CN101474468A - Method for treating burning flyash using chelant - Google Patents
Method for treating burning flyash using chelant Download PDFInfo
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- CN101474468A CN101474468A CNA2008100322334A CN200810032233A CN101474468A CN 101474468 A CN101474468 A CN 101474468A CN A2008100322334 A CNA2008100322334 A CN A2008100322334A CN 200810032233 A CN200810032233 A CN 200810032233A CN 101474468 A CN101474468 A CN 101474468A
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Abstract
A method which uses chelating agent for treating incineration fly ash comprises: first, the incineration fly ash is added with water, and then is added with the chelating agent for mulling after being diluted, and the chelating agent has the above constitutional formula. The invention utilizes the stabilization chelating agent of the incineration fly ash to complex domestic garbage or heavy metal in the incineration fly ash of industrial waste, and the chemical property of the complex compound is stable, thus avoiding the heavy metal contamination dissolving out. Compared with other stabilization methods, the invention has the advantages of simple technique, good stabilization effect, low cost, little using amount and good effect.
Description
Technical field:
The present invention relates to the chemical metallurgy field, relate in particular to macromolecular compound, particularly chelating agent, a kind of specifically method of using chelating agent to handle flying ash.
Background technology:
Incineration of refuse flyash is the dust of collecting in flue gas purification system behind the consumer waste incineration, and multiple harmful heavy metal material and dioxin-like chemicals such as the higher chromium that can be gone out by water logging of content, lead, zinc, cadmium are arranged in the incineration of refuse flyash.Incineration of refuse flyash leaching experiment testing result also shows: heavy metal concentration all is higher than solid waste and leaches the toxicity judging standard in the leachate, thus incineration of refuse flyash to be identified as be a kind of danger wastes.In the prior art, at the mode disposal of refuse flying ash of danger wastes landfill yard landfill, there is the secondary pollution crisis after the employing cement solidification.
Summary of the invention:
The object of the present invention is to provide a kind of method of using chelating agent to handle flying ash, the method for described this processing flying ash will solve the technical problem that the mode of disposal of refuse flying ash in the prior art can not the pollution abatement crisis.
The method of this processing flying ash of the present invention is characterized in that, at first adds water in described flying ash, after the flying ash dilution, adds chelating agent again and mixes, and described chelating agent has following structural formula:
Wherein, K is alkali metal or alkaline-earth metal or amino; R1 is methyl or ethyl or propyl group or butyl; R2 is methyl or ethyl or propyl group or butyl.
Further, the proportion of described chelating agent under 20 ℃ of temperature is 1.1～1.25.
Further, the viscosity of described chelating agent under 20 ℃ of temperature is 7.8mPa.s.
Further, the pH value of described chelating agent under 20 ℃ of temperature is between 13.5～14.
Further, behind described flying ash dilute with water, add again in the process that chelating agent mixes, comprise the process of the heavy metal generation complex reaction in a chelating agent and the flying ash.
Further, the weight of the chelating agent of adding accounts for 0.01%～30% of flying ash weight.
Further, the weight of the chelating agent of adding accounts for 0.1%～3% of flying ash weight.
Further, described water running water or river or underground water or water for industrial use or middle water or ion exchange water or distilled water.
Concrete, below be the comparatively representational proterties of flying ash stabilizing chelating agent of the present invention:
1. outward appearance: brown～russet transparency liquid
2. proportion (20 ℃): 1.1～1.25
3. viscosity (20 ℃): 7.8mPas
(4.pH 20 ℃): more than 13.5.
The mode of chelating agent and heavy metal reaction is as follows among the present invention, its operation principle is to add an amount of flying ash stabilizing chelating agent and water in flying ash, it is mixing evenly, make heavy metal and chelating agent generation complex reaction in the flying dust, generate insoluble chemical inertness thing, heavy metal contaminants in the reduction flying dust is to the mobility of the ecosphere, with the environmental pollution of avoiding flying dust to cause.
