CN108117350A - A kind of processing method of sludge and a kind of preparation method of bulk - Google Patents
A kind of processing method of sludge and a kind of preparation method of bulk Download PDFInfo
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- CN108117350A CN108117350A CN201711307513.7A CN201711307513A CN108117350A CN 108117350 A CN108117350 A CN 108117350A CN 201711307513 A CN201711307513 A CN 201711307513A CN 108117350 A CN108117350 A CN 108117350A
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- sludge
- recycled aggregate
- bulk
- present
- cementitious material
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- 239000010802 sludge Substances 0.000 title claims abstract description 133
- 238000002360 preparation method Methods 0.000 title claims abstract description 25
- 238000003672 processing method Methods 0.000 title claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 83
- 239000002002 slurry Substances 0.000 claims abstract description 68
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 53
- 230000008929 regeneration Effects 0.000 claims abstract description 18
- 238000011069 regeneration method Methods 0.000 claims abstract description 18
- 239000004567 concrete Substances 0.000 claims abstract description 16
- 239000011449 brick Substances 0.000 claims abstract description 14
- 239000004575 stone Substances 0.000 claims abstract description 13
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims description 41
- 230000008569 process Effects 0.000 claims description 32
- 239000002699 waste material Substances 0.000 claims description 32
- 239000000203 mixture Substances 0.000 claims description 27
- 239000004568 cement Substances 0.000 claims description 26
- 239000003795 chemical substances by application Substances 0.000 claims description 24
- 239000010881 fly ash Substances 0.000 claims description 23
- 239000000843 powder Substances 0.000 claims description 16
- 238000002156 mixing Methods 0.000 claims description 15
- 239000000654 additive Substances 0.000 claims description 10
- 230000000996 additive effect Effects 0.000 claims description 10
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 8
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 8
- 239000004571 lime Substances 0.000 claims description 8
- 239000002689 soil Substances 0.000 claims description 6
- 239000010883 coal ash Substances 0.000 claims description 3
- 239000002956 ash Substances 0.000 claims description 2
- 239000003245 coal Substances 0.000 claims 1
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 26
- 238000006703 hydration reaction Methods 0.000 abstract description 9
- 150000001875 compounds Chemical class 0.000 abstract description 6
- DNJIEGIFACGWOD-UHFFFAOYSA-N ethanethiol Chemical compound CCS DNJIEGIFACGWOD-UHFFFAOYSA-N 0.000 abstract description 3
- 229910021645 metal ion Inorganic materials 0.000 abstract description 3
- 238000002161 passivation Methods 0.000 abstract description 3
- 244000052769 pathogen Species 0.000 abstract description 3
- 230000001717 pathogenic effect Effects 0.000 abstract description 3
- 239000012615 aggregate Substances 0.000 description 97
- 239000011162 core material Substances 0.000 description 80
- 150000002500 ions Chemical class 0.000 description 16
- 230000006835 compression Effects 0.000 description 9
- 238000007906 compression Methods 0.000 description 9
- 238000000748 compression moulding Methods 0.000 description 9
- 238000001035 drying Methods 0.000 description 9
- 238000012545 processing Methods 0.000 description 9
- 239000010865 sewage Substances 0.000 description 9
- 239000000243 solution Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- -1 for example Substances 0.000 description 7
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 6
- 239000011398 Portland cement Substances 0.000 description 6
- 238000001125 extrusion Methods 0.000 description 6
- 238000012216 screening Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000012535 impurity Substances 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000003638 chemical reducing agent Substances 0.000 description 4
- 235000015110 jellies Nutrition 0.000 description 4
- 239000008274 jelly Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 206010059013 Nocturnal emission Diseases 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000000292 calcium oxide Substances 0.000 description 3
- 235000012255 calcium oxide Nutrition 0.000 description 3
- 239000003814 drug Substances 0.000 description 3
- 229940079593 drug Drugs 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 239000010801 sewage sludge Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000013019 agitation Methods 0.000 description 2
- 210000000988 bone and bone Anatomy 0.000 description 2
- 235000012241 calcium silicate Nutrition 0.000 description 2
- RRDQTXGFURAKDI-UHFFFAOYSA-N formaldehyde;naphthalene-2-sulfonic acid Chemical compound O=C.C1=CC=CC2=CC(S(=O)(=O)O)=CC=C21 RRDQTXGFURAKDI-UHFFFAOYSA-N 0.000 description 2
- 239000000499 gel Substances 0.000 description 2
- 230000002706 hydrostatic effect Effects 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical class O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 229910002975 Cd Pb Inorganic materials 0.000 description 1
- 102000002322 Egg Proteins Human genes 0.000 description 1
- 108010000912 Egg Proteins Proteins 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 239000007859 condensation product Substances 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 230000003467 diminishing effect Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910001653 ettringite Inorganic materials 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 239000003864 humus Substances 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 244000000010 microbial pathogen Species 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 230000003020 moisturizing effect Effects 0.000 description 1
- KVBGVZZKJNLNJU-UHFFFAOYSA-N naphthalene-2-sulfonic acid Chemical class C1=CC=CC2=CC(S(=O)(=O)O)=CC=C21 KVBGVZZKJNLNJU-UHFFFAOYSA-N 0.000 description 1
- DGVVJWXRCWCCOD-UHFFFAOYSA-N naphthalene;hydrate Chemical compound O.C1=CC=CC2=CC=CC=C21 DGVVJWXRCWCCOD-UHFFFAOYSA-N 0.000 description 1
- 150000002790 naphthalenes Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 210000004681 ovum Anatomy 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/10—Lime cements or magnesium oxide cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Treatment Of Sludge (AREA)
Abstract
The present invention provides a kind of processing methods of sludge, grain size≤16mm and moisture content are mixed into 30~10min for the recycled aggregate of the concrete of 1~5wt%, mortar, building stones or the material of brick with sludge, progress initial stage water suction, it is mixed again with alkaline cementitious material and water after being mixed with engineering dregs, obtains regeneration sludge slurry.Hydration reaction occurs for alkalescence cementitious material of the invention, discharges amount of heat, realizes the killing to pathogen in sludge, reduce the stench of sludge, the alkaline matter of hydration reaction generation simultaneously can be reacted with heavy metal ion, formed stable compound, realized the passivation to metal ion.The present invention also provides a kind of preparation methods of bulk, by the preparation of core, realize the curing for the first time to sludge, and the secondary curing realized to sludge, the heavy metal ion being effectively passivated in sludge are wrapped up in conjunction with outline border slurry；The bulk intensity being prepared is adjustable in the range of 5~50MPa, available for engineering field.
