CN104084027A - Waste incineration fly ash acid pickling method utilizing acid solution of flue tail gas - Google Patents
Waste incineration fly ash acid pickling method utilizing acid solution of flue tail gas Download PDFInfo
- Publication number
- CN104084027A CN104084027A CN201410345043.3A CN201410345043A CN104084027A CN 104084027 A CN104084027 A CN 104084027A CN 201410345043 A CN201410345043 A CN 201410345043A CN 104084027 A CN104084027 A CN 104084027A
- Authority
- CN
- China
- Prior art keywords
- acid
- fly ash
- waste incineration
- incineration
- tail gas
- 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.)
- Pending
Links
Abstract
The invention discloses a waste incineration fly ash acid pickling method utilizing an acid solution of flue tail gas. The waste incineration fly ash acid pickling method utilizing the acid solution of the flue tail gas is characterized in that an acid pickling solution containing HCl and H2SO4 components is formed after the waste incineration flue tail gas is dissolved into water, an acid pickling solution is prepared with the mole concentration ratio of hydrochloric acid to sulfuric acid to sodium chloride of (0.15-0.25) to (0.05-0.07) to (0.03-0.05), and the acid pickling solution is used for extracting heavy metal in the waste incineration fly ash. The particular treatment comprises the following steps of preparing the acid picking solution, washing fly ash and performing acid pickling on the fly ash. Compared with the prior art, the waste incineration fly ash acid pickling method utilizing the acid solution of the flue tail gas, which is provided by the invention, has a good heavy metal removing effect, can recycle the tail gas after waste incineration fully, reduces the harmless treatment cost of the fly ash greatly, has the great significance on environmental protection, and is a waste incineration fly ash harmless treatment technology with a great popularization value.
Description
Technical field
The present invention relates to three industrial wastes processing technology field, especially a kind of incineration of refuse flyash acid washing method that reclaims flue gas acid solution for burning power plant.
Background technology
Along with the high speed development of China's urban economy, municipal refuse output grows with each passing day, and increases every year 8 ~ 10%.The basic handling mode of domestic waste is landfill, burning and compost both at home and abroad, burning method (subtracts quality and generally can reach 70% because its floor space is few, the processing time is short, minimizing is remarkable, subtract volume and can reach 90%), the advantage such as the more thorough and recyclable waste incineration waste heat of harmless treatment, become gradually the trend for the treatment of of urban garbage.Flying ash refers to the incinerating residue obtaining in the collection of garbage burning factory flue gas purification system, accounts for 20% of cinder from refuse incineration total amount.Flying dust, because wherein containing heavy metal, solubility salt and the organic chloride (Polychlorinated biphenyls and bioxin) that Leaching is very high, is generally considered a kind of hazardous waste, very big to environmental threat.The surface of flying ash and inner all enriched heavy metals, wherein maximum with Pb and Zn, leaching concentration is up to 35.84 mg/L and 5.98 mg/L, and directly landfill can severe contamination groundwater quality.
At present, the treatment technology of flying ash mainly contains cement solidification/stabilizing method, melting and solidification method, chemical agent stabilization method, acid solution extraction method, microorganism leaching extraction method etc.Cement solidification/stabilizing method: as flying dust volume after cement solidification increases, increase the cost of disposal of later stage landfill, and in flying dust, be rich in alkaline-earth metal hydrochloride and the sulfate of high concentration, in solidification process, can seriously hinder the hydration of cement, affect cement to heavy metal solidify, cause the leaching concentration of part heavy metal considerably beyond Leaching standard.Melting and solidification method: flying dust decomposes the noxious material such as bioxin by high temperature in melting and solidification process, and energy consumption is very large, and in melting process, the volatility of the element such as Pb, Cd, S and Cl is higher, easily causes secondary pollution.Chemical agent stabilization method: generally adopt sulfide (sodium thiosulfate, vulcanized sodium) and high-molecular chelating agent as stabilizing agent, because chemical agent price is more expensive, disposal cost is high, and its stablizing effect is relevant with contained heavy metal kind in flying dust.Acid solution extraction method: adopt acid solution to isolate the heavy metal in flying dust, and extract the heavy metal composition in leachate by heavy metal precipitation technology, to reach the object that reduces flying dust Leaching and heavy metal recycling, acid solution extraction method, due to low cost, simple to operate, is subject to extensive concern day by day.
Summary of the invention
A kind of incineration of refuse flyash acid washing method that utilizes flue gas acid solution providing for the deficiencies in the prior art is provided, the sour gas of the waste incineration flue gas that its utilization is reclaimed, water-soluble rear formation contains HCl and H
2sO
4the acid solution of component is the pickle that extracts incineration of refuse flyash heavy metal; incineration of refuse flyash is carried out to harmlessness disposing; to reduce its heavy metal toxicity leaching concentration; reach the qualified discharge of incineration of refuse flyash; heavy metal removing successful; the tail gas of waste incineration has not only obtained good utilization; but also reduce the cost of flying dust harmlessness disposing; reduce the discharge of the three wastes; environmental protection is had to very great meaning, is a kind of incineration of refuse flyash innoxious process for treating that has very much promotional value.
