CN106734045A - A kind of domestic garbage incineration flyash wet method mould bag processing method and system - Google Patents
A kind of domestic garbage incineration flyash wet method mould bag processing method and system Download PDFInfo
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- CN106734045A CN106734045A CN201611233492.4A CN201611233492A CN106734045A CN 106734045 A CN106734045 A CN 106734045A CN 201611233492 A CN201611233492 A CN 201611233492A CN 106734045 A CN106734045 A CN 106734045A
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- flying dust
- mould bag
- bag
- mould
- domestic garbage
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B1/00—Dumping solid waste
-
- 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
- A62D2101/08—Toxic combustion residues, e.g. toxic substances contained in fly ash from waste incineration
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/30—Landfill technologies aiming to mitigate methane emissions
Abstract
The invention discloses a kind of domestic garbage incineration flyash wet method mould bag processing method, 3 links are consolidated by flying dust slurrying, flying dust slurry pipeline transport and flying dust slurry dewatering/aquation, flying dust homogenizing, heavy metal and dioxin removing toxic substances, desalination and the consolidation shaping of spontaneous aquation is realized fully and simultaneously；Flying dust in consolidation rear mold bag meets the requirement of concerned countries standard, the mould bag after consolidation can be carried out into landfill stabilization, it is also possible to which flying dust is taken out from mould bag carries out recycling；The liquid discharged from mould bag, carries out natural evaporation concentration, is reclaimed through heavy metal and dioxin and the utilization of filtering and impurity removing Posterior circle using landfill yard space, or further salt extraction Posterior circle is utilized.The invention also discloses a kind of domestic garbage incineration flyash mould bag method processing system.The present invention can avoid not enough present in flying dust conventional dry landfill and water-washing pre-treatment technology large-scale industrial application, it is capable of achieving flying dust homogenizing, removing toxic substances, desalination, spontaneous aquation consolidation, landfill integrated treatment, also for follow-up flying dust recycling is laid a good foundation, processing cost is low, can be applied to large-scale industrial production.
Description
Technical field
The invention belongs to solid waste treatment, disposal technology field, more particularly to a kind of domestic garbage incineration flyash is wet
Method mould bag processing method and system.
Background technology
Domestic garbage incineration flyash is the fine powder of a kind of canescence or Dark grey, low, general in rod with moisture content
The characteristics of irregular shape such as shape, many cutin shapes, flocculence, spherical, particle diameter inequality, porosity high and big specific surface area.Flying dust
Villaumite, high content rich in high concentration and easily leach heavy metal and dioxin, by countries in the world be classified as danger wastes (in
State, code is HW18).Therefore, flying dust has to pass through strict disposal before landfill and recycling.In recent years, both at home and abroad
The research of various flying dust disposal technologies is carried out, heat treatment and the charcoal/iron such as including solidification and stabilization, separating and extracting, sintered molten
Other methods such as slurry.But the disposal technology of heavy industrialization focuses primarily upon 2 kinds：Landfill stabilization and water after chelating agent stabilisation
Stall cooperative disposal or sintering ceramsite recycling.
Flying dust landfill stabilization, the general side using the shaping of powdery compacting, pressure ball, ton block or fragment of brick after chelating agent stabilisation
Formula, belongs to dry treatment.Flying dust dry method landfill stabilization there are problems that following：(1) flyash ingredient fluctuation is big, dry stirring
Preferably homo-effect can not be realized, chelating agent effect can not be played effectively, and consumption is difficult stability contorting, and detoxifying effect is unstable
It is fixed；Or in order to ensure chelate effect, excessive addition chelating agent, reagent cost increases；(2) a large amount of fine dusts are contained in flying dust,
Exposure easily forms the pollution sources of PM 2.5 in the environment, though conventional dry method landfill disposal has water spray humidification, cal rolling, preformation
The dust suppression measure such as type, but still the influence to landfill yard surrounding enviroment cannot be avoided；(3) it is often accompanied by pungent ammonia during new ash landfill
Taste, resident's is discontented easily near initiation, or even triggers social event；(4) due to the strength problem after stabilizing fly ash, it is only capable of
Using the space of below ground, the landfill stabilization in hole, it is impossible to using space more than ground, cause storage capacity utilization rate low；(5)
In summer and autumn rainy season, mud may be formed in waste pit so that landfill operation cannot be carried out；(6) unavoidably there is landfill yard to ooze
The process problem of filtrate, increases extra process cost.
