Method for preparing activated carbon from fluidized bed flying ash and pulverized coal

A technology for preparing activated carbon and fluidized bed, applied in chemical instruments and methods, inorganic chemistry, carbon compounds, etc., can solve the problems of high production cost, unfavorable environmental protection, secondary pollution, etc., to reduce the preparation cost and reduce the dust removal load in the later stage , to achieve the effect of zero emissions

Pending Publication Date: 2018-05-18
BEIJING QUNYOU NEW ENERGY TECH CO LTD
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  • Abstract
  • Description
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Problems solved by technology

[0006] At present, in the method of using fly ash to prepare activated carbon, the main method is to first recover the carbon from the fly ash through flotation, and then activate the finished product of activated carbon. The process chain of the whole process is long, requires chemicals, and the production cost is high. , and requires chemical agents, which is likely to cause secondary pollution and is not conducive to environmental protection

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  • Method for preparing activated carbon from fluidized bed flying ash and pulverized coal

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preparation example Construction

[0040] In the method for preparing activated carbon proposed by the present invention, the waste produced in the fluidized bed gasification process is fully utilized: fly ash, which can be directly used to prepare activated carbon without flotation, which significantly reduces the preparation cost of activated carbon, not only The resource utilization of fly ash is realized, the zero discharge of industrial process is realized, and the economic benefits are also increased.

[0041] At the same time, the method of the present invention can also use the fine-grained pulverized coal produced by the fluidized bed coal preparation system to prepare activated carbon, which not only realizes the recycling of pulverized coal, but also reduces the post-stage dust removal load of the fluidized bed and reduces operating costs. The operation of the equipment is simpler, and the safe and stable long-term operation of the equipment is guaranteed. Moreover, the water vapor generated in the f...

Embodiment 1

[0043] Weigh 0.5 kg of fluidized bed fly ash and 0.5 kg of pulverized coal from the coal preparation system and put them into a ball mill to grind until the particle size is ≤100 μm to obtain a mixture. Send the mixture into a box-type resistance furnace for carbonization: raise the temperature in the furnace to 500°C in 47 minutes, and keep the temperature for 1 hour to obtain a carbonized material. Add 0.4kg of coal tar and 0.5kg of water to the cooled carbonized material, stir, mix and knead at 60°C, and then carry out molding and drying treatment to obtain a shaped carbonized material. Then put the formed carbonized material into the tube-type resistance furnace, and pass water vapor into the tube-type resistance furnace at a flow rate of 1.3kg / h, and raise the temperature to 750°C for 4 hours to obtain activated carbon.

[0044]The iodine adsorption value of the activated carbon prepared in this example was 782 mg / g, and the methylene blue adsorption value was 132 mg / g. ...

Embodiment 2

[0046] Weigh 0.5 kg of fluidized bed fly ash and 0.5 kg of pulverized coal from the coal preparation system and put them into a ball mill to grind until the particle size is ≤100 μm to obtain a mixture. Send the mixture into a box-type resistance furnace for carbonization: raise the temperature in the furnace to 550°C in 40 minutes, and keep the temperature for 1 hour to obtain a carbonized material. Add 0.4kg of coal tar and 0.5kg of water to the cooled carbonized material, stir, mix and knead at 60°C, and then carry out molding and drying treatment to obtain a shaped carbonized material. Then put the formed carbonized material into the tube-type resistance furnace, and pass water vapor into the tube-type resistance furnace at a flow rate of 1.3kg / h, and raise the temperature to 800°C for 4 hours to obtain activated carbon.

[0047] The iodine adsorption value of the activated carbon sample prepared in this embodiment is 698 mg / g, and the methylene blue adsorption value is 11...

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Abstract

The invention relates to a method for preparing activated carbon from fluidized bed flying ash and pulverized coal. The method comprises the following steps: uniformly mixing fluidized bed flying ashand pulverized coal, and finely grinding so as to obtain a mixed material; carbonizing the mixed material so as to obtain a carbonized material; putting an adhesive into the carbonized material, mixing and kneading under a heating condition, and performing molding and drying treatment so as to obtain a molded carbonized material; feeding the molded carbonized material into an activation device, introducing steam into the activation device, and performing activation treatment on the molded carbonized material with steam, therein obtaining activated carbon. By adopting the method provided by theinvention, the fluidized bed flying ash can be directly adopted to prepare activated carbon without floating separation, recycling of flying ash is achieved, and the preparation cost of the activatedcarbon is reduced; in addition, activated carbon can be also prepared from pulverized coal generated from a fluidized bed standby coal system, recycling treatment of coal ash is achieved, later dustcollection burden of a fluidized bed is reduced, the operation cost is reduced, and equipment operation can be relatively simple to implement.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a method for preparing activated carbon by utilizing fluidized bed fly ash and pulverized coal. Background technique [0002] Fluidized bed gasification technology has the advantages of wide adaptability to coal types, low investment, and quick results. It is an important direction for the development of coal conversion technology. The coal gas produced by fluidized bed gasification technology contains a large amount of fly ash with high carbon content. The particle size of these fly ash is very small, which leads to the reduction of carbon conversion rate in the gasifier, which will not only cause waste of energy, but also pollute environment and endanger human health. [0003] At present, the comprehensive utilization of fly ash is mainly used as building materials, and its requirements on carbon content are relatively strict. The standard "GB / T1596-2017 Powdered Coal U...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/324C01B32/336
Inventor 王光尚久石沈大平常玉洁
Owner BEIJING QUNYOU NEW ENERGY TECH CO LTD
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