Method for coal gasification and quick co-production of activated carbon

A technology of activated carbon and coal gasification, applied in the field of chemistry and chemical engineering, can solve the problems of high energy consumption, long activation time, pollution, etc., and achieve the effects of reducing production energy consumption, solving pollution problems, reducing energy consumption and operating costs

Inactive Publication Date: 2013-11-27
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method not only reduces the energy consumption and cost of the current high-temperature coal gasification operation, but also solves the problems of long activation time, high en

Method used

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  • Method for coal gasification and quick co-production of activated carbon
  • Method for coal gasification and quick co-production of activated carbon
  • Method for coal gasification and quick co-production of activated carbon

Examples

Experimental program
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Example Embodiment

[0027] Example 1:

[0028] according to figure 1 The process flow of coal gasification and co-production of activated carbon uses bituminous coal as raw material, air as gasification agent, and the oxygen-to-coal ratio is 0.53-0.54Nm 3 / kg, the reaction temperature in the co-production unit is about 1360-1400°C, and the operating pressure is 2.0MPa. The residence time of pulverized coal in the furnace is less than 10 seconds. The pore structure parameters of the product are summarized in the attached table. The semi-finished activated carbon recovered by the dust collector has a specific surface area of ​​492m 2 / g, average pore diameter 3.99nm, total pore volume 0.49cm 3 / g; The specific surface area of ​​the finished activated carbon after acid washing and water washing is 646m 2 / g, average pore diameter 4.25nm, total pore volume 0.69cm 3 / g;

Example Embodiment

[0029] Example 2:

[0030] Using sub-bituminous coal as raw material, 0.2MPa CO 2 As a gasification agent, when the operating temperature of the co-production unit is 1300℃, the specific surface area of ​​the activated carbon product is 670m 2 / g; when the operating temperature is 1400℃, the specific surface area is as high as 850m 2 / g of activated carbon products;

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Abstract

A method for the coal gasification and the quick co-production of activated carbon belongs to the field of chemistry and chemical engineering, and is characterized in that dry coal powder or carbonous organic substances are taken as raw materials, air or the mixture of oxygen and water vapour is taken as a gasifying agent, the ratio of oxygen to coal is adjusted within the range from 0.3 to 0.58 Nm<3>/kg, the ratio of vapor to coal is adjusted within the range from 0.01 to 0.5 kg/kg, a co-production device is operated under the condition that the gasification reaction temperature is 1200-1400 DEG C and the operating pressure is 0.1-4.0 Mpa, and 75-90% of organic compositions in the dry coal powder or the carbonous organic substances can be converted into coal gas; the high-temperature coal gas from the co-production device is subjected to temperature reduction by a waste heat boiler and gas-solid separation by a dust remover, so as to obtain semi-finished activated carbon; finally, the semi-finished activated carbon is subjected to acid pickling, wet floatation and drying, so as to obtain the co-production activated carbon. According to the invention, the activated carbon product obtained by adopting the method has an advanced mesopore structure and excellent liquid phase adsorption and decoloration performance, the adsorbing and purifying effects to organic substances in water are superior to those of high-priced activated carbon products prepared by adopting certain traditional methods, no pollution is generated in the production, and the efficiency is high, so that the method is environment-friendly, and can be used for producing activated carbon in a clean manner.

Description

technical field [0001] The invention relates to a method for clean and rapid production of powdered activated carbon, which belongs to the field of chemistry and chemical engineering, and particularly relates to a method for moderate gasification of pulverized coal or powdered carbon-containing organic matter in a dry feed co-production device A method for simultaneously co-producing high value-added powdered activated carbon with syngas or fuel gas. Background technique [0002] As an excellent adsorption material, activated carbon has become an indispensable environmental protection product for human beings to improve their own living environment. Especially with the continuous increase of environmental protection in recent years, the domestic demand and export volume of activated carbon have continued to grow. At present, the main processes of activated carbon production at home and abroad include physical activation and chemical activation. The physical activation proce...

Claims

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Application Information

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IPC IPC(8): C10J3/46C10J3/84C10J3/86C01B31/08C01B32/318C01B32/324
CPCY02P20/129
Inventor 张岩
Owner DALIAN UNIV OF TECH
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