Fly ash cement kiln synergic processing recycling aspect, due to containing high concentration chloride in flying dust, enters cement kiln association
Before with disposal, it is necessary to by water-washing pre-treatment.By washing, separation of solid and liquid, after washing flying dust removes most of villaumite and drying
Into cement kiln disposal；Wherein, the water washing effect and separation of solid and liquid of water-washing process are committed steps, domestic and international scientific worker
Substantial amounts of research work is done.101,773,924 102126837 B of B, CN of A, CN of Chinese patent literature CN 101182144,
CN 102173611 B、CN 105107820 A、CN 105080936 A、CN 105327927 A、CN 105481274 A、CN
The disclosed flying dust such as 105502977 A washing solid-liquid separation technique, focuses primarily upon plate compression, vacuum belt press filtration, horizontal
Centrifugal dehydration etc..Because CaO content is high, particle diameter is small in incineration of refuse flyash, good hydrophilic property bigger than table the characteristics of, plate compression
And occur filter cloth blocking and seriously corroded, solid-liquid separation effect difference during vacuum filter suction filtration and be unable to continuous and steady operation
Problem, cause separate after moisture content of the cake it is high, chlorion poor removal effect in flying dust, while disposing capacity is low；And it is horizontal from
Treatment of the heart dehydration equipment for fine fraction flying dust, it is also difficult to reach the effect of stabilization；Other washing equipment investment, floor space
And maintenance cost is larger.On the other hand, the characteristics of waste water after flying dust washing has pH high, heavy metal concentration high, villaumite high, by
It is high in pollutant load, forbid directly discharge；Current Normal practice is that the waste water after being washed to flying dust carries out medicament removal of impurities, wadding
After retrogradation is formed sediment, by supernatant evaporative crystallization salt extraction, clear liquid after salt extraction is used as washing grey water circulation use.The problem of presence is：Enter
The supernatant of evaporative crystallization did not do concentration, caused evaporative crystallization salt extraction process device to invest big, operating cost
It is high；If the supernatant concentration of evaporation and crystallization system will be entered by the way of natural evaporation, processing cost, technology are not expended substantially
It is upper feasible, but the method takes substantial amounts of soil, and the enforcement place of water-washing pre-treatment technology is general in cement plant, it is impossible in offer
Land area needed for clear liquid natural evaporation concentration, therefore actual implementation is infeasible；If villaumite therein not extracted
Direct circulation is utilized, then can save the cost of evaporative crystallization, but flying dust washing villaumite removal effect extreme difference, it is impossible to play flying dust water
Wash the effect of pretreatment.
Because flying dust conventional dry landfill has chelating high cost, dust pollution, ammonia taste dissipation, landfill storage capacity utilization rate
The deficiencies such as low, rainy season influence landfill operation, landfill yard filtration process, and flying dust water-washing pre-treatment technology should in large-scale industry
Exist in washing equipment fluctuation of service, washing desalination and solid-liquid separation effect is poor, occupation area of equipment and maintenance cost greatly,
The defect such as washing waste water processing cost is high, has had a strong impact on the economy and environmental protection characteristic of flying dust safe handling disposal technology.
Geotechnical fabric bag has the characteristic of permeable impermeable slurry, and in embankment, river regulation, basement process, mud disposal, mine tailing is built
There is engineer applied in the fields such as dam, and domestic and international scientific worker have also been made substantial amounts of research work.Publication No. CN 101486526
The method of B and the B patent proposition geotextile bags of CN 102367193 or filter bag landfill disposal sludge, Publication No. CN
101693590 B and the B patents of CN 102493397 propose using geotechnological cloth bag heavy metal polluted sludge process and in situ
Administer the method that landfill makes island resource；104912087 B and CN 105672318 of A, CN of Publication No. CN 102182193
A patents are proposed using mould bag and the method for carrying out milltailings heap dam；Disclosed in above-mentioned patent geotechnical fabric bag treatment sludge and
The method for carrying out tailing heap dam, merely with the fundamental characteristics of the conventional permeable impermeable slurry of geotechnical fabric bag, enters to sludge or mine tailing
Row dehydration volume reduction, and the process problem of geotechnical fabric bag discharge liquor is considered without emphasis.
Because municipal sludge, mine tailing etc. belong to general solid waste, and domestic garbage incineration flyash belongs to dangerous waste
Thing (China, code is HW18), if above-mentioned technology to be simply transplanted to the disposal field of domestic garbage incineration flyash, can produce
Raw problems with：(1) environmental issue：Waste residue, waste water produced in the product and disposal process that are postponed at dangerous waste etc. has strict
Standard requirement, have strict difference with the general solid waste such as sludge, mine tailing；(2) technical problem：1) sludge, mine tailing contain
Water 50~95%, belongs to water-containing materials, is processed using mould bag, it is only necessary to consider dehydration volume reduction problem；And flying dust aqueous 1~2%, category
In dry material, processed using mould bag, need to simultaneously consider slurrying and dewater treatment, and slurrying link to follow-up dehydrating effect
There is large effect, and require to complete harmlessness disposing of the flying dust as danger wastes in whole processing procedure；2) sludge
Or the mould bag used by fixed-end forces such as mine tailing, easily permeated by rainwater, the intensity of the interior sludge of influence mould bag or mine tailing induration.
Because flying dust conventional dry landfill and flying dust water-washing pre-treatment technology are above-mentioned present in large-scale industrial application
Defect and deficiency, and the simple disposal field for being transplanted to domestic garbage incineration flyash of mould bag will be caused into the side such as technology and environmental protection
The problem in face.Therefore, exploitation one kind can avoid being deposited in flying dust conventional dry landfill, flying dust water-washing pre-treatment skilled industry application
Deficiency, technical feasibility, environmental protection, investment and the low method and system of operating cost are harmless for domestic garbage incineration flyash
Change, minimizing, disposal of resources are significant.
The content of the invention
The present invention is carried to solve defect present in the known technologies such as flying dust dry method landfill, the common water-washing pre-treatment of flying dust
For a kind of domestic garbage incineration flyash wet method mould bag processing method and system, the method and system can be prevented effectively from flying dust tradition
It is not enough present in dry method landfill, flying dust water-washing pre-treatment skilled industry application, realize flying dust homogenizing, removing toxic substances, certainly desalination, shampoo
Chemical conversion type, landfill integrated treatment, also for follow-up flying dust recycling is laid a good foundation, processing cost is low, can apply
In large-scale industrial production.
