CN1810894A - Use of fly ash from burning city domestic garbage - Google Patents
Use of fly ash from burning city domestic garbage Download PDFInfo
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- CN1810894A CN1810894A CN 200610023336 CN200610023336A CN1810894A CN 1810894 A CN1810894 A CN 1810894A CN 200610023336 CN200610023336 CN 200610023336 CN 200610023336 A CN200610023336 A CN 200610023336A CN 1810894 A CN1810894 A CN 1810894A
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- flying dust
- fly ash
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Abstract
The present invention relates to new use of fly ash from burning city domestic garbage, and the fly ash is used as stuffing for polymer material after being activated with surfactant in a dry process. Fly ash is first crushed to 500-1200 mesh and stoved, and then mixed with surfactant in the ratio of 100 to 1-5 inside a ball mill through grinding for 5-30 min, with the modified fly ash being preserved hermetically. The modified fly ash in 10-15 wt% is added into polypropylene base material to produce product reaching relevant standard. The present invention has wide material source, low cost, no secondary pollution caused by the activation treatment and excellent market foreground.
Description
Technical field
The present invention relates to the new purposes of fly ash from burning city domestic garbage, specifically is the filler that fly ash from burning city domestic garbage is used as macromolecular material, belongs to the garbage as resource technical field.
Background technology
The Chinese national economy fast development, living standards of the people significantly improve, the sharp increase of municipal solid wastes quantity.Statistic data shows that the national domestic refuse amount of clearing in 2003 increases by 8.8% up to 14,857 ten thousand tons than the last year, serious threat and affect the environment that the mankind depend on for existence.
Waste incineration is under aerobic conditions rubbish to be carried out the chemically treated method of elevated temperature heat, have occupation of land less, the volume reduction rate height, reclaim numerous advantages such as heat energy and more and more paid attention to.Incineration of refuse flyash (hereinafter to be referred as " flying dust ") is the product in the waste incineration process, because of enrichment a large amount of harmful heavy metals and hypertoxic components such as micro-dioxin and furans, domestic and international existing environmental legislation classifies as Hazardous wastes with it, and emphasizing must safe disposal.
According to the disposition of solid waste planning of Shanghai City government permission, by 2010, Shanghai will form the development pattern of inner city domestic refuse based on burning disposal.At present, the 600000 tons of waste incinerations in Shanghai will produce nearly 20,000 tons of flying dusts every year, and Shanghai flying ash generation will reach ten thousand tons/year of 7-8 in 2010.Adopt the security landfill method to dispose flying dust, not only the landfill disposal costs is very high, and the method for security landfill has simultaneously taken a large amount of land resources, and obviously, this contradicts with the existing land resources in Shanghai, financial resource.
The flying dust recycling mainly concentrates on the following aspects both at home and abroad: (1) in Japan, flying dust and end slag mix does the eco-cement use; (2) U.S. and other American-European developed countries make cement concrete and the alternative aggregate of bituminous with mixed ash; (3) fusing fly ash is made the raw material of devitrified glass.But above these utilize method to fail to solve actual engineering problem: it is troubling all the time that the heavy metal ion after (1) resource utilization in the flying dust leaches problem; (2) flying dust resource utilization cost is too high, is not suitable for producing in batches; (3) added value of flying dust resource product is low etc.For this reason, seek suitable flying dust and utilize method extremely urgent!
Summary of the invention
The objective of the invention is to disclose a kind of new purposes of fly ash from burning city domestic garbage.
In order to reach purpose of the present invention, through to the discovering of city garbage burning flying ash, the original particle size of fly ash of city garbage burning is tiny, contain abundant element and component (metal, salt), and main component is CaO and SiO
2Consider that from the angle of ore dressing flying dust and nonmetal inorganic mineral powder have certain similar, have produced the idea of utilizing the alternative nonmetal inorganic mineral powder body and function of flying dust to make filling material of polymers thus naturally.So further investigate and discover: China's plastics will be up to ten thousand tons of 300-350 (seeing " plastics industry " prediction) to the demand of nonmetal inorganic mineral powder in 2010, therefore flying dust is developed into filler product through surface modification is applied to macromolecular material, not only can reduce the production cost of macromolecular material, also having realized simultaneously the high value added utilization of flying dust, is the new outlet of resource utilization of flying dust.And the heavy metal problem in the flying dust can be by selecting for use chelate surfactant to stablize and utilizing the solidification matrix of product of rubber and plastic to solve.In a word, city garbage burning flying ash as the filler of macromolecular material, adds other auxiliary agent extruder grains by the dry method modification activation treatment of tensio-active agent, or injection moulding.
