CN114057441A - Device and method for regenerating filling material by using solid waste - Google Patents
Device and method for regenerating filling material by using solid waste Download PDFInfo
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- CN114057441A CN114057441A CN202111572709.5A CN202111572709A CN114057441A CN 114057441 A CN114057441 A CN 114057441A CN 202111572709 A CN202111572709 A CN 202111572709A CN 114057441 A CN114057441 A CN 114057441A
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- 239000000463 material Substances 0.000 title claims abstract description 56
- 238000011049 filling Methods 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000002910 solid waste Substances 0.000 title claims abstract description 21
- 230000001172 regenerating effect Effects 0.000 title claims abstract description 12
- 239000010802 sludge Substances 0.000 claims abstract description 112
- 238000003756 stirring Methods 0.000 claims abstract description 59
- 239000002699 waste material Substances 0.000 claims abstract description 38
- 238000002156 mixing Methods 0.000 claims abstract description 28
- 230000018044 dehydration Effects 0.000 claims abstract description 25
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 25
- 230000008929 regeneration Effects 0.000 claims abstract description 17
- 238000011069 regeneration method Methods 0.000 claims abstract description 17
- 239000002893 slag Substances 0.000 claims abstract description 17
- 239000000843 powder Substances 0.000 claims abstract description 16
- 238000010276 construction Methods 0.000 claims abstract description 12
- 239000002689 soil Substances 0.000 claims abstract description 9
- 238000004056 waste incineration Methods 0.000 claims abstract description 8
- 239000010791 domestic waste Substances 0.000 claims abstract description 6
- 238000007599 discharging Methods 0.000 claims description 35
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- 238000007885 magnetic separation Methods 0.000 claims description 3
- 239000004575 stone Substances 0.000 claims description 3
- 108010059892 Cellulase Proteins 0.000 claims description 2
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- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 2
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- 230000009467 reduction Effects 0.000 description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 2
- 229910052911 sodium silicate Inorganic materials 0.000 description 2
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- VDIQGOWLVYFDOU-UHFFFAOYSA-H [Ca+]O.[Ca+]O.[Ca+]O.[O-]P([O-])([O-])=O Chemical compound [Ca+]O.[Ca+]O.[Ca+]O.[O-]P([O-])([O-])=O VDIQGOWLVYFDOU-UHFFFAOYSA-H 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- CADZRPOVAQTAME-UHFFFAOYSA-L calcium;hydroxy phosphate Chemical compound [Ca+2].OOP([O-])([O-])=O CADZRPOVAQTAME-UHFFFAOYSA-L 0.000 description 1
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- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
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Images
Classifications
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- 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
- C04B28/021—Ash cements, e.g. fly ash cements ; Cements based on incineration residues, e.g. alkali-activated slags from waste incineration ; Kiln dust cements
-
- 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
- C02F11/02—Biological treatment
-
- 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
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
-
- 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
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/0436—Dredged harbour or river sludge
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/16—Waste materials; Refuse from building or ceramic industry
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
-
- 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
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Civil Engineering (AREA)
- Water Supply & Treatment (AREA)
- Hydrology & Water Resources (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Inorganic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Treatment Of Sludge (AREA)
Abstract
本发明公开了一种利用固体废弃物再生填土材料的装置与方法，属于淤泥固化处理技术领域，包括淤泥预处理仓，所述淤泥预处理仓的下端通过管道连接有压滤脱水系统，所述压滤脱水系统通过管道连接有混合搅拌系统，所述混合搅拌系统的左端通过出料管连接有再生集料仓。本发明使用时，利用建筑垃圾再生骨料作为骨架材料，生活垃圾焚烧炉渣再生微粉作为胶凝材料，采用对淤泥先絮凝后固化的淤泥混合固化工艺及配套装置，能够实现疏浚淤泥、垃圾焚烧炉渣再生微粉及建筑垃圾再生骨料的协同处理和资源化利用，生产满足工程填土材料要求的固化土，该处理方法成本低、固化周期短、淤泥处置量大、固化效果显著、耐久性良好。
The invention discloses a device and a method for regenerating filling materials by utilizing solid waste, belonging to the technical field of sludge solidification treatment. The filter press dehydration system is connected with a mixing and stirring system through a pipeline, and the left end of the mixing and stirring system is connected with a regeneration aggregate bin through a discharge pipe. When the invention is used, the recycled aggregate of construction waste is used as the skeleton material, and the recycled fine powder of domestic waste incineration slag is used as the cementitious material. The synergistic treatment and resource utilization of recycled micropowder and recycled aggregate of construction waste can produce solidified soil that meets the requirements of engineering filling materials.
Description
Technical Field
The invention relates to the technical field of sludge solidification treatment, in particular to a device and a method for regenerating a soil filling material by using solid wastes.
Background
It is estimated that the annual amount of dredged sludge cleaned in the pearl triangular region alone is as high as 8000 ten thousand cubic meters. Dredged sludge cannot be directly used as engineering filler, and usually needs to be arranged in a field or is subjected to sludge throwing, so that the problems of land occupation, environmental ecology influence and the like are caused. Dredged sludge mainly consists of clay grains, has high water content, difficult dehydration, low strength and poor soil mechanical property, and contains a large amount of organic matters and heavy metals.
The urban domestic waste incineration is more and more emphasized due to the remarkable reduction effect, the annual production amount of domestic waste incineration slag in China is about 2100 ten thousand tons, and a large amount of waste incineration slag is urgently needed to be reasonably disposed. The waste incineration slag mainly comprises inorganic mineral particles with the particle size of 0.1-5.0 mm, has volcanic ash activity and has the characteristic of being used as a cementing material.
Chinese patent application document CN102941209A discloses a method for curing dredged sludge by blending domestic garbage incineration bottom ash, wherein the weight ratio of the blending amount of the domestic garbage incineration bottom ash to the dredged sludge is 0.3-0.5: 1, the weight ratio of the blending amount of a curing agent to the domestic garbage incineration bottom ash is 0.1-0.2: 1, the unconfined compressive strength of a cured body in the 28-day age is 50-80 kPa, and the cured body does not collapse or collapse when being soaked in water.
Chinese patent CN112341127A discloses a silt curing agent and a production method thereof, wherein the silt curing agent is prepared from sulphoaluminate cement, portland cement, superfine slag micropowder, fly ash, dispersible latex powder, sodium silicate, calcium hydroxy phosphate and modified nano montmorillonite; the curing agent is prepared by mixing sulphoaluminate cement, portland cement, fly ash, sodium silicate and hydroxy calcium phosphate according to a ratio, grinding, sieving with a 200-mesh and 300-mesh sieve, adding superfine slag micro powder, dispersible latex powder and modified nano montmorillonite, and fully mixing uniformly.
Chinese patent CN111348961A discloses a disposal method for producing soil-like waste by using municipal sludge and municipal construction waste, wherein the municipal sludge and the municipal construction waste are mixed and stirred to obtain a sludge-waste mixture; spreading the sludge garbage mixture in a greenhouse, spraying an EM (effective microorganism) strain conditioner on the surface of the sludge garbage mixture, turning the sludge garbage mixture, and stacking when the sludge garbage mixture is dried to a certain water content; spreading the red soil on the stack, sowing corn seeds, crushing the plants after amplification, mixing and stirring the crushed plants together with the sludge garbage mixture and the red soil, and thus achieving the requirements of landscaping soil and bare mountain body restoration soil.
The prior art has at least the following disadvantages:
1. corresponding measures such as particle size thickening, moisture reduction, strength improvement and the like cannot be provided aiming at the characteristics of small particle size, high water content, low strength and the like of the dredged sludge, so that the performance requirements of the filling material are met;
2. the characteristics of various solid wastes cannot be cooperatively utilized to carry out mixed solidification treatment on the dredged sludge, so that the cooperative resource utilization of the solid wastes is realized, and the aims of waste utilization and waste change are fulfilled;
3. the technical scheme has the advantages of complex flow, complex process, difficult realization of mechanical and automatic production and no field applicability.
Disclosure of Invention
The present invention is directed to an apparatus and method for regenerating a soil-filling material using solid waste, so as to solve the above problems in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides an utilize device of solid waste regeneration filling material, includes silt preliminary treatment storehouse, there is filter-pressing dewatering system the lower extreme in silt preliminary treatment storehouse through the pipe connection, filter-pressing dewatering system has mixed mixing system through the pipe connection, the left end that mixes mixing system is connected with regeneration aggregate storehouse through the discharging pipe, the lower extreme of teeter chamber is connected with discharging system.
As a further scheme of the invention, the upper end of the sludge pretreatment bin is fixedly connected with a sludge inlet, the lower end of the sludge inlet is positioned in the sludge pretreatment bin and is fixedly connected with a vibrating grid sieve plate, the inner wall of the sludge pretreatment bin is fixedly connected with an annular wall filter screen, the lower end of the sludge pretreatment bin is also fixedly connected with a liquid collecting box, the left end of the sludge pretreatment bin is connected with a second medicament chamber through a second infusion calandria, the fixed right end of the sludge pretreatment bin is connected with a first medicament chamber through a first infusion calandria, and a first electric control blanking valve is installed on a connecting pipeline between the sludge pretreatment bin and the filter-pressing dehydration system.
As a further scheme of the invention, the filter-pressing dehydration system comprises a single-side water guide pipe, the lower end of the single-side water guide pipe is fixedly connected with a waste liquid collecting box, a composite filter screen is fixed on the inner wall of the single-side water guide pipe, a first spiral rotating shaft is rotatably connected in the single-side water guide pipe, and a first motor is arranged on the right side of the single-side water guide pipe and connected with the first spiral rotating shaft.
As a further scheme of the present invention, the first spiral rotating shaft is a variable diameter spiral rotating shaft, and the diameter of the first spiral rotating shaft gradually increases from left to right.
As a further scheme of the invention, the mixing and stirring system comprises a stirring bin, a stirring rod is rotationally connected in the stirring bin, a second motor is arranged at the lower end of the stirring bin, a pressure sensor is arranged at the bottom end in the stirring bin, and a discharge pipe between the regeneration material collecting bin and the stirring bin is provided with a third electrically-controlled blanking valve.
As a further scheme of the invention, the discharging system comprises a circular discharging pipe, a discharging port is formed at the lower end of the circular discharging pipe, a second spiral rotating shaft is rotatably connected inside the circular discharging pipe, and a third motor is arranged at the left end of the circular discharging pipe and connected with the second spiral rotating shaft.
As a still further aspect of the present invention,
s100: and removing impurities from the dredged sludge. Conveying the dredged sludge to a sludge inlet of a sludge pretreatment bin, removing large-size impurities through a vibrating grid sieve plate, and then feeding the dredged sludge into the sludge pretreatment bin;
s200: and degrading organic matters in the dredged sludge. Opening an electronic control pressurizing valve, allowing a compound enzyme preparation to enter a sludge pretreatment bin to perform degradation reaction with dredged sludge, and decomposing organic matters in the dredged sludge;
s300: and (4) flocculating and dewatering the dredged sludge. Opening a second electric control pressurizing valve, allowing a flocculating agent solution to enter the sludge pretreatment bin to perform flocculation reaction with the dredged sludge, and quickly separating sludge and water in the dredged sludge; the separated water enters a waste liquid collecting box through a circular wall filter screen, and the separated mud enters a filter-pressing dehydration system through a first electric control blanking valve;
s400: and (4) performing filter pressing and dehydration on the dredged sludge. Starting a filter pressing dehydration system to further dehydrate the dredged sludge; under the action of a first spiral rotating shaft with the rotating speed of R1, the dredged sludge is transmitted from a feeding end to a discharging end, the extrusion force is gradually increased, and the extruded water enters a waste liquid collecting box through a composite filter screen; the process lasts for time T1;
s500: the filling materials are mixed and stirred. The dredged sludge after filter pressing and dehydration automatically enters a stirring bin, and the weight of the dredged sludge entering the stirring bin is automatically monitored through a pressure sensor; starting a mixing and stirring system, opening a third electric control blanking valve, enabling substances in a regeneration material collecting bin to enter a stirring bin through a discharging pipe, and mixing and stirring the substances and the dredged sludge subjected to filter pressing and dehydration to form a regeneration filling material;
s600: and discharging the filling material at a constant speed. Opening a second electrically-controlled blanking valve, and feeding the regenerated filling material into a discharging circular pipe; starting the discharging system, enabling a second spiral rotating shaft in the discharging system to rotate at a constant speed, and enabling the regenerated filling material to be conveyed to a discharging port at a constant speed under the action of the second spiral rotating shaft with the rotating speed of R2, so that the regenerated filling material can be put into use; the above process continues for time T2.
As a still further aspect of the invention, the mixed enzyme preparation is prepared from a protease: cellulose, process for producing the same, and process for producing the sameEnzyme: MgSO (MgSO)4: the water is prepared according to the mass ratio of 1:5:4:90, and the pH value of the mixed enzyme preparation needs to be kept at 5.6-6.1;
the flocculant is anionic polyacrylamide with the particle size of 0.6-1.2 mm and the molecular weight of more than 1600 ten thousand, the flocculant solution is prepared from polyacrylamide and water according to the mass ratio of 1:99, and stirring is needed for at least 20min in the dissolving process;
the building waste recycled aggregate is processed from waste concrete, waste mortar, waste stone, waste tiles and the like, and the particle size of the processed recycled aggregate is 10-45 mm;
the household garbage incinerator slag regenerated micro powder is formed by processing household garbage incinerator slag through magnetic separation, grinding and the like, the particle size of the processed regenerated micro powder is smaller than 75 mu m, and the specific surface area is larger than 300m2/kg；
The mass ratio of each component of the regenerated aggregate is as follows: 66% -78% of construction waste recycled aggregate; 22% -34% of household garbage incinerator slag regenerated micro powder, wherein all components of the regenerated aggregate need to be uniformly mixed;
the mixing and stirring system is characterized in that the mass ratio of the materials is as follows: 62 to 72 percent of regenerated aggregate; 28% -38% of dredged sludge;
the filter pressing and dewatering duration T1 of the dredged sludge can be controlled by adjusting the rotating speed R1 of the reducing spiral rotating shaft; the constant-speed discharging duration T2 of the filling material can be controlled by adjusting the rotating speed R2 of the equal-diameter spiral rotating shaft.
Compared with the prior art, the invention has the beneficial effects that:
the invention fully utilizes the soil mechanics characteristics of solid wastes, takes the construction waste recycled aggregate as a framework material, dredged sludge as a pore filling material and the household garbage incinerator recycled micro powder as a cementing material, adopts a process and a matching device for flocculating and then solidifying the dredged sludge, can realize the cooperative treatment and resource utilization of the dredged sludge, the garbage incinerator slag recycled micro powder and the construction wastes, and produces the filling material meeting the engineering requirements, thereby realizing the waste utilization and changing waste into valuable. The treatment method has the advantages of low cost, short period, large treatment amount, good effect and obvious economic, environmental protection and social benefits.
Drawings
Fig. 1 is a view showing a construction of an apparatus for regenerating a soil-filling material using solid waste.
FIG. 2 is a diagram of the steps in an apparatus and method for reclaiming fill material from solid waste.
In the figure: 1. a first electrically controlled pressurizing valve; 2. a sludge inlet; 3. vibrating the grid sieve plate; 4. a first electric control blanking valve; 5. a second electric control pressurizing valve; 6. a first transfusion calandria; 7. a first medication chamber; 8. compounding a filter screen; 9. a first helical shaft; 10. a waste liquid collection box; 11. a first motor; 12. a stirring shaft; 13. a stirring bin; 14. a stirring blade; 15. a pressure sensor; 16. a second motor; 17. a second electric control blanking valve; 18. a discharge pipe; 19. a third electric control blanking valve; 20. a second helical shaft; 21. a discharge circular tube; 22. a discharge port; 23. a third motor; 24. a regeneration aggregate bin; 25. a single-sided aqueduct; 26. a liquid collection tank; 27. a surrounding wall filter screen; 28. a second infusion calandria; 29. medicine chamber II.
Detailed Description
Referring to fig. 1-2, in the embodiment of the present invention, an apparatus and a method for regenerating a filling material using solid waste include a sludge pretreatment bin, a filter-pressing dehydration system is connected to a lower end of the sludge pretreatment bin through a pipeline, the filter-pressing dehydration system is connected to a mixing and stirring system through a pipeline, a regeneration material collecting bin 24 is connected to a left end of the mixing and stirring system through a material discharging pipe 18, and a material discharging system is connected to a lower end of a stirring chamber;
the upper end of the sludge pretreatment bin is fixedly connected with a sludge inlet 2, the lower end of the sludge inlet 2 is positioned in the sludge pretreatment bin and is fixedly connected with a vibrating grid sieve plate 3, the inner wall of the sludge pretreatment bin is fixedly connected with a ring wall filter screen 27, the aperture of the ring wall filter screen 27 is 3000 meshes, the lower end of the sludge pretreatment bin is also fixedly connected with a liquid collecting tank 26, waste water can be collected through the liquid collecting tank 26, the left end of the sludge pretreatment bin is connected with a second medicine chamber 29 through a second infusion calandria 28, a compound enzyme preparation is filled in the second medicine chamber 29, the fixed right end of the sludge pretreatment bin is connected with a first medicine chamber 7 through a first infusion calandria 6, a flocculating agent is filled in the first medicine chamber 7, the first infusion calandria 6 and the second infusion calandria 28 are both formed by uniformly arranging and combining a main pipe body and a plurality of auxiliary pipe bodies, and the distance between the main pipe body and the auxiliary pipe bodies is less than 200mm, the distance between a plurality of auxiliary pipe bodies is also smaller than 200mm, a first electric control pressurizing valve 1 is arranged on the main pipe body of a second infusion calandria 28, a second electric control pressurizing valve 5 is arranged on the main pipe body of a first infusion calandria 6, the conveying speed of liquid can be controlled through the first electric control pressurizing valve 1 and the second electric control pressurizing valve 5, and a first electric control blanking valve 4 is arranged on a connecting pipeline between the sludge pretreatment bin and the filter-pressing dewatering system;
the filter pressing dehydration system comprises a single-side water guide pipe 25, the lower end of the single-side water guide pipe 25 is fixedly connected with a waste liquid collecting box 10, a composite filter screen 8 is fixed on the inner wall of the single-side water guide pipe 25, the inner side of the composite filter screen 8 is geotextile, the outer side of the composite filter screen is an annular filter screen, the aperture of the annular filter screen is 3000 meshes, a first spiral rotating shaft 9 is rotatably connected in the single-side water guide pipe 25, the first spiral rotating shaft 9 is a reducing spiral rotating shaft, the diameter of the first spiral rotating shaft 9 is gradually increased from left to right, the diameter of the right end of the first spiral rotating shaft 9 is equal to twice of the diameter of the left end, a first motor 11 is arranged on the right side of the single-side water guide pipe 25, and the first motor 11 is connected with the first spiral rotating shaft 9;
the mixing and stirring system comprises a stirring bin 13, a stirring rod is rotationally connected in the stirring bin 13, the stirring rod comprises a stirring shaft 12, a stirring blade 14 is fixedly connected on the stirring shaft 12, a second motor 16 is arranged at the lower end of the stirring bin 13, an output shaft of the second motor 16 is connected with the stirring shaft 12, a pressure sensor 15 is arranged at the bottom end in the stirring bin 13, a discharge pipe 18 between a regeneration collecting bin 24 and the stirring bin 13 is provided with a third electric control blanking valve 19, and household garbage incinerator slag regeneration micro powder and building garbage regeneration aggregate are filled in the regeneration collecting bin 24;
the discharging system comprises a discharging circular tube 21, a second electronic control discharging valve 17 is fixedly connected between the discharging circular tube 21 and the stirring bin 13, a discharging hole 22 is formed in the lower end of the discharging circular tube 21, a second spiral rotating shaft 20 is connected to the inside of the discharging circular tube 21 in a rotating mode, a third motor 23 is arranged at the left end of the discharging circular tube 21, and the third motor 23 is connected with the second spiral rotating shaft 20.
The method comprises the following steps:
s100: and removing impurities from the dredged sludge. The dredged sludge is conveyed to a sludge inlet 2 of a sludge pretreatment bin, and enters the sludge pretreatment bin after large-size impurities are removed by a vibrating grid sieve plate 3.
S200: and degrading organic matters in the dredged sludge. And opening the first electric control pressurizing valve 1, allowing the complex enzyme preparation to enter the sludge pretreatment bin to perform degradation reaction with the dredged sludge, and decomposing organic matters in the dredged sludge.
S300: and (4) flocculating and dewatering the dredged sludge. Opening a second electric control pressurizing valve 5, allowing a flocculating agent solution to enter the sludge pretreatment bin to perform flocculation reaction with the dredged sludge, and quickly separating sludge and water in the dredged sludge; the separated water enters the waste liquid collecting box 10 through the annular wall filter screen 27, and the separated mud enters a filter-pressing dehydration system through the first electric control blanking valve 4.
S400: and (4) performing filter pressing and dehydration on the dredged sludge. Starting a filter pressing dehydration system to further dehydrate the dredged sludge; under the action of a first spiral rotating shaft 9 with the rotating speed of R1, the dredged sludge is transmitted from the feeding end to the discharging end, the extrusion force is gradually increased, and the extruded water enters a waste liquid collecting box 10 through a composite filter screen 8; the above process continues for time T1.
S500: the filling materials are mixed and stirred. The dredged sludge after the filter pressing and dehydration automatically enters the stirring bin 13, and the weight of the dredged sludge entering the stirring bin 13 is automatically monitored through the pressure sensor 15; and starting the mixing and stirring system, opening the third electrically-controlled blanking valve 19, feeding the substances in the regeneration material collecting bin 24 into the stirring bin 13 through the discharge pipe 18, and mixing and stirring the substances with the dredged sludge subjected to filter pressing and dehydration to form the regenerated filling material.
S600: and discharging the filling material at a constant speed. Opening a second electrically-controlled blanking valve 17, and feeding the regenerated filling material into a circular discharging pipe 21; starting the discharging system, enabling the second spiral rotating shaft 20 in the discharging system to rotate at a constant speed, and under the action of the second spiral rotating shaft 20 with the rotating speed of R2, enabling the regenerated filling material to be conveyed to the discharging port 22 at a constant speed, and then being put into use; the process lasts for time T2;
the mixed enzyme preparation is prepared from protease: cellulase: MgSO (MgSO)4: the water is prepared according to the mass ratio of 1:5:4:90, and the pH value of the mixed enzyme preparation needs to be kept at 5.6-6.1.
The flocculant is anionic polyacrylamide with the particle size of 0.6-1.2 mm and the molecular weight of more than 1600 ten thousand, the flocculant solution is prepared from polyacrylamide and water according to the mass ratio of 1:99, and stirring is needed for at least 20min in the dissolving process.
The construction waste recycled aggregate is formed by processing waste concrete, waste stone, waste tiles and the like, and the particle size of the processed recycled aggregate is 10-45 mm.
The household garbage incinerator slag regenerated micro powder is formed by processing household garbage incinerator slag through magnetic separation, grinding and the like, the particle size of the processed regenerated micro powder is smaller than 75 mu m, and the specific surface area is larger than 300m2/kg。
The mass ratio of each component of the regenerated aggregate is as follows: 66% -78% of construction waste recycled aggregate; 22% -34% of the household garbage incinerator slag regenerated micro powder, wherein all components of the regenerated aggregate need to be uniformly mixed.
The mixing and stirring system is characterized in that the mass ratio of the materials is as follows: 62 to 72 percent of regenerated aggregate; 28 to 38 percent of dredged sludge.
The filter pressing and dewatering duration T1 of the dredged sludge can be controlled by adjusting the rotating speed R1 of the reducing spiral rotating shaft; the constant-speed discharging duration T2 of the filling material can be controlled by adjusting the rotating speed R2 of the equal-diameter spiral rotating shaft.
Claims (8)
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| CN115536224A (en) * | 2022-09-28 | 2022-12-30 | 中建安装集团有限公司 | Mineralized regenerated micro powder-industrial waste residue synergistic solidification sludge automation equipment and method |
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Application publication date: 20220218 |