CN110918069A - Flue gas adsorbent and preparation method thereof - Google Patents
Flue gas adsorbent and preparation method thereof Download PDFInfo
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- CN110918069A CN110918069A CN201911284827.9A CN201911284827A CN110918069A CN 110918069 A CN110918069 A CN 110918069A CN 201911284827 A CN201911284827 A CN 201911284827A CN 110918069 A CN110918069 A CN 110918069A
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- 239000003463 adsorbent Substances 0.000 title claims abstract description 39
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 239000003546 flue gas Substances 0.000 title claims abstract description 32
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 239000010902 straw Substances 0.000 claims abstract description 45
- 238000002156 mixing Methods 0.000 claims abstract description 21
- 239000002893 slag Substances 0.000 claims abstract description 20
- 238000001035 drying Methods 0.000 claims abstract description 18
- 239000012065 filter cake Substances 0.000 claims abstract description 18
- 239000011268 mixed slurry Substances 0.000 claims abstract description 18
- 238000003756 stirring Methods 0.000 claims abstract description 18
- 239000010881 fly ash Substances 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims abstract description 17
- 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 abstract description 15
- 239000002994 raw material Substances 0.000 claims abstract description 15
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims abstract description 13
- 239000000347 magnesium hydroxide Substances 0.000 claims abstract description 13
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims abstract description 13
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims abstract description 11
- 238000001291 vacuum drying Methods 0.000 claims abstract description 10
- 238000010000 carbonizing Methods 0.000 claims abstract description 9
- 238000001914 filtration Methods 0.000 claims abstract description 9
- 239000000843 powder Substances 0.000 claims abstract description 9
- 239000011790 ferrous sulphate Substances 0.000 claims description 11
- 235000003891 ferrous sulphate Nutrition 0.000 claims description 11
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 11
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 claims description 11
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 11
- 229910000360 iron(III) sulfate Inorganic materials 0.000 claims description 11
- 240000006394 Sorghum bicolor Species 0.000 claims description 9
- 235000011684 Sorghum saccharatum Nutrition 0.000 claims description 9
- 239000011259 mixed solution Substances 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 8
- 241000209140 Triticum Species 0.000 claims description 7
- 235000021307 Triticum Nutrition 0.000 claims description 7
- 240000008042 Zea mays Species 0.000 claims description 5
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 claims description 5
- 235000002017 Zea mays subsp mays Nutrition 0.000 claims description 5
- 235000005822 corn Nutrition 0.000 claims description 5
- 239000010907 stover Substances 0.000 claims 2
- 239000002910 solid waste Substances 0.000 abstract description 5
- 238000000227 grinding Methods 0.000 abstract 1
- UPKIHOQVIBBESY-UHFFFAOYSA-N magnesium;carbanide Chemical compound [CH3-].[CH3-].[Mg+2] UPKIHOQVIBBESY-UHFFFAOYSA-N 0.000 abstract 1
- 238000000034 method Methods 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 235000019402 calcium peroxide Nutrition 0.000 description 2
- 229910052681 coesite Inorganic materials 0.000 description 2
- 229910052593 corundum Inorganic materials 0.000 description 2
- 229910052906 cristobalite Inorganic materials 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000002440 industrial waste Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 229910052682 stishovite Inorganic materials 0.000 description 2
- 229910052905 tridymite Inorganic materials 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910001845 yogo sapphire Inorganic materials 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 241000282414 Homo sapiens Species 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/24—Naturally occurring macromolecular compounds, e.g. humic acids or their derivatives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/04—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
- B01J20/041—Oxides or hydroxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
- B01J20/08—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04 comprising aluminium oxide or hydroxide; comprising bauxite
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/103—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate comprising silica
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/12—Naturally occurring clays or bleaching earth
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
Landscapes
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Life Sciences & Earth Sciences (AREA)
- Dispersion Chemistry (AREA)
- Geochemistry & Mineralogy (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a flue gas adsorbent and a preparation method thereof, wherein the flue gas adsorbent is prepared from the following raw materials in parts by weight: fly ash, metakaolin, straws, sulfate, magnesium hydroxide and carbide slag. Drying and carbonizing the straws in sequence; respectively drying and crushing the fly ash, the metakaolin, the carbide slag and the carbonized straws, and then adding the materials into a planetary ball mill for grinding to obtain a mixed sample; mixing the mixed sample with sulfate and stirring to obtain mixed slurry; and mixing the mixed slurry with magnesium hydroxide, stirring, filtering to retain a filter cake, and performing vacuum drying on the filter cake to obtain adsorbent powder. The four raw materials are industrial solid wastes, have wide sources and large quantity, can reduce the cost of the raw materials, and also solve the problem of pollution caused by stacking and processing the crop straws.
