CN107137858B - A kind of method garbage flying ash processing stabilization agent and flying dust is handled using it - Google Patents
A kind of method garbage flying ash processing stabilization agent and flying dust is handled using it Download PDFInfo
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- CN107137858B CN107137858B CN201710484116.0A CN201710484116A CN107137858B CN 107137858 B CN107137858 B CN 107137858B CN 201710484116 A CN201710484116 A CN 201710484116A CN 107137858 B CN107137858 B CN 107137858B
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D3/00—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances
- A62D3/30—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
- A62D2101/40—Inorganic substances
- A62D2101/43—Inorganic substances containing heavy metals, in the bonded or free state
Abstract
The present invention provides a kind of garbage flying ash processing stabilization agents, which is characterized in that according to mass fraction meter, by following material composition: 9-13 parts of waterglass, 1-4 parts of sodium salt compound；Wherein sodium salt compound is one of sodium phosphate, sodium hydroxide, vulcanized sodium, sodium thiosulfate, activated alumina or several.The present invention also provides a kind of methods using stabilization agent processing flying dust.The present invention passes through the ingredient and proportion of optimum choice stabilization agent, a certain proportion of sodium salt compound is mixed with waterglass, can be used for the dissociation of the active silica-alumina calcium system of exciting agent flying dust, forms gel, avoid secondary pollution, processing cost is low, stabilizing fly ash after high-efficient, processing.
Description
Technical field
The application belongs to field of environment protection, and in particular to a kind of garbage flying ash processing stabilization agent and using at it
The method for managing flying dust.
Background technique
Currently, the main processing technique of incineration of refuse flyash has: cement solidification method, chemical agent stabilisation, melting and solidification
Method and cement kiln synergic processing method etc..
From economy, ease for operation and utilization of area etc. consider, cement solidification method be most suitable processing method it
One.External researcher has made many research to using cement solidification method processing flying dust, and this method is also external
For handling one of common method of flying dust.But increase-volume amount is big after cement solidification processing, and if contains obstruction water in flying dust
When the ingredient that mud normally condenses, it can often be cured the problems such as body intensity is low, harmful substance leaching rate is high.Cement class curing materials
It there are many type, is generally used according to the characteristic of flying dust and processing requirement classification, representative cement has ordinary cement and swollen
Swollen cement, is usually made of sial and calcium oxide.Cement fixation is exactly that cement and flying dust are uniformly mixed with water, and water occurs
Reaction is closed, is gradually hardened, poisonous metal is closed.In order to improve fixed effect, guarantees that cement can effectively complete hydration reaction, have
When additive appropriate need to be added into mixture according to the type of flying dust.
The shortcomings that cement solidification method, is that cement consumption is big, and soluble chlorine salt dissolving, sulfide in flying dust etc. can be to water
The hydro-combination process of mud generates certain influence, causes the treatment effect of flying dust unstable.The increase-volume and weight gain of solidified body after processing
Obviously, the cost of disposal in later period is increased.
Chemical agent solidification is that heavy metal fixative and water are added in flying dust, is uniformly mixed to form insoluble compound,
To the method for fixed heavy metal.Heavy metal fixative has inorganic matters and the water solubilitys such as two iron of chlorination, liquid aluminium sulfate, vulcanized sodium
Chelating macromolecule etc..These medicaments are either used alone or as a mixture, and can obtain preferable effect.Have generally, due to flying dust
There is stronger alkalinity, the diafiltration of heavy metal is fewer, but lead is easy diafiltration under alkaline condition, so additive is added, adjusts
Whole pH value, for preventing the diafiltration of lead from having preferable effect, the infiltration of mercury can be prevented by adding macromolecule intercalating agent when pH value is lower
Filter.Hazardous waste is handled with medicament stabilization technology, can reach waste while realizing that waste is innoxious and reduce perhaps not
Increase-volume, to improve the overall efficiency and economy of hazardous waste processing disposal system.Meanwhile it can be by improving intercalating agent
Structure and performance make its chemical chelating effect between hazard component in waste be strengthened, and then improve and stabilize product
Long-time stability reduce influence of the stabilisation product to environment during final disposal.The medicament used in this method is mostly height
Molecule chelating agent, costly, and flying dust after treatment is not condensed into blocks price, not readily transportable and landfill.
