CN110090384A - A kind of compound incineration of refuse flyash heavy metal chelant and preparation method thereof - Google Patents
A kind of compound incineration of refuse flyash heavy metal chelant and preparation method thereof Download PDFInfo
- Publication number
- CN110090384A CN110090384A CN201910429480.6A CN201910429480A CN110090384A CN 110090384 A CN110090384 A CN 110090384A CN 201910429480 A CN201910429480 A CN 201910429480A CN 110090384 A CN110090384 A CN 110090384A
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- parts
- sodium
- heavy metal
- refuse flyash
- incineration
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Classifications
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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
-
- 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
- A62D2101/40—Inorganic substances
- A62D2101/43—Inorganic substances containing heavy metals, in the bonded or free state
Abstract
The invention discloses a kind of compound incineration of refuse flyash heavy metal chelants and preparation method thereof, by weight, including following component: 15-20 parts of organic sequestering agent, 5-10 parts of inorganic chelator, 2-10 parts of inhibitor, 2-5 parts of dispersing agent, 50-80 parts of water.The organic sequestering agent is two Thioxanthate sodium of butyl, sodium dimethyl dithiocarbamate mixture.The inorganic chelator is hexa metaphosphoric acid trisodium, and the inhibitor is sodium lignin sulfonate, and the dispersing agent is sodium metasilicate.The present invention is a kind of polygamy side's Compound Heavy Metals chelating agent, by organic, inorganic multi-component synergistic effect has the heavy metal in rubbish flying ash flying dust stronger sequestering, it efficiently realizes the stabilization processes to incineration of refuse flyash, guarantees that leachate pollutant concentration is up to standard.The present invention also provides a kind of compound incineration of refuse flyash heavy metal chelant preparation methods.
Description
Technical field
The present invention relates to environment protection treating field more particularly to a kind of compound incineration of refuse flyash heavy metal chelant and its
Preparation method.
Background technique
With the rapid growth of China's rapid economic development and urban population, domestic waste has become a pollution ring
Border, the social concern for influencing life.Waste incineration generates a large amount of flying dusts while realizing to Domestic Waste Minimization processing,
Flying dust is enriched the stronger heavy metal of toxicity and dioxin pollution object." consumer waste filling and embedding contamination control standard " GB
Clear stipulaties in 16889-2008: domestic garbage incineration flyash after processing, according to " solid waste Leaching leaching method vinegar
Acid buffering solwution method " HJ/T300-2007 preparation leachate in endanger constituent concentration be lower than national regulation limit value, can send
Enter household refuse landfill sites and carries out Zoning landfill.
There are two types of common flying ash processing techniques: cement solidification and chemical agent stabilize.Chemical agent stabilizes
It is that the heavy metal in flying dust is become into inorganic mineral not soluble in water or high-molecule chelated by chemically reacting with chemical agent
Object makes them become the substance of indissoluble, difficult migration.Use type, formula, the adding proportion of flying dust chelating agent directly affect winged
Grey stabilization effect.Existing heavy metal chelant, such as it is commercially available generally use with dithiocarbonic acid sodium, EDTA chelating agent is
The chelating agent of main body is primarily present following problems: sequestering power is not strong, stability is poor, not to the adaptability of different type flying dust
By force, it be easy to cause secondary pollution.These chelating agents are to metallic element poor selectivity simultaneously, in flying dust other than heavy metal element,
There is also more alkaline-earth metal, cause amount of chelant big, and operating cost is high.In addition it is filled out after domestic garbage incineration flyash processing
Burying moisture content cannot be excessively high, bad dispersibility of the existing chelating agent in flying dust slurry, and chelate effect is bad.
Summary of the invention
In view of the above-mentioned problems, the purpose of the present invention is to provide a kind of dosage is small, good dispersion, heavy metal chelating efficiency
Height, the low incineration of refuse flyash heavy metal chelant and preparation method thereof of use cost.
The technical solution adopted by the invention is as follows: a kind of compound incineration of refuse flyash heavy metal chelant, by weight
Meter, including following component: 10-20 parts of organic sequestering agent, 5-10 parts of inorganic chelator, 2-10 parts of inhibitor, 2-5 parts of dispersing agent,
50-80 parts of water.
