CN116143485A - Multi-source excitation solid waste-based sludge curing agent and preparation method thereof - Google Patents
Multi-source excitation solid waste-based sludge curing agent and preparation method thereof Download PDFInfo
- Publication number
- CN116143485A CN116143485A CN202310074217.6A CN202310074217A CN116143485A CN 116143485 A CN116143485 A CN 116143485A CN 202310074217 A CN202310074217 A CN 202310074217A CN 116143485 A CN116143485 A CN 116143485A
- Authority
- CN
- China
- Prior art keywords
- micro powder
- parts
- curing agent
- slag micro
- solid waste
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000010802 sludge Substances 0.000 title claims abstract description 56
- 239000002910 solid waste Substances 0.000 title claims abstract description 51
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 50
- 230000005284 excitation Effects 0.000 title claims abstract description 49
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 239000002893 slag Substances 0.000 claims abstract description 118
- 239000000843 powder Substances 0.000 claims abstract description 64
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 57
- 239000010959 steel Substances 0.000 claims abstract description 57
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 40
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 28
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 27
- 239000000017 hydrogel Substances 0.000 claims abstract description 20
- 239000000292 calcium oxide Substances 0.000 claims abstract description 15
- 239000002562 thickening agent Substances 0.000 claims abstract description 14
- 235000012255 calcium oxide Nutrition 0.000 claims abstract description 13
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 11
- 239000010440 gypsum Substances 0.000 claims abstract description 11
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims abstract description 10
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims abstract description 9
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000005871 repellent Substances 0.000 claims abstract description 8
- 230000002940 repellent Effects 0.000 claims abstract description 8
- 229920002818 (Hydroxyethyl)methacrylate Polymers 0.000 claims abstract description 6
- WOBHKFSMXKNTIM-UHFFFAOYSA-N Hydroxyethyl methacrylate Chemical compound CC(=C)C(=O)OCCO WOBHKFSMXKNTIM-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000000440 bentonite Substances 0.000 claims abstract description 6
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 6
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000003999 initiator Substances 0.000 claims abstract description 6
- ZIUHHBKFKCYYJD-UHFFFAOYSA-N n,n'-methylenebisacrylamide Chemical compound C=CC(=O)NCNC(=O)C=C ZIUHHBKFKCYYJD-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000003756 stirring Methods 0.000 claims description 37
- 239000000243 solution Substances 0.000 claims description 19
- 239000003245 coal Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 14
- 230000004048 modification Effects 0.000 claims description 14
- 238000012986 modification Methods 0.000 claims description 14
- 238000001035 drying Methods 0.000 claims description 8
- 239000012670 alkaline solution Substances 0.000 claims description 6
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 5
- 238000000498 ball milling Methods 0.000 claims description 5
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 5
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 5
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 5
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 claims description 5
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims description 5
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims description 5
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims description 5
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 claims description 5
- 229910001341 Crude steel Inorganic materials 0.000 claims description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 4
- 238000002791 soaking Methods 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 3
- 238000007873 sieving Methods 0.000 claims description 3
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 2
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 2
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- 239000010881 fly ash Substances 0.000 claims description 2
- -1 polyoxyethylene Polymers 0.000 claims description 2
- 150000003839 salts Chemical class 0.000 claims description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 2
- 235000017550 sodium carbonate Nutrition 0.000 claims description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims 2
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims 1
- 235000017557 sodium bicarbonate Nutrition 0.000 claims 1
- 239000007789 gas Substances 0.000 description 30
- 239000002689 soil Substances 0.000 description 22
- 230000000694 effects Effects 0.000 description 16
- 239000002245 particle Substances 0.000 description 14
- 238000006243 chemical reaction Methods 0.000 description 13
- 238000012360 testing method Methods 0.000 description 10
- 238000006703 hydration reaction Methods 0.000 description 9
- 230000018044 dehydration Effects 0.000 description 8
- 238000006297 dehydration reaction Methods 0.000 description 8
- 239000002918 waste heat Substances 0.000 description 8
- 239000002699 waste material Substances 0.000 description 8
- 239000011575 calcium Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 239000000126 substance Substances 0.000 description 7
- 239000002956 ash Substances 0.000 description 6
- 238000011065 in-situ storage Methods 0.000 description 6
- 230000009257 reactivity Effects 0.000 description 6
- 239000004568 cement Substances 0.000 description 5
- 238000003912 environmental pollution Methods 0.000 description 5
- 239000000499 gel Substances 0.000 description 5
- 230000036571 hydration Effects 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 238000001879 gelation Methods 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000004064 recycling Methods 0.000 description 4
- 239000003513 alkali Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000004567 concrete Substances 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000008239 natural water Substances 0.000 description 3
- 238000006386 neutralization reaction Methods 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 2
- 229910002800 Si–O–Al Inorganic materials 0.000 description 2
- 229910002808 Si–O–Si Inorganic materials 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000003837 high-temperature calcination Methods 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000002715 modification method Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910004283 SiO 4 Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 239000003637 basic solution Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000010883 coal ash Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910001653 ettringite Inorganic materials 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229910001414 potassium ion Inorganic materials 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Images