The present invention can handle the heavy metal in the harmful substances such as solid powdery, muddy or aqueous flying ash, slag, soil, mud, plant chimney stalk, particularly to the heavy metal in the flying ash, and treatment effect the best.Heavy metal (M) can be in the metals such as lead, mercury, cadmium, chromium, zinc, arsenic any one or a few.
The chelating agent that adopts among the present invention is the polymer chemistry medicine, macromolecule can be brought into play the complexing effect to greatest extent, in the stabilization processes process of flying ash and after handling, can not produce any pernicious gas or secondary pollution material, treatment effect is temperature influence hardly, and has long-term security and stability; When object being treated is the situation of waste water, can adopt directly to add or add the mode of mixing that stirs chelating agent that adds, and time and the temperature that stirs do not had special requirement.When object being treated is solid-state situations such as flying dust, add adding chelating agent again after an amount of water dilution and mix.It can be running water, river, underground water, water for industrial use, Zhong Shui, ion exchange water, distilled water etc. that the present invention mixes used dilution water.No matter use which kind of water, do not influence treatment effect; Insoluble matter after the processing has good resistance to acids and bases, heat-resisting quantity; Can handle flying dust jointly with cement, the stabilization effect of chelating agent is not affected.
The present invention and prior art contrast, and its effect is actively with tangible.The present invention utilizes the heavy metal in stabilized solution of chelating agents complexing house refuse or the industrial waste incineration flying dust, and the chemical property of complex compound is stable, has avoided the heavy metal contaminants stripping.The present invention has filled up the blank of domestic this technical field, compares with other stabilization method, and technology is simple, stablizing effect good, expense is cheap, consumption is few, effective.
The specific embodiment:
The invention provides a kind of method of using chelating agent to handle flying ash, comprise that a flying dust in incinerator adds the process of above-mentioned chelating agent and water, comprise one with chelating agent and the mixing uniform process of water, comprise the process of the heavy metal mode complex reaction in chelating agent and the flying ash.Described chelating agent has following structural formula:
Wherein, K is alkali metal or alkaline-earth metal or amino; R1 is methyl or ethyl or propyl group or butyl; R2 is methyl or ethyl or propyl group or butyl.
Further, the chelating agent of adding accounts for 0.01%～30% of flying ash weight, and is preferred, between 0.1%～3%.
Example 1:
In 100g flying ash (lead content 2500mg/kg, cadmium content 120mg/kg, chromium content 150mg/kg, copper content 626mg/kg), add water 28g and this chelating agent 2g, stirred 10 minutes.In solution (pH4.93), soaked into 6 hours afterwards, at room temperature placed again 10 hours, carry out dissolution test then.Result of the test (stripping quantity): below the plumbous 0.05mg/L, below the cadmium 0.05mg/L, below the chromium 0.05mg/L, below the copper 0.05mg/L.
Example 2:
In 100g flying ash (lead content 2500mg/kg, cadmium content 120mg/kg, chromium content 150mg/kg, copper content 626mg/kg), add water 29g, cement 20g and this chelating agent 1g, stirred 10 minutes.In solution (pH4.93), soaked into 6 hours afterwards, at room temperature placed again 10 hours, carry out dissolution test then.Result of the test (stripping quantity): below the plumbous 0.05mg/L, below the cadmium 0.05mg/L, below the chromium 0.05mg/L, below the copper 0.05mg/L.
Example 3:
Adding water 30g in 100g flying ash (lead content 2500mg/kg, cadmium content 120mg/kg, chromium content 150mg/kg, copper content 626mg/kg) stirred 10 minutes.In solution (pH4.93), soaked into 6 hours afterwards, at room temperature placed again 10 hours, carry out dissolution test then.Result of the test: lead release 14.4mg/L.
