Intelligent feeding method and device for multi-stage modified construction waste powder resource utilization

Abstract

This invention provides a method and apparatus for the intelligent feeding and multi-stage modification of construction waste micro-powder for resource recovery. Raw materials are fed into a planetary ball mill chamber according to a preset ratio via an intelligent feeding system. Combined with microwave polarization and ultrasonic dynamic grading, aggregate surface activation and gradation optimization are achieved. Subsequently, a fluidized bed-roller coating device completes precise coating and gradient drying of a nanocomposite coating, enhancing the interfacial bonding between the aggregate and the polymer matrix. UV-LED and infrared radiation synergistically cure the aggregate to form a dense composite structure. Finally, three-dimensional morphology scanning and a multi-functional testing platform monitor performance in real time. A closed-loop control system optimizes process parameters, achieving automatic classification and standardized packaging of recycled aggregates. This technology improves the performance and utilization efficiency of recycled aggregates, promoting the high-value utilization of construction solid waste.

Description

Technical Field

[0001] This invention relates to the technical field of solid waste resource utilization and recycled building materials, and particularly to the multi-stage modification treatment and intelligent utilization of construction waste aggregate powder. Background Technology

[0002] Existing technologies for recycling construction waste aggregates face multiple challenges: traditional processes rely excessively on manual visual inspection and mechanical screening in the raw material sorting stage, making it difficult to accurately separate concrete debris, brick and tile particles, and lightweight impurities (such as plastic and wood chips), resulting in significant fluctuations in the purity of recycled aggregates; conventional ball mills, using a single impact crushing mode to process high-hardness silicate components, suffer significant energy losses, easily leading to degradation of aggregate surface properties; the physical adsorption coating formed by spraying methods exhibits bonding defects at the aggregate-matrix interface, which, combined with the temperature gradient effect of the thermosetting process, further exacerbates the instability of the internal structure of the recycled materials. These technical bottlenecks collectively restrict the engineering applicability of construction waste resource products, urgently requiring systemic breakthroughs through intelligent sorting, multi-dimensional energy synergy, and interface strengthening technologies.

[0003] In summary, existing technologies have not established a comprehensive collaborative system covering the entire process of raw material transportation, modification, coating, curing, and testing. Therefore, their performance improvements are limited, energy consumption reductions are limited, and they fail to fundamentally resolve the contradiction between VOC emission control and the stability of large-scale production. Summary of the Invention

[0004] The purpose of this invention is to address the technical challenges faced by traditional construction waste aggregate recycling technologies, such as insufficient raw material sorting accuracy, low energy conversion efficiency, and interface functionalization defects. It proposes a method for enhancing the functionalization of recycled aggregates based on intelligent feeding and multi-stage modification. By constructing a fully intelligent control system encompassing refined raw material sorting, mechanical-microwave synergistic activation, gradient interface coating, and photothermal coupling curing, the invention achieves efficient activation, uniform coating, and stable curing of construction waste powder. This significantly improves the interfacial bonding strength between recycled aggregates and the polymer matrix, reduces energy consumption and carbon emissions during the recycled material preparation process, and provides a systematic solution for the high-value utilization of construction solid waste.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A method for the intelligent feeding and multi-stage modified construction waste powder resource utilization includes the following steps:

[0007] Step S1: Intelligent sorting and feeding: Through the AI ​​vision recognition system and conveying sorting system, concrete debris, brick and tile particles and light impurities are removed and accurately conveyed to the planetary ball mill chamber according to the preset ratio, while functional additives are added at the same time.

[0008] Step S2: Dual-core activation modification: Shear stress is applied in the planetary ball mill chamber, and the aggregate is simultaneously activated by an alternating microwave electric field;

[0009] Step S3: Multimodal classification: The aggregate is classified by particle size and its purity is improved using an ultrasonic generator, an inertial separation chamber and a dynamic screening mechanism.

[0010] Step S4: Gradient coating: Reactive gas is introduced into the plasma activation chamber to form active functional groups, and a nanocomposite coating is deposited on the surface by atomization after gradient heating treatment.

