CN111097129A - Heavy metal stabilizer for treating waste incineration fly ash and use method thereof - Google Patents
Heavy metal stabilizer for treating waste incineration fly ash and use method thereof Download PDFInfo
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- CN111097129A CN111097129A CN201811257503.1A CN201811257503A CN111097129A CN 111097129 A CN111097129 A CN 111097129A CN 201811257503 A CN201811257503 A CN 201811257503A CN 111097129 A CN111097129 A CN 111097129A
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- phosphate
- fly ash
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- 239000003381 stabilizer Substances 0.000 title claims abstract description 43
- 239000010881 fly ash Substances 0.000 title claims abstract description 40
- 229910001385 heavy metal Inorganic materials 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000004056 waste incineration Methods 0.000 title claims abstract description 20
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 24
- LWIHDJKSTIGBAC-UHFFFAOYSA-K tripotassium phosphate Chemical compound [K+].[K+].[K+].[O-]P([O-])([O-])=O LWIHDJKSTIGBAC-UHFFFAOYSA-K 0.000 claims abstract description 24
- 239000000126 substance Substances 0.000 claims abstract description 20
- 238000002156 mixing Methods 0.000 claims abstract description 17
- 229910019142 PO4 Inorganic materials 0.000 claims abstract description 15
- 239000002738 chelating agent Substances 0.000 claims abstract description 14
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims abstract description 14
- 239000010452 phosphate Substances 0.000 claims abstract description 14
- 239000003463 adsorbent Substances 0.000 claims abstract description 13
- 230000003213 activating effect Effects 0.000 claims abstract description 12
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000001913 cellulose Substances 0.000 claims abstract description 11
- 229920002678 cellulose Polymers 0.000 claims abstract description 11
- 229910052751 metal Inorganic materials 0.000 claims abstract description 11
- 239000002184 metal Substances 0.000 claims abstract description 11
- 150000003013 phosphoric acid derivatives Chemical class 0.000 claims abstract description 7
- KMQAPZBMEMMKSS-UHFFFAOYSA-K calcium;magnesium;phosphate Chemical compound [Mg+2].[Ca+2].[O-]P([O-])([O-])=O KMQAPZBMEMMKSS-UHFFFAOYSA-K 0.000 claims abstract description 6
- ZPWVASYFFYYZEW-UHFFFAOYSA-L dipotassium hydrogen phosphate Chemical compound [K+].[K+].OP([O-])([O-])=O ZPWVASYFFYYZEW-UHFFFAOYSA-L 0.000 claims abstract description 6
- 229910000396 dipotassium phosphate Inorganic materials 0.000 claims abstract description 6
- 235000019797 dipotassium phosphate Nutrition 0.000 claims abstract description 6
- 229910000402 monopotassium phosphate Inorganic materials 0.000 claims abstract description 6
- 235000019796 monopotassium phosphate Nutrition 0.000 claims abstract description 6
- GNSKLFRGEWLPPA-UHFFFAOYSA-M potassium dihydrogen phosphate Chemical compound [K+].OP(O)([O-])=O GNSKLFRGEWLPPA-UHFFFAOYSA-M 0.000 claims abstract description 6
- 229910000404 tripotassium phosphate Inorganic materials 0.000 claims abstract description 6
- 235000019798 tripotassium phosphate Nutrition 0.000 claims abstract description 6
- 238000003756 stirring Methods 0.000 claims description 25
- 239000000203 mixture Substances 0.000 claims description 20
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 15
- 239000011259 mixed solution Substances 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 239000013522 chelant Substances 0.000 claims description 10
- 238000000197 pyrolysis Methods 0.000 claims description 10
- HYHCSLBZRBJJCH-UHFFFAOYSA-M sodium hydrosulfide Chemical compound [Na+].[SH-] HYHCSLBZRBJJCH-UHFFFAOYSA-M 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 238000007580 dry-mixing Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- DPLVEEXVKBWGHE-UHFFFAOYSA-N potassium sulfide Chemical compound [S-2].[K+].[K+] DPLVEEXVKBWGHE-UHFFFAOYSA-N 0.000 claims description 5
- 229920006395 saturated elastomer Polymers 0.000 claims description 5
- HYHCSLBZRBJJCH-UHFFFAOYSA-N sodium polysulfide Chemical compound [Na+].S HYHCSLBZRBJJCH-UHFFFAOYSA-N 0.000 claims description 5
- 230000000087 stabilizing effect Effects 0.000 claims description 5
- 230000008901 benefit Effects 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract 1
- 239000010865 sewage Substances 0.000 abstract 1
- 239000010802 sludge Substances 0.000 abstract 1
- 235000021317 phosphate Nutrition 0.000 description 10
- 239000000047 product Substances 0.000 description 8
- 239000004568 cement Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 description 2
