CN101353728A - Heavy metal assisting solvent for incineration of refuse flyash - Google Patents
Heavy metal assisting solvent for incineration of refuse flyash Download PDFInfo
- Publication number
- CN101353728A CN101353728A CNA2007101430539A CN200710143053A CN101353728A CN 101353728 A CN101353728 A CN 101353728A CN A2007101430539 A CNA2007101430539 A CN A2007101430539A CN 200710143053 A CN200710143053 A CN 200710143053A CN 101353728 A CN101353728 A CN 101353728A
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- heavy metal
- fluxing
- incineration
- acid
- hydrochloric acid
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The invention relates to a heavy metal latent solvent used for waste incineration fluxing, containing surfactant, chelating agent, and hydrochloric acid and nitric acid used for promoting the dissolving and transfer of heavy metal; according to molar concentration, the ratio of the surfactant, the chelating agent, the hydrochloric acid and the nitric acid is 0.7 to 1 : 0.7 to 1 : 1 to 1.5 : 1 to 1.5, wherein, the surfactant is sodium dodecyl sulfate, and the chelating agent is ethylene diamine tetraacetic acid. By adding the latent solvent of the invention during the processing process of the waste fluxing, the surface tension of the fluxing can be effectively reduced, the dissolving and transfer capability of the heavy metal can be enhanced, and the recycling of the heavy metal in the fluxing can be realized. The latent agent of the invention can damage the surface tension of the fluxing and form a chelate complex with the heavy metal, meanwhile, the metal chelate complex is promoted to transfer to liquid phase. Leach liquor can also recycle the heavy metal by further treatment, meanwhile, EDTA recycling can be realized, and the method is beneficial to reducing the engineering technology cost.
Description
Technical field
The invention belongs to the solid waste disposal technical field, relate to a kind of heavy metal assisting solvent that is used for incineration of refuse flyash particularly.
Background technology
The flying dust that the waste incineration process produces is rich in heavy metal, these heavy metals may ooze out and contaminated soil and underground water under the control environment condition, jeopardize the ecosystem and HUMAN HEALTH, China and a lot of in the world country all classify incineration of refuse flyash as Hazardous wastes, need safe handling to dispose.Mainly contain both direction for the flying dust Processing Technology at present, the first adopts the solidified method that the heavy metal in the flying dust is fixed, landfill is disposed then, for example cement solidification technology, sintering technology, chelating technology, melting and solidification technology etc., domestic in recent years have a lot of achievements in research in this respect; It two is that the method that heavy metal extracts leaches the dissolving of the heavy metal in the flying dust, then adopt precipitation or electrolytic method to realize the recovery of heavy metal, the risk that flying dust after the processing does not exist heavy metal to leach, can be according to general waste treatment or direct utilization, external research in this regard is more.Along with the shortage of heavy metal resources, from refuse, reclaim the attention that heavy metal is subjected to the investigator day by day, adopt the mode of extracting to realize that fly-ash heavy metal reclaims the developing direction that meets conservation-minded society.
Summary of the invention
The object of the present invention is to provide a kind of heavy metal assisting solvent that is used for incineration of refuse flyash, extract with the removal that realizes heavy metal in the incineration of refuse flyash.
For achieving the above object, the heavy metal assisting solvent that is used for incineration of refuse flyash provided by the invention contains tensio-active agent, sequestrant, and the hydrochloric acid and the nitric acid that promote heavy metal dissolving and migration; Count tensio-active agent: sequestrant: hydrochloric acid: nitric acid=0.7-1: 0.7-1: 1-1.5: 1-1.5 in molar ratio.
The described heavy metal assisting solvent that is used for incineration of refuse flyash, wherein, tensio-active agent is a sodium lauryl sulphate, sequestrant is a hexamethylene dinitrilo-tetraacetic acid.
The described heavy metal assisting solvent that is used for incineration of refuse flyash, wherein, the concentration of sodium lauryl sulphate (SDS) is that the concentration of 0.05-0.1mol/L, hexamethylene dinitrilo-tetraacetic acid (EDTA) is that the concentration of 0.05-0.1mol/L, hydrochloric acid is that the concentration of 1-1.5mol/L, nitric acid is 1-1.5mol/L.