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
- C04B28/14—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 calcium sulfate cements
- C04B28/142—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements
- C04B28/144—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being a flue gas desulfurization product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
- B01F27/70—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms
- B01F27/701—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms comprising two or more shafts, e.g. in consecutive mixing chambers
- B01F27/706—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms comprising two or more shafts, e.g. in consecutive mixing chambers with all the shafts in the same receptacle
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/008—Sludge treatment by fixation or solidification
-
- 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
- C04B7/00—Hydraulic cements
- C04B7/14—Cements containing slag
- C04B7/147—Metallurgical slag
- C04B7/153—Mixtures thereof with other inorganic cementitious materials or other activators
- C04B7/21—Mixtures thereof with other inorganic cementitious materials or other activators with calcium sulfate containing activators
-
- 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
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
-
- 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
-
- 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
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Treatment Of Sludge (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a multi-source excitation solid waste-based sludge curing agent and a preparation method thereof, wherein the curing agent comprises 30-40 parts of modified steel slag micro powder, 10-20 parts of modified slag micro powder, 10-15 parts of desulfurized ash, 5-10 parts of desulfurized gypsum, 10-20 parts of quicklime, 5-10 parts of hydrogel, 0-5 parts of anhydrous calcium chloride, 0-3 parts of thickener and 0-3 parts of water repellent; in the hydrogel, the mass ratio of an acrylic acid solution, superfine bentonite, a sodium hydroxide solution, an initiator, N-methylene bisacrylamide and hydroxyethyl methacrylate is 100:20-25:0.02-0.08:0.2-0.4:0.2-0.4:5-10; the modified steel slag micro powder and the modified slag micro powder are subjected to thermal excitation and carbonation treatment.
Description
Technical Field
The invention belongs to the field of civil engineering materials, and particularly relates to a multi-source excitation solid waste-based sludge curing agent and a preparation method thereof.
Background
The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.
In large-scale infrastructure construction in our country, the water body bottom usually has a deep silt layer deposited under the double-layer action of slow water flow and microorganisms in water-rich areas such as rivers, ponds, marshes and the like. The silt is soft soil with natural water content larger than the fluidity limit, has low mechanical strength and high compressibility, is difficult to be directly used as natural foundation soil, and is required to be subjected to artificial solidification treatment. At present, the solidified sludge mainly uses cement, lime, fly ash and the like as main materials, the solidifying effect of the solidifying agent depends on soil granularity and water content, the dewatering effect is poor, the solidifying cost is high, the solidified sludge mostly has the defects of low strength, poor permeability and the like after solidification, the engineering application effect is not ideal, and the resource waste and the environmental pollution are caused.
Billions of tons of industrial solid wastes (steel slag, slag and the like) are generated in industrial production in China each year, the utilization rate of the waste residues is low, the stacking occupied space is large, and the landfill treatment causes environmental pollution. At the present stage, coal is still one of the main energy sources in China, and a large amount of coal is required to be combusted in cement, lime and thermal power generation. The tail gas discharged by coal combustion carries a large amount of coal ash, carbon dioxide and other acid gases, and the direct discharge without treatment can seriously pollute the atmosphere. Meanwhile, a large amount of waste heat is contained in the tail gas, and huge resource waste can be caused by improper utilization.
In summary, the traditional sludge curing agent has poor curing effect, and is difficult to meet the requirement of in-situ curing; the industrial solid waste has low recycling degree due to poor gelatinization activity, so that a large amount of solid waste is accumulated, and land resource waste and environmental pollution are caused; the tail gas discharged by coal combustion is easy to cause atmospheric pollution, and the utilization rate of waste heat contained in the tail gas is low.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide a multi-source excitation solid waste-based sludge curing agent and a preparation method thereof.
In order to achieve the above object, the present invention is realized by the following technical scheme:
in a first aspect, the invention provides a multi-source excitation solid waste-based sludge curing agent, which comprises 30-40 parts of modified steel slag micropowder, 10-20 parts of modified slag micropowder, 10-15 parts of desulfurized ash, 5-10 parts of desulfurized gypsum, 10-20 parts of quicklime, 5-10 parts of hydrogel, 0-5 parts of anhydrous calcium chloride, 0-3 parts of thickener and 0-3 parts of water repellent;
in the hydrogel, the mass ratio of an acrylic acid solution, superfine bentonite, a sodium hydroxide solution, an initiator, N-methylene bisacrylamide and hydroxyethyl methacrylate is 100:20-25:0.02-0.08:0.2-0.4:0.2-0.4:5-10;
the modified steel slag micro powder and the modified slag micro powder are subjected to thermal excitation and carbonation treatment.
The steel slag and the slag are industrial byproducts produced in the steel smelting process, and CaO-Al is adopted as chemical composition through a high-temperature calcination process 2 O 3 -SiO 2 System ofMainly, has extremely high vitreous phase content and volcanic ash reactivity. However, the two cannot be directly used as a sludge curing agent, because ions in water cannot destroy single bond energy of Si-O-Si, al-O-Al and Si-O-Al structures on the surfaces of particles, hydration reaction is very slow or difficult to react, and therefore, a certain method is required to excite the reactivity.