- KXDHJXZQYSOELW-UHFFFAOYSA-N Carbamic acid Chemical class NC(O)=O KXDHJXZQYSOELW-UHFFFAOYSA-N 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Natural products NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- JGIATAMCQXIDNZ-UHFFFAOYSA-N calcium sulfide Chemical compound [Ca]=S JGIATAMCQXIDNZ-UHFFFAOYSA-N 0.000 description 1
- 230000009920 chelation Effects 0.000 description 1
- 238000005008 domestic process Methods 0.000 description 1
- 150000002466 imines Chemical class 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 159000000014 iron salts Chemical class 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 150000003235 pyrrolidines Chemical class 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 229910052979 sodium sulfide Inorganic materials 0.000 description 1
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 150000004763 sulfides Chemical class 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D3/00—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances
- A62D3/30—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents
- A62D3/33—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents by chemical fixing the harmful substance, e.g. by chelation or complexation
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D3/00—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances
- A62D3/40—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by heating to effect chemical change, e.g. pyrolysis
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
- A62D2101/08—Toxic combustion residues, e.g. toxic substances contained in fly ash from waste incineration
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D2203/00—Aspects of processes for making harmful chemical substances harmless, or less harmful, by effecting chemical change in the substances
- A62D2203/02—Combined processes involving two or more distinct steps covered by groups A62D3/10 - A62D3/40
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a heavy metal stabilizer for treating waste incineration fly ash and a using method thereof, wherein the heavy metal stabilizer for sewage treatment sludge comprises the following components in percentage by weight: phosphate salt: 10-20 parts of silicate: 5-10 parts of inorganic alkaline substance: 5-10 parts of adsorbent, 5-8 parts of stabilizer, and activating agent: 1-2 parts of cellulose: 1-5 parts of curing agent: 10-20 parts of metal chelating agent: 20-30 parts of phosphate, wherein the phosphate is one or more of calcium magnesium phosphate, tripotassium phosphate, monopotassium phosphate and dipotassium phosphate, and the invention has the beneficial effects that: the heavy metal stabilizer for treating the waste incineration fly ash and the using method thereof are characterized in that the stabilizer formed by mixing phosphate, inorganic alkaline substances, an adsorbent, a stabilizer, an activating agent and the like is fully contacted with the incineration fly ash, so that the heavy metal stabilizer has a certain treatment effect on the fly ash, has no secondary pollution and no public nuisance, is simple in using method and low in cost, accords with energy-saving and carbon-reducing benefits, has economic benefits, and has good application prospects.
Description
Technical Field
The invention relates to the field of heavy metal stabilizers, in particular to a heavy metal stabilizer for treating waste incineration fly ash and a using method thereof.
Background
The domestic process for treating the waste incineration fly ash mostly adopts chelation and solidification treatment, and mainly adopts a solidification method which takes an organic chelating agent as a main part and takes an inorganic curing agent such as cement as an auxiliary part. It is a treatment method that cement, organic chelating agent solution and fly ash are mixed, stirred, bonded and solidified into hard blocks.
The common chemical applied to heavy metal stabilization can be divided into inorganic chemical and organic chemical, the organic chemical mainly adopts macromolecules as chelating agents, and the organic chemical mainly comprises pyrrolidine series, imine series, thiourea, carbamic acid series and the like, and the action principle is that heavy metal is contained in the molecule to generate insoluble reactant, so that the purpose of heavy metal stabilization is achieved. The inorganic chemicals mainly comprise substances such as lime, sulfides (sodium sulfide, sodium hydrosulfide and calcium sulfide), phosphates, iron salts and the like, and the heavy metals are stabilized mainly by methods such as pH value adjustment, adsorption, ion exchange, precipitate generation and the like. It has great pollution and low benefit.
Disclosure of Invention
The invention aims to provide a heavy metal stabilizer for treating waste incineration fly ash and a using method thereof, so as to solve the problems in the background technology.