Description
Technical field
The invention belongs to the technical field of sewage sludge harmlessness processing more particularly to a kind of processing method of sludge and a kind of pieces
The preparation method of material.
Background technology
Sludge refers to the primary deposition sludge generated in sewage disposal process, residual active sludge, humus sludge, digestion
The river sludge and waterworks sludge, dewatered sludge that sludge and chemical sludge or industry, the unordered discharge of sanitary sewage are formed
Deng.Containing nutrient for plants nitrogen, phosphorus, potassium and organic matter and moisture etc. in sludge, also containing substantial amounts of poisonous and harmful substance, such as post
Infested ovum, pathogenic microorganism, bacterium, synthesis of organic substance and heavy metal ion；In addition, sludge is easy to degenerate smelly, particle is thinner,
Relative density is smaller, and moisture content is high and is not easy to be dehydrated, and belongs to the hydroaropic substance of colloid form structure, its arbitrary stacking can be caused two
Secondary pollution.
The processing method of sludge mainly has landfill method and Sludge resource utilization method at present.Landfill method is that one kind is dug with putting
Land-fill method is cheated, not only of high cost, waste land resource can also cause the huge waste of available resources.Recycling sludge profit
There is sludge to be carbonized mode with method is common, need to pass through catalysis oxidation broken wall, anaerobic oxidation, dehydration, drying and carbonization etc. some
Row technological process, method is cumbersome, limits the recycling of sludge.
The content of the invention
In view of this, the processing method it is an object of the invention to provide a kind of sludge and a kind of preparation method of bulk,
The recycling of the achievable sludge of the present invention, and it is easy to operate.
In order to realize foregoing invention purpose, the present invention provides following technical scheme：
The present invention provides a kind of processing methods of sludge, comprise the following steps：
(1) recycled aggregate of building waste is provided；Grain size≤16mm of the recycled aggregate, the moisture content of recycled aggregate are
1~5wt%；The building waste includes the one or more in concrete, mortar, building stones and the material of brick；
(2) stood after the recycled aggregate that the step (1) obtains is mixed with sludge, carry out initial stage water suction, obtain first
Mixture；The time of the mixing is 30s~10min；The time of the standing is 10min~2h；
(3) the first mixture that the step (2) obtains with engineering dregs is mixed, obtains the second mixture；
(4) the second mixture, alkaline cementitious material and the water mixing obtained the step (3), obtains regeneration sludge material
Slurry.
Preferably, the dosage of the recycled aggregate, sludge, engineering dregs and cementitious material is in terms of dry measure, the Regenerated Bone
The mass ratio of material and sludge is 1：(0.1~1.2)；
The recycled aggregate and the mass ratio of engineering dregs are 1：(0.1~1.2)；
The recycled aggregate and the mass ratio of cementitious material are 1：(0.1~1.2)；
The mass ratio of the recycled aggregate and water is 1：(0.1~1).
Preferably, the preparation method of recycled aggregate includes in the step (1)：The building waste is broken successively
Broken, screening, removal of impurities and drying, obtain recycled aggregate.
Preferably, the alkaline cementitious material includes cement, flyash and lime；The cement, flyash and lime
Mass ratio is 1：(0.5~6)：(0.5~10).
Preferably, sludge includes river sludge and/or waterworks sludge in the step (2).
Preferably, the moisture content of the engineering dregs is 1~90wt%.
Preferably, the addition of soil-solidified-agent is further included in the mixed process of the step (4), the soil-solidified-agent
Quality for recycled aggregate quality (0,20%].
The present invention also provides a kind of preparation methods of bulk, comprise the following steps：
(I) according to processing method described in preceding solution, regeneration sludge slurry is obtained；
The regeneration sludge slurry is subjected to forming processes, obtains core；
(II) recycled aggregate of building waste, cementitious material and water are mixed, obtains outline border slurry；The recycled aggregate
Grain size≤16mm, moisture content≤10wt% of recycled aggregate；The building waste is included in concrete, mortar, building stones and the material of brick
One or more；
The mass ratio of the recycled aggregate, cementitious material and water is 1:(0.05~1.05):(0.3~1.4)；The gelling
Material includes cement；
(III) after the outline border slurry that the step (II) obtains being wrapped to the core that at least 1 piece of step (I) obtains,
Forming processes are carried out, obtain bulk；
The compactness of the bulk is more than 75%；In the bulk core outer edge to each surface of bulk vertical range not
Less than 5mm；
The step (I) and step (II) do not have time order and function order.
Preferably, cementitious material further includes flyash and miberal powder, the cement, flyash and miberal powder in the step (II)
Mass ratio be [0.05,0.5]:(0,0.25]:(0,0.3].
Preferably, further included in the step (II) in the recycled aggregate of building waste, cementitious material and water mixed process
The mass ratio of the addition of additive, the recycled aggregate dry weight and additive is 1:(0,0.05].
The present invention provides a kind of processing method of sludge, by grain size≤16mm and building rubbish that moisture content is 1~5wt%
Rubbish recycled aggregate and sludge mixing 30s~10min, and 10min~2h is stood, initial stage water suction is carried out, then is mixed with engineering dregs
Afterwards, mixed with alkaline cementitious material and water, obtain regeneration sludge slurry.
