CN1244415C - Treating method for city life garbage burning flyash - Google Patents
Treating method for city life garbage burning flyash Download PDFInfo
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- CN1244415C CN1244415C CN 200410054316 CN200410054316A CN1244415C CN 1244415 C CN1244415 C CN 1244415C CN 200410054316 CN200410054316 CN 200410054316 CN 200410054316 A CN200410054316 A CN 200410054316A CN 1244415 C CN1244415 C CN 1244415C
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- fly ash
- flying dust
- active agent
- surface active
- ionic surface
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Abstract
The present invention relates to a method for treating the burnt fly ash of urban domestic garbage, which belongs to the technical fields of environmental protection and the chemical technology of powder surface modification. The method for treating the burnt fly ash of urban domestic garbage adopts a non-ionic surfactant, more specifically the non-ionic surfactant whose lipophilic group in the molecular structure has a long C-H chain with more than 8 carbon atoms. The modification technology for the fly ash by a wet method comprises the following steps: a certain amount of fly ash is firstly weighed and is added to a water solution; the solution is put into a stirrer to be heated in a water bath for increasing the temperature to be 60 DEG C to 80 DEG C, and is stirred for 10 minutes to 30 minutes; then, 1.0% to 2.5% of specific non-ionic surfactant with the main component of isooctyl palmitate C24H48O2 is added; the rotary speed of the stirrer is kept at 1000RPM, and the mixture is continuously stirred for 20 minutes to 30 minutes under the condition of constant temperature; then, a solid is separated from a liquid; the modified fly ash is dried at the temperature of 105 DEG C for 24 hours, and is finally sieved and hermetically conserved.
Description
Technical field
The present invention relates to the processing method of fly ash from burning city domestic garbage, belong to environmental protection and powder surface modification chemical process technology field.
Background technology
Dangerous Hazardous Waste Management is a part of global environment problem, also is an outstanding problem of China environmental protection, and city garbage burning is the important means that domestic waste is disposed, and burning process will produce a large amount of flying dusts.Contain heavy metals such as many harmful lead, cadmium, zinc in the incineration of refuse flyash, the more important thing is, flying ash enrichment simultaneously has toxic components such as carcinogenesis De bioxin and furans to human body, domestic and international existing environmental legislation classifies as hazardous waste with it, emphasizes to give safe disposal.
Shanghai disposition of solid waste planning according to the Shanghai City government permission, by 2010, Shanghai will form the development pattern of inner city house refuse based on burning disposal, at present, the 600000 tons of waste incinerations in Shanghai will produce nearly 20,000 tons of MSW flying dusts every year, and Shanghai flying ash generation will reach 7 ~ 80,000 tons/year in 2010.
At present Shanghai adopts the security landfill method to dispose flying dust, and not only the landfill disposal costs is very high, and the method for security landfill has simultaneously taken a large amount of land resource, and obviously, this and existing Shanghai land resource, financial resource are conflicting.Simultaneously the security landfill method with the viewpoint of recycling economy and energy sustainable development deviate from mutually.
On the other hand, the surge of the total output of China's plastic products surpasses 1,500 ten thousand tons, wherein is used for filling-modified inorganic non-metallic mineral powder material, and year consumption figure is above 2,000,000 tons.If the flying dust after the modification is made the filler of high molecular polymer.Not only can reduce the production cost of plastic products, and have great environmental protection meaning.
In general, the filler that plastics are made in the flying dust modification is one of method of present safe handling and recycling the best, and the flying dust recycling mainly concentrates on the following aspects both at home and abroad: in Japan, flying dust and end slag mix to be made as eco-cement (1); (2) U.S. and other American-European developed countries make the alternative aggregate of cement concrete and pitch with mixed ash; (3) fusing fly ash is made the raw material of devitrified glass.But the processing of these resources fails to solve actual engineering problem: it is troubling all the time that the heavy metal ion after (1) resource in the flying dust leaches problem; (2) flying dust resource cost is too high, is not suitable for producing in batches; (3) added value of flying dust resource product is low.
