Method for producing activated carbon from straws

A production method and activated carbon technology, applied in the production field of activated carbon made of straw, to achieve the effect of increasing controllability and enriching comprehensive utilization channels

Inactive Publication Date: 2010-05-05
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 activated carbon 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 the Sleep furnace, the activation temperature: 860°C, the activation time: 58 hours;

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

[0033] The...

Embodiment 2

[0034] Embodiment 2: a kind of production method of making activated carbon 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 the Sleep furnace, the activation temperature: 950 ° C, the activation time: 50 hours;

...

Embodiment 3

[0043] Embodiment 3: a kind of production method of making activated carbon 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 materia...

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PUM

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Abstract

The invention relates to a method for producing activated carbon from straws, belonging to the technical field of methods for producing activated carbon. The invention provides the method for producing activated carbon from straws, which adopts the following technical scheme and comprises the following production steps: preparing raw materials in percentage by weight, removing sandy soil, crushing, forming, carbonizing, activating, screening and packaging, wherein before the fourth forming step, adding a fifth carbonizing step; and after the fourth forming step, crushing the formed materials into particles with the particle size of 3-10mm, and then, carrying out the fifth carbonizing step. The straw is cotton straw or paddy straw or jute straw or sorghum straw, the hydrocarbon is coal, and the alkali metal hydroxide is sodium hydroxide. The invention is applied to the technical field of producing activated carbon from straws.

Description

technical field [0001] The invention discloses a production method for making activated carbon with straw, and belongs 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 also be divided into coconut shell, walnut shell, apricot shell, wood chips, etc.; according to different manufacturing methods, it can be divided into: activated carbon by gas method, activated carbon by chemical method, activated carbon by chemical drug and gas, etc.; It is powdery carbon, cylindrical carbon, spherical carbon, fiber carbon, amorphous 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 or chemicals c...

Claims

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Application Information

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Patent Type & Authority Applications(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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