In the present invention, the hydration reaction of alkaline cementitious material, generation alkalescence occur with water mixed process for alkaline cementitious material
Substance, and amount of heat can be discharged during hydration reaction, it realizes the killing to pathogen in sludge, inhibits micro- life in sludge
The activity of object effectively reduces the stench of sludge；Simultaneously hydration reaction generation alkaline matter can with the heavy metal in sludge from
Son and the heavy metal ion adsorbed in recycled aggregate hole are reacted, and are formed stable compound, are realized to metal ion
Passivation, without carrying out cumbersome processing to sludge, you can realize the secondary use of discarded object.
The present invention also provides a kind of preparation method of bulk, after obtaining regeneration sludge slurry according to preceding solution,
Core is obtained by forming processes；And it is 1 according to mass ratio:(0.05~1.05):(0.3~1.4) recycled aggregate, glue are configured
Gel material and water, are mixed, and obtain outline border slurry；After outline border slurry wraps at least 1 block of core, forming processes are carried out, are obtained
To bulk；The compactness of the bulk is more than 75%；In the bulk core outer edge to each surface of bulk vertical range not
Less than 5mm.The present invention is wrapped up in conjunction with outline border slurry and realized by core preparation process, realizing the curing for the first time to sludge
To the secondary curing of sludge, the heavy metal ion being effectively passivated in sludge；With the bulk intensity that this is prepared 5MPa~
Between 50Mpa, the requirement available for engineering field different directions.
Description of the drawings
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Monolithic structure schematic diagram is prepared for the present invention in Fig. 1；
Fig. 2 is the monolithic structure schematic diagram that the present invention is prepared；
Fig. 3 is the monolithic structure schematic diagram that the present invention is prepared；
Wherein, 1 is outline border, and 2 and 3 be core.
Specific embodiment
The present invention provides a kind of processing methods of sludge, comprise the following steps：
(1) recycled aggregate of building waste is provided；Grain size≤16mm of the recycled aggregate, the moisture content of recycled aggregate are
1~5wt%；The building waste includes the one or more in concrete, mortar, building stones and the material of brick；
(2) stood after the recycled aggregate that the step (1) obtains is mixed with sludge, carry out initial stage water suction, obtain first
Mixture；The time of the mixing is 30s~10min；The time of the standing is 10min~2h；
(3) the first mixture that the step (2) obtains with engineering dregs is mixed, obtains the second mixture；
(4) the second mixture, alkaline cementitious material and the water mixing obtained the step (3), obtains regeneration sludge material
Slurry.
The present invention provides the recycled aggregate of building waste, and the building waste includes concrete, mortar, building stones or the material of brick.
The present invention does not have particular/special requirement to the specific source of the building waste, using building trade well-known to those skilled in the art
The rubbish of generation.In the present invention, grain size≤16mm of the recycled aggregate, preferably≤10mm, further preferably≤
4.75mm。
In the present invention, the moisture content of the recycled aggregate is 1~5wt%, is preferably 1.5~4wt%, further preferably
For 2~3wt%.The present invention fully absorbs moisture in sludge using recycled aggregate realization, while realizes in sludge
The absorption of heavy metal ion so that in the hole of Heavy Metals in Sludge ion-transfer to recycled aggregate；Furthermore recycled aggregate plays
Skeleton function obtains higher intensity for bulk and provides condition, while realizes the utilization to discarded object again, cost-effective etc..
In the present invention, the preparation method of the recycled aggregate preferably comprises：The building waste is crushed successively,
Screening, removal of impurities and drying, obtain recycled aggregate；The present invention will be used as by broken, screening, removal of impurities and dried building waste
Recycled aggregate.In the present invention, described broken and screening specific embodiment does not have particular/special requirement, using people in the art
Known to member the particle of the recycled aggregate of target grain size can be obtained.It goes to clean present invention preferably employs dedoping step
Matter, the impurity are preferably the one or more in wooden unit, clothing, waste steel bar and pipeline.The present invention is to the tool of the drying
Body embodiment does not have particular/special requirement, uses drying mode well-known to those skilled in the art can obtain target moisture content
Recycled aggregate.
The present invention mixes recycled aggregate with sludge, carries out initial stage water suction, obtains the first mixture；The time of the mixing
For 30s~10min.In the present invention, the sludge preferably includes river sludge and/or waterworks sludge；The river sludge into
The river sludge that one step is preferably industrial wastewater or the unordered discharge of sanitary sewage is formed.The present invention preferably to the river sludge and
Waterworks sludge is carried out dehydrating, using dewatered sludge as pending mud；The moisture content of the dewatered sludge is excellent
Elect 40~60% as, further preferably 45~55%.The present invention does not have particular/special requirement to the dewatering type of the dewatered sludge,
Dewatering type well-known to those skilled in the art can be used.In the present invention, the dosage of the recycled aggregate and sludge
In terms of dry measure, the mass ratio of the recycled aggregate and sludge is preferably 1：(0.1~1.2), further preferably 1：(0.2~1),
More preferably 1：(0.5~0.8).
In the present invention, the moisture content of the sludge is preferably 5~95wt%, further preferably 10~80wt%, more
Preferably 30~70wt% is most preferably 40~50wt%.In the present invention, the time of the mixing is 30s~10min；Into
One step is preferably 30s~3min, can also be preferably 4~8min；More preferably 5~6min.
In the present invention, the mixing preferably carries out under agitation, and the present invention is to the specific embodiment party of the stirring
Formula does not have particular/special requirement, can realize coming into full contact with for the recycled aggregate and sludge.
The recycled aggregate and sludge mixed process are carried out initial stage water suction by the present invention, and recycled aggregate is realized to water in sludge
The absorption divided, while adsorb the heavy metal ion in sludge so that heavy metal ion is transferred in the hole of recycled aggregate.It is described
The sludge that the first mixture being mixed to get includes the recycled aggregate after water suction and is reproduced after aggregate water suction.
After obtaining the first mixture, the present invention mixes first mixture with engineering dregs, obtains the second mixture.
