Method for preparing active carbon by using coal

A technology for preparing activated carbon and activated carbon, which is applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of large investment in electric tar collectors, difficult treatment of circulating wastewater, high energy and power consumption, and achieves broad application prospects, The effect of saving strategic materials and sufficient and stable supply of raw materials

Active Publication Date: 2012-07-18
西安三瑞实业有限公司
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Problems solved by technology

[0006] In the current activated carbon production process, due to factors such as large investment in electric tar collectors, high energy and power consumption, and difficulty in recycling wastewater treatment, most activated carbon manufacturers do not comprehensively recover the exhaust gas from the carbonization furnace, but directly burn it to provide heat for the carbonization furnace, which wastes a lot of energy. tar and other strategic materials

Method used

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  • Method for preparing active carbon by using coal
  • Method for preparing active carbon by using coal
  • Method for preparing active carbon by using coal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] 1) Crushing and screening the raw long-flame coal to ≤30mm, the bulk density of the raw coal used is 680kg / m 3 , the industrial analysis results are as follows:

[0048]

[0049] 2) The raw material long-flame coal is measured by the belt scale from the raw material storage bin, and then sent to the rotary drying furnace at a speed of 4.2t / h through the double-turn valve. After starting, it is evenly sprinkled, and the raw material is in direct and full contact with the high-temperature exhaust gas of the gas generator during the spilling process, so that the temperature of the raw coal is preheated to 180°C, and the moisture in the coal and the gas adsorbed in the pores of the coal are removed. The rotation of the body continuously moves to the tail of the furnace, and finally the furnace body is discharged through the discharge box at the tail of the furnace. After drying, the moisture in the coal can be reduced to below 1%. The dust entrained in the dry tail gas ...

Embodiment 2

[0069] 1) Crushing and screening the raw coal to ≤30mm, the industrial analysis results are as follows:

[0070]

[0071] 2) After the raw coal is measured by the belt scale from the raw material storage bin, it is sent to the steam pipe rotary dryer at a speed of 2t / h through the double-reversed valve, so that the raw coal temperature is dried and desorbed for 30 minutes at 120°C. The moisture in the coal and the gas adsorbed in the pores of the coal are removed, and the moisture in the coal can be reduced to less than 10% after drying. The heat required for drying is transferred to the coal by the saturated water vapor through the steam tube of the drying furnace. The dust entrained in the dry tail gas is separated and collected by the first-stage cyclone separator and the first-stage bag filter.

[0072] 3) The dried coal enters the double-disc valve through the slide pipe, enters the rotary carbonization furnace through the double-disc valve, and heats and retorts the ...

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Abstract

The invention provides a method for preparing active carbon by using coal. The method comprises the following steps: after feed coal is dried, dry-distilled at low temperature and cooled, semicoke is obtained; deashing is carried out on the semicoke in which the ash content can not meet the production requirement of the active carbon; coal is mixed with certain viscosity into the semicoke which can not meet the strength of the active carbon according to the characteristics; after mixed with the coal, the raw materials are mixed fully by crushing and grinding; after a certain amount of binding agent is added, the powder is mixed and kneaded, and is pressed into a forming material with a special shape in forming equipment; the forming material enters a carbonization furnace by a conveying device, carrying out heat treatment, dry-distillation, heat cracking and condensation reaction at different temperature sections to prepare carbonized materials; the carbonized materials are conveyed to a cooling furnace for cooling by the conveying device; and the cooled carbonized materials are conveyed to an activating furnace, and is activated by utilizing an activating agent. The method has the advantages that the industrial chain for comprehensive utilization of subcannel coal is extended, the utilization bottleneck of the semicoke is broken, products with increasing market demand are produced, the strategic resources short in China can be effectively recovered, and large economic and social benefits can be created.

Description

technical field [0001] The invention relates to an industrial method for preparing activated carbon from coal, specifically a method for producing high-quality activated carbon through dry distillation, deashing, kneading, carbonization, activation and other processes. Background technique [0002] Activated carbon is an excellent adsorbent with a developed internal pore structure and a huge specific surface area. It has been widely used in industrial wastewater, waste gas and air purification devices, as well as in industries such as organic synthesis, food and medicine, as well as military and high-tech industries. . [0003] Coal-based activated carbon is made from specific coal or coal blending through carbonization and activation. The main component is a graphite-like carbonaceous layered structure, and the carbonaceous component is 80-90%. Coal-based activated carbon can be divided into coal-based granular activated carbon and coal-based powdered activated carbon. G...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/10C01B32/336
Inventor 何建祥谢小兵魏超杨扬王思远王占国
Owner 西安三瑞实业有限公司
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