The organic sequestering agent is two Thioxanthate sodium of butyl, sodium dimethyl dithiocarbamate mixture.Institute
The inorganic chelator stated is hexa metaphosphoric acid trisodium, and the inhibitor is sodium lignin sulfonate, and the dispersing agent is sodium metasilicate.
It is preferred: above-mentioned compound incineration of refuse flyash heavy metal chelant, by weight, two Thioxanthate of butyl
15 parts of sodium, 5 parts of sodium dimethyl dithiocarbamate, 5 parts of hexa metaphosphoric acid trisodium, 2.5 parts of sodium lignin sulfonate, sodium metasilicate 0.5
Part, 72 parts of water.
It is preferred: above-mentioned compound incineration of refuse flyash heavy metal chelant, by weight, two Thioxanthate of butyl
12 parts of sodium, 8 parts of sodium dimethyl dithiocarbamate, 5 parts of hexa metaphosphoric acid trisodium, 2.5 parts of sodium lignin sulfonate, sodium metasilicate 0.5
Part, 72 parts of water.
Further, the water is industrial water.
The invention also includes a kind of preparation methods of compound incineration of refuse flyash heavy metal chelant, including following step
It is rapid:
(1) in agitator tank, industry water is injected, by two Thioxanthate sodium of butyl, sodium dimethyl dithiocarbamate
Stirring sequentially adds in agitator tank；On one side plus raw material while stir to being completely dissolved, obtain mixed liquor.
(2) hexa metaphosphoric acid trisodium, sodium lignin sulfonate are added in mixing liquid, sodium metasilicate stirs 1 at a temperature of room temperature
Hour at mixing liquid, stands 18 hours.
In conclusion the technical problems to be solved by the present invention are: it is commercially available generally using chelating agent there are aiming at the problem that,
A kind of compound incineration of refuse flyash chelating agent and preparation method thereof is provided, two sulphur of butyl that can be strong to heavy metal collecting performance is selected
It is compound for sodium xanthogenate and sodium dimethyl dithiocarbamate mixture and inorganic chelator hexa metaphosphoric acid trisodium, improve chelating
Agent inhibits alkaline-earth metal by additive sodium lignin sulfonate, improves chela to the chelating ability and stability of heavy metal element
Mixture is to the selectivity of heavy metal ion, to reduce amount of chelant.Sodium metasilicate is added as dispersing agent, sodium metasilicate is in flying dust
Slurry forms micelle or dissociation, is adsorbed in ash surface and forms hydrophilic film, improves the dispersion performance of slurry, be conducive to chelating agent and
The contact of heavy metal ion.
By adopting the above-described technical solution, the beneficial effects of the present invention are:
The present invention is a kind of polygamy side's Compound Heavy Metals chelating agent, by organic, inorganic multi-component synergistic effect, to winged
Heavy metal in ash has stronger sequestering, can efficiently realize to the steady of incineration of refuse flyash under the conditions of wider pH value
Determining processing guarantees that leachate pollutant concentration is up to standard.Moreover, it relates to raw material it is soluble easily in water, preparation method is simple,
Dosage is small, and flying dust processing cost is cheap, easy to spread.
Specific embodiment
All features disclosed in this specification or disclosed all methods or in the process the step of, in addition to mutually exclusive
Feature and/or step other than, can combine in any way.
Any feature disclosed in this specification unless specifically stated can be by other equivalent or with similar purpose
Alternative features are replaced.That is, unless specifically stated, each feature is an example in a series of equivalent or similar characteristics
?.
Embodiment 1
(1) in agitator tank, industry 72kg water is injected, by two Thioxanthate sodium 15kg of butyl, dimethyl disulfide is for ammonia
Base sodium formate 5kg, sequentially adds in agitator tank；It is stirred while raw material is added to being completely dissolved, obtains mixed liquor.
(2) hexa metaphosphoric acid trisodium 5kg, sodium lignin sulfonate 2.5kg, sodium metasilicate 2.5kg, normal are added in mixing liquid
1 hour is stirred at temperature into mixing liquid, is stood 20 hours, is named as 1# heavy metal chelant.
