CN1200876C - Desulfurizing and denitrating active carbon and its production process - Google Patents

Abstract

The present invention relates to active carbon for desulfurization and denitration and a production method thereof, and belongs to active carbon directly prepared from coal and a production method thereof. The present invention mainly solves the technical difficulties of small specific surface area, low strength, undeveloped mesopore, poor effect on the desulfurization and the denitration, etc. existing in the existing active carbon. In order to realize the tasks, the present invention has a technical scheme that the active carbon for desulfurization and denitration is prepared from 62 to 72% of pulverized coal, 25 to 35% of tar and 3 to 5% of water by weight percentage. The preparation method of the active carbon for desulfurization and denitration comprises the following steps: (1), the preparation of the pulverized coal; (2), the preparation of the tar; (3), the preparation of coal paste; (4), formation and granulation; (5), carbonization; (6), activation; (7), oxidation, and the active carbon for desulfurization and denitration is prepared. The active carbon of the present invention has the advantages of large specific surface area, high strength, developed mesopore, rich functional group on surfaces, good effect on the desulfurization and the denitration, multiple regenerating times, etc.

Description

Produce the desulphurization denitration process of active carbon

One, technical field:

The present invention relates to a kind of production desulphurization denitration process of active carbon, it belongs to a kind of production method of directly making gac of coal.

Two, background technology:

The gac of desulphurization denitration use is at present all made with semicoke and binding agent.It produces the desulphurization denitration process of active carbon: the gac of semicoke is done chemical treatment, to increase the ability of surface devulcanization denitration.Though the gac that aforesaid method is produced can desulphurization denitration, this gac exists still that specific surface area is little, intensity is low, mesopore is undeveloped and shortcoming such as desulfurization off sulfide effect difference.

Three, summary of the invention:

The objective of the invention is to solve that the gac specific surface area that existing production process of active carbon exists production is little, intensity is low, mesopore is undeveloped and technological difficulties such as desulfurization off sulfide effect difference and a kind of production desulphurization denitration process of active carbon that the gac specific surface area is big, intensity is high, mesopore is flourishing and desulfurization off sulfide effect is good of production is provided.

In order to realize above-mentioned task, the technical solution used in the present invention is: this production desulphurization denitration process of active carbon, it comprises the following steps:

1), preparation coal dust: at first bituminous coal, coking coal are broken into coal cinder respectively less than 12mm, after then bituminous coal and coking coal being cooperated by following weight percent, grind to form 300～400 purpose coal dusts again, the weight percent of bituminous coal and coking coal is respectively: bituminous coal 60～80%, coking coal 20～40%;

2), preparation tar: earlier the tar temperature is adjusted to 50～85 ℃, then stirs, then tar is mixed with asphalt content and is 50～72% mixed tar;

3), make coal cream: coal dust, the tar for preparing and the water of preparation are made coal cream by stirring in the following weight percent adding mixing machine, and the weight percent of coal dust, tar and water is respectively: coal dust 62～72%, tar 25～35%, water 3～5%;

4), molding, granulating: the coal cream of making sent in the shaper that pressure is 8.0～16.0Mpa make strip particle;

5), charing: it is that charing was come out of the stove in 1.5～3.0 hours in 300～800 ℃ the charring furnace that the particle of moulding is added temperature, makes carbonized material;

6), activation: it is that 700～910 ℃, pressure are in the activation furnace of 50～150Pa that the carbonized material made is added temperature, is that 840～1100 ℃ steam activation was come out of the stove in 2～3 hours with temperature, makes that composing lives expects;

7), oxidation: the tax that will make is lived and is expected to add in the oxidized still gac that oxygen level is 12～21% in stove, the energy desulphurization denitration was made in oxidation in 1.5～3.0 hours when furnace temperature was 340～510 ℃.

Because the present invention adopted technique scheme, therefore compare with background technology, the gac specific surface area with production is big, intensity is high, mesopore is flourishing, functional group is rich on the surface, desulfurization off sulfide effect is good and regeneration times more than etc. advantage.

Four, embodiment:

Embodiment 1:

Desulphurization denitration gac in the present embodiment, it is made by coal dust, tar and water, and its weight percent is:

Coal dust 70% tar 25% water 5%.

