Carbon dioxide smart carbonation curing system and method based on recycled aggregates

Abstract

The application discloses a carbon dioxide intelligent carbonation maintenance system based on recycled aggregate and a method thereof, which comprises a maintenance bin body, a storage tank, an intelligent control platform, a gas pressure circulation control system, a ventilation system, a data acquisition and control system and a safety protection system, a monitoring module is arranged on the right side of the maintenance bin body, the monitoring module comprises a gas pressure sensor, a temperature and humidity sensor and a concentration sensor which are installed on the right side of the maintenance bin body, and a temperature and humidity controller is installed at the upper end of the maintenance bin body. Through recycling of waste concrete, the waste concrete is converted into recycled aggregate which is used for preparing porous concrete, so that the waste disposal problem is solved, natural resources are saved, and the concrete performance optimization and green low-carbon building technology development can be promoted to a certain extent. In the process of concrete maintenance, water mist can be uniformly sprayed on each concrete, so that the moisture retention effect on the concrete is ensured.

Description

Technical Field

[0001] This invention relates to the field of recycled aggregate processing technology, and in particular to a carbon dioxide intelligent carbonization curing system and method based on recycled aggregate. Background Technology

[0002] With the acceleration of global urbanization, the amount of waste concrete generated is increasing day by day, posing a serious challenge to the ecological environment and resource recycling. On the other hand, traditional aggregate resources are limited and the mining process is prone to environmental damage. At the same time, the demand for low-carbon, environmentally friendly and ecological restoration materials in the concrete industry is also increasing. Therefore, it is necessary to carry out resource recycling of waste concrete.

[0003] Due to the high porosity and water absorption of recycled aggregates from waste concrete, they possess a natural advantage in absorbing and fixing carbon dioxide. Therefore, using carbon dioxide to cure porous concrete prepared from recycled aggregates is a highly promising new technology. First, through the carbon dioxide curing process, a chemical reaction can be achieved between alkaline substances inside the concrete and CO2. This process is equivalent to solidifying atmospheric CO2 within the concrete, which helps to achieve carbon capture and sequestration. Second, this process can significantly reduce the pH value of the concrete. The resulting porous concrete can provide a more suitable microenvironment for vegetation sites and can be used in various scenarios such as vegetated concrete and vertical greening, expanding the application range of porous concrete made from recycled aggregates. In addition, carbon dioxide curing also helps to improve the early and later strength of concrete and enhance its durability, which undoubtedly opens up new avenues for performance improvement in porous concrete prepared from recycled aggregates. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a carbon dioxide intelligent carbonization curing system and method based on recycled aggregates. This system recycles waste concrete into recycled aggregates for the preparation of porous concrete, solving the waste disposal problem and conserving natural resources. It can also promote the optimization of concrete performance and the development of green and low-carbon building technologies to a certain extent. Furthermore, during the concrete curing process, water mist can be evenly sprayed onto each concrete surface, ensuring a good moisture retention effect.

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

[0006] The intelligent carbon dioxide carbonization curing system based on recycled aggregate includes a curing silo, a storage tank, an intelligent control platform, a gas pressure circulation control system, a ventilation system, a data acquisition and control system, and a safety protection system. A monitoring module is located on the right side of the curing silo, including a pressure sensor, a temperature and humidity sensor, and a concentration sensor. A temperature and humidity controller is installed at the top of the curing silo. The gas pressure circulation control system includes an air pump connected to the storage tank via a carbon dioxide inlet pipe. The air pump is also connected to the top space of the curing silo via a curing silo inlet pipe and to the bottom space via a curing silo return air pipe. The curing silo inlet pipe, carbon dioxide inlet pipe, and curing... Valves are installed on the return air ducts of the curing chamber, and pressure gauges are installed on the storage tanks. The curing chamber itself contains a placement assembly and a water mist spraying system. The placement assembly includes two vertical plates disposed within the curing chamber. A first rotating rod is rotatably connected through each of the two vertical plates. A disc is fixedly connected to the adjacent sides of each of the two first rotating rods. Multiple short rods are fixedly connected to the adjacent sides of each of the two discs. A cylindrical sleeve is fitted onto each short rod. A connecting rod is fixedly connected to the lower end of each cylindrical sleeve. A placement plate is fixedly connected to the lower ends of every two mating connecting rods. Multiple clamping assemblies are provided at the upper end of each placement plate. A drive motor is installed on the vertical plate on the left side, and the output shaft of the drive motor is fixedly connected to the first rotating rod on the left side.

