Tar-free activated carbon preparation method

A kind of activated carbon preparation, tar-free technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve pollution, hazards and other problems, achieve the effect of solving environmental pollution problems, improving working environment, and increasing porosity

Pending Publication Date: 2020-09-22
INNER MONGOLIA PURUIFEN ENVIRONMENTAL SCI ANDTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing tar-free activated carbon, which solves the problems of pollution and harm of using coal tar as a binder to prepare activated carbon

Method used

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  • Tar-free activated carbon preparation method
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  • Tar-free activated carbon preparation method

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Experimental program
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Embodiment approach

[0054] Such as figure 1 Shown, according to one embodiment of the present invention, a kind of tar-free activated carbon preparation method of the present invention comprises:

[0055] S1. Mixing the powdery carbonaceous raw material and asphalt into the first material;

[0056] S2. adding a dry powder binder to the first material and mixing it into a second material;

[0057] S3. Heat-treat the second material to generate activated carbon.

[0058] According to one embodiment of the present invention, in step S1, the carbon-containing raw material is one or more of anthracite, semi-coal, bituminous coal, wood, plant branches, and activated carbon sieve material. In this embodiment, the carbon-containing raw materials are mixed according to a certain ratio of several selected carbon-containing raw materials, wherein the bituminous coal includes coking coal and weakly caking coal. Certainly, other carbon-containing raw materials may also be used as the carbon-containing raw ...

Embodiment 1

[0086] Put 7wt% weak caking coal, 23wt% coking coal and 70wt% semi-coke into coal powder with a particle size of 325 mesh and put it into a kneader with a temperature above 80°C, add 18wt% coal tar and mix for 15-20min, then add water Continue mixing for 10-15 minutes, and the molding material is prepared by the granulator, and the molding material is put into the carbonization furnace with the temperature at the end of the furnace at 300 to 350 °C, the temperature in the furnace at 400 to 500 °C, and the temperature at the furnace head at 700 to 800 °C Heat treatment, and the speed of the carbonization furnace is controlled at 1.0-2.5 rpm, the heating rate is controlled at 5-20°C / min, the material is carbonized and then put into the activation furnace, and the activator (water vapor) is mixed with the activator (water vapor) at 850-980°C Activation reaction is carried out to generate activated carbon, and finally sieved to obtain the product activated carbon.

Embodiment 2

[0088] Make 12wt% weak caking coal, 15wt% coking coal, 10wt% bitumen and 63wt% semi-coke into coal powder with a particle size of 325 mesh (i.e. the first material) and put it in a kneader at a temperature of 30-50°C for 15-20min , the preparation mass ratio is the aqueous solution of 3wt% binding agent (comprising one or more mixtures of guar gum, xanthan gum, sodium alginate), and then takes the binding agent aqueous solution according to the 10-35wt of the first material quality %, continue to mix with the first material in the kneader for 10-15 minutes, after the molding material (ie the second material) is obtained by the granulator, the molding material is put into the tail of the furnace at a temperature of 300 to 350 ° C, and the temperature in the furnace is 400 to 500°C, the furnace head temperature is heated in a carbonization furnace at 700 to 800°C, and the speed of the carbonization furnace is controlled at 1.0-2.5 rpm, and the heating rate is controlled at 5-20°C...

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Abstract

The invention relates to a preparation method of tar-free activated carbon. The preparation method comprises the following steps: S1, mixing a powdered carbon-containing raw material with asphalt to form a first material; S2, adding a dry powder binder into the first material, and mixing to obtain a second material; and S3, carrying out heating treatment on the second material to generate the activated carbon. According to the scheme, coal tar is replaced with the dry powder binder to produce activated carbon, environmental pollution and occupational health hazards of the coal tar in use are avoided, potential safety hazards are eliminated, and management investment is reduced. Meanwhile, the problem of carbonization tail gas treatment caused by the fact that coal tar is adopted as a binder to produce activated carbon is solved, investment of tail gas treatment equipment is reduced, and cost is saved.

Description

technical field [0001] The invention relates to a method for preparing activated carbon, in particular to a method for preparing tar-free activated carbon. Background technique [0002] In traditional activated carbon production, raw materials, tar and water are mixed to form a mixture, which is extruded into a column by molding equipment, and then coal-based activated carbon products are produced through carbonization and activation processes. Among them, coal tar provides the product skeleton for activated carbon in the production of activated carbon and plays a bonding role in the kneading process. However, in the actual use process, tar contains a large number of toxic and harmful components, and there are major safety hazards and difficult carbonization tail gas treatment. , For example, 1. Coal tar contains a large amount of volatile toxic and harmful substances, which seriously endanger the health of employees. 2. The process of using coal tar is complex and difficul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/336C01B32/33C01B32/324C01B32/318
CPCC01B32/336C01B32/33C01B32/324C01B32/318
Inventor 乔骊竹张振彭汉忠尚永飞赵清万兴龙侯龙飞任平杨源
Owner INNER MONGOLIA PURUIFEN ENVIRONMENTAL SCI ANDTECH
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