CN105063359A - Method for separating and recovering heavy metal in waste incineration fly ash - Google Patents
Method for separating and recovering heavy metal in waste incineration fly ash Download PDFInfo
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- CN105063359A CN105063359A CN201510426190.8A CN201510426190A CN105063359A CN 105063359 A CN105063359 A CN 105063359A CN 201510426190 A CN201510426190 A CN 201510426190A CN 105063359 A CN105063359 A CN 105063359A
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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 method for separating and recovering heavy metal in waste incineration fly ash and belongs to the field of environmental protection. The method for separating and recovering the heavy metal in the waste incineration fly ash comprises the steps that firstly, the fly ash is filtered by adding water into the fly ash; then a complexing agent is added into the fly ash for a reaction, so that a complex is obtained; and the complex is introduced into a metal zinc sheet water channel, so that metal replacement is achieved, and the heavy metal is extracted. The method for separating and recovering the heavy metal in the waste incineration fly ash has the beneficial effects that the treatment effect is good, the heavy metal can be fully recovered, waste of resources is avoided, secondary pollution is avoided, operation is easy, and required cost is low.
Description
Technical field
The present invention relates to the method for heavy metal in a kind of Separation and Recovery incineration of refuse flyash, belong to field of environment protection.
Background technology
The base conditioning mode of domestic waste has landfill, burning and compost.Wherein to have floor space little for burning disposal, and the treatment time is short, minimizing is remarkable, can kill all pathogenic micro-organisms and parasitic ovum, the heat energy of the generation in recoverable burning process thus be conducive to the advantages such as the resource utilization of municipal wastes.Very high at the ratio row of the mode of developed country's burning disposal.The treatment of urban garbage of China is still based on landfill, but landfill and compost treatment need to take a large amount of soils, along with the sharply increase of quantity of refuse, in the big or middle city of China that land resources is in short supply, the addressing in landfill place is day by day difficult, therefore, incineration treatment of garbage technology has become the preferred version of China's domestic rubbish disposal, in recent years, burning ratio increased increasingly, had become the main processing ways of China's domestic waste.
The advantage certain though burn away the refuse, unavoidably, existing defects.Dioxins a large amount of in Refuse Incineration Process and heavy metal can enrichments in flying dust, containing a large amount of toxic heavy metals (Cr, Pb, Cu etc.) in flying dust, belong to the Hazardous wastes of national regulation, therefore must process heavy metal wherein.The method of current process heavy metal has soda acid to extract, the methods such as biological lixiviate, wherein acid extraction, the part metals in flying dust can be proposed thus make flying dust enter common landfill yard or recycle as buildings and resources.Different flying dusts is due to differences such as domestic refuse composition burning conditions, in flying dust, the existence form of heavy metal and content have very big-difference, therefore, even if under same treatment condition, treatment effect can be very different, and sometimes treatment effect is not good, utilize acid simultaneously, also will carry out secondary treatment to the acid of process heavy metal, a large amount of acid is wasted in this process, pollutes the environment.
Summary of the invention
The technical problem that the present invention mainly solves: reclaim heavy metal poor effect for adopting acid extraction process at present, waste a large amount of acid, contaminate environment, also need to carry out subsequent disposal to acid simultaneously, the drawback of operation steps complexity, provide the method for heavy metal in a kind of Separation and Recovery incineration of refuse flyash, the method first to add water filtration treatment to flying dust, add complexing agent reaction again, produce complex compound, passed into metal zinc metal sheet and crossed aquaporin, reach metal replacement, extract heavy metal, the method can process recovery heavy metal, pollution-free, Dioxins is also by filtering layer by layer simultaneously, processed.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is, its concrete steps are:
(1) dig a long 15m, wide 10m, the treating pond A of high 5m, then dig an equal treating pond B, the gradient for the treatment of pond A is higher than treating pond B, and the gradient is 15 ° ~ 20 °, connects one and cross aquaporins in the middle of two ponds, for subsequent use;
(2) one deck trunk is built as support at distance treating pond A bottom 3 ~ 4m place, transversely arranged, spread the activated carbon fiber net into 1 ~ 2 layer above it, activated carbon fiber spread on the net thick be 5 ~ 8cm carbonization hair grass, hair grass re-lays the activated carbon fiber net of 3 ~ 4 layers, the aperture of described activated carbon fiber net is 2 ~ 3mm;
(3) then spread the flying dust of waste incineration in the activated carbon fiber of the superiors on the net, cover to higher than flying dust 0.3 ~ 0.5m with water, soak 2 ~ 3h, to final in suspension;
(4) add the mixed solution of the deionized water being 40 ~ 60 ﹪ methyl ethyl diketones and 30 ~ 50 ﹪ benzoyl acetones and 10% by mass percentage more wherein, soak 5 ~ 7 days;
(5) after soaking, the water containing heavy metal processed is passed into treating pond B through aquaporin, described aquaporin of crossing is made up of zinc, long 3 ~ 4m, diameter 25 ~ 30cm, wherein crosses in aquaporin and is provided with the screen cloth with zinc metal sheet every 50cm place, mesh size 2 ~ 3mm.