In order to solve the technical problems, the invention provides a heavy metal stabilizer for treating waste incineration fly ash, which comprises the following components in percentage by weight: phosphate salt: 10-20 parts of silicate: 5-10 parts of inorganic alkaline substance: 5-10 parts of adsorbent, 5-8 parts of stabilizer, and activating agent: 1-2 parts of cellulose: 1-5 parts of sulfide, 10-20 parts of organic chelate: 5-20 parts of curing agent: 10-20 parts of a metal chelating agent: 20-30 parts of water: 40-50 parts.
The application method of the heavy metal stabilizer for treating the waste incineration fly ash comprises the following steps:
the first step is as follows: firstly, mixing a heavy metal stabilizer consisting of phosphate, silicate, inorganic alkaline substances, sulfide, organic chelate and metal chelating agent in a ratio of 2:1:1:1: 2 with garbage incineration fly ash in a certain ratio, placing the mixture into a stirrer for dry mixing at a stirring speed of 150 plus materials for 200 r/min for 30 minutes, and stirring until the mixture is uniformly mixed to obtain a mixture.
The second step is that: adding an adsorbent and a stabilizer in a ratio of 1:1 into the mixture obtained in the first step, stabilizing heavy metals in the incineration fly ash, mixing and stirring, adding a certain amount of water to enable the incineration fly ash to reach a saturated state, stirring again for 20min, uniformly stirring, then maintaining for at least 3-4 hours.
The third step: then adding the cellulose, the activating agent and the curing agent into the mixed solution obtained in the second step, then placing the mixed solution into a stirrer to be stirred for 10 minutes at the speed of 100-120r/min, uniformly mixing the mixed solution,
and then heating until the water is evaporated to dryness to obtain a mixed dry material.
The fourth step: and finally, feeding the obtained mixed dry material into a pyrolyzer, carrying out pyrolysis treatment until no pyrolysis gas is generated, obtaining a pyrolyzed product, and after cooling, carrying out landfill treatment on the pyrolyzed product.
The phosphate is one or more of calcium magnesium phosphate, tripotassium phosphate, monopotassium phosphate and dipotassium phosphate.
The sulfide is one or two of sodium hydrosulfide, sodium polysulfide and potassium sulfide.
The invention has the beneficial effects that: the heavy metal stabilizer for treating the waste incineration fly ash and the using method thereof are characterized in that the stabilizer formed by mixing phosphate, inorganic alkaline substances, an adsorbent, a stabilizer, an activator and the like is fully contacted with the incineration fly ash, so that the fly ash is treated to a certain extent, secondary pollution and pollution are avoided, the using method is simple, the cost is low, the energy-saving and carbon-reducing benefits are met, the economic benefits are achieved, the application prospect is good, the using amount is small, the cost is low, the performance is obvious, various heavy metals can be stably treated by multiple mechanisms, and the heavy metal stabilizer has great popularization and application values.
Detailed Description
The following further description is provided in conjunction with the detailed description, but the detailed description below should not be construed as limiting the invention. Various modifications and variations obvious to those skilled in the art, which can be made on the basis of the present invention, should be within the scope of the present invention.
Example 1:
the invention provides a heavy metal stabilizer for treating waste incineration fly ash, which comprises the following components in percentage by weight: phosphate salt: 10-20 parts of silicate: 5-10 parts of inorganic alkaline substance: 5-10 parts of adsorbent, 5-8 parts of stabilizer, and activating agent: 1-2 parts of cellulose: 1-5 parts of sulfide, 10-20 parts of organic chelate: 5-20 parts of curing agent: 10-20 parts of a metal chelating agent: 20-30 parts of water: 40-50 parts.
The application method of the heavy metal stabilizer for treating the waste incineration fly ash comprises the following steps:
the first step is as follows: firstly, mixing a heavy metal stabilizer consisting of phosphate, silicate, inorganic alkaline substances, sulfide, organic chelate and metal chelating agent in a ratio of 2:1:1:1: 2 with garbage incineration fly ash in a certain ratio, placing the mixture into a stirrer for dry mixing at a stirring speed of 150 plus materials for 200 r/min for 30 minutes, and stirring until the mixture is uniformly mixed to obtain a mixture.