Summary of the invention
The objective of the invention is to utilize city garbage burning flying ash, the modification by surfactant is handled, and forms the nonmetallic mineral filler, for the resource of flying dust provides a brand-new outlet.
The objective of the invention is by the following technical programs to reach with measure.
A kind of processing method of fly ash from burning city domestic garbage is characterized in that adopting non-ionic surface active agent, specifically adopts to have that lipophilic group is the non-ionic surface active agent with the above long hydrocarbon chain of 8 carbon atoms in the molecular structure; The modified technique step of flying dust is as follows: take by weighing a certain amount of flying dust earlier, sieve through Taylor standard sieve, flying dust is added in the aqueous solution, making the ratio of mud is 2-20: 1 suspended emulsion, put into mixer then, the water-bath heat temperature raising is to 60-80 ℃, and stirs 10-30 minute; Add the described non-ionic surface active agent of the 1.0-2.5% of flying dust weight then, be mainly isobutyl palmitate C
24H
48O
2, i.e. hexadecylic acid-2-Octyl Nitrite; Under temperature-resistant situation, rotating speed remains on 1000RPM to be continued down to stir 20-30 minute, and fly ash granule and isobutyl palmitate are fully reacted; Separation of Solid and Liquid is dried the flying dust after the modification 24 hours down at 105 ℃ then, sieves and seal preservation at last.
Non-ionic surface active agent of the present invention has multiple, and all to have lipophilic group be that the non-ionic surface active agent of 8 long carbon-chain structures of above carbon atom can use, and processing step can carry out by the same manner.This kind non-ionic surface active agent can be the different monooctyl ester of stearic acid, i.e. stearic acid-2-Octyl Nitrite; The different lactone of myristic acid, the i.e. different lactone of tetradecanoic acid; Polyoxyethylene sorbic alcohol monolaurate.
Used specific non-ionic surface active agent in the inventive method, flying dust after the modification, its surface coverage one deck non-ionic surface active agent, formed the connection bridge between flying dust and plastics or the rubber, and be filled in the high molecular polymer, the heavy metal ion in the flying dust is had stronger solidification; In addition, the flying dust after the modification shows as strong hydrophobicity, and its hydrophily of unmodified flying dust is very strong.
Owing to contain the above long carbochain hydrophobic grouping of 8 carbon atoms in the non-ionic surface active agent structure, make fly ash granule obtain activation.Its activation rate of flying dust after the modification is up to more than 95%.
Fly ash from burning city domestic garbage contains calcium element silicon composition, and the composition of its mineral composition and wollastonite is similar, and present mainly being used in after Wollastonite modified made filler in plastics/rubber.Can be used for the substituted for silicon lime stone after the flying dust modification makes the filler of plastics/rubber.Can effectively handle a large amount of fly ash from burning city domestic garbage like this, help environmental protection and save limited land resources.Flying dust replaces wollastonite simultaneously, can solve domestic mineral filler problem of shortage.
Specific implementation method
Embodiment one: by the oven dry of a certain amount of flying dust, use the Taylor standard sieve mistake, make by 125 μ m sieve apertures, take by weighing 100 gram flying dusts then, add the 0.5 liter aqueous solution, make the ratio of mud and be 5: 1 suspension, put into mixer then and stir.Warming-in-water to 80 ℃, and stirred 10 minutes, adding non-ionic surface active agent isobutyl palmitate 1.8 grams then, it has the molecular structure of ten six carbon atom long-chains, i.e. C
24H
48O
2, another name hexadecylic acid-2-Octyl Nitrite, under temperature-resistant situation, rotating speed remains on 1000rpm to be continued to stir 30 minutes down, and fly ash granule and isobutyl palmitate are fully reacted; Separation of Solid and Liquid is dried by the fire the flying dust after the modification 24 hours down at 105 ℃ then, sieve at last, and sealing is preserved.
