2), carbonization. Mix Arundis powder and carbonization furnace bottom ash in a certain proportion, and send them to the carbonization furnace for carbonization. The carbonization furnace bottom ash used can be the bottom ash after burning various biomass fuels (such as sawdust, abandoned wetland plants) that provide heat for the carbonization process. The mixing amount (mass fraction) of bottom ash is 10-30%. The carbonization process is carried out under the condition of cutting off the air, the temperature of the carbonization furnace is 400-600°C, and the carbonization time is 10-30 minutes.

[0017] Step (3), activation. Cont...

Embodiment 1

[0023] Naturally sun-dried reed bamboo was crushed into powder, sieved to 20 mesh, mixed with 30% carbonization furnace bottom ash, and then carbonized. The temperature of the carbonization furnace was 600°C, and the carbonization time was 10 minutes. Continue to pass in the mixed gas of air and water vapor for activation, the concentration of water vapor is 15%, the activation temperature is 800°C, and the activation time is 30 minutes. After the carbonization furnace is naturally cooled to room temperature, the carbonized material is taken out, subjected to winnowing and separation, pickling and deashing, rinsing, and drying to obtain the finished Arundis activated carbon.

Embodiment 2

[0025] Naturally sun-dried reed bamboo was crushed into powder, sieved to 20 mesh, mixed with 20% carbonization furnace bottom ash, and then carbonized. The temperature of the carbonization furnace was 500°C, and the carbonization time was 20 minutes. Continue to pass in the mixed gas of air and water vapor for activation, the water vapor concentration is 10%, the activation temperature is 800°C, and the activation time is 60 minutes. After the carbonization furnace is naturally cooled to room temperature, the carbonized material is taken out, subjected to winnowing and separation, pickling and deashing, rinsing, and drying to obtain the finished Arundis activated carbon.

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Abstract

The invention provides a preparation method of active carbon as well as active carbon prepared by taking giant reed as a raw material. Stove ashes are taken as an additive, and alkali metal salts rich in the stove ashes can be utilized to greatly accelerate the separation velocity of volatile components in the raw material, so that the carbonization time is shortened and the product quality is improved. The preparation method comprises the steps of carbonization, activation, winnowing separation, acid-washing and ash-removing, rinsing and drying. By virtue of the preparation method of the giant reed active carbon, not only are waste plant resources of a constructed wetland sufficiently utilized to improve the economic value added of the wetland plants and broaden a raw material source channel for active carbon production, but also the time consumption in a preparation process is shortened to a certain extent to improve the product quality, and thus the preparation method has the advantages of low cost, a simple preparation process and the like.

Description

technical field [0001] The invention relates to a preparation method of activated carbon and Arundos reeds activated carbon, in particular to Arundos reeds activated carbon with large specific surface area and iodine adsorption value, which can be used in the technical fields of water treatment and waste gas treatment. Background technique [0002] Activated carbon is an excellent adsorption material, widely used in pharmaceutical, chemical, food, metallurgy and other fields. As people pay more attention to environmental protection, the demand for activated carbon in various industries is also increasing. At present, the raw materials for preparing activated carbon are still mainly coal, wood, and fruit shells. However, due to the limitation of raw material sources, the supply price of activated carbon remains high. Therefore, more and more attention has been paid to the development of cheap and easy-to-obtain activated carbon raw materials and to reduce the production cost...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/10C01B32/336
Inventor 成功林静尹魁浩卢建李琼辉李明杰
Owner SHENZHEN ACAD OF ENVIRONMENTAL SCI
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