Another method is melting and solidification method, and flying dust is heated to melting temperature (1200-1600 DEG C) by this method, after melting
Organic matter thermal decomposition, burning, gasification in flying dust, and heavy metal sinks to the bottom separation of smelting furnace because density is big；Silicates
Residue floats on above fusant, and glass state material is formed after quenching, by the compact crystal structure of vitreum, it is ensured that heavy metal
Stablize, can be used as building materials use, volatile metal is then separated in flue dust.Melting and solidification method needs special melting furnace,
The research and application of plasma smelting furnace are by note, this is because there is plasma heating output energy to be easy to control and adjust
Section, it is easy to operate, it is easy enlargement, be easy to get high temperature, melting atmosphere can by adjust working gas ingredient come the advantages that control.
At the same time, fusion method energy consumption is high, and secondary pollution may be brought during high-temperature fusion, is needed to high-temperature fusion process
In flue gas carry out processing again.
Cement kiln synergic processing is a kind of new waste treatment means, it, which refers to, will meet or meet after pretreatment
The solid waste investment cement kiln for entering kiln requirement, realizes the innoxious place to solid waste while carrying out clinker production
Set process.The innoxious and recycling of flying dust may be implemented in incineration of refuse flyash cement kiln synergic processing method.
Summary of the invention
In existing flying dust processing technique, processing cost is higher, and increase-volume weight gain is more apparent, and certain methods can also be brought secondary
Pollution, a series of problems that later period cost of disposal is high, effect is unstable, are based on this, can be used in flying the present invention provides one kind
The stabilization agent of ash processing and the method for carrying out flying dust processing using the stabilization agent.
The stabilization agent composition that the present invention uses is as follows, and number described in formula is mass fraction:
9-13 parts of waterglass；
1-4 parts of sodium salt compound；
Wherein sodium salt compound is sodium phosphate, sodium hydroxide, vulcanized sodium, sodium thiosulfate, one in activated alumina
Kind is several.
Preferably, waterglass 10-12 parts, 2-3 parts of sodium salt compound.
Preferably, sodium salt compound is that sodium phosphate and non-sodium ascorbyl phosphate are formed according to 1: 1-3 ratio, non-sodium ascorbyl phosphate choosing
From one of sodium hydroxide, vulcanized sodium, sodium thiosulfate, activated alumina or several.
Preferably, modulus of water glass 1-1.5.
Preferably, 10 parts of waterglass, 1 part of sodium phosphate, non-sodium ascorbyl phosphate 1-2 parts, non-sodium ascorbyl phosphate is selected from sodium hydroxide, sulphur
Change one of sodium, sodium thiosulfate, activated alumina or several.
In terms of the cardinal principle that the stabilization agent stablizes heavy metal in flying dust has following two: (1) being stablized by addition
Chemical drug agent excites the gelling property of flying dust, makes flying dust that macadam effect occur, and the heavy metal of part is coated, and deposits its stable
It is in adhesive bond；(2) it is chemically reacted by the heavy metal in the chemical constituent and flying dust in stabilization agent, forms ratio
More stable compound is present in solidified body.
Further, the present invention also provides a kind of methods for handling flying dust, comprising the following steps:
(1) it takes fly ash from burning city domestic garbage dry and pre-processes；
(2) stabilization agent that the present invention uses is mixed by above-mentioned formula, is stirred evenly；
(3) by stabilization agent and water according to 1: 35-100 ratio mixed diluting；
(4) stabilization agent after dilution is added according to the ratio that stabilization agent accounts for flying dust quality 4 ‰~12 ‰ and is flown
In ash；
(5) after flying dust complete wetting, the flying dust after wetting is transferred in mold and is vibrated to that there is no bubbles to emerge；
(6) constant-temp. and-moisture maintenance maintenance, demoulding after 20-30h are transferred to；
(7) continue to conserve 12-15 days in constant-temp. and-moisture maintenance.
Preferably, the stabilization agent after dilution is added according to the ratio that stabilization agent accounts for flying dust quality 5 ‰~10%0
Enter in flying dust.
The beneficial effects of the present invention are:
(1) present invention passes through the ingredient and proportion of optimum choice stabilization agent, contains so that waterglass mixing is a certain proportion of
Sodium salt compound can be used for the dissociation of the active silica-alumina calcium system of exciting agent flying dust, forms gel, avoids secondary pollution,
Processing cost is low, stabilizing fly ash after high-efficient, processing；
(2) incineration of refuse flyash is fixed in the curing process, technical process is simple, it is only necessary to when passing through two weeks or so
Between curing can be filled；
(3) stabilization agent of the invention is aqua, not will increase the weight of flying dust after processing substantially；
(4) treatment effeciency of stabilization agent of the present invention is very high, it is only necessary to select the dosage of flying dust quality 4 ‰~12 ‰ i.e.