[0007] Preferably, the water mist spraying system includes two mounting blocks disposed at the top of the curing chamber body. A second rotating rod is rotatably connected to adjacent sides of the two mounting blocks. A first threaded layer is provided on the second rotating rod, and a movable block is threadedly connected to the first threaded layer. A horizontal plate is fixedly connected to the lower end of the movable block. Two rectangular blocks are fixedly connected to the lower end of the horizontal plate. A round rod is fixedly connected to adjacent sides of the two rectangular blocks. Multiple atomizing nozzles are sleeved on the round rod. A connecting channel is provided within the movable block and the horizontal plate. The connecting channel communicates with the multiple atomizing nozzles via a flexible hose. A corrugated pipe is fixedly connected to the adjacent side of the movable block and the mounting block located on the left side. The connecting channel communicates with the corrugated pipe.

[0008] Preferably, the two first rotating rods and the second rotating rod are connected by a transmission assembly, the transmission assembly including sprockets disposed on the first rotating rod and the second rotating rod, and the two sprockets are connected by a chain drive.

[0009] Preferably, the clamping assembly includes a pressure sensor mounted on a placement plate. Two fixing blocks are fixedly connected to the upper end of the placement plate. Electromagnets are embedded on the adjacent sides of the two fixing blocks. Telescopic rods are fixedly connected to the adjacent sides of the two fixing blocks. The telescopic ends of every two cooperating telescopic rods are fixedly connected to a clamping block. Each clamping block is elastically connected to the adjacent side of the corresponding fixing block through a return spring.

[0010] Preferably, a third rotating rod is rotatably connected to the adjacent sides of the two mounting blocks. The third rotating rod is provided with a second gear, and the second rotating rod is provided with a first gear. The third rotating rod is provided with two second threaded layers, and a slider is threadedly connected to each of the two second threaded layers. A strip plate is fixedly connected to the lower end of each of the two sliders. Multiple second magnetic blocks are installed on the front side of each of the two strip plates, and a first magnetic block is installed on the left side of each atomizing nozzle.

[0011] Preferably, the plurality of second magnetic blocks located on the left side are attracted to the adjacent sides of the first magnetic block by opposite charges, and the plurality of second magnetic blocks located on the right side are repelled by the adjacent sides of the first magnetic block by like charges.

[0012] To achieve the above-mentioned objectives, the present invention also provides a curing method applicable to a carbon dioxide intelligent carbonization curing system based on recycled aggregates, comprising the following steps:

[0013] S1: Raw material preparation: First, waste concrete is selected, crushed and screened efficiently to produce recycled aggregate, and then rationally proportioned to prepare porous concrete.

[0014] S2: Intelligent carbon dioxide curing: Porous concrete is placed on multiple placement plates inside the curing chamber, and carbonation curing is carried out inside the curing chamber, so that carbon dioxide reacts chemically with alkaline substances in the concrete.

[0015] S3: Electrical signals generated by the pressure sensor, temperature and humidity sensor and concentration sensor are transmitted to the intelligent control platform. The intelligent control platform controls the temperature and humidity controller, the gas pressure circulation control system and the water mist spraying system, and adjusts the carbon dioxide injection amount and temperature and humidity values ​​in a timely manner according to the preset maintenance curve.

[0016] The present invention has the following beneficial effects:

[0017] 1. Compared with existing technologies, the intelligent curing system enables carbonation curing treatment in the curing chamber. By controlling the chemical reaction between carbon dioxide and alkaline substances such as calcium hydroxide in the concrete, it not only improves the strength and durability of the concrete, but also achieves the solidification and storage of carbon dioxide in the atmosphere, and reduces energy consumption during the curing process.

[0018] 2. Compared with existing technologies, the recycled aggregate porous concrete treated by the system of this invention not only has a microenvironment suitable for plant growth, but also enhances mechanical properties and durability due to the improvement of its microstructure. At the same time, it provides a carbon sequestration solution in the construction industry for solving the problem of global climate change.

[0019] 3. Compared with existing technologies, the setting of the disc and the placement platform allows the disc to move the concrete in a circular motion during the curing process, so that the sprayed water mist can fall on every piece of concrete, thereby keeping the concrete in a better humidity state and thus keeping the concrete in a better carbonation environment.