Embodiment 2
(1) in agitator tank, industry 72kg water is injected, by two Thioxanthate sodium 12kg of butyl, dimethyl disulfide is for ammonia
Base sodium formate 8kg, sequentially adds in agitator tank；On one side plus raw material while stir to being completely dissolved, obtain mixed liquor.
(2) hexa metaphosphoric acid trisodium 5kg, sodium lignin sulfonate 2.5kg, sodium metasilicate 2.5kg, normal are added in mixing liquid
1 hour is stirred at temperature into mixing liquid, is stood 20 hours, is named as metal category chelating agent in 2#.
Effect example 1
Using heavy metal chelant processing Jiangxi height pacifies certain burning power plant in 1# and Guizhou burning power plant is burnt
Burn flying dust.In a mixer, by 1# heavy metal chelant: flying dust: water is mixed in the ratio of 2:100:25, is reacted 2 hours
Afterwards, heavy metal ion is carried out after flying dust block being conserved three days and leaches detection, and leaching method is using " household refuse landfill sites pollution
Control standard " HJ/T300-2007 (acetate buffer solution method) specified in (GB16889-2008).
" household refuse landfill sites contamination control mark is compared using metal concentration in ICP-MS measurement flying dust leachate
It is quasi- " in heavy metal limit value, obtain that the results are shown in Table 1:
Effect example 2
Using heavy metal chelant processing Jiangxi height pacifies certain burning power plant in 2# and Guizhou burning power plant is burnt
Burn flying dust.In a mixer, by 2# heavy metal chelant: flying dust: water is mixed in the ratio of 2:100:25, is reacted 2 hours
Afterwards, heavy metal ion is carried out after flyash curing block being conserved three days and leaches detection, and leaching method is using " household refuse landfill sites are dirty
Contaminate control standard " HJ/T300-2007 (acetate buffer solution method) specified in (GB16889-2008).
Using metal concentration in ICP-MS measurement flyash curing block leachate, compare " household refuse landfill sites contamination control
Standard " in heavy metal limit value, obtain that the results are shown in Table 2:
Listed test result shows an association complex of the invention in table 1, table 2, the flyash curing after stablizing
Block, Leaching of Heavy Metals concentration meet the technical requirements of national standard restriction, have reached National Hazard waste judging standard and life rubbish
The requirement of rubbish landfill yard admissions criteria, can be used for directly filling.In table: -- expression is not detected.
The above, the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although referring to before
Stating embodiment, invention is explained in detail, those skilled in the art should understand that: it still can be to preceding
Technical solution documented by each embodiment is stated to modify or equivalent replacement of some of the technical features；And these
It modifies or replaces, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (9)
1. a kind of compound incineration of refuse flyash heavy metal chelant, which is characterized in that by weight: including following component:
10-20 parts of organic sequestering agent, 5-10 parts of inorganic chelator, 2-10 parts of inhibitor, 2-5 parts of dispersing agent, 50-80 parts of water.
2. compound incineration of refuse flyash heavy metal chelant according to claim 1, it is characterised in that: described is organic
Chelating agent is two Thioxanthate sodium of butyl, sodium dimethyl dithiocarbamate mixture.
3. compound incineration of refuse flyash heavy metal chelant according to claim 2, it is characterised in that: inorganic chelator
For hexa metaphosphoric acid trisodium.
4. compound incineration of refuse flyash heavy metal chelant according to claim 3, it is characterised in that: inhibitor is wood
Quality sodium sulfonate.
5. compound incineration of refuse flyash heavy metal chelant according to claim 4, it is characterised in that: dispersing agent is silicon
Sour sodium.
6. compound incineration of refuse flyash heavy metal chelant according to claim 5, it is characterised in that: water is industrial
Water.
7. compound incineration of refuse flyash heavy metal chelant according to claim 6, it is characterised in that: by weight
Meter, 15 parts of two Thioxanthate sodium of butyl, 5 parts of sodium dimethyl dithiocarbamate, 5 parts of hexa metaphosphoric acid trisodium, sulfomethylated lignin
2.5 parts of sour sodium, 0.5 part of sodium metasilicate, 72 parts of water.