The present invention is adopted the technical scheme that to solve technical problem present in known technology：A kind of house refuse is burnt
Flying dust wet method mould bag processing method is burnt, is comprised the following steps：
(1) flying dust slurrying：Flying dust and water are made according to weight ratio to be stirred in 1: 2~20 closed slurrying pond of ratio addition
Slurry, realizes flying dust homogenizing and washing desalination in advance；To being added in flying dust slurry, heavy metal is stable or extraction medicament, dioxin are carried simultaneously
Get it filled agent, realize that heavy metal and dioxin detoxify in advance；
The heavy metal stabilizer addition is the 0-3% of flying dust butt quality, and the heavy metal extracts additive amount of medicament
It is the 0-30% of flying dust butt quality, it is the 0-2% of flying dust butt quality that the dioxin extracts additive amount of medicament；
The heavy metal stabilizer is phosphate, sulfide, sulfydryl amine salt, EDTA connections aggressiveness, in polyphosphoric acids one
Plant or several combinations；
The heavy metal digestion agent, is hydrochloric acid, nitric acid, acetic acid, oxalic acid, NaOH, Na2CO3, EDTA, dimercaprol dimercaptopropanol, two
The combination of one or more in mercaptopropanesulfonic acid sodium；
The dioxin extractant is one or more in sulfonated kerosene, n-hexane, acetone, lauryl sodium sulfate
Combination；
The flying dust stirring pulping water, is the one kind or group in percolate RO concentrated waters, flying dust landfill percolate
Close；
(2) mould bag is modified：By mould bag outer surface spraying water repellent finishing agent be modified, water repellent finishing agent pH value of solution 2~
14 scopes can guarantee that the performance of normal performance；
(3) flying dust slurry pipeline transport：Flying dust slurry is through pipeline self or is pumped in modified mould bag, and flow-disturbing dress is provided with pipeline
Put, reinforcing flying dust homogenizing, desalination and removing toxic substances；
Disturbing flow device in the slurry conveying pipeline, is inner-walls of duct screw thread, circumferential equally distributed flat board or spiral
One kind in blade；
(4) flying dust slurry dewatering/aquation consolidation：Modified mould bag stands process full of standing 2~20 days after flying dust slurry
In, salt, heavy metal, dioxin in liquid phase discharge modified mould bag by drainage, into mould bag discharge liquor；In modified mould bag
Flying dust through spontaneous hydration reaction for a long time, excite activity itself solidify afterwards to be shaped to induration, intensity increases with time of repose
And constantly strengthen；
The mould bag, material is any one in polyethylene, polyvinyl chloride, polypropylene, polypropylene fibre, nylon or polyester；
(5) dehydration/aquation consolidation mould bag disposal：Flying dust in dehydration/aquation consolidation rear mold bag meets concerned countries
Standard requirement, the mould bag after dehydration/aquation consolidation carries out waste pit landfill or heap dam landfill, or flying dust is taken out from mould bag
Carry out recycling；
(6) mould bag discharge liquor treatment：After mould bag discharge liquor carries out natural evaporation concentration using landfill yard space, into liquid storage
Pond, the recovered heavy metal of liquid, dioxin and filtering and impurity removing Posterior circle in liquid storage tank are utilized, or further salt extraction Posterior circle
Utilize.
A kind of system using above-mentioned domestic garbage incineration flyash wet method mould bag processing method, including closed slurrying pond 2, material
Slurry conveyance conduit 3, modified mould bag 4, natural evaporation system 5, liquid storage tank 6 and discharge liquid treating system 7, the closed slurrying pond is entered
Mouth is connected with the outlet of flying dust transportation tank car 1, and the slurry conveying pipeline import is connected with the outlet of closed slurrying pond, and the slurry is defeated
Pipe outlet is sent to be connected with modified mould bag slurry inlet；The modified mould bag is provided with leakage fluid dram, and the leakage fluid dram passes through discharge liquor
Liquid collecting pipeline is connected with natural evaporation concentration systems import；The natural evaporation concentration systems outlet is connected with liquid storage tank import；
The liquid storage tank outlet is connected with discharge liquid treating system import, and discharge liquid treating system outlet passes through pipeline and closed slurrying pond
Import is connected.
The closed slurrying pond is provided with valve 10-1 and flowmeter 10-2 with the connecting pipe of flying dust transportation tank car；
Agitating device is provided with inside the closed slurrying pond；
The slurry conveying pipeline is provided with Pulp pump, the height fall between closed slurrying pond and modified mould bag, nothing
Method makes flying dust slurry pass through deadweight from flowing into when in modified mould bag, for by flying dust material pulp pumping to modified mould bag；
Disturbing flow device in the slurry conveying pipeline, is inner-walls of duct screw thread, circumferential equally distributed flat board or spiral
One kind in blade；
The liquid treating system of discharging is for discharge liquor filtering and impurity removing system 13, or discharge liquor filtering and impurity removing system and evaporation are tied
The combination of brilliant salt extraction system 14；
The discharge liquid treating system is provided with circulating pump 12-1, valve 12-2, stream with the connecting pipe in closed slurrying pond
Gauge 12-3, heavy metal stabilization or extraction medicament and dioxin extract medicament addition mouth 8 and new water supply mouth 9.
