CN102009061A - Method for stabilizing fly ash of municipal solid waste incinerator by using artificial sea water - Google Patents
Method for stabilizing fly ash of municipal solid waste incinerator by using artificial sea water Download PDFInfo
- Publication number
- CN102009061A CN102009061A CN 201010543472 CN201010543472A CN102009061A CN 102009061 A CN102009061 A CN 102009061A CN 201010543472 CN201010543472 CN 201010543472 CN 201010543472 A CN201010543472 A CN 201010543472A CN 102009061 A CN102009061 A CN 102009061A
- Authority
- CN
- China
- Prior art keywords
- flying dust
- fly ash
- heavy metal
- sea salt
- sea water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Processing Of Solid Wastes (AREA)
Abstract
The invention provides a method for stabilizing fly ash of a municipal solid waste incinerator by using artificial sea water, and relates to a process for stabilizing heavy metals in the fly ash of the municipal solid waste incinerator. The method comprises the following steps of: weighing the fly ash and sea salt in a mass ratio of 1:0.01-0.5; weighing distilled water and the sea salt in the mass ratio of 30 to 1; dissolving the sea salt into the distilled water to make the artificial sea water; adding the fly ash into the artificial sea water; stirring for 10 to 30min to generate heavy mortar mixture; drying and maintaining the heavy mortar mixture for 2 to 3 days under a natural ventilating condition, and detecting that immersion of the heavy metals in the mixture meets the safe landfill requirement of 'Identification Standards for Hazardous Wastes-Identification for Extraction Toxicity' (GB5085.3-2007). The invention has the advantages of readily available raw materials and low cost, and cannot generate secondary pollution to the environment.
Description
Technical field
The present invention relates to a kind of heavy metal stabilization method of municipal solid waste incinerator flying dust.The stabilization processes technical field that belongs to danger wastes in the environmental project.
Technical background
Along with China's rapid development of economy, the rapid raising of living standards of the people, the continuous quickening of urbanization process, China's annual production of house refuse per capita is 300kg, growth rate is 5%～8%, and a plurality of cities face the awkward situation that is surrounded by rubbish, and the garbage disposal problem can not be ignored.Because the consumer waste incineration processing speed is fast, floor space is few, and minimizing and innoxious effect are remarkable, so the consumer waste incineration processing more and more comes into one's own.But, volume only for 3%～5% flying dust enrichment of the amount of burning away the refuse a large amount of harmful substances, must carry out special management by hazardous waste.Studies show that according to relevant the main component of flying dust has Si, Ca, Al, Fe, K, Na, Cl etc., contents of heavy metal elements are all 0.5%～3.0% ask.Contain higher Cd, Pb, CU in the leachate of flying dust, heavy metal element such as Zn and Cr and salt, and heavy metal is because it has acute or chronic toxicity, very harmful to human body, therefore, how to handle the disposal flying dust safely and effectively and become current environment that needs to be resolved hurrily and social concern.
At present, be used for the technology that heavy metal stabilization handles cement/lime solidification and stabilization and chemical stabilization arranged.For cement/lime solidification and stabilization, because its definite containing mechanism and also not enough to the understanding of the long-term action of firming body in the different chemical environment, after inclusion body broke, heavy metal can reenter and cause unpredictalbe influence in the environment.In addition, the increase-volume phenomenon of firming body also can further influence its application in practice.The stabilisation medicament that adopts during heavy metal in the with medicament stabilisation flying dust has gypsum, phosphate, and bleaching powder, sulfide (sodium thiosulfate, vulcanized sodium) and macromolecule organic stabilizer have the research that utilizes ferrite to handle flying dust in addition.Its principle is to make heavy metal change low-solubility into by chemical reaction, low migration, and hypotoxic material when realizing that flying dust is innoxious, can be realized its perhaps not increase-volume that reduces, and improves the economy that its overall process is disposed.Organic medicament (as organic polyphosphoric acids and its esters) is when stablizing flying dust, though it has stablizing effect preferably to heavy metal, but, seldom be used in the reality because problems such as the production cost of its medicament and raw material source make that the processing cost of employing the method is higher.Find when adopting vulcanized sodium and thiocarbamide to compare when handling the disposal flying dust as certain garbage burning factory, when the stabilization effect of heavy metal is identical in the flying dust, the use amount of thiocarbamide is 1/2nd of a vulcanized sodium, but because price is four times of vulcanized sodium, so the stable pharmaceutical that adopts practical application the time is a vulcanized sodium.In sum, it is simple to seek technology, and raw material sources are extensive and cheap, and obvious results heavy metal stable pharmaceutical becomes the research focus of present household garbage field flying ash stabilizing.