In the present invention, the moisture content of the engineering dregs is preferably 1~90wt%, further preferably 5~80wt%, more preferably
20~70wt% is most preferably 40~50wt%；The grain sizes of the engineering dregs preferably≤16mm, further preferably≤
10mm.In the present invention, the raw material of the engineering dregs preferably includes foundation pit spoir or foundation pit abandons stone；The present invention is to the engineering
The source of dregs raw material does not have particular/special requirement, using well-known to those skilled in the art.
The dosage of the engineering dregs is in terms of dry measure, recycled aggregate and engineering dregs in the first mixture preparation process
Mass ratio be preferably 1：(0.1~1.2), further preferably 1：(0.2~1), more preferably 1：(0.5~0.8).In this hair
In bright, the incorporation time of first mixture and engineering dregs is preferably 30s~5min, further preferably 1~4min, more
Preferably 2~3min.
The mixing preferably carries out under agitation；The mixed process so that the first mixture and engineering dregs are abundant
Mixing.The present invention mixes engineering dregs and the first mixture, helps to increase the compression effectiveness of sludge, and intensifying regenerating bone
The invigoration effect of material can utilize building waste again while improving core intensity.
After obtaining the second mixture, the present invention mixes second mixture, alkaline cementitious material and water, is regenerated
Sludge slurry.In the present invention, the alkaline cementitious material preferably includes cement, flyash and lime；The cement, flyash
Mass ratio with lime is preferably 1：(0.5~6)：(0.5~10), further preferably 1：(1~4)：(1~8), more preferably
1：(2~3)：(3~6).The present invention does not have particular/special requirement to the specific source of the cement, flyash and lime, using ability
Commercial goods known to field technique personnel.In an embodiment of the present invention, the cement is specially 32.5 common silicic acid
Salt cement or 42.5 Portland cements；The flyash is specially II grades of flyash；The lime is specially II grades of raw stones
Ash.
The present invention will in second mixture, alkaline cementitious material and water mixed process, the alkaline cementitious material
Dosage is counted on the basis of the dosage of recycled aggregate, and the mass ratio of the dry weight of the recycled aggregate and alkaline cementitious material is preferably 1：
(0.1~1.2), further preferably 1：(0.2~1.0), more preferably 1：(0.5~0.6)；The dry weight of the recycled aggregate and
The mass ratio of water is preferably 1：(0.1~1), further preferably 1：(0.2~0.8), more preferably 1：(0.4~0.7), it is optimal
Elect 1 as：(0.5~0.6).
In the present invention, the hydration reaction of alkaline cementitious material occurs with water mixed process for the alkaline cementitious material, raw
Into alkaline matter, the alkaline matter generated has calcium hydroxide etc., and can discharge amount of heat during hydration reaction, realizes
Killing to pathogen in sludge inhibits the activity of microorganism in sludge, effectively reduces the stench of sludge, while hydration reaction is given birth to
Into calcium silicates, entringite and alkaline matter can with the heavy metal ion in sludge and absorption in recycled aggregate hole
Heavy metal ion is reacted, and is formed stable compound, is realized the passivation to metal ion；And with the water of alkaline cementitious material
Change the continuous progress of reaction, the water in the first mixture in recycled aggregate constantly to external migration, promotes alkaline cementitious material
Further aquation；The reaction product of the alkaline continuous hydration reaction generation of cementitious material and the water constantly removed in recycled aggregate hole
Heavy metal ion reaction in point, in the stable compound that recycled aggregate surface is formed, recycled aggregate surface is because of the stabilization of formation
Compound changes recycled aggregate interface, recycled aggregate is made to be cohered with alkaline cementitious material more secured.
In the present invention, soil is preferably further included in second mixture, alkaline cementitious material and water mixed process to consolidate
The addition of agent；The soil-solidified-agent is preferably that commercial goods soil controlling nocturnal emission with astringent drugs Toogood, ISS soil-solidified-agent, WH type soil are consolidated
Agent or the EN-1 soil-solidified-agents in the U.S..
In the present invention, the soil-solidified-agent for recycled aggregate dry weight (0,20%], further preferably [1%,
15%].In the present invention, after the soil-solidified-agent is mixed with soil, it is inaccessiable that slurry is easy to be compacted reach routinely institute
Percent consolidation.
The present invention also provides a kind of preparation methods of bulk, comprise the following steps：
(I) according to processing method described in preceding solution, regeneration sludge slurry is obtained；
The regeneration sludge slurry is subjected to forming processes, obtains core；
(II) recycled aggregate, gel rubber material and water of building waste are mixed, obtains outline border slurry；The recycled aggregate
Grain size≤16mm, the moisture content of recycled aggregate is 1~5wt%；The building waste includes concrete, mortar, building stones and the material of brick
In one or more；
The mass ratio of the recycled aggregate, cementitious material and water is 1:(0.05~1.05):(0.3~1.4)；The gelling
Material includes cement, flyash and miberal powder, and the mass ratio of the cement, flyash and miberal powder is [0.05,0.5]:[0,0.25]:
[0,0.3]；
(III) the outline border slurry that the step (II) obtains is wrapped into the core that at least 1 piece of step (I) obtains
Afterwards, forming processes are carried out, obtain bulk；
The compactness of the bulk is more than 75%；In the bulk core outer edge to each surface of bulk vertical range not
Less than 5mm；
The step (I) and step (II) do not have time order and function order.
The present invention obtains regeneration sludge slurry according to processing method described in preceding solution.
After obtaining regeneration sludge slurry, the regeneration sludge slurry is carried out forming processes by the present invention, obtains core.At this
In invention, the compactness of the core is preferably greater than 75%, further preferably greater than 80%, more preferably 85~98%.
In the present invention, the forming processes are preferably to vibrate extrusion forming or hydrostatic profile；The present invention to it is described vibration extrusion forming and
The specific embodiment of hydrostatic profile does not have particular/special requirement, and use is well-known to those skilled in the art, close can reach target
The core of solidity.The present invention does not have particular/special requirement to the size of the core, can be shaped to any required size.
In an embodiment of the present invention, the core is preferably cylinder or prism.