[0011] Step S5: Photothermal co-curing: Uniform curing of aggregate surface is achieved by combining UV-LED light curing device with infrared radiation heating and gradient temperature control system;

[0012] Step S6: Intelligent Detection and Packaging: Through three-dimensional morphology scanning and a multi-functional testing platform, the microstructure and service performance of recycled materials are monitored in real time. Combined with a closed-loop control system, process parameters are corrected and finished product packaging is completed.

[0013] Preferably, in step S1, the AI ​​visual recognition system is linked with the conveying and sorting system to achieve automatic recognition and rejection of aggregate color, morphology and size.

[0014] Preferably, in step S2, the planetary ball mill chamber adopts a double-layer cylindrical planetary ball structure. The planetary motion of the stirring paddle inside the planetary ball mill chamber generates shear stress, which forms a coupled field with the alternating electric field generated by the microwave cavity. The construction waste aggregate undergoes periodic extrusion, friction and polarization effects inside the cylinder, realizing chemical bond recombination and surface energy enhancement. The system has a built-in multi-channel infrared temperature measurement network to control the ball mill temperature gradient in real time, avoiding secondary decomposition of cement hydration products in the aggregate due to local overheating.

[0015] Preferably, in the multimodal grading process of step S3, the ultrasonic generator adopts a piezoelectric ceramic transducer array. The ultrasonic generator is subjected to high-frequency sound waves in the ultrasonic cavitation zone. Microcracks expand under the impact of micro-jets generated by the collapse of cavitation bubbles. The mixture treated by the sound field enters the inertial separation chamber, and particle size classification is achieved under the combined action of centrifugal force and gravity. The graded material is then screened a second time by a dynamic screening mechanism to ensure that the particle size distribution meets the matching requirements of recycled aggregate and polymer matrix composite, and effectively separates the active components for surface coating.

[0016] Preferably, in step S4, capacitively coupled plasma is used to etch and activate the aggregate surface during gradient coating, and a nano-TiO2 / PDMS composite coating is deposited under the action of an atomizing nozzle and an electrostatic field.

[0017] Preferably, in step S5, photothermal co-curing involves emitting multi-wavelength spectra through a UV-LED curing device array, while simultaneously maintaining curing uniformity using a metal-based infrared heater and a phase change material temperature control system.

[0018] This invention also provides a construction waste aggregate powder processing device for a smart feeding multi-stage modified construction waste powder resource utilization method, comprising an AI visual recognition system, a micro-metering pump, a planetary ball mill chamber, an ultrasonic generator, a cyclone separator, a settling chamber, an ionization activation chamber, a multi-layer sleeve-type heating furnace, a dual-fluid atomizer, a UV-LED light curing device, an infrared radiation heater, and a three-dimensional morphology scanner connected in sequence.

[0019] The AI ​​visual recognition system has its input end connected to the feeding and conveying mechanism for online sorting of waste concrete fragments, and its output end connected to the feed inlet of the planetary ball mill chamber.

[0020] The micro-metering pump has its input end connected to a silane coupling agent storage tank and its output end connected to a mixing port inside the planetary ball mill chamber, and is used to add coupling agent during the grinding process.

[0021] The planetary ball mill chamber has its discharge port connected to the dynamic grading zone where the ultrasonic generator is located via a pneumatic conveying pipeline.

[0022] The ultrasonic generator has its processing chamber outlet connected to a cyclone separator, the lower part of which is connected to the settling chamber for settling fine particles, and the coarse particle outlet of the cyclone separator is reconnected to the planetary ball mill chamber through a return pipe.

[0023] The settling chamber has its outlet connected to the plasma activation chamber;

[0024] The discharge port of the plasma activation chamber is connected to the feed end of the multi-layer sleeve heating furnace;

[0025] The multi-layer sleeve-type heating furnace has its outlet connected to a dual-fluid atomizer, and the dual-fluid atomizer is equipped with an infrared lamp heating unit.

[0026] The dual-fluid atomizer is connected in sequence at its outlet end to a UV-LED light curing device and an infrared radiation heater.

[0027] The discharge end of the infrared radiation heater is connected to the detection channel of the three-dimensional topography scanner, and the output end of the three-dimensional topography scanner is connected to the automatic packaging unit for outputting qualified aggregate products.

