CN113634580A - Environment-friendly treatment method for construction waste - Google Patents
Environment-friendly treatment method for construction waste Download PDFInfo
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- CN113634580A CN113634580A CN202110871661.1A CN202110871661A CN113634580A CN 113634580 A CN113634580 A CN 113634580A CN 202110871661 A CN202110871661 A CN 202110871661A CN 113634580 A CN113634580 A CN 113634580A
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- 238000010276 construction Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000010813 municipal solid waste Substances 0.000 claims abstract description 119
- 239000002184 metal Substances 0.000 claims abstract description 49
- 239000004567 concrete Substances 0.000 claims abstract description 40
- 239000002023 wood Substances 0.000 claims abstract description 39
- -1 polypropylene Polymers 0.000 claims abstract description 29
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- 239000004033 plastic Substances 0.000 claims abstract description 27
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Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
-
- 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
-
- 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
- Y02W30/78—Recycling of wood or furniture waste
Abstract
The invention discloses an environment-friendly treatment method of construction waste, which comprises the following steps: step 1: sorting out light garbage in the construction garbage to obtain primary construction garbage; step 2: sorting out plastic and wood mixed garbage in the primary building garbage to obtain metal and concrete mixed garbage; and step 3: sorting out the metal-containing garbage in the metal and concrete mixed garbage to obtain concrete garbage; separating the waste steel bars from the metal-containing garbage; and 4, step 4: preparing the concrete garbage obtained in the step 3 into recycled aggregate; and 5: sorting the light garbage in the step 1 and the polypropylene, polyethylene and polyvinyl chloride plastic garbage and wood garbage in the plastic and wood mixed garbage in the step 2 respectively; step 6: and (5) preparing the garbage sorted in the step (5) into the wood-plastic composite material. The invention can separate and recycle the waste steel bars on the basis of classifying the construction waste, thereby reducing the waste of the waste steel bars.
Description
Technical Field
The invention relates to the field of construction waste treatment. More particularly, the invention relates to an environment-friendly treatment method of construction waste.
Background
With the acceleration of industrialization and urbanization processes, a large amount of construction waste is generated in building removal, old house reconstruction and municipal reconstruction projects, and the quantity of the construction waste in China accounts for more than 1/3 of the total quantity of the municipal waste. If the construction waste is not treated but directly stacked or buried, legal landfill sites are less and more distant along with the lapse of time, the waste is more and more difficult to be consumed, and the air, soil and underground water are polluted to different degrees. However, most of the research on the treatment of construction wastes focuses on recycling the waste soil, waste concrete, waste masonry, etc., and the method generally includes the steps of firstly, crushing the wastes in different crushers in stages, granulating to obtain recyclable aggregates, and then manufacturing the recycled aggregates into building materials such as concrete, mortar, building blocks, wallboards, floor tiles, etc. with corresponding strength grades. If contain the reinforcing bar in this type of rubbish, for preventing that the reinforcing bar from damaging the breaker, need cut the reinforcing bar weak point through the manual work earlier, break again, caused a large amount of wastes of reinforcing bar or need organize manpower and materials alone and sort reinforced concrete class rubbish, independent processing retrieves again.
Disclosure of Invention
An object of the present invention is to solve at least the above problems and to provide at least the advantages described later.
To achieve these objects and other advantages in accordance with the purpose of the invention, there is provided a method for environmentally treating construction waste, comprising the steps of:
step 1: sorting out light garbage in the construction garbage to obtain primary construction garbage;
step 2: sorting out plastic and wood mixed garbage in the primary building garbage to obtain metal and concrete mixed garbage;
and step 3: sorting out the metal-containing garbage in the metal and concrete mixed garbage to obtain concrete garbage; the metal-containing garbage is put into a steel bar separation device to break away the concrete on the waste steel bars and separate the waste steel bars;
and 4, step 4: sequentially feeding the concrete garbage obtained in the step 3 into a crusher and a screening machine to obtain recycled aggregate;
and 5: sorting the light garbage in the step 1 and the polypropylene, polyethylene and polyvinyl chloride plastic garbage and wood garbage in the plastic and wood mixed garbage in the step 2 respectively;
step 6: and (3) grinding the wood garbage sorted in the step (5) into wood powder, and then putting the wood powder and the plastic garbage of polypropylene, polyethylene and polyvinyl chloride sorted in the step (5) into a forming machine together to obtain the wood-plastic composite material.