Research shows that the activity of the solid waste can be stimulated by means of physical excitation (mechanical grinding), chemical excitation (alkali excitation) and thermal excitation (high-temperature calcination), so that the mechanical property of the solid waste-based cementing material is improved. Wherein, physical excitation can be realized by mechanical grinding of a ball mill, the fineness of particles is reduced to increase the specific surface area and improve the reactivity; chemical excitation can be realized by adding alkaline substances into the curing agent, so that Si-O-Si bonds, al-O-Al bonds and Si-O-Al bonds are promoted to break, and the reactivity is improved.
On the other hand, the acid gases such as carbon dioxide and the waste heat existing in the coal-fired tail gas can also be used for preparing modified steel slag and modified slag. The acid gas can destroy the surface structure of the particles, further increase the specific surface area, and simultaneously, the carbonate solid adsorbed on the surfaces of the particles can also be used for the subsequent hardening reaction, so that the reaction activity is improved and the strength of the solidified soil is increased; waste heat can be used for thermal excitation of solid waste, increasing the proportion of active ingredient. Therefore, the invention improves the gelation activity of the solid waste to the maximum extent by means of multi-source excitation means such as physics, chemistry, heat and the like, and obtains the modified steel slag and slag for preparing the solid waste-based sludge curing agent.
The sludge curing agent disclosed by the invention can be directly applied to in-situ curing of sludge, is excellent in engineering application effect, and good in mechanical property of the cured sludge, does not cause secondary mud formation, has no secondary pollution, achieves the purposes of treating waste with waste and protecting environment, and accords with the principle of green environmental protection.
Quicklime and desulfurized gypsum can be used as both activators and gelling materials.
The strong alkaline environment generated by the quicklime and the desulfurized gypsum is beneficial to the hydrolysis of the steel slag and slag glass bulk phase structure, promotes the continuous progress of hydration reaction and pozzolan reaction, and generates more gelled products. The early reaction of slag is rapid, and the later reaction of slag is continuous.
In some embodiments, the thickener is selected from three of carboxymethyl cellulose, sodium polyacrylate, polyoxyethylene, polyvinylpyrrolidone.
In a second aspect, the invention provides a method for preparing a multi-source excitation solid waste-based sludge curing agent, comprising the following steps:
cleaning the crude steel slag and the crude slag, and drying;
ball milling the coarse steel slag and the coarse ore slag, and sieving to obtain steel slag micro powder and slag micro powder;
soaking the steel slag micro powder and the slag micro powder in a weak alkaline solution for a set time, and drying for later use;
respectively placing the steel slag micro powder and the slag micro powder which are soaked in the weak base solution into a modification device, introducing high-temperature high-pressure coal tail gas, stirring the steel slag micro powder and the slag micro powder, performing thermal excitation and carbonating treatment on the steel slag micro powder and the slag micro powder, then placing the treated micro powder into cold water for rapid cooling, and drying to obtain modified steel slag micro powder and modified slag micro powder;
the gel component, the dehydration component and the additive of the multi-source excited solid waste-based sludge curing agent are respectively mixed to prepare; obtaining the product.
In order to ensure the maximum activity of the steel slag and the slag, the micro powder after thermal excitation and carbonation treatment is put into cold water to be rapidly cooled and then dried, so as to obtain modified steel slag micro powder and slag micro powder.
In some embodiments, the coarse steel slag and the coarse ore slag are ball milled and then pass through a 200 mesh sieve to obtain steel slag micro powder and slag micro powder.
In some embodiments, the weakly basic solution is sodium carbonate, sodium bicarbonate, and aqueous ammonia solution, having a pH of 8 to 11.
In some embodiments, the high temperature high pressure coal tail gas has a temperature of 600-800 ℃ and a pressure of 1.5-2.0MPa.
In some embodiments, the modifying device comprises a tank, a first stirrer, and a second stirrer;
the first stirrer and the second stirrer have the same structure and comprise a plurality of stirring blades axially arranged on a stirring shaft and a salt stirring shaft, and the first stirrer and the second stirrer are arranged in the tank body in parallel, so that the stirring blades of the two stirrers are alternately arranged;
the stirring shaft is of a hollow structure, nozzles are uniformly distributed on the side wall of the stirring shaft, and the stirring shaft is used for being connected with a high-temperature high-pressure coal tail gas source.
Nozzles are uniformly distributed on the stirring shaft, so that the high-temperature high-pressure coal tail gas, the steel slag micro powder and the slag micro powder are uniformly mixed in the stirring process, and the uniformity of modification is improved.
The stirring blades of the two stirrers are alternately arranged, so that the mixing dead angle of the steel slag micro powder and the slag micro powder in the tank body can be eliminated, and the uniformity of modification can be further improved.
