CN103170488A - Waste incineration fly ash curing agent and treatment method of waste incineration fly ash - Google Patents
Waste incineration fly ash curing agent and treatment method of waste incineration fly ash Download PDFInfo
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- CN103170488A CN103170488A CN2013100499443A CN201310049944A CN103170488A CN 103170488 A CN103170488 A CN 103170488A CN 2013100499443 A CN2013100499443 A CN 2013100499443A CN 201310049944 A CN201310049944 A CN 201310049944A CN 103170488 A CN103170488 A CN 103170488A
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Abstract
The invention provides a waste incineration fly ash curing agent and a treatment method of waste incineration fly ash. The waste incineration fly ash curing agent comprises light calcined magnesia powder. The treatment method of the waste incineration fly ash comprises the following steps of: mixing the waste incineration fly ash to be treated with the waste incineration fly ash curing agent and water to obtain a liquid-solid mixture; and curing the liquid-solid mixture to obtain a cured body. The waste incineration fly ash curing agent can be used for effectively improving the efficiency and the quality of treating the waste incineration fly ash.
Description
Technical field
The present invention relates to the solid waste process field.Particularly, the present invention relates to the processing method of incineration of refuse flyash curing agent and incineration of refuse flyash.
Background technology
Incineration of refuse flyash because enrichment the toxic heavy metal material of higher concentration, belong to the danger wastes of national regulation, must be through overstabilization/curings processing before entering landfill yard.The solidification processing method of incineration of refuse flyash mainly contains cement solidification, medicament curing, melting and solidification etc. both at home and abroad at present, wherein uses more generally cement solidification and medicament and solidifies.
Required equipment, the operation requirements of cement solidification is simple, but after cement solidification, increase-volume is than large, and the cement consumption is high, and a large amount of uses of cement mean direct resource consumption and indirectly environmental pollution; Chemical agent generally is divided into Inorganic chemicals and organic chemistry medicament, and Inorganic chemicals is mainly Na
2S, phosphate and ferrite medicament, organic chemistry medicament are mainly take organic sequestering agent as main.The chemical agent stabilization technique holds greatly because it subtracts, treatment effect has well good development prospect, but when adopting Inorganic chemicals to solidify, also can produce pernicious gas when pH value is low, the inorganic salts waste water that produces simultaneously high concentration need be done further processing, increases cost of disposal.Although the treatment effect of organic sequestering agent is stable, the cost of organic sequestering agent is high, limit value its use.
In view of the deficiencies in the prior art, so the processing method of incineration of refuse flyash is in the urgent need to improving.
Summary of the invention
The present invention is intended to one of solve the problems of the technologies described above at least to a certain extent.For this reason, one object of the present invention is to propose that a kind of curing technology is simple, solidification effect good, economy is reasonable and the incineration of refuse flyash curing agent of environmental protection and the processing method of incineration of refuse flyash.
In one aspect of the invention, the present invention proposes a kind of incineration of refuse flyash curing agent.According to embodiments of the invention, this curing agent comprises light-magnesite powder.Thus, utilize light-magnesite powder effectively to be cured incineration of refuse flyash, and mix can reach on a small quantity effectively solidify, processing cost is low, increase-volume than little, solidification effect is desirable and can not produce secondary pollution, therefore light-magnesite powder is a kind of eco-friendly curing agent, can effectively improve efficient and the quality of disposal of refuse flying ash.
In addition, incineration of refuse flyash curing agent according to the above embodiment of the present invention can also have following additional technical characterictic:
According to embodiments of the invention, in described light-magnesite powder, the active oxidation content of magnesium is 30 ~ 80 % by weight.Thus, can further improve the efficient of utilizing light-magnesite powder disposal of refuse flying ash.
According to embodiments of the invention, the particle mean size of described light-magnesite powder is 180 orders.Thus, can further improve the efficient of utilizing light-magnesite powder disposal of refuse flying ash.
