CN114315100A - Fly ash treatment process - Google Patents
Fly ash treatment process Download PDFInfo
- Publication number
- CN114315100A CN114315100A CN202210016624.7A CN202210016624A CN114315100A CN 114315100 A CN114315100 A CN 114315100A CN 202210016624 A CN202210016624 A CN 202210016624A CN 114315100 A CN114315100 A CN 114315100A
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- CN
- China
- Prior art keywords
- fly ash
- treatment process
- process according
- chloride ions
- protein
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- 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.)
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- 239000010881 fly ash Substances 0.000 title claims abstract description 61
- 238000000034 method Methods 0.000 title claims abstract description 24
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims abstract description 22
- 239000004566 building material Substances 0.000 claims abstract description 15
- 108090000623 proteins and genes Proteins 0.000 claims abstract description 11
- 102000004169 proteins and genes Human genes 0.000 claims abstract description 11
- 238000003756 stirring Methods 0.000 claims abstract description 11
- 238000002844 melting Methods 0.000 claims abstract description 9
- 230000008018 melting Effects 0.000 claims abstract description 9
- 238000004519 manufacturing process Methods 0.000 claims abstract description 8
- 239000008187 granular material Substances 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 7
- 239000003153 chemical reaction reagent Substances 0.000 claims abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- 235000018102 proteins Nutrition 0.000 claims description 10
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 9
- 239000011490 mineral wool Substances 0.000 claims description 8
- 239000011259 mixed solution Substances 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 7
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 239000000395 magnesium oxide Substances 0.000 claims description 5
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 5
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 108010064851 Plant Proteins Proteins 0.000 claims description 4
- 235000021118 plant-derived protein Nutrition 0.000 claims description 4
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 3
- 239000010436 fluorite Substances 0.000 claims description 3
- 238000004313 potentiometry Methods 0.000 claims description 3
- 239000011810 insulating material Substances 0.000 claims description 2
- 230000035484 reaction time Effects 0.000 claims description 2
- 239000002699 waste material Substances 0.000 abstract description 3
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 231100000252 nontoxic Toxicity 0.000 abstract description 2
- 230000003000 nontoxic effect Effects 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- 238000002485 combustion reaction Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 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 2
- 241000209094 Oryza Species 0.000 description 2
- 235000007164 Oryza sativa Nutrition 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 239000002956 ash Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 239000010903 husk Substances 0.000 description 2
- 235000009566 rice Nutrition 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 229910052925 anhydrite Inorganic materials 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Processing Of Solid Wastes (AREA)
Abstract
A fly ash treatment process, belonging to the technical field of waste treatment. It changes the fly ash into non-toxic and harmless building materials. It comprises the following steps: s1, detecting the content of chloride ions in fly ash; s2, adding protein into the fly ash to remove chloride ions; s3, detecting the content of chloride ions in the fly ash again; s4, adding a reagent into the fly ash according to the building materials to be manufactured, fully stirring and granulating; s5, feeding the granulated material into a preheating rotary kiln for preheating; s6, feeding the preheated material into a high-temperature furnace for high-temperature melting; s7, high-temperature melting is carried out to manufacture building materials by using a throwing machine. The method can effectively reduce the content of chloride ions in the fly ash, can reduce the production cost, is simple to operate, removes harmful substances in the fly ash, prepares the fly ash into building materials, reasonably utilizes resources, and achieves the purposes of energy conservation and environmental protection.
Description
Technical Field
The invention belongs to the technical field of waste treatment, and particularly relates to a fly ash treatment process.
Background
Fly ash is a tiny soot particle emitted during the combustion of fuel (mainly coal). The particle size is generally 1-100 μm; also known as fly ash or fly ash, is the fine solid particles in the ash of flue gases produced by the combustion of fuels, such as the fine ash collected from flue gases in coal-fired power plants.
The fly ash generated by a garbage power plant contains various toxic and harmful wastes, the main components of the fly ash comprise heavy metal, dioxin, arsenic (As), mercury (Hg) and chloride ions (Cl-), the environment can be polluted, the existing treatment methods are mostly water-washing burying methods, but the problem that the heavy metal in the later period is beneficial to polluting water bodies can be caused, and meanwhile, a large amount of land is occupied.
Disclosure of Invention
The invention aims to solve the problems in the background technology, and further provides a fly ash treatment process, which changes fly ash into a plurality of nontoxic and harmless building materials.
