CN106964628A - A kind of incineration of refuse flyash harmless disposal method - Google Patents

A kind of incineration of refuse flyash harmless disposal method Download PDF

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Publication number
CN106964628A
CN106964628A CN201710081730.2A CN201710081730A CN106964628A CN 106964628 A CN106964628 A CN 106964628A CN 201710081730 A CN201710081730 A CN 201710081730A CN 106964628 A CN106964628 A CN 106964628A
Authority
CN
China
Prior art keywords
fused salt
incineration
flying dust
refuse flyash
reaction
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
Application number
CN201710081730.2A
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Chinese (zh)
Inventor
赵鹏
景明海
郭术光
张慧荣
赵玉彬
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Changan University
Original Assignee
Changan University
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Changan University filed Critical Changan University
Priority to CN201710081730.2A priority Critical patent/CN106964628A/en
Publication of CN106964628A publication Critical patent/CN106964628A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B09DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09BDISPOSAL OF SOLID WASTE
    • B09B3/00Destroying solid waste or transforming solid waste or contaminated solids into something useful or harmless
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B09DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09BDISPOSAL OF SOLID WASTE
    • B09B3/00Destroying solid waste or transforming solid waste or contaminated solids into something useful or harmless
    • B09B3/0025Agglomeration, binding or encapsulation of solid waste
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B09DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09BDISPOSAL OF SOLID WASTE
    • B09B5/00Operations not covered by single other subclass or by a single other group in this subclass
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B09DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09BDISPOSAL OF SOLID WASTE
    • B09B2220/00Type of waste materials treated
    • B09B2220/06Incineration ashes

Abstract

The present invention relates to a kind of incineration of refuse flyash harmless disposal method.Involved method includes:Incineration of refuse flyash is added in molten state sodium chloride and reacted, flying dust fused salt slag and escaping gas are produced in course of reaction;The flying dust fused salt slag generated in the course of reaction is deposited in molten state sodium chloride bottom from molten state sodium chloride, is filled after the flying dust fused salt slag for collecting bottom;Escaping gas is produced in the course of reaction and collects heavy metal therein by condensing, remaining gas discharge;Fused salt auxiliary agent is added with the incineration of refuse flyash.The processing method technique of the present invention is simple, and flying dust volume reduces 50%, and flying dust fused salt slag weight reduces 50%, and volume, weight volume reduction rate are obvious.