According to a further aspect of the present invention, the present invention proposes a kind of processing method of incineration of refuse flyash.According to embodiments of the invention, this processing method comprises: pending incineration of refuse flyash is mixed with the described incineration of refuse flyash curing agent of above embodiment and water, in order to obtain liquid-solid mixture; Described liquid-solid mixture is cured, in order to obtain firming body.Thus, utilize the method effectively to process incineration of refuse flyash, the party is simple, convenient operation, and has namely avoided secondary pollution without the generation of waste gas waste water in solidification process.
In addition, the processing method of incineration of refuse flyash according to the above embodiment of the present invention can also have following additional technical characterictic:
According to embodiments of the invention, the mass ratio of described incineration of refuse flyash and curing agent is 1:0.176 ~ 0.667.Thus, can be when taking full advantage of curing agent disposal of refuse flying ash effectively, further improve the efficient of disposal of refuse flying ash.
According to embodiments of the invention, the quality of described water is 30 ~ 55% of incineration of refuse flyash and curing agent gross mass.Thus, incineration of refuse flyash and curing agent can be mixed, in order to further improve the efficient of disposal of refuse flying ash.
According to embodiments of the invention, described curing is by completed described liquid-solid mixture at room temperature standing 3 days at least.Thus, can be so that liquid-solid mixture be effectively solidified, in order to further improve the efficient of disposal of refuse flying ash.
According to embodiments of the invention, described curing is by completing described liquid-solid mixture at room temperature standing 7 ~ 10 days.Thus, can be so that liquid-solid mixture be effectively solidified, in order to further improve the efficient of disposal of refuse flying ash.
According to embodiments of the invention, further comprise described firming body is carried out landfill.Thus, can complete the further processing to incineration of refuse flyash, improve the quality of disposal of refuse flying ash.
Additional aspect of the present invention and advantage part in the following description provide, and part will become obviously from the following description, or recognize by practice of the present invention.
The specific embodiment
The below describes embodiments of the invention in detail, and wherein same or similar label represents same or similar element or the element with identical or similar functions from start to finish.The following examples are exemplary, only are used for explaining the present invention, and can not be interpreted as limitation of the present invention.
In one aspect of the invention, the present invention proposes a kind of incineration of refuse flyash curing agent.According to embodiments of the invention, this curing agent comprises light-magnesite powder.Utilize thus this curing agent effectively to be used for the processing of incineration of refuse flyash, can improve the efficient of disposal of refuse flying ash.
According to some embodiments of the present invention, " light-magnesite powder " is called for short light-burning magnesium powder, be a kind of magnesium hydroxide by extracting in magnesite, shepardite, seawater or bittern through 800 ~ 1000 ℃ of calcining activated magnesias that obtain, light-burning magnesium powder is for being faint yellow, hazel powder.Usually light-magnesite powder is used to the fields such as iron and steel production, building, building materials, also can be applicable in power plant, chemical industry, medicine, national defense industry simultaneously.
According to embodiments of the invention, the inventor is through bold trial and the ground discovery of some experiment accidents, light-magnesite powder be used for is solidified the incineration of refuse flyash effect unexpected, and find to can be used for the active quantities of the light-magnesite powder that incineration of refuse flyash solidifies and be not particularly limited through further research.According to embodiments of the invention, in light-magnesite powder, the active oxidation content of magnesium refers to the content of the efficient oxidation magnesium in light calcined magnesia, can measure according to hydration method in YBT 4019-2006.
According to a particular embodiment of the invention, in the curing agent light calcined magnesia, the active oxidation content of magnesium is not particularly limited, and for example according to some embodiments of the present invention, in the curing agent light calcined magnesia, the active oxidation content of magnesium is 30 ~ 80 % by weight.Can further improve efficient and the quality of disposal of refuse flying ash thus.
According to a particular embodiment of the invention, the particle mean size of light calcined magnesia also is not particularly limited, and for example according to a particular embodiment of the invention, the particle mean size of light calcined magnesia is 180 orders.Thus, can further improve efficient and the quality of disposal of refuse flying ash.