Accurately weighing all components of the curing agent according to a certain mass ratio, placing the curing agent into a concrete mixer, stirring for 30 minutes at 100-150 rpm to obtain the solid waste-based sludge curing agent, and uniformly stirring the curing agent with sludge in situ by using an in-situ stirring machine to form a foundation with high bearing capacity.
The water content of the in-situ solidified sludge is 50-80%, and when the water content is too high, preliminary dehydration modes such as filter press dehydration, geotechnical tube bag dehydration, natural air drying and the like can be adopted.
The curing mechanism of the multi-source excitation solid waste-based sludge curing agent is as follows:
firstly, adding a prepared sludge curing agent into high-water-content sludge, and rapidly absorbing most of free water in the sludge by a dehydration component in the curing agent, wherein hydrogel has extremely strong water absorption and water retention, the free water in the sludge is converted into hydration water and adsorbed water, the hydrogel absorbs water to expand and fill in pores of a soil body, the compactness of the soil body is primarily improved, and the water absorbed in the early stage can be supplied for later hydration reaction of the curing agent to promote the continuous progress of gelation reaction;
the quicklime undergoes severe hydration reaction to consume a large amount of water to generate Ca (OH) 2 Ionized OH of - Ions will raise the interior of the siltProvides an alkaline environment for the chemical excitation of solid wastes, and accelerates the gelation reaction;
anhydrous calcium chloride absorbs significant amounts of moisture and provides significant amounts of Ca for the pozzolan reaction 2+ The early strength of the solidified sludge is improved.
Then, the solid waste material excited by multiple sources is subjected to a large amount of OH - Depolymerizing the glass phase structure to form reactive SiO 4 ] 4- And [ AlO ] 4 ] 5- A tetrahedral structure, wherein physical excitation of ball milling of the ball mill increases the reaction rate by increasing the specific surface area of the particles; the thermal excitation and carbonation reaction of the modification of the tail gas of the fire coal can improve the reactivity of the solid waste, eliminate f-CaO and f-MgO in the steel slag and increase the stability.
The carbonate crystals adsorbed on the steel slag and the surface of the slag can be dissolved in alkaline environment, and calcium carbonate precipitates are regenerated to fill the pores of the particles.
Finally, depolymerizing the [ SiO ] formed 4 ] 4- And [ AlO ] 4 ] 5- Tetrahedral structure and Ca 2+ The reaction produced C-S-H, C-A-H gel. Gypsum hydration provides substantial amounts of SO 4 2- The needle-shaped and short rod-shaped AFt is generated by continuously reacting with the generated C-S-H, is an expansive hydrate, can fill gaps in soil, enables the soil structure to be more compact, and meanwhile, the needle-shaped ettringite can form a grid structure, so that the soil strength is greatly improved.
Second, a large amount of Ca 2+ And supersaturation crystallization is also caused, and the electric double layers on the surfaces of minerals in the steel slag and the slag are destroyed, so that the hydration activity of the steel slag and the slag is stimulated.
In addition, a large amount of Ca 2+ Easy to diffuse with Na in the clay particle diffusion layer in the mucky soil + 、K + Ion exchange and aggregation occurs due to Ca 2+ The radius is smaller, the thickness of the diffusion layer in the double electric layer is smaller, the bound water is less, the cohesive force among soil particles is increased, larger particle clusters are easily formed by bonding, and the strength of the solidified mucky soil is also improved.
The beneficial effects achieved by one or more embodiments of the present invention described above are as follows:
(1) Compared with cement, the invention reduces natural resource consumption and environmental pollution, realizes the resource efficient cooperative utilization of the solid waste, has low cost, no environmental pollution and good curing effect, and accords with the green environmental protection principle.
(2) Aiming at the defect of poor cementing activity of steel slag and slag, a modification thought of multi-source excitation of solid wastes is provided. Comprising the following steps: ball milling is carried out by using a ball mill to reduce the particle size of particles and increase the physical excitation of the specific surface area of the particles; comprehensive utilization of CO in coal-fired tail gas 2 And the thermal excitation and carbonation treatment of the waste heat reduce carbon emission and the recycling of the waste heat, and researches show that the carbonation treatment can eliminate f-CaO and f-MgO in the steel slag and increase the stability; and adding a composite alkali excitation mode of quicklime and desulfurized gypsum into the curing agent.
(3) Aiming at the characteristic of high natural water content of the sludge, a dehydration component is added into the curing agent to quickly reduce the water content and realize the purpose of in-situ curing. Wherein, the quicklime hydration consumes moisture and generates alkaline environment at the same time, which excites the reactivity of the solid waste base cementing material. The anhydrous calcium chloride can absorb a large amount of free water and can provide a large amount of Ca for the gelation reaction 2 + Promote the generation of C-S-H, C-A-H gel and AFt and improve the early strength of the curing agent.
The hydrogel has extremely strong water absorption and water retention, can convert a large amount of free water in the sludge into hydration water and adsorption water, and stably exists in the hydrogel, so that the connection among soil particles is increased, and the strength of the sludge is improved; in addition, the water adsorbed in the hydrogel can be used for continuously carrying out the later hydrolysis reaction of the cementing material, so that the later strength of the silt solidified soil is improved.