Example 4:
In 100g flying ash (lead content 2500mg/kg, cadmium content 120mg/kg, chromium content 150mg/kg, copper content 626mg/kg), add water 30g, cement 20g, stirred 10 minutes.In solution (pH4.93), soaked into 6 hours afterwards, at room temperature placed again 10 hours, carry out dissolution test then.Result of the test: lead release 1.4mg/L.
By incineration of refuse flyash is being added under the air-tight state after chelating agent realizes stabilization processes, the flying dust after the processing satisfies " hazardous waste judging standard-leachings toxicity discriminating " (GB5085.3-1996) standard-required.But the security landfill field construction cost and the flying dust landfill expense of conserve expensive make the incineration of refuse flyash stabilization processes technology of China realize progress essence, great-leap-forward simultaneously, and be significant to health, the sustainable development of China's waste incineration cause.
Claims (8)
1. method of using chelating agent to handle flying ash, it is characterized in that: at first add water in described flying ash, after the flying ash dilution, add chelating agent again and mix, described chelating agent has following structural formula:
Wherein, K is alkali metal or alkaline-earth metal or amino; R1 is methyl or ethyl or propyl group or butyl; R2 is methyl or ethyl or propyl group or butyl.
2. the method for processing flying ash as claimed in claim 1 is characterized in that: the proportion of described chelating agent under 20 ℃ of temperature is 1.1～1.25.
3. the method for processing flying ash as claimed in claim 1 is characterized in that: the viscosity of described chelating agent under 20 ℃ of temperature is 7.8mPa.s.
4. the method for processing flying ash as claimed in claim 1 is characterized in that: the pH value of described chelating agent under 20 ℃ of temperature is between 13.5～14.
5. the method for processing flying ash as claimed in claim 1 is characterized in that: add behind described flying ash dilute with water in the process that chelating agent mixes again, comprise the process of the heavy metal generation complex reaction in a chelating agent and the flying ash.
6. the method for processing flying ash as claimed in claim 1 is characterized in that: the weight of the chelating agent of adding accounts for 0.01%～30% of flying ash weight.
7. the method for processing flying ash as claimed in claim 6 is characterized in that: the weight of the chelating agent of adding accounts for 0.1%～3% of flying ash weight.
8. the method for processing flying ash as claimed in claim 1 is characterized in that: described water running water or river or underground water or water for industrial use or middle water or ion exchange water or distilled water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100322334A CN101474468A (en) | 2008-01-03 | 2008-01-03 | Method for treating burning flyash using chelant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100322334A CN101474468A (en) | 2008-01-03 | 2008-01-03 | Method for treating burning flyash using chelant |
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| CN101474468A true CN101474468A (en) | 2009-07-08 |
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| CNA2008100322334A Pending CN101474468A (en) | 2008-01-03 | 2008-01-03 | Method for treating burning flyash using chelant |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102416396A (en) * | 2011-08-03 | 2012-04-18 | 上海市环境工程设计科学研究院有限公司 | Method for processing incineration fly ash with composite medicament |
| CN102631761A (en) * | 2012-04-10 | 2012-08-15 | 重庆工商大学 | Application of using N-benzoyl-N-phenylhydroxylamine as stabilizing agent in domestic waste incineration fly ash treatment |
| CN103864654A (en) * | 2014-03-03 | 2014-06-18 | 同济大学 | Dithiocarboxylic-terminated polyamidoamine dentritic polymer as well as preparation method and use thereof |