According to the abovementioned embodiments of the present invention, utilize light-magnesite powder effectively to be cured incineration of refuse flyash, and mix can reach on a small quantity effectively and solidify, processing cost is low, increase-volume than little, solidification effect is desirable and can not produce secondary pollution.Therefore, light-magnesite powder is a kind of environmental protection, energy-conservation curing agent, utilizes this curing agent can further improve efficient and the quality of disposal of refuse flying ash.
In another aspect of the present invention, the present invention proposes a kind of processing method of incineration of refuse flyash.According to embodiments of the invention, the method comprises: pending incineration of refuse flyash is mixed with incineration of refuse flyash curing agent and the water of the above embodiment of the present invention, obtain liquid-solid mixture; Then liquid-solid mixture is cured, obtains firming body.Thus, utilize the method effectively to process incineration of refuse flyash, the party is simple, convenient operation, and produces without waste gas waste water in solidification process, has avoided secondary pollution.
According to embodiments of the invention, the mass ratio of incineration of refuse flyash and curing agent is not specially limited, and can determine concrete mass ratio as the activity of the light-magnesite powder of curing agent according to selection.For example according to a particular embodiment of the invention, the mass ratio of incineration of refuse flyash and curing agent can be 1:0.176 ~ 0.667.Thus, can be when improving the utilization rate of curing agent disposal of refuse flying ash effectively, further improve the efficient of disposal of refuse flying ash.
According to other embodiment of the present invention, with incineration of refuse flyash and curing agent according to certain mass than after mixing, then add suitable quantity of water to stir, obtain liquid-solid mixture.According to a specific embodiment of the present invention, the water that can add is running water.According to embodiments of the invention, add the quality of entry and be not particularly limited, for example according to concrete examples more of the present invention, the quality that adds entry can be 30 ~ 55% of incineration of refuse flyash and curing agent gross mass.Thus, incineration of refuse flyash and curing agent can be mixed and obtain liquid-solid mixture, and can additionally not produce waste water, can further improve the efficient of disposal of refuse flying ash.
According to some embodiment more of the present invention, above-mentioned liquid-solid mixture is cured obtains firming body, particularly, curing can be by completing liquid-solid mixture at room temperature standing 3 days at least.Thus, can be so that liquid-solid mixture be effectively solidified, in order to further improve the efficient of disposal of refuse flying ash.According to a particular embodiment of the invention, more preferably, curing can be by completing liquid-solid mixture at room temperature standing 7 ~ 10 days.Thus, can be so that liquid-solid mixture be effectively solidified, in order to further improve the efficient of disposal of refuse flying ash.The present inventor finds under study for action, because the light calcined magnesia quality is crisp, is loose structure, and reactivity is very large, with the water effect after cementitiousness is arranged, generate Mg (OH) after standing a period of time
2And harden, incineration of refuse flyash can be wrapped up thus curing, and the increase-volume of firming body is smaller, can reduce thus further the workload to the firming body landfill.The method of utilizing disposal of refuse flying ash of the present invention is the disposal of refuse flying ash effectively, especially the toxic heavy metal materials such as Pb, the Zn of the higher concentration in incineration of refuse flyash, Cd can be cured, more than its curing degree all can reach 98 % by weight, its firming body can satisfy the index of carrying out landfill at household refuse landfill sites.Utilize thus the method can solve in simple cement solidification method increase-volume than large problem, solved again heavy metal chelant and solidified the high in cost of production problem.Therefore, processing method of the present invention not only can improve the efficient of disposal of refuse flying ash, and energy-conserving and environment-protective, cost are low.
Below by specific embodiment, the present invention will be described, need to prove that these embodiment are only for illustration purpose, and can not be construed to by any way limitation of the present invention.In addition, if not otherwise specified, the equipment that adopts and material are commercially available in the following example.
Embodiment 1
Raw material: pending incineration of refuse flyash, in flying dust, the leaching concentration of Pb ion is 20.71mg/L; The leaching concentration of Zn ion is 149.2mg/L; Curing agent is 85 powder light-magnesite powder, and the active oxidation content of magnesium is 68.9%, and granularity is 180 orders.