(4) The invention develops a solid waste modification device based on a solid waste multi-source excitation thought. The coal-fired tail gas is introduced into a stirring tank which is respectively filled with slag and steel slag, and under the drive of a stirring blade, the solid waste is fully contacted with the tail gas, so that the reaction activity is stimulated, the stability is improved, the recycling utilization of waste gas and waste heat is realized, and the purpose of treating waste with waste is achieved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
FIG. 1 is a schematic diagram of a solid waste modification device according to an embodiment of the present invention;
FIG. 2 is a flow chart of a solid waste modification process according to an embodiment of the present invention;
FIG. 3 is a flow chart of the preparation and application of the solid waste-based sludge curing agent according to an embodiment of the present invention;
FIG. 4 is a photograph (2 μm) of a 28d age electron microscope scan of the sludge of example 1 of the present invention after curing.
In the figure: the mutual spacing or dimensions are exaggerated for the purpose of showing the positions of the various parts, and the schematic illustrations are used for illustration only.
1-a stirring tank; 2-stirring blades; 3-a stirring shaft; 4-nozzles; 5-feeding hopper; 6-a gas pressurizing pump; 7-a gas storage tank; 8-a gas pipe; 9-an air outlet; 10-a discharge hole.
Detailed Description
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
As described by the background, in order to solve the defects of the existing sludge curing technology, the invention provides the multi-source excitation solid waste-based sludge curing agent and the modification device thereof, and solves the technical problems that the natural water content of the sludge is high, the curing effect of the traditional curing agent such as cement is not ideal, industrial solid waste is accumulated in a large amount because of incapability of recycling, the direct discharge of industrial waste gas is easy to cause atmospheric pollution, the waste heat is not effectively utilized, and the like.
The invention is further illustrated below with reference to examples.
Example 1
The preparation method of the multisource excitation modified steel slag and slag comprises the following specific steps:
(1) Pretreatment: placing the crude steel slag and the crude ore slag of the steel plant in clean water to wash out impurities, and drying the crude steel slag and the crude ore slag in an oven at 90-110 ℃ to constant weight.
(2) Physical excitation: the coarse steel slag and the coarse ore slag are respectively put into a ball mill, ball-milled for 60 minutes at 200-350 revolutions per minute, and then sieved by a 200-mesh sieve to obtain steel slag micro powder and slag micro powder.
(3) And respectively soaking the obtained steel slag micro powder and the obtained slag micro powder in a weak alkaline solution for 24 hours, and then drying the steel slag micro powder and the slag micro powder in a baking oven at 60 ℃ for 24 hours for standby.
(4) Thermodynamic excitation and carbonation: respectively placing the steel slag micropowder and the slag micropowder into a modification device, introducing high-temperature high-pressure coal tail gas, starting a stirring blade to stir for 2-3 hours at the speed of 100-150 rpm, and ensuring CO in the tail gas 2 The acid gases are fully absorbed, and the steel slag micro powder and the slag micro powder are fully thermally excited.
The modifying device is shown in fig. 1: comprises a stirring tank 1, stirring blades 2, a stirring shaft 3, a nozzle 4, a feeding hopper 5, a gas pressurizing pump 6, a gas storage tank 7, a gas pipe 8, a gas outlet 9 and a discharge port 10. The agitator tank 1 is placed on the ground horizontally, a plurality of stirring shafts 3 are arranged in the agitator tank, the stirring shafts 3 are axially hollow and provided with gas transmission pipes, and the stirring shafts 3 are equidistantly and alternately provided with a plurality of nozzles 4 and stirring blades 2. The air outlet 9 can be externally connected with other devices to further treat the tail gas and discharge the tail gas to the atmosphere, and the discharge port 10 is used for timely taking out the modified solid waste.
The multi-source excitation solid waste-based sludge curing agent consists of the following components: 30 parts of modified steel slag micro powder, 15 parts of modified slag micro powder, 15 parts of desulfurized ash, 5 parts of desulfurized gypsum, 15 parts of quicklime powder, 10 parts of hydrogel, 5 parts of anhydrous calcium chloride, 3 parts of thickener and 2 parts of water repellent;
in the thickener, the mass ratio of the carboxymethyl cellulose to the sodium polyacrylate to the polyvinylpyrrolidone is 1:1:1; .
In the hydrogel, the mass ratio of an acrylic acid solution, superfine bentonite, a sodium hydroxide solution, an initiator, N-methylene bisacrylamide and hydroxyethyl methacrylate is 100:20-25:0.02-0.08:0.2-0.4:0.2-0.4:5-10; wherein the neutralization degree of the acrylic acid solution and the sodium hydroxide solution is 70 percent.
The chemical composition ratios of the components in the gel component are shown in table 1 below.