Embodiment two: by the oven dry of a certain amount of flying dust, use the Taylor standard sieve mistake, make by 125 μ m sieve apertures, take by weighing 100 gram flying dusts then, add the 1 liter aqueous solution, make the ratio of mud and be 10: 1 suspension, put into mixer then and stir.Warming-in-water to 70 ℃, and stirred 15 minutes, adding 2.0 milliliters of the different monooctyl esters of non-ionic surface active agent stearic acid then, it has the molecular structure of 18 carbon atom long-chains, i.e. C
17H
35COOCH
2CHC (C
2H
5) CH
2CH
2CH
2CH
3, another name stearic acid-2-Octyl Nitrite, under temperature-resistant situation, rotating speed remains on 1000rpm to be continued to stir 30 minutes down, and the different monooctyl ester of fly ash granule and stearic acid is fully reacted; Separation of Solid and Liquid is dried by the fire the flying dust after the modification 24 hours down at 105 ℃ then, sieve at last, and sealing is preserved.
Embodiment three: by the oven dry of a certain amount of flying dust, use the Taylor standard sieve mistake, make by 125 μ m sieve apertures, take by weighing 100 gram flying dusts then, add the 2 liter aqueous solution, make the ratio of mud and be 20: 1 suspension, put into mixer then and stir.Warming-in-water to 60 ℃, and stirred 15 minutes, adding 1.4 milliliters of the different lactones of non-ionic surface active agent tetradecanoic acid then, it has the molecular structure of ten four carbon atom long-chains, i.e. C
13H
27COOCH
2CH (CH
3)
2, the different lactone of another name myristic acid, under temperature-resistant situation, rotating speed remains on 1000rpm to be continued to stir 20 minutes down, and the different lactone of fly ash granule and tetradecanoic acid is fully reacted; Separation of Solid and Liquid is dried by the fire the flying dust after the modification 24 hours down at 105 ℃ then, sieve at last, and sealing is preserved.
Embodiment four: by the oven dry of a certain amount of flying dust, use the Taylor standard sieve mistake, make by 125 μ m sieve apertures, take by weighing 100 gram flying dusts then, add the 1 liter aqueous solution, make the ratio of mud and be 10: 1 suspension, put into mixer then and stir.Warming-in-water to 75 ℃, and stirred 10 minutes, add 1.8 milliliters of non-ionic surfactant polyoxyethylene sorbic alcohol monolaurates then, it has the molecular structure of 12 carbon atom long-chains, under temperature-resistant situation, rotating speed remains on 1000rpm to be continued down to stir 20 minutes, and fly ash granule and polyoxyethylene sorbic alcohol monolaurate are fully reacted; Separation of Solid and Liquid is dried by the fire the flying dust after the modification 24 hours down at 105 ℃ then, sieve at last, and sealing is preserved.。
Test by each sample of the foregoing description, learn that its activation rate of flying dust after the modification can be up to more than 95%, infrared spectrum characteristic peak contrast to modification flying dust and original flying dust, occurred new characteristic absorption peak in the modification flying dust, proved that the fly ash granule surface is coated with a certain amount of non-ionic surface active agent.
The present invention compares with other nonmetallic mineral modifications:
Compare with other nonmetallic mineral fillers, the particle diameter of flying dust is evenly distributed, and 95wt% is below 200 μ m, and the flying dust source is wide, and cost is low; Flying dust activation rate height after the modification, the scope of acid and alkali-resistance is wide.
The present invention compares with other flying dust method of resource:
The cost of flying dust modification is low, the value-added content of product height. After the test of the TCLP of Environmental Protection in America office method, flying dust Middle Pb2+、Zn
2+And Cd2+(because funds are limited, it is molten that the present invention only measures the leaching of above-mentioned 3 heavy metal species ions Degree) leaching solubility is all far below national standard. These all are obvious advantages of the present invention.