[0028] Preferably, the planetary ball mill chamber adopts a double-layer cylindrical structure, and the planetary ball mill chamber is equipped with a variable speed stirring paddle and wear-resistant liner, as well as a dynamic torque sensor and a temperature monitoring module.

[0029] Preferably, the plasma activation chamber introduces silane coupling agent gas through capacitive coupling discharge and is equipped with an electron density monitoring probe.

[0030] Preferably, the closed-loop control system transmits the detection data to the central processing unit via industrial Ethernet, generates process correction instructions through neural network model analysis, and dynamically adjusts them through the micro-metering pump flow regulating valve, microwave power modulator, and spraying air pressure controller.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] (1) Raw material fine sorting capability

[0033] This invention uses AI visual recognition and dynamic separation technology to accurately remove concrete debris, brick and tile particles, and lightweight impurities (such as plastic and wood chips) from construction waste, solving the problem of low recognition rate of fine impurities smaller than 5mm in traditional sorting processes, and laying the foundation for efficient activation of recycled aggregates.

[0034] (2) Energy synergistic efficiency mechanism

[0035] This invention innovatively combines mechanical shearing with microwave-induced polarization to target and crush high-hardness silicate components (such as granite fragments) in construction waste, avoiding overheating and activity decay of aggregate surfaces caused by ineffective energy dissipation, and significantly improving energy conversion efficiency.

[0036] (3) Interface functional enhancement technology

[0037] This invention uses gradient heating coating and plasma activation processes to etch and reorganize inert components (such as calcium oxide) on the surface of aggregates to form an active transition layer, which effectively improves the interfacial bonding quality between recycled aggregates and polymer matrix, and enhances the overall service performance of recycled materials.

[0038] (4) Uniform curing control system

[0039] This invention employs a UV-LED curing device and a composite energy field of infrared radiation, combined with gradient temperature control technology, to solve the problem of residual stress concentration caused by the temperature difference between the center and the surface in traditional thermosetting processes, thereby ensuring the uniformity and stability of the microstructure of recycled materials.

[0040] (5) Intelligent control system for the whole process

[0041] This invention uses a closed-loop feedback mechanism to optimize key parameters such as sorting accuracy, activation intensity, and coating thickness in real time, overcoming the process adaptation challenges caused by fluctuations in the composition of construction waste and ensuring batch-to-batch consistency of recycled product performance.

[0042] (6) Resource-based closed-loop solution

[0043] This invention integrates closed-loop powder processing and pollutant control technologies to achieve the recycling of construction waste powder, avoiding dust and VOC emissions; and significantly increases the added value of recycled aggregates through functional modification, promoting the transformation and upgrading of solid waste from low-end landfill to high-value building materials.

[0044] In summary, this invention addresses the technical challenges of insufficient raw material sorting accuracy, low energy conversion efficiency, and interface functionalization defects in traditional construction waste aggregate recycling technologies. It proposes a method for enhancing the functionalization of recycled aggregates based on intelligent feeding and multi-stage modification. By constructing a fully intelligent control system encompassing refined raw material sorting, mechanical-microwave synergistic activation, gradient interface coating, and photothermal coupling curing, it achieves efficient activation, uniform coating, and stable curing of construction waste powder. This significantly improves the interfacial bonding strength between recycled aggregates and the polymer matrix, reduces energy consumption and carbon emissions during the recycled material preparation process, and provides a systematic solution for the high-value utilization of construction solid waste. Attached Figure Description

[0045] Figure 1 A schematic diagram of the process flow for a method for the intelligent feeding and multi-stage modified construction waste powder resource utilization, provided as an embodiment of the present invention;

[0046] Figure 2 This is a schematic diagram of a method for the intelligent feeding and multi-stage modified construction waste powder resource utilization, provided as an embodiment of the present invention.

[0047] The serial numbers in the diagram are as follows:

[0048] 1. AI visual recognition system; 2. Micro-metering pump; 3. Planetary ball mill chamber; 4. Ultrasonic generator; 5. Cyclone separator; 6. Settling chamber; 7. Plasma activation chamber; 8. Multi-layer sleeve heating furnace; 9. Dual-fluid atomizer; 10. UV-LED light curing device; 11. Infrared radiation heater; 12. 3D topography scanner. Detailed Implementation

[0049] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0050] like Figure 1 As shown in this embodiment, a method for the intelligent feeding and multi-stage modified construction waste powder resource utilization is provided, including the following steps:

[0051] Step S1: Intelligent sorting and feeding: The construction waste aggregate powder is sorted online through an AI vision recognition system and accurately fed to the planetary ball mill chamber according to a preset ratio. Functional additives (such as coupling agents) are added simultaneously to solve the interface bonding defects caused by the complex raw material composition in traditional processes.