Concrete technical scheme of the present invention and measure are as follows:
Earlier incineration of refuse flyash is carried out superfine grinding to 500 orders-1200 order, oven dry, measure the flying dust powder of oven dry then: the weight percent of tensio-active agent=100: 1.0-5.0%, again the flying dust powder is placed the mill jar of high speed kneader/homogenizer (as: ball mill etc.) to mix, and inject tensio-active agent with the mill pearl; Under high rotating speed, stirred 5-30 minute at last, behind the separation mill pearl, the sealing of modification flying dust powder is preserved.
Because the macromolecular material kind is too many, the present invention selects different amount flying dust filled polypropylene plastics and investigates its characteristic, every index of filling 10% modification flying dust synthetic polypropylene articles meets national standard, and the requirement that the polypropylene articles that 25% modification flying dust is filled only reaches the injection moulding class and extrudes flat membrane-based article.Concrete detection data such as following table.
| Dissimilar polypropylene articles | Tensile strength MPa | Elongation after fracture % | Flexural strength (MPa) | Shock strength (J/m) | Melting index g/10min |
| 10% onodoidecyl phosphonic acid modification flying dust filled polypropylene goods, 25% onodoidecyl phosphonic acid modification flying dust filled polypropylene goods injection moulding class GB/T 12670-1990 extrudes flat filament class GB/T 12670-1990 and extrudes flat film class GB/T 12670-1990 rope wires class GB/T 12670-1990 inflation film class GB/T 12670-1990 coating class GB/T 12670-1990 spinning class GB/T 12670-1990 | 33.5 30.7 ≥20.0 ≥27.5 ≥29.0 ≥27.0 ≥30.0 ≥29.0 ≥28.0 | 858.5 104.0 - - - - - - - | 3.88 3.13 - - - - - - - | 24.51 19.35 ≥15 - - - - - - | 1.67 0.90 0.82-15 1.4-8.4 0.9-2.1 1.5-3.5 5.7-13 16-36 1.4-49 |
Chelate surfactant of the present invention has multiple, and all have chelating function and lipophilic group and have the anion surfactant of the above long carbon-chain structure of 8 carbon atoms all can use, and processing step can carry out by the same manner.Such chelate surfactant can be: lemon acid type (as: glyceryl stearate citrate); EDTA type (as: N-lauroyl ethylenediamine triacetic acid C
20H
36O
7N
2Or its esters); Organophosphorus acid type (onodoidecyl phosphonic acid fat and its esters) and amino acid pattern (as: sodium lauroyl sareosine/potassium) etc.
The present invention has following advantage and effect:
1. because flying dust adopts tensio-active agent dry method modification activation treatment, therefore in the flying dust surface coverage layer of surface promoting agent film, make in the EPA TCLP test leaching process, the heavy metal of stripping can be caught by the chelate surfactant of flying dust surface adsorption in the flying dust, reduce leaching concentration, improved the safety of plastics.Compare with the wet-process modified method of flying dust, flying dust activation treatment of the present invention does not produce disposes of sewage, and does not have the secondary pollution problem.
2. because chelate surfactant has been selected in flying dust modification of the present invention for use, show as the intensive hydrophobicity after making the flying dust activation, its activation rate has increased avidity between flying dust and the polymer base-material up to more than 90%, has improved flying dust and polymer base-material interface compatibility.Meet requirement fully, and be filled in the high molecular polymer, the heavy metal in the flying dust is had the strong usefulness that turns into as the macromolecule organic material filler.
3. modification flying dust of the present invention is fit to do the filler of miscellaneous macromolecular material, and just can become the polymer injection-molded item as long as regulate consumption, or extrudes silk or membrane product, or blown film goods, or the coating based article, or the spinning based article, their every index all meets national standard.
4. the present invention compares with other non-metallic minerals fillers, and the initial size of flying dust is little, and 95wt% is below 200 μ m, and the flying dust source is wide, cost is low; The flying dust activation rate is higher than 90% after the modification.
5. the present invention compares with other flying dust method of resource: the technology that the flying dust modification is handled is simple, cost is low; The surfactivity agent dose of selecting for use is little, effect is good; Gained rubber and plastic value-added content of product height.After the test of EPA TCLP method, the leaching concentration of Pb, Zn and Cd is all far below the EPA standard in the goods.