[0020] 4. Compared with existing technologies, the setting of the first and second rotating rods can expand the spraying range of the atomizing nozzles to a certain extent, thereby enabling the humidity in the curing chamber to quickly reach the preset value, thus ensuring the curing effect on concrete. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the intelligent carbon dioxide carbonization curing system based on recycled aggregate proposed in this invention;

[0022] Figure 2 for Figure 1 Schematic diagram of the internal structure of the intermediate maintenance chamber;

[0023] Figure 3 for Figure 1 Cross-sectional view along the AA direction;

[0024] Figure 4 for Figure 3 Cross-sectional view along the BB direction;

[0025] Figure 5 for Figure 2 Enlarged structural diagram at point C;

[0026] Figure 6 for Figure 2 A magnified structural diagram at point D.

[0027] In the diagram: 1. Curing chamber body; 2. Storage tank; 3. Gas pressure circulation control system; 4. Intelligent control platform; 5. Pressure sensor; 6. Temperature and humidity sensor; 7. Concentration sensor; 8. Temperature and humidity controller; 9. Curing chamber air inlet pipe; 10. Curing chamber air return pipe; 11. Carbon dioxide air inlet pipe; 12. Pressure gauge; 13. Valve; 14. Vertical plate; 15. Drive motor; 16. First rotating rod; 17. Transmission assembly; 18. Disc; 19. Cylindrical sleeve; 20. Placement plate; 21. Pressure sensor; 22. Fixing block; 23. Electromagnet; 24. Clamping block; 25. Return spring; 26. Telescopic rod; 27. Mounting block; 28. Corrugated pipe; 29. ​​Moving block; 30. Connecting channel; 31. Horizontal plate; 32. Hose; 33. Atomizing nozzle; 34. Round rod; 35. First magnetic block; 36. Rectangular block; 37. First gear; 38. Second rotating rod; 39. Slider; 40. Strip plate; 41. Second magnetic block; 42. Second gear; 43. Third rotating rod. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0029] Reference Figures 1-6The intelligent carbon dioxide carbonization curing system based on recycled aggregate includes a curing chamber body 1, a storage tank 2, an intelligent control platform 4, a gas pressure circulation control system 3, a ventilation system, a data acquisition and control system, and a safety protection system. The ventilation system, after curing, uses an intelligent exhaust device to remove excess carbon dioxide and introduce fresh air, ensuring safe entry for personnel. The data acquisition and control system integrates IoT technology and artificial intelligence algorithms to monitor and record various parameters within the curing chamber in real time, including but not limited to changes in carbon dioxide concentration, temperature, and humidity, and automatically adjusts equipment operation based on a preset curing curve. The safety protection system... The system includes a carbon dioxide leak alarm system that automatically triggers an alarm and activates the ventilation system to eliminate the hazard when the indoor carbon dioxide concentration is too high. It is also equipped with a fire extinguishing system to ensure the safe operation of the curing room. A sliding door is located on the front of the curing chamber 1, and when closed, the interior of the curing chamber 1 is sealed. A monitoring module is located on the right side of the curing chamber 1, including a pressure sensor 5, a temperature and humidity sensor 6, and a concentration sensor 7. The concentration sensor 7 monitors the carbon dioxide concentration inside the curing chamber 1. A temperature and humidity controller 8 is installed at the top of the curing chamber 1. The gas pressure circulation control system 3 includes an air pump... The pump and storage tank 2 are connected via a carbon dioxide inlet pipe 11. The pump and the top space of the curing chamber body 1 are connected via a curing chamber inlet pipe 9. The pump and the bottom space of the curing chamber body 1 are connected via a curing chamber return air pipe 10. Valves 13 are installed on the curing chamber inlet pipe 9, the carbon dioxide inlet pipe 11, and the curing chamber return air pipe 10. The valves 13 are automatically controlled by the intelligent control platform 4. A pressure gauge 12 is installed on the storage tank 2. The curing chamber body 1 is equipped with a placement component and a water mist spraying system. The placement component includes two vertical plates 14 installed inside the curing chamber body 1. A first rotating rod 16 is rotatably connected through each of the two vertical plates 14. The adjacent sides of the two first rotating rods 16 are fixed. A disc 18 is fixedly connected to each other. Multiple short rods are fixedly connected to the adjacent sides of the two discs 18. A cylindrical sleeve 19 is fitted on each short rod. A connecting rod is fixedly connected to the lower end of each cylindrical sleeve 19. The lower ends of every two cooperating connecting rods are fixedly connected to a placement plate 20. This ensures that during curing, the concrete is always positioned above the placement plate 20 due to the gravity of the concrete (i.e., the placement plate 20 remains horizontal during rotation). Multiple clamping components are provided at the upper end of each placement plate 20. A drive motor 15 is installed on the vertical plate 14 on the left side. The output shaft of the drive motor 15 is fixedly connected to the first rotating rod 16 on the left side.