[0052] Step S2: Dual-core activation modification: Shear stress is applied in the planetary ball mill chamber, and an alternating microwave electric field is used simultaneously to activate the inert components (such as silicates and calcium oxide) on the surface of the aggregate powder. By dynamically adjusting the ball milling parameters, chemical bond recombination and surface energy enhancement are achieved, avoiding activity decay caused by over-milling.

[0053] In this embodiment, the dual-core activation modification equipment includes a planetary ball mill chamber 3 with a double-layer cylindrical planetary ball structure, a microwave excitation unit, and a mechanical stress application system.

[0054] The planetary ball mill chamber 3 is equipped with a variable speed stirring paddle and wear-resistant liners, and features a dynamic torque sensing and temperature monitoring module.

[0055] Microwave excitation unit: 2450MHz magnetron array, equipped with a power density segmented controller and microwave leakage protection shield.

[0056] Mechanical stress application system: an eccentric wheel assembly driven by a variable frequency motor, in conjunction with a pressure sensor to achieve dynamic adjustment of shear force.

[0057] To address the high proportion of inert components such as silicates and calcium oxide in construction waste aggregate powder, the planetary motion of the stirring paddles in the planetary ball mill chamber 3 generates shear stress, which couples with the alternating electric field generated by the microwave cavity of the microwave excitation unit. The construction waste aggregate undergoes periodic extrusion, friction, and polarization effects within the mill, achieving chemical bond recombination and surface energy enhancement. The system incorporates a multi-channel infrared temperature measurement network to control the ball mill temperature gradient in real time, preventing secondary decomposition of cement hydration products in the aggregate due to local overheating.

[0058] Step S3: Multimodal grading: including ultrasonic generator 4, inertial separation chamber and dynamic screening mechanism.

[0059] Ultrasonic generator: Employs a sandwich-type cavity structure, integrating a piezoelectric ceramic transducer array and a sound field focusing lens. Inertial separation chamber: A combination of a cyclone separator and an inertial settling chamber, equipped with adjustable guide vane assembly.

[0060] Dynamic screening mechanism: a linkage device between a high-frequency vibrating screen and a pneumatic sorting nozzle.

[0061] An ultrasonic generator, an inertial separation chamber, and a dynamic screening mechanism are used to classify aggregates by particle size and improve their purity.

[0062] In this embodiment, during the multimodal grading process in step S3, the ultrasonic generator 4 employs a piezoelectric ceramic transducer array. Concrete fragments, brick and tile particles mixed in the construction waste aggregate powder are subjected to high-frequency sound waves in the ultrasonic cavitation zone of the ultrasonic generator 4. Microcracks expand under the impact of micro-jets generated by the collapse of cavitation bubbles. The mixture treated by the sound field enters the inertial separation chamber, where particle size grading is achieved under the combined action of centrifugal force and gravity. The graded material is then subjected to secondary sieving by a dynamic screening mechanism to ensure that the particle size distribution meets the matching requirements of the recycled aggregate and the polymer matrix composite, effectively separating the active components for surface coating.

[0063] Step S4: Gradient coating: A layered structure design is adopted, including an ionization activation chamber 7, a multi-layer sleeve-type heating furnace 8, and a dual-fluid atomizer 9.

[0064] Plasma activation chamber 7: Capacitively coupled discharge chamber, equipped with a gas flow control system and an electron density monitoring probe.

[0065] Multi-layer shell-and-tube heating furnace 8: Multi-layer shell-and-tube heating furnace with built-in thermocouple matrix and phase change heat storage material.

[0066] Dual-fluid atomizer 9: Combination module of dual-fluid atomizing nozzle and electrostatic adsorption device.