The second step is that: adding an adsorbent and a stabilizer in a ratio of 1:1 into the mixture obtained in the first step, stabilizing heavy metals in the incineration fly ash, mixing and stirring, adding a certain amount of water to enable the incineration fly ash to reach a saturated state, stirring again for 20min, uniformly stirring, then maintaining for at least 3-4 hours.
The third step: then adding the cellulose, the activating agent and the curing agent into the mixed solution obtained in the second step, then placing the mixed solution into a stirrer to be stirred for 10 minutes at the speed of 100-120r/min, uniformly mixing the mixed solution,
and then heating until the water is evaporated to dryness to obtain a mixed dry material.
The fourth step: and finally, feeding the obtained mixed dry material into a pyrolyzer, carrying out pyrolysis treatment until no pyrolysis gas is generated, obtaining a pyrolyzed product, and after cooling, carrying out landfill treatment on the pyrolyzed product.
The phosphate is one or more of calcium magnesium phosphate, tripotassium phosphate, monopotassium phosphate and dipotassium phosphate.
The sulfide is one or two of sodium hydrosulfide, sodium polysulfide and potassium sulfide.
Example 2:
the invention provides a heavy metal stabilizer for treating waste incineration fly ash, which comprises the following components in percentage by weight: phosphate salt: 10-20 parts of silicate: 5-10 parts of inorganic alkaline substance: 5-10 parts of adsorbent, 5-8 parts of stabilizer, and activating agent: 1-2 parts of cellulose: 1-5 parts of sulfide, 10-20 parts of organic chelate: 5-20 parts of curing agent: 10-20 parts of a metal chelating agent: 20-30 parts of water: 40-50 parts.
The application method of the heavy metal stabilizer for treating the waste incineration fly ash comprises the following steps:
the first step is as follows: firstly, mixing a heavy metal stabilizer consisting of phosphate, silicate, inorganic alkaline substances, sulfide, organic chelate and metal chelating agent in a ratio of 2:1:2:1:1:2 with garbage incineration fly ash in a certain ratio, placing the mixture into a stirrer for dry mixing at a stirring speed of 150 plus materials for 200 r/min for 20 minutes, and stirring until the mixture is uniformly mixed to obtain a mixture.
The second step is that: adding an adsorbent and a stabilizer in a ratio of 1:1 into the mixture obtained in the first step, stabilizing heavy metals in the incineration fly ash, mixing and stirring, adding a certain amount of water to enable the incineration fly ash to reach a saturated state, stirring again for 20min, uniformly stirring, then maintaining for at least 3-4 hours.
The third step: then adding the cellulose, the activating agent and the curing agent into the mixed solution obtained in the second step, then placing the mixed solution into a stirrer to be stirred for 20 minutes at the speed of 120-180r/min, uniformly mixing the mixed solution,
and then heating until the water is evaporated to dryness to obtain a mixed dry material.
The fourth step: and finally, feeding the obtained mixed dry material into a pyrolyzer, carrying out pyrolysis treatment until no pyrolysis gas is generated, obtaining a pyrolyzed product, and after cooling, carrying out landfill treatment on the pyrolyzed product.
The phosphate is one or more of calcium magnesium phosphate, tripotassium phosphate, monopotassium phosphate and dipotassium phosphate.
The sulfide is one or two of sodium hydrosulfide, sodium polysulfide and potassium sulfide.
Example 3:
the invention provides a heavy metal stabilizer for treating waste incineration fly ash, which comprises the following components in percentage by weight: phosphate salt: 10-20 parts of silicate: 5-10 parts of inorganic alkaline substance: 5-10 parts of adsorbent, 5-8 parts of stabilizer, and activating agent: 1-2 parts of cellulose: 1-5 parts of sulfide, 10-20 parts of organic chelate: 5-20 parts of curing agent: 10-20 parts of a metal chelating agent: 20-30 parts of water: 40-50 parts.
The application method of the heavy metal stabilizer for treating the waste incineration fly ash comprises the following steps:
the first step is as follows: firstly, mixing a heavy metal stabilizer consisting of phosphate, silicate, inorganic alkaline substances, sulfide, organic chelate and metal chelating agent in a ratio of 2:1:1:2:1:2 with garbage incineration fly ash in a certain ratio, placing the mixture into a stirrer for dry mixing at a stirring speed of 180 plus materials for 200 r/min for 30 minutes, and stirring until the mixture is uniformly mixed to obtain a mixture.
The second step is that: adding an adsorbent and a stabilizer in a ratio of 1:2 into the mixture obtained in the first step, stabilizing heavy metals in the incineration fly ash, mixing and stirring, adding a certain amount of water to enable the incineration fly ash to reach a saturated state, stirring again for 20min, uniformly stirring, then maintaining for at least 3-4 hours.
The third step: then adding the cellulose, the activating agent and the curing agent into the mixed solution obtained in the second step, then placing the mixed solution into a stirrer to be stirred for 20 minutes at the speed of 100-150r/min, uniformly mixing the mixed solution,
and then heating until the water is evaporated to dryness to obtain a mixed dry material.
The fourth step: and finally, feeding the obtained mixed dry material into a pyrolyzer, carrying out pyrolysis treatment until no pyrolysis gas is generated, obtaining a pyrolyzed product, and after cooling, carrying out landfill treatment on the pyrolyzed product.
The phosphate is one or more of calcium magnesium phosphate, tripotassium phosphate, monopotassium phosphate and dipotassium phosphate.
The sulfide is one or two of sodium hydrosulfide, sodium polysulfide and potassium sulfide.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (4)
1. A heavy metal stabilizer for treating waste incineration fly ash is characterized by comprising the following components in percentage by weight: phosphate salt: 10-20 parts of silicate: 5-10 parts of inorganic alkaline substance: 5-10 parts of adsorbent, 5-8 parts of stabilizer, and activating agent: 1-2 parts of cellulose: 1-5 parts of sulfide, 10-20 parts of organic chelate: 5-20 parts of curing agent: 10-20 parts of a metal chelating agent: 20-30 parts of water: 40-50 parts.
2. The use method of the heavy metal stabilizer for treating the fly ash from waste incineration as claimed in claim 1, wherein: the method comprises the following steps:
the first step is as follows: firstly, mixing a heavy metal stabilizer consisting of phosphate, silicate, inorganic alkaline substances, sulfide, organic chelate and metal chelating agent in a ratio of 2:1:1:1: 2 with garbage incineration fly ash in a certain ratio, placing the mixture into a stirrer for dry mixing at a stirring speed of 150 plus materials for 200 r/min for 30 minutes, and stirring until the mixture is uniformly mixed to obtain a mixture;
the second step is that: adding an adsorbent and a stabilizer in a ratio of 1:1 into the mixture obtained in the first step, stabilizing heavy metals in the incineration fly ash, mixing and stirring, adding a certain amount of water to enable the incineration fly ash to reach a saturated state, stirring again for 20min, uniformly stirring, and then maintaining for at least 3-4 hours;
the third step: then adding cellulose, an activating agent and a curing agent into the mixed solution obtained in the second step, then placing the mixed solution into a stirrer to be stirred for 10 minutes at the speed of 120r/min, uniformly mixing the mixed solution, and then carrying out heating treatment until the water is evaporated to dryness to obtain a mixed dry material;
the fourth step: and finally, feeding the obtained mixed dry material into a pyrolyzer, carrying out pyrolysis treatment until no pyrolysis gas is generated, obtaining a pyrolyzed product, and after cooling, carrying out landfill treatment on the pyrolyzed product.
3. The use method of the heavy metal stabilizer for treating the waste incineration fly ash according to claim 2, characterized in that: the phosphate is one or more of calcium magnesium phosphate, tripotassium phosphate, monopotassium phosphate and dipotassium phosphate.
4. The use method of the heavy metal stabilizer for treating the waste incineration fly ash according to claim 2, characterized in that: the sulfide is one or two of sodium hydrosulfide, sodium polysulfide and potassium sulfide.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811257503.1A CN111097129A (en) | 2018-10-26 | 2018-10-26 | Heavy metal stabilizer for treating waste incineration fly ash and use method thereof |
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| CN201811257503.1A CN111097129A (en) | 2018-10-26 | 2018-10-26 | Heavy metal stabilizer for treating waste incineration fly ash and use method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112624726A (en) * | 2020-12-03 | 2021-04-09 | 嘉兴沃特泰科环保科技股份有限公司 | Liquid mixed chelating agent for hazardous waste landfill standard and preparation method thereof |
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| CN112624726A (en) * | 2020-12-03 | 2021-04-09 | 嘉兴沃特泰科环保科技股份有限公司 | Liquid mixed chelating agent for hazardous waste landfill standard and preparation method thereof |
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