In the garbage flying ash treating processes, add solubility promoter of the present invention, can effectively lower the surface tension of flying dust, strengthen heavy metal dissolving transfer ability, can realize the recycling of heavy metal in the flying dust.Solubility promoter of the present invention can destroy the flying dust surface tension, and forms inner complex with heavy metal, promotes metallo-chelate to migration of liquid again simultaneously.Leach liquor can also reclaim heavy metal through further processing, realizes the EDTA recycle simultaneously, helps having reduced the engineering cost.
Embodiment
The present invention leaches on the basis of mechanism at the further investigation fly-ash heavy metal, has proposed to utilize the compound action of tensio-active agent and acid solution, realizes the method that fly-ash heavy metal extracts, and helps realizing the flying dust resource utilization.
Contain tensio-active agent, sequestrant in the solubility promoter of the present invention, and the hydrochloric acid and the nitric acid that promote heavy metal dissolving and migration.Proportioning each other is by mole densitometer, tensio-active agent: sequestrant: hydrochloric acid: nitric acid=0.7-1: 0.7-1: 1-1.5: 1-1.5.
Wherein: tensio-active agent is sodium lauryl sulphate (SDS), and sequestrant is hexamethylene dinitrilo-tetraacetic acid (EDTA).
Also can select volumetric molar concentration for use is the sodium lauryl sulphate (SDS) of 0.05-0.1mol/L, the hexamethylene dinitrilo-tetraacetic acid (EDTA) of 0.05-0.1mol/L, hydrochloric acid with 1-1.5mol/L, 1-1.5mol/L nitric acid be raw material, in a mole concentration 0.7-1: the ratio preparation of 0.7-1: 1-1.5: 1-1.5.
Its raw material of solubility promoter provided by the invention is easy to get, effective, safety and environmental protection, and the part material can reusable characteristics.Use the flying dust after this solubility promoter is handled, heavy metal content reduces greatly, does not have leaching toxicity, also reaches the innoxious purpose of incineration of refuse flyash when realizing the flying dust resource utilization.
Add the above-mentioned solubility promoter of the present invention in incineration of refuse flyash, handling, can promote the dissolving and the migration of heavy metal heavy metal, can improve the activation index of flying dust, promote efficient dissolving of fly-ash heavy metal and migration, help the recovery of fly-ash heavy metal, can realize that heavy metal reclaims, for the flying dust resource utilization provides valid approach more.
Embodiment 1
Get the hexamethylene dinitrilo-tetraacetic acid (EDTA) of the sodium lauryl sulphate that concentration is 0.1mol/L (SDS), 0.1mol/L, the hydrochloric acid of 1mol/L and the nitric acid of 1mol/L, calculated 1: 1: 10: 10 uniform mixing preparation solubility promoter according to volumetric molar concentration.Flying dust is taken from Shanghai municipal solid waste incinerator sack cleaner, and fly-ash heavy metal content sees Table 1.
Table 1 Shanghai fly-ash heavy metal content (μ g/g)
Get the solubility promoter 100mL that finishes of preparation, be diluted with water to 1000ML, then the 500g flying dust is mixed with solubility promoter after the dilution, and evenly stirring 20 minutes under 80 ℃ of conditions, centrifugal 8 minutes of whizzer used, the extracting centrifugal liquid analysis.The result confirms the leaching rate of solubility promoter to Cr, Cu, Zn, Cd, Pb, is respectively 82.1%, 86.9%, 91.1%, 71.3% and 90.6%.
Embodiment 2
Get the hexamethylene dinitrilo-tetraacetic acid (EDTA) of the sodium lauryl sulphate that concentration is 0.05mol/L (SDS), 0.05mol/L, the hydrochloric acid of 1mol/L and the nitric acid of 1mol/L, calculated 1: 1: 10: 10 uniform mixing preparation solubility promoter by the mole densitometer.Flying dust is taken from Shenzhen municipal solid waste incinerator sack cleaner, and fly-ash heavy metal content sees Table 2.
Table 2 Shenzhen fly-ash heavy metal content (μ g/g)
Get the solubility promoter 100mL that finishes of preparation, be diluted with water to 1000ML, then the 500g flying dust is mixed with hydrotropy liquor after the dilution, and evenly stirring 20 minutes under 80 ℃ of conditions, centrifugal 8 minutes of whizzer used, the extracting centrifugal liquid analysis.The result confirm solubility promoter to Cr, Cu, Zn, Cd, Pb and leaching rate reached 72.1%, 92.9%, 81.1%, 75.3% and 78.8% respectively.