The technical scheme adopted by the invention is as follows:
a fly ash treatment process comprises the following steps:
s1, detecting the content of chloride ions in fly ash;
s2, adding protein into the fly ash to remove chloride ions;
s3, detecting the content of chloride ions in the fly ash again;
s4, adding a reagent into the fly ash according to the building materials to be manufactured, fully stirring and granulating;
s5, feeding the granulated material into a preheating rotary kiln for preheating;
s6, feeding the preheated material into a high-temperature furnace for high-temperature melting;
s7, high-temperature melting is carried out to manufacture building materials by using a throwing machine.
And in the step S1, detecting the chloride ion content in the mixed solution of the fly ash and the water by a potentiometric method, and determining the chloride ion content of each batch of fly ash.
The S2 specifically includes: the fly ash and the protein are fully mixed to remove chloride ions;
the method comprises the following steps:
s21, putting the fly ash into a container;
s22, adding protein and fully stirring;
and S23, reacting in a container after uniformly stirring.
The protein added in the S22 is plant protein.
The reaction time of the S23 fly ash and the protein in the container is 150 min-200 min.
In S4, when the building material is mineral wool, iron ore powder, fluorite powder, magnesium oxide and calcium sulfate are added into the fly ash.
In the S4, the diameter of the granules is more than 200 mm.
In S5, the temperature of the preheating rotary kiln is controlled to be 0-300 ℃.
In the S6, the melting temperature of the high-temperature furnace is 1300-1800 ℃.
And in the S7, when the manufactured building material is mineral wool, the throwing machine is used for manufacturing the building heat-insulating material mineral wool.
Compared with the prior art, the invention has the following beneficial effects:
the method can effectively reduce the content of chloride ions in the fly ash, can reduce the production cost, is simple to operate, removes harmful substances in the fly ash, prepares the fly ash into building materials, reasonably utilizes resources, and achieves the purposes of energy conservation and environmental protection.
Drawings
FIG. 1 is a flow chart of the present invention;
Detailed Description
Preparation process
Firstly, pouring fly ash into a certain amount of water to form fly ash mixed solution, then detecting the chloride ion content in the fly ash mixed solution (potentiometric method) to determine the chloride ion content of each batch of fly ash, putting the fly ash mixed solution into a container, adding plant protein for fully stirring (the plant protein is colloid, and can generate agglomeration phenomenon when meeting chlorine ion and other electrolytes), after uniformly stirring, reacting in the container for 150 min-200 min, preferably, filtering clear water after 180min, and then detecting the chloride ion content in the fly ash mixed solution, wherein the content is greatly reduced.
And then feeding the fly ash mixed solution after the reaction treatment into a stirrer, adding a reagent according to the required building materials, for example, when mineral wool is manufactured, adding iron ore powder (iron ore tailing powder), fluorite powder, nut shells (rice husks), magnesium oxide (MgO) and calcium sulfate (CaSO4), fully stirring, and granulating by a granulator. The diameter of the granules can not be less than 20mm, the granules are preheated in a preheating rotary kiln, the temperature is controlled to be 0-300 ℃, dioxin can not be formed, air pollution is avoided, the nut shells and the rice husks are gradually carbonized and adsorb harmful gas under the condition of temperature, magnesium oxide has a neutralizing effect on sulfur dioxide generated by material combustion, and calcium sulfate absorbs acid pollutants in fly ash.
The preheated material directly enters a high-temperature furnace, the high-temperature melting is carried out at 1300-1800 ℃, preferably above 1450 ℃ and below 1800 ℃, and the material is instantaneously melted. The magma is thrown out by a throwing machine to form mineral wool.
The sintering process for manufacturing the lightweight aggregate is the same as the above, but the proportion and the stirring are different. The addition of iron ore tailings is eliminated, and a proper amount of silicon carbide is added to serve as a foaming agent of the lightweight aggregate. Sintering was carried out using a kiln having the patent number ZL201320536697.5 and the patent name tunnel kiln.
It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. A fly ash treatment process is characterized in that: the method comprises the following steps:
s1, detecting the content of chloride ions in fly ash;
s2, adding protein into the fly ash to remove chloride ions;
s3, detecting the content of chloride ions in the fly ash again;
s4, adding a reagent into the fly ash according to the building materials to be manufactured, fully stirring and granulating;
s5, feeding the granulated material into a preheating rotary kiln for preheating;
s6, feeding the preheated material into a high-temperature furnace for high-temperature melting;
s7, high-temperature melting is carried out to manufacture building materials by using a throwing machine.
2. A fly ash treatment process according to claim 1, characterized in that: and in the step S1, detecting the chloride ion content in the mixed solution of the fly ash and the water by a potentiometric method, and determining the chloride ion content of each batch of fly ash.