The fixation to heavy metal in flying dust can be achieved.
Detailed description of the invention
In order to keep the purpose of the present invention, technical scheme and beneficial effects clearer, the present invention provides following attached drawing:
The method flow diagram of Fig. 1 domestic garbage incineration flyash processing of the present invention.
Specific embodiment
A specific embodiment of the invention is described in detail below.The reality of actual conditions is not specified in embodiment
Proved recipe method, usually according to environmental protection correlation national standard and normal condition or the condition taken according to raw materials provider.
The preparation of 1 stabilization agent:
Stabilization agent is prepared according to formula as below,
Stabilization agent is formulated a: 10 parts of waterglass (modulus is 1~1.5) plus 1 part of sodium phosphate being taken to add 1~2 part of thiosulfuric acid
Sodium is mixed evenly.
Stabilization agent is formulated b: take 10 parts of waterglass (modulus is 1~1.5) plus 1 part of sodium phosphate to add 1~2 part of vulcanized sodium,
It is mixed evenly.
Stabilization agent is formulated c: 10 parts of waterglass (modulus is 1~1.5) plus 1 part of sodium phosphate being taken to add 1~2 part of active oxidation
Aluminium is mixed evenly.
Stabilization agent is formulated d: 10 parts of waterglass (modulus is 1~1.5) plus 1 part of sodium hydroxide being taken to add 1~2 part of phosphoric acid
Sodium is mixed evenly.
Stabilization agent is formulated e: 12 parts of waterglass (modulus is 1~1.5) plus 1.5 parts of sodium phosphates being taken to add 1~2 part of thio sulphur
Sour sodium, is mixed evenly.
Stabilization agent is formulated f: 10 parts of waterglass (modulus 1~1.5) plus 1 part of sodium hydroxide being taken to add 1~2 part of thiosulfuric acid
Sodium is mixed evenly.
2 techniques for carrying out flying dust processing using stabilization agent:
It takes 0.5~1g stabilizer a-f to be diluted in 40g-50g water, is then added in 100g flying dust after mixing and stirs 2
Minute or so, be transferred to after flying dust complete wetting in mold with not less than 30 beats/min frequency vibration until surface no longer
There is bubble to emerge, be then transferred to constant-temp. and-moisture maintenance maintenance, rear demoulding continuation conserves in constant-temp. and-moisture maintenance for 24 hours
13d-15d。
The heavy metals immobilization effect test of flying dust after 3 pairs of stabilization agent processing
Preferable effect is all achieved in laboratory pilot plant test and pilot process.The following are use stabilization agent e,
The mass ratio of medicament and flying dust is 1: 200, according to the heavy metals immobilization for the cured block that the process that above-mentioned flying dust is handled obtains
Experimental result.
From in above-mentioned data it is found that using stabilization agent handle, by maintenance after flyash curing block Leaching
It can achieve the correlation of Leaching Heavy Metals concentration in " household refuse landfill sites contamination control standard " (GB16889-2008)
Regulation, treatment effect are good.
At the same time, additive amount of medicament is few, flying dust not increase-volume after processing.Only by addition flying dust quality 5 ‰~10 ‰
Medicament, that is, can reach preferable effect.Since this medicament is aqua, except the water that consumption of chemical reaction occurs stays in admittedly after processing
Change in body, other Free waters are evaporate into air, not will increase the weight of flying dust after processing substantially.After treatment,
The bulk density of flying dust has 0.6~0.8g/cm3Become 1.5~1.8g/cm3, therefore the volume of flying dust not but not increase, can also
It reduces.
The above preferred embodiment is only used to illustrate the technical scheme of the present invention and not to limit it, and those skilled in the art exist
On the basis of aforesaid way be understood that, various changes are made to it in the form and details, without departing from this
Invention claims limited range, is within the scope of the present invention.
Claims (6)
1. a kind of processing method of garbage flying ash, which is characterized in that account for garbage flying ash according to stabilization agent during processing
The ratio that mass ratio is 4 ‰~12 ‰ is added in garbage flying ash, and the stabilization agent is according to mass fraction meter, by following substance
Composition:
9-13 parts of waterglass；
1-4 parts of sodium salt compound；
Wherein, sodium salt compound is sodium phosphate and non-sodium ascorbyl phosphate according to 1: 1-3 proportions, and non-sodium ascorbyl phosphate is selected from hydrogen
One of sodium oxide molybdena, vulcanized sodium, sodium thiosulfate, activated alumina are several.