8. compound incineration of refuse flyash heavy metal chelant according to claim 6, it is characterised in that: by weight
Meter, 12 parts of two Thioxanthate sodium of butyl, 8 parts of sodium dimethyl dithiocarbamate, 5 parts of hexa metaphosphoric acid trisodium, sulfomethylated lignin
2.5 parts of sour sodium, 0.5 part of sodium metasilicate, 72 parts of water.
9. a kind of preparation method of compound incineration of refuse flyash heavy metal chelant according to claim 7 or 8, special
Sign is, comprising the following steps:
(1) industry water is injected in agitator tank, by two Thioxanthate sodium of butyl, sodium dimethyl dithiocarbamate stirring according to
In secondary addition agitator tank；It is stirred while raw material is added to being completely dissolved, obtains mixed liquor；
(2) hexa metaphosphoric acid trisodium, sodium lignin sulfonate are added in mixing liquid, sodium metasilicate stirs 2 hours at a temperature of room temperature
At mixing liquid, 18 hours are stood.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110270046A (en) * | 2019-08-07 | 2019-09-24 | 新中天环保股份有限公司 | A kind of New-type refuse vehicle fly-ash heavy metal stabilizer and its application method |
| 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 |
| CN111849491A (en) * | 2020-07-30 | 2020-10-30 | 乐昌市住宅建筑工程有限公司 | High-standard farmland construction method |
| CN112316352A (en) * | 2020-09-08 | 2021-02-05 | 馆陶县晴美环保科技有限公司 | Composition for solidifying waste incineration fly ash and preparation method and application thereof |
| CN112402889A (en) * | 2020-06-22 | 2021-02-26 | 北京中科润宇环保科技股份有限公司 | Chelating agent |
| CN112972975A (en) * | 2019-12-13 | 2021-06-18 | 浙江沣蓝环保技术有限公司 | Heavy metal chelating agent and preparation method thereof |
| CN113024051A (en) * | 2019-12-24 | 2021-06-25 | 湖南军信环保股份有限公司 | Targeting chelating agent and method for treating refuse leachate membrane filtration concentrated solution salt slurry |
| CN114100053A (en) * | 2021-11-19 | 2022-03-01 | 深圳市航天新材科技有限公司 | Long-acting treatment material for household garbage incineration fly ash and preparation method thereof |
| CN114307030A (en) * | 2021-03-10 | 2022-04-12 | 江苏海默环保科技有限公司 | Fly ash heavy metal curing agent, preparation method thereof and fly ash treatment method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110270046A (en) * | 2019-08-07 | 2019-09-24 | 新中天环保股份有限公司 | A kind of New-type refuse vehicle fly-ash heavy metal stabilizer and its application method |
| 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 |
| CN112972975A (en) * | 2019-12-13 | 2021-06-18 | 浙江沣蓝环保技术有限公司 | Heavy metal chelating agent and preparation method thereof |
| CN113024051A (en) * | 2019-12-24 | 2021-06-25 | 湖南军信环保股份有限公司 | Targeting chelating agent and method for treating refuse leachate membrane filtration concentrated solution salt slurry |
| CN112402889A (en) * | 2020-06-22 | 2021-02-26 | 北京中科润宇环保科技股份有限公司 | Chelating agent |
| CN111849491A (en) * | 2020-07-30 | 2020-10-30 | 乐昌市住宅建筑工程有限公司 | High-standard farmland construction method |
| CN112316352A (en) * | 2020-09-08 | 2021-02-05 | 馆陶县晴美环保科技有限公司 | Composition for solidifying waste incineration fly ash and preparation method and application thereof |
| CN114307030A (en) * | 2021-03-10 | 2022-04-12 | 江苏海默环保科技有限公司 | Fly ash heavy metal curing agent, preparation method thereof and fly ash treatment method |
| CN114100053A (en) * | 2021-11-19 | 2022-03-01 | 深圳市航天新材科技有限公司 | Long-acting treatment material for household garbage incineration fly ash and preparation method thereof |
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