Embodiment
Embodiment 1
Earlier incineration of refuse flyash is carried out superfine grinding to 500 orders, the flying dust powders of getting 100 gram oven dry are inserted in the mill jar of planetary ball mill and are mixed with the mass ratio of mill pearl by 1: 3, inject 2.5 milliliters onodoidecyl phosphonic acid fat; Under 450 rev/mins rotating speed, stirred 10 minutes then, after screening separates the mill pearl, the sealing of modification flying dust powder is preserved.
Modification flying dust powder mixes with the polypropylene base-material by 20% mass ratio, adds other auxiliary agent extruder grains such as 10% softening agent, injection moulding as required at last.After testing, the mechanical property of the polypropylene material material products of flying dust filling meets the every technical indicator in the national standard; Use EPA TCLP leaching toxicity test the flying dust polypropylene articles is detected, the result shows that the leaching concentration of heavy metal is lower than standard limited value.
Embodiment 2
Earlier incineration of refuse flyash is carried out superfine grinding to 1200 orders, the flying dust powders of getting 100 gram oven dry are inserted in the mill jar of planetary ball mill and are mixed with the mass ratio of mill pearl by 1: 3, inject 3.0 milliliters sodium lauroyl sareosine; Under 450 rev/mins rotating speed, stirred 15 minutes then, after screening separates the mill pearl, the sealing of modification flying dust powder is preserved.
Modification flying dust powder mixes with the polypropylene base-material by 15% mass ratio, adds other auxiliary agent extruder grains such as 15% softening agent, injection moulding as required at last.Perhaps modification flying dust powder mixes with the polypropylene base-material by 15% mass ratio, adds other auxiliary agent extruder grains such as 10% softening agent, injection moulding as required at last.
The polypropylene articles that above-mentioned flying dust is filled is finished in Shanghai plastic molding and processing plant, and synthetic 10wt% modification flying dust filled polypropylene standard testing sample shows light coffee color, and when modification flying dust filler was increased to 25wt%, synthetic polypropylene sample was a dark brown.Adopt TCLP No. 2 leaching liquids, be that the pH value is that 2.88 the 0.1mol/L HAc aqueous solution is tested, it is low that the heavy metal of flying dust polypropylene articles leaches concentration, for loading level is 25wt% onodoidecyl phosphonic acid modification flying dust filled polypropylene goods: the leaching concentration of Pb only is that 0.18mg/L, Cd only are 0.01mg/L for 0.24mg/L, Zn only, far below U.S. EPA standard limited value: Pb=5.0mg/L, Zn=50.0mg/L and Cd=1.0mg/L.
Claims (5)
1. the purposes of fly ash from burning city domestic garbage is characterized in that: fly ash from burning city domestic garbage is by the dry method modification activation treatment of tensio-active agent, as the filler of macromolecular material.
2. the purposes of fly ash from burning city domestic garbage according to claim 1, it is characterized in that: described flying dust by the dry method modification activation treatment of tensio-active agent is: earlier incineration of refuse flyash is carried out superfine grinding to 500 orders-1200 order, oven dry, measure the flying dust powder of oven dry then: the weight percent of tensio-active agent=100: 1-5%, again the flying dust powder is placed the mill jar of high speed kneader/homogenizer to mix, and inject tensio-active agent with the mill pearl; Under high rotating speed, stirred 5-30 minute at last, behind the separation mill pearl, the sealing of modification flying dust powder is preserved.
3. the purposes of fly ash from burning city domestic garbage according to claim 1, it is characterized in that: described filler as macromolecular material uses and divides two classes, one class is when synthesizing acrylic plastering, the loading level of modification flying dust is 10% weight ratio of plastics, every index of polypropylene articles meets national standard, when the loading level that an other class is the modification flying dust is 25% weight ratio of plastics, the requirement that polypropylene articles only reaches the injection moulding class and extrudes flat membrane-based article.
4. flying dust according to claim 2 is by the dry method modification activation treatment of tensio-active agent, it is characterized in that: described tensio-active agent is the anion surfactant that has chelating function and lipophilic group and the above long carbon-chain structure of 8 carbon atoms is arranged, such chelate surfactant is the lemon acid type, or EDTA type, or the organophosphorus acid type, or amino acid pattern.