[0067] After ultrasonic cavitation and inertial separation treatment by ultrasonic generator 4, the aggregate powder enters the plasma activation chamber 7, the multi-layer sleeve-type heating furnace 8, and the dual-fluid atomizer 9. In the plasma activation chamber 7, an inert or reactive gas (such as argon) containing a silane coupling agent is introduced. Low-temperature plasma is generated through capacitive coupling high-voltage discharge, bombarding and etching the surface of the aggregate particles, destroying the surface inert layer, forming active functional groups, and significantly increasing the surface energy of the aggregate. The activated aggregate particles are then sent to the multi-layer sleeve-type heating furnace 8, sequentially passing through a low-temperature drying zone (approximately 50 ℃), a medium-temperature plasticizing zone (approximately 150 ℃), and a high-temperature setting zone (approximately 250 ℃). The aggregate particles are heated to ℃ to gradually remove surface adsorbed moisture, soften the particle surface, and stabilize the aggregate surface morphology, providing a good substrate for subsequent coating adhesion. After heat treatment, the aggregate particles enter the dual-fluid atomizer 9, where the composite coating slurry containing nano-TiO2 / PDMS is atomized through the dual-fluid atomizing nozzle. Under the action of an electrostatic field, the coating particles are directionally adsorbed and deposited on the aggregate surface, and then rapidly dried with an infrared lamp to form a uniform and continuous composite coating transition layer, which enhances the interfacial bonding force between the aggregate and the polymer matrix.

[0068] Through the three-stage synergistic treatment of plasma activation, gradient heating, and electrostatic atomization, a dense and continuous nanocomposite transition layer is formed, thereby achieving enhanced interfacial bonding between the aggregate and the polymer matrix.

[0069] Step S5: Photothermal Co-curing: The aggregate particles coated in step S4 are sequentially fed into the UV-LED curing device 10 and the infrared radiation heater 11 combined with a gradient temperature control system to achieve uniform curing of the aggregate surface.

[0070] UV-LED curing module: multi-wavelength array light-emitting chip, light distribution system to achieve parallel beam shaping.

[0071] Infrared radiation heater: The surface of the metal substrate is coated with a selective absorption coating and equipped with a radiation intensity adjustment baffle.

[0072] Gradient temperature control system: a module integrating phase change material energy storage unit and PID temperature control algorithm.

[0073] To address the issue of uneven curing at the interface between recycled aggregates from construction waste and polymer resins, a UV-LED curing device (array 10) emits multi-wavelength ultraviolet light to induce a polymerization reaction of photosensitive groups in the aggregate surface coating, achieving rapid surface curing. Simultaneously, a metal-based infrared radiation heater (array 11) penetrates the coating, gradually transferring heat to the interior of the aggregate, achieving a gradient heating process from the outside in. A gradient temperature control system, combined with the heat absorption and release characteristics of the phase change material, balances the internal and external temperature differences, forming a uniform curing gradient. The system incorporates a fiber optic sensor network to monitor the curing process in real time, focusing on areas with dense aggregate to ensure uniform curing at the coating-aggregate interface, eliminate residual stress concentration, and improve the interfacial bonding and mechanical stability between the recycled aggregate and the polymer matrix.

[0074] Through the above-mentioned photo-thermal coupling curing process, a dense and continuous composite structure layer is formed, which improves the interfacial bonding force and overall mechanical stability of the recycled aggregate and the polymer matrix.

[0075] Step S6: Intelligent detection and packaging: The recycled aggregate after the curing treatment in step S5 is sequentially fed into the detection unit consisting of a three-dimensional topography scanner 12 and a multi-functional performance testing platform.

[0076] 3D Topography Scanner 12: Dual-mode switching between laser triangulation and confocal microscopy.

[0077] X-ray fluorescence analyzer: a system for simultaneous detection of light elements (B~F) and heavy elements (Na~U).

[0078] Multifunctional testing platform: includes abrasion tester, dielectric property tester and damp heat aging chamber.