Publication number CN1986720A, in " chemical stabilizer of disposal of refuse incinerating flyash, heavy metal and micronic dust and the method thereof " patent in June 27 2007 time of disclosure, ore dressing chelating agent and high polymer coagulant are hybridly prepared into chemical stabilizer, mixing the back with water adds in the flying dust, evenly stir, promptly reach the requirement of GB5085.3-1996 after the drying.Characteristics are with the heavy metal stabilization in the flying dust time, have reduced flying dust and have blown the possibility that erosion enters atmosphere and water body environment with water with the wind.
In " a kind of stabilizing fly ash of municipal incinerator and the method for resource thereof " in publication number CN October 10 2007 101050076 time of disclosure, utilize flying dust to replace in concrete or the mortar 5%～25% fine aggregate (sand) to make concrete segment, stablize the heavy metal in the flying dust by " sulfuration of aquation---carbonic hydroammonium carbonating---ammonium sulfide ", it is stablized with water-fast form.Its weak point is that the existence condition and time of heavy metal of water insoluble form is uncertain.Along with the prolongation of time, heavy metal has the danger of stripping again.
Disclosed September 5 2007 date at " a kind of processing method of refuse incinerating flyash and treatment system " publication number CN 101028629, adopt the reaction of poly organic sulfur class chelating agent solution and flying dust, afterwards with under the mixture room temperature ventilation condition maintenance 1-2 days, can stablize the heavy metal in the flying dust, eliminate its environmental risk.Its weak point is that poly organic sulfur class chelating agent costs an arm and a leg, and needs to consider its economy in the actual engineering.
Summary of the invention
The problem to be solved in the present invention is to have deficiency and the high problem of cost at the technology that has domestic garbage incineration flyash heavy metal stable pharmaceutical now, the new medicament of heavy metal in a kind of stable flying dust is proposed, use this chemicals treatment flying dust, with low cost, technology is simple, effect stability, raw material sources are extensive, and can not cause secondary pollution to environment.
In order to achieve the above object, the present invention finds that seawater has the characteristic of heavy metal in the stabilisation municipal solid waste incinerator flying ash, in order to guarantee that heavy metal is stabilized, the present invention is water-soluble according to a certain percentage with sea salt, is mixed with artificial sea water as the medicament of stablizing fly-ash heavy metal; Concrete steps are as follows:
At first, measure flying dust according to mass ratio: sea salt=1: 0.01-0.5, then, measure distilled water according to mass ratio: sea salt=30: 1, sea salt is dissolved in the distilled water, make artificial sea water, in artificial sea water, add flying dust then, continue to stir 10～30min, generate thick shape mortar mix, above-mentioned thick shape mortar mix, is detected and finds heavy metal leaching amount satisfied " the hazardous waste judging standard leaches the toxicity discriminating " requirement (GB5085.3-2007) in the mixture, at last with the mixture security landfill after 2～3 days in dry also maintenance under the condition of gravity-flow ventilation.
Used sea salt brand is HEKA coral king among the present invention, and German Seequasal company makes, the import of Guangzhou moral businessman from Hongkong trade Co., Ltd.
