CN107137858A - A kind of garbage flying ash processing stabilization agent and the method that flying dust is handled using it - Google Patents
A kind of garbage flying ash processing stabilization agent and the method that flying dust is handled using it Download PDFInfo
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- CN107137858A CN107137858A CN201710484116.0A CN201710484116A CN107137858A CN 107137858 A CN107137858 A CN 107137858A CN 201710484116 A CN201710484116 A CN 201710484116A CN 107137858 A CN107137858 A CN 107137858A
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- sodium
- stabilization agent
- flying dust
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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
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Business, Economics & Management (AREA)
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- Processing Of Solid Wastes (AREA)
Abstract
The invention provides a kind of garbage flying ash processing stabilization agent, it is characterised in that according to mass fraction meter, by following material composition：9 13 parts of waterglass, 14 parts of compound containing sodium salt；Wherein compound containing sodium salt is the one or several kinds in sodium phosphate, sodium hydroxide, vulcanized sodium, sodium thiosulfate, activated alumina.Present invention also offers a kind of method that flying dust is handled using the stabilization agent.Composition and proportioning that the present invention passes through optimum choice stabilization agent, a certain proportion of compound containing sodium salt is mixed with waterglass, available for the dissociation of the active silica-alumina calcium system of exciting agent flying dust, gel is formed, secondary pollution is avoided, processing cost is low, efficiency high, stabilizing fly ash after 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 technology
At present, the main treatment technology of incineration of refuse flyash has：Cement solidification method, chemical agent are stabilized, melting and solidification
Method and cement kiln synergic processing method etc..
In terms of economy, ease for operation and utilization of area consider, cement solidification method be most suitable processing method it
One.External researcher using cement solidification method processing flying dust to having made many researchs, and this method is also external
For handling one of conventional method of flying dust.But increase-volume amount is big after cement solidification processing, and if contain obstruction water in flying dust
During the composition that mud normally condenses, can often occur firming body low intensity, the problems such as harmful substance leaching rate is high.Cement class curing materials
There are numerous species, typically used according to the characteristic of flying dust and processing requirement classification, its representational cement has ordinary cement and swollen
Swollen cement, is usually to be made up of sial and calcium oxide.Cement fixation is exactly that cement and flying dust are uniformly mixed with water, occurs water
Reaction is closed, is gradually hardened, poisonous metal is closed.In order to improve fixed effect, it is ensured that cement can effectively complete hydration reaction, have
When appropriate additive need to be added into mixture according to the species of flying dust.
The shortcoming of 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 produces certain influence, causes the treatment effect of flying dust unstable.Handle the increase-volume and weightening of solidify afterwards body
Substantially, the cost of disposal in later stage is added.
Chemical agent solidification is that heavy metal fixative and water are added in flying dust, is uniformly mixed to form insoluble compound,
So as to the method for fixed heavy metal.Heavy metal fixative has inorganic matter and the water solubilitys such as the iron of chlorination two, liquid aluminium sulfate, vulcanized sodium
Chelant macromolecule etc..These medicaments are either used alone or as a mixture, and can obtain preferable effect.Generally, due to flying dust tool
There is stronger alkalescence, the diafiltration of heavy metal is fewer, but lead is easily percolated in the basic conditions, so adding additive, adjust
Whole pH value, for preventing the diafiltration of lead from having preferable effect, when pH value is relatively low, addition macromolecule intercalating agent can prevent oozing for mercury
Filter.Hazardous waste is handled with medicament stabilization technology, can reach that waste reduces perhaps not while realizing that waste is innoxious
Increase-volume, so as to improve the overall efficiency and economy of hazardous waste processing disposal system.Meanwhile, can be by improving intercalating agent
Structure and performance make its chemical chelant 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 generally high
Molecule chelating agent, costly, and flying dust after treatment does not condense blocking to 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 greatly the bottom separation of smelting furnace because of density；Silicates
Residue is floated over above fused mass, and glass state material is formed after quenching, by the compact crystal structure of vitreum, it is ensured that heavy metal
It is stable, it can be used as building materials, volatile metal is then separated in flue dust.Melting and solidification method needs special melting furnace, its
The research and application of plasma smelting furnace are extremely noted, because there is plasma heating output energy to be easily controlled and adjust
Section, it is easy to operate, it is easy maximization, be readily available high temperature, melting atmosphere can by adjustment work gas componant to control the advantages of.
At the same time, fusion method high energy consumption, secondary pollution may be brought, it is necessary to high-temperature fusion process during high-temperature fusion
In flue gas carry out processing again.
Cement kiln synergic processing is a kind of new waste treatment means, and it refers to meet or met after pretreatment
Enter the solid waste input cement kiln of kiln requirement, the innoxious place to solid waste is realized while clinker production is carried out
Put process.Incineration of refuse flyash cement kiln synergic processing method can realize the innoxious and recycling of flying dust.
