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Production method of activated carbon made from straw

A production method and activated carbon technology are applied in the production field of producing activated carbon from straw, and achieve the effect of increasing the degree of controllability and enriching comprehensive utilization channels.

Inactive Publication Date: 2012-02-01
TAIYUAN E POWER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These production methods do not use a large amount of remaining straw in the farmland every year, which urgently needs to be developed and comprehensively utilized.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: a kind of production method of making gac with stalk, adopts following steps to prepare:

[0026] The first step is to prepare materials according to weight percentage: all select straw;

[0027] The second step is to remove sand and soil: the above raw materials are separated by specific gravity to remove sand and soil;

[0028] The third step, crushing: crush the raw materials after removing the sand into 2mm granules and mix them evenly;

[0029] The fourth step, forming: the mixed material is pressed and formed under a pressure of 8 MPa by a forming machine;

[0030] The fifth step, carbonization: carbonize the formed material in a vertical rotary furnace, temperature: 750°C, carbonization time: 8 hours;

[0031] The sixth step, activation: activate the carbonized material in a Sleep furnace, activation temperature: 860°C, activation time: 58 hours;

[0032] The seventh step, screening: the same as the prior art.

[0033] The eighth step, grinding ...

Embodiment 2

[0034] Embodiment 2: a kind of production method of making gac with stalk, adopts following steps to prepare:

[0035] The first step is to prepare materials according to weight percentage: all select straw;

[0036] The second step is to remove sand and soil: the above raw materials are separated by specific gravity to remove sand and soil;

[0037] The third step, crushing: crush the raw materials after removing the sand into 6mm granules and mix them evenly;

[0038] The fourth step, forming: the mixed material is pressed into shape with a molding machine under a pressure of 20MPa, and then the forming material is broken into 4mm particles;

[0039] The fifth step, carbonization: carbonize the formed and crushed material in a horizontal rotary furnace, temperature: 550°C, carbonization time: 110min;

[0040] The sixth step, activation: activate the carbonized material in a Sleep furnace, activation temperature: 950°C, activation time: 50 hours;

[0041] The seventh step,...

Embodiment 3

[0043] Embodiment 3: a kind of production method of making gac with stalk, adopts following steps to prepare:

[0044] The first step is to prepare materials according to weight percentage: all select straw;

[0045] The second step is to remove sand and soil: the above raw materials are separated by specific gravity to remove sand and soil;

[0046] The third step, crushing: crush the raw materials after removing the sand into 8mm crumbs and mix them evenly;

[0047] The fourth step, forming: the mixed material is pressed and formed under a pressure of 25MPa by a forming machine;

[0048] The fifth step, carbonization: carbonize the formed and crushed material in a horizontal rotary furnace, temperature: 450°C, carbonization time: 60min;

[0049] The sixth step, activation: activate the carbonized material in a horizontal rotary furnace, activation temperature: 880°C, activation time: 1.5 hours;

[0050] The seventh step, screening: sieve the activated material, and sieve ...

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Abstract

The present invention uses straw to make the production method of activated carbon, belongs to the technical field of the production method of activated carbon; The invention provides a kind of production method of making activated carbon with straw; Preparation: material preparation by weight percentage, sand removal, crushing, molding, carbonization, activation, screening; packaging; the production method also includes carbonization before the molding step, and sometimes needs to be carbonized again after the molding step according to the requirements of the product. According to the requirements of the product, it is sometimes necessary to crush the molding material into particles of 3-10 mm after molding and then carbonize; the straw is cotton stalk, or rice stalk, or jute stalk, or sorghum stalk, and the hydrocarbon The compound is coal, and the alkali metal hydroxide is sodium hydroxide; the invention is applied to the technical field of making activated carbon with straw.

Description

technical field [0001] The invention discloses a production method for making activated carbon from straws, belonging to the technical field of activated carbon production methods. Background technique [0002] Activated carbon is an excellent adsorbent with developed pore structure, large specific surface area and strong adsorption capacity. It can be divided into coconut shell, walnut shell, apricot shell, wood chips, etc.; according to different manufacturing methods, it can be divided into: gas activated carbon, chemical activated carbon, chemical and gas combined activated carbon, etc.; from the shape, it can also be divided into powdery carbon , Cylindrical carbon, spherical carbon, fiber carbon, unshaped crushed carbon, etc. [0003] The factors that determine the performance of activated carbon are: raw materials and processing, raw material ratio, molding process, carbonization, activation process and equipment; adding a certain proportion of different substances o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/08
Inventor 李怀珠李屹刘汉涛阴兆栋常建忠赵建设李贵良孟祥定
Owner TAIYUAN E POWER TECH
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