Above-mentioned essential element by the formulated artificial sea water of sea salt is formed as shown in table 1:
Essential element in the table 1 artificial sea water stabilizing agent
| Element | Content (mg/L) | Main existence form |
| Chlorine Cl | 180000～200000 | Cl - |
| Sodium Na | 10000～11000 | Na + |
| Magnesium Mg | 1300～1400 | Mg 2+，MgSO 4 |
| Sulphur S | 800～900 | SO 4 2- |
Heavy metal in the flying dust mainly exists with residual form, with tradable ionic state amount seldom.And when flying dust mixes with the seawater stabilizing agent, stabilizing agent has played excitation, heavy metal ion is settled out in the form with precipitation and co-precipitation, thereby can finish at short notice (after stirring in, because the minimizing of exchangeable species metal, the leaching amount of heavy metal also reduce accordingly).
The present invention has following advantage and effect:
1, the present invention is with Cheap highly effective, the sea salt of wide material sources is raw material, be dissolved in water and be mixed with the stabilizing agent of artificial sea water as heavy metal in the flying dust, when flying dust mixes with artificial sea water, stabilizing agent has played excitation, and heavy metal ion is settled out in the form with precipitation and co-precipitation, reaches the requirement of security landfill.
2, the present invention does not contain the organic compound of difficult degradation, therefore can not occur being trapped in for a long time in the environment because of combine the generation stable compound with heavy metal, causes the phenomenon of secondary pollution to occur.
3, the present invention handles flying dust under the situation of 1: 60 (kg/kg), also satisfy " the hazardous waste judging standard leaches toxicity and differentiates " requirement (GB5085.3-2007), the concentration of the heavy metal lead after the leaching, cadmium, copper, zinc, nickel has all reduced more than 90%, satisfies the hazardous waste judging standard.
4, the stabilizing fly ash method that the present invention proposes need not regulated initial pH value, and simple to operate, disposal cost is cheap, and the flying dust after the processing satisfies " the hazardous waste landfill pollutes control criterion " (GB18598-2001), can directly deliver to landfill yard and handle.
Description of drawings
Fig. 1 is a process chart of the present invention
Fig. 2 is that the heavy metal of embodiments of the invention 1 leaches concentration
Fig. 3 is that the heavy metal of embodiments of the invention 2 leaches concentration
Fig. 4 is that the heavy metal of embodiments of the invention 3 leaches concentration
The specific embodiment
Flying ash adopts semidry method+spray active carbon+bag-type dusting technology incineration flue gas to be handled obtained from the Shanghai garbage incinerating power plant.(GB5086.2-1997) flying ash is carried out leaching experiment according to China's standard method " solid waste leaches the horizontal succusion of toxicity leaching method ", heavy metal concentration is in the employing inductively coupled plasma spectrometry generator mensuration leachate: zinc=0.7455mg/L; Lead=14.23mg/L; Cadmium does not detect; Nickel=0.0135mg/L; Chromium=0.1695mg/L; Copper=0.091mg/L.
Measure distilled water according to mass ratio: sea salt=30: 1, sea salt is dissolved in the distilled water, the sea salt brand is HEKA coral king, makes artificial sea water.
Embodiment 1
Get above-mentioned flying dust 100g as sample, get aforementioned stable agent (artificial sea water) 100ml, stabilizing agent is added in the flying dust, stir 10min, stabiliser solution is mixed fully with flying dust, form thick shape mortar material, heavy metal ion and stabiliser solution in the flying dust react completely, then that said mixture is dry under the condition of gravity-flow ventilation, can enter hazardous waste landfill yard landfill.According to hazardous waste judging standard (GB5086.2-1997), flying dust after handling is carried out toxicity characteristic leaching procedure, the result is as shown in Figure 2: show, exceeding standard, (the leaching concentration of lead=14.23mg/L) is 0.21mg/L to element lead, all the other, zinc concentration is 0.10mg/L, the concentration of chromium is 0.03mg/L, cadmium, nickel, copper all do not detect, and reach the hazardous waste landfill and pollute control criterion (GB18598-2001).