5. flying dust according to claim 2 is by the dry method modification activation treatment of tensio-active agent, and it is characterized in that: described lemon acid type is a glyceryl stearate citrate; The EDTA type is N-lauroyl ethylenediamine triacetic acid C
20H
36O
7N
2And its esters; The organophosphorus acid type is onodoidecyl phosphonic acid fat and its esters; Amino acid pattern is sodium lauroyl sareosine/potassium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610023336 CN1810894A (en) | 2006-01-16 | 2006-01-16 | Use of fly ash from burning city domestic garbage |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610023336 CN1810894A (en) | 2006-01-16 | 2006-01-16 | Use of fly ash from burning city domestic garbage |
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| CN1810894A true CN1810894A (en) | 2006-08-02 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104371178A (en) * | 2014-11-24 | 2015-02-25 | 扬州大学 | Method for preparing high polymer composite material by taking garbage power generation flying ash as raw material |
| CN107245167A (en) * | 2017-07-13 | 2017-10-13 | 浙江工业大学温州科学技术研究院 | A kind of compounded rubber reinforcing agent and its preparation method and application |
| CN107286429A (en) * | 2017-07-13 | 2017-10-24 | 浙江工业大学温州科学技术研究院 | A kind of method of incineration of refuse flyash recycling and products thereof |
| CN107337834A (en) * | 2017-07-13 | 2017-11-10 | 浙江工业大学温州科学技术研究院 | A kind of incineration of refuse flyash filling master batch and its preparation method and application |
| CN113351621A (en) * | 2021-06-01 | 2021-09-07 | 成都锐思环保技术股份有限公司 | Method for recycling high-salt-content product with zero emission of desulfurization wastewater |
| CN115124783A (en) * | 2022-07-11 | 2022-09-30 | 金旸（厦门）新材料科技有限公司 | Reinforced blow molding polypropylene composite material and preparation method thereof |
| CN115365281A (en) * | 2022-07-04 | 2022-11-22 | 上海隅田环保科技有限公司 | Low-temperature catalytic detoxification and resource treatment method for household garbage incineration fly ash |
| CN116407800A (en) * | 2023-04-10 | 2023-07-11 | 西南科技大学 | Method for removing heavy metals in waste incineration fly ash through EDTA ball milling reaction |
-
2006
- 2006-01-16 CN CN 200610023336 patent/CN1810894A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104371178A (en) * | 2014-11-24 | 2015-02-25 | 扬州大学 | Method for preparing high polymer composite material by taking garbage power generation flying ash as raw material |
| CN107245167A (en) * | 2017-07-13 | 2017-10-13 | 浙江工业大学温州科学技术研究院 | A kind of compounded rubber reinforcing agent and its preparation method and application |
| CN107286429A (en) * | 2017-07-13 | 2017-10-24 | 浙江工业大学温州科学技术研究院 | A kind of method of incineration of refuse flyash recycling and products thereof |
| CN107337834A (en) * | 2017-07-13 | 2017-11-10 | 浙江工业大学温州科学技术研究院 | A kind of incineration of refuse flyash filling master batch and its preparation method and application |
| CN107286429B (en) * | 2017-07-13 | 2019-07-23 | 浙江工业大学温州科学技术研究院 | A kind of method and products thereof of incineration of refuse flyash recycling |
| CN107245167B (en) * | 2017-07-13 | 2019-10-29 | 浙江工业大学温州科学技术研究院 | A kind of compounded rubber reinforcing agent and its preparation method and application |
| CN107337834B (en) * | 2017-07-13 | 2020-04-21 | 浙江工业大学温州科学技术研究院 | Waste incineration fly ash filling master batch and preparation method and application thereof |
| CN113351621A (en) * | 2021-06-01 | 2021-09-07 | 成都锐思环保技术股份有限公司 | Method for recycling high-salt-content product with zero emission of desulfurization wastewater |
| CN115365281A (en) * | 2022-07-04 | 2022-11-22 | 上海隅田环保科技有限公司 | Low-temperature catalytic detoxification and resource treatment method for household garbage incineration fly ash |
| CN115365281B (en) * | 2022-07-04 | 2024-05-24 | 上海隅田环保科技有限公司 | Low-temperature catalytic detoxification recycling treatment method for household garbage incineration fly ash |
| CN115124783A (en) * | 2022-07-11 | 2022-09-30 | 金旸（厦门）新材料科技有限公司 | Reinforced blow molding polypropylene composite material and preparation method thereof |
| CN116407800A (en) * | 2023-04-10 | 2023-07-11 | 西南科技大学 | Method for removing heavy metals in waste incineration fly ash through EDTA ball milling reaction |
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