[0030] The water mist spraying system includes two mounting blocks 27 located at the top of the curing chamber body 1. A second rotating rod 38 is rotatably connected to the adjacent sides of the two mounting blocks 27. The second rotating rod 38 has a first threaded layer, similar to a reciprocating screw thread. A moving block 29 is threaded onto the first threaded layer. A horizontal plate 31 is fixedly connected to the lower end of the moving block 29. Two rectangular blocks 36 are fixedly connected to the lower end of the horizontal plate 31. A round rod 34 is fixedly connected to the adjacent sides of the two rectangular blocks 36. Multiple atomizing nozzles 33 are sleeved on the round rod 34. The moving block 29 and the horizontal plate 31 together have... The connecting channel 30 is connected to multiple atomizing nozzles 33 via hoses 32. The movable block 29 and the adjacent side of the mounting block 27 on the left are fixedly connected to a bellows 28. In actual operation, an external water pump and a vertical shaft are installed. The inlet end of the water pump is connected to the water tank, and the outlet end of the water pump needs to be connected to the right side of the bellows 28. The connecting channel 30 is connected to the bellows 28. The two first rotating rods 16 and the second rotating rod 38 are connected by a transmission assembly 17. The transmission assembly 17 includes sprockets set on the first rotating rods 16 and the second rotating rods 38. The two sprockets are connected by a chain drive.

[0031] The clamping assembly includes a pressure sensor 21 mounted on a placement plate 20. Two fixing blocks 22 are fixedly connected to the upper end of the placement plate 20. Electromagnets 23 are embedded on the adjacent sides of the two fixing blocks 22. Telescopic rods 26 are fixedly connected to the adjacent sides of the two fixing blocks 22. The telescopic ends of each pair of cooperating telescopic rods 26 are fixedly connected to a clamping block 24. Each clamping block 24 is elastically connected to the adjacent side of the corresponding fixing block 22 through a return spring 25. The pressure sensor 21 generates an electrical signal to the intelligent control platform 4. The intelligent control platform 4 controls the two corresponding electromagnets 23 to be energized. After each electromagnet 23 is energized, it will generate a repulsive force on the corresponding clamping block 24. Each clamping block 24 is made of magnetic material.

[0032] The two mounting blocks 27 are rotatably connected to a third rotating rod 43 on their adjacent sides. The third rotating rod 43 is equipped with a second gear 42, and the second rotating rod 38 is equipped with a first gear 37. The third rotating rod 43 is equipped with two second threaded layers, which are similar to the threaded layers of a reciprocating screw. When the third rotating rod 43 rotates, the two sliders 39 move relative to each other or away from each other. The two second threaded layers are threaded with sliders 39. The lower ends of the two sliders 39 are fixedly connected to strip plates 40. Multiple second magnetic blocks 41 are installed on the front side of the two strip plates 40. A first magnetic block 35 is installed on the left side of each atomizing nozzle 33. The multiple second magnetic blocks 41 on the left side are attracted to the adjacent sides of the first magnetic block 35 with opposite polarities, while the multiple second magnetic blocks 41 on the right side are repelled by the adjacent sides of the first magnetic block 35 with the same polarities.

[0033] This invention also provides a curing method applicable to a carbon dioxide intelligent carbonization curing system based on recycled aggregates, comprising the following steps:

[0034] S1: Raw material preparation: First, waste concrete is selected and processed into recycled aggregate through efficient crushing and screening. The recycled aggregate is then rationally proportioned to prepare porous concrete. By optimizing the pore structure to meet the needs of vegetation, and by controlling the aggregate gradation, cement type and dosage, water-cement ratio and the addition of other mineral admixtures, the alkaline environment of the porous concrete is reduced, which is conducive to the planting of alkali-tolerant plants.