Processing method: with pending incineration of refuse flyash with light-magnesite powder in mass ratio for 4:1 mixes, after mixing, be 0.43 to add entry according to liquid-solid ratio, use the agitator uniform mixing, then with the mixture moulding, obtained firming body under room temperature in standing 7 days.Firming body is carried out intensity test; Adopt solid waste Leaching leaching method-hac buffer method (HJ/T300-2007) to carry out the determination of extractives experiment to firming body.
Measurement result: firming body compression strength is 0.30MPa;
The leaching concentration of Pb ion is 0.25mg/L;
The leaching concentration of Zn ion is 0.073mg/L.
Conclusion: the leaching concentration of Pb ion maintains an equal level mutually with the standard of household refuse landfill sites 0.25mg/L, the curing degree of Pb ion can reach more than 98%, the leaching concentration of Zn ion is well below the limit value 100mg/L of standard of landfill, curing degree can reach more than 99.9%, can carry out landfill at household refuse landfill sites.
Embodiment 2
Raw material: pending incineration of refuse flyash, in flying dust, the leaching concentration of Pb ion is 2.68mg/L; The leaching concentration of Cd ion is 0.54mg/L; Curing agent is 85 powder light-magnesite powder, and granularity is 180 orders, and the active oxidation content of magnesium is 32.2%.
Processing method: with pending incineration of refuse flyash with light-magnesite powder in mass ratio for 3:2 mixes, after mixing, be 0.30 to add entry according to liquid-solid ratio, use the agitator uniform mixing, then with the mixture moulding, obtained firming body under room temperature in standing 7 days.Firming body is carried out intensity test; Adopt solid waste Leaching leaching method-hac buffer method (HJ/T300-2007) to carry out the determination of extractives experiment to firming body.
Measurement result: firming body compression strength is 0.5MPa;
The leaching concentration of Pb ion is 0.21mg/L;
The leaching concentration of Cd ion is 0.07mg/L.
The leaching concentration of conclusion: Pb, Cd ion is respectively 0.21mg/L, 0.07mg/L, and all lower than the standard of landfill of household refuse landfill sites, this firming body can carry out landfill at household refuse landfill sites.
(annotate: press the height of content of magnesia, light-magnesite powder can be divided into different credit ratings, comprises 65 powder, 70 powder, 75 powder, 80 powder, 85 powder, 90 powder etc.）
In the description of this specification, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or example in conjunction with specific features, structure, material or the characteristics of this embodiment or example description.In this manual, the schematic statement of above-mentioned term not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or characteristics can be with suitable mode combinations in any one or more embodiment or example.
Although the above has illustrated and has described embodiments of the invention, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, those of ordinary skill in the art is not in the situation that break away from principle of the present invention and aim can change above-described embodiment within the scope of the invention, modification, replacement and modification.
Claims (9)
1. an incineration of refuse flyash curing agent, is characterized in that, comprises light-magnesite powder.
2. incineration of refuse flyash curing agent according to claim 1, is characterized in that, in described light-magnesite powder, the active oxidation content of magnesium is 30 ~ 80 % by weight.
3. incineration of refuse flyash curing agent according to claim 1, is characterized in that, the particle mean size of described light-magnesite powder is 180 orders.
4. the processing method of an incineration of refuse flyash, is characterized in that, comprising:
The described incineration of refuse flyash curing agent of pending incineration of refuse flyash and claim 1 or 2 and water are mixed, in order to obtain liquid-solid mixture;
Described liquid-solid mixture is cured, in order to obtain firming body.
5. processing method according to claim 4, is characterized in that, the mass ratio of described incineration of refuse flyash and curing agent is 1:0.176 ~ 0.667.
6. processing method according to claim 4, is characterized in that, the quality of described water is 30 ~ 55% of incineration of refuse flyash and curing agent gross mass.
7. processing method according to claim 4, is characterized in that, described curing is by completed described liquid-solid mixture at room temperature standing 3 days at least.
8. processing method according to claim 7, is characterized in that, described curing is by completing described liquid-solid mixture at room temperature standing 7 ~ 10 days.