(6) sample, the heavy metal content in the B of check processing pond, if heavy metal content concentration is up to standard lower than 1.0mg/L in water, then discharges, if higher than 1.0mg/L, then and circular treatment again again.
The invention has the beneficial effects as follows:
(1) treatment effect is good, heavy metal can be able to abundant recovery, can not waste resource;
(2) secondary pollution can not be produced;
(3) simple to operate, required cost is low.
Embodiment
First dig a long 15m, wide 10m, the treating pond A of high 5m, then dig an equal treating pond B, the gradient for the treatment of pond A is higher than treating pond B, and the gradient is 15 ° ~ 20 °, connects one and cross aquaporins in the middle of two ponds, for subsequent use;
In distance, one deck trunk is built as support by treating pond A bottom 3 ~ 4m place, transversely arranged, spread the activated carbon fiber net into 1 ~ 2 layer above it, activated carbon fiber spread on the net thick be 5 ~ 8cm carbonization hair grass, hair grass re-lays the activated carbon fiber net of 3 ~ 4 layers, wherein the aperture of activated carbon fiber net is 2 ~ 3mm; Then spread the flying dust of waste incineration in the activated carbon fiber of the superiors on the net, cover to higher than flying dust 0.3 ~ 0.5m with water, soak 2 ~ 3h, to final in suspension; Add the mixed solution of the deionized water being 40 ~ 60 ﹪ methyl ethyl diketones and 30 ~ 50 ﹪ benzoyl acetones and 10% by mass percentage more wherein, soak 5 ~ 7 days; After soaking, the water containing heavy metal processed is passed into treating pond B through aquaporin, crosses aquaporin and be made up of zinc, long 3 ~ 4m, diameter 25 ~ 30cm, wherein cross in aquaporin and be provided with the screen cloth with zinc metal sheet every 50cm place, mesh size 2 ~ 3mm.Final sampling, the heavy metal content in the B of check processing pond, if heavy metal content concentration is up to standard lower than 1.0mg/L in water, then discharges, if higher than 1.0mg/L, then circular treatment again again.
First dig a long 15m, wide 10m, the treating pond A of high 5m, then dig an equal treating pond B, the gradient for the treatment of pond A is higher than treating pond B, and the gradient is 15 °, connects one and cross aquaporins in the middle of two ponds, for subsequent use; In distance, one deck trunk is built as support by treating pond A bottom 4m place, transversely arranged, spread the activated carbon fiber net into 2 layers above it, the thick hair for 8cm carbonization grass is spread on the net in activated carbon fiber, hair grass re-lays the activated carbon fiber net of 3 layers, wherein the aperture of activated carbon fiber net is 2mm; Then spread the flying dust of waste incineration in the activated carbon fiber of the superiors on the net, cover to higher than flying dust 0.5m with water, soak 3h, to final in suspension; Add the mixed solution of the deionized water being 40 ﹪ methyl ethyl diketones and 50 ﹪ benzoyl acetones and 10% by mass percentage more wherein, soak 7 days; After soaking, the water containing heavy metal processed is passed into treating pond B through aquaporin, crosses aquaporin and be made up of zinc, long 4m, diameter 30cm, wherein cross in aquaporin and be provided with the screen cloth with zinc metal sheet every 50cm place, mesh size 3mm.The water finally getting 1L in treating pond B detects, and after testing, in water, heavy metal content concentration 0.8mg/L is up to standard, can discharge.
First dig a long 15m, wide 10m, the treating pond A of high 5m, then dig an equal treating pond B, the gradient for the treatment of pond A is higher than treating pond B, and the gradient is 17 °, connects one and cross aquaporins in the middle of two ponds, for subsequent use; In distance, one deck trunk is built as support by treating pond A bottom 4m place, transversely arranged, spread the activated carbon fiber net into 2 layers above it, the thick hair for 5cm carbonization grass is spread on the net in activated carbon fiber, hair grass re-lays the activated carbon fiber net of 4 layers, wherein the aperture of activated carbon fiber net is 3mm; Then spread the flying dust of waste incineration in the activated carbon fiber of the superiors on the net, cover to higher than flying dust 0.5m with water, soak 2h, to final in suspension; Add the mixed solution of the deionized water being 60 ﹪ methyl ethyl diketones and 30 ﹪ benzoyl acetones and 10% by mass percentage more wherein, soak 5 days; After soaking, the water containing heavy metal processed is passed into treating pond B through aquaporin, crosses aquaporin and be made up of zinc, long 4m, diameter 25cm, wherein cross in aquaporin and be provided with the screen cloth with zinc metal sheet every 50cm place, mesh size 2.5mm.The water finally getting 1L in treating pond B detects, and after testing, in water, heavy metal content concentration 0.9mg/L is up to standard, can discharge.
