Preparation method of coal-based agglomerated activated carbon having high adsorbability and high bulk specific weight

A technology of high adsorption and activated carbon, which is applied in the direction of chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problem that it is difficult to balance the adsorption and specific gravity of activated carbon, so as to prolong the replacement time, high adsorption and reduce replacement frequency effect

Active Publication Date: 2016-10-26
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a method for preparing coal-based briquette activated carbon with high adsorption and high stack specific gravity, so as to solve the problem that it is difficult to take into account the adsorption and stack specific gravity of activated carbon when preparing coal-based briquette activated carbon by traditional methods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0034] The non-caking coal is the raw coal of Kuangou Coal Mine in Urumqi, with a received basis volatile matter of 32.27 and an apparent density of 1.37g / cm 3 , cohesion index 0. The strong caking coal is Zhundonghongshanwa gas-rich coal, CO 2 The reactivity is greater than 95%. The asphalt is high-temperature modified coal tar pitch produced by Baoli Chemical Industry in Handan, Hebei Province, and its softening point is 113-118°C. A strong basic compound is potassium hydroxide.

[0035] In the raw coal, the content of non-caking coal is 90wt%, the content of strong caking coal is 5wt%, the content of bitumen is 4.5wt%, and the content of potassium hydroxide is 0.5wt%. The raw coal is pulverized and screened into coal powder with an average particle size of 29 μm, wherein the content of coal powder with a particle size greater than 80 μm is 2.5 wt %; the content of coal powder with a particle size greater than 40 μm is 28 wt %.

[0036] Use a briquette forming machine to...

Embodiment 2

[0039] The difference from Example 1 is that the non-caking coal is the raw coal of Hami Poly Coal Mine, the dry ash-free base volatile content is 35.54, the caking index is 2, and the apparent density is 1.35g / cm 3 . Strong caking coal is Xinjiang Fukang Shuntong coking coal, CO 2 The reactivity is greater than 95%.

[0040] In the raw coal, the content of non-caking coal is 85wt%, the content of strong caking coal is 10wt%, the content of bitumen is 4.5wt%, and the content of potassium hydroxide is 0.5wt%. The specific gravity of the pressed material pile is 670g / l, and the strength is 93.3.

[0041] The indicators of the activated carbon are as follows: the iodine value of the product is 1091, the strength is 96.87, and the bulk specific gravity is 557.

Embodiment 3

[0043] The difference from Example 2 is that before briquetting, the pulverized raw coal is sieved to coal powder with an average particle size of 22 μm, wherein the content of coal powder with a particle size greater than 80 μm is 2 wt %; the coal powder with a particle size greater than 40 μm Coal powder content is 15wt%. The specific gravity of the pressed material pile is 700g / l, and the strength is 93.1.

[0044] The indicators of the activated carbon are as follows: the iodine value of the product is 1092, the strength is 96.32, and the bulk specific gravity is 568.

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Abstract

The invention discloses a preparation method of coal-based agglomerated activated carbon having high adsorbability and high bulk specific weight. The preparation method comprises the following steps that non-caking coal and strong caking coal are used as raw materials to perform coal blending, the coal is mixed with asphalt and a strong alkaline compound, and smashing is performed to obtain raw material coal, wherein the raw material coal contains, by total weight, the non-caking coal 80-90%, the strong caking coal 5-15%, the asphalt 3-7% and a strong alkaline compound 0.2-1%; the raw material coal is briquetted, formed and granulated to obtain coal granules; the coal granules are subjected to oxidation treatment, carbonization treatment and activation treatment so as to produce the activated carbon. The preparation method utilizes a certain amount of non-caking coal and strong caking coal for coal blending to prepare the activated carbon, so that the activated carbon products also keep higher adsorbability while having high bulk specific weight, and the problem that the adsorbability and the bulk specific weight of the activated carbon are difficult to consider when the coal-based agglomerated activated carbon is prepared by adopting a traditional method is solved.

Description

technical field [0001] The invention belongs to the field of activated carbon preparation, and relates to a method for preparing coal-based briquetted activated carbon with high adsorption and high bulk specific gravity. Background technique [0002] Because activated carbon has a highly developed pore structure and a large specific surface area, its applications range from decolorization and deodorization of food and medicine, gas masks, to large-scale use in solvent refining and recovery, advanced water treatment, flue gas Purification, blood purification, etc., put forward new and higher requirements for the adsorption performance of activated carbon. [0003] Activated carbon is divided according to its form, including shaped activated carbon and powdered activated carbon. Compared with shaped activated carbon, powdered activated carbon has greater adsorption (iodine value and / or methylene blue value), but due to its powdery form, it is limited. application field. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/10C01B32/336
CPCC01P2006/21C01P2006/90
Inventor 陆晓东王成申明琪赵龙王洪强韩晓林刘昆轮庄巍
Owner CHNA ENERGY INVESTMENT CORP LTD
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