CN114315100B - Fly ash treatment process - Google Patents
Fly ash treatment process Download PDFInfo
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- CN114315100B CN114315100B CN202210016624.7A CN202210016624A CN114315100B CN 114315100 B CN114315100 B CN 114315100B CN 202210016624 A CN202210016624 A CN 202210016624A CN 114315100 B CN114315100 B CN 114315100B
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- China
- Prior art keywords
- fly ash
- treatment process
- chloride ions
- content
- building materials
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- 239000010881 fly ash Substances 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 20
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims abstract description 21
- 239000004566 building material Substances 0.000 claims abstract description 15
- 108090000623 proteins and genes Proteins 0.000 claims abstract description 10
- 102000004169 proteins and genes Human genes 0.000 claims abstract description 10
- 238000003756 stirring Methods 0.000 claims abstract description 10
- 238000002844 melting Methods 0.000 claims abstract description 8
- 230000008018 melting Effects 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims abstract description 7
- 239000008187 granular material Substances 0.000 claims abstract description 5
- 238000004519 manufacturing process Methods 0.000 claims abstract description 5
- 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 9
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 8
- 239000011490 mineral wool Substances 0.000 claims description 7
- 239000011259 mixed solution 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
- 238000005469 granulation Methods 0.000 claims description 2
- 230000003179 granulation Effects 0.000 claims description 2
- 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
- 239000002956 ash Substances 0.000 description 3
- 238000002485 combustion reaction Methods 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
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-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
- 239000003546 flue gas Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 235000009566 rice Nutrition 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 230000002378 acidificating effect Effects 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
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 230000000694 effects Effects 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
- 229910052500 inorganic mineral Inorganic materials 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
- 239000011707 mineral Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000004313 potentiometry Methods 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
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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, which belongs to the technical field of waste treatment. It changes fly ash into nontoxic and harmless various 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 chloride ion content in the fly ash again; s4, adding reagents into the fly ash according to the building materials manufactured as required, fully stirring and granulating; s5, the granulated material enters a preheating rotary kiln for preheating; s6, feeding the preheated material into a high-temperature furnace for high-temperature melting; s7, a wire throwing machine for high-temperature melting is used for making building materials. The invention can effectively reduce the content of chloride ions in the fly ash, can reduce the production cost, is simple to operate, and can be used for preparing building materials after removing harmful substances in the fly ash, thereby reasonably utilizing resources and realizing 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 ash particle that is expelled from the combustion process of fuel (mainly coal). The particle size is generally between 1 and 100 mu m; also known as fly ash or soot, fine solid particulates in flue gas ash produced by the combustion of a fuel, such as fine ash collected from flue gas from coal-fired power plants.
The fly ash produced by the garbage power plant contains various toxic and harmful wastes, and the main components of the fly ash comprise heavy metals, dioxin, arsenic (As), mercury (Hg) and chloride ions (Cl-), so that the environment is polluted, and the existing treatment methods are mostly water-washing burial methods, but the problem that the heavy metals in the later stage benefit to pollute the water body and occupy a large amount of land is solved.
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 non-toxic and harmless building materials.
The technical scheme adopted by the invention is as follows:
a fly ash treatment process comprising the steps of:
s1, detecting the content of chloride ions in fly ash;
s2, adding protein into the fly ash to remove chloride ions;
s3, detecting the chloride ion content in the fly ash again;
s4, adding reagents into the fly ash according to the building materials manufactured as required, fully stirring and granulating;
s5, the granulated material enters a preheating rotary kiln for preheating;
s6, feeding the preheated material into a high-temperature furnace for high-temperature melting;
s7, a wire throwing machine for high-temperature melting is used for making building materials.
And in the step S1, the content of chloride ions in the mixed solution of the fly ash and water is detected by a potential method, and the content of chloride ions in each batch of fly ash is determined.
The step S2 is specifically as follows: fully mixing fly ash with protein to remove chloride ions;
the method comprises the following steps:
s21, placing fly ash into a container;
s22, adding protein and fully stirring;
s23, uniformly stirring and then reacting in a container.
The protein added in the step S22 is plant protein.
The reaction time of the S23 fly ash and the protein in the container is 150-200 min.