[0079] A 3D topography scanner 12 performs non-contact online inspection of the surface geometry, size distribution, and defects of aggregate particles. A multi-functional testing platform monitors key service performance indicators such as mechanical properties and wear resistance of the aggregate in real time. Inspection data is transmitted in real time to a closed-loop control system via industrial Ethernet. Combined with neural network model analysis results, process correction instructions are generated to dynamically adjust various process parameters at the front end, achieving adaptive process optimization. The actuators include: a metering pump flow control valve (automatically adjusting the coupling agent dosage based on fluctuations in construction waste composition), a microwave power modulator (dynamically adjusting the activation intensity based on aggregate moisture content), and a spraying air pressure controller (adapting to the coating requirements of aggregates of different particle sizes). The system also incorporates a self-diagnostic fault module, supports remote operation and maintenance access, and features a heavy metal leaching detection and early warning function for construction waste. Qualified recycled aggregate particles are automatically classified, metered, and standardized for packaging; unqualified products are automatically rejected, ensuring batch stability and the quality of the recycled product.

[0080] Through the aforementioned intelligent detection and closed-loop control, the performance stability of recycled aggregates between batches is ensured, and the automated classification and standardized packaging of resource-based products are realized.

[0081] In addition, such as Figure 2 As shown, the construction waste aggregate powder processing device according to the intelligent feeding multi-stage modified construction waste powder resource utilization method includes an AI visual recognition system 1, a micro-metering pump 2, a planetary ball mill chamber 3, an ultrasonic generator 4, a cyclone separator 5, a settling chamber 6, an ionization activation chamber 7, a multi-layer sleeve heating furnace 8, a dual-fluid atomizer 9, a UV-LED light curing device 10, an infrared radiation heater 11, and a three-dimensional morphology scanner 12, connected in sequence.

[0082] AI visual recognition system 1, whose input end is connected to the feeding and conveying mechanism, is used to sort waste concrete fragments online, and whose output end is connected to the feed port of planetary ball mill chamber 3;

[0083] The micro-metering pump 2 has its input end connected to the silane coupling agent storage tank and its output end connected to the mixing port inside the planetary ball mill chamber 3, and is used to add coupling agent during the grinding process.

[0084] The planetary ball mill chamber 3 has its discharge port connected to the dynamic grading zone where the ultrasonic generator 4 is located via a pneumatic conveying pipeline.

[0085] The ultrasonic generator 4 has its processing chamber outlet connected to the cyclone separator 5. The lower part of the cyclone separator 5 is connected to the settling chamber 6 for settling fine particles. The coarse particle outlet of the cyclone separator 5 is reconnected to the planetary ball mill chamber 3 through a return pipe.

[0086] Settling chamber 6, the outlet of which is connected to plasma activation chamber 7;

[0087] The plasma activation chamber 7 has its outlet connected to the feed end of the multi-layer sleeve-type heating furnace 8;

[0088] The multi-layer sleeve-type heating furnace 8 has its outlet connected to a dual-fluid atomizer 9, and the dual-fluid atomizer 9 is equipped with an infrared lamp heating unit.

[0089] The dual-fluid atomizer 9 is connected in sequence to the UV-LED light curing device 10 and the infrared radiation heater 11 at its outlet end;

[0090] The discharge end of the infrared radiation heater 11 is connected to the detection channel of the three-dimensional topography scanner 12, and the output end of the three-dimensional topography scanner 12 is connected to the automatic packaging unit for outputting qualified aggregate products.

[0091] The planetary ball mill chamber 3 adopts a double-layer cylindrical structure. The planetary ball mill chamber 3 is equipped with a variable speed stirring paddle and wear-resistant lining plate, as well as a dynamic torque sensor and temperature monitoring module.

[0092] Furthermore, in this embodiment, the plasma activation chamber 7 introduces silane coupling agent gas through capacitive coupling discharge and is equipped with an electron density monitoring probe.

[0093] Furthermore, in this embodiment, the closed-loop control system transmits the detection data to the central processing unit via industrial Ethernet, generates process correction instructions through neural network model analysis, and dynamically adjusts them through the flow regulating valve of the micro metering pump 2, the microwave power modulator, and the spraying air pressure controller.

[0094] The following details the specific raw materials and parameters:

[0095] In this embodiment, quartz sand is used as the raw material, and the process parameters are set as follows:

[0096] Step S1: Intelligent sorting and feeding

[0097] An AI visual recognition system 1 is used to sort waste concrete fragments online. The system includes a high-speed camera and a deep learning algorithm to separate aggregate particles with a particle size of 5-20mm in real time. Lightweight impurities such as plastic and wood chips are separated from the aggregate by negative pressure airflow. The aggregate powder and polymer resin are transported to the planetary ball mill chamber 3 in a ratio of 8:1. At the same time, silane coupling agent is added through a micro metering pump 2.