Get flying dust sample 100g, stabilizing agent 50ml, flying dust is identical with embodiment 1 with stabilizing agent.Stabilizing agent is added in the flying dust, stir 20min, stabilizing agent is mixed with flying dust fully, form thick liquid matter, heavy metal ion and stabiliser solution in the flying dust react completely, and be then that said mixture is dry under the condition of gravity-flow ventilation, can enter hazardous waste landfill yard landfill.According to hazardous waste judging standard (GB5086.2-1997), flying dust after handling is carried out toxicity characteristic leaching procedure, the result shows, the leaching concentration of element lead of exceeding standard is 0.15mg/L, all the other, zinc concentration is 0.06mg/L, the concentration of chromium is 0.035mg/L, cadmium, nickel, copper all do not detect, and reach the hazardous waste landfill and pollute control criterion (GB18598-2001).As shown in Figure 3.
Embodiment 3
Get flying dust sample 100g, stabilizing agent 25ml, stabilizing agent is added in the flying dust, stir 30min, stabilizing agent is mixed with flying dust fully, form thick liquid matter, heavy metal ion and stabiliser solution in the flying dust react completely, then that said mixture is dry under the condition of gravity-flow ventilation, can enter hazardous waste landfill yard landfill.According to hazardous waste judging standard (GB5086.2-1997), flying dust after handling is carried out toxicity characteristic leaching procedure, the result shows, the leaching concentration of element lead of exceeding standard is 0.29mg/L, all the other, zinc concentration is 0.045mg/L, the concentration of chromium is 0.08mg/L, cadmium, nickel, copper all do not detect, and reach the hazardous waste landfill and pollute control criterion (GB18598-2001).As shown in Figure 4.
Claims (1)
1. stablize the method for municipal solid waste incinerator flying dust with artificial sea water, it is characterized in that: at first, measure flying dust according to mass ratio: sea salt=1: 0.01-0.5, then, measure distilled water according to mass ratio: sea salt=30: 1, and sea salt is dissolved in the distilled water, make artificial seawater, in artificial seawater, add flying dust then, continue to stir 10～30min, generate thick shape mortar mix, with above-mentioned thick shape mortar mix in dry under the condition of gravity-flow ventilation and maintenance after 2～3 days, detect and find heavy metal leaching amount satisfied " the hazardous waste judging standard leaches toxicity and differentiates " requirement (GB5085.3-2007) in the mixture, at last with the mixture security landfill.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105434723A CN102009061B (en) | 2010-11-12 | 2010-11-12 | Method for stabilizing fly ash of municipal solid waste incinerator by using artificial sea water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105434723A CN102009061B (en) | 2010-11-12 | 2010-11-12 | Method for stabilizing fly ash of municipal solid waste incinerator by using artificial sea water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102009061A true CN102009061A (en) | 2011-04-13 |
| CN102009061B CN102009061B (en) | 2012-11-07 |
Family
ID=43839496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105434723A Expired - Fee Related CN102009061B (en) | 2010-11-12 | 2010-11-12 | Method for stabilizing fly ash of municipal solid waste incinerator by using artificial sea water |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102009061B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001239231A (en) * | 2000-02-29 | 2001-09-04 | Nkk Corp | Method of recovering heavy metals from discharged material in waste incineration facility |
| JP2005118617A (en) * | 2003-10-14 | 2005-05-12 | Nippon Soda Co Ltd | Method for fixing heavy metal in fly ash |
| JP2006136805A (en) * | 2004-11-12 | 2006-06-01 | Ebara Engineering Service Co Ltd | Heavy metals elution prevention agent, and method and apparatus for heavy metals elution prevention by using the same |
| JP2008284522A (en) * | 2007-05-21 | 2008-11-27 | Nippon Steel Engineering Co Ltd | Fly ash treating method |
| CN101509078A (en) * | 2009-02-12 | 2009-08-19 | 深圳市龙澄高科技环保有限公司 | Innocent treatment and reclamation utilization method for flying ash of garbage cremator |