TABLE 1 chemical compositions of the components
Example 2
The multi-source excitation solid waste-based sludge curing agent consists of the following components:
35 parts of modified steel slag micropowder, 15 parts of modified slag micropowder, 10 parts of desulfurized ash, 5 parts of desulfurized gypsum, 15 parts of quicklime powder, 10 parts of hydrogel, 5 parts of anhydrous calcium chloride, 3 parts of thickener and 2 parts of water repellent;
the modified steel slag micropowder and the modification method of the modified slag micropowder were the same as in example 1.
In the hydrogel, the mass ratio of an acrylic acid solution, superfine bentonite, a sodium hydroxide solution, an initiator, N-methylene bisacrylamide and hydroxyethyl methacrylate is 100:25:0.05:0.3:0.2:5, wherein the neutralization degree of the acrylic acid solution and the sodium hydroxide solution is 70%.
In the thickener, the mass ratio of the carboxymethyl cellulose to the sodium polyacrylate to the polyvinylpyrrolidone is 1:2:3.
Example 3
The multi-source excitation solid waste-based sludge curing agent consists of the following components: 40 parts of modified steel slag micropowder, 15 parts of modified slag micropowder, 10 parts of desulfurized ash, 5 parts of desulfurized gypsum, 10 parts of quicklime powder, 10 parts of hydrogel, 5 parts of anhydrous calcium chloride, 3 parts of thickener and 2 parts of water repellent. The modified steel slag micropowder and the modification method of the modified slag micropowder were the same as in example 1.
In the hydrogel, the mass ratio of an acrylic acid solution, superfine bentonite, a sodium hydroxide solution, an initiator, N-methylene bisacrylamide and hydroxyethyl methacrylate is 100:25:0.08:0.2:0.4:10; wherein the neutralization degree of the acrylic acid solution and the sodium hydroxide solution is 70 percent.
In the thickener, the mass ratio of the carboxymethyl cellulose to the sodium polyacrylate to the polyvinylpyrrolidone is 2:1:1.
Comparative example 1
100 parts of P.O42.5 ordinary Portland cement.
Comparative example 2
The silt curing agent consists of the following components:
70 parts of a gelling component comprising 70 parts of P.O42.5 ordinary Portland cement.
25 parts of dehydration component comprising 10 parts of quicklime powder, 10 parts of hydrogel and 5 parts of anhydrous calcium chloride;
5 parts of additive component comprising 3 parts of thickener and 2 parts of water repellent.
Comparative example 3
The silt curing agent consists of the following components: 30 parts of common steel slag micropowder, 15 parts of common slag micropowder, 15 parts of desulfurized ash, 5 parts of desulfurized gypsum, 15 parts of quicklime powder, 10 parts of hydrogel (same as in example 1), 5 parts of anhydrous calcium chloride, 3 parts of thickener, 2 parts of water repellent and the thickener are composed in the same manner as in example 1.
Test example 1
The components are placed into a concrete mixer and stirred for 30 minutes at 100-150 rpm to obtain the multi-source excitation solid waste-based sludge curing agent, and then the multi-source excitation solid waste-based sludge curing agent is mixed into silt with the water content of 60% according to the mixing amount of 15%, and the silt is placed into the concrete mixer and stirred uniformly to obtain a stirred soil sample. And (3) pouring the stirring soil sample into a standard triple mold with the thickness of 7.07cm and 7.07cm for molding, naturally settling, then moving to a vibrating table for two-layer compaction molding, and scraping the upper surface of the test piece by a ruler. And (3) placing the test block and the die into a standard constant temperature and humidity curing box for curing, wherein the curing conditions simulate the field environment, the curing temperature is 20+/-1 ℃, and the curing humidity is more than or equal to 95%. And (3) after 24 hours, the test block is self-supporting for demolding, the demolded test block is marked, and the test block is continuously put into a curing box for curing to a specified age for an unconfined compressive strength test, and the unconfined compressive strength of the sample is obtained after loading by using a universal testing machine, and is shown in Table 2.
Table 2 cured sludge unconfined compressive strength table
Test example 2
To further observe the void changes, cement generation and microstructure changes before and after curing of the sludge, the curing mechanism of the sludge curing agent was analyzed, scanning Electron Microscope (SEM) tests were performed on the cured soil of each example at the 28d age, and fig. 4 is a scanning electron microscope (2 μm) picture of the 28d age after curing of the sludge of example 1.