[0098] Step S2: Binary activation modification

[0099] Inside the planetary ball mill chamber 3, the aggregate powder and polymer resin are mixed and then activated by the synergistic effect of planetary ball milling and microwave activation to activate the silicate inert components. The mixture is then output from the planetary ball mill chamber 3 and conveyed by pneumatic conveying into the ultrasonic dynamic classification zone.

[0100] Step S3: Multimodal classification

[0101] High-frequency ultrasonic waves are generated by ultrasonic generator 4, creating a cavitation effect on the aggregate surface and forming micro-jet impacts that peel off weakly bonded particles from the aggregate surface, releasing active sites. The aggregate then enters cyclone separator 5. Coarse particles, due to their high inertia, are thrown towards the outer wall and settle along the wall surface. Fine particles, due to their low inertia, enter settling chamber 6, while coarse particles return to planetary ball mill chamber 3 for further grinding.

[0102] Step S4: Gradient Covering

[0103] The ultrafine aggregate separated in the inertial separation stage enters the plasma activation chamber 7 to form active functional groups, ensuring etching uniformity. It then enters a multi-layer sleeve-type heating furnace 8, passing through a low-temperature drying zone, a medium-temperature plasticizing zone, and a high-temperature setting zone to enhance coating adhesion and fix the aggregate surface morphology. Finally, it enters a dual-fluid atomizer 9 to evenly cover the aggregate surface with the slurry, aided by infrared lamps for rapid coating drying.

[0104] Step S5: Photothermal Co-curing

[0105] The aggregate passes through UV-LED10 and infrared radiation heater11 in sequence, which penetrate the coating surface to transfer heat. The gradient temperature control system eliminates internal stress and forms a dense composite structure, preventing the recycled aggregate from debonding from the matrix.

[0106] Step S6: Intelligent Detection and Packaging

[0107] The finished product is scanned by a 3D topography scanner 12, which automatically removes unqualified products and encapsulates qualified particles into special aggregates for permeable bricks for roads.