[0035] 1) Waste concrete is selected, efficiently crushed, and screened to produce recycled aggregate, which is then rationally proportioned to prepare porous concrete. The pore structure is optimized to meet the needs of vegetation. The composition includes 15-25 parts cement, 70-80 parts recycled aggregate, 5-10 parts vegetation matrix, 5-15 parts active admixture, 10-20 parts water, and 0.5-1 parts admixture. The recycled aggregate has a single-grade particle size of 20-30 mm. Ordinary Portland cement or slag cement with good durability and activity is selected as the cement. The active admixture is one or two of slag and fly ash, which are used to improve the interfacial properties between recycled aggregate and cement. The vegetation matrix uses lightweight porous materials such as ceramsite and vermiculite to provide space for plant growth. The admixture uses polycarboxylate superplasticizer and hydroxypropyl methylcellulose thickener to optimize the workability and pore structure of the porous concrete.

[0036] 2) Test the water absorption rate of recycled aggregate, calculate the amount of water required for the recycled aggregate to reach saturated surface-dry state, weigh the corresponding recycled aggregate and the required amount of water for saturated surface-dry state, and spray this portion of water onto the recycled aggregate using a spraying device while stirring. After spraying, let it stand for 20-30 minutes and then remove it for later use. Then, weigh the cement, active admixture, vegetation matrix, mixing water, and additives according to the mix proportion. Dry mix the powder evenly, then add 70% of the mixing water and stir to form a slurry. Then, add the water-absorbing recycled aggregate in the saturated surface-dry state and the remaining 30% of the water to the mixer and stir evenly. Then, pour the mixture into the mold in three layers, and tamp each layer evenly with a tamping rod to prepare standard specimens. After 24 hours, remove the mold and move the blank group and the carbon dioxide curing group into the standard curing room and the carbon dioxide intelligent curing room for curing, respectively. After curing for 28 days, test their apparent density, porosity, pH value, and compressive strength.

[0037] S2: Intelligent carbon dioxide curing: Porous concrete is placed on multiple placement plates 20 inside the curing chamber 1, and carbonation curing is carried out in the curing chamber. This allows carbon dioxide to react chemically with alkaline substances such as calcium hydroxide in the concrete, which not only improves the strength and durability of the concrete, but also achieves the solidification and storage of carbon dioxide in the atmosphere.

[0038] S3: The electrical signals generated by the air pressure sensor 5, temperature and humidity sensor 6 and concentration sensor 7 are transmitted to the intelligent control platform 4. The intelligent control platform 4 controls the temperature and humidity controller 8, the gas pressure circulation control system 3 and the water mist spraying system. According to the pre-set curing curve, the carbon dioxide injection amount and temperature and humidity values ​​are adjusted in a timely manner to ensure that the concrete undergoes carbonation reaction under the best conditions, while ensuring that the curing process is environmentally friendly and reduces energy consumption.

[0039] The functional principle of this invention can be explained by the following operation: Select waste concrete and prepare porous concrete after crushing and other treatments. Open the sliding door on the curing chamber body 1, load the porous concrete into the test mold, and then place multiple test molds on multiple placement plates 20 in sequence. Close the sliding door. At this time, the carbon dioxide concentration, temperature and humidity in the curing chamber body 1 are controlled by the temperature and humidity controller 8, the water mist spraying system and the gas pressure circulation control system 3.

[0040] When the test mold is placed on the placement plate 20, the pressure sensor 21 is squeezed due to the gravity of the test mold and the concrete, generating an electrical signal. The electrical signal is transmitted to the intelligent control platform 4, which controls the two corresponding electromagnets 23 to be energized. This causes the electromagnets 23 to exert a repulsive force on the corresponding clamping blocks 24, thereby causing the two corresponding clamping blocks 24 to move relative to each other and clamp the test mold. This ensures that the test mold can be stably placed on the placement plate 20 when the drive motor 15 is running.

[0041] When the carbon dioxide concentration, temperature and humidity inside the curing chamber 1 reach the preset values, the pressure sensor 5, temperature and humidity sensor 6 and concentration sensor 7 will generate electrical signals and transmit them to the intelligent control platform 4. The intelligent control platform 4 will then control the water mist spraying system and the gas pressure circulation control system 3 to stop operating. When the humidity inside the curing chamber 1 is low, the temperature and humidity sensor 6 will generate electrical signals and transmit them to the intelligent control platform 4. The intelligent control platform 4 will then control the drive motor 15 and the water pump to operate through the temperature and humidity controller 8.