In the step 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 step S4, the granulation diameter is larger than 200mm.
In the step S5, the temperature of the preheating rotary kiln is controlled to be 0-300 ℃.
In the step S6, the melting temperature of the high-temperature furnace is 1300-1800 ℃.
In the step S7, when the manufactured building material is mineral wool, the wire 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 invention can effectively reduce the content of chloride ions in the fly ash, can reduce the production cost, is simple to operate, and can be used for preparing building materials after removing harmful substances in the fly ash, thereby reasonably utilizing resources and realizing 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 a 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, then adding plant protein into the container for fully stirring, (the plant protein is a colloid, and generates a coagulation phenomenon when encountering electrolyte such as chloride ion), reacting for 150-200 min in the container after uniformly stirring, filtering clear water after preferably 180min, and detecting the chloride ion content in the fly ash mixed solution, thereby greatly reducing the content.
And then the fly ash mixed solution after the reaction treatment is sent into a stirrer, and reagents are added according to building materials to be manufactured, for example, when mineral wool is manufactured, iron ore powder (iron ore tail powder), fluorite powder, nut shells (rice shells), magnesium oxide (MgO) and calcium sulfate (CaSO 4) are added, and the materials are fully stirred and granulated by a granulator. The diameter of the granules cannot be lower than 20mm, the granules enter a preheating rotary kiln for preheating, the temperature is controlled at 0-300 ℃ so that dioxin is not formed, the pollution to air is avoided, the nut shells and the rice shells are gradually carbonized to absorb harmful gases under the condition of temperature, magnesium oxide has a neutralization effect on sulfur dioxide generated by material combustion, and calcium sulfate absorbs acidic pollutants in fly ash.
The preheated material directly enters a high-temperature furnace, and is melted at a high temperature of 1300-1800 ℃, preferably more than 1450 ℃ and less than 1800 ℃ in an instant. And (5) throwing the magma by a wire throwing machine to form mineral cotton.
The sintering process for preparing the lightweight aggregate is the same as that described above, except that the proportion and stirring are different. The addition of iron ore tail powder is canceled, and silicon carbide is added in proper amount to be used as a foaming agent of the lightweight aggregate. Sintering is carried out by adopting a kiln with the patent number ZL201320536697.5 and the patent name of a tunnel kiln.
It will be understood that the invention has been described in terms of several embodiments, and that various changes and equivalents may be made to these features and embodiments 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 (7)
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;
the method comprises the following steps:
s21, placing fly ash into a container;
s22, adding protein, fully stirring, wherein the protein added in the S22 is plant protein,
s23, uniformly stirring and then reacting in a container, wherein the reaction time of fly ash and protein in the container is 150-200 min;
s3, detecting the chloride ion content in the fly ash again;
s4, adding reagents into the fly ash according to the building materials manufactured as required, fully stirring and granulating;
s5, the granulated material enters a preheating rotary kiln for preheating;
s6, feeding the preheated material into a high-temperature furnace for high-temperature melting;
s7, a wire throwing machine for high-temperature melting is used for making building materials.
2. A fly ash treatment process according to claim 1, characterized in that: and in the step S1, the content of chloride ions in the mixed solution of the fly ash and water is detected by a potential method, and the content of chloride ions in each batch of fly ash is determined.
3. A fly ash treatment process according to claim 1, characterized in that: in the step S4, when the building material is mineral wool, iron ore powder, fluorite powder, magnesium oxide and calcium sulfate are added into the fly ash.
4. A fly ash treatment process according to claim 3, wherein: in the step S4, the granulation diameter is larger than 200mm.
5. A fly ash treatment process according to claim 1, characterized in that: in the step S5, the temperature of the preheating rotary kiln is controlled to be 0-300 ℃.
6. A fly ash treatment process according to claim 1, characterized in that: in the step S6, the melting temperature of the high-temperature furnace is 1300-1800 ℃.
7. A fly ash treatment process according to claim 3, wherein; in the step S7, when the manufactured building material is mineral wool, the wire 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 CN114315100A (en) | 2022-04-12 |
| CN114315100B true 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 |
|---|---|
| CN114315100A (en) | 2022-04-12 |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| 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 | ||
| GR01 | Patent grant |