CN106955451A - Incineration of refuse flyash heavy metal chelant and preparation method thereof - Google Patents
Incineration of refuse flyash heavy metal chelant and preparation method thereof Download PDFInfo
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- CN106955451A CN106955451A CN201710109604.3A CN201710109604A CN106955451A CN 106955451 A CN106955451 A CN 106955451A CN 201710109604 A CN201710109604 A CN 201710109604A CN 106955451 A CN106955451 A CN 106955451A
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- heavy metal
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- refuse flyash
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- 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
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- 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
- A62D2101/20—Organic substances
- A62D2101/24—Organic substances containing heavy metals
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- General Health & Medical Sciences (AREA)
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Business, Economics & Management (AREA)
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- Processing Of Solid Wastes (AREA)
Abstract
The present invention discloses a kind of incineration of refuse flyash heavy metal chelant.The incineration of refuse flyash heavy metal chelant includes being 1 by weight:The compounding chelating agent and sodium hydroxide solution of 23 mixing, wherein the compounding chelating agent includes the composition counted as following weight percent：Organic sequestering agent：60 90%；Inorganic chelator：10 40%；The organic sequestering agent is dithiocarbamates, the one or more in zinc diethyl dithiocarbamate, PZ, NB sodium dibutyl dithiocarbamate or dibenzyl aminodithioformic acid sodium；One or two of the inorganic chelator in vulcanized sodium, sodium phosphate.The incineration of refuse flyash heavy metal chelant that the present invention is provided, can reduce Leaching of Heavy Metals concentration, it is ensured that flyash curing sample block meets leaching concentration limit value.The present invention also provides a kind of preparation method of incineration of refuse flyash heavy metal chelant.
Description
【Technical field】
The present invention relates to metal-chelator technical field, and in particular to a kind of incineration of refuse flyash heavy metal chelant and its
Preparation method.
【Background technology】
Domestic garbage incineration flyash complicated component, major pollutant is the heavy metal with high Leaching, to environment
There is serious harm.Heavy metal is constantly migrated, converted in the environment, contaminated soil and water environment can not by itself
Catharsis, which is realized, to be eliminated, and can not be decomposed by the microorganisms, and can be enriched with by biological chain, therefore flying dust is dealt with improperly and caused
Pollutant Heavy metals therein can produce serious harm into environment to health and natural environment.After testing, it is raw
Contain the heavy metal of higher leaching concentration in incineration of refuse flyash living, such as Pb, Cr, Cd, Cu, Hg and Zn are listed in dangerous useless
Gurry.
At present, the processing method of heavy metal component mainly has three kinds in flying dust, and one kind is to use cement solidification technology counterweight
Metal-cured processing, heavy metal is reacted by the cement of ion exchange, passivation, absorption, chemisorbed, sedimentation and aquation, finally
The compound that hydroxide or complex compound etc. are relatively stablized, but the party are formed on the hydrated silicate colloid C-H-S surfaces of cement
Method has the increase-volume amount of flying dust big, increases the shortcoming of the volume of landfill；Two be melting and solidification method, this method be it is generally acknowledged at present most
For safe and stable flying ash stabilizing/curing technology, flying ash is mainly mixed and made by this method with nature of glass powder
Grain shaping, melts a period of time under 1000~1400 DEG C of high temperature, but this method has the shortcomings that high energy consumption；Three be chemical agent
Stabilization method, chemical agent is by the chemical reaction with heavy metal by its ion transit into low-solubility, the macromolecule of low migration
Complex compound or inorganic mineral, its core are the selection of chelating agent, particularly chemical agent to a main pollution huge sum of money
Belong to the selectivity of ion, and generate the stability of complex compound, the particularly leachability to acid solution；And adopted in correlation technique
Chemical agent stabilization method is used, the chelating agent of use is generally DTC quasi-chelate compounds (dithiocar-bamate abbreviation DTC), belongs to non-
High-molecular compound, unit formula amount contains that complexing center is few, the complex compound generated with heavy metal can leaching concentration it is high.
Therefore, it is necessary to which providing a kind of new technique solves above-mentioned technical problem.
【The content of the invention】
The purpose of the present invention is to overcome above-mentioned technical problem there is provided a kind of Compositional type incineration of refuse flyash heavy metal chelating
Agent, can reduce Leaching of Heavy Metals concentration, it is ensured that flyash curing sample block meets leaching concentration limit value.