The discharge liquor filtering and impurity removing system, is the one kind in flocculation sedimentation tank, ceramic membrane, microfiltration membranes, NF membrane, RO films
Or several combinations
The evaporative crystallization salt extraction system, be function of mechanical steam recompression crystallization, multiple-effect evaporation crystallization in any one.
The present invention has the advantages and positive effects that：
(1) flying dust homogenizing, removing toxic substances, desalination, the shaping of spontaneous aquation, landfill integrated treatment are realized.
3 links are consolidated by flying dust slurrying, flying dust slurry pipeline transport and flying dust slurry dewatering/aquation, with simplified treatment
Operation, realizes fully and simultaneously flying dust homogenizing, removing toxic substances and desalination, solve identical/different batches flying dust property fluctuation it is big,
Processing procedure is changeable, the removing toxic substances of flying dust detoxification processes not thoroughly or additive amount of medicament big (present invention, can compared with conventional dry is filled
Heavy metal chelant addition cost 10~20% is reduced, while the dioxin pollution thing in flying dust can be extracted effectively), it is common fast
The speed washing problem that water consumption is big and desalting efficiency is low (present invention incorporates stirring washing, water logging, slow drainage procedure are stood,
Desalination is more abundant).
The present invention takes full advantage of the spontaneous hydration characteristics of flying dust by the way that technique is integrated, innovation, and flying dust is limited mould bag
In space, during water logging standing, it is more beneficial for that spontaneous hydration reaction occurs between flying dust solid phase particles, inspires volcanic ash
Activity, with reference to the slow drainage procedure of mould bag, without adding curing agent, you can realize the spontaneous cure shaping of flying dust, and solidification
Body intensity constantly strengthens as time of repose increases, and this technology characteristics is different from using solid wastes such as mould bag treatment sludge, mine tailings,
And better than existing flying dust slurry mechanical dehydration technology and flying dust addition curing agent curing molding technology.
Flying dust mould bag induration is both filled using existing waste pit, and using sky more than landfill area ground
Between heap dam landfill, with conventional dry fill compared with, storage capacity usage factor expand more than 1 times, equivalent to the disposal for reducing flying dust
Cost, and can greatly alleviate the nervous problem of urban land resource.Based on flying dust wet method mould bag treatment technology, using in existing rubbish
The mode on rubbish heap body periphery heap dam or flying dust waste pit ground heap dam, is alternatively arranged as current household refuse landfill sites or flying dust peace
The emergent dilatation means of full landfill yard, alleviate the problem of outlet of house refuse or flying dust in the short time.
(2) water repellent finishing agent is sprayed by mould bag outer surface, mould bag is modified, rainwater or mould bag discharge can be prevented
Liquid in bag flying dust wash away with infiltration, and make mould bag have self-cleaning function, be easy to remove mould bag surface plaster incrustation, drop
Draining resistance to mass tranfer between low mould bag surfaces externally and internally, accelerates the bleeding speed of water-in-bag point；Meanwhile, outside water inlet is eliminated to mould bag
The influence of block is inside consolidated, it is to avoid consolidated the water swelling again of block and asked with entering to split caused concretion body strength decline
Topic.
(3) using wet method mould bag flying dust is filled, no dust pollution, non-wastewater discharge, without ammonia taste dissipation；And can use
Percolate RO dopes substitute flying dust pulping water, save the cost of disposal of RO dopes；In addition, can also cooperative disposal flying dust landfill
The percolate of field, realizes flying dust landfill percolate zero-emission.
(4) flying dust is processed using wet method mould bag, it is de- by flying dust slurrying, flying dust slurry pipeline transport and flying dust slurry
Water/aquation consolidates 3 links, washing and water logging desalination is realized, without the large-scale precipitation in traditional flying dust water-washing pre-treatment technology
The equipment such as pond, separation of solid and liquid, equipment investment is low, floor space is small, substantially no maintenance cost, and is suitable for any grade type
Flying dust, be especially suitable for the current reluctant high CaO content of flying dust water-washing pre-treatment technology flying dust.
(5) it is of the invention while mould bag slow discharging consolidation, using the group such as landfill yard space and landfill yard geomembrane
Into impervious element natural evaporation concentration carried out to mould bag discharge liquor, not additionally extension process time, increase processing cost
Under the premise of, the total amount for the treatment of fluid is reduced, the solution concentration into evaporation and crystallization system is improved, the equipment for reducing subsequent evaporation crystallization
Investment and operating cost, solving cannot be in applications such as cement plants because natural evaporation concentration systems floor space is big
Problem.
(6) flying dust moisture content in dewatering and coagulating rear mold bag, dioxin, Leaching of Heavy Metals index meet《House refuse
Landfill yard Environmental capacity standard》(GB16889-2008) require, flying dust villaumite clearance 60~90%.
Brief description of the drawings
Fig. 1 is the system flow schematic diagram of domestic garbage incineration flyash wet method mould bag processing method.
Fig. 2 and Fig. 3 are discharge two kinds of schematic diagrames of processing mode of liquid treating system.
Fig. 4 is domestic garbage incineration flyash wet method mould bag processing system schematic diagram.