9. processing method according to claim 4, is characterized in that, further comprises described firming body is carried out landfill.
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Cited By (9)
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| CN104773989A (en) * | 2015-03-29 | 2015-07-15 | 安徽盛运环保（集团）股份有限公司 | High efficiency waste incineration fly ash solidifying agent |
| CN105299657A (en) * | 2015-11-03 | 2016-02-03 | 华中科技大学 | Co-processing method for red mud and household garbage incineration fly ash |
| CN107050734A (en) * | 2017-05-31 | 2017-08-18 | 哈德逊（苏州）水技术有限公司 | A kind of incineration of refuse flyash curing agent |
| CN108117351A (en) * | 2017-12-28 | 2018-06-05 | 大连理工大学 | One kind is based on MgO-SiO2-H2The fly ash from burning city domestic garbage curing materials and preparation method of O gelling systems |
| CN108929091A (en) * | 2018-08-21 | 2018-12-04 | 湖北大学 | A kind of safety hardener and its synthetic method of incineration of refuse flyash |
| CN110328221A (en) * | 2019-08-19 | 2019-10-15 | 王玉海 | A kind of incineration of refuse flyash mineralization treatment method |
| CN111410460A (en) * | 2019-12-17 | 2020-07-14 | 李韦皞 | Method for immobilizing heavy metals and chloride in incineration fly ash of hazardous waste |
| CN115466093A (en) * | 2022-10-18 | 2022-12-13 | 江苏科技大学 | Method for carbonizing and curing heavy metal in fly ash based on EDTA (ethylene diamine tetraacetic acid) -calcium-silicon solid waste-light-burned magnesium oxide |
| CN117776652A (en) * | 2024-02-27 | 2024-03-29 | 吉奥固化(上海)新材料有限公司 | Cementing composition and cementing material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104773989A (en) * | 2015-03-29 | 2015-07-15 | 安徽盛运环保（集团）股份有限公司 | High efficiency waste incineration fly ash solidifying agent |
| CN105299657A (en) * | 2015-11-03 | 2016-02-03 | 华中科技大学 | Co-processing method for red mud and household garbage incineration fly ash |
| CN107050734A (en) * | 2017-05-31 | 2017-08-18 | 哈德逊（苏州）水技术有限公司 | A kind of incineration of refuse flyash curing agent |
| CN108117351A (en) * | 2017-12-28 | 2018-06-05 | 大连理工大学 | One kind is based on MgO-SiO2-H2The fly ash from burning city domestic garbage curing materials and preparation method of O gelling systems |
| CN108117351B (en) * | 2017-12-28 | 2019-06-28 | 大连理工大学 | One kind being based on MgO-SiO2-H2The fly ash from burning city domestic garbage curing materials and preparation method of O gelling system |
| CN108929091A (en) * | 2018-08-21 | 2018-12-04 | 湖北大学 | A kind of safety hardener and its synthetic method of incineration of refuse flyash |
| CN110328221A (en) * | 2019-08-19 | 2019-10-15 | 王玉海 | A kind of incineration of refuse flyash mineralization treatment method |
| CN111410460A (en) * | 2019-12-17 | 2020-07-14 | 李韦皞 | Method for immobilizing heavy metals and chloride in incineration fly ash of hazardous waste |
| CN115466093A (en) * | 2022-10-18 | 2022-12-13 | 江苏科技大学 | Method for carbonizing and curing heavy metal in fly ash based on EDTA (ethylene diamine tetraacetic acid) -calcium-silicon solid waste-light-burned magnesium oxide |
| CN115466093B (en) * | 2022-10-18 | 2023-06-16 | 江苏科技大学 | Method for carbonizing and solidifying fly ash heavy metal based on EDTA-calcium siliceous solid waste-light burned magnesia |
| CN117776652A (en) * | 2024-02-27 | 2024-03-29 | 吉奥固化(上海)新材料有限公司 | Cementing composition and cementing material |
| CN117776652B (en) * | 2024-02-27 | 2024-05-28 | 吉奥固化(上海)新材料有限公司 | Cementing composition and cementing material |
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