The technical scheme is that：
A kind of incineration of refuse flyash heavy metal chelant, including be 1 by weight:The compounding chelating agent and hydrogen of 2-3 mixing
Sodium hydroxide solution, wherein the compounding chelating agent includes the composition counted as following weight percent：
Organic sequestering agent：60-90%；
Inorganic chelator：10-40%；
The organic sequestering agent is dithiocarbamates, selected from zinc diethyl dithiocarbamate, dimethyl
Zinc dithiocarbamate, NB sodium dibutyl dithiocarbamate or one kind or many in dibenzyl aminodithioformic acid sodium
Kind；
One or two of the inorganic chelator in vulcanized sodium, sodium phosphate.
It is preferred that, the concentration of the sodium hydroxide solution is 0.5wt%-1wt%.
It is preferred that, the consumption of the incineration of refuse flyash heavy metal chelant is the 2-3% of flying dust total amount.
The present invention also provides a kind of preparation method of incineration of refuse flyash heavy metal chelant, comprises the following steps：
Step S1：The organic sequestering agent and the inorganic chelator are mixed to form compounding chelating agent in proportion；
Step S2：The compounding chelating agent is dissolved in sodium hydroxide solution, the waste incineration is uniformly mixing to obtain
Fly-ash heavy metal chelating agent；The weight ratio of wherein described compounding chelating agent and the sodium hydroxide solution is 1:2-3.
It is preferred that, the concentration of the sodium hydroxide solution is 0.5wt%-1wt%.
Compared with correlation technique, the incineration of refuse flyash heavy metal chelant that provides of the present invention, beneficial effect is：
First, the incineration of refuse flyash heavy metal chelant includes organic sequestering agent and inorganic chelator, forms Compositional type
Chelating agent, can produce the strong complex compound of stability with the poisonous ion of numerous heavy metals；Through the incineration of refuse flyash heavy metal chela
Flyash curing thing after mixture processing, can directly be filled or be used in combination as needed using cement hardener, after stabilization
Flyash curing thing is fabricated to non-bearing type building materials.
2nd, the incineration of refuse flyash heavy metal chelant is Compositional type chelating agent, and few with consumption, use cost is low
Advantage.
3rd, the complex compound acid-resisting ability of incineration of refuse flyash heavy metal chelant and the heavy metal generation is strong, pH value
When reaching 4, leaching concentration still meets national limitation.
【Embodiment】
Below will the invention will be further described by embodiment.
Embodiment one
A kind of incineration of refuse flyash heavy metal chelant, is mixed to form by compounding chelating agent and sodium hydroxide solution, wherein
The compounding chelating agent is 1 with the weight ratio of the sodium hydroxide solution:2；
The compounding chelating agent includes following composition by weight percentage：
Organic sequestering agent 60%；Inorganic chelator 40%；
The organic sequestering agent is dithiocarbamates, is zinc diethyl dithiocarbamate；It is described inorganic
Chelating agent is vulcanized sodium；The concentration of the sodium hydroxide solution is 0.5wt%.
The preparation method of above-mentioned incineration of refuse flyash heavy metal chelant, comprises the following steps：
Step S1：The organic sequestering agent and the inorganic chelator are mixed to form compounding chelating agent in proportion；
Step S2：The compounding chelating agent is dissolved in the sodium hydroxide solution, the rubbish is uniformly mixing to obtain
Incinerating flyash, heavy metal chelating agent；The weight ratio of wherein described compounding chelating agent and the sodium hydroxide solution is 1:2.
The application method of the incineration of refuse flyash heavy metal chelant：Directly with flying dust mixing and stirring, and
Usage amount is the 2% of flying dust total amount.
Embodiment two
A kind of incineration of refuse flyash heavy metal chelant, is mixed to form by compounding chelating agent and sodium hydroxide solution, wherein
The compounding chelating agent is 1 with the weight ratio of the sodium hydroxide solution:3；
The compounding chelating agent includes following composition by weight percentage：
Organic sequestering agent 80%；Inorganic chelator 20%；
The organic sequestering agent is dithiocarbamates, is zinc diethyl dithiocarbamate and dimethyl two
Zinc thiocarbamate；The inorganic chelator is sodium phosphate；The concentration of the sodium hydroxide solution is 0.7wt%.
The preparation method of above-mentioned incineration of refuse flyash heavy metal chelant, comprises the following steps：
Step S1：The organic sequestering agent and the inorganic chelator are mixed to form compounding chelating agent in proportion；
Step S2：The compounding chelating agent is dissolved in the sodium hydroxide solution, the rubbish is uniformly mixing to obtain
Incinerating flyash, heavy metal chelating agent；The weight ratio of wherein described compounding chelating agent and the sodium hydroxide solution is 1:3.
The application method of the incineration of refuse flyash heavy metal chelant：Directly with flying dust mixing and stirring, and
Usage amount is the 2.5% of flying dust total amount.