Preferably, the air-sorting device is used for sorting the light garbage in the construction garbage in the step 1.
Preferably, the water sorting device is used for sorting the plastic and wood mixed garbage in the primary construction garbage in the step 2.
Preferably, the water-sorting device comprises a water tank filled with water and sterilizing liquid and a fishing device.
Preferably, the reinforcing bar separating apparatus includes:
the conveying device is arranged on each of two sides of the conveying table;
the hood is of an inverted structure, and the lower end face of the hood is fixedly connected with the conveying table;
the crushing device is arranged in the hood and comprises a rolling device, a crushing plate and a hydraulic cylinder; the bottom surface of the crushing plate is in gear transmission with the conveying device, and crushing bulges are arranged on the upper surface of the crushing plate and the periphery of the rolling device; the hydraulic cylinder is fixedly arranged on the machine cover, and the telescopic end of the hydraulic cylinder is fixedly connected with the rolling device so as to drive the rolling device to vertically move up and down above the conveying table;
the metal sorting device comprises a first conveyor belt and a second conveyor belt, wherein the first conveyor belt is connected with the tail end of the conveying table, one side of the first conveyor belt is provided with a plurality of first metal sorting devices, each first metal sorting device comprises a first mechanical arm and an electromagnet, and the electromagnets are fixedly connected with the tail end of the first mechanical arm.
Preferably, the bottom surface of the crushing plate is further provided with a groove, the tail end of the conveying table is fixedly provided with a telescopic rod, and the groove can just accommodate the movable end of the telescopic rod.
Preferably, an upper end surface of the first conveyor belt is lower than an upper end surface of the conveying table.
Preferably, the rolling device comprises a rolling wheel, a tension wheel, a track and a second motor; the crawler belt is wound on the peripheries of the rolling wheel and the tensioning wheel and is meshed and connected with the rolling wheel and the tensioning wheel through gear teeth, and the periphery of the crawler belt is provided with the crushing bulge; the centers of the rolling wheel and the tensioning wheel are respectively and rotatably connected with a central shaft, and the central shaft is fixedly connected with the telescopic end of the hydraulic cylinder through a connecting rod; the second motor is fixedly arranged on the connecting rod, and the output end of the second motor is fixedly connected with the rolling wheel.
Preferably, the step 6 further comprises a compatilizer, the compatilizer is put into a forming machine together with the polypropylene, the polyethylene, the polyvinyl chloride plastic waste and the wood powder, and the compatilizer is any one of ethylene-vinyl acetate copolymer, ethylene-acrylate copolymer or maleic anhydride grafted polystyrene.
Preferably, the step 6 further comprises nano-montmorillonite, the nano-montmorillonite, polypropylene, polyethylene, polyvinyl chloride plastic waste, wood powder and the compatilizer are put into a forming machine together, and the content of the nano-montmorillonite is 5 wt% -10 wt%.
The invention at least comprises the following beneficial effects:
1. according to the environment-friendly treatment method of the construction waste, the light waste, plastic and wood mixed waste is firstly sorted out from the construction waste to obtain metal and concrete mixed waste; then the metal-containing garbage is sorted out, and the reinforcing steel bars in the reinforced concrete blocks in the metal-containing garbage are separated from the concrete by the reinforcing steel bar separating device, so that the waste reinforcing steel bars are recycled to the maximum extent. The concrete garbage is made into recycled aggregate for recycling, and the recycled plastic garbage and the wood garbage are made into wood mixed materials for recycling, so that the classified treatment and recycling of different construction wastes are realized.
2. According to the environment-friendly treatment method of the construction waste, the concrete wrapped outside the reinforcing steel bars is crushed and separated through the reinforcing steel bar separating device, the reinforcing steel bar separating device can vertically pressurize and crush and transversely roll and crush reinforced concrete blocks, the crushing efficiency is high, the reinforcing steel bars and the concrete can be thoroughly separated, and manual crushing is not needed.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
Fig. 1 is a schematic structural view of a reinforcing bar separating device according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of the crushing device according to the above embodiment of the invention;
FIG. 3 is a top view of FIG. 1;
FIG. 4 is a top view of the breaker plate of the above-described embodiment of the present invention;
fig. 5 is a schematic structural diagram of the conveying device in the above embodiment of the present invention.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
It is to be noted that the experimental methods described in the following embodiments are all conventional methods unless otherwise specified, and the reagents and materials, if not otherwise specified, are commercially available; in the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
The invention provides an environment-friendly treatment method of construction waste, which comprises the following steps:
step 1: sorting out light garbage in the construction garbage to obtain primary construction garbage;
step 2: sorting out plastic and wood mixed garbage in the primary building garbage to obtain metal and concrete mixed garbage;
and step 3: sorting out the metal-containing garbage in the metal and concrete mixed garbage to obtain concrete garbage; the metal-containing garbage is put into a steel bar separation device to break away the concrete on the waste steel bars and separate the waste steel bars;
and 4, step 4: sequentially feeding the concrete garbage obtained in the step 3 into a crusher and a screening machine to obtain recycled aggregate;
and 5: sorting the light garbage in the step 1 and the polypropylene, polyethylene and polyvinyl chloride plastic garbage and wood garbage in the plastic and wood mixed garbage in the step 2 respectively;
step 6: and (3) grinding the wood garbage sorted in the step (5) into wood powder, and then putting the wood powder and the plastic garbage of polypropylene, polyethylene and polyvinyl chloride sorted in the step (5) into a forming machine together to obtain the wood-plastic composite material.
In the technical scheme, firstly, light garbage such as paper and light plastics is required to be sorted out, then, wood and mixed garbage with heavier weight is sorted out, and the rest is the mixed garbage of metal and concrete. Then the metal-containing garbage can be sorted out by the magnetic metal sorting device. The metal-containing garbage in the construction garbage contains a lot of waste steel bars which can be recycled, the metal-containing garbage needs to be put into the steel bar separation device firstly, the concrete wrapped on the periphery of the steel bars is crushed by the steel bar separation device, the steel bars are separated out and recycled, and the metal garbage except the steel bars can be processed into metal materials with various specifications after being recycled. And the concrete fragments generated in the process can also be recycled aggregate obtained in the step 4 together with the concrete garbage obtained in the step 3, and can be continuously used for producing concrete and mortar with corresponding strength grades or preparing building material products such as building blocks, wall plates and floor tiles, and can also be used for road base layers, pile foundation fillers, foundation foundations and the like. The light garbage in the step 1, the polypropylene, polyethylene and polyvinyl chloride plastic garbage in the plastic and wood mixed garbage in the step 2 and the wood garbage can be used as raw materials for manufacturing the wood-plastic composite material, and the manufactured wood-plastic composite material can be manufactured into building and decoration materials such as doors and windows, floors and the like, logistics engineering materials such as trays, material boxes and the like. In the treatment method provided by the invention, the reinforced concrete garbage and other concrete garbage are not directly put into a large crusher commonly used by mining machinery such as a large jaw crusher, an impact crusher and the like together, so that the damage of reinforcing steel bars to crusher equipment is avoided, and the conventional crusher cannot realize the recycling of the reinforcing steel bars. The invention separates the reinforced concrete by the metal sorting device and separately separates and recovers the reinforcing steel bars, thereby ensuring that the reinforcing steel bars are not further damaged, simultaneously ensuring that the reinforcing steel bars do not enter the crusher any more and ensuring the working efficiency of the crusher.
In another embodiment, in the step 1, the light garbage in the construction garbage is sorted out by using a wind sorting device. The wind picking device can be a sorting device which is conventionally used in the prior art, namely, the wind picking device comprises a vibration feeder, and a fan and a light garbage recycling box which are respectively arranged on two sides of the vibration feeder. The construction waste moves from the feeding end of the vibration feeder to the discharging end along with the vibration feeder, and the light waste of paper and light plastics is blown to the light waste recycling bin at the other side under the action of the fan in the process, so that the light waste is sorted.
In another embodiment, the water sorting device is used for sorting the plastic and wood mixed garbage in the primary construction garbage in the step 2. Also, the water sorting device may be a water sorting device conventionally used in the prior art, and the density of the plastic-wood mixed garbage and the metal-concrete mixed garbage relative to water is different, so that the plastic-wood mixed garbage can float on the water surface, and the metal-concrete mixed garbage can sink into the water bottom, so that the plastic-wood mixed garbage can be sorted. Considering that some light-weight metal and concrete mixed garbage, such as electric wires, also float on the water surface in the process, part of the metal garbage can be sorted out by a small metal sorting device in the process between the step 2, wherein the small metal sorting device can be a small or handheld electromagnetic adsorption device. The metal and concrete mixed garbage obtained after being sorted by the water sorting device enters the next step through the conveying device, the moisture content is further reduced in the conveying process, and the dust generated in the subsequent crushing process of the metal and concrete mixed garbage with certain wettability is less.
In another embodiment, the water-picking device comprises a water tank filled with water and sterilizing liquid and a fishing device. According to the technical scheme, the disinfectant is added into the water tank, so that garbage which is harmful to human bodies, such as putrefactive garbage and the like mixed in the construction garbage can be disinfected in the water sorting process, and the health and safety of field workers are ensured as much as possible.
In another embodiment, as shown in fig. 1 to 3, the reinforcing bar separating apparatus includes:
a conveying table 1, both sides of which are respectively provided with a conveying device 11;
the hood 2 is of an inverted U-shaped structure, and the lower end face of the hood is fixedly connected with the conveying table 1;
a crushing device 3 provided in the hood 2, the crushing device 3 including a rolling device 34, a crushing plate 35, and a hydraulic cylinder 31; the bottom surface of the crushing plate 35 is in gear transmission with the conveying device 11, and crushing protrusions 36 are arranged on the upper surface of the crushing plate 35 and the periphery of the rolling device 34; the hydraulic cylinder 31 is fixedly arranged on the hood 2, and the telescopic end of the hydraulic cylinder is fixedly connected with the rolling device 34 so as to drive the rolling device 34 to vertically move up and down above the conveying table 1;
the metal sorting device comprises a first conveyor belt 4 connected with the tail end of the conveying table 1, wherein a plurality of first metal sorting devices 5 are arranged on one side of the first conveyor belt 4, each first metal sorting device 5 comprises a first mechanical arm 51 and an electromagnet 52, and the electromagnet 52 is fixedly connected with the tail end of the first mechanical arm 51.
In the technical scheme, the metal-containing garbage enters from one end of the conveying device 11, is placed on the crushing plate 35, enters the hood 2 together with the crushing plate 35 under the driving of the conveying device 11, then the hydraulic oil cylinder 31 drives the rolling device to move downwards to pressurize and crush the metal-containing garbage on the crushing plate 35, and the crushing protrusions 36 are arranged on the upper surface of the crushing plate 35 and the periphery of the rolling device 34 to increase crushing strength. After the crushing is completed, the conveying device 11 drives the crushing plate 35 and the crushed metal-containing garbage to move out of the hood and enter the first conveyor belt 4, and in the process of moving along with the first conveyor belt 4, the mechanical arm 51 drives the electromagnet 52 to sort the metal-containing garbage on the electromagnet, so as to sort out the metal garbage, and the rest of the metal garbage is conveyed to the concrete garbage through the conveying device. The first conveyor belt 4 may be a conventionally used belt conveyor belt.
As shown in fig. 5, the conveying device 11 includes a driving wheel 1114, a driven wheel 112, a transmission belt 113 and a first motor 111, the driving wheel 114 and the driven wheel 113 are respectively connected to the conveying table 1 in a rotating manner, an output shaft of the first motor 111 is fixedly connected to the driving wheel 114, the transmission belt 113 is wound around the driving wheel 114 and the driven wheel 112, and the transmission belt 113 is provided with gear teeth on the outer periphery thereof. And a rack meshed with the gear teeth is arranged on the bottom surface of the crushing plate 35.
In another embodiment, as shown in fig. 4, the bottom surface of the crushing plate 35 is further provided with a groove 352, the end of the conveying table 1 is fixedly provided with a telescopic rod 6, and the groove 352 can just receive the movable end of the telescopic rod 6.
In this technical solution, the telescopic rod 6 may be a pneumatic, electric or hydraulic telescopic structure, such as a cylinder, a hydraulic cylinder or an electric telescopic rod. When the crushing plate 35 moves out of the hood 2 and reaches the end of the conveying table, the telescopic rod 6 is pneumatically driven to lift the crushing plate upwards, the telescopic end of the telescopic rod 6 abuts against the groove 352 to lift one end of the crushing plate 35, so that the crushing plate 35 is an inclined plane, and the crushed metal-containing garbage on the crushing plate 35 can slide onto the first conveying belt 4.
In another embodiment, the upper end surface of the first conveyor belt 4 is lower than the upper end surface of the conveying table 1. With this solution, the metallic waste on the crushing plate 35 can be more smoothly dropped onto the first conveyor belt 4.
In another embodiment, as shown in fig. 2, the rolling device 34 includes a rolling wheel 343, a tension wheel 341, a track 342, and a second motor 344; the crawler 342 is wound around the peripheries of the rolling wheel 343 and the tensioning wheel 341, and is meshed with the rolling wheel 343 and the tensioning wheel 341 through gear teeth, and the crushing protrusions 36 are arranged on the periphery of the crawler 342; the centers of the rolling wheel 343 and the tension wheel 341 are respectively and rotatably connected with a central shaft 33, and the central shaft 33 is fixedly connected with the telescopic end of the hydraulic cylinder 31 through a connecting rod 32; the second motor 344 is fixedly disposed on the connecting rod 32, and an output end thereof is fixedly connected to the rolling wheel 343.
In this technical solution, after the rolling device 34 moves downward to the lowest position under the driving of the hydraulic cylinder 31, the hydraulic cylinder 31 remains stationary, that is, the rolling device 34 is maintained at the current height. At this time, the second motor 344 is started to rotate the rolling wheel 343, the crawler 342 starts to rotate around the rolling wheel 343 and the tensioning wheel 341, and the crushing protrusions 36 are provided on the outer circumference of the crawler 342, so that the metal-containing garbage on the crushing plate 35 is further crushed by rolling. Through pressurization crushing in the vertical direction and rolling crushing in the horizontal direction, two-stage crushing is carried out on concrete wrapped outside the reinforcing steel bars, so that the reinforcing steel bars and the concrete can be thoroughly separated, and manual crushing is not needed through manpower.
In another embodiment, step 6 further comprises a compatilizer, the compatilizer is put into a forming machine together with the polypropylene, polyethylene and polyvinyl chloride plastic waste and wood flour, and the compatilizer is any one of ethylene-vinyl acetate copolymer, ethylene-acrylate copolymer or maleic anhydride grafted polystyrene.
In the technical scheme, a plurality of plastic wastes are mixed for treatment, so that the performance of a single polymer can be improved, the sorting cost is reduced, but most polymers are generally incompatible with each other, and therefore, a compatilizer is required to be added for treatment, so that the compatibility of the wood-plastic product is improved, and the mechanical property of the wood-plastic product is improved.
In another embodiment, the step 6 further comprises nano-montmorillonite, the nano-montmorillonite, polypropylene, polyethylene, polyvinyl chloride plastic waste, wood powder and the compatilizer are put into a forming machine together, and the content of the nano-montmorillonite is 5 wt% -10 wt%. The appropriate amount of the nano montmorillonite can increase the bending strength and the bending modulus of the wood-plastic composite material.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (10)
1. An environment-friendly treatment method of construction waste is characterized by comprising the following steps:
step 1: sorting out light garbage in the construction garbage to obtain primary construction garbage;
step 2: sorting out plastic and wood mixed garbage in the primary building garbage to obtain metal and concrete mixed garbage;
and step 3: sorting out the metal-containing garbage in the metal and concrete mixed garbage to obtain concrete garbage; the metal-containing garbage is put into a steel bar separation device to break away the concrete on the waste steel bars and separate the waste steel bars;
and 4, step 4: sequentially feeding the concrete garbage obtained in the step 3 into a crusher and a screening machine to obtain recycled aggregate;
and 5: sorting the light garbage in the step 1 and the polypropylene, polyethylene and polyvinyl chloride plastic garbage and wood garbage in the plastic and wood mixed garbage in the step 2 respectively;
step 6: and (3) grinding the wood garbage sorted in the step (5) into wood powder, and then putting the wood powder and the plastic garbage of polypropylene, polyethylene and polyvinyl chloride sorted in the step (5) into a forming machine together to obtain the wood-plastic composite material.
2. The method for environmentally friendly disposal of construction waste as claimed in claim 1, wherein the light waste in the construction waste is sorted out by using a wind sorting device in step 1.
3. The method for environmentally friendly treating construction waste as claimed in claim 1, wherein the step 2 is to sort the mixed waste of plastics and wood in the primary construction waste by using a water sorting device.
4. The method of claim 3, wherein the water-sorting device comprises a water tank filled with water and disinfectant and a fishing device.
5. The environmentally friendly disposal method of construction waste according to claim 1, wherein the reinforcing bar separating means comprises:
the conveying device is arranged on each of two sides of the conveying table;
the hood is of an inverted U-shaped structure, and the lower end face of the hood is fixedly connected with the conveying table;
the crushing device is arranged in the hood and comprises a rolling device, a crushing plate and a hydraulic cylinder; the bottom surface of the crushing plate is in gear transmission with the conveying device, and crushing bulges are arranged on the upper surface of the crushing plate and the periphery of the rolling device; the hydraulic cylinder is fixedly arranged on the machine cover, and the telescopic end of the hydraulic cylinder is fixedly connected with the rolling device so as to drive the rolling device to vertically move up and down above the conveying table;
the metal sorting device comprises a first conveyor belt and a second conveyor belt, wherein the first conveyor belt is connected with the tail end of the conveying table, one side of the first conveyor belt is provided with a plurality of first metal sorting devices, each first metal sorting device comprises a first mechanical arm and an electromagnet, and the electromagnets are fixedly connected with the tail end of the first mechanical arm.
6. The environmental protection method for disposing construction waste, according to claim 5, wherein the bottom surface of the crushing plate is further provided with a groove, the end of the conveying platform is fixedly provided with a telescopic rod, and the groove can just receive the movable end of the telescopic rod.
7. The method for environmentally treating construction waste according to claim 6, wherein an upper end surface of the first conveyor belt is lower than an upper end surface of the conveyor table.
8. The environment-friendly treatment method for construction waste as claimed in claim 5, wherein the rolling device comprises a rolling wheel, a tension wheel, a track and a second motor; the crawler belt is wound on the peripheries of the rolling wheel and the tensioning wheel and is meshed and connected with the rolling wheel and the tensioning wheel through gear teeth, and the periphery of the crawler belt is provided with the crushing bulge; the centers of the rolling wheel and the tensioning wheel are respectively and rotatably connected with a central shaft, and the central shaft is fixedly connected with the telescopic end of the hydraulic cylinder through a connecting rod; the second motor is fixedly arranged on the connecting rod, and the output end of the second motor is fixedly connected with the rolling wheel.
9. The method for environmentally friendly disposal of construction waste as claimed in claim 1, further comprising a compatibilizer in step 6, the compatibilizer being any one of ethylene-vinyl acetate copolymer, ethylene-acrylic ester copolymer or maleic anhydride grafted polystyrene, and the plastic waste of polypropylene, polyethylene and polyvinyl chloride and wood powder being put into a molding machine.
10. The method for environmentally friendly disposal of construction waste as claimed in claim 9, further comprising nano-montmorillonite in step 6, wherein the nano-montmorillonite is put into a forming machine together with the polypropylene, polyethylene and polyvinyl chloride plastic waste, wood flour and the compatilizer, and the content of the nano-montmorillonite is 5 wt% to 10 wt%.
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