Description
Technical Field
The invention belongs to the technical field of adsorbents, relates to a flue gas adsorbent and further relates to a preparation method of the adsorbent.
Background
The atmospheric environmental pollution problem in China is serious. Taking the flue gas emission problem of a factory as an example, the main pollutants SO2 and NOx in the sintering flue gas emitted by steel enterprises are one of pollution gas sources which have great harm to the health of human beings, animals and plants, and a large amount of SO2 and NOx can directly cause the atmospheric pollution problems such as acid rain, photochemical smog, haze and the like. Therefore, the reasonable control and treatment of the emission of harmful gases in the flue gas are not only practical problems which are urgently needed to be solved by the enterprises at present, but also important development directions for protecting the ecological environment.
With the continuous improvement of the industrialization level in China, a large amount of industrial waste, particularly industrial waste slag, is taken as solid waste to be stacked and treated on a large scale, so that not only is the waste of resources caused, but also the soil and water resources are greatly damaged, and the maintenance cost of an enterprise is increased. If the method can be well utilized, the waste of the solid waste resources can be prevented, and meanwhile, the method has positive significance for improving the ecological environment.
Currently, the most industrially applied flue gas desulfurization, denitrification and purification technologies mainly include an activated carbon (coke) adsorption technology and a flue gas catalytic oxidation technology. However, these flue gas purification techniques use activated carbon or high-purity chemicals as the main component of the adsorbent (containing catalyst). The raw materials and the method are limited by the problems of high cost, relatively complicated actual removal process, relatively low denitration efficiency, huge equipment operation and maintenance cost and the like, and can cause secondary pollution to the environment.
Disclosure of Invention
The invention aims to provide a flue gas adsorbent which can reduce the harm of sintering flue gas to the environment and does not cause secondary pollution to the environment.
The technical scheme adopted by the invention is that the flue gas adsorbent is prepared from the following raw materials in parts by weight: 30-40 parts of fly ash, 25-30 parts of metakaolin, 20-25 parts of straws, 3-5 parts of sulfate, 10-15 parts of magnesium hydroxide and 5-10 parts of carbide slag.
The invention is also characterized in that:
the straw comprises one or more of corn straw, wheat straw, sorghum straw and dry branches.
The sulfate is a mixed solution of ferric sulfate and ferrous sulfate, and the volume ratio of the ferrous sulfate to the ferric sulfate is 2: 1-4: 1.
The invention also aims to provide a preparation method of the flue gas adsorbent.
The invention adopts another technical scheme that a preparation method of a flue gas adsorbent comprises the following steps:
step 1, drying and carbonizing straws in sequence;
step 2, respectively drying and crushing the fly ash, the metakaolin, the carbide slag and the carbonized straws, and then adding the materials into a planetary ball mill to grind the materials until the particle size is less than 0.074mm to obtain a mixed sample;
step 3, mixing the mixed sample with sulfate and stirring to obtain mixed slurry;
and 4, mixing the mixed slurry with magnesium hydroxide, stirring, filtering to retain a filter cake, and carrying out vacuum drying on the filter cake under the conditions that the vacuum degree is-80 to-100 kPa and the temperature is 100 to 150 ℃ to obtain adsorbent powder.
The invention has the beneficial effects that:
the flue gas adsorbent disclosed by the invention takes fly ash, metakaolin, straws and carbide slag as main raw materials, the four raw materials are industrial solid wastes, the raw materials are wide in source and large in amount, the raw material cost can be reduced, and the pollution problem caused by stacking treatment of crop straws is also solved; the fly ash contains rich SiO2 and Al2O3, the carbide slag provides sufficient basic components such as CaO, and CaO2 contained in the carbide slag has strong oxidizing property and can enhance the chemical adsorption capacity of the adsorbent; the preparation method of the flue gas adsorbent has the advantages of simple process and low equipment requirement, and is suitable for industrial mass production.
Detailed Description
The present invention will be described in detail with reference to the following embodiments.
The invention relates to a flue gas adsorbent which is prepared from the following raw materials in parts by weight: 30-40 parts of fly ash, 25-30 parts of metakaolin, 20-25 parts of straws, 3-5 parts of sulfate, 10-15 parts of magnesium hydroxide and 5-10 parts of carbide slag.
The straw comprises one or more of corn straw, wheat straw, sorghum straw and dry branches.
The sulfate is a mixed solution of ferric sulfate and ferrous sulfate, and the volume ratio of the ferrous sulfate to the ferric sulfate is 2: 1-4: 1.