The present invention mixes the recycled aggregate of building waste, cementitious material and water, obtains outline border slurry.In the present invention,
The mass ratio of the recycled aggregate, cementitious material and water is 1:(0.05~1.05):(0.3~1.4) is preferably 1:(0.05~
0.5):(0.5~1.0), further preferably 1:(0.25~0.3):(0.6~0.8).In the present invention, the cementitious material
Include cement；The present invention does not have particular/special requirement to the source of the cement, using cement city well-known to those skilled in the art
Sell commodity；In an embodiment of the present invention, the cement is specially 32.5 Portland cements or 42.5 common silicic acid
Salt cement.In the present invention, cementitious material used in the outline border slurry preparation process preferably further includes flyash and miberal powder.Work as institute
When stating the cementitious material in outline border slurry preparation process and containing cement, flyash and miberal powder, the cement, flyash and miberal powder
For relative usage in terms of dry weight, the mass ratio of the cement, flyash and miberal powder is [0.05,0.5]:(0,0.25]:(0,0.3],
Preferably [0.05,0.5]:[0.05,0.2]:[0.05,0.2], further preferably [0.25,0.35]:[0.1,0.15]:
[0.1,0.15].The present invention does not have particular/special requirement to the specific source of the flyash and miberal powder, using those skilled in the art
Known commercial goods.In an embodiment of the present invention, the flyash is specially II grade of flyash；The miberal powder tool
Body is S95 grades of miberal powders.
In the present invention, the building waste includes the one or more in concrete, mortar, building stones and the material of brick.This hair
The bright specific source to the building waste does not have particular/special requirement, is generated using building trade well-known to those skilled in the art
Rubbish.In the present invention, grain size≤16mm of the recycled aggregate, preferably≤10mm, further preferably≤4.75mm；
When the present invention prepares large scale bulk, the large-size recycled aggregate needed for selection in particle size range；When preparing small size bulk,
Reduced size recycled aggregate needed for selection in particle size range not only contributes to improve bulk intensity, additionally aids and meet bulk
Appearance requirement reduces cost.In the present invention, moisture content≤10wt% of the recycled aggregate is preferably 1.5~8wt%, into
One step is preferably 5~6wt%.
In the present invention, the preparation method of the recycled aggregate preferably comprises：The building waste is crushed successively,
Screening, removal of impurities and drying, obtain recycled aggregate.In the present invention, described broken and screening specific embodiment is not special
It is required that it uses well-known to those skilled in the art the particle of the recycled aggregate of target grain size can be obtained.The present invention is excellent
Choosing is using the substance in dedoping step removal building waste in addition to concrete, mortar, building stones and the material of brick, for example, plastics, wood
Material, clothing or metal.
The present invention does not have particular/special requirement to the specific embodiment of the drying, and use is well-known to those skilled in the art
Drying mode is can obtain the recycled aggregate of target moisture content.
In the present invention, the recycled aggregate, cementitious material and water are mixed with during outline border slurry, are preferably further included
The addition of additive, the additive are preferably naphthalene series high-efficiency water-reducing agent, further preferably high performance water reducing agent of polyocarboxy acid.
The present invention does not have particular/special requirement to the specific source of the additive, using phase well-known to those skilled in the art
Answer commercial goods.In the present invention, the mass ratio of the recycled aggregate dry weight and additive is preferably 1:(0,0.05], into
One step is preferably 1:[0.02,0.03]；The additive provides in form of an aqueous solutions；The concentration of the additive aqueous solution is excellent
Elect 20~30wt% as.
After obtaining outline border slurry and core, after outline border slurry is wrapped at least 1 block of core by the present invention, it is molded
Processing, obtains bulk.In the present invention, in the bulk core outer edge to the vertical range >=5mm on each surface of bulk；Into one
Step is preferably 8~100mm, more preferably 10~80mm, is most preferably 40~60mm.In the present invention, the forming processes are excellent
Elect compression moulding as；The present invention is in encapsulation process, and the outline border slurry is in the bag of the core with compression moulding direction vertical plane
Wrap up in thickness preferably >=10mm, further preferably 16~80mm, more preferably 20~50mm, be most preferably 20~40mm；It is described
Outline border slurry total laying depth >=10mm on compression moulding direction, further preferably 16~80mm, more preferably 20~
50mm is most preferably 20~40mm；The non-vertical planes in compression moulding direction core Jacket thickness preferably >=5mm, into one
Step is preferably 8~100mm, more preferably 10~80mm, is most preferably 40~60mm.
The present invention strictly controls the outline border slurry in the Jacket thickness of core surfaces, it is ensured that in obtained bulk outside core
The vertical range on edge to each surface of bulk is not less than 5mm, further realizes the curing to Heavy Metals in Sludge ion.The present invention
During compression moulding, the Jacket thickness for being pressed the outline border slurry in direction decreases, with reference to the control of bulk compactness,
The vertical range on core outer edge to each surface of bulk is not less than 5mm in the bulk ensured；Compression moulding direction it is parallel
The repressed forming processes of Jacket thickness of the outline border slurry in face, Jacket thickness are not exposed to influence.In the present invention, outline border slurry
Through forming processes, as the outline border of bulk, outline border effectively protects core from the effect of external environment, has bulk better
Endurance quality.Furthermore when core has heavy metal ion spilling, the heavy metal ion and the hydrated product of outline border inner wall overflowed
In strong base substance reaction, generation indissoluble substance be formed after outline border package, reach cured effect.Secondly, heavy metal from
Son can generate stable compound, so as to reach with the reactions such as hydrated calcium silicate, the ettringite in the hydrated product in outline border
The effect of further curing heavy metal ion.
The present invention does not have particular/special requirement to the relative usage of the outline border slurry and core, is reached with that can meet outline border slurry
Package requirement to core.In the present invention, the outline border slurry at least wraps 1 block of core；When package polylith core
When, the shape of different cores may be the same or different；Clear distance in the same bulk of the present invention between different cores preferably >=
5mm, further preferably 6~20mm.
In the present invention, the core quantity of the outline border slurry package is preferably 2~5 pieces.