The present invention has following advantage:
1) can realize heavy metal high efficiency extraction in the flying dust.
2) the leaching agent cost is low, the economic benefit height
3) part material can recycle in the leaching agent, saves operating cost.
Claims (3)
1, a kind of heavy metal assisting solvent that is used for incineration of refuse flyash contains tensio-active agent, sequestrant, and the hydrochloric acid and the nitric acid that promote heavy metal dissolving and migration; Count tensio-active agent: sequestrant: hydrochloric acid: nitric acid=0.7-1: 0.7-1: 1-1.5: 1-1.5 in molar ratio.
2, the heavy metal assisting solvent that is used for incineration of refuse flyash according to claim 1, wherein, tensio-active agent is a sodium lauryl sulphate, sequestrant is a hexamethylene dinitrilo-tetraacetic acid.
3, as being used for the heavy metal assisting solvent of incineration of refuse flyash as described in the claim 2, wherein, the concentration of sodium lauryl sulphate is that the concentration of 0.05-0.1mol/L, hexamethylene dinitrilo-tetraacetic acid is that the concentration of 0.05-0.1mol/L, hydrochloric acid is that the concentration of 1-1.5mol/L, nitric acid is 1-1.5mol/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710143053A CN100575510C (en) | 2007-07-27 | 2007-07-27 | A kind of heavy metal assisting solvent that is used for incineration of refuse flyash |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710143053A CN100575510C (en) | 2007-07-27 | 2007-07-27 | A kind of heavy metal assisting solvent that is used for incineration of refuse flyash |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101353728A true CN101353728A (en) | 2009-01-28 |
| CN100575510C CN100575510C (en) | 2009-12-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200710143053A Expired - Fee Related CN100575510C (en) | 2007-07-27 | 2007-07-27 | A kind of heavy metal assisting solvent that is used for incineration of refuse flyash |
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| CN (1) | CN100575510C (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102019111B (en) * | 2009-09-15 | 2013-01-16 | 北京建筑材料科学研究总院有限公司 | Additive for reducing moisture content of fly ash filter cakes generated from waste incineration |
| CN103512930A (en) * | 2012-06-18 | 2014-01-15 | 栗田工業株式会社 | Method for determining adding amount of organic chelate heavy metal fixing agent |
| 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 |
| CN106267680A (en) * | 2016-08-29 | 2017-01-04 | 徐亚军 | Garbage flying ash stablizes modifying agent and preparation method thereof |
| CN107435101A (en) * | 2017-08-25 | 2017-12-05 | 昆明理工大学 | A kind of method for reclaiming palladium in useless palladium carbon catalyst |
| WO2018148869A1 (en) * | 2017-02-14 | 2018-08-23 | 深圳市能源环保有限公司 | Leaching solution for waste incineration fly ash chelate and preparation and application methods therefor |
| 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 |
| CN114669587A (en) * | 2022-03-28 | 2022-06-28 | 中国环境科学研究院 | Method for leaching fly ash from domestic garbage co-processing membrane concentrated solution, obtained residue and application |
-
2007
- 2007-07-27 CN CN200710143053A patent/CN100575510C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102019111B (en) * | 2009-09-15 | 2013-01-16 | 北京建筑材料科学研究总院有限公司 | Additive for reducing moisture content of fly ash filter cakes generated from waste incineration |
| CN103512930A (en) * | 2012-06-18 | 2014-01-15 | 栗田工業株式会社 | Method for determining adding amount of organic chelate heavy metal fixing agent |
| 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 |
| CN106267680A (en) * | 2016-08-29 | 2017-01-04 | 徐亚军 | Garbage flying ash stablizes modifying agent and preparation method thereof |
| WO2018148869A1 (en) * | 2017-02-14 | 2018-08-23 | 深圳市能源环保有限公司 | Leaching solution for waste incineration fly ash chelate and preparation and application methods therefor |
| CN107435101A (en) * | 2017-08-25 | 2017-12-05 | 昆明理工大学 | A kind of method for reclaiming palladium in useless palladium carbon catalyst |
| 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 |
| CN114669587A (en) * | 2022-03-28 | 2022-06-28 | 中国环境科学研究院 | Method for leaching fly ash from domestic garbage co-processing membrane concentrated solution, obtained residue and application |
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| Publication number | Publication date |
|---|---|
| CN100575510C (en) | 2009-12-30 |
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Granted publication date: 20091230 Termination date: 20100727 |