Description

A kind of incineration of refuse flyash harmless disposal method
Technical field
The invention belongs to the dangerous disposition of solid waste of field of environment protection and comprehensive utilization, and in particular to a kind of rubbish burns Burn flying dust harmless disposal method.
Background technology
Traditional incineration of refuse flyash has many disposal technologies.It is specifically divided into four major classes:Separation and leaching technology;It is heat-treated skill Art, solidification stabilization technique and other technologies.But recycling, innoxious, minimizing and economical rationality, peace can not be met simultaneously Complete efficient actual requirement.
Solidify Stabilized technology, not only increase-volume, and solidification stabilizing material price height enterprise, add landfill storage comprehensive cost Also it is very high;
Separation extraction class technical matters is complicated, and equipment is expensive, and cost is high;
There is high temperature, high energy consumption and maximum discharge in heat treatment class technology, but in actual applications, incineration of refuse flyash There is the innoxious and minimizing of some superiority, especially smelting technology fairly obvious in terms of recycling, minimizing after heat treatment, Developed country is applied.
As the improvement of people's living standards, the raising of environmental consciousness, the chemical composition of incineration of refuse flyash also there occurs Obvious change, outstanding feature is high salinity and high oxidation calcium content so that traditional fusion technology is met difficulty, and is not being added Plus in the case of cosolvent, the melting temperature of incineration of refuse flyash adds secondary flying ash processing, high energy more than 1500 DEG C There is unprecedented technical difficulty in consumption, smelting process.And even if using sintering technology, sintering temperature is very high, the salt in flying dust Divide to directly affect is needed to carry out washing desalting processing before sintered article quality, sintering, and cost is improved, complex process, and sintering system The Leaching of Heavy Metals risk of product is still present.
Firing technique is mixed using cement after washing, cement production capacity surplus, Cement clinker buring incorporation is small, and kiln tail chlorion is dense Degree is improved and the hidden danger of kiln tail preheater skinning increases, and villaumite reclaims, filters many technical problems such as hardened so that cement Mix burning and also face many difficulties.
Separating beavy metal, it is the innoxious key technology of incineration of refuse flyash to decompose bioxin, lacks cost-effective skill Art method is the outstanding problem faced both at home and abroad.
The content of the invention
For domestic and international the deficiencies in the prior art, the present invention provides a kind of low cost, minimizing and innoxious process for treating.
Incineration of refuse flyash harmless disposal method provided by the present invention includes:Incineration of refuse flyash is added into molten state Reacted in sodium chloride;The flying dust fused salt slag generated in course of reaction is deposited in molten state sodium chloride bottom from molten state sodium chloride Portion, the flying dust fused salt slag for collecting bottom is filled;Escaping gas is produced in course of reaction and collects therein heavy by condensing Metal, remaining gas discharge;Fused salt auxiliary agent is added with the incineration of refuse flyash;The fused salt auxiliary agent is potassium chloride, chlorination Aluminium, iron chloride, calcium chloride, magnesium chloride, sodium sulphate, potassium sulfate, sodium carbonate, potassium carbonate, carbonate and one kind of sulfate or two The composition of the above is planted, the addition of the fused salt auxiliary agent is the 1-20% of sodium chloride quality.
In a kind of embodiment, flying dust additive is added with incineration of refuse flyash of the invention;The flying dust additive For mixture more than one or both of bentonite, silicon ash, flyash and metakaolin, the addition of the flying dust additive Quality is the 0-20wt% of incineration of refuse flyash quality;
In a kind of embodiment, reaction temperature of the invention is 600-1000 DEG C, and the fused salt reaction time is 0.5-8 hours.
In a kind of embodiment, remaining gas of the invention washs discharge by sodium hydroxide lye.
Compared with prior art, the beneficial effect of flyash treatment method for waste incineration of the invention is:
(1) processing method technique of the invention is simple, flying dust volume reduction 50%, fused salt slag weight reduction 50%, volume, Weight volume reduction rate is obvious;
(2) processing method of the invention, low compared with fusion method heat treatment temperature, energy consumption is low.
(3) processing method of the invention, fused salt cost is low, and integrated treatment operating cost is low;
(4) processing method of the invention, environmental protection, no secondary environmental pollution.
Brief description of the drawings
Fig. 1 is process chart of the invention.
Embodiment
The poisonous flying dust that the incineration of refuse flyash of the present invention obtains for consumer waste incineration or medical refuse burning.Without Cross it is any processing be directly added into fused salt carry out clear up reaction.
Present invention reaction terminates rear flying dust fused salt and becomes fused salt slag to separate discharge from melt, household garbage field can be sent to fill out Bury.
Escaping gas is by condensing after collection during fused salt reaction of the present invention, and heavy metal Pb, Cr, Cd, Cu, Zn pass through wet Method Metallurgical resourcesization are utilized, qualified discharge after a small amount of gas is handled by gas purifications such as sodium hydroxide solutions.
The specific embodiment provided the following is inventor, to be further explained explanation to technical scheme.
Embodiment 1:
Certain garbage burning factory flying dust is subjected to Leaching of Heavy Metals concentration and carries out test result such as table 1 below, it can be seen that Cd, Pb severe overweights, belong to danger wastes.
The original fly-ash heavy metal leaching concentration of table 1 is contrasted with national standard
With reference to Fig. 1, by 100 grams of incineration of refuse flyash, 6 grams of fused salt auxiliary agent calcium chloride adds 850 DEG C of molten state sodium chloride Middle reaction 3 hours, the flying dust fused salt slag generated in course of reaction is discharged from molten state sodium chloride and is deposited in molten state chlorination Filled after sodium bottom, the flying dust fused salt slag for collecting bottom, escaping gas is produced in course of reaction and collects it by condensing In heavy metal, remaining gas discharge;
The Leaching of Heavy Metals concentration of measurement flying dust fused salt slag see the table below 2, there it can be seen that flying dust fused salt slag is fully achieved The requirements of household refuse landfill sites pollutant catabolic gene indexs.
Heavy metal ion leaching concentration is contrasted with original flying dust and national standard after the fused salt reaction treatment of table 2
Embodiment 2:
By 100 grams of incineration of refuse flyash, 5 grams of flying dust additive silicon ash, 8 grams of fused salt auxiliary agent calcium chloride adds 900 DEG C of chlorine Change in sodium fusion salt and react 3 hours, the flying dust fused salt slag generated in course of reaction is discharged from molten state sodium chloride and is deposited in molten Melt state sodium chloride bottom, filled after the flying dust fused salt slag for collecting bottom, generation escaping gas passes through cold in course of reaction It is solidifying to collect heavy metal therein, remaining gas discharge;
The Leaching of Heavy Metals concentration of measurement flying dust fused salt slag see the table below 3, there it can be seen that flying dust fused salt slag is fully achieved The requirements of household refuse landfill sites pollutant catabolic gene indexs.
Heavy metal ion leaching concentration is contrasted with original flying dust and national standard after the fused salt reaction treatment of table 3
Embodiment 3:
By 100 grams of incineration of refuse flyash, 10 grams of flying dust additive flyash, 5 grams of melt auxiliary agent calcium chloride adds 1000 DEG C Sodium chloride fused salt in react 1 hour, the flying dust fused salt slag generated in course of reaction is discharged and precipitated from molten state sodium chloride Filled in behind molten state sodium chloride bottom, the flying dust fused salt slag for collecting bottom, escaping gas is produced in course of reaction and is led to Cross condensation and collect heavy metal therein, remaining gas discharge;
The Leaching of Heavy Metals concentration of flying dust fused salt slag see the table below 4, there it can be seen that flying dust fused salt slag fullys meet life The requirement of refuse landfill pollutant catabolic gene index living.
Heavy metal ion leaching concentration is contrasted with original flying dust and national standard after the fused salt reaction treatment of table 4
Embodiment 4:
By 100 grams of incineration of refuse flyash, 10 grams of flying dust additive bentonite, 7 grams of melt auxiliary agent aluminium chloride adds 600 DEG C Sodium chloride fused salt in react 4 hours, the flying dust fused salt slag generated in course of reaction is discharged and precipitated from molten state sodium chloride Filled in behind molten state sodium chloride bottom, the flying dust fused salt slag for collecting bottom, escaping gas is produced in course of reaction and is led to Cross condensation and collect heavy metal therein, remaining gas discharge;
The Leaching of Heavy Metals concentration of flying dust fused salt slag see the table below 5, there it can be seen that flying dust fused salt slag fullys meet life The requirement of refuse landfill pollutant catabolic gene index living.
Heavy metal ion leaching concentration is contrasted with original flying dust and national standard after the fused salt reaction treatment of table 5
Embodiment 5:
By 100 grams of incineration of refuse flyash, 9 grams of flying dust additive metakaolin, 16 grams of fused salt auxiliary agent sodium carbonate adds 950 DEG C sodium chloride fused salt in react 6 hours, the flying dust fused salt slag generated in course of reaction is discharged and sunk from molten state sodium chloride Form sediment in molten state sodium chloride bottom, filled after the flying dust fused salt slag for collecting bottom, escaping gas is produced in course of reaction Heavy metal therein is collected by condensing, remaining gas discharge;
The Leaching of Heavy Metals concentration of flying dust fused salt slag see the table below 6, there it can be seen that flying dust fused salt slag fullys meet life The requirement of refuse landfill pollutant catabolic gene index living.
Heavy metal ion leaching concentration is contrasted with original flying dust and national standard after the fused salt reaction treatment of table 6
Embodiment 6:
By 100 grams of flying dust, 9 grams of flying dust additive flyash, 16 grams of melt auxiliary agent potassium chloride adds 650 DEG C of sodium chloride Reacted 8 hours in fused salt, the flying dust fused salt slag generated in course of reaction is discharged from molten state sodium chloride and is deposited in molten state Filled after sodium chloride bottom, the flying dust fused salt slag for collecting bottom, escaping gas is produced in course of reaction and is received by condensing Collect heavy metal therein, remaining gas discharge;
The Leaching of Heavy Metals concentration of flying dust fused salt slag see the table below 7, there it can be seen that flying dust fused salt slag fullys meet life The requirement of refuse landfill pollutant catabolic gene index living.
Heavy metal ion leaching concentration is contrasted with original flying dust and national standard after the fused salt reaction treatment of table 7