The technical scheme that realizes the object of the invention is: a kind of incineration of refuse flyash acid washing method that utilizes flue gas acid solution, is characterized in utilizing the water-soluble rear formation of waste incineration flue gas to contain HCl and H
2sO
4the acid solution of component, carries out harmlessness disposing to incineration of refuse flyash, and to reduce its heavy metal toxicity leaching concentration, specific acid is washed and comprised the following steps:
(1), the preparation of pickle
Water-soluble the flue gas of waste incineration rear formation is contained to HCl and H
2sO
4the acid solution of component, demarcates with the molar concentration rate of 0.15 ~ 0.25:0.05 ~ 0.07:0.03 ~ 0.05 by hydrochloric acid and sulfuric acid and sodium chloride, is mixed with pickle for extracting incineration of refuse flyash heavy metal stand-by.
(2), the washing of flying dust
Incineration of refuse flyash is mixed by 1:10 kg/ L w/v with reverse osmosis water (RO), on constant-temperature table, carry out the washing processing of flying dust, washing temperature is 20 ~ 25 DEG C, the rotating speed of shaking table is 180 rpm, the time of shaking table vibration is 10 ~ 20 min, mixed liquor after vibration is through vacuum filtration, and filter cake is dry rear homogenizing at 105 DEG C of temperature.
(3), the pickling of flying dust
Flying dust after above-mentioned washing is mixed by 1:40 kg/ L w/v with the pickle of preparation, on constant-temperature table, carry out the pickling of flying dust, pickling temperature is 20 ~ 25 DEG C, the rotating speed of shaking table is 180 rpm, the time of shaking table vibration is 2 ~ 4 h, mixed liquor after vibration, through vacuum filtration, reaches the incineration of refuse flyash of discharge standard for heavy metal toxicity leaching concentration after filter cake is dry at 105 DEG C of temperature.
It is effective that the present invention compared with prior art has heavy metal removing; the tail gas of waste incineration can obtain well fully recycling; greatly reduce the harmlessness disposing cost of flying dust; environmental protection is had to very great meaning, is a kind of incineration of refuse flyash harmlessness disposing technology that has very much promotional value.
Detailed description of the invention
The present invention is further elaborated as example for the flying dust of collecting taking certain MSW Incineration Plant flue gas and electrostatic precipitator below:
Embodiment 1
(1), the preparation of pickle
Adopt wet method ELUTION METHOD to reclaim the HCl, the SO that in burning power plant flue gas, exist
2, SO
3deng sour gas, recovery is contained to HCl and H
2sO
4the acid solution of component is demarcated with the molar concentration rate of 0. 20:0.06:0.04 by hydrochloric acid and sulfuric acid and sodium chloride, is mixed with pickle for extracting incineration of refuse flyash heavy metal stand-by;
(2), the washing of flying dust
Incineration of refuse flyash 5 g that get electrostatic precipitator collection mix with 50 mL reverse osmosis waters, on constant-temperature table, carry out the washing processing of flying dust, washing temperature is 25 DEG C, the rotating speed of shaking table is 180 rpm, the time of shaking table vibration is 10 min, mixed liquor after vibration is through 0.45 μ m composite fibre filter membrane vacuum filtration, and filter cake is dry, homogenizing at 105 DEG C of temperature.
(3), the pickling of flying dust
Flying dust 15 g that get after above-mentioned washing mix with pickle 600 mL of preparation, on constant-temperature table, carry out the pickling of flying dust, pickling temperature is 25 DEG C, the rotating speed of shaking table is 180 rpm, the time of shaking table vibration is 3 h, mixed liquor after vibration, through 0.45 μ m composite fibre filter membrane vacuum filtration, is the incineration of refuse flyash of qualified discharge after filter cake is dry at 105 DEG C of temperature.
The incineration of refuse flyash before and after processing carries out the experiment of toxicity leaching to the present invention to adopt " HJ/T 300-2007 solid waste Leaching hac buffer method ", and use ICP-MS icp ms (Agilent 7700X, the U.S.) leachate is carried out to the mensuration of heavy metal concentration, measurement result is as shown in table 1 below.
Table 1: ash sample toxicity leaching concentration contrast before and after pickling
Cr, Cu, Zn, As, Cd and the Pb six heavy metal species Leachings that can find out flying dust after pickling by table 1 all lower than " household refuse landfill sites pollutes control criterion (GB 16889-2008)) in associated danger refuse criteria limit.
