A recycling process for construction waste recycling

Abstract

The application discloses a recycling process for recycling construction waste, and belongs to the field of construction waste.The device comprises the following steps: one, primary crushing, construction waste is sent into a crusher for crushing; two, magnetic separation, the construction waste after primary crushing is subjected to magnetic separation by a magnetic separator to remove metal impurities in the construction waste; and three, vibration screening, the construction waste after the magnetic separation is sent to a conveying net in a conveying and screening machine for conveying, and then the construction waste is screened into 2D objects, 3D objects and undersize objects by cooperation of multiple cams, air blowing barrels and the conveying net.The primary crushing and the magnetic separation are directly used to separate the material into 2D objects, 3D objects and undersize objects by the conveying and screening machine, so that classification and recycling of the construction waste are completed, the convenience and rapidity of recycling and processing are improved, and the cost and time of multi-device and multi-process processing are reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of construction waste, and particularly relates to a recycling process for recycling construction waste. BACKGROUND

[0002] Construction waste refers to waste soil, discarded materials and other waste generated in the process of new construction, reconstruction, decoration and demolition of various buildings, and mainly includes construction waste, waste bricks, waste concrete, steel, wood and plastic materials.

[0003] With the acceleration of industrialization and urbanization, the construction industry has developed rapidly, and a large amount of construction waste has been generated. If the construction waste is merely landfilled, a large amount of landfill sites are needed, soil resources are wasted, and the soil and groundwater quality are greatly polluted.

[0004] However, the construction waste contains a large amount of components that cannot be used as recycled aggregates, such as soil, wood, metal and plastic, when it is crushed. Meanwhile, due to the difference in density of the components in the construction waste, such as concrete, bricks, sand and waste soil, it is difficult to prepare recycled aggregates that meet the above standards, and high value-added utilization cannot be achieved. In the prior art, a large number of equipment are needed to classify and recycle the construction waste, which greatly increases the use cost and processing time of recycling. SUMMARY

[0005] In order to overcome the above technical problems, the purpose of the present application is to provide a recycling process for recycling construction waste, so as to solve the problem that in the prior art, a large number of equipment are needed to classify and recycle the construction waste, which greatly increases the use cost and processing time of recycling.

[0006] The purpose of the present application can be achieved by the following technical solutions:

[0007] A recycling process for recycling construction waste, comprising the following steps: 1. primary crushing, the construction waste is sent into a crusher for crushing; 2. magnetic separation, the construction waste after primary crushing is separated from metal impurities in a magnetic separator; 3. vibration screening, the construction waste after magnetic separation is sent to a conveying net in a conveying and screening machine, and then the construction waste is screened into 2D objects, 3D objects and undersize materials by cooperation of a plurality of cams and blow tubes with the conveying net.

[0008] As a further scheme of the present application, the particle size of the construction waste in step 1 is less than 60 mm.

[0009] As a further scheme of the present application, the crusher in step 1 is a jaw crusher.

[0010] As a further scheme of the present application: the 2D objects in the vibrating screening in step three are subsequently subjected to a compression and packaging step.

[0011] As a further scheme of the present application: the 3D objects in the vibrating screening in step three are subsequently subjected to a conveying and sorting step, and the sorted objects are subjected to a packaging step and a secondary crushing step, and the undersize and the secondary crushed objects are subjected to a secondary screening and classification.

[0012] As a further scheme of the present application: the aperture of the conveying net in step three is less than 30 mm.

[0013] As a further scheme of the present application: the conveying and screening machine in step three comprises a conveying net, a plurality of cam groups are rotatably connected to the bottom of the conveying net, and a plurality of air blowing tubes are arranged on the bottom of the conveying net.

[0014] As a further scheme of the present application: the conveying and screening machine in step three further comprises a material guiding plate, a conveying plate and a material receiving plate, which are used for separately conveying the 2D objects, 3D objects and undersize, respectively.

[0015] As a further scheme of the present application: the top of the fixed frame is fixedly connected with a filter box, the inside of the fixed frame is fixedly connected with an air suction cover, the filter box is in communication with the air suction cover, the top of the fixed frame is fixedly connected with a suction pump, and the air inlet end of the suction pump is in communication with the filter box.

[0016] The present application has the following advantages:

[0017] 1. In the present application, the conveying and screening machine is used to sort the objects into 2D objects, 3D objects and undersize after primary crushing and magnetic separation, thereby achieving classification and recycling of construction waste, improving the convenience and speed of recycling and processing, and reducing the cost and time of multi-device and multi-process processing.

[0018] 2. In the present application, the conveying net is used to convey and screen the objects, a plurality of cam groups are used to stagger and lift the conveying net, thereby screening out the undersize from the objects, and the air blowing tubes are used to blow the objects on the conveying net, thereby blowing out the 2D objects from the objects, and then only the 3D objects are left on the conveying net for conveying, thereby achieving rapid classification and screening of construction waste, reducing the process of construction waste treatment, and improving the efficiency of treatment. BRIEF DESCRIPTION OF DRAWINGS

[0019] The invention will now be further described with reference to the accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the process structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the conveying and screening machine structure in this invention;

[0022] Figure 3 This is the present invention. Figure 2 Enlarged structural diagram of section A;

[0023] Figure 4 This is a schematic diagram of the overall structure of the slide bar in this invention.

[0024] In the diagram: 1. Conveying and screening machine; 101. Fixed frame; 2. Conveyor mesh; 3. Cam; 4. Blower; 401. Baffle; 5. Hollowed-out belt; 501. Pulley roller; 6. Filter box; 601. Suction pump; 602. Suction hood; 7. Guide plate; 8. Conveying plate; 9. Receiving plate; 10. Fixed plate; 11. Mounting plate; 12. Slide bar; 13. Striking ball; 14. Tension spring. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] like Figures 1-4 As shown, a recycling process for construction waste includes the following steps: 1. Primary crushing: The construction waste is fed into a jaw crusher for crushing, and the particle size of the primary crushed construction waste is less than 60mm; 2. Magnetic separation: The primary crushed construction waste is passed through a magnetic separator to remove metal impurities from the construction waste; 3. Vibrating screening: The magnetically separated construction waste is fed onto a conveyor screen 2 in a conveyor screen 1 for conveying. The aperture of the conveyor screen 2 is less than 30mm. Then, through the cooperation of multiple sets of cams 3 and blowers 4 with the conveyor screen 2, the construction waste is screened into 2D materials, 3D materials and undersize materials. The 2D materials include woven bags, plastics, foam and clothing, etc. The 3D materials include bricks, stones, wood, PVT pipes, etc. The undersize materials refer to gravel containing soil, broken plastics and other debris, etc.

[0027] The 2D material after the above-mentioned vibratory screening process is then compressed and packaged.

[0028] The 3D objects in the vibration screening step in step three are subsequently subjected to a conveying and sorting step, that is, the wood and PVT pipes in the 3D objects are sorted by manual sorting, and then only the bricks and stones are left. After sorting, the wood and PVT pipes are packaged for recycling, and the remaining stones and bricks are subjected to secondary crushing into smaller slag. The crushed slag and undersize are subjected to secondary screening and classification. The ash material with a size of 0-30 mm can be directly recycled as recycled bricks, and the stones with a size of 30-60 mm can be directly sold as recycled aggregates.

[0029] As shown in Figure 2 and Figure 3 , the conveying and screening machine 1 in step three of the above includes a conveying net 2, a plurality of cams 3 rotatably connected to the bottom of the conveying net 2, and a plurality of blow tubes 4 arranged on the bottom of the conveying net 2. A cover 401 is arranged on the upper side of the blow tube 4 to prevent the undersize from falling into the blow tube 4. The conveying and screening machine 1 is fixedly connected with a fixed frame 101 at the top. The fixed frame 101 is rotatably connected with a hollow belt 5 inside for blocking the conveying of 2D objects. A poking roller 501 is rotatably connected inside the fixed frame 101 to poke out the 2D objects remaining on the outer wall of the hollow belt 5, so as to avoid the 2D objects from blocking on the hollow belt 5. The conveying and screening machine 1 in step three further includes a guide plate 7, a conveying plate 8 and a receiving plate 9 for separately conveying the 2D objects, 3D objects and undersize. The fixed frame 101 is fixedly connected with a fixed plate 10 inside. The fixed plate 10 is located on the upper side of the bottom of the conveying net 2. A plurality of protrusions are fixedly connected to the bottom of the fixed plate 10. When the cams 3 lift the conveying net 2, the conveying net 2 at the bottom will be in a tight state due to the upward movement of the top of the conveying net 2, like a chain being pulled tight. When the conveying net 2 is tightened, it will abut against the protrusions at the bottom of the fixed plate 10. The protrusions can push out the blocked materials on the conveying net 2 for cleaning, thereby improving the efficiency of the screening process of the conveying net 2 and avoiding mixing of the materials during classification by the conveying net 2. The fixed frame 101 is fixedly connected with a filter box 6 at the top. The fixed frame 101 is fixedly connected with an air suction cover 602 inside. The filter box 6 is in communication with the air suction cover 602. The fixed frame 101 is fixedly connected with a suction pump 601 at the top. The suction pump 601 is in communication with the filter box 6 at the intake end. The filter box 6 sucks air inside through the suction pump 601. The filter box 6 generates a negative pressure suction force at the air suction cover 602, thereby sucking the dust in the 2D objects blown out by the blow tube 4, reducing the dust content in the 2D objects and improving the quality of recycling.

[0030] Further, the conveying and screening machine 1 is fixedly connected with a mounting plate 11, two groups of slide rods 12 are slidably connected to the mounting plate 11, the bottom of the two groups of slide rods 12 is fixedly connected with the top of the fixed plate 10, and the top of the slide rod 12 is fixedly connected with a knocking ball 13, the knocking ball 13 is located at the back of the receiving plate 9, the outer wall of the slide rod 12 is sleeved with a tension spring 14, the two ends of the tension spring 14 are respectively abutted with the knocking ball 13 and the mounting plate 11, when the conveying net 2 is abutted with the protrusion at the bottom of the fixed plate 10, the protrusion at the bottom of the fixed plate 10 pushes out the blocked material on the conveying net 2, at the same time, the fixed plate 10 is pushed by the conveying net 2, so that the slide rod 12 drives the knocking ball 13 to knock the back of the receiving plate 9, so that the receiving plate 9 is vibrated, so that the material attached to the receiving plate 9 is shaken out, the material attached to the receiving plate 9 is avoided, and the convenience of cleaning is improved.

[0031] The working principle of the present application is as follows: the collected construction waste is crushed by the jaw crusher, the particle size of the crushed material is less than 60mm, then the crushed material is conveyed to the conveying net 2 in the conveying and screening machine 1 by the conveying belt, the material is conveyed by the conveying net 2, and a plurality of cams 3 are synchronously rotated, the conveying net 2 is lifted from the bottom of the conveying net 2, so that the conveying net 2 is fluctuated up and down, so that the undersize material in the material is screened out from the mesh hole of the conveying net 2 and falls down, then the receiving plate 9 is used to receive and convey, at the same time, the 3D material in the material is continuously conveyed by the conveying net 2, then a plurality of blow tubes 4 are started, the 2D material in the material is blown out of the conveying net 2 by the blow tubes 4, and then floats upward, and then adheres to the surface of the hollow belt 5, and then the 2D material is conveyed to the upper side of the guide plate 7 by the hollow belt 5, the air flow blown out by the blow tube 4 is blocked by the guide plate 7, so that the 2D material adhered to the surface of the hollow belt 5 cannot be blown by the air flow, then the 2D material falls into the guide plate 7 and is guided and classified, then only the 3D material is conveyed on the conveying net 2, and then falls into the conveying plate 8 and is conveyed, so that the construction waste is classified.