The content of the invention
In existing flying dust treatment technology, processing cost is higher, and increase-volume weightening is more apparent, and certain methods can also be brought secondary
Pollution, a series of problems that later stage cost of disposal is high, effect is unstable, based on this, can be used in flying the invention provides one kind
The stabilization agent of ash processing and the method that flying dust processing is carried out using the stabilization agent.
The stabilization agent composition that the present invention is used is as follows, and number described in formula is mass fraction：
9-13 parts of waterglass；
1-4 parts of compound containing sodium salt；
Wherein compound containing sodium salt be sodium phosphate, sodium hydroxide, vulcanized sodium, sodium thiosulfate, activated alumina in one kind or
Person is several.
It is preferred that, 10-12 parts of waterglass, 2-3 parts of compound containing sodium salt.
It is preferred that, compound containing sodium salt is that sodium phosphate and non-sodium ascorbyl phosphate are constituted according to 1: 1-3 ratio, non-sodium ascorbyl phosphate choosing
One or several kinds from sodium hydroxide, vulcanized sodium, sodium thiosulfate, activated alumina.
It is preferred that, modulus of water glass is 1-1.5.
It is preferred that, 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 the one or several kinds in sodium, sodium thiosulfate, activated alumina.
The cardinal principle of heavy metal has following two aspects in the stable flying dust of the stabilization agent：(1) it is stable by adding
Chemical drug agent excites the gelling property of flying dust, flying dust is occurred macadam effect, the heavy metal of part is coated, what is stabilized it deposits
It is in adhesive bond；(2) chemically reacted by the heavy metal in the chemical constituent and flying dust in stabilization agent, form ratio
Relatively stable compound is present in firming body.
Further, present invention also offers a kind of method for handling flying dust, comprise the following steps：
(1) fly ash from burning city domestic garbage is taken to dry and pre-process；
(2) stabilization agent for using the present invention is mixed by above-mentioned formula, is stirred；
(3) by stabilization agent and water according to 1: 35-100 ratio mixed diluting；
(4) ratio that the stabilization agent after dilution is accounted for into flying dust quality 4 ‰~12 ‰ according to stabilization agent is added in flying dust；
(5) emerged there is no bubble after after flying dust complete wetting, the flying dust after wetting being transferred to be vibrated in mould；
(6) it is transferred to form removal after constant-temp. and-moisture maintenance maintenance, 20-30h；
(7) continue to conserve 12-15 days in constant-temp. and-moisture maintenance.
It is preferred that, the ratio that the stabilization agent after dilution is accounted for into flying dust quality 5 ‰~10%0 according to stabilization agent adds
Enter in flying dust.
The beneficial effects of the present invention are：
(1) present invention contains sodium salt by the composition and proportioning of optimum choice stabilization agent so that waterglass mixing is a certain proportion of
Compound, available for the dissociation of the active silica-alumina calcium system of exciting agent flying dust, form gel, it is to avoid secondary pollution, processing
Cost is low, efficiency high, stabilizing fly ash after processing；
(2) incineration of refuse flyash is fixed in the curing process, technical process is simple, it is only necessary to by two weeks or so time
Curing just can be filled；
(3) stabilization agent of the invention is aqua, will not substantially increase the weight of flying dust after processing；
(4) treatment effeciency of stabilization agent of the present invention is very high, it is only necessary to can be real from the consumption of flying dust quality 4 ‰~12 ‰
Now to the fixation of heavy metal in flying dust.
Brief description of the drawings
In order that the purpose of the present invention, technical scheme and beneficial effect are clearer, the present invention provides drawings described below：
The method flow diagram of Fig. 1 domestic garbage incineration flyash processing of the present invention.
Embodiment
The embodiment to the present invention is described in detail below.The reality of unreceipted actual conditions in embodiment
Proved recipe method, the condition generally taken according to environmental protection related national standard and normal condition or 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 is taken to add 1~2 parts of sodium thiosulfate,
It is mixed evenly.
Stabilization agent is formulated b：10 parts of waterglass (modulus is 1~1.5) plus 1 part of sodium phosphate is taken to add 1~2 parts 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 is taken to add 1~2 parts of active oxidations
Aluminium, is mixed evenly.
Stabilization agent is formulated d：10 parts of waterglass (modulus is 1~1.5) plus 1 part of sodium hydroxide is taken to add 1~2 parts 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 are taken to add 1~2 parts 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 is taken to add 1~2 parts of thiosulfuric acids
Sodium, is mixed evenly.
