CN112479206A - Preparation method of high-performance active coke for flue gas purification - Google Patents
Preparation method of high-performance active coke for flue gas purification Download PDFInfo
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- CN112479206A CN112479206A CN202011306961.7A CN202011306961A CN112479206A CN 112479206 A CN112479206 A CN 112479206A CN 202011306961 A CN202011306961 A CN 202011306961A CN 112479206 A CN112479206 A CN 112479206A
- Authority
- CN
- China
- Prior art keywords
- active coke
- flue gas
- gas purification
- coke
- coal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000571 coke Substances 0.000 title claims abstract description 51
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 239000003546 flue gas Substances 0.000 title claims abstract description 18
- 238000000746 purification Methods 0.000 title claims abstract description 16
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 239000003245 coal Substances 0.000 claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000002994 raw material Substances 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 11
- 239000000843 powder Substances 0.000 claims abstract description 11
- 238000004939 coking Methods 0.000 claims abstract description 10
- 239000010426 asphalt Substances 0.000 claims abstract description 9
- 239000002802 bituminous coal Substances 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 9
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000003830 anthracite Substances 0.000 claims abstract description 8
- 239000011230 binding agent Substances 0.000 claims abstract description 7
- 230000003213 activating effect Effects 0.000 claims abstract description 5
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 238000001035 drying Methods 0.000 claims abstract description 4
- 238000000227 grinding Methods 0.000 claims abstract description 4
- 238000004898 kneading Methods 0.000 claims abstract description 4
- 238000002156 mixing Methods 0.000 claims abstract description 4
- 238000010000 carbonizing Methods 0.000 claims abstract description 3
- 230000004913 activation Effects 0.000 claims description 11
- 238000003763 carbonization Methods 0.000 claims description 9
- 239000007789 gas Substances 0.000 claims description 7
- 239000005995 Aluminium silicate Substances 0.000 claims description 6
- 235000012211 aluminium silicate Nutrition 0.000 claims description 6
- 239000005539 carbonized material Substances 0.000 claims description 6
- 239000011261 inert gas Substances 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 6
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000006477 desulfuration reaction Methods 0.000 abstract description 2
- 230000023556 desulfurization Effects 0.000 abstract description 2
- 238000003912 environmental pollution Methods 0.000 abstract description 2
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 12
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 8
- 239000003344 environmental pollutant Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 231100000719 pollutant Toxicity 0.000 description 5
- 230000002195 synergetic effect Effects 0.000 description 4
- 239000002817 coal dust Substances 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012458 free base Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/312—Preparation
- C01B32/318—Preparation characterised by the starting materials
- C01B32/33—Preparation characterised by the starting materials from distillation residues of coal or petroleum; from petroleum acid sludge
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/312—Preparation
- C01B32/336—Preparation characterised by gaseous activating agents
Abstract
The invention provides a preparation method of high-performance active coke for flue gas purification, which comprises the following steps: s1, respectively grinding coking coal, bituminous coal, anthracite and asphalt into powder, and fully and uniformly mixing; s2, adding a binder and water into the uniformly mixed materials, and kneading to form a kneaded material; s3, granulating the kneaded material to prepare active coke raw material; s4, naturally drying the active coke raw material; s5, carbonizing and activating the naturally dried active coke raw material by using a carbonization-activation integrated device in an inert atmosphere; and S6, cooling the carbonized and activated active coke in an inert atmosphere to obtain the finished active coke. The active coke produced by the method has the advantages of wear resistance of more than 97%, pressure resistance of more than 40daN, desulfurization of more than 20mg/g and denitration of more than 60%, and can effectively reduce the technical cost of active coke cooperative treatment and reduce environmental pollution.
Description
Technical Field
The invention relates to the technical field of active coke preparation, in particular to a preparation method of high-performance active coke for flue gas purification.