In the present invention, it is described outer when by the way of being pressed using slurry laying depth direction in a mold
Frame slurry is preferably to the package mode of core：After being laid with one layer of outline border slurry in mold slots, the core is put into
In mold slots, then pass through the full mold slots of outline border slurry filling.In the present invention, bottom surface be laid with outline border slurry thickness preferably >=
10mm, further preferably 16~80mm, more preferably 20~50mm are most preferably 20~40mm.Complete the bottom of outline border slurry
After face is laid with, the core is preferably put into mold slots by the present invention, then fills full mold slots by outline border slurry.In the present invention
In, in the core placement process, distance >=5mm of each Edge Distance mold groove edge of core, further preferably 8~
100mm, more preferably 10~80mm are most preferably 40~60mm.When placing different cores, the clear distance of different cores is preferred
>=5mm, further preferably 6~20mm present invention does not have particular/special requirement to the size of the mold slots, using required for correspondence
The mold slots of size bulk.After core is put into mold slots, the present invention preferably fills full mold slots by outline border slurry, into
One step is preferably that outline border slurry is filled core and the gap in outline border, and outline border slurry is covered in core surfaces formation and is covered
Cap rock when there is multiple cores, also needs to fill outline border slurry into the gap between different cores；The thickness of the coating preferably >=
10mm, further preferably 16~80mm, more preferably 20~50mm are most preferably 20~40mm.
After completing the package, the core for being coated with outline border slurry is carried out forming processes by the present invention, obtains bulk.
In the present invention, the forming processes are preferably to vibrate extrusion forming.In the present invention, the core after the vibration extrusion forming
Compactness it is preferred>75%, further preferably >=80%, more preferably >=90%；The present invention is to the tool for extrusion forming
Body embodiment does not have particular/special requirement, can obtain meeting the core of compactness requirement.
When by the way of being pressed using slurry laying depth direction in a mold, the present invention preferably completes described
After the package of outline border slurry, processing is pressed in outline border slurry laying depth direction.
After the forming processes, the bulk after the shaping is preferably carried out maintenance processing by the present invention, obtains some strength
Bulk.The present invention does not have particular/special requirement to the specific embodiment of the maintenance, and use is well-known to those skilled in the art
Concrete curing mode.In the present invention, the maintenance preferably includes moisture-keeping maintaining and natural curing successively；The moisturizing
Humidity >=90% of maintenance；The time of moisture-keeping maintaining is preferably 3 days.
The bulk that the present invention is prepared preferably includes at least 1 block of core and is coated on the outline border of the core surfaces, institute
Outline border is stated to be molded to obtain by outline border slurry.In the present invention, in the bulk core outer edge to each surface of bulk it is vertical away from
It is most preferably 40~60mm from >=5mm, further preferably 8~100mm, more preferably 10~80mm.In the present invention, institute
It is preferably 2~5 pieces to state wrapped core, further preferably 3 pieces or 4 pieces；The size of different cores can be in same bulk
It is identical can not also be same.In the present invention, the clear distance in same bulk between different cores preferably >=5mm, further preferably >=
10mm.As a preferred embodiment of the present invention, as shown in Figure 1, the bulk that the present invention is prepared include outline border 1, cube
The core 2 of shape.As another preferred embodiment of the present invention, as shown in Fig. 2, the bulk that the present invention is prepared includes outline border
1 and the core 3 of cylindricality.As another preferred embodiment of the present invention, as shown in figure 3, the bulk bag that the present invention is prepared
Include the core 3 of outline border 1, cuboidal core 2 and cylindricality.
In the present invention, the preferred MPa10 of the compression strength of the bulk, the compression strength be preferably 10MPa~
40MPa, further preferably 15~30MPa, can meet requirement of the engineering different field to intensity.
Bulk is preferably applied to engineering field by the present invention, is further preferably used as building with brick or structure brick.
The bulk is further preferably used for masonry panel by the present invention；The present invention does not have the masonry way of the wall special want
It asks, using mode well-known to those skilled in the art；The present invention can also further preferably spread the bulk
If road surface；The present invention does not have particular/special requirement to the paving mode on the road surface, using mode well-known to those skilled in the art
.
With reference to embodiment to the processing method of sludge provided by the invention a kind of and a kind of preparation method of bulk into
Row detailed description, but they cannot be interpreted as limiting the scope of the present invention.
Embodiment 1
Preparation compression strength is 10Mpa, and the size of length is respectively the bulk of 240mm, 115mm, 53mm, core
The size of material length is respectively the single bulk of 200mm, 80mm, 30mm, and structure diagram is as shown in Figure 1.
Regeneration sludge slurry：
After building waste pulverization process, the recycled aggregate of grain size≤16mm is obtained, then processing is dried, is obtained aqueous
Rate is the recycled aggregate of 2wt%, and the recycled aggregate of gained meets《Concrete regenerated coarse aggregate》25177 Hes of GB/T《Concrete
With mortar recycled fine aggregate》III class requirement in GB/T 25176, it is spare.
It is recycled aggregate according to mass ratio：Engineering dregs：Sludge：Alkaline cementitious material：Water：Soil-solidified-agent is 1：0.5：
0.6：0.5：0.2：0.005 weighs recycled aggregate, engineering dregs, sludge, alkaline cementitious material, water and soil-solidified-agent.Wherein,
Recycled aggregate, engineering dregs, sludge, alkaline cementitious material are based on dry mass, and water, soil-solidified-agent are in terms of solution quality.Sludge
Moisture content is 60wt%, and sludge is riverfront sewage plant sludge, and Heavy Metal Level In Sludge is as shown in table 1；Engineering dregs moisture content
For 15wt%；Soil-solidified-agent be ISS soil-solidified-agents, concentration 20wt%；Alkaline cementitious material is by 32.5 normal silicates
Cement, II grade of flyash and II grade of quick lime composition, dry weight ratio are 1：1：2.