As can be seen from FIG. 4, a large amount of flocculent C-S-H, C-A-H and other alkali-activated products are generated in the solidified soil of the multi-source activated solid waste-based sludge solidifying agent, and the gel products are covered on the surfaces of the sludge particles to perform cementing effect. In addition, the calcium aluminate hydrate product can generate AFt crystals with micro-expansion characteristic under the existence of sulfate, and the AFt crystals are in needle shape and short rod shape, can serve as a soil body skeleton and fill pores, and are beneficial to improving the compactness and mechanical property of the silt. The hydrogel in the dehydration component can absorb water and expand to fill the pores of the soil body on one hand, and can intelligently regulate and control the water content of the soil body on the other hand, absorb water when wet and release water when dry, so that the performance of solidifying the silt soil is ensured to the greatest extent.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A multi-source excitation solid waste-based sludge curing agent is characterized in that: comprises 30-40 parts of modified steel slag micropowder, 10-20 parts of modified slag micropowder, 10-15 parts of desulfurized fly ash, 5-10 parts of desulfurized gypsum, 10-20 parts of quicklime, 5-10 parts of hydrogel, 0-5 parts of anhydrous calcium chloride, 0-3 parts of thickener and 0-3 parts of water repellent;
in the hydrogel, the mass ratio of an acrylic acid solution, superfine bentonite, a sodium hydroxide solution, an initiator, N-methylene bisacrylamide and hydroxyethyl methacrylate is 100:20-25:0.02-0.08:0.2-0.4:0.2-0.4:5-10;
the modified steel slag micro powder and the modified slag micro powder are subjected to thermal excitation and carbonation treatment.
2. The multi-source excited solid waste-based sludge curing agent as claimed in claim 1, wherein: the thickener is selected from three of carboxymethyl cellulose, sodium polyacrylate, polyoxyethylene and polyvinylpyrrolidone.
3. A preparation method of a multi-source excitation solid waste-based sludge curing agent is characterized by comprising the following steps: the method comprises the following steps:
cleaning the crude steel slag and the crude slag, and drying;
ball milling the coarse steel slag and the coarse ore slag, and sieving to obtain steel slag micro powder and slag micro powder;
soaking the steel slag micro powder and the slag micro powder in a weak alkaline solution for a set time, and drying for later use;
respectively placing the steel slag micro powder and the slag micro powder which are soaked in the weak base solution into a modification device, introducing high-temperature high-pressure coal tail gas, stirring the steel slag micro powder and the slag micro powder, performing thermal excitation and carbonating treatment on the steel slag micro powder and the slag micro powder, then placing the treated micro powder into cold water for rapid cooling, and drying to obtain modified steel slag micro powder and modified slag micro powder;
and uniformly mixing the components of the multi-source excited solid waste-based sludge curing agent to obtain the multi-source excited solid waste-based sludge curing agent.
4. The method for preparing the multi-source excitation solid waste-based sludge curing agent according to claim 3, which is characterized in that: ball milling the coarse steel slag and the coarse ore slag, and sieving with a 200-mesh sieve to obtain steel slag micro powder and slag micro powder.
5. The method for preparing the multi-source excitation solid waste-based sludge curing agent according to claim 3, which is characterized in that: the weak alkaline solution is sodium carbonate, sodium bicarbonate and ammonia water solution, and the pH value of the weak alkaline solution is 8-11.
6. The method for preparing the multi-source excitation solid waste-based sludge curing agent according to claim 3, which is characterized in that: the time for soaking the steel slag micro powder and the slag micro powder in the weak alkaline solution is 20-30h.
7. The method for preparing the multi-source excitation solid waste-based sludge curing agent according to claim 3, which is characterized in that: the temperature of the high-temperature high-pressure coal tail gas is 600-800 ℃ and the pressure is 1.5-2.0MPa.
8. The method for preparing the multi-source excitation solid waste-based sludge curing agent according to claim 7, which is characterized in that: the pressure of the high-temperature high-pressure coal tail gas is 1.5-2.0MPa.
9. The method for preparing the multi-source excitation solid waste-based sludge curing agent according to claim 3, which is characterized in that: the time for carrying out thermal excitation and carbonating treatment on the steel slag micro powder and the slag micro powder is 2-3h.
10. The method for preparing the multi-source excitation solid waste-based sludge curing agent according to claim 3, which is characterized in that: the modification device comprises a tank body, a first stirrer and a second stirrer;
the first stirrer and the second stirrer have the same structure and comprise a plurality of stirring blades axially arranged on a stirring shaft and a salt stirring shaft, and the first stirrer and the second stirrer are arranged in the tank body in parallel, so that the stirring blades of the two stirrers are alternately arranged;
the stirring shaft is of a hollow structure, nozzles are uniformly distributed on the side wall of the stirring shaft, and the stirring shaft is used for being connected with a high-temperature high-pressure coal tail gas source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310074217.6A CN116143485A (en) | 2023-02-07 | 2023-02-07 | Multi-source excitation solid waste-based sludge curing agent and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310074217.6A CN116143485A (en) | 2023-02-07 | 2023-02-07 | Multi-source excitation solid waste-based sludge curing agent and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116143485A true CN116143485A (en) | 2023-05-23 |