Above-mentioned coal dust is made by bituminous coal and coking coal, and its weight percent is:

Bituminous coal 60% coking coal 40%.

The making method of above-mentioned gac is: it comprises the following steps:

1), preparation coal dust: at first bituminous coal, coking coal are broken into coal cinder respectively, after then bituminous coal and coking coal being cooperated by above-mentioned weight percent, grind to form 300 purpose coal dusts again less than 12mm;

2), preparation tar: earlier the tar temperature is adjusted to 55 ℃, then stirs, then tar being mixed with asphalt content is that 50% mixed tar and the temperature that makes it remain on 55 ℃;

3), make coal cream: coal dust, the tar for preparing and the water of preparation are made coal cream by stirring in the above-mentioned weight percent adding mixing machine;

4), molding, granulating: the coal cream of making sent in the shaper that pressure is 10Mpa make strip particle;

5), charing: it is that carbonization temperature rises to 800 ℃ by 300 ℃ in 300 ℃ the charring furnace that the particle of moulding is added temperature in, and charing was come out of the stove in 3 hours, made carbonized material;

6), activation: it is that 700 ℃, pressure are in the activation furnace of 50Pa that the carbonized material made is added temperature, is that 840 ℃ steam activation was come out of the stove in 3 hours with temperature, makes that composing lives expects;

7), oxidation: the tax that will make is lived and is expected to add in the oxidized still gac that oxygen level is 16% in stove, the energy desulphurization denitration was made in oxidation in 2 hours when furnace temperature was 400 ℃.

Embodiment 2:

Desulphurization denitration gac in the present embodiment, it is made by coal dust, tar and water, and its weight percent is:

Coal dust 62% tar 35% water 3%.

Above-mentioned coal dust is made by bituminous coal and coking coal, and its weight percent is:

Bituminous coal 80% coking coal 20%.

The making method of above-mentioned gac is: it comprises the following steps:

1), preparation coal dust: at first bituminous coal, coking coal are broken into coal cinder respectively, after then bituminous coal and coking coal being cooperated by above-mentioned weight percent, grind to form 400 purpose coal dusts again less than 12mm;

2), preparation tar: earlier the tar temperature is adjusted to 50 ℃, then stirs, then tar being mixed with asphalt content is that 60% mixed tar and the temperature that makes it remain on 50 ℃;

3), make coal cream: coal dust, the tar for preparing and the water of preparation are made coal cream by stirring in the above-mentioned weight percent adding mixing machine;

4), molding, granulating: the coal cream of making sent in the shaper that pressure is 8.0Mpa make strip particle;

5), charing: it is that carbonization temperature rises to 800 ℃ by 300 ℃ in 300 ℃ the charring furnace that the particle of moulding is added temperature in, and charing was come out of the stove in 2 hours, made carbonized material;

6), activation: it is that 800 ℃, pressure are in the activation furnace of 100Pa that the carbonized material made is added temperature, is that 970 ℃ steam activation was come out of the stove in 2.5 hours with temperature, makes that composing lives expects;

7), oxidation: the tax that will make is lived and is expected to add in the oxidized still gac that oxygen level is 12% in stove, the energy desulphurization denitration was made in oxidation in 3.0 hours when furnace temperature was 340 ℃.

Embodiment 3:

Desulphurization denitration gac in the present embodiment, it is made by coal dust, tar and water, and its weight percent is:

Coal dust 72% tar 25% water 3%.

Above-mentioned coal dust is made by bituminous coal and coking coal, and its weight percent is:

Bituminous coal 70% coking coal 30%.