In figure：1 be flying dust transportation tank car, 2 be closed slurrying pond, 3 be slurry conveying pipeline, 4 be modified mould bag, 5 be from
Right evaporation concentration system, 6 be liquid storage tank, 7 be discharge liquid treating system, 8 be that heavy metal stabilization/extraction medicament and dioxin are extracted
Agent addition mouth, 9 be new pulping water supply port, 10 be flying dust flow control assembly, 11 be circulating pump, 12 be clear liquid flow control group
Part, 13 be discharge liquor filtering and impurity removing system, 14 be that evaporative crystallization salt extraction system, 10-1 are that valve, 10-2 are flying dust mass flows
Meter, 12-1 circulating pumps, 12-2 valves, 12-3 flowmeters
Specific embodiment
For the content of the invention of the invention, feature and effect can be further appreciated that, following examples are hereby enumerated, and coordinate accompanying drawing
Describe in detail as follows：
A kind of domestic garbage incineration flyash wet method mould bag processing method, comprises the following steps：
(1) flying dust slurrying：Flying dust and water are made according to weight ratio to be stirred in 1: 2~20 closed slurrying pond of ratio addition
Slurry, realizes flying dust homogenizing and washing desalination in advance；To being added in flying dust slurry, heavy metal is stable or extraction medicament, dioxin are carried simultaneously
Get it filled agent, realize that heavy metal and dioxin detoxify in advance；
(2) mould bag is modified：By mould bag outer surface spraying water repellent finishing agent be modified, water repellent finishing agent pH value of solution 2~
14 scopes can guarantee that the performance of normal performance
(3) flying dust slurry pipeline transport：Flying dust slurry is through pipeline self or is pumped in modified mould bag, and flow-disturbing dress is provided with pipeline
Put, reinforcing flying dust homogenizing, desalination and removing toxic substances；
(4) flying dust slurry dewatering/aquation consolidation：Modified mould bag stands process full of standing 2~20 days after flying dust slurry
In, salt, heavy metal, dioxin in liquid phase discharge modified mould bag by drainage, into mould bag discharge liquor；In modified mould bag
Flying dust through spontaneous hydration reaction for a long time, excite activity itself solidify afterwards to be shaped to induration, intensity increases with time of repose
And constantly strengthen；
(5) dehydration/aquation consolidation mould bag disposal：Flying dust in dehydration/aquation consolidation rear mold bag meets concerned countries
Standard requirement, the mould bag after dehydration/aquation consolidation carries out waste pit landfill or heap dam landfill, or flying dust is taken out from mould bag
Carry out recycling；
(6) mould bag discharge liquor treatment：After mould bag discharge liquor carries out natural evaporation concentration using landfill yard space, into liquid storage
Pond, the recovered heavy metal of liquid, dioxin and filtering and impurity removing Posterior circle in liquid storage tank are utilized, or further salt extraction Posterior circle
Utilize.
Embodiment 1：Flying dust and water stirring pulping ratio by mass compare 1: 5, water used be mould bag discharge liquor through discharge liquor at
The percolate RO dopes of recirculated water and part supplement in reason system after the treatment of discharge liquor filtering and impurity removing system, heavy metal
Stabilizer is the 1% of flying dust butt from sulfide inorganic chelator, addition, and dioxin extractant uses dodecyl sulphate
Sodium anion surfactant, addition are the 0.5% of flying dust butt, use the threaded slurry conveying pipeline of inwall to strengthen
Flying dust homogenizing, desalination and removing toxic substances, mould bag material use polyvinyl chloride, mould bag outer surface spraying water repellent finishing agent fluorine-containing organic silicon oxygen
Alkane is modified (can bring into normal play performance under the operating mode that mould bag discharge liquor pH is 12.5), and the mould bag that is modified is full of after flying dust slurry
6 days are stood, homogenizing, the flying dust innoxious, desalination of removing toxic substances and dehydration/aquation consolidation completely is realized.
Flying dust moisture content, dioxin in dehydration/aquation consolidation rear mold bag, Leaching of Heavy Metals index meet《Life rubbish
Rubbish landfill yard Environmental capacity standard》(GB16889-2008) require, wherein the flying dust moisture content in dehydration/aquation consolidation rear mold bag
The μ g TEQ/kg of ＜ 15%, dioxins concentration ＜ 0.5, Leaching of Heavy Metals is as shown in the table,
Table 1 is dehydrated/aquation consolidation rear mold bag in fly-ash heavy metal leaching concentration (unit：mg/L)
The salt rejection rate 80.5% of the flying dust in dehydration/aquation consolidation rear mold bag；Dehydration/aquation consolidates the landfill of rear mold bag
Position is flying dust security landfill or Sanitary Landfill, Zoning landfill, using waste pit landfill and rationally using ground
Space more than face carries out the mode of heap dam landfill, no dust pollution during landfill, non-wastewater discharge, without ammonia taste dissipation, with tradition
Dry method landfill is compared, and storage capacity usage factor expands 1.35 times, equivalent to the cost of disposal for reducing flying dust, can greatly alleviate city
The problem of shortage of land resource；And can 2~3m of cooperative disposal percolate RO dopes3/ t flying dusts.