Background
Coal is a main energy source in China, and is a main fuel particularly for the industries of thermal power, metallurgy and the like. During the combustion of coal, a large amount of SO is generated2And NOX. According to statistics, the emission amount of sulfur dioxide in 2017 is 875.4 ten thousand tons, the emission amount of nitrogen oxides is 1258.8 ten thousand tons, wherein the emission amount of industrial sulfur dioxide accounts for about 80% of the total emission amount, and the emission amount of nitrogen oxides accounts for about 60% of the total emission amount. Therefore, reducing the emission of sulfur dioxide and nitrogen oxides industrially is an important measure for controlling atmospheric pollution. At present, the most common method for controlling the emission of pollutants in flue gas is to adopt tail end treatment, namely, tail gas purification treatment is discharged after reaching the standard.
The active coke synergistic treatment technology utilizes active carbon (coke) with larger specific surface area, abundant pore structure and surface functional groups, can adsorb pollutants in reaction, can play a role in catalysis, and can synergistically treat sulfur dioxide, nitrogen oxide, heavy metal and dioxin in flue gas. In addition, water is not basically consumed in the pollutant removing process, wastewater is not basically generated, low-temperature denitration can be performed, and the by-product sulfuric acid has high utilization value and good development prospect. However, for the process operation, the influence of the active coke property is large, and the active coke loss accounts for more than 50% of the operation cost. Therefore, the improvement of the performance of the active coke is beneficial to reducing the cost, and has important significance for the development and the application of the active coke synergistic treatment technology.
At present, few patents simultaneously give consideration to the production cost, the production process and the pollutant synergistic treatment performance of the active coke, so that a preparation method of the active coke, which has the advantages of lower production cost, relatively simple production process and higher pollutant synergistic treatment efficiency, needs to be developed.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a preparation method of high-performance active coke for purifying flue gas.
The invention is realized by the following steps:
the invention provides a preparation method of high-performance active coke for flue gas purification, which comprises the following steps:
s1, respectively grinding coking coal, bituminous coal, anthracite and asphalt into powder, and fully and uniformly mixing;
s2, adding a binder and water into the uniformly mixed materials, and kneading to form a kneaded material;
s3, granulating the kneaded material to prepare active coke raw material;
s4, naturally drying the active coke raw material;
s5, carbonizing and activating the naturally dried active coke raw material by using a carbonization-activation integrated device in an inert atmosphere;
and S6, cooling the carbonized and activated active coke in an inert atmosphere to obtain the finished active coke.
Further, the carbonization-activation integrated device is a rotary kiln, an inert gas introducing device and an activated gas injection device are arranged at the front section of the rotary kiln, and N is used as inert gas2The activating gas adopts water vapor.
Further, in step S1, the ratio of coking coal, bituminous coal and anthracite is (10-30): (0-20): (30-75) adding asphalt according to 5-30% of the mass of the coal powder mixture.
Further, in the step S5, the carbonization temperature is 500-700 ℃, the carbonization time is 1-1.5h, the activation temperature is 800-1000 ℃, and the activation time is 1-2 h.
Further, N2The flow rate is 1.0-5.0l/min/kg of carbonized material, and the water vapor injection amount is 1.0-5.0ml/min/100g of carbonized material.
Further, the binder is tar or kaolin binder.
Furthermore, the addition amount of the tar or kaolin adhesive is 10-30% of the total mass of the coal powder, and the addition amount of the water is 10-30% of the total mass of the coal powder.
