A building demolition waste site modular recycled aggregate production system

Abstract

The application relates to the technical field of resource utilization of construction waste, and discloses a building demolition waste on-site modularized recycled aggregate preparation system, which comprises a multistage crushing box, the lower surface of the multistage crushing box is fixedly provided with a magnetic separation box, a plurality of magnetic adsorption rollers are arranged in the magnetic separation box, the lower surface of the magnetic separation box is fixedly provided with a cleaning box, a rotary screening cylinder is rotatably connected to the inside of the cleaning box, a water pump is arranged on the outer wall of the cleaning box, a filter box is fixedly arranged at the end, away from the cleaning box, of the water pump, a plurality of gratings are arranged in the filter box, a water pump is arranged on the outer wall of the filter box, and a cylinder is fixedly arranged at the end, away from the filter box, of the water pump. Through magnetic separation, multistage screening and soaking in a barium salt-hydroxyl phosphate lime mixed strengthening solution, the recovery rate of the recycled aggregate in the construction waste can be improved, and the quality and the compressive strength of the recycled aggregate can be improved.

Description

Technical Field

[0001] This invention relates to the field of construction waste resource utilization technology, specifically to a modular on-site recycled aggregate preparation system for construction demolition waste. Background Technology

[0002] Construction waste refers to various types of waste generated during the construction, renovation, expansion, and demolition of buildings and structures. It also includes solid waste stripped or left over from the construction of municipal infrastructure and road repair projects. Its composition is complex and diverse, mainly covering different types of materials such as slag, gravel, waste mortar, concrete fragments, waste bricks and tiles, scrap steel, wood, and plastics. If this type of waste is dumped indiscriminately, it will occupy a large amount of land resources and pollute soil and water sources. However, through standardized treatment methods such as classification, sorting, crushing and screening, and cleaning and purification, the useful components such as recycled aggregates and metals can be recycled and reused. This can reduce dependence on the exploitation of natural resources and reduce construction costs, which is in line with the development concepts of green environmental protection and circular economy.

[0003] Currently, recycled aggregates from construction waste have high impurity content and low strength, making them suitable only for backfilling and unsuitable for use as building aggregates. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a modular on-site recycled aggregate preparation system for construction demolition waste. This system solves the problem that recycled aggregates from existing construction waste processing and recycling processes have high impurity content and low strength, making them suitable only for backfilling and unusable as building aggregates.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a modular on-site recycled aggregate preparation system for construction demolition waste, comprising a multi-stage crushing box, a magnetic separator fixedly mounted on the lower surface of the multi-stage crushing box, multiple magnetic adsorption rollers installed inside the magnetic separator, a washing box fixedly mounted on the lower surface of the magnetic separator, a rotating screening cylinder rotatably connected inside the washing box, a water pump mounted on the outer wall of the washing box, a filter box fixedly mounted at the end of the water pump away from the washing box, multiple grids installed inside the filter box, a water pump mounted on the outer wall of the filter box, and a cylinder fixedly mounted at the end of the water pump away from the filter box.

[0006] The above technical solution involves sequentially performing magnetic separation, multi-stage screening, and immersion in a strengthening liquid on construction waste. This achieves the goal of increasing the recycling rate of recycled aggregates, improving their quality and compressive strength, and ensuring their proper use in the future.

[0007] As a further description of the above technical solution: An electric push rod is fixedly installed at the top of the cylinder, and a sliding disk is fixedly installed at the drive end of the electric push rod. The outer wall of the sliding disk is slidably connected to the inside of the cylinder, and a pressure regulating component is installed on the upper surface of the sliding disk.

[0008] The above technical solution involves using an electric push rod to drive a sliding disc to slide inside the cylinder, thereby pressurizing and filtering the injected wastewater and increasing the filtration rate of the wastewater.

[0009] As a further description of the above technical solution: The voltage regulating component includes a fixed rod, a magnetic block one is fixedly connected to the top of the fixed rod, a fixed column is slidably connected to the outer wall of the magnetic block one, an elastic element is fixedly installed inside the fixed column, a sliding block is fixedly installed at the end of the elastic element near the magnetic block one, and a magnetic block two is fixedly installed on the lower surface of the sliding block, and the magnetic blocks two and magnetic blocks one are magnetically repelled on opposite sides.

[0010] The above technical solution achieves the effect of ensuring the normal and stable operation of the sliding disc pressurization process by automatically adjusting the pressure in the space above the sliding disc using a pressure regulating component.

[0011] As a further description of the above technical solution: Both the fixed column and the sliding block have multiple holes inside, and the holes are located above the cylinder.

[0012] The above technical solution allows outside air to enter the cylinder, thereby automatically balancing the air pressure inside the cylinder.

[0013] As a further description of the above technical solution: The bottom end of the fixing rod is fixedly connected to the upper surface of the sliding disc, the outer wall of the fixing column is fixedly connected to the inside of the cylinder, and the outer wall of the sliding block is slidably connected to the inside of the fixing column.

[0014] The above technical solution involves using a sliding disc to drive a fixed rod to slide, thereby bringing the holes inside the fixed block and the sliding block to the same horizontal level.

[0015] As a further description of the above technical solution: A magnetic coupler is installed at the bottom of the cylinder. The drive end of the magnetic coupler is magnetically connected to a disk. A quartz sand filter plate is fixedly connected to the outer wall of the disk. A cleaning plate is attached to the upper surface of the quartz sand filter plate. The outer wall of the cleaning plate is fixedly connected to the inside of the cylinder.

[0016] The above technical solution involves using a quartz sand filter plate to filter fine particulate impurities in wastewater, and a cleaning plate to automatically clean the quartz sand filter plate in real time.

[0017] As a further description of the above technical solution: An adjustment assembly is installed on the outer wall of the disk. The adjustment assembly includes a threaded block. An activated carbon filter plate is fixedly connected to the outer wall of the threaded block, and the activated carbon filter plate is located directly below the quartz sand filter plate. The outer wall of the activated carbon filter plate is slidably connected to the inside of the cylinder.

[0018] The above technical solution involves adjusting the components to move the activated carbon filter plate up and down, thereby agitating the wastewater while accelerating the filtration and purification of the water.

[0019] As a further description of the above technical solution: The adjustment assembly also includes a reciprocating lead screw, which is installed on the outer wall of the disk. The outer wall of the reciprocating lead screw is threadedly connected to the inside of the threaded block. A fixed frame is rotatably connected to the outer wall of the reciprocating lead screw. The outer wall of the fixed frame is fixedly connected to the inside of the cylinder. The inside of the activated carbon filter plate is slidably connected to the outer wall of the fixed frame.

[0020] Through the above technical solution: the reciprocating screw rotates to drive the threaded block on its outer wall to move up and down reciprocally, further enabling the activated carbon filter plate to slide up and down reciprocally on the outer wall of the fixed frame.

[0021] As a further description of the above technical solution: The cleaning tank is filled with a barium salt-hydroxyphosphorus lime mixed reinforcement solution.

[0022] The above technical solution involves soaking the recycled aggregate in a barium salt-hydroxyphosphorus lime mixed strengthening solution, thereby improving the strength of the recycled aggregate.

[0023] As a further description of the above technical solution: The rotating screening cylinder has multiple screening holes inside, and the diameter of the screening holes is 5-20mm.

[0024] The above technical solution achieves fine filtration of construction waste through the rotation of the rotary screening cylinder.

[0025] Working Principle: The system operates via an external main control device, coordinating the operation of a multi-stage crushing box, magnetic separator, washing box, and water pump. Construction waste is first fed into the multi-stage crushing box, where it is thoroughly crushed by a primary jaw crusher and a secondary impact crusher. The waste then falls into the magnetic separator, where magnetic adsorption rollers remove steel bars, structural steel, and other metallic materials. After magnetic separation, the waste enters a rotary screen in the washing box, where centrifugal screening is achieved through the rotation of the screen. Finally, it undergoes a barium salt-hydroxyl group separation process. The phosphate lime mixed strengthening solution is used to soak the screened material for 10-15 minutes to improve its density. In the later stage of wastewater treatment, the water pump transports the wastewater in the cleaning tank to the filter tank. The larger solid particles are initially filtered through the removable and washable grid in the tank. Then, the water pump sends the wastewater into the cylinder for secondary fine filtration and purification. By carrying out magnetic separation, multi-stage screening and strengthening solution soaking in the strengthening solution in sequence, the recycling rate of recycled aggregate can be improved, as well as the quality and compressive strength of recycled aggregate can be improved.

[0026] This invention provides a modular on-site recycled aggregate preparation system for construction demolition waste. It has the following beneficial effects: 1. This invention achieves the effect of improving the recycling rate of recycled aggregates in construction waste, as well as improving the quality and compressive strength of recycled aggregates, through magnetic separation and multi-stage screening of construction waste and soaking in a barium salt-hydroxyphosphorus lime mixed strengthening solution.

[0027] 2. This invention uses a sliding disc to pressurize and filter wastewater injected into the cylinder by sliding downwards. This increases the filtration rate and also automatically balances the pressure above the sliding disc by sliding the sliding block inside the fixed column, ensuring that the pressurization filtration operation can be carried out normally and stably.

[0028] 3. This invention reduces the risk of impurities in wastewater clogging the filter pores of the quartz sand filter plate by rotating the quartz sand filter plate and moving the activated carbon filter plate up and down, while also improving the wastewater treatment rate. Attached Figure Description

[0029] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a partial structural diagram of the multi-stage crushing box of the present invention; Figure 3 This is a partial structural diagram of the magnetic adsorption roller of the present invention; Figure 4 This is a partial structural diagram of the sliding disk of the present invention; Figure 5 This is a partial structural diagram of the fixing column of the present invention; Figure 6This is a partial structural diagram of the cleaning plate of the present invention; Figure 7 This is a partial structural diagram of the fixing frame of the present invention.

[0030] The components include: 1. Multi-stage crushing box; 2. Magnetic separator; 3. Magnetic adsorption roller; 4. Washing box; 5. Rotary screening cylinder; 6. Water pump; 7. Filter box; 8. Grating; 9. Holes; 10. Cylinder body; 11. Electric push rod; 12. Sliding disc; 13. Pressure regulating component; 131. Fixed rod; 132. Magnetic block one; 133. Magnetic block two; 134. Sliding block; 135. Elastic element; 14. Fixed column; 15. Magnetic coupler; 16. Magnetic disk; 17. Quartz sand filter plate; 18. Cleaning plate; 19. Adjustment component; 191. Reciprocating screw; 192. Threaded block; 193. Fixed frame; 20. Activated carbon filter plate. Detailed Implementation

[0031] The technical solution of the present invention will now be clearly and completely described 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.

[0032] Please see the appendix Figure 1 -Appendix Figure 3 This invention provides a modular on-site recycled aggregate preparation system for construction demolition waste, including a multi-stage crushing box 1. A magnetic separator 2 is fixedly installed on the lower surface of the multi-stage crushing box 1. Multiple magnetic adsorption rollers 3 are installed inside the magnetic separator 2. A washing box 4 is fixedly installed on the lower surface of the magnetic separator 2. A rotary screening cylinder 5 is rotatably connected inside the washing box 4. A water pump 6 is installed on the outer wall of the washing box 4. A filter box 7 is fixedly installed at the end of the water pump 6 away from the washing box 4. Multiple grids 8 are installed inside the filter box 7. A cylinder 10 is fixedly installed at the end of the water pump 6 away from the filter box 7.

[0033] Specifically, the multi-stage crushing box 1, magnetic separator 2, washing box 4, and water pump 6 are controlled by an external main control device. Construction waste is then poured into the multi-stage crushing box 1, where a primary jaw crusher and a secondary impact crusher thoroughly crush the waste. The crushed waste falls into the magnetic separator 2, where multiple magnetic adsorption rollers 3 adsorb and sort materials such as reinforcing bars and structural steel. The magnetic intensity of the magnetic adsorption rollers 3 is adjustable between 0.3 and 0.8T. The sorted waste then falls into the rotary screening drum 5 within the washing box 4. The rotation of the rotary screening drum 5 centrifugally screens the construction waste. The screened construction waste is soaked in a barium salt-hydroxyphosphorus lime mixed strengthening solution for 10-15 minutes to improve its density. During the subsequent wastewater treatment, the wastewater in the cleaning tank 4 is pumped to the filter tank 7 by the water pump 6. At this time, the larger solid particles in the wastewater are initially filtered by the multiple grids 8 installed in the filter tank 7. The grids 8 are removable and washable. The wastewater in the filter tank 7 is then pumped to the cylinder 10 by the water pump 6 for secondary fine filtration and purification. Through magnetic separation, multi-stage screening, and soaking in the barium salt-hydroxyphosphorus lime mixed strengthening solution, the recycling rate of recycled aggregate in the construction waste is improved, while the quality and compressive strength of the recycled aggregate are also improved.

[0034] Please see the appendix Figure 4 -Appendix Figure 6 An electric push rod 11 is fixedly installed at the top of the cylinder 10. A sliding disk 12 is fixedly installed at the drive end of the electric push rod 11. The outer wall of the sliding disk 12 is slidably connected to the inside of the cylinder 10. A pressure regulating component 13 is installed on the upper surface of the sliding disk 12. The pressure regulating component 13 includes a fixed rod 131. A magnetic block 132 is fixedly connected to the top of the fixed rod 131. A fixed column 14 is slidably connected to the outer wall of the magnetic block 132. An elastic element 135 is fixedly installed inside the fixed column 14. The elastic element 135 is close to the magnetic block 132. A sliding block 134 is fixedly provided at one end of 32, and a magnetic block 133 is fixedly provided on the lower surface of the sliding block 134. The magnetic block 133 and the magnetic block 132 are magnetically repelled on opposite sides. Multiple holes 9 are provided inside the fixed column 14 and the sliding block 134, and the holes 9 are located above the cylinder 10. The bottom end of the fixed rod 131 is fixedly connected to the upper surface of the sliding disk 12, the outer wall of the fixed column 14 is fixedly connected to the inside of the cylinder 10, and the outer wall of the sliding block 134 is slidably connected to the inside of the fixed column 14.

[0035] Specifically, after the sewage is injected into the cylinder 10, the fine suspended solids remaining in the sewage are filtered by the quartz sand filter plate 17 installed inside the cylinder 10. Then, the activated carbon filter plate 20 adsorbs trace organic impurities and odors in the sewage, improving the final effluent quality. During sewage filtration, the electric push rod 11 is activated to move the sliding disc 12. As the sliding disc 12 moves, the fixing action of the sliding disc 12 and the fixed rod 131 causes the fixed rod 131 to move downwards, further causing the magnetic block 132 to slide out from inside the fixed column 14. When the elastic element 135 releases its own elastic force, it drives the sliding block 134 to slide downward inside the fixed column 14. When the sliding block 134 and the hole 9 inside the fixed column 14 are at the same horizontal line, the outside air will enter the upper chamber of the sliding plate 12 through the hole 9. This will enable the sewage injected into the cylinder 10 to be pressurized and filtered by sliding the sliding plate 12 downward. This will improve the filtration rate and automatically balance the pressure above the sliding plate 12 by sliding the sliding block 134 inside the fixed column 14, ensuring that the pressurized filtration operation can be carried out normally and stably.

[0036] Please see the appendix Figure 4 -Appendix Figure 7 A magnetic coupler 15 is installed at the bottom of the cylinder 10. The drive end of the magnetic coupler 15 is magnetically connected to a disk 16. A quartz sand filter plate 17 is fixedly connected to the outer wall of the disk 16. A cleaning plate 18 is attached to the upper surface of the quartz sand filter plate 17. The outer wall of the cleaning plate 18 is fixedly connected to the inside of the cylinder 10. An adjustment assembly 19 is installed on the outer wall of the disk 16. The adjustment assembly 19 includes a threaded block 192. An activated carbon filter plate 20 is fixedly connected to the outer wall of the threaded block 192. Located directly below the quartz sand filter plate 17, the outer wall of the activated carbon filter plate 20 is slidably connected to the inside of the cylinder 10; the adjustment assembly 19 also includes a reciprocating screw 191, which is installed on the outer wall of the disk 16. The outer wall of the reciprocating screw 191 is threadedly connected to the inside of the threaded block 192. The outer wall of the reciprocating screw 191 is rotatably connected to a fixing frame 193. The outer wall of the fixing frame 193 is fixedly connected to the inside of the cylinder 10, and the inside of the activated carbon filter plate 20 is slidably connected to the outer wall of the fixing frame 193.

[0037] Specifically, when filtering wastewater inside the cylinder 10, the magnetic coupler 15 is activated to rotate the disk 16, which in turn rotates the quartz sand filter plate 17. This achieves centrifugal filtration by rotating the quartz sand filter plate 17, reducing the clogging of the filter holes in the quartz sand filter plate 17 by fine impurities in the wastewater. Simultaneously, the cleaning plate 18 automatically cleans the upper surface of the quartz sand filter plate 17 in real time. When the disk 16 rotates, the fixing action of the disk 16 and the reciprocating screw 191 causes the reciprocating screw 191 to rotate in a fixed position. The internal rotation of the fixed frame 193 further drives the threaded block 192 connected to its outer wall to move up and down reciprocally. When the threaded block 192 moves up and down reciprocally, through the fixing action of the threaded block 192 and the activated carbon filter plate 20, the activated carbon filter plate 20 will be driven to slide up and down on the outer wall of the fixed frame 193. Through the rotation of the quartz sand filter plate 17 and the up and down reciprocating movement of the activated carbon filter plate 20, the risk of impurities in the sewage clogging the filter holes in the quartz sand filter plate 17 can be reduced, while the sewage treatment rate can be improved.

[0038] Please see the appendix Figure 1 -Appendix Figure 3 The cleaning tank 4 is filled with a barium salt-hydroxyphosphoric lime mixed strengthening solution; the rotary sieve cylinder 5 has multiple sieve holes with a diameter of 5-20mm.

[0039] Specifically, the strength of aggregates is improved by soaking them in a salt-hydroxyphosphorus lime mixed strengthening solution.

[0040] Workflow: After sewage is injected into the cylinder 10, it first passes through the quartz sand filter plate 17 inside the cylinder 10 to filter out residual fine suspended solids, and then passes through the activated carbon filter plate 20 to adsorb trace organic impurities and odors. During the sewage filtration process, the electric push rod 11 is activated to move the sliding disc 12, which in turn causes the magnetic block 132 to slide out from inside the fixed column 14. At this time, the elastic element 135 releases its elastic force, causing the sliding block 134 to slide downward inside the fixed column 14. When the sliding block 134 is at the same level as the hole 9 inside the fixed column 14, outside air will enter the upper chamber of the sliding disc 12 through the hole 9. This achieves the effect of pressurizing and filtering the sewage in the cylinder 10 by sliding the sliding disc 12 downward, increasing the filtration rate, and automatically balancing the pressure above the sliding disc 12 by sliding the sliding block 134 inside the fixed column 14, ensuring the stable operation of the pressurized filtration.

[0041] By activating the magnetic coupler 15, the disk 16 rotates, which in turn rotates the quartz sand filter plate 17 to achieve centrifugal filtration. This reduces the risk of fine impurities clogging the filter holes in the quartz sand filter plate 17. At the same time, the cleaning plate 18 automatically cleans the upper surface of the quartz sand filter plate 17 in real time. When the disk 16 rotates, it also drives the reciprocating screw 191 to rotate inside the fixed frame 193, which in turn drives the threaded block 192 to move up and down. At this time, through the fixing effect between the threaded block 192 and the activated carbon filter plate 20, the activated carbon filter plate 20 is further driven to slide up and down on the outer wall of the fixed frame 193. Through the rotation of the quartz sand filter plate 17 and the up and down reciprocating movement of the activated carbon filter plate 20, the effect of both reducing the risk of filter hole clogging and improving the sewage treatment rate is achieved.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A modular on-site recycled aggregate preparation system for construction demolition waste, comprising a multi-stage crushing box (1), characterized in that: A magnetic separator (2) is fixedly installed on the lower surface of the multi-stage crushing box (1). Multiple magnetic adsorption rollers (3) are installed inside the magnetic separator (2). A washing box (4) is fixedly installed on the lower surface of the magnetic separator (2). A rotating screening cylinder (5) is rotatably connected inside the washing box (4). A water pump (6) is installed on the outer wall of the washing box (4). A filter box (7) is fixedly installed at the end of the water pump (6) away from the washing box (4). Multiple grids (8) are installed inside the filter box (7). A water pump (6) is installed on the outer wall of the filter box (7). A cylinder (10) is fixedly installed at the end of the water pump (6) away from the filter box (7).

2. The modular recycled aggregate preparation system for construction demolition waste according to claim 1, characterized in that: An electric push rod (11) is fixedly installed at the top of the cylinder (10), and a sliding disk (12) is fixedly installed at the driving end of the electric push rod (11). The outer wall of the sliding disk (12) is slidably connected to the inside of the cylinder (10), and a pressure regulating component (13) is installed on the upper surface of the sliding disk (12).

3. The modular on-site recycled aggregate preparation system for building demolition waste according to claim 2, characterized in that: The voltage regulating component (13) includes a fixed rod (131), a magnetic block one (132) is fixedly connected to the top of the fixed rod (131), a fixed column (14) is slidably connected to the outer wall of the magnetic block one (132), an elastic element (135) is fixedly arranged inside the fixed column (14), a sliding block (134) is fixedly arranged at one end of the elastic element (135) near the magnetic block one (132), a magnetic block two (133) is fixedly arranged on the lower surface of the sliding block (134), and the magnetic blocks two (133) and the magnetic blocks one (132) are magnetically repelled on opposite sides.

4. The modular on-site recycled aggregate preparation system for building demolition waste according to claim 3, characterized in that: The fixed column (14) and the sliding block (134) are both provided with multiple holes (9), and the holes (9) are located above the cylinder (10).

5. The on-site modular recycled aggregate preparation system for building demolition waste according to claim 3, characterized in that: The bottom end of the fixed rod (131) is fixedly connected to the upper surface of the sliding disk (12), the outer wall of the fixed column (14) is fixedly connected to the inside of the cylinder (10), and the outer wall of the sliding block (134) is slidably connected to the inside of the fixed column (14).

6. The on-site modular recycled aggregate preparation system for building demolition waste according to claim 1, characterized in that: A magnetic coupler (15) is installed at the bottom of the cylinder (10). The drive end of the magnetic coupler (15) is magnetically connected to a disk (16). A quartz sand filter plate (17) is fixedly connected to the outer wall of the disk (16). A cleaning plate (18) is attached to the upper surface of the quartz sand filter plate (17). The outer wall of the cleaning plate (18) is fixedly connected to the inside of the cylinder (10).

7. The modular on-site recycled aggregate preparation system for building demolition waste according to claim 6, characterized in that: An adjustment assembly (19) is installed on the outer wall of the disk (16). The adjustment assembly (19) includes a threaded block (192). An activated carbon filter plate (20) is fixedly connected to the outer wall of the threaded block (192), and the activated carbon filter plate (20) is located directly below the quartz sand filter plate (17). The outer wall of the activated carbon filter plate (20) is slidably connected to the inside of the cylinder (10).

8. The on-site modular recycled aggregate preparation system for building demolition waste according to claim 7, characterized in that: The adjustment assembly (19) also includes a reciprocating screw (191), which is mounted on the outer wall of the disk (16). The outer wall of the reciprocating screw (191) is threadedly connected to the inside of the threaded block (192). The outer wall of the reciprocating screw (191) is rotatably connected to a fixing frame (193). The outer wall of the fixing frame (193) is fixedly connected to the inside of the cylinder (10). The inside of the activated carbon filter plate (20) is slidably connected to the outer wall of the fixing frame (193).

9. A modular on-site recycled aggregate preparation system for building demolition waste according to claim 1, characterized in that: The cleaning tank (4) is filled with a barium salt-hydroxyphosphorus lime mixed reinforcement solution.

10. A modular on-site recycled aggregate preparation system for building demolition waste according to claim 1, characterized in that: The rotating sieve cylinder (5) has multiple sieve holes inside, and the diameter of the sieve holes is 5-20mm.

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