3. A fly ash treatment process according to claim 1, characterized in that: the S2 specifically includes: the fly ash and the protein are fully mixed to remove chloride ions;
the method comprises the following steps:
s21, putting the fly ash into a container;
s22, adding protein and fully stirring;
and S23, reacting in a container after uniformly stirring.
4. A fly ash treatment process according to claim 3, characterized in that: the protein added in the S22 is plant protein.
5. A fly ash treatment process according to claim 4, wherein: the reaction time of the S23 fly ash and the protein in the container is 150 min-200 min.
6. A fly ash treatment process according to claim 1, characterized in that: in S4, when the building material is mineral wool, iron ore powder, fluorite powder, magnesium oxide and calcium sulfate are added into the fly ash.
7. A fly ash treatment process according to claim 6, wherein: in the S4, the diameter of the granules is more than 200 mm.
8. A fly ash treatment process according to claim 1, characterized in that: in S5, the temperature of the preheating rotary kiln is controlled to be 0-300 ℃.
9. A fly ash treatment process according to claim 1, characterized in that: in the S6, the melting temperature of the high-temperature furnace is 1300-1800 ℃.
10. A fly ash treatment process according to claim 6, wherein; and in the S7, when the manufactured building material is mineral wool, the throwing machine is used for manufacturing the building heat-insulating material mineral wool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210016624.7A CN114315100B (en) | 2022-01-07 | 2022-01-07 | Fly ash treatment process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210016624.7A CN114315100B (en) | 2022-01-07 | 2022-01-07 | Fly ash treatment process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114315100A true CN114315100A (en) | 2022-04-12 |
| CN114315100B CN114315100B (en) | 2024-01-30 |
Family
ID=81024046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210016624.7A Active CN114315100B (en) | 2022-01-07 | 2022-01-07 | Fly ash treatment process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114315100B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4442215A (en) * | 1980-02-11 | 1984-04-10 | Anders Marius Vognsen | Element-rich composition |
| CN106867458A (en) * | 2017-02-09 | 2017-06-20 | 王建伟 | A kind of chemical filming agent for solidifying function with surface heavy metal chelating |
| CN109909266A (en) * | 2019-03-28 | 2019-06-21 | 北京科技大学 | With the method for chlorine and heavy metal in organic composting fermentation liquid removing flying ash |
| CN110451701A (en) * | 2019-07-29 | 2019-11-15 | 苏州飞辉环境科技有限公司 | The minimizing technology of heavy metal in a kind of flying ash leachate |
| CN111112283A (en) * | 2019-12-16 | 2020-05-08 | 清华大学 | Method for mineralizing and consolidating flying ash generated by burning garbage |
| CN112029813A (en) * | 2020-08-26 | 2020-12-04 | 四川大学 | Method for evaluating leaching toxicity of municipal waste incineration fly ash |
-
2022
- 2022-01-07 CN CN202210016624.7A patent/CN114315100B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4442215A (en) * | 1980-02-11 | 1984-04-10 | Anders Marius Vognsen | Element-rich composition |
| CN106867458A (en) * | 2017-02-09 | 2017-06-20 | 王建伟 | A kind of chemical filming agent for solidifying function with surface heavy metal chelating |
| CN109909266A (en) * | 2019-03-28 | 2019-06-21 | 北京科技大学 | With the method for chlorine and heavy metal in organic composting fermentation liquid removing flying ash |
| CN110451701A (en) * | 2019-07-29 | 2019-11-15 | 苏州飞辉环境科技有限公司 | The minimizing technology of heavy metal in a kind of flying ash leachate |
| CN111112283A (en) * | 2019-12-16 | 2020-05-08 | 清华大学 | Method for mineralizing and consolidating flying ash generated by burning garbage |
| CN112029813A (en) * | 2020-08-26 | 2020-12-04 | 四川大学 | Method for evaluating leaching toxicity of municipal waste incineration fly ash |
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| Publication number | Publication date |
|---|---|
| CN114315100B (en) | 2024-01-30 |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20230628 Address after: 22/F, Building T-A, No. 1294, Chuangxin Road, Songbei District, Harbin, Heilongjiang, 150000 Applicant after: Harbin Qiyu New Material Technology Co.,Ltd. Address before: 157000 building 6, Deming Street government, Xingping Road, Aimin District, Mudanjiang City, Heilongjiang Province Applicant before: Li Zengjun |
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| GR01 | Patent grant | ||
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