The present invention utilizes the flue gas of burning power plant to form to contain HCl and H
2sO
4the acid solution of component, the eluent extracting as fly-ash heavy metal carries out pickling to incineration of refuse flyash, the heavy metal removing successful of incineration of refuse flyash, after pickling, flying dust Leaching, lower than hazardous waste standard limited value, can be used as household waste and disposes.The pickle of disposing due to flying dust is to utilize to reclaim the preparation of garbage incinerating tail gas sour gas, so greatly reduce the processing cost of flying dust and tail gas in the Leaching that reduces flying dust.
Just the present invention will be further described for each embodiment above, and not in order to limit patent of the present invention, all is that equivalence of the present invention is implemented, within all should being contained in the claim scope of patent of the present invention.
Claims (1)
1. utilize an incineration of refuse flyash acid washing method for flue gas acid solution, it is characterized in that utilizing the water-soluble rear formation of waste incineration flue gas to contain HCl and H
2sO
4the acid solution of component, carries out harmlessness disposing to incineration of refuse flyash, and to reduce its heavy metal toxicity leaching concentration, specific acid is washed and comprised the following steps:
(1), the preparation of pickle
Water-soluble the flue gas of waste incineration rear formation is contained to HCl and H
2sO
4the acid solution of component, demarcates with 0.15 ~ 0.25:0.05 ~ 0.07:0.03 ~ 0.05 molar concentration rate by hydrochloric acid and sulfuric acid and sodium chloride, is mixed with pickle for extracting incineration of refuse flyash heavy metal stand-by;
(2), the washing of flying dust
Incineration of refuse flyash is mixed by 1:10 kg/ L w/v with reverse osmosis water (RO), on constant-temperature table, carry out the washing processing of flying dust, washing temperature is 20 ~ 25 DEG C, the rotating speed of shaking table is 180 rpm, the time of shaking table vibration is 10 ~ 20 min, mixed liquor after vibration is through vacuum filtration, and filter cake is dry rear homogenizing at 105 DEG C of temperature;
(3), the pickling of flying dust
Flying dust after above-mentioned washing is mixed by 1:40 kg/ L w/v with the pickle of preparation, on constant-temperature table, carry out the pickling of flying dust, pickling temperature is 20 ~ 25 DEG C, the rotating speed of shaking table is 180 rpm, the time of shaking table vibration is 2 ~ 4 h, mixed liquor after vibration, through vacuum filtration, reaches the incineration of refuse flyash of discharge standard for heavy metal toxicity leaching concentration after filter cake is dry at 105 DEG C of temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410345043.3A CN104084027A (en) | 2014-07-21 | 2014-07-21 | Waste incineration fly ash acid pickling method utilizing acid solution of flue tail gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410345043.3A CN104084027A (en) | 2014-07-21 | 2014-07-21 | Waste incineration fly ash acid pickling method utilizing acid solution of flue tail gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104084027A true CN104084027A (en) | 2014-10-08 |
Family
ID=51631845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410345043.3A Pending CN104084027A (en) | 2014-07-21 | 2014-07-21 | Waste incineration fly ash acid pickling method utilizing acid solution of flue tail gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104084027A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106282585A (en) * | 2016-09-27 | 2017-01-04 | 中国科学院城市环境研究所 | The detoxification classification resource utilization method of one way of life incineration of refuse flyash |
| CN108179277A (en) * | 2017-12-21 | 2018-06-19 | 深圳清华大学研究院 | Flyash treatment method with high salt, content of beary metal is high |
| CN108480360A (en) * | 2018-03-04 | 2018-09-04 | 天津壹鸣环境科技股份有限公司 | Novel method for recycling fly ash resources and discharging tail gas in ultra-clean mode by adopting rotary kiln melting method |
| CN110639935A (en) * | 2019-09-29 | 2020-01-03 | 新中天环保股份有限公司 | Waste incineration fly ash treatment method |
| CN111408602A (en) * | 2020-01-16 | 2020-07-14 | 李晓清 | Harmless recycling treatment method for waste incineration fly ash |
| CN112090018A (en) * | 2020-08-27 | 2020-12-18 | 北京金隅琉水环保科技有限公司 | Process for treating fly ash by using purified waste acid |
| CN113000014A (en) * | 2021-03-02 | 2021-06-22 | 常熟理工学院 | Method for preparing efficient phosphorus removal agent by utilizing waste incineration fly ash and product thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201701866U (en) * | 2010-05-12 | 2011-01-12 | 创冠环保(中国)有限公司 | Garbage incineration flue gas purification system |
| CN103846267A (en) * | 2012-11-28 | 2014-06-11 | 大连东泰产业废弃物处理有限公司 | Method for processing fly ash from burning of garbage |