| CN101822886A (en) * | 2010-05-26 | 2010-09-08 | 刘阳生 | Secondary gasification method of fly ash in waste incineration |
-
2010
- 2010-11-12 CN CN2010105434723A patent/CN102009061B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001239231A (en) * | 2000-02-29 | 2001-09-04 | Nkk Corp | Method of recovering heavy metals from discharged material in waste incineration facility |
| JP2005118617A (en) * | 2003-10-14 | 2005-05-12 | Nippon Soda Co Ltd | Method for fixing heavy metal in fly ash |
| JP2006136805A (en) * | 2004-11-12 | 2006-06-01 | Ebara Engineering Service Co Ltd | Heavy metals elution prevention agent, and method and apparatus for heavy metals elution prevention by using the same |
| JP2008284522A (en) * | 2007-05-21 | 2008-11-27 | Nippon Steel Engineering Co Ltd | Fly ash treating method |
| CN101509078A (en) * | 2009-02-12 | 2009-08-19 | 深圳市龙澄高科技环保有限公司 | Innocent treatment and reclamation utilization method for flying ash of garbage cremator |
| CN101822886A (en) * | 2010-05-26 | 2010-09-08 | 刘阳生 | Secondary gasification method of fly ash in waste incineration |
Non-Patent Citations (1)
| Title |
|---|
| 《中国环境科学》 20080711 胡小英等 氯化剂对垃圾焚烧飞灰中重金属挥发特性的影响 第28卷, 第7期 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102009061B (en) | 2012-11-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105238409B (en) | The linkage stabilizer and restorative procedure of restoration of soil polluted by heavy metal | |
| CN104560046B (en) | A kind of contaminated soil passivator and preparation method and application | |
| CN107789787B (en) | Stabilizing agent for repairing arsenic-containing waste residue and using method | |
| CN102416396B (en) | Method for processing incineration fly ash with composite medicament | |
| CN105582638B (en) | Liquid stabilizer for treating waste incineration fly ash with high lead and cadmium content and application thereof | |
| CN107537129A (en) | A kind of heavy metal stabilizer and its application method for administering incineration of refuse flyash | |
| CN105289230B (en) | Incineration of refuse flyash comprehensive stability treatment technology | |
| CN102218428A (en) | Treatment method of arsenic slag | |
| CN100506405C (en) | Chemical process of stabilizing fly ash from incinerating city garbage | |
| CN104418560A (en) | Curing agent for treating heavy metal pollution and heavy metal curing method | |
| CN106966621A (en) | A kind of method that electroplating sludge prepares baking-free ceramicite | |
| CN108409176A (en) | A kind of domestic garbage incineration flyash geopolymer and preparation method thereof | |
| CN101176815B (en) | Method for stabilization processing refuse incineration flying ash | |
| CN105170638A (en) | Green multi-metal cooperation stabilization agent for fly ash and application method for green multi-metal cooperation stabilization agent | |
| Cao et al. | The factors influencing sludge incineration residue (SIR)-based magnesium potassium phosphate cement and the solidification/stabilization characteristics and mechanisms of heavy metals | |
| CN105598146A (en) | Curing agent for restoring soil polluted by chromium and restoration method | |
| CN109719110A (en) | A method of processing incineration of refuse flyash | |
| CN101474468A (en) | Method for treating burning flyash using chelant | |
| JP2014054602A (en) | Insolubilizer of harmful matter and insolubilization treatment method of harmful matter | |
| CN102936116A (en) | Method for solidifying-stabilizing bottom mud polluted by heavy metals by using cement and organic sulfides and application of obtained solidified body | |
| CN102718378A (en) | Method of cement kiln co-processing for calcium-added and passivated town sludge | |
| CN105967470A (en) | Cadmium copper lead polluted bottom mud curing agent and curing method thereof | |
| CN102773245B (en) | Medicament stabilizing method of fly ashes in incineration of medical wastes | |
| CN102974068A (en) | Waste incineration fly ash treatment agent | |
| CN108929091A (en) | A kind of safety hardener and its synthetic method of incineration of refuse flyash |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121107 Termination date: 20151112 |
|
| EXPY | Termination of patent right or utility model |