Claims (4)
1. the processing method of a fly ash from burning city domestic garbage is characterized in that adopting non-ionic surface active agent, specifically adopts to have that lipophilic group is the non-ionic surface active agent with the above long hydrocarbon chain of 8 carbon atoms in the molecular structure; The wet flyash modifying process step is as follows: take by weighing a certain amount of flying dust earlier, sieve through Taylor standard sieve, flying dust is added in the aqueous solution, making the ratio of mud is 2-20: 1 suspended emulsion, put into mixer then, the water-bath heat temperature raising is to 60-80 ℃, and stirs 10-30 minute; Add the described non-ionic surface active agent of the 1.0-2.5% of flying dust weight then, be mainly isobutyl palmitate C
24H
48O
2, i.e. hexadecylic acid-2-Octyl Nitrite; Under temperature-resistant situation, rotating speed remains on 1000RPM to be continued down to stir 20-30 minute, and fly ash granule and isobutyl palmitate are fully reacted; Separation of Solid and Liquid is dried the flying dust after the modification 24 hours down at 105 ℃ then, sieves and seal preservation at last.
2. the processing method of a kind of fly ash from burning city domestic garbage according to claim 1 is characterized in that described non-ionic surface active agent can adopt the different monooctyl ester of stearic acid, i.e. stearic acid-2-ethylhexyl ester.
3. the processing method of a kind of fly ash from burning city domestic garbage according to claim 1 is characterized in that described non-ionic surface active agent can adopt the different lactone of myristic acid, i.e. the different lactone of tetradecanoic acid.
4. the processing method of a kind of fly ash from burning city domestic garbage according to claim 1 is characterized in that described non-ionic surface active agent can adopt polyoxyethylene sorbic alcohol monolaurate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410054316 CN1244415C (en) | 2004-09-07 | 2004-09-07 | Treating method for city life garbage burning flyash |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410054316 CN1244415C (en) | 2004-09-07 | 2004-09-07 | Treating method for city life garbage burning flyash |
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| Publication Number | Publication Date |
|---|---|
| CN1586744A CN1586744A (en) | 2005-03-02 |
| CN1244415C true CN1244415C (en) | 2006-03-08 |
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|---|---|---|---|
| CN 200410054316 Expired - Fee Related CN1244415C (en) | 2004-09-07 | 2004-09-07 | Treating method for city life garbage burning flyash |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101428290B (en) * | 2008-11-19 | 2010-06-02 | 沈恩善 | Method for treating garbage burning flying ash |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102060456B (en) * | 2010-11-22 | 2013-05-01 | 同济大学 | Method for solidifying waste incineration fly ash into high-strength materials |
| CN102259108A (en) * | 2011-06-02 | 2011-11-30 | 武汉致衡环境安全工程技术有限公司 | Technology for gelatinizing and solidifying waste incineration fly ash |
| KR101265740B1 (en) * | 2013-01-16 | 2013-05-20 | 배희동 | Development of integrated process technology for renewable energy and feed resources production with palm oil mill effluent, palm oil decanter cake, palm kernel shell and palm kernel cake from palm oil mill process |
| CN105498146A (en) * | 2015-12-25 | 2016-04-20 | 重庆科技学院 | Incineration fly ash bi-component heavy metal stabilizer and fly ash treatment method applying same |
| CN113814252A (en) * | 2020-06-18 | 2021-12-21 | 中国石油化工股份有限公司 | Solid hazardous waste slurry preparation system and preparation method thereof |
-
2004
- 2004-09-07 CN CN 200410054316 patent/CN1244415C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101428290B (en) * | 2008-11-19 | 2010-06-02 | 沈恩善 | Method for treating garbage burning flying ash |
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| Publication number | Publication date |
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| CN1586744A (en) | 2005-03-02 |
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