-
2014
- 2014-07-21 CN CN201410345043.3A patent/CN104084027A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201701866U (en) * | 2010-05-12 | 2011-01-12 | 创冠环保(中国)有限公司 | Garbage incineration flue gas purification system |
| CN103846267A (en) * | 2012-11-28 | 2014-06-11 | 大连东泰产业废弃物处理有限公司 | Method for processing fly ash from burning of garbage |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106282585A (en) * | 2016-09-27 | 2017-01-04 | 中国科学院城市环境研究所 | The detoxification classification resource utilization method of one way of life incineration of refuse flyash |
| CN106282585B (en) * | 2016-09-27 | 2018-06-26 | 中国科学院城市环境研究所 | A kind of detoxification classification resource utilization method of domestic garbage incineration flyash |
| CN108179277A (en) * | 2017-12-21 | 2018-06-19 | 深圳清华大学研究院 | Flyash treatment method with high salt, content of beary metal is high |
| CN108179277B (en) * | 2017-12-21 | 2019-09-10 | 深圳清华大学研究院 | Flyash treatment method with high salt, content of beary metal is high |
| CN108480360A (en) * | 2018-03-04 | 2018-09-04 | 天津壹鸣环境科技股份有限公司 | Novel method for recycling fly ash resources and discharging tail gas in ultra-clean mode by adopting rotary kiln melting method |
| CN108480360B (en) * | 2018-03-04 | 2022-05-27 | 天津壹鸣环境科技股份有限公司 | Method for recycling fly ash resources and discharging tail gas in ultra-clean mode by melting method of rotary kiln |
| CN110639935A (en) * | 2019-09-29 | 2020-01-03 | 新中天环保股份有限公司 | Waste incineration fly ash treatment method |
| CN111408602A (en) * | 2020-01-16 | 2020-07-14 | 李晓清 | Harmless recycling treatment method for waste incineration fly ash |
| CN112090018A (en) * | 2020-08-27 | 2020-12-18 | 北京金隅琉水环保科技有限公司 | Process for treating fly ash by using purified waste acid |
| CN113000014A (en) * | 2021-03-02 | 2021-06-22 | 常熟理工学院 | Method for preparing efficient phosphorus removal agent by utilizing waste incineration fly ash and product thereof |
| CN113000014B (en) * | 2021-03-02 | 2023-04-21 | 常熟理工学院 | Method for preparing efficient dephosphorizing agent by utilizing waste incineration fly ash and product thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104084027A (en) | Waste incineration fly ash acid pickling method utilizing acid solution of flue tail gas | |
| CN106282585B (en) | A kind of detoxification classification resource utilization method of domestic garbage incineration flyash | |
| CN102513329B (en) | Harmless treatment method for urban garbage incineration fly ash | |
| CN103128097B (en) | A kind of processing method of fly ash from burning city domestic garbage | |
| CN106082646B (en) | The method for cooperateing with melting to prepare glass sand with domestic garbage incineration flyash using electroplating sludge | |
| CN101797575B (en) | Flyash treatment method for waste incineration | |
| CN109396162B (en) | Energy-saving treatment process of garbage fly ash | |
| CN110935710A (en) | Washing desalination treatment system, method and application of household garbage incineration fly ash | |
| CN103128005B (en) | Municipal solid waste incineration fly ash resource utilization method | |
| CN102206757B (en) | Heavy metal recycling method based on municipal solid waste incineration (MSWI) fly ash | |
| CN101239298A (en) | Sulfuric acid refining preprocessing method of life refuse burning flying ash | |
| CN101392332B (en) | Cleaning production technique for directly transforming rare earth sulfate bake ore to extract rare earth | |
| CN103978017A (en) | System and method for removing chlorine salt from waste incineration fly ash | |
| CN100575510C (en) | A kind of heavy metal assisting solvent that is used for incineration of refuse flyash | |
| CN104190697B (en) | A kind of containing water-soluble salt and organic hazardous waste recycling processing method | |
| CN105057320A (en) | Process for disposing waste residue of engineering | |
| CN104275245B (en) | The method of medical refuse burning flyash stepped-flotation separation detoxification | |
| CN105327927A (en) | Method and system for disposing incineration fly ash of household garbage | |
| CN112871961A (en) | Detoxification method of municipal solid waste incineration fly ash | |
| CN108179277A (en) | Flyash treatment method with high salt, content of beary metal is high | |
| CN108687115A (en) | A kind of cooperative processing method of incineration of refuse flyash and desulfurization wastewater | |
| CN106077031A (en) | A kind of method of disposal that microwave-hydrothermal method is applied to domestic garbage incineration flyash | |
| CN110639935A (en) | Waste incineration fly ash treatment method | |
| CN105771913A (en) | Method of utilizing modified corncobs to purify and elute cleaning liquid for soil seriously polluted by petroleum | |
| CN102312101B (en) | Extractant for treating heavy metals in fly ash and method for extracting heavy metals with the extractant |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20141008 |