The invention has the following beneficial effects:
the invention develops a preparation method of high-performance active coke for flue gas purification, which can effectively reduce the technical cost of active coke cooperative treatment and reduce environmental pollution.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention provides a preparation method of high-performance active coke for flue gas purification, which specifically comprises the following steps:
s1, preparing active coke by using coking coal, bituminous coal, anthracite and asphalt, and grinding the materials into fine powder with the granularity of more than 200 meshes by using a coal mill, wherein the coal mill needs to have better wear resistance, such as Raymond mill; fully and uniformly mixing the ground fine powder, wherein the mass fractions of coking coal, bituminous coal and anthracite are respectively 10-30%, 0-20% and 30-75%, and asphalt is added according to 5-30% of the mass of the pulverized coal mixture;
s2, putting the uniformly mixed coal dust and asphalt into a kneader, adding a tar or kaolin adhesive and water, and kneading for not less than 5min, wherein the addition amount of the tar or kaolin adhesive is 10-30% of the total mass of the coal dust, and the addition amount of the water is 10-30% of the total mass of the coal dust;
s3, adding the kneaded material into a granulator for granulation, wherein the particle size of the granulated active coke raw material is 9 +/-2 mm;
s4, naturally drying the active coke raw material for 24-48 h;
s5, carrying out carbonization and activation on the active coke raw material which is naturally dried and has the water content lower than 15% in an inert atmosphere by using a carbonization and activation integrated device; the carbonization-activation integrated device is a rotary kiln, an inert gas introducing device and an activation gas injection device are arranged at the front section of the rotary kiln, the inert gas adopts N2, the activation gas adopts water vapor, the flow rate of N2 is 1.0-5.0l/min/kg of carbonized materials, and the injection amount of the water vapor is 1.0-5.0ml/min/100g of the carbonized materials; the carbonization and activation device can be provided with a temperature control device to control the carbonization and activation temperature so as to improve the quality of the active coke, wherein the carbonization temperature is controlled to be 500-fold sand-baked at 700 ℃ for 1-1.5h, the activation temperature is controlled to be 800-fold sand-baked at 1000 ℃ for 1-2 h.
And S6, cooling the carbonized and activated active coke in an inert atmosphere to obtain the finished active coke.
The scheme adopts coking coal, bituminous coal, anthracite and asphalt which are reasonably proportioned as raw materials, wherein the caking index of the coking coal is more than 55, the content of dry ash-free base volatile matter in the bituminous coal is more than 20%, the coking coal is kneaded, granulated, naturally air-dried, carbonized and activated, and cooled to prepare high-performance active coke, and the produced active coke has the advantages of wear resistance of more than 97%, pressure resistance of more than 40daN, desulfurization of more than 20mg/g, denitration of more than 60%, good flue gas purification control effect, production cost lower than market price and good economic benefit.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. A preparation method of high-performance active coke for flue gas purification is characterized by comprising the following steps: s1, respectively grinding coking coal, bituminous coal, anthracite and asphalt into powder, and fully and uniformly mixing;
s2, adding a binder and water into the uniformly mixed materials, and kneading to form a kneaded material;
s3, granulating the kneaded material to prepare active coke raw material;
s4, naturally drying the active coke raw material;
s5, carbonizing and activating the naturally dried active coke raw material by using a carbonization-activation integrated device in an inert atmosphere;
and S6, cooling the carbonized and activated active coke in an inert atmosphere to obtain the finished active coke.
2. The flue gas purification agent as claimed in claim 1The preparation method of the high-performance active coke is characterized by comprising the following steps: the carbonization-activation integrated device is a rotary kiln, an inert gas introducing device and an activated gas injection device are arranged at the front section of the rotary kiln, and N is used as inert gas2The activating gas adopts water vapor.
3. The method for preparing high-performance activated coke for flue gas purification according to claim 2, wherein: in the step S1, the ratio of coking coal, bituminous coal and anthracite is (10-30): (0-20): (30-75) adding asphalt according to 5-30% of the mass of the coal powder mixture.
4. The method for preparing high-performance activated coke for flue gas purification according to claim 2, wherein: in the step S5, the carbonization temperature is 500-700 ℃, the carbonization time is 1-1.5h, the activation temperature is 800-1000 ℃, and the activation time is 1-2 h.
5. The method for preparing high-performance activated coke for flue gas purification according to claim 2, wherein: n is a radical of2The flow rate is 1.0-5.0l/min/kg of carbonized material, and the water vapor injection amount is 1.0-5.0ml/min/100g of carbonized material.
6. The method for preparing high-performance activated coke for flue gas purification according to claim 2, wherein: the binder is tar or kaolin binder.