Embodiment three
A kind of incineration of refuse flyash heavy metal chelant, is mixed to form by compounding chelating agent and sodium hydroxide solution, wherein
The compounding chelating agent is 1 with the weight ratio of the sodium hydroxide solution:2；
The compounding chelating agent includes following composition by weight percentage：
Organic sequestering agent 90%；Inorganic chelator 10%；
The organic sequestering agent is dithiocarbamates, is zinc diethyl dithiocarbamate, dimethyl two
The mixture of zinc thiocarbamate and dibenzyl aminodithioformic acid sodium；The inorganic chelator is vulcanized sodium and sodium phosphate
Mixture；The concentration of the sodium hydroxide solution is 1wt%.
The preparation method of above-mentioned incineration of refuse flyash heavy metal chelant, comprises the following steps：
Step S1：The organic sequestering agent and the inorganic chelator are mixed to form compounding chelating agent in proportion；
Step S2：The compounding chelating agent is dissolved in the sodium hydroxide solution, the rubbish is uniformly mixing to obtain
Incinerating flyash, heavy metal chelating agent；The weight ratio of wherein described compounding chelating agent and the sodium hydroxide solution is 1:2.
The application method of the incineration of refuse flyash heavy metal chelant：Directly with flying dust mixing and stirring, and
Usage amount is the 3% of flying dust total amount.
Example IV
A kind of incineration of refuse flyash heavy metal chelant, is mixed to form by compounding chelating agent and sodium hydroxide solution, wherein
The compounding chelating agent is 1 with the weight ratio of the sodium hydroxide solution:2.5；
The compounding chelating agent includes following composition by weight percentage：
Organic sequestering agent 70%；Inorganic chelator 30%；
The organic sequestering agent is dithiocarbamates, is NB sodium dibutyl dithiocarbamate and dibenzyl two
The mixture of thiocarbamic acid sodium；The inorganic chelator is the mixture of vulcanized sodium and sodium phosphate；The NaOH is molten
The concentration of liquid is 1wt%.
The preparation method of above-mentioned incineration of refuse flyash heavy metal chelant, comprises the following steps：
Step S1：The organic sequestering agent and the inorganic chelator are mixed to form compounding chelating agent in proportion；
Step S2：The compounding chelating agent is dissolved in the sodium hydroxide solution, the rubbish is uniformly mixing to obtain
Incinerating flyash, heavy metal chelating agent；The weight ratio of wherein described compounding chelating agent and the sodium hydroxide solution is 1:2.5.
The application method of the incineration of refuse flyash heavy metal chelant：Directly with flying dust mixing and stirring, and
Usage amount is the 2.5% of flying dust total amount.
The incineration of refuse flyash heavy metal chelant of embodiment two is used to handle incineration of refuse flyash, and carries out heavy metal
Ion leaches detection, and heavy metal ion leaching method is used《Consumer waste filling and embedding Environmental capacity standard》(GB 16889-2008)
Specified in HJ/T 300-2007 leach program (solid waste Leaching leaching method, acetate buffer solution method), testing result
It is as follows：
The content of heavy metal and leaching concentration detection data in flying dust
Wherein, ND represents not detect.The chelating agent provided using the present invention is can be seen that by above-mentioned detection data to handle
Content of beary metal is less than standard of landfill value in flying dust afterwards, available for directly landfill.
Compared with correlation technique, the incineration of refuse flyash heavy metal chelant that provides of the present invention, beneficial effect is：
First, the incineration of refuse flyash heavy metal chelant includes organic sequestering agent and inorganic chelator, forms Compositional type
Chelating agent, can produce the strong complex compound of stability with the poisonous ion of numerous heavy metals；Through the incineration of refuse flyash heavy metal chela
Flyash curing thing after mixture processing, can directly be filled or be used in combination as needed using cement hardener, after stabilization
Flyash curing thing is fabricated to non-bearing type building materials.
2nd, the incineration of refuse flyash heavy metal chelant is Compositional type chelating agent, and few with consumption, use cost is low
Advantage.
3rd, the complex compound acid-resisting ability of incineration of refuse flyash heavy metal chelant and the heavy metal generation is strong, pH value
When reaching 4, leaching concentration still meets national limitation.
Above-described is only embodiments of the present invention, it should be noted here that for one of ordinary skill in the art
For, without departing from the concept of the premise of the invention, improvement can also be made, but these belong to the protection model of the present invention
Enclose.
Claims (5)
1. a kind of incineration of refuse flyash heavy metal chelant, it is characterised in that including being 1 by weight:The compounding chela of 2-3 mixing
Mixture and sodium hydroxide solution, wherein the compounding chelating agent includes the composition counted as following weight percent：
Organic sequestering agent：60-90%；
Inorganic chelator：10-40%；
The organic sequestering agent is dithiocarbamates, selected from zinc diethyl dithiocarbamate, DMDS
For the one or more in carbaminate, NB sodium dibutyl dithiocarbamate or dibenzyl aminodithioformic acid sodium；
One or two of the inorganic chelator in vulcanized sodium, sodium phosphate.