First dig a long 15m, wide 10m, the treating pond A of high 5m, then dig an equal treating pond B, the gradient for the treatment of pond A is higher than treating pond B, and the gradient is 15 °, connects one and cross aquaporins in the middle of two ponds, for subsequent use; In distance, one deck trunk is built as support by treating pond A bottom 3m place, transversely arranged, spread the activated carbon fiber net into 1 layer above it, the thick hair for 5cm carbonization grass is spread on the net in activated carbon fiber, hair grass re-lays the activated carbon fiber net of 4 layers, wherein the aperture of activated carbon fiber net is 2mm; Then spread the flying dust of waste incineration in the activated carbon fiber of the superiors on the net, cover to higher than flying dust 0.5m with water, soak 3h, to final in suspension; Add the mixed solution of the deionized water being 45 ﹪ methyl ethyl diketones and 45 ﹪ benzoyl acetones and 10% by mass percentage more wherein, soak 6 days; After soaking, the water containing heavy metal processed is passed into treating pond B through aquaporin, crosses aquaporin and be made up of zinc, long 3m, diameter 26cm, wherein cross in aquaporin and be provided with the screen cloth with zinc metal sheet every 50cm place, mesh size 3mm.The water finally getting 1L in treating pond B detects, and after testing, in water, heavy metal content concentration 0.9mg/L is up to standard, can discharge.
Claims (1)
1. the method for heavy metal in Separation and Recovery incineration of refuse flyash, is characterized in that concrete operation step is:
(1) dig a long 15m, wide 10m, the treating pond A of high 5m, then dig an equal treating pond B, the gradient for the treatment of pond A is higher than treating pond B, and the gradient is 15 ° ~ 20 °, connects one and cross aquaporins in the middle of two ponds, for subsequent use;
(2) one deck trunk is built as support at distance treating pond A bottom 3 ~ 4m place, transversely arranged, spread the activated carbon fiber net into 1 ~ 2 layer above it, activated carbon fiber spread on the net thick be 5 ~ 8cm carbonization hair grass, hair grass re-lays the activated carbon fiber net of 3 ~ 4 layers, the aperture of described activated carbon fiber net is 2 ~ 3mm;
(3) then spread the flying dust of waste incineration in the activated carbon fiber of the superiors on the net, cover to higher than flying dust 0.3 ~ 0.5m with water, soak 2 ~ 3h, to final in suspension;
(4) add the mixed solution of the deionized water being 40 ~ 60 ﹪ methyl ethyl diketones and 30 ~ 50 ﹪ benzoyl acetones and 10% by mass percentage more wherein, soak 5 ~ 7 days;
(5) after soaking, the water containing heavy metal processed is passed into treating pond B through aquaporin, described aquaporin of crossing is made up of zinc, long 3 ~ 4m, diameter 25 ~ 30cm, wherein crosses in aquaporin and is provided with the screen cloth with zinc metal sheet every 50cm place, mesh size 2 ~ 3mm;
(6) sample, the heavy metal content in the B of check processing pond, if heavy metal content concentration is up to standard lower than 1.0mg/L in water, then discharges, if higher than 1.0mg/L, then and circular treatment again again.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510426190.8A CN105063359A (en) | 2015-07-20 | 2015-07-20 | Method for separating and recovering heavy metal in waste incineration fly ash |
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| CN201510426190.8A CN105063359A (en) | 2015-07-20 | 2015-07-20 | Method for separating and recovering heavy metal in waste incineration fly ash |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110607454A (en) * | 2019-09-29 | 2019-12-24 | 新中天环保股份有限公司 | Method for extracting heavy metal from secondary fly ash generated in waste incineration |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101474468A (en) * | 2008-01-03 | 2009-07-08 | 上海日技环境技术咨询有限公司 | Method for treating burning flyash using chelant |
| CN102874946A (en) * | 2012-09-13 | 2013-01-16 | 上海大学 | Synergistic process method for fly ash and percolate |
| CN104548924A (en) * | 2014-12-22 | 2015-04-29 | 武汉大学 | System for comprehensively controlling heavy metal pollutants in flue gas of coal-fired power plant |
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2015
- 2015-07-20 CN CN201510426190.8A patent/CN105063359A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101474468A (en) * | 2008-01-03 | 2009-07-08 | 上海日技环境技术咨询有限公司 | Method for treating burning flyash using chelant |
| CN102874946A (en) * | 2012-09-13 | 2013-01-16 | 上海大学 | Synergistic process method for fly ash and percolate |
| CN104548924A (en) * | 2014-12-22 | 2015-04-29 | 武汉大学 | System for comprehensively controlling heavy metal pollutants in flue gas of coal-fired power plant |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110607454A (en) * | 2019-09-29 | 2019-12-24 | 新中天环保股份有限公司 | Method for extracting heavy metal from secondary fly ash generated in waste incineration |
| CN110607454B (en) * | 2019-09-29 | 2021-03-23 | 新中天环保股份有限公司 | Method for extracting heavy metal from secondary fly ash generated in waste incineration |
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Application publication date: 20151118 |