2. processing method according to claim 1, which is characterized in that according to mass fraction meter, by following material composition:
10-12 parts of waterglass；
2-3 parts of sodium salt compound.
3. processing method according to claim 1, it is characterised in that: the modulus of water glass is 1-1.5.
4. processing method described in any one of -2 according to claim 1, which is characterized in that according to mass fraction meter, by following
Material composition:
10 parts of waterglass；
1 part of sodium phosphate；
Non- sodium ascorbyl phosphate 1-2 parts；
Non- sodium ascorbyl phosphate is selected from one of sodium hydroxide, vulcanized sodium, sodium thiosulfate, activated alumina or several.
5. a kind of method for handling garbage flying ash, which comprises the following steps:
(1) it takes fly ash from burning city domestic garbage dry and pre-processes；
(2) stabilization agent is stirred evenly by formula mixing；The stabilization agent formula are as follows:
According to mass fraction meter, by following material composition:
9-13 parts of waterglass；
1-4 parts of sodium salt compound；
Wherein, sodium salt compound is sodium phosphate and non-sodium ascorbyl phosphate according to 1: 1-3 proportions, and non-sodium ascorbyl phosphate is selected from hydrogen
One of sodium oxide molybdena, vulcanized sodium, sodium thiosulfate, activated alumina are several；
(3) stabilization agent and water obtained step (2) according to 1: 35-100 ratio mixed diluting；
(4) stabilization agent after dilution is added in flying dust according to the ratio that stabilization agent accounts for flying dust quality 4 ‰~12 ‰；
(5) after flying dust complete wetting, the flying dust after wetting is transferred in mold and is vibrated to that there is no bubbles to emerge；
(6) constant-temp. and-moisture maintenance maintenance, demoulding after 20-30h are transferred to；
(7) continue to conserve 12-15 days in constant-temp. and-moisture maintenance.
6. the method for processing garbage flying ash according to claim 5, it is characterised in that: press the stabilization agent after dilution
The ratio for accounting for flying dust quality 5 ‰~10 ‰ according to stabilization agent is added in flying dust.
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| CN201710484116.0A CN107137858B (en) | 2017-06-22 | 2017-06-22 | A kind of method garbage flying ash processing stabilization agent and flying dust is handled using it |
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| CN201710484116.0A CN107137858B (en) | 2017-06-22 | 2017-06-22 | A kind of method garbage flying ash processing stabilization agent and flying dust is handled using it |
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| CN107137858B true CN107137858B (en) | 2019-05-14 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109126011A (en) * | 2018-06-28 | 2019-01-04 | 内蒙古益兴环保工程有限公司 | Handle the medicament of flying ash |
| CN111018038A (en) * | 2019-12-26 | 2020-04-17 | 浙江伊诺环保科技股份有限公司 | Heavy metal trapping agent and preparation process thereof |
| CN112756376B (en) * | 2020-12-29 | 2022-05-10 | 常熟理工学院 | Synchronous calcium fixation dechlorination water washing method for waste incineration fly ash |
| CN113528857A (en) * | 2021-06-16 | 2021-10-22 | 福建常青新能源科技有限公司 | Continuous production method for recovering cobalt from cobalt-containing waste residues |
| CN113953304A (en) * | 2021-08-31 | 2022-01-21 | 江西盖亚环保科技有限公司 | Sustained-release stabilizing agent for treating fly ash and fly ash treatment method thereof |
| CN114160553B (en) * | 2021-10-25 | 2022-07-29 | 北京工业大学 | Method for improving mercury removal rate of household garbage incineration fly ash |
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| CN101049533A (en) * | 2007-04-25 | 2007-10-10 | 深圳市市政环卫综合处理厂 | Method for treating flying ash of burning garbage |
| CN106178385A (en) * | 2016-09-26 | 2016-12-07 | 重庆大学 | In one way of life incineration of refuse flyash heavy metal fix, stabilization method |
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| CN101049533A (en) * | 2007-04-25 | 2007-10-10 | 深圳市市政环卫综合处理厂 | Method for treating flying ash of burning garbage |
| CN106178385A (en) * | 2016-09-26 | 2016-12-07 | 重庆大学 | In one way of life incineration of refuse flyash heavy metal fix, stabilization method |
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