Refer to Fig. 1 and Fig. 4, a kind of house refuse using above-mentioned domestic garbage incineration flyash wet method mould bag processing method
Flying ash wet method mould bag processing system, including closed slurrying pond 2, slurry conveying pipeline 3, modified mould bag 4, natural evaporation concentration
System 5, liquid storage tank 6 and discharge liquid treating system 7, the closed slurrying pond import is connected with the outlet of flying dust transportation tank car 1, described
Slurry conveying pipeline import is connected with the outlet of closed slurrying pond, and the slurry conveying pipeline outlet connects with modified mould bag slurry inlet
Connect；The modified mould bag is provided with leakage fluid dram, and the leakage fluid dram is by discharge liquor liquid collecting pipeline and natural evaporation concentration systems import
Connection；The natural evaporation concentration systems outlet is connected with liquid storage tank import；The liquid storage tank outlet and discharge liquid treating system
Import is connected, and discharge liquid treating system outlet is connected by pipeline with the import of closed slurrying pond.
Valve 10-1 and flowmeter 10-2 is provided with the connecting pipe of closed slurrying pond 2 and flying dust transportation tank car 1, it is closed
Slurrying is provided with agitating device inside pond；There is height fall 3m between closed slurrying pond and modified mould bag, can lead to flying dust slurry
Deadweight is crossed to flow into certainly in modified mould bag；Disturbing flow device in slurry conveying pipeline is inner-walls of duct screw thread；Mould bag discharge liquor is certainly
In right evaporation concentration system 5 by way of natural evaporation, concentration further concentrates 1 times or so, and liquid storage is pumped to by circulating pump
Behind pond 6, enter to discharge liquid treating system 7；Discharge liquid treating system 7 is provided with circulating pump 12- with the connecting pipe in closed slurrying pond 2
1st, valve 12-2, flowmeter 12-3, heavy metal stabilization or extraction medicament and dioxin extract medicament addition mouth 8 and new pulping water
Supply mouth 9.
Fig. 2 is referred to, the discharge liquid treating system 7 in above-mentioned domestic garbage incineration flyash wet method mould bag processing system is
Discharge liquor filtering and impurity removing system 13, using two grades of ceramic membranes+NF membrane combined system, heavy metal and two is carried out by mould bag discharge liquor
After disliking English recovery, directly as flying dust slurrying water circulation use.
Embodiment 2：Flying dust and water stirring pulping ratio by mass compare 1: 10, water used be mould bag discharge liquor through discharge liquor at
The new water of recirculated water and part supplement after discharge liquor filtering and impurity removing system and evaporative crystallization salt extraction system are processed in reason system,
Heavy metal digestion agent is the 8% of flying dust butt from pure acetic acid, addition, and it is winged that dioxin extractant uses acetone, addition
The 0.7% of grey butt, uses the slurry conveying pipeline of the circumferentially equally distributed helical blade of inner wall belt to strengthen flying dust homogenizing, take off
Salt and removing toxic substances, mould bag material use polypropylene, mould bag outer surface spraying water repellent finishing agent fluorine-containing organic silicon oxygen alkane be modified (
Mould bag discharge liquor pH be 5.5 operating mode under can bring into normal play performance), the mould bag that is modified has been realized full of standing 9 days after flying dust slurry
Full homogenizing, flying dust innoxious, the water logging desalination of removing toxic substances and dehydration/aquation consolidation.
Flying dust moisture content, dioxin in dehydration/aquation consolidation rear mold bag, Leaching of Heavy Metals index meet《Life rubbish
Rubbish landfill yard Environmental capacity standard》(GB16889-2008) require, wherein the flying dust moisture content in dehydration/aquation consolidation rear mold bag
The μ g TEQ/kg of ＜ 15%, dioxins concentration ＜ 0.5, Leaching of Heavy Metals is as shown in the table,
Table 2 is dehydrated/aquation consolidation rear mold bag in fly-ash heavy metal leaching concentration (unit：mg/L)
The salt rejection rate 95% of the flying dust in dehydration/aquation consolidation rear mold bag, the flying dust after desalination can carry out landfill stabilization
Recycling can also be carried out；The landfill position of dehydration/aquation consolidation rear mold bag is flying dust security landfill or life rubbish
Rubbish sanitary filling field, Zoning landfill, rationally carry out using waste pit landfill and using space more than ground the side of heap dam landfill
Formula, no dust pollution during landfill, non-wastewater discharge, without ammonia taste dissipation, compared with conventional dry is filled, storage capacity usage factor expands
1.35 times, equivalent to the cost of disposal for reducing flying dust, can greatly alleviate the nervous problem of urban land resource.Also can be by flying dust
Being taken out from mould bag carries out recycling, and recycling mode is high temperature sintering haydite, and ceramic product is used as roadbed material
Material etc..
Refer to Fig. 1 and Fig. 4, a kind of house refuse using above-mentioned domestic garbage incineration flyash wet method mould bag processing method
Flying ash wet method mould bag processing system, including closed slurrying pond 2, slurry conveying pipeline 3, modified mould bag 4, natural evaporation concentration
System 5, liquid storage tank 6 and discharge liquid treating system 7, the closed slurrying pond import is connected with the outlet of flying dust transportation tank car 1, described
Slurry conveying pipeline import is connected with the outlet of closed slurrying pond, and the slurry conveying pipeline outlet connects with modified mould bag slurry inlet
Connect；The modified mould bag is provided with leakage fluid dram, and the leakage fluid dram is by discharge liquor liquid collecting pipeline and natural evaporation concentration systems import
Connection；The natural evaporation concentration systems outlet is connected with liquid storage tank import；The liquid storage tank outlet and discharge liquid treating system
Import is connected, and discharge liquid treating system outlet is connected by pipeline with the import of closed slurrying pond.
Valve 10-1 and flowmeter 10-2 is provided with the connecting pipe of closed slurrying pond 2 and flying dust transportation tank car 1, it is closed
Slurrying is provided with agitating device inside pond；It is provided with without height fall, slurry conveying pipeline between closed slurrying pond and modified mould bag
Pulp pump, for by flying dust material pulp pumping to modified mould bag；Disturbing flow device in slurry conveying pipeline is inner-walls of duct circumference
Equally distributed helical blade；In natural evaporation concentration systems 5 by way of natural evaporation, concentration enters one to mould bag discharge liquor
1.2 times or so of step concentration, after being pumped to liquid storage tank 6 by circulating pump, enters to discharge liquid treating system 7；Discharge liquid treating system 7 with it is close
The connecting pipe for closing slurrying pond 2 is provided with circulating pump 12-1, valve 12-2, flowmeter 12-3, heavy metal stabilization or extraction medicament
Medicament addition mouth 8 and new pulping water supply mouth 9 are extracted with dioxin.
Fig. 3 is referred to, the discharge liquid treating system 7 in above-mentioned domestic garbage incineration flyash wet method mould bag processing system is
Discharge liquor filtering and impurity removing system 13 and evaporative crystallization salt extraction system 14, using two grades of ceramic membranes+NF membrane combined system, by mould bag
After discharge liquor carries out heavy metal and dioxin recovery, into evaporative crystallization salt extraction system 14, the clear liquid after treatment is used as flying dust system
Pulp-water is recycled.
The Main Function of above-mentioned modified mould bag 4 is：By the flying dust slurry from closed slurrying pond 2, by natural-dehydration or
Forced dehydration, independent or comprehensive dewatering type on the basis of flying dust slurrying and the washing desalination of flying dust slurry pipeline transport link, enters
Row stands water logging desalination, the villaumite in removing flying dust and progressively dehydration/aquation consolidation；Meanwhile, heavy metal stabilization/digestion agent,
In the presence of dioxin extractant, and on flying dust slurrying and flying dust slurry pipeline transport the link basis that removing toxic substances and reinforcing are detoxified in advance
On, the purpose of fly-ash heavy metal and dioxin removing toxic substances is reached, realize flying dust harmlessness disposing.Flying dust, can be same in modified mould bag 4
Shi Shixian flying dusts homogenizing, removing toxic substances, desalination, dehydration/aquation consolidation shaping；Mould bag after consolidation shaping can be in security landfill
Or sanitary filling field carries out landfill stabilization, it is also possible to which flying dust is taken out from mould bag carries out recycling.At above-mentioned discharge liquor
The Main Function of reason system 7 is flying dust slurrying Water Sproading, realizes wastewater zero discharge；Mould bag discharge liquor enters to discharge liquid treating system 7
Before, natural evaporation concentration is carried out using the space of landfill yard, investment and operating cost are not increased additionally, reduce discharge liquor and be processed into
This.
The discharge liquor treated by discharge liquor filtering and impurity removing system 13, during as flying dust slurrying water circulation use, dehydration/
Flying dust in aquation consolidation rear mold bag is suitably disposed by the way of landfill；By discharge liquor filtering and impurity removing system 13 and evaporation
The clear liquid that the Combined Treatment of crystallization salt extraction system 14 is crossed, when being utilized as flying dust slurrying recirculated water, dehydration/aquation consolidation rear mold bag
Interior flying dust with landfill stabilization or can carry out recycling.
Although being described to the preferred embodiments of the present invention above in conjunction with accompanying drawing, the invention is not limited in upper
The specific embodiment stated, above-mentioned specific embodiment is only schematical, be not it is restricted, this area it is common
Technical staff in the case of present inventive concept and scope of the claimed protection is not departed from, may be used also under enlightenment of the invention
To make many forms, these are belonged within protection scope of the present invention.
Claims (16)
1. a kind of domestic garbage incineration flyash wet method mould bag processing method, comprises the following steps：
(1) flying dust slurrying：It is stirring pulping in 1: 2~20 closed slurrying pond of ratio addition according to weight ratio by flying dust and water,
Realize flying dust homogenizing and washing desalination in advance；To being added in flying dust slurry, heavy metal is stable or extraction medicament, dioxin are extracted simultaneously
Medicament, realizes that heavy metal and dioxin detoxify in advance；
(2) mould bag is modified：Mould bag outer surface spraying water repellent finishing agent is modified, water repellent finishing agent is in the model of pH value of solution 2~14
Enclose the performance that can guarantee that normal performance；
(3) flying dust slurry pipeline transport：Flying dust slurry is through pipeline self or is pumped in modified mould bag, and disturbing flow device is provided with pipeline,
Reinforcing flying dust homogenizing, desalination and removing toxic substances；
(4) flying dust slurry dewatering/aquation consolidation：Modified mould bag is full of standing 2~20 days after flying dust slurry, during standing, liquid
Salt, heavy metal, dioxin in phase discharge modified mould bag by drainage, into mould bag discharge liquor；Flying in modified mould bag
Ash excites activity itself solidify afterwards to be shaped to induration through spontaneous hydration reaction for a long time, intensity with time of repose increase without
Disconnected enhancing；
(5) dehydration/aquation consolidation mould bag disposal：Flying dust in dehydration/aquation consolidation rear mold bag meets concerned countries standard
It is required that, the mould bag after dehydration/aquation consolidation carries out waste pit landfill or heap dam landfill, or flying dust is taken out and carried out from mould bag
Recycling；
(6) mould bag discharge liquor treatment：After mould bag discharge liquor carries out natural evaporation concentration using landfill yard space, into liquid storage tank,
The recovered heavy metal of liquid, dioxin and filtering and impurity removing Posterior circle in liquid storage tank are utilized, or further salt extraction Posterior circle profit
With.
2. domestic garbage incineration flyash wet method mould according to claim 1 bag processing method, it is characterised in that the huge sum of money
Category stabilizer addition is the 0-3% of flying dust butt quality, and the heavy metal extraction additive amount of medicament is flying dust butt quality
0-30%, it is the 0-2% of flying dust butt quality that the dioxin extracts additive amount of medicament.
3. domestic garbage incineration flyash wet method mould according to claim 1 bag processing method, it is characterised in that the huge sum of money
Category stabilizer is the one or more combination in phosphate, sulfide, sulfydryl amine salt, EDTA connections aggressiveness, polyphosphoric acids.
4. domestic garbage incineration flyash wet method mould according to claim 1 bag processing method, it is characterised in that the huge sum of money
Category digestion agent, is hydrochloric acid, nitric acid, acetic acid, oxalic acid, NaOH, Na2CO3, EDTA, dimercaprol dimercaptopropanol, in Sodium Dimercapto Sulfonate
The combination of one or more.
5. domestic garbage incineration flyash wet method mould according to claim 1 bag processing method, it is characterised in that described two dislike
English extractant is the combination of one or more in sulfonated kerosene, n-hexane, acetone, lauryl sodium sulfate.
6. domestic garbage incineration flyash wet method mould according to claim 1 bag processing method, it is characterised in that the mould
Bag, material is any one in polyethylene, polyvinyl chloride, polypropylene, polypropylene fibre, nylon or polyester.
7. domestic garbage incineration flyash wet method mould according to claim 1 bag processing method, it is characterised in that the flying dust
Stirring pulping water, is the one kind in percolate RO concentrated waters, flying dust landfill percolate or combination.
8. a kind of system using domestic garbage incineration flyash wet method mould as claimed in claim 1 bag processing method, its feature exists
In, including closed slurrying pond (2), slurry conveying pipeline (3), modified mould bag (4), natural evaporation concentration systems (5), liquid storage tank
(6) and discharge liquid treating system (7), the closed slurrying pond import and flying dust transportation tank car (1) are exported and are connected, and the slurry is defeated
Conduit entrance is sent to be connected with the outlet of closed slurrying pond, the slurry conveying pipeline outlet is connected with modified mould bag slurry inlet；Institute
State modified mould bag and be provided with leakage fluid dram, the leakage fluid dram is connected by discharge liquor liquid collecting pipeline with natural evaporation concentration systems import；
The natural evaporation concentration systems outlet is connected with liquid storage tank import；The liquid storage tank outlet connects with the import of discharge liquid treating system
Connect, discharge liquid treating system outlet is connected by pipeline with the import of closed slurrying pond.
9. domestic garbage incineration flyash wet method mould according to claim 8 bag processing system, it is characterised in that described close
Close slurrying pond and be provided with valve (10-1) and flowmeter (10-2) with the connecting pipe of flying dust transportation tank car.
10. domestic garbage incineration flyash wet method mould according to claim 8 bag processing system, it is characterised in that described close
Close inside slurrying pond and be provided with agitating device.
11. domestic garbage incineration flyash wet method mould bag processing systems according to claim 8, it is characterised in that the material
Slurry conveyance conduit is provided with Pulp pump, the height fall between closed slurrying pond and modified mould bag, it is impossible to lead to flying dust slurry
Deadweight is crossed from flowing into when in modified mould bag, for by flying dust material pulp pumping to modified mould bag.
12. domestic garbage incineration flyash wet method mould bag processing systems according to claim 8, it is characterised in that the material
Disturbing flow device in slurry conveyance conduit, is the one kind in inner-walls of duct screw thread, circumferential equally distributed flat board or helical blade.
13. domestic garbage incineration flyash wet method mould bag processing systems according to claim 8, it is characterised in that the row
Go out liquid treating system for discharge liquor filtering and impurity removing system (13), or discharge liquor filtering and impurity removing system and evaporative crystallization salt extraction system
(14) combination.
14. domestic garbage incineration flyash wet method mould bag processing systems according to claim 8, it is characterised in that described
Discharge liquid treating system is provided with circulating pump (12-1), valve (12-2), flowmeter (12- with the connecting pipe in closed slurrying pond
3), heavy metal stabilization or extraction medicament and dioxin extract medicament addition mouth (8) and new pulping water feeds mouth (9).
15. discharge liquid treating systems according to claim 13, it is characterised in that the discharge liquor filtering and impurity removing system,
It is the combination of one or more in flocculation sedimentation tank, ceramic membrane, microfiltration membranes, NF membrane, RO films.
16. discharge liquid treating systems according to claim 13, it is characterised in that the evaporative crystallization salt extraction system, be
Function of mechanical steam recompression crystallization, multiple-effect evaporation crystallization in any one.
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| CN106734045B (en) | 2022-08-02 |
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