The making method of above-mentioned gac is: it comprises the following steps:

1), preparation coal dust: at first bituminous coal, coking coal are broken into coal cinder respectively, after then bituminous coal and coking coal being cooperated by above-mentioned weight percent, grind to form 350 purpose coal dusts again less than 12mm;

2), preparation tar: earlier the tar temperature is adjusted to 85 ℃, then stirs, then tar being mixed with asphalt content is that 72% mixed tar and the temperature that makes it remain on 85 ℃;

3), make coal cream: coal dust, the tar for preparing and the water of preparation are made coal cream by stirring in the above-mentioned weight percent adding mixing machine;

4), molding, granulating: the coal cream of making sent in the shaper that pressure is 16.0Mpa make strip particle;

5), charing: it is that carbonization temperature rises to 800 ℃ by 300 ℃ in 300 ℃ the charring furnace that the particle of moulding is added temperature in, and charing was come out of the stove in 1.5 hours, made carbonized material;

6), activation: it is that 910 ℃, pressure are in the activation furnace of 150Pa that the carbonized material made is added temperature, is that 1100 ℃ steam activation was come out of the stove in 2 hours with temperature, makes that composing lives expects;

7), oxidation: the tax that will make is lived and is expected to add in the oxidized still gac that oxygen level is 21% in stove, the energy desulphurization denitration was made in oxidation in 1.5 hours when furnace temperature was 510 ℃.

Embodiment 4:

Desulphurization denitration gac in the present embodiment, it is made by coal dust, tar and water, and its weight percent is:

Coal dust 67% tar 29% water 4%.

Above-mentioned coal dust is made by bituminous coal and coking coal, and its weight percent is:

Bituminous coal 65% coking coal 35%.

The making method of above-mentioned gac is: it comprises the following steps:

1), preparation coal dust: at first bituminous coal, coking coal are broken into coal cinder respectively, after then bituminous coal and coking coal being cooperated by above-mentioned weight percent, grind to form 360 purpose coal dusts again less than 12mm;

2), preparation tar: earlier the tar temperature is adjusted to 60 ℃, then stirs, then tar being mixed with asphalt content is that 65% mixed tar and the temperature that makes it remain on 60 ℃;

3), make coal cream: coal dust, the tar for preparing and the water of preparation are made coal cream by stirring in the above-mentioned weight percent adding mixing machine;

4), molding, granulating: the coal cream of making sent in the shaper that pressure is 14Mpa make strip particle;

5), charing: it is that carbonization temperature rises to 800 ℃ by 300 ℃ in 300 ℃ the charring furnace that the particle of moulding is added temperature in, and charing was come out of the stove in 2.5 hours, made carbonized material;

6), activation: it is that 820 ℃, pressure are in the activation furnace of 90Pa that the carbonized material made is added temperature, is that 1000 ℃ steam activation was come out of the stove in 2.3 hours with temperature, makes that composing lives expects;

7), oxidation: the tax that will make is lived and is expected to add in the oxidized still gac that oxygen level is 15% in stove, the energy desulphurization denitration was made in oxidation in 1.8 hours when furnace temperature was 420 ℃.

Claims (1)

1, a kind of production desulphurization denitration process of active carbon, it is characterized in that: it comprises the following steps:

1), preparation coal dust: at first bituminous coal, coking coal are broken into coal cinder respectively less than 12mm, after then bituminous coal and coking coal being cooperated by following weight percent, grind to form 300～400 purpose coal dusts again, the weight percent of bituminous coal and coking coal is respectively: bituminous coal 60～80%, coking coal 20～40%;

2), preparation tar: earlier the tar temperature is adjusted to 50～85 ℃, then stirs, then tar is mixed with asphalt content and is 50～72% mixed tar;

3), make coal cream: coal dust, the tar for preparing and the water of preparation are made coal cream by stirring in the following weight percent adding mixing machine, and the weight percent of coal dust, tar and water is respectively: coal dust 62～72%, tar 25～35%, water 3～5%;

4), molding, granulating: the coal cream of making sent in the shaper that pressure is 8.0～16.0Mpa make strip particle;

5), charing: it is that charing was come out of the stove in 1.5～3.0 hours in 300～800 ℃ the charring furnace that the particle of moulding is added temperature, makes carbonized material;

6), activation: it is that 700～910 ℃, pressure are in the activation furnace of 50～150Pa that the carbonized material made is added temperature, is that 840～1100 ℃ steam activation was come out of the stove in 2～3 hours with temperature, makes that composing lives expects;

7), oxidation: the tax that will make is lived and is expected to add in the oxidized still gac that oxygen level is 12～21% in stove, the energy desulphurization denitration was made in oxidation in 1.5～3.0 hours when furnace temperature was 340～510 ℃.