A preparation method of a flue gas adsorbent comprises the following steps:
step 1, drying and carbonizing straws in sequence;
step 2, respectively drying and crushing the fly ash, the metakaolin, the carbide slag and the carbonized straws, and then adding the materials into a planetary ball mill to grind the materials until the particle size is less than 0.074mm to obtain a mixed sample;
step 3, mixing the mixed sample with sulfate and stirring to obtain mixed slurry;
and 4, mixing the mixed slurry with magnesium hydroxide, stirring, filtering to retain a filter cake, and carrying out vacuum drying on the filter cake under the conditions that the vacuum degree is-80 to-100 kPa and the temperature is 100 to 150 ℃ to obtain adsorbent powder.
Through the mode, the flue gas adsorbent disclosed by the invention takes the fly ash, the metakaolin, the straws and the carbide slag as main raw materials, the four raw materials are industrial solid wastes, the raw materials are wide in source and large in quantity, the raw material cost can be reduced, and the pollution problem caused by stacking treatment of crop straws is also solved; the fly ash contains rich SiO2 and Al2O3, the carbide slag provides sufficient basic components such as CaO, and CaO2 contained in the carbide slag has strong oxidizing property and can enhance the chemical adsorption capacity of the adsorbent; the preparation method of the flue gas adsorbent has the advantages of simple process and low equipment requirement, and is suitable for industrial mass production.
Example 1
A preparation method of a flue gas adsorbent comprises the following steps:
step 1, drying and carbonizing wheat straws and sorghum straws and then mixing the wheat straws and the sorghum straws;
step 2, respectively drying and crushing 30 parts of fly ash, 25 parts of metakaolin, 10 parts of carbide slag and 20 parts of carbonized straws, and then adding the materials into a planetary ball mill to grind the materials to a particle size of 0.06mm to obtain a mixed sample;
step 3, mixing and stirring the mixed sample and a mixed solution of ferrous sulfate and ferric sulfate in a volume ratio of 2:1 to obtain a mixed slurry;
and 4, mixing the mixed slurry with magnesium hydroxide, stirring, filtering to retain a filter cake, and performing vacuum drying on the filter cake under the conditions that the vacuum degree is-80 kPa and the temperature is 100 ℃ to obtain adsorbent powder.
Example 2
A preparation method of a flue gas adsorbent comprises the following steps:
step 1, drying and carbonizing dry branches and sorghum straws and then mixing;
step 2, respectively drying and crushing 32 parts of fly ash, 25 parts of metakaolin, 6 parts of carbide slag and 21 parts of carbonized straws, and then adding the materials into a planetary ball mill to grind the materials to a particle size of 0.07mm to obtain a mixed sample;
step 3, mixing and stirring the mixed sample and a mixed solution of ferrous sulfate and ferric sulfate in a volume ratio of 2:1 to obtain a mixed slurry;
and 4, mixing the mixed slurry with magnesium hydroxide, stirring, filtering to retain a filter cake, and performing vacuum drying on the filter cake under the conditions that the vacuum degree is-85 kPa and the temperature is 110 ℃ to obtain adsorbent powder.
Example 3
A preparation method of a flue gas adsorbent comprises the following steps:
step 1, drying and carbonizing wheat straws, sorghum straws and dry branches, and then mixing;
step 2, respectively drying and crushing 35 parts of fly ash, 26 parts of metakaolin, 7 parts of carbide slag and 25 parts of carbonized straws, and then adding the materials into a planetary ball mill to grind the materials until the particle size is 0.052, so as to obtain a mixed sample;
step 3, mixing and stirring the mixed sample and a mixed solution of ferrous sulfate and ferric sulfate in a volume ratio of 3:1 to obtain a mixed slurry;
and 4, mixing the mixed slurry with magnesium hydroxide, stirring, filtering to retain a filter cake, and performing vacuum drying on the filter cake under the conditions that the vacuum degree is-95 kPa and the temperature is 108 ℃ to obtain adsorbent powder.
Example 4
The straw comprises corn straw, wheat straw, sorghum straw and dry branches.
A preparation method of a flue gas adsorbent comprises the following steps:
step 1, drying and carbonizing corn straws;
step 2, respectively drying and crushing 40 parts of fly ash, 30 parts of metakaolin, 5 parts of carbide slag and 22 parts of carbonized straws, and then adding the materials into a planetary ball mill to grind the materials until the particle size is 0.068, so as to obtain a mixed sample;
step 3, mixing and stirring the mixed sample and a mixed solution of ferrous sulfate and ferric sulfate in a volume ratio of 4:1 to obtain a mixed slurry;
and 4, mixing the mixed slurry with magnesium hydroxide, stirring, filtering to retain a filter cake, and performing vacuum drying on the filter cake under the conditions that the vacuum degree is-95 kPa and the temperature is 130 ℃ to obtain adsorbent powder.