Family
ID=86373055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310074217.6A Pending CN116143485A (en) | 2023-02-07 | 2023-02-07 | Multi-source excitation solid waste-based sludge curing agent and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116143485A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117209121A (en) * | 2023-11-07 | 2023-12-12 | 长大市政工程(广东)有限公司 | Sludge drying agent and method for improving sludge drying speed |
| CN117602917A (en) * | 2024-01-22 | 2024-02-27 | 中建八局西南建设工程有限公司 | Solid waste base composite curing agent and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106431158A (en) * | 2016-10-12 | 2017-02-22 | 武汉大学 | Method for preparing building material product by clinker-free steel slag gel material and multiple CO2 absorbing techniques |
| CN209721623U (en) * | 2019-02-21 | 2019-12-03 | 佛山市极速环保科技有限公司 | A kind of sewage treatment chemicals dosing plant |
| CN114032723A (en) * | 2021-11-26 | 2022-02-11 | 山东大学 | Method for regulating and controlling water content and compact state of roadbed based on weather-resistant hydrogel in operation period |
| CN115594426A (en) * | 2022-10-28 | 2023-01-13 | 山东高速工程建设集团有限公司（Cn） | Multi-source solid waste synergistic functional cementing material and preparation method thereof |
-
2023
- 2023-02-07 CN CN202310074217.6A patent/CN116143485A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106431158A (en) * | 2016-10-12 | 2017-02-22 | 武汉大学 | Method for preparing building material product by clinker-free steel slag gel material and multiple CO2 absorbing techniques |
| CN209721623U (en) * | 2019-02-21 | 2019-12-03 | 佛山市极速环保科技有限公司 | A kind of sewage treatment chemicals dosing plant |
| CN114032723A (en) * | 2021-11-26 | 2022-02-11 | 山东大学 | Method for regulating and controlling water content and compact state of roadbed based on weather-resistant hydrogel in operation period |
| CN115594426A (en) * | 2022-10-28 | 2023-01-13 | 山东高速工程建设集团有限公司（Cn） | Multi-source solid waste synergistic functional cementing material and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 张伟，中国建材工业出版社: "《高性能水泥基材料应用技术》", vol. 1, 31 August 2017, pages: 52 - 57 * |
| 魏瑞丽等: "钢渣活性激发的机理及研究进展", 《材料导报》, vol. 28, no. 11, 10 November 2014 (2014-11-10), pages 105 - 108 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117209121A (en) * | 2023-11-07 | 2023-12-12 | 长大市政工程(广东)有限公司 | Sludge drying agent and method for improving sludge drying speed |
| CN117602917A (en) * | 2024-01-22 | 2024-02-27 | 中建八局西南建设工程有限公司 | Solid waste base composite curing agent and preparation method thereof |
| CN117602917B (en) * | 2024-01-22 | 2024-03-22 | 中建八局西南建设工程有限公司 | Solid waste base composite curing agent and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Yang et al. | Sustainable clinker-free solid waste binder produced from wet-ground granulated blast-furnace slag, phosphogypsum and carbide slag | |
| Wang et al. | CO2 carbonation-induced improvement in strength and microstructure of reactive MgO-CaO-fly ash-solidified soils | |
| CN112125541B (en) | Method for activating waste concrete regenerated micro powder through wet carbonization and application of regenerated micro powder | |
| CN107337414B (en) | Carbonized baking-free brick prepared from marine waste sludge and preparation method thereof | |
| CN116143485A (en) | Multi-source excitation solid waste-based sludge curing agent and preparation method thereof | |
| CN109485368B (en) | Soft soil curing agent with high water content and application thereof | |
| CN112266193A (en) | Artificial steel slag aggregate and preparation method and application thereof | |
| CN112358249A (en) | River silt base engineering soil and preparation method thereof | |
| CN105218057A (en) | A kind of green lightweight aggregate concrete and preparation technology thereof | |
| CN115321890A (en) | Solid waste base binder for carbon dioxide sequestration, preparation method and carbon dioxide sequestration method thereof | |
| CN114605121B (en) | Tungsten tailing autoclaved aerated concrete and preparation method thereof | |
| CN115650690A (en) | Novel composite polymer shield muck curing agent | |
| CN111410508A (en) | Preparation method and application of building product based on power plant solid waste and carbon dioxide | |
| CN108706944B (en) | Phosphogypsum light board prepared from barium slag and preparation method thereof | |
| Liu et al. | Sustainable upcycling of artificial lightweight cold-bonded aggregates (ALCBAs) designed by biochar and concrete slurry waste (CSW) into porous carbons materials for CO2 sequestration | |
| CN110698122B (en) | Ecological light filler and preparation method thereof | |
| WO2024077901A1 (en) | Industrial solid waste carbonized and solidified baking-free building block and preparation method therefor | |
| Fang et al. | Carbonation curing of magnesium-coal slag solid waste backfill material: Study on properties of flow, mechanics and carbon sequestration | |
| CN116553895A (en) | Magnesium slag carbon-fixing gelling material and preparation method thereof | |
| Li et al. | Carbon sequestration effects in cementitious composite binder materials under accelerated carbonation: A review | |
| CN113912370B (en) | Preparation method of steel slag brick | |
| Zhang et al. | Preparations of Lake Sediment Geopolymers Using the Alkaline Activation and Their Mechanical Properties | |
| TW201927721A (en) | Method for producing inorganic polymerized cements | |
| Hu et al. | A non-fired ceramsite construction material with enhanced lightweight high strength properties | |
| Li et al. | Development of environment-friendly engineering composite materials utilizing Pisha sandstone and solid waste under different curing conditions |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |