CN111408471A - Construction waste treatment method - Google Patents
Construction waste treatment method Download PDFInfo
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- CN111408471A CN111408471A CN202010235719.9A CN202010235719A CN111408471A CN 111408471 A CN111408471 A CN 111408471A CN 202010235719 A CN202010235719 A CN 202010235719A CN 111408471 A CN111408471 A CN 111408471A
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- 238000004140 cleaning Methods 0.000 claims abstract description 38
- 239000002245 particle Substances 0.000 claims abstract description 36
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- 238000005188 flotation Methods 0.000 claims abstract description 18
- 239000010813 municipal solid waste Substances 0.000 claims abstract description 16
- 238000007885 magnetic separation Methods 0.000 claims abstract description 14
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Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
- B03B9/06—General arrangement of separating plant, e.g. flow sheets specially adapted for refuse
- B03B9/061—General arrangement of separating plant, e.g. flow sheets specially adapted for refuse the refuse being industrial
- B03B9/065—General arrangement of separating plant, e.g. flow sheets specially adapted for refuse the refuse being industrial the refuse being building rubble
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/02—Settling tanks with single outlets for the separated liquid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B11/00—Feed or discharge devices integral with washing or wet-separating equipment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
- B03B5/28—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B11/00—Arrangement of accessories in apparatus for separating solids from solids using gas currents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B4/00—Separating solids from solids by subjecting their mixture to gas currents
- B07B4/02—Separating solids from solids by subjecting their mixture to gas currents while the mixtures fall
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
-
- 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
- Y02W30/20—Waste processing or separation
-
- 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
- Y02W30/52—Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly
-
- 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
- Y02W30/58—Construction or demolition [C&D] waste
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The present disclosure provides a construction waste treatment method, including: crushing: crushing the construction waste after being manually sorted into particles with a preset particle size by a crusher; magnetic separation: removing ferromagnetic impurities from the crushed construction waste particles by a magnetic separation device; high-pressure washing: washing the magnetically-separated construction waste particles in a waste washing tank at high pressure to form a cleaning solution, and removing mud on the surface of the construction waste; flotation: removing floating objects on the surface of the cleaning liquid in the eliminated washing tank by a flotation device; conveying: conveying the building garbage particles precipitated at the bottom of the jigging tank to the winnowing component through a conveying device; and winnowing: the construction waste particles blow out the light objects through the air separation component arranged at the tail end of the conveying device by wind power, and the light objects are removed. The construction waste treatment method can obtain high-quality construction aggregate, and is simple in structure, compact in design, water-saving and environment-friendly.
Description
Technical Field
The disclosure relates to the field of material crushing, in particular to a construction waste treatment method.
Background
The construction waste refers to residue, waste soil, waste material, sludge and other wastes generated in the process of constructing, laying or dismantling and repairing various buildings, structures, pipe networks and the like by construction and construction units or individuals.
The construction waste can be classified into slag, concrete blocks, broken stone blocks, broken bricks and tiles, waste mortar, slurry, asphalt blocks, waste plastics, waste metals, waste bamboo and wood and the like according to the composition. At present, newly generated building garbage in China is a shocking number. However, most of the construction wastes are not treated, and are transported to the suburbs or villages by construction units, and are piled or buried in the open air, so that a large amount of construction expenses such as land acquisition expenses and garbage clearing and transporting expenses are consumed, and meanwhile, the problems of scattering, dust, sand flying and the like in the clearing and piling processes cause serious environmental pollution.
In fact, rubbish such as concrete piece, rubble piece, brick and tile piece among the foretell building rubbish can carry out the reutilization after handling, can effectually save construction cost and refuse treatment cost, but similar building rubbish processing apparatus in present stage can not carry out effectual washing to above-mentioned building rubbish, wherein probably mix with impurity such as waste plastics, useless bamboo wood simultaneously, is not qualified building material, can not directly use it.
Disclosure of Invention
In order to solve at least one of the above technical problems, the present disclosure provides a construction waste treatment method that can obtain high-quality construction aggregate.
According to one aspect of the disclosure, a construction waste treatment method includes:
crushing: crushing the construction waste after being manually sorted into particles with a preset particle size by a crusher;
magnetic separation: removing ferromagnetic impurities from the crushed construction waste particles by a magnetic separation device;
high-pressure washing: washing the magnetically-separated construction waste particles in a waste washing tank at high pressure to form a cleaning solution, and removing mud on the surface of the construction waste;
flotation: removing floating objects on the surface of the cleaning liquid in the eliminated washing tank by a flotation device;
conveying: conveying the building garbage particles precipitated at the bottom of the jigging tank to the winnowing component through a conveying device; and
winnowing: the construction waste particles blow out the light objects through the air separation component arranged at the tail end of the conveying device by wind power, and the light objects are removed.
According to at least one embodiment of the present disclosure, further comprising a regeneration process,
the regeneration comprises the steps of draining the cleaning liquid in the jigging tank into a sedimentation tank, settling mud in the sedimentation tank to the bottom of the sedimentation tank, and filtering the mud by a mud filter press to obtain a filtrate; and
and the filtered clear liquid enters the jigging box through a high-pressure pumping device to be washed at high pressure.
According to at least one embodiment of the present disclosure, the settling tank includes a plurality of,
the cleaning liquid drained from the jigging box is sequentially precipitated step by step through a plurality of sedimentation tanks, so that the filtered liquid pumped by high pressure meets the water quality standard.
According to at least one embodiment of the present disclosure, further comprising a slurry delivery,
and when the settled slurry in the settling tank reaches the first position, conveying the settled slurry to the slurry filter press by the slurry conveying device.
According to at least one embodiment of the present disclosure, further comprising mud storage,
the slurry in the plurality of settling ponds is conveyed to a slurry storage device for temporary storage, and the slurry storage device continuously provides slurry supply for the slurry filter press.
According to at least one embodiment of the present disclosure, further comprising adding a medicament,
and adding a mud precipitator into the cleaning liquid in the plurality of sedimentation tanks and mixing, wherein the proportion of the mud precipitator to the cleaning liquid is 0.1-0.5%.
According to at least one embodiment of the present disclosure, a partition plate is disposed between the plurality of settling ponds, a settling filtration port is disposed at an upper end of the partition plate, and the plurality of settling ponds are communicated with each other through the settling filtration port.
According to at least one embodiment of the present disclosure, during the high pressure flushing,
the high-pressure nozzles are arranged on the side wall of the jigging box, the high-pressure washing direction is obliquely and upwards arranged, and the inclination angle is 40-70 degrees.
According to at least one embodiment of the present disclosure, in the flotation process,
the flotation device comprises a rotating shaft, a rotating wheel rotating around the rotating shaft, a motor and a speed reducer, wherein the motor is connected with the input end of the speed reducer, the output end of the speed reducer is fixedly connected with the rotating shaft, and a plurality of slag scooping plates are uniformly arranged in the circumferential direction of the rotating wheel; and
the rotating wheel also comprises two hubs, and the slag salvaging plate comprises a connecting plate and a slag salvaging sheet; the connecting plate presss from both sides and locates two between the wheel hub, drag for the sediment piece to be fixed in the connecting plate, drag for the sediment piece part to extend to the wheel hub is followed outside the axial projection of pivot.
According to at least one embodiment of the present disclosure, the air classification assembly includes an air classifier and bins fixedly disposed on opposite sides of the air classifier.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the disclosure and together with the description serve to explain the principles of the disclosure.
Fig. 1 is a schematic structural view of a construction waste treatment apparatus according to the present disclosure.
Fig. 2 is a top view of a construction waste disposal device according to the present disclosure.
Fig. 3 is a schematic view of a dragveyer of a construction waste flotation device according to the present disclosure.
FIG. 4 is a schematic illustration of a flow of cleaning fluid in a settling tank, according to one embodiment of the present disclosure.
Reference numerals: 1-a material conveying assembly; 2-eliminating and washing the components; 3-a float cleaning assembly; 4-cleaning the finished product conveying assembly; 5-a winnowing component; 6-high pressure water pump; 7-a sedimentation tank; 71-a sediment filter port; 8-a screw conveyor; 10-a main frame; 11-fishing a slag plate; 111-a connection plate; 112-slag removing; 12-a hub; 13-a reducer; 14-a motor; 141-ear; 15-a scaffold; 151-support beam; 152-a bracket; 16-rotating shaft.
Detailed Description
The present disclosure will be described in further detail with reference to the drawings and embodiments. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limitations of the present disclosure. It should be further noted that, for the convenience of description, only the portions relevant to the present disclosure are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict. The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
After the construction waste is crushed by the crusher, the construction waste is conveyed to the jigging and washing assembly to be washed, silt and the like in the construction waste are washed, other miscellaneous waste plastics, waste bamboo wood and other light impurities are removed by the winnowing assembly, and the crusher can be further utilized to carry out secondary crushing and screening to obtain qualified construction materials which can be recycled.
According to a first embodiment of the present disclosure, there is provided a construction waste treatment method including: crushing: crushing the construction waste after being manually sorted into particles with a preset particle size by a crusher; magnetic separation: removing ferromagnetic impurities from the crushed construction waste particles by a magnetic separation device; high-pressure washing: washing the magnetically-separated construction waste particles in a waste washing tank at high pressure to form a cleaning solution, and removing mud on the surface of the construction waste; flotation: removing floating objects on the surface of the cleaning liquid in the eliminated washing tank by a flotation device; conveying: conveying the building garbage particles precipitated at the bottom of the jigging tank to the winnowing component through a conveying device; and winnowing: the construction waste particles blow out the light objects through the air separation component arranged at the tail end of the conveying device by wind power, and the light objects are removed.
Optionally, during the crushing process, a part of the impurities with large size and easy identification can be removed through manual sorting, so that the magnetic separation, air separation and flotation pressure in the subsequent process are reduced. The construction waste is generally large in size, and is crushed into construction waste particles with a predetermined particle size, such as a particle size of not more than 100mm, optionally not more than 50mm, by a crusher, so that the construction waste is easy to process later.
Optionally, the magnetic separation process is to adsorb metal substances in the broken construction waste particles on the magnetic separation assembly through magnetic force, the magnetic separation assembly can be arranged on the conveyor belt, the metal is adsorbed through magnetic force, then the metal is conveyed to one side of the conveyor belt through the rotating device and collected, and optionally, secondary magnetic separation can be arranged for more completely removing the metal.
Optionally, the building rubbish granule carries out high pressure flushing in jigging the washing case and forms the washing liquid, gets rid of the mud on building rubbish surface, and high pressure flushing water directly washes the building rubbish granule that drops from the conveyer belt, because the liquid level in jigging the washing case is generally higher than the washing nozzle, and high pressure water flushing has certain stirring effect for building rubbish clearance is cleaner. The utility model discloses a washing tank, including the washing tank, the washing tank includes two shovel type boxes, wherein inlayer box mainly used high pressure washing construction waste granule, prevent that the granule dispersion from influencing the cleaning performance, and outer box is used for storing the washing liquid after the washing, one side (one side on shovel type inclined plane) tip that high pressure washing district was kept away from to outer box still is provided with the drainage funnel, when the washing liquid level is higher than outer box, the washing liquid can spill over and from drainage to the sedimentation tank in the drainage funnel, and the mud of outer bottom of the case portion is then carried the sedimentation tank in from the transport port that sets up in the bottom through spiral delivery mechanism.
Optionally, one end of the conveying device is arranged at the bottom of the high-pressure washing area, and the other end of the conveying device obliquely extends out of the outer box body upwards along the inner box body, so that the building particles at the bottom of the high-pressure washing area are conveyed to the air separation area.
Optionally, the winnowing component comprises a winnowing machine and a bin, the winnowing machine comprises a fan and a winnowing shell (with holes), and the bin is arranged on the opposite side of the winnowing shell and used for collecting the light materials blown out by the fan and preventing the light materials blown out by the winnowing from scattering.
Optionally, the method also comprises a regeneration process, and clear water in the cleaning solution can be reused in a precipitation mode, so that the purposes of circulating water conservation and energy conservation are achieved. And discharging the upper-layer cleaning liquid in the jigging tank into the sedimentation tank from the drainage funnel, discharging the slurry precipitated in the cleaning liquid to a slurry filter press through a conveying device, filtering the slurry by the slurry filter press to obtain a filtrate, and feeding the filtrate meeting the pumping standard into the jigging tank through a high-pressure pumping device to perform high-pressure washing on the building garbage particles.
Optionally, in order to obtain water quality meeting the pumping requirement, a plurality of sedimentation tanks may be provided, and the cleaning liquid led out from the eliminated washing tank sequentially passes through the plurality of sedimentation tanks for sedimentation step by step. Optionally, be provided with the baffle between a plurality of sedimentation tanks, the upper end of baffle is provided with the sediment filtration mouth, through depositing intercommunication between the filtration mouth a plurality of sedimentation tanks. The upper end of the partition board is provided with the communicated sedimentation filter port, so that the insufficient middle-lower layer cleaning liquid is precipitated and is prevented from flowing into the next sedimentation tank as much as possible, and only the sufficient upper layer cleaning liquid is allowed to be precipitated and is allowed to enter the next sedimentation tank, thereby ensuring that the water quality finally entering the high-pressure pumping equipment meets the requirements.
Optionally, a mud precipitating agent is added to the wash liquor in the plurality of settling tanks and mixed, the ratio of mud precipitating agent to wash liquor being 0.1-0.5%, optionally 0.2-0.4%, preferably 0.2-0.3%. The mud precipitator comprises an anionic or nonionic sewage flocculant, can play a role in clarification and purification and sedimentation flocculation, and can also be stirred and the like to accelerate the sedimentation of the mud precipitator when the mud precipitator is added.
Optionally, a slurry transport process is included, wherein when the settled slurry in the settling tanks reaches a certain height, for example, the first position, the settled slurry in each settling tank is transported to the slurry filter press by the slurry transport device. Optionally, the slurry in the sedimentation tanks is conveyed to a slurry storage device for temporary storage, and the slurry storage device can continuously supply slurry to the slurry filter press, so that the filter press can continuously operate without intermittent production, and the filter press efficiency is improved.
Optionally, the high-pressure nozzles in the high-pressure washing area are arranged on the side wall of the jigging tank, and the high-pressure washing direction is obliquely upwards arranged, the inclination angle is 40-70 degrees, optionally 50-60 degrees. The flushing effect can be optimized by adjusting the injection angle of the injection hole on the injection pipe. When the spraying direction of the spraying hole is inclined upwards by 60 degrees, the sprayed water flow can achieve better stirring effect and washing effect.
Optionally, in the flotation process, the flotation device comprises a rotating shaft, a rotating wheel rotating around the rotating shaft, a motor and a speed reducer, the motor is connected with the input end of the speed reducer, the output end of the speed reducer is fixedly connected with the rotating shaft, and a plurality of slag scooping plates are uniformly arranged in the circumferential direction of the rotating wheel; the rotating wheel also comprises two hubs, and the slag salvaging plate comprises a connecting plate and a slag salvaging sheet; the connecting plate presss from both sides and locates two between the wheel hub, drag for the sediment piece and be fixed in the connecting plate, drag for the sediment piece part to extend to the wheel hub outside along the axial projection of pivot.
The above-described treatment method will be described in detail with reference to specific examples.
The schematic view of the construction waste disposal apparatus shown in fig. 1-2 comprises: breaker (not shown in the figure), material conveying component 1, it washes subassembly 2 to eliminate, wash finished product conveying component 4, selection by winnowing subassembly 5 and main frame 10, material conveying component 1, it washes subassembly 2 to eliminate, it all fixes the setting on main frame 10 to wash finished product conveying component 4 and selection by winnowing subassembly 5, the discharge gate setting of breaker is in the top of the feed inlet of material conveying component 1, the discharge gate setting of material conveying component 1 is in the top of eliminating washing subassembly 2, the feed end setting of wasing finished product conveying component 4 is in eliminating washing subassembly 2, the feed end of selection by winnowing subassembly 5 is connected with the discharge end of wasing finished product conveying component 4. The material conveying assembly 1 and the cleaning finished product conveying assembly 4 are both belt conveyors, the material conveying assembly 1 and the cleaning finished product conveying assembly 4 are both obliquely arranged, and the horizontal position of the feeding end of the material conveying assembly 1/the cleaning finished product conveying assembly 4 is lower than that of the discharging end of the material conveying assembly.
The crusher is not shown in the figure, because it is a prior art, and it is only necessary to crush the construction waste. Meanwhile, before the device is used, construction waste needs to be primarily screened, and waste (such as asphalt blocks, waste bamboo wood, waste metal and the like) which cannot be secondarily utilized as construction materials is primarily screened. Then carry out the breakage through the breaker, after the breakage was accomplished, transported the construction waste after the breakage to the top of eliminating washing subassembly 2 through material conveying subassembly 1 to eliminate washing subassembly 2.
High pressure water pump 6 pumps high pressure water from the outlet pipe hole for water spraying, forms similar boiling water and carries out high pressure washing, washs the building rubbish that falls into the washing incasement, and the high pressure nozzle setting in high pressure washing district is on the lateral wall of eliminating the washing case, can make the rivers that spray reach better stirring effect and washing effect when the injection direction tilt up 60 degrees of jet hole. Meanwhile, silt, slurry and the like after cleaning sink into the bottom of the cleaning box, and mixed light wood, plastic and the like float on the water surface of the cleaning box. The light materials are fished out to the outside through a flotation device, which is shown in fig. 3 and comprises a rotating shaft 16, a rotating wheel rotating around the rotating shaft 16, a motor 14, a speed reducer 13 and a bracket 15. The motor 14 is connected with the input end of the speed reducer 13, and the output end of the speed reducer 13 is fixedly connected with the rotating shaft 16, so that the output rotating speed from the motor 14 to the rotating wheel is reduced, and the output torque of the motor 14 is improved. The reducer 13 or the motor 14 needs to be fixedly connected with an external fixed structure, so that the motor 14 and the reducer 13 do not rotate along with the rotation of the rotating shaft 16. Further, the motor 14 is provided with a tab 141, and the motor 14 is fixed to the external structure by the tab 141. The reducer 13 is adapted to be fixedly connected with the bracket 15 to ensure stability of the reducer 13.
After the cleaned materials are output from the cleaning box, draining and natural evaporation are carried out on the cleaned finished product conveying assembly 4, and finally the cleaned materials move to an inclined plane of a winnowing machine, strong wind in a winnowing shell hole is output through a fan, the strong wind is blown out from the winnowing hole, and small sawdust and plastic sheets in the materials are further removed to form qualified building materials. The discharging bin is arranged opposite to the winnowing machine and used for collecting small sawdust and plastic sheets and avoiding environment pollution, and the discharging bin is an optional part and does not need to be explained in detail until the small sawdust and the plastic sheets are prevented from flying around.
According to at least one embodiment of the present disclosure, as shown in fig. 4, the cleaning liquid enters the sedimentation tanks 7 through the drainage funnel, and the sedimentation filtering ports 71 are formed at the upper parts of the partition plates between the plurality of sedimentation tanks 7, so that the middle and lower layer cleaning liquid which is not precipitated sufficiently does not flow into the next sedimentation tank as much as possible, and only the upper layer cleaning liquid which is precipitated sufficiently is allowed to enter the next sedimentation tank, thereby ensuring that the water quality finally entering the high-pressure pumping equipment meets the requirements. In order to quickly obtain the cleaning solution meeting the water quality requirement, 0.2-0.3% of mud precipitator by weight ratio can be added. When the settled sludge in the settling tank reaches a certain height, for example the first position, the settled sludge in each settling tank 7 is conveyed to the sludge press by the sludge conveying device. Optionally, the slurry in the sedimentation tanks is conveyed to a slurry storage device for temporary storage, and the slurry storage device can continuously supply slurry to the slurry filter press, so that the filter press can continuously operate without intermittent production, and the filter press efficiency is improved.
The working process of the construction waste treatment method of the present disclosure is explained below. The construction waste is manually selected to remove larger or easily identified impurities, then is crushed into construction waste particles meeting the standard particle size through a crusher, the construction waste particles are placed into a hopper and are conveyed into a jigging and washing component 2 through a material conveying component 1, wherein a magnetic separation device can be arranged to remove metal impurities in the conveying process of the material conveying component 1, the construction waste particles enter a high-pressure flushing area, a high-pressure water pump 6 pumps water to the high-pressure flushing area to flush the construction waste particles through high-pressure flushing and stirring, the flushed construction waste particles are conveyed to a winnowing component 5 to be winnowed, and light materials, such as plastics, fibers and other impurities, are removed. The floating materials in the eliminated washing component 2 are filtered to remove impurities with small specific gravity such as wood, plastics and the like through a flotation device. Cleaning liquid and mud settled at the bottom enter a sedimentation tank 7 through a conveying device, water meeting the standard is obtained through sedimentation of the multiple sedimentation tanks 7, and the water is pumped to a high-pressure water flushing area through a high-pressure water pump 6 to be flushed, so that water circulation is completed. And the slurry in the sedimentation tank is conveyed to a collection device or a filter press by a conveying device to remove water to obtain the slurry.
In the description herein, reference to the description of the terms "one embodiment/mode," "some embodiments/modes," "example," "specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment/mode or example is included in at least one embodiment/mode or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to be the same embodiment/mode or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments/modes or examples. Furthermore, the various embodiments/aspects or examples and features of the various embodiments/aspects or examples described in this specification can be combined and combined by one skilled in the art without conflicting therewith.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
It will be understood by those skilled in the art that the foregoing embodiments are merely for clarity of illustration of the disclosure and are not intended to limit the scope of the disclosure. Other variations or modifications may occur to those skilled in the art, based on the foregoing disclosure, and are still within the scope of the present disclosure.
Claims (10)
1. A construction waste treatment method is characterized by comprising the following steps:
crushing: crushing the construction waste after being manually sorted into particles with a preset particle size by a crusher;
magnetic separation: removing ferromagnetic impurities from the crushed construction waste particles by a magnetic separation device;
high-pressure washing: washing the magnetically-separated construction waste particles in a waste washing tank at high pressure to form a cleaning solution, and removing mud on the surface of the construction waste;
flotation: removing floating objects on the surface of the cleaning liquid in the eliminated washing tank by a flotation device;
conveying: conveying the building garbage particles precipitated at the bottom of the jigging tank to the winnowing component through a conveying device; and
winnowing: the construction waste particles blow out the light objects through the air separation component arranged at the tail end of the conveying device by wind power, and the light objects are removed.
2. The construction waste treatment method according to claim 1, further comprising a regeneration process,
the regeneration comprises the steps of draining the cleaning liquid in the jigging tank into a sedimentation tank, settling mud in the sedimentation tank to the bottom of the sedimentation tank, and filtering the mud by a mud filter press to obtain a filtrate; and
and the filtered clear liquid enters the jigging box through a high-pressure pumping device to be washed at high pressure.
3. The construction waste treatment method according to claim 2, wherein the settling tank includes a plurality of tanks,
the cleaning liquid drained from the jigging box is sequentially precipitated step by step through a plurality of sedimentation tanks, so that the filtered liquid pumped by high pressure meets the water quality standard.
4. The construction waste disposal method according to claim 3, further comprising slurry delivery,
and when the settled slurry in the settling tank reaches the first position, conveying the settled slurry to the slurry filter press by the slurry conveying device.
5. The construction waste disposal method according to claim 4, further comprising storing the slurry,
the slurry in the plurality of settling ponds is conveyed to a slurry storage device for temporary storage, and the slurry storage device continuously provides slurry supply for the slurry filter press.
6. The construction waste disposal method according to claim 3, further comprising adding a chemical,
and adding a mud precipitator into the cleaning liquid in the plurality of sedimentation tanks and mixing, wherein the proportion of the mud precipitator to the cleaning liquid is 0.1-0.5%.
7. The construction waste disposal method according to claim 3, wherein a partition is provided between the plurality of settling ponds, and a settling filtration port is provided at an upper end of the partition, through which the plurality of settling ponds communicate with each other.
8. The construction waste disposal method according to claim 1, wherein, in said high-pressure washing process,
the high-pressure nozzles are arranged on the side wall of the jigging box, the high-pressure washing direction is obliquely and upwards arranged, and the inclination angle is 40-70 degrees.
9. The construction waste treatment method according to claim 1, wherein, in the flotation process,
the flotation device comprises a rotating shaft, a rotating wheel rotating around the rotating shaft, a motor and a speed reducer, wherein the motor is connected with the input end of the speed reducer, the output end of the speed reducer is fixedly connected with the rotating shaft, and a plurality of slag scooping plates are uniformly arranged in the circumferential direction of the rotating wheel; and
the rotating wheel also comprises two hubs, and the slag salvaging plate comprises a connecting plate and a slag salvaging sheet; the connecting plate presss from both sides and locates two between the wheel hub, drag for the sediment piece to be fixed in the connecting plate, drag for the sediment piece part to extend to the wheel hub is followed outside the axial projection of pivot.
10. The construction waste disposal method of claim 1, wherein said air separation assembly comprises an air separator and a bin, said bin being fixedly disposed at an opposite side of said air separator.
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| CN118616202A (en) * | 2024-06-26 | 2024-09-10 | 中建西部建设发展(北京)有限公司 | Light material removal system for construction waste recycled aggregate and recycled aggregate preparation method |
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