[0108] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0109] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0110] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An intelligent feeding multi-stage modified construction waste micro-powder resource processing system, characterized in that, It comprises AI visual recognition system (1), micro-dosing pump (2), planetary ball mill bin (3), ultrasonic generator (4), cyclone separator (5), settling chamber (6), plasma activation bin (7), multi-layer sleeve type heating furnace (8), double-fluid atomizer (9), UV-LED light curing device (10), infrared radiation heater (11), three-dimensional topography scanner (12) connected in sequence. The AI visual recognition system (1) is connected with the feeding conveying mechanism at the input end, used for online sorting of waste concrete chunks, and the output end is connected with the feeding port of the planetary ball mill bin (3); The micro-dosing pump (2) is connected with the silane coupling agent storage tank at the input end, and is communicated with the mixing port in the planetary ball mill bin (3) at the output end, used for adding coupling agent during grinding process; The planetary ball mill bin (3) is connected with the dynamic classification area of the ultrasonic generator (4) through the pneumatic conveying pipeline at the discharge port; The outlet of the ultrasonic generator (4) is connected with the cyclone separator (5), and the lower part of the cyclone separator (5) is connected with the settling chamber (6) for settling fine particles, and the coarse particle outlet of the cyclone separator (5) is reconnected with the planetary ball mill bin (3) through the reflux pipeline; The outlet of the settling chamber (6) is connected with the plasma activation bin (7); The outlet of the plasma activation bin (7) is communicated with the feeding end of the multi-layer sleeve type heating furnace (8); The outlet of the multi-layer sleeve type heating furnace (8) is connected with the double-fluid atomizer (9), and the double-fluid atomizer (9) is externally provided with an infrared lamp heating unit; The outlet of the double-fluid atomizer (9) is sequentially connected with the UV-LED light curing device (10) and the infrared radiation heater (11); The outlet of the infrared radiation heater (11) is connected with the detection channel of the three-dimensional topography scanner (12), and the output end of the three-dimensional topography scanner (12) is connected with an automatic packaging unit, used for outputting qualified aggregate products; The treatment includes the following steps: Step S1: intelligent sorting and feeding: through the AI visual recognition system and the conveying and sorting system, remove concrete debris, brick and tile particles and light impurities, accurately convey to the planetary ball mill bin (3) according to the preset ratio, and add functional additives simultaneously; Step S2: double-core activation modification: shear stress is applied in the planetary ball mill bin, and the aggregate is simultaneously activated by the microwave alternating electric field; the planetary ball mill bin (3) in step S2 adopts a double-layer cylinder planetary ball structure, and the shear stress is generated by the planetary motion of the stirring paddle in the planetary ball mill bin (3), and the alternating electric field generated by the microwave cavity forms a coupling field; the building waste aggregate experiences periodic extrusion, friction and polarization effect in the cylinder, realizes chemical bond reorganization and surface energy improvement; the system is provided with a multi-channel infrared temperature measurement network, which can real-time control the temperature gradient of the ball mill, and avoid the secondary decomposition of cement hydration products in the aggregate due to local overheating; Step S3: multi-modal classification: use ultrasonic generator, inertial separation cabin and dynamic screening mechanism to classify particle size and improve purity of aggregate; Step S4: Gradient coating: Introduce reactive gas in the ion plasma activated bin to form active functional groups, and after gradient temperature treatment, nano composite coating is deposited on the surface by atomization; In the step S4, the surface of the aggregate is etched and activated by capacitive coupling plasma, and the nano TiO2 / PDMS composite coating is deposited under the action of the atomization nozzle and the electrostatic field. Step S5: Photothermal synergistic curing: Through the combination of UV-LED photocuring device and infrared radiation heating, the gradient temperature control system realizes the uniform curing of the aggregate surface. Step S6: Intelligent detection and packaging: Through three-dimensional topography scanning and multifunctional testing platform, the microstructure and service performance of the recycled material are monitored in real time, and the process parameters are corrected combined with the closed-loop control system and the finished product packaging is completed.

2. The intelligent feeding multi-stage modified construction waste micro-powder resource treatment system according to claim 1, characterized in that, In the step S1, the AI visual recognition system is linked with the conveying and sorting system to realize automatic identification and rejection of the color, morphology and size of the aggregate.

3. The intelligent feeding multi-stage modified construction waste micro-powder resource treatment system according to claim 1, characterized in that, In the step S3, the ultrasonic generator (4) adopts a piezoelectric ceramic transducer array. The mixture treated by the sound field enters the inertial separation cabin under the action of high-frequency sound waves in the ultrasonic cavitation zone. The micro-cracks are expanded under the impact of micro-jet generated by the collapse of cavitation bubbles. The graded materials are subjected to secondary screening through a dynamic screening mechanism to ensure that the particle size distribution meets the matching requirements of recycled aggregate and polymer matrix composite, and the active components are effectively separated for surface coating.

4. The intelligent feeding multi-stage modified construction waste micro-powder resource treatment system according to claim 1, characterized in that, In the step S5, the photothermal synergistic curing is realized by the UV-LED photocuring device array emitting multi-wavelength spectrum, and the metal-based infrared heater and phase change material temperature control system are used to maintain the uniformity of curing. 5.The intelligent feeding multi-stage modified construction waste micro-powder resource treatment system according to claim 1, characterized in that, The planetary ball mill bin (3) adopts a double-layer cylinder structure, and the planetary ball mill bin (3) is provided with variable-speed stirring paddles and wear-resistant lining plates, and is provided with a dynamic torque sensor and a temperature monitoring module. 6.The intelligent feeding multi-stage modified construction waste micro-powder resource treatment system according to claim 1, characterized in that, The ion plasma activated bin (7) introduces silane coupling agent gas by capacitive coupling discharge method, and is provided with an electron density monitoring probe.

7. The intelligent feeding multi-stage modified construction waste micro-powder resource treatment system according to claim 1, characterized in that, The closed-loop control system transmits the detection data to the central processor through industrial Ethernet, analyzes the process correction instructions through the neural network model, and dynamically adjusts through the flow regulating valve of the micro-metering pump (2), the microwave power modulator and the spraying air pressure controller.

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