[0032] The above describes one embodiment of the present application in detail, but the content described is only the preferred embodiment of the present application, and cannot be considered as limiting the scope of the present application. Any equivalent changes and improvements made within the scope of the present application should still belong to the patent coverage range of the present application.

Claims

1. A recycling process for construction waste, characterized in that, Includes the following steps:

1. Primary crushing: The construction waste is fed into the crusher for crushing. Second: Magnetic separation, which removes metal impurities from the construction waste after primary crushing by passing it through a magnetic separator; Three: Vibrating screening, the construction waste after magnetic separation is sent to the conveyor net (2) in the conveyor screening machine (1) for conveying, and then the construction waste is screened into 2D material, 3D material and undersize material by the cooperation of multiple sets of cams (3) and blower (4) with the conveyor net (2); The conveying screening machine (1) in step three includes a conveyor net (2), multiple sets of cams (3) are rotatably connected to the bottom of the conveyor net (2), multiple sets of blowers (4) are set at the bottom of the conveyor net (2), and a fixed frame (101) is fixedly connected to the top of the conveying screening machine (1). A hollow belt (5) is rotatably connected inside the fixed frame (101) for blocking and conveying 2D objects. The conveying screening machine (1) in step three also includes a guide plate (7), a conveying plate (8) and a receiving plate (9). The guide plate (7), the conveying plate (8) and the receiving plate (9) are used to separately convey 2D materials, 3D materials and undersize materials, respectively. The conveying screening machine (1) is fixedly connected to a fixing plate (10). The fixing plate (10) is located on the upper side of the lower belt surface of the conveyor network (2), and multiple sets of protrusions are fixedly connected to the bottom of the fixing plate (10). The conveyor screening machine (1) has an internal fixed connection to an installation plate (11). Two sets of sliding rods (12) are slidably connected on the installation plate (11). The bottom of the two sets of sliding rods (12) is fixedly connected to the top of the fixed plate (10). At the same time, a striking ball (13) is fixedly connected to the top of the sliding rod (12). The striking ball (13) is located on the back of the receiving plate (9). A tension spring (14) is sleeved on the outer wall of the sliding rod (12). The two ends of the tension spring (14) abut against the striking ball (13) and the installation plate (11) respectively. When the cam (3) lifts the conveyor (2), the conveyor (2) at the bottom will be taut due to the upward movement of the top of the conveyor (2). When the conveyor (2) is taut, it will abut against the protrusion at the bottom of the fixed plate (10). As the conveyor (2) is taut and abuts against the protrusion at the bottom of the fixed plate (10), the protrusion at the bottom of the fixed plate (10) pushes out the material blocking the conveyor (2). The fixed plate (10) is pushed by the conveyor (2), and thus drives the striking ball (13) to strike the back of the material plate (9) through the slide rod (12).

2. The recycling process for construction waste according to claim 1, characterized in that, The particle size of the construction waste in the primary crushing step is less than 60mm.

3. The recycling process for construction waste according to claim 1, characterized in that, The crusher in step one is a jaw crusher.

4. The recycling process for construction waste according to claim 1, characterized in that, The 2D material from the vibrating screen in step three is subsequently compressed and packaged.

5. The recycling process for construction waste according to claim 1, characterized in that, In step three, the 3D material from the vibrating screen is then conveyed and sorted. The sorted material is then packaged and subjected to a secondary crushing process. The undersize material and the material after secondary crushing are then subjected to a second screening and classification.

6. The recycling process for construction waste according to claim 1, characterized in that, The aperture of the transmission net (2) in step three is less than 30 mm.

7. The recycling process for construction waste according to claim 1, characterized in that, A filter box (6) is fixedly connected to the top of the fixed frame (101), and an air suction hood (602) is fixedly connected inside the fixed frame (101). The filter box (6) is connected to the air suction hood (602), and a suction pump (601) is fixedly connected to the top of the fixed frame (101). The air inlet of the suction pump (601) is connected to the filter box (6).

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