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Method for preparation of desulfurization denitrification molded activated coke by gasification slag separation carbon

A technology for desulfurization, denitrification, and gasification of slag, which is applied in chemical instruments and methods, inorganic chemistry, carbon compounds, etc., can solve the problems of increased process cost, difficult industrial application, complex process, etc., and achieves the effect of improving utilization value and low cost

Pending Publication Date: 2019-07-09
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the process is complex, and a large amount of chemical reagents will be used in the processes of capture reaction, foaming reaction, acid treatment, water washing, etc., resulting in a large amount of waste water. Due to the high environmental protection requirements today, it is difficult to realize industrial application; in addition, repeated drying is required in the process, which is extremely difficult. Greatly increased process cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A method for preparing desulfurization and denitrification molded activated coke by separating carbon from gasification slag, comprising the following steps:

[0044] (1) The raw material of gasification slag is obtained from GSP furnace, its dry basis carbon content is 26.21%, volatile matter is 2.86%, and its specific surface area is 223m 2 .g -1 . The gasification slag is separated from carbon ash by water medium separation, and the gasification slag with a carbon content of 82.44% is obtained, the volatile fraction is 4.75%, and the specific surface area is 286m 2 .g -1 , particle size> 0.074mm.

[0045] (2) Dry the gasification slag with a carbon content of 82.44%, caking coal and long-flame coal at 110°C for 3 hours, then pulverize and sieve respectively to obtain gasification slag carbon powder and caking coal with a particle size of <0.074mm. Then put the three in the kneader according to the mass ratio of gasification slag carbon powder: caking coal powder:...

Embodiment 2

[0051] A method for preparing desulfurization and denitrification molded activated coke by separating carbon from gasification slag, comprising the following steps:

[0052] (1) The raw material of gasification slag is obtained from GSP furnace, its dry basis carbon content is 26.21%, volatile matter is 2.86%, and its specific surface area is 223m 2 .g -1 . The gasification slag is separated from carbon ash by water medium separation, and the gasification slag with a carbon content of 82.44% is obtained, the volatile fraction is 4.75%, and the specific surface area is 286m 2 .g -1 , particle size> 0.074mm.

[0053] (2) Dry the gasification slag with a carbon content of 82.44%, caking coal and long-flame coal at 110°C for 3 hours, then pulverize and sieve respectively to obtain gasification slag carbon powder and caking coal with a particle size of <0.074mm. Then put the three in the kneader according to the mass ratio of gasification slag carbon powder: caking coal powder:...

Embodiment 3

[0060] A method for preparing desulfurization and denitrification molded activated coke by separating carbon from gasification slag, comprising the following steps:

[0061] (1) The raw material of gasification slag is obtained from GSP furnace, its dry basis carbon content is 26.21%, volatile matter is 2.86%, and its specific surface area is 223m 2 .g -1 . The gasification slag is separated from carbon ash by water medium separation, and the gasification slag with a carbon content of 82.44% is obtained, the volatile fraction is 4.75%, and the specific surface area is 286m 2 .g -1 , particle size> 0.074mm.

[0062] (2) Dry the gasification slag with a carbon content of 82.44%, caking coal and long-flame coal at 110°C for 3 hours, then pulverize and sieve respectively to obtain gasification slag carbon powder and caking coal with a particle size of <0.074mm. Then put the three in the kneader according to the mass ratio of gasification slag carbon powder: caking coal powder:...

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Abstract

The present invention provides a method for preparation of desulfurization denitrification molded activated coke by gasification slag separation carbon, and belongs to the field of comprehensive utilization of solid waste in coal chemical industry. The method comprises the following steps that gasification slag with a carbon content of larger than 80% is obtained by conducting carbon ash separating on gasification slag; The gasification slag, caking coal and long flame coal are grinded and then sifted separately until the particle size is less than 0.074 mm. Then the sifted gasification slag,caking coal and long flame coal are mixed and stirred evenly, a binder and water are added, kneading is carried out until the material is uniform, and after molding and drying, a carbonization precursor is obtained. The carbonization precursor is carbonized under the protection of an inert gas atmosphere. The carbonized material is activated with an activator under the protection of an inert gas atmosphere to obtain the desulfurization denitrification molded activated coke. The method is simple, friendly to environment and low in cost and can be used to turn gasification slag into valuables from waste on a large scale. The compressive strength, abrasion resistance and desulfurization and denitrification performance of the obtained activated coke reach GB / T30201-2013 requirements.

Description

technical field [0001] The invention relates to a method for preparing desulfurization and denitrification shaped active coke by separating carbon from gasification slag, and belongs to the field of comprehensive utilization of coal chemical solid waste. Background technique [0002] The application of coal gasification technology is an important part of my country's energy strategy and the source of the modern coal chemical industry. However, the wide application of this technology will also bring serious solid waste pollution. Therefore, the research on coal gasification waste residue reduction and resource utilization technology can not only reduce the processing cost of enterprises, but also solve severe ecological problems, which is the key to both economic and environmental benefits. [0003] According to statistics, in 2016, the country produced about 12 million tons of fine slag and 20 million tons of coarse slag, of which only 3.534 million tons of waste slag was pr...

Claims

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Application Information

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IPC IPC(8): C01B32/324
CPCC01B32/324
Inventor 王建成高艳春马超胡江亮鲍卫仁
Owner TAIYUAN UNIV OF TECH
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