To be uniformly mixed after recycled aggregate and sludge mixing 10min with engineering dregs, then with alkaline cementitious material, water and soil
Earth curing agent mixing 5min, obtains regeneration sludge slurry, realizes the processing to sludge.
Outline border slurry：
After building waste pulverization process, the recycled aggregate of grain size≤16mm is obtained, then processing is dried, is obtained aqueous
Rate is the recycled aggregate of 5wt%, and the recycled aggregate of gained meets《Concrete regenerated coarse aggregate》25177 Hes of GB/T《Concrete
With mortar recycled fine aggregate》The requirement of the III class recycled aggregate of GB/T 25176, it is spare.
According to recycled aggregate：Cementitious material：Water：Beta-naphthalenesulfonic-acid salt formaldehyde condensate solution mass ratio 1：0.15：0.1：
0.005 weighs spare recycled aggregate, cementitious material, water and beta-naphthalenesulfonic-acid salt formaldehyde condensate solution, beta-naphthalenesulfonic-acid salt formaldehyde
The mass concentration of condensation product aqueous solution is 20wt%；Cementitious material used in outline border is by 32.5 Portland cements, II grade of fine coal
Ash and S95 grades of miberal powders form, and dry weight ratio is 1：0.1：0.2.
By spare recycled aggregate, cementitious material, water and naphthalene water reducer mixing 3min, outline border slurry is obtained.Again by shaking
Dynamic compression moulding obtains the bulk that compactness is 76%.
The bottom that laying depth is 15mm in outer frame mould by outline border slurry, the length for then obtaining shaping
Size is put into mold for 200mm × 80mm × 30mm cores, with mold control core length and width direction apart from mold groove edge away from
From wherein length direction core is filled out away from outline border inner wall 20mm, width core away from outline border inner wall 17.5mm, then with outline border slurry
Full outer frame mould；
Finally by vibration extrusion forming mode, the bulk that compactness is 76% is obtained, conserves to 28d and obtains compression strength
For the bulk of 10MPa.
The intensity of bulk to being prepared is tested, and compression strength reaches 10MPa, and dry shrink is less than 0.050%,
Mass loss rate is less than 1.5% after frost resistance is frozen.
Obtained bulk be can be used for into the masonry projects such as sewer, pipe trench or enclosure wall；The dry contraction of obtained bulk
Less than 0.05%, mass loss rate is less than 1.5% after frost resistance reaches jelly.
Embodiment 2
Preparation compression strength is 20Mpa, and the size of length is respectively the bulk of 390mm, 190mm, 190mm, wherein,
A diameter of 100mm of cylindricality core is highly 120mm, the size of the length of another core be respectively 200mm, 60mm,
130mm；Core is two, and clear distance is 6mm between core, and structure diagram is as shown in Figure 3.
Core matches：Mass ratio 1：0.6：0.5：0.7：0.3：0.008 weighs recycled aggregate, engineering dregs, sludge, alkalescence
Cementitious material, water and soil-solidified-agent (wherein, recycled aggregate, engineering dregs, sludge, alkaline cementitious material based on dry mass,
Water, soil-solidified-agent are in terms of solution quality).Wherein, moisture percentage in sewage sludge 60wt%, the leading sewage plant sludge of sludge, sludge
Middle content of beary metal is as shown in table 1；Engineering dregs moisture content is 15wt%；Soil-solidified-agent is native controlling nocturnal emission with astringent drugs Toogood, and concentration is
20wt%；Alkaline cementitious material is made of 32.5 Portland cements, II grade of flyash and II grade of quick lime, dry weight ratio
For 1：1：2.
Outline border slurry：Mass ratio 1：0.2：0.12：0.008 weighs spare recycled aggregate, cementitious material, water and naphthalene system diminishing
Agent, the mass concentration of water-reducing agent aqueous solution is 20wt%；Cementitious material used in outline border is by 32.5 Portland cements, II grade of powder
Coal ash and S95 grades of miberal powder compositions, dry weight ratio are 1：0.1：0.2.
Sludge is handled in the way of embodiment 1, and prepares bulk, difference lies in obtained by vibrating compression moulding
Core is cylindricality core, and compactness is 78% bulk, conserves to 28d and obtains the bulk that compression strength is 20Mpa.
Obtained bulk drying, which is shunk, is less than 0.050%, and mass loss rate is less than 1.5% after frost resistance reaches jelly, can
Applied in the building by laying bricks or stones of engineering sewer, pipe trench and enclosure wall.
Embodiment 3
Preparation compression strength is 40Mpa, and the size of length is respectively the bulk of 300mm, 150mm, 80mm, wherein,
Cylindricality core is a diameter of 100mm, is highly 50mm, the size of another core length be respectively 200mm, 30mm,
30mm；Core is two, should there is the clear distance of 5mm between core.
Sludge is handled in the way of embodiment 1, and prepares bulk, difference lies in, by vibrating compression moulding, simultaneously
To cylindrical core material and prismatic core, core compactness reaches 82%.
Obtained bulk intensity is more than 40MPa, and dry shrink is less than 0.045%, and frost resistance reaches mass loss after jelly
Rate is less than 1.5%.It can be applied to road surface and ground pavement.
Core matches：Mass ratio 1：0.6：0.4：0.8：0.3：0.008 weighs recycled aggregate, engineering dregs, sludge, alkalescence
Cementitious material, water and soil-solidified-agent (wherein, recycled aggregate, engineering dregs, sludge, alkaline cementitious material based on dry mass,
Water, soil-solidified-agent are in terms of solution quality).Wherein, moisture percentage in sewage sludge 60wt%, sludge be South Mountain sewage plant sludge, sludge
Middle content of beary metal is as shown in table 1；Engineering dregs moisture content is 15wt%；Soil-solidified-agent is native controlling nocturnal emission with astringent drugs Toogood, and concentration is
20wt%；Alkaline cementitious material is made of 42.5 Portland cements, II grade of flyash and II grade of quick lime, dry weight ratio
For 1：1：2.
Outline border slurry：Mass ratio 1：0.4：0.1.2：0.008, which weighs spare recycled aggregate, cementitious material, water and naphthalene system, subtracts
Aqua
Obtained bulk meets《Concrete road pavement brick》The indices requirement of Cc40 bulks, can apply in GB 28635
In road surface and ground pavement.
Embodiment 4
Bulk is prepared in the way of embodiment 1, difference lies in, in outline border slurry preparation process, the gelling material in raw material
Material only has cement, and spare recycled aggregate, cement and water are mixed.The intensity for the bulk being prepared reaches 20MPa, dry to shrink
Less than 0.055%, mass loss rate is less than 1.5% after frost resistance reaches jelly.
1 separate sources Heavy Metal Level In Sludge (mg/kg) of table
| Sludge source | Zn | Cu | Ni | As | Cd | Pb | Cr |
| Riverfront sewage plant | 1921 | 1725 | —— | —— | 2.26 | 207 | 197 |
| Imperial field sewage plant | 1372 | 98 | 16.8 | 1.49 | 0.17 | 0.82 | 1.24 |
| South Mountain sewage plant | 1090 | 120 | 34.2 | 1.49 | 3.42 | 76 | 54 |
The sludge fetched from three kinds of sludge factories, content of beary metal is as shown in table 1, respectively according to embodiment 1,2 and 3, by three
Kind sludge is made bulk by the present invention and heavy metal is cured, and heavy metal ion is carried out after made bulk maintenance 28d
Leaching concentration detects, and testing result shows that bulk reaches more than 99% to the solidification effect of heavy metal ion, almost heavy metal free
Ion leaches.It can be seen that the bulk of the present invention has the effect of good solidification sludge heavy metal.
Above example is understood, according to method for sludge treatment provided by the invention, can realize to Heavy Metals in Sludge from
The microorganism in sludge is effectively killed in the curing of son, without carrying out cumbersome processing to sludge, you can realize the secondary profit of discarded object
With.The present invention cures the bilayer of sludge by core and outline border, and the bulk for meeting varying strength requirement can be prepared.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of processing method of sludge, comprises the following steps：
(1) recycled aggregate of building waste is provided；Grain size≤16mm of the recycled aggregate, the moisture content of recycled aggregate for 1~
5wt%；The building waste includes the one or more in concrete, mortar, building stones and the material of brick；
(2) stood after the recycled aggregate that the step (1) obtains is mixed with sludge, carry out initial stage water suction, obtain the first mixing
Object；The time of the mixing is 30s~10min；The time of the standing is 10min~2h；
(3) the first mixture that the step (2) obtains with engineering dregs is mixed, obtains the second mixture；
(4) the second mixture that the step (3) obtains with alkaline cementitious material and water is mixed, obtains regeneration sludge slurry.
2. processing method according to claim 1, which is characterized in that the recycled aggregate, sludge, engineering dregs and alkalescence
For the dosage of cementitious material in terms of dry measure, the mass ratio of the recycled aggregate and sludge is 1：(0.1~1.2)；
The recycled aggregate and the mass ratio of engineering dregs are 1：(0.1~1.2)；
The recycled aggregate and the mass ratio of alkaline cementitious material are 1：(0.1~1.2)；
The mass ratio of the recycled aggregate and water is 1：(0.1~1).
3. processing method according to claim 1 or 2, which is characterized in that the preparation side of recycled aggregate in the step (1)
Method includes：The building waste is crushed, is sieved, cleaned and dried successively, obtains recycled aggregate.
4. processing method according to claim 1 or 2, which is characterized in that the alkalescence cementitious material includes cement, fine coal
Ash and lime；The mass ratio 1 of the cement, flyash and lime：(0.5~6)：(0.5~10).
5. processing method according to claim 1 or 2, which is characterized in that sludge includes river sludge in the step (2)
And/or waterworks sludge.
6. processing method according to claim 1, which is characterized in that the moisture content of the engineering dregs is 1~90wt%.
7. processing method according to claim 1, which is characterized in that further include soil in the mixed process of the step (4)
The addition of earth curing agent, the quality of the soil-solidified-agent for recycled aggregate quality (0,20%].
8. a kind of preparation method of bulk, comprises the following steps：
(I) according to any one of claim 1~7 processing method, regeneration sludge slurry is obtained；
The regeneration sludge slurry is subjected to forming processes, obtains core, the compactness of the core is more than 75%；
(II) recycled aggregate of building waste, cementitious material and water are mixed, obtains outline border slurry；The grain size of the recycled aggregate
≤ 16mm, moisture content≤10wt% of recycled aggregate；The building waste includes one in concrete, mortar, building stones and the material of brick
Kind is a variety of；
The mass ratio of the recycled aggregate, cementitious material and water is 1:(0.05~1.05):(0.3~1.4)；The cementitious material
Including cement；
(III) after the outline border slurry that the step (II) obtains being wrapped to the core that at least 1 piece of step (I) obtains, into
Row forming processes, obtain bulk；
The compactness of the bulk is more than 75%；The vertical range on core outer edge to each surface of bulk is not less than in the bulk
5mm；
The step (I) and step (II) do not have time order and function order.
9. preparation method according to claim 8, which is characterized in that cementitious material further includes fine coal in the step (II)
Ash and miberal powder, the mass ratio of the cement, flyash and miberal powder is [0.05,0.5]:(0,0.25]:(0,0.3].
10. preparation method according to claim 8 or claim 9, which is characterized in that the regeneration of building waste in the step (II)
In aggregate, cementitious material and water mixed process, the quality of the addition of additive, the recycled aggregate dry weight and additive is further included
Than for 1:(0,0.05].
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| CN109665774A (en) * | 2018-12-24 | 2019-04-23 | 四川正升环保科技有限公司 | Sludge curing stabilizes composite material and preparation method, sludge curing stabilization treatment method and solidification sludge |
| WO2022143706A1 (en) * | 2020-12-31 | 2022-07-07 | 湖北聚海环境科技有限公司 | Method for preparing building materials from sludge containing excessive heavy metals by using triple solidification technique |
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