Claims (4)

1. a kind of incineration of refuse flyash harmless disposal method, it is characterised in that method includes:
Incineration of refuse flyash is added in molten state sodium chloride and reacted;
The flying dust fused salt slag generated in course of reaction is deposited in molten state sodium chloride bottom from molten state sodium chloride, collects bottom Flying dust fused salt slag filled;
Escaping gas is produced in course of reaction and collects heavy metal therein by condensing, remaining gas discharge;
Fused salt auxiliary agent is added with the incineration of refuse flyash;The fused salt auxiliary agent is potassium chloride, aluminium chloride, iron chloride, chlorination Calcium, magnesium chloride, sodium sulphate, potassium sulfate, sodium carbonate, potassium carbonate, one or more kinds of compositions of carbonate and sulfate, The addition of the fused salt auxiliary agent is the 1-20% of sodium chloride quality.
2. incineration of refuse flyash harmless disposal method as claimed in claim 1, it is characterised in that the incineration of refuse flyash In be added with flying dust additive;The flying dust additive is one or both of bentonite, silicon ash, flyash and metakaolin Mixture above, the addition quality of the flying dust additive is the 0-20wt% of incineration of refuse flyash quality.
3. incineration of refuse flyash harmless disposal method as claimed in claim 1, it is characterised in that the reaction temperature is 600-1000 DEG C, the fused salt reaction time is 0.5-8 hours.
4. incineration of refuse flyash harmless disposal method as claimed in claim 1, it is characterised in that the remaining gas is passed through Sodium hydroxide lye washing discharge.
CN201710081730.2A 2017-02-15 2017-02-15 A kind of incineration of refuse flyash harmless disposal method Pending CN106964628A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110038872A (en) * 2018-01-15 2019-07-23 东海大学 The method for handling incinerated flying ash and waste
CN111359136A (en) * 2020-04-03 2020-07-03 连云港新江环保材料有限公司 Dioxin detoxification chelating agent for fly ash and preparation method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101822886A (en) * 2010-05-26 2010-09-08 刘阳生 Secondary gasification method of fly ash in waste incineration
CN101885584A (en) * 2010-07-20 2010-11-17 刘阳生 Method for treating waste incineration fly ash by electric melting
US20150314155A1 (en) * 2012-12-05 2015-11-05 Solvay Sa Treatment of Sodic Fly Ash for Reducing the Leachability of Selenium Contained Herein
CN106378352A (en) * 2016-11-18 2017-02-08 华中科技大学 Fused salt heat treatment method for rubbish incineration fly ash

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101822886A (en) * 2010-05-26 2010-09-08 刘阳生 Secondary gasification method of fly ash in waste incineration
CN101885584A (en) * 2010-07-20 2010-11-17 刘阳生 Method for treating waste incineration fly ash by electric melting
US20150314155A1 (en) * 2012-12-05 2015-11-05 Solvay Sa Treatment of Sodic Fly Ash for Reducing the Leachability of Selenium Contained Herein
CN106378352A (en) * 2016-11-18 2017-02-08 华中科技大学 Fused salt heat treatment method for rubbish incineration fly ash

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110038872A (en) * 2018-01-15 2019-07-23 东海大学 The method for handling incinerated flying ash and waste
CN111359136A (en) * 2020-04-03 2020-07-03 连云港新江环保材料有限公司 Dioxin detoxification chelating agent for fly ash and preparation method thereof

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Application publication date: 20170721