7. The method for preparing high-performance activated coke for flue gas purification according to claim 6, wherein the method comprises the following steps: the addition amount of the tar or kaolin adhesive is 10-30% of the total mass of the coal powder, and the addition amount of the water is 10-30% of the total mass of the coal powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011306961.7A CN112479206A (en) | 2020-11-20 | 2020-11-20 | Preparation method of high-performance active coke for flue gas purification |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011306961.7A CN112479206A (en) | 2020-11-20 | 2020-11-20 | Preparation method of high-performance active coke for flue gas purification |
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| CN112479206A true CN112479206A (en) | 2021-03-12 |
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| CN202011306961.7A Pending CN112479206A (en) | 2020-11-20 | 2020-11-20 | Preparation method of high-performance active coke for flue gas purification |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114195148A (en) * | 2021-12-16 | 2022-03-18 | 煤炭科学技术研究院有限公司 | Preparation method of high-strength active coke for flue gas desulfurization and denitrification |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5525196A (en) * | 1991-10-21 | 1996-06-11 | Mitsui Mining Co., Ltd. | Process for producing formed activated coke |
| US5840651A (en) * | 1993-11-19 | 1998-11-24 | Mitsui Mining Co., Ltd. | Process for the production of activated coke for simultaneous desulfurization and denitrification |
| JP2001294414A (en) * | 2000-04-12 | 2001-10-23 | Nippon Steel Corp | Manufacturing method of activated coke having high strength and high adsorpability |
| CN101239719A (en) * | 2008-03-24 | 2008-08-13 | 邹炎 | Method for preparing smoke treating and water source purifying double-purpose active coke and products thereof |
| CN103880007A (en) * | 2014-04-16 | 2014-06-25 | 邹炎 | Activated carbon or activated coke prepared from oily sludge and preparation device and method thereof |
| CN109319780A (en) * | 2018-11-07 | 2019-02-12 | 宁夏翔泰新材料科技有限公司 | A method of producing the activated coke added without coal tar using upright carbonization furnace |
| CN109607528A (en) * | 2018-11-29 | 2019-04-12 | 北京清新环境技术股份有限公司 | A kind of carbon-based material and preparation method thereof based on carbonaceous dust collection powder |
| CN111054310A (en) * | 2020-01-06 | 2020-04-24 | 西安建筑科技大学 | Active coke for flue gas desulfurization and preparation method thereof |
| CN111924841A (en) * | 2020-07-17 | 2020-11-13 | 中冶南方都市环保工程技术股份有限公司 | Method for recycling active coke desulfurization and denitrification waste coke |
-
2020
- 2020-11-20 CN CN202011306961.7A patent/CN112479206A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5525196A (en) * | 1991-10-21 | 1996-06-11 | Mitsui Mining Co., Ltd. | Process for producing formed activated coke |
| US5840651A (en) * | 1993-11-19 | 1998-11-24 | Mitsui Mining Co., Ltd. | Process for the production of activated coke for simultaneous desulfurization and denitrification |
| JP2001294414A (en) * | 2000-04-12 | 2001-10-23 | Nippon Steel Corp | Manufacturing method of activated coke having high strength and high adsorpability |
| CN101239719A (en) * | 2008-03-24 | 2008-08-13 | 邹炎 | Method for preparing smoke treating and water source purifying double-purpose active coke and products thereof |
| CN103880007A (en) * | 2014-04-16 | 2014-06-25 | 邹炎 | Activated carbon or activated coke prepared from oily sludge and preparation device and method thereof |
| CN109319780A (en) * | 2018-11-07 | 2019-02-12 | 宁夏翔泰新材料科技有限公司 | A method of producing the activated coke added without coal tar using upright carbonization furnace |
| CN109607528A (en) * | 2018-11-29 | 2019-04-12 | 北京清新环境技术股份有限公司 | A kind of carbon-based material and preparation method thereof based on carbonaceous dust collection powder |
| CN111054310A (en) * | 2020-01-06 | 2020-04-24 | 西安建筑科技大学 | Active coke for flue gas desulfurization and preparation method thereof |
| CN111924841A (en) * | 2020-07-17 | 2020-11-13 | 中冶南方都市环保工程技术股份有限公司 | Method for recycling active coke desulfurization and denitrification waste coke |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114195148A (en) * | 2021-12-16 | 2022-03-18 | 煤炭科学技术研究院有限公司 | Preparation method of high-strength active coke for flue gas desulfurization and denitrification |
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Application publication date: 20210312 |