| CN105063359A (en) * | 2015-07-20 | 2015-11-18 | 常州市好利莱光电科技有限公司 | Method for separating and recovering heavy metal in waste incineration fly ash |
| CN106268212A (en) * | 2016-08-11 | 2017-01-04 | 山东华泰纸业股份有限公司 | A kind of papermaking solid waste burning flying dust is for the technique of thermoelectricity flue gas desulfurization |
| CN106363004A (en) * | 2015-07-22 | 2017-02-01 | 爱土工程环境科技有限公司 | Garbage burning electricity generation flying ash pre-treatment apparatus and garbage burning electricity generation flying ash treatment method |
| CN108982752A (en) * | 2018-07-26 | 2018-12-11 | 安徽安江环保科技有限公司 | A kind of quality determining method of the flyash curing chelating agent based on environmental change |
| CN110563357A (en) * | 2019-09-15 | 2019-12-13 | 北京航天国环技术有限公司 | fly ash treatment device |
| CN116492806A (en) * | 2023-03-06 | 2023-07-28 | 南京鑫豪高分子材料有限公司 | Method for removing peculiar smell after treatment of incineration fly ash by chelating agent |
-
2008
- 2008-01-03 CN CNA2008100322334A patent/CN101474468A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102416396A (en) * | 2011-08-03 | 2012-04-18 | 上海市环境工程设计科学研究院有限公司 | Method for processing incineration fly ash with composite medicament |
| CN102631761A (en) * | 2012-04-10 | 2012-08-15 | 重庆工商大学 | Application of using N-benzoyl-N-phenylhydroxylamine as stabilizing agent in domestic waste incineration fly ash treatment |
| CN102631761B (en) * | 2012-04-10 | 2014-12-24 | 重庆工商大学 | Application of using N-benzoyl-N-phenylhydroxylamine as stabilizing agent in domestic waste incineration fly ash treatment |
| CN103864654A (en) * | 2014-03-03 | 2014-06-18 | 同济大学 | Dithiocarboxylic-terminated polyamidoamine dentritic polymer as well as preparation method and use thereof |
| CN103864654B (en) * | 2014-03-03 | 2015-11-04 | 同济大学 | The polyamide-amide branch-shape polymer of dithionic acid end-blocking, preparation method and its usage |
| CN105063359A (en) * | 2015-07-20 | 2015-11-18 | 常州市好利莱光电科技有限公司 | Method for separating and recovering heavy metal in waste incineration fly ash |
| CN106363004B (en) * | 2015-07-22 | 2019-04-30 | 爱土工程环境科技有限公司 | A kind of pretreatment unit and processing method of waste incineration and generating electricity flying dust |
| CN106363004A (en) * | 2015-07-22 | 2017-02-01 | 爱土工程环境科技有限公司 | Garbage burning electricity generation flying ash pre-treatment apparatus and garbage burning electricity generation flying ash treatment method |
| CN106268212A (en) * | 2016-08-11 | 2017-01-04 | 山东华泰纸业股份有限公司 | A kind of papermaking solid waste burning flying dust is for the technique of thermoelectricity flue gas desulfurization |
| CN108982752A (en) * | 2018-07-26 | 2018-12-11 | 安徽安江环保科技有限公司 | A kind of quality determining method of the flyash curing chelating agent based on environmental change |
| CN110563357A (en) * | 2019-09-15 | 2019-12-13 | 北京航天国环技术有限公司 | fly ash treatment device |
| CN110563357B (en) * | 2019-09-15 | 2022-04-19 | 北京航天国环技术有限公司 | Fly ash treatment device |
| CN116492806A (en) * | 2023-03-06 | 2023-07-28 | 南京鑫豪高分子材料有限公司 | Method for removing peculiar smell after treatment of incineration fly ash by chelating agent |
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Owner name: LONG JISHENG Free format text: FORMER OWNER: SHANGHAI RIJI ENVIRONMENTAL TECHNOLOGY CONSULTING CO., LTD. Effective date: 20090911 |
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Effective date of registration: 20090911 Address after: Zip code 3002, 500 Chengdu North Road, Huangpu District, Shanghai, zip code: 200003 Applicant after: Dragon Ji Sheng Co-applicant after: Japan Environmental Technology Support Agency Address before: 4 \/ F, Kang Hai building, 828 Xikang Road, Jingan District, Shanghai, zip code: 200040 Applicant before: Shanghai day technology Environmental Technology Consulting Co., Ltd. Co-applicant before: Japan Environmental Technology Support Agency |
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Open date: 20090708 |