Example 5
A preparation method of a flue gas adsorbent comprises the following steps:
step 1, drying and carbonizing sorghum straws;
step 2, respectively drying and crushing 38 parts of fly ash, 30 parts of metakaolin, 9 parts of carbide slag and 25 parts of carbonized straws, and then adding the materials into a planetary ball mill to grind the materials to a particle size of 0.05mm to obtain a mixed sample;
step 3, mixing and stirring the mixed sample and a mixed solution of ferrous sulfate and ferric sulfate in a volume ratio of 2.5:1 to obtain a mixed slurry;
and 4, mixing the mixed slurry with magnesium hydroxide, stirring, filtering to retain a filter cake, and performing vacuum drying on the filter cake under the conditions that the vacuum degree is-88 kPa and the temperature is 140 ℃ to obtain adsorbent powder.
Claims (5)
1. The flue gas adsorbent is characterized by being prepared from the following raw materials in parts by weight: 30-40 parts of fly ash, 25-30 parts of metakaolin, 20-25 parts of straws, 3-5 parts of sulfate, 10-15 parts of magnesium hydroxide and 5-10 parts of carbide slag.
2. The flue gas adsorbent of claim 1, wherein the straw comprises one or more of corn stover, wheat straw, sorghum stover, and dried branches.
3. The flue gas adsorbent of claim 1, wherein the sulfate is a mixed solution of ferric sulfate and ferrous sulfate, and the volume ratio of the ferrous sulfate to the ferric sulfate is 2: 1-4: 1.
4. The preparation method of the flue gas adsorbent is characterized by comprising the following steps of:
step 1, drying and carbonizing straws in sequence;
step 2, respectively drying and crushing the fly ash, the metakaolin, the carbide slag and the carbonized straws, and then adding the materials into a planetary ball mill to grind the materials until the particle size is less than 0.074mm to obtain a mixed sample;
step 3, mixing the mixed sample with sulfate and stirring to obtain mixed slurry;
and 4, mixing the mixed slurry with magnesium hydroxide, stirring, filtering to retain a filter cake, and performing vacuum drying on the filter cake to obtain adsorbent powder.
5. The preparation method of the flue gas adsorbent according to claim 4, wherein the vacuum degree of the vacuum drying in the step 4 is-80 kPa to-100 kPa, and the temperature is 100 ℃ to 150 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201911284827.9A CN110918069A (en) | 2019-12-13 | 2019-12-13 | Flue gas adsorbent and preparation method thereof |
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| CN201911284827.9A CN110918069A (en) | 2019-12-13 | 2019-12-13 | Flue gas adsorbent and preparation method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102284272A (en) * | 2011-06-23 | 2011-12-21 | 重庆大学 | Fly ash-based smoke demercuration adsorbent |
| CN106000073A (en) * | 2016-06-30 | 2016-10-12 | 内蒙古阜丰生物科技有限公司 | Environmental protection process for treating boiler flue gas |
| CN108837802A (en) * | 2018-06-27 | 2018-11-20 | 重庆渝茁科技有限公司 | Incineration flue gas of household garbage compound adsorbent and preparation method thereof |
| CN109967032A (en) * | 2018-12-28 | 2019-07-05 | 沈阳工程学院 | A kind of method of flyash and stalk joint preparation industrial wastewater adsorbent |
| CN110508236A (en) * | 2019-09-26 | 2019-11-29 | 辽宁科技大学 | A kind of microwave cooperating processing waste residue prepares high-efficiency sintered flue gas adsorbent and method |
-
2019
- 2019-12-13 CN CN201911284827.9A patent/CN110918069A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102284272A (en) * | 2011-06-23 | 2011-12-21 | 重庆大学 | Fly ash-based smoke demercuration adsorbent |
| CN106000073A (en) * | 2016-06-30 | 2016-10-12 | 内蒙古阜丰生物科技有限公司 | Environmental protection process for treating boiler flue gas |
| CN108837802A (en) * | 2018-06-27 | 2018-11-20 | 重庆渝茁科技有限公司 | Incineration flue gas of household garbage compound adsorbent and preparation method thereof |
| CN109967032A (en) * | 2018-12-28 | 2019-07-05 | 沈阳工程学院 | A kind of method of flyash and stalk joint preparation industrial wastewater adsorbent |
| CN110508236A (en) * | 2019-09-26 | 2019-11-29 | 辽宁科技大学 | A kind of microwave cooperating processing waste residue prepares high-efficiency sintered flue gas adsorbent and method |
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Application publication date: 20200327 |