2 techniques for carrying out flying dust processing using stabilization agent：
Take 0.5~1g stabilizers a-f to be diluted in 40g-50g water, be then added in 100g flying dusts and stir 2 minutes after being well mixed
Left and right, after be transferred to after flying dust complete wetting in mould be not less than 30 beats/min frequency vibrate up to surface, there is no gas
Bubble is emerged, and is then transferred to form removal after constant-temp. and-moisture maintenance maintenance, 24h and is continued to conserve 13d- in constant-temp. and-moisture maintenance
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.It is to use stabilization agent e, medicament below
Mass ratio with flying dust is 1: 200, and the heavy metals immobilization for the cured block that the PROCESS FOR TREATMENT handled according to above-mentioned flying dust is obtained is tested
As a result.
It was found from from above-mentioned data, handled using stabilization agent, the Leaching of flyash curing block after maintenance
It can reach《Household refuse landfill sites contamination control standard》(GB16889-2008) correlation of Leaching Heavy Metals concentration in
Regulation, treatment effect is 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, you can reach preferable effect.Because this medicament is aqua, except the water for occurring consumption of chemical reaction is stayed in admittedly after processing
Change in body, other Free waters are evaporate into air, will not substantially increase the weight of flying dust after processing.After treatment,
The bulk density of flying dust has 0.6~0.8g/cm3It is changed into 1.5~1.8g/cm3, therefore flying dust volume not but not increase, can also
Reduce.
Preferred embodiment it is merely illustrative of the technical solution of the present invention above and unrestricted, those skilled in the art exist
It may be appreciated on the basis of aforesaid way, make various changes to it in the form and details, without departing from this
Invention claims limited range, is within the scope of the present invention.
Claims (7)
1. a kind of garbage flying ash processing stabilization agent, it is characterised in that according to mass fraction meter, by following material composition：
9-13 parts of waterglass；
1-4 parts of compound containing sodium salt；
Wherein, compound containing sodium salt be sodium phosphate, sodium hydroxide, vulcanized sodium, sodium thiosulfate, activated alumina in one kind or
Person is several.
2. stabilization agent according to claim 1, it is characterised in that according to mass fraction meter, by following material composition：
10-12 parts of waterglass；
2-3 parts of compound containing sodium salt.
3. the stabilization agent according to any one of claim 1-2, it is characterised in that：The compound containing sodium salt is phosphorus
Sour sodium and non-sodium ascorbyl phosphate are according to 1:1-3 proportions, non-sodium ascorbyl phosphate be selected from sodium hydroxide, vulcanized sodium, sodium thiosulfate,
One or several kinds in activated alumina.
4. the stabilization agent according to any one of claim 1-2, it is characterised in that：The modulus of water glass is 1-
1.5。
5. the stabilization agent according to any one of claim 1-2, it is characterised in that according to mass fraction meter, by with
Lower material composition：
10 parts of waterglass；
1 part of sodium phosphate；
Non- sodium ascorbyl phosphate 1-2 parts；
One or several kinds of the non-sodium ascorbyl phosphate in sodium hydroxide, vulcanized sodium, sodium thiosulfate, activated alumina.
6. a kind of method for handling flying dust, it is characterised in that comprise the following steps：
（1）Fly ash from burning city domestic garbage is taken to dry and pre-process；
（2）One of the claims 1-5 stabilization agent is mixed by formula, stirred；
（3）By step（2）Obtained stabilization agent and water is according to 1:35-100 ratio mixed diluting；
（4）The ratio that the stabilization agent after dilution is accounted for into flying dust quality 4 ‰ ~ 12 ‰ according to stabilization agent is added in flying dust；
（5）Emerged after after flying dust complete wetting, the flying dust after wetting being transferred to be vibrated in mould there is no bubble；
（6）It is transferred to form removal after constant-temp. and-moisture maintenance maintenance, 20-30h；
（7）Continue to conserve 12-15 days in constant-temp. and-moisture maintenance.
7. the method for processing flying dust according to claim 6, it is characterised in that：By the stabilization agent after dilution according to steady
Determine chemical drug agent to account in the ratio addition flying dust of flying dust quality 5 ‰ ~ 10 ‰.
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| Application Number | Priority Date | Filing Date | Title |
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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 CN107137858B (en) | 2019-05-14 |
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Cited By (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 |
| CN112756376A (en) * | 2020-12-29 | 2021-05-07 | 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 |
| CN114160553A (en) * | 2021-10-25 | 2022-03-11 | 北京工业大学 | Method for improving mercury removal rate of household garbage incineration fly ash |
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Cited By (7)
| 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 |
| CN112756376A (en) * | 2020-12-29 | 2021-05-07 | 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 |
| CN114160553A (en) * | 2021-10-25 | 2022-03-11 | 北京工业大学 | Method for improving mercury removal rate of household garbage incineration fly ash |
| 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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| CN107137858B (en) | 2019-05-14 |
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