2. incineration of refuse flyash heavy metal chelant according to claim 1, it is characterised in that the sodium hydroxide solution
Concentration be 0.5wt%-1wt%.
3. incineration of refuse flyash heavy metal chelant according to claim 1 or 2, it is characterised in that the waste incineration
The consumption of fly-ash heavy metal chelating agent is the 2-3% of flying dust total amount.
4. a kind of preparation method of the incineration of refuse flyash heavy metal chelant any one of claims 1 to 3, its feature
It is to comprise the following steps：
Step S1：The organic sequestering agent and the inorganic chelator are mixed to form compounding chelating agent in proportion；
Step S2：The compounding chelating agent is dissolved in sodium hydroxide solution, the incineration of refuse flyash is uniformly mixing to obtain
Heavy metal chelant；The weight ratio of wherein described compounding chelating agent and the sodium hydroxide solution is 1:2-3.
5. the preparation method of incineration of refuse flyash heavy metal chelant according to claim 4, it is characterised in that the hydrogen
The concentration of sodium hydroxide solution is 0.5wt%-1wt%.
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| CN108704238A (en) * | 2018-07-26 | 2018-10-26 | 安徽安江环保科技有限公司 | A kind of flying dust chelating modifying agent and preparation method thereof |
| CN108744383A (en) * | 2018-08-06 | 2018-11-06 | 成都市兴蓉再生能源有限公司 | A kind of compound incineration of refuse flyash chelating agent and preparation method thereof |
| CN109091792A (en) * | 2018-10-10 | 2018-12-28 | 湖南凯涛环保科技有限公司 | A kind of preparation method of flying dust chelating agent and heavy metal chelating agent |
| CN109126011A (en) * | 2018-06-28 | 2019-01-04 | 内蒙古益兴环保工程有限公司 | Handle the medicament of flying ash |
| CN109316705A (en) * | 2018-12-04 | 2019-02-12 | 合肥全晟环保科技有限公司 | Compound waste incineration chelating agent and preparation method thereof |
| CN109316706A (en) * | 2018-12-04 | 2019-02-12 | 合肥全晟环保科技有限公司 | The chelating agent and preparation method thereof of heavy metal in efficient process incineration of refuse flyash |
| CN109316704A (en) * | 2018-12-04 | 2019-02-12 | 合肥全晟环保科技有限公司 | For handling the chelating agent and preparation method thereof of heavy metal in incineration of refuse flyash |
| CN109364422A (en) * | 2018-12-04 | 2019-02-22 | 合肥全晟环保科技有限公司 | A kind of processing method of efficient incineration of refuse flyash |
| CN109622560A (en) * | 2018-12-04 | 2019-04-16 | 合肥全晟环保科技有限公司 | The processing method of incineration of refuse flyash |
| JP2019089050A (en) * | 2017-11-17 | 2019-06-13 | 栗田工業株式会社 | Method for treating heavy metal containing ash containing lead component and mercury component, and elution inhibitor of mercury component contained in heavy metal containing ash |
| CN111084958A (en) * | 2019-12-30 | 2020-05-01 | 江苏弘成环保科技有限公司 | Chelating agent for solidifying high-content heavy metal barium in chelated fly ash |
| CN111265810A (en) * | 2019-09-20 | 2020-06-12 | 连云港新江环保材料有限公司 | Efficient fly ash chelating agent and preparation method thereof |
| CN111603717A (en) * | 2020-06-24 | 2020-09-01 | 北京海威百信科技有限公司 | Efficient chelating agent for curing garbage combustion fly ash and preparation and use method thereof |
| CN111760232A (en) * | 2020-07-28 | 2020-10-13 | 西藏大学 | Fly ash heavy metal chelating agent precursor and preparation method thereof |
| CN111905320A (en) * | 2020-07-22 | 2020-11-10 | 石家庄中油优艺环保科技有限公司 | Heavy metal chelating agent for hazardous waste incineration fly ash and preparation method thereof |
| CN111905321A (en) * | 2020-08-19 | 2020-11-10 | 厦门晖鸿环境资源科技有限公司 | Fly ash composite chelating agent and preparation method and application thereof |
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| CN108704238A (en) * | 2018-07-26 | 2018-10-26 | 安徽安江环保科技有限公司 | A kind of flying dust chelating modifying agent and preparation method thereof |
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Application publication date: 20170718 |