[0042] The operation of the drive motor 15 drives the two disks 18 to rotate through the two first rotating rods 16, thereby causing the multiple placement plates 20 to make circular motion. Since the multiple cylindrical sleeves 19 are fitted on the short rods, the test mold is always positioned above the placement plate 20 under the gravity of the test mold and the concrete. During the rotation of the first rotating rod 16, the second rotating rod 38 is driven to rotate through the transmission component 17, thereby causing the moving block 29 to drive the multiple atomizing nozzles 33 to move left and right continuously. At this time, the water pump will draw water out of the water tank and then atomize and spray it out through the multiple atomizing nozzles 33 to humidify the curing chamber body 1. Thus, during the left and right movement of the multiple atomizing nozzles 33, the water mist can be evenly sprayed inside the curing chamber body 1.

[0043] During the rotation of the second rotating rod 38, the first gear 37 and the second gear 42 are in a meshing state, which causes the two sliders 39 to move continuously relative to each other and away from each other.

[0044] During the movement of the two sliders 39, the first magnetic block 35 and the second magnetic block 41 will continuously move closer and further away from each other. When multiple first magnetic blocks 35 approach the second magnetic block 41 located on the left, the adjacent surfaces of the first magnetic block 35 and the second magnetic block 41 are attracted by opposite polarities, causing multiple atomizing nozzles 33 to rotate backward. When multiple first magnetic blocks 35 move away from the second magnetic block 41 located on the left, under the action of the gravity of the atomizing nozzles 33, the multiple atomizing nozzles 33 will rotate forward to a vertical state.

[0045] When multiple first magnetic blocks 35 approach the second magnetic block 41 located on the right, the adjacent surfaces of the first magnetic blocks 35 and the second magnetic block 41 repel each other due to their similarity, causing multiple atomizing nozzles 33 to rotate forward. When multiple first magnetic blocks 35 move away from the second magnetic block 41 located on the right, under the action of their own gravity, the multiple atomizing nozzles 33 rotate backward to a vertical state, thereby causing the atomizing nozzles 33 to swing back and forth, increasing the spray range of water mist, and further accelerating the humidity inside the curing chamber 1 to reach the preset value, thus ensuring that carbonation curing treatment can be carried out stably in the concrete and improving the carbonation curing effect of the concrete.

[0046] It is worth mentioning that, since the radius of the first gear 37 is larger than the radius of the second gear 42, the position of the first magnetic block 35 aligned with the second magnetic block 41 is not fixed, which in turn causes the position of the multiple atomizing nozzles 33 to be different each time they swing.

[0047] When the humidity reaches the preset value, the temperature and humidity sensor 6 generates an electrical signal and transmits it to the intelligent control platform 4. The intelligent control platform 4 then controls the drive motor 15 and the water pump to stop running through the temperature and humidity controller 8.

[0048] The above are merely preferred embodiments 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. A carbon dioxide intelligent carbonization curing system based on recycled aggregate, comprising a curing chamber body (1), a storage tank (2), an intelligent control platform (4), a gas pressure circulation control system (3), a ventilation system, a data acquisition and control system, and a safety protection system, characterized in that: A monitoring module is provided on the right side of the maintenance chamber body (1). The monitoring module includes a pressure sensor (5), a temperature and humidity sensor (6), and a concentration sensor (7) installed on the right side of the maintenance chamber body (1). A temperature and humidity controller (8) is installed on the upper end of the maintenance chamber body (1). The gas pressure circulation control system (3) includes an air pump. The air pump is connected to the storage tank (2) through a carbon dioxide inlet pipe (11). The air pump is connected to the top space of the maintenance chamber body (1) through a maintenance chamber inlet pipe (9). The air pump is connected to the bottom space of the maintenance chamber body (1) through a maintenance chamber return air pipe (10). Valves (13) are provided on the maintenance chamber inlet pipe (9), the carbon dioxide inlet pipe (11), and the maintenance chamber return air pipe (10). A pressure gauge (12) is installed on the storage tank (2). The maintenance chamber body (1) is equipped with a placement component and a water mist spraying system. The placement assembly includes two vertical plates (14) disposed inside the maintenance chamber body (1). A first rotating rod (16) is rotatably connected through each of the two vertical plates (14). A disc (18) is fixedly connected to the adjacent sides of the two first rotating rods (16). A plurality of short rods are fixedly connected to the adjacent sides of the two discs (18). A cylindrical sleeve (19) is fitted on each short rod. A connecting rod is fixedly connected to the lower end of each cylindrical sleeve (19). A placement plate (20) is fixedly connected to the lower end of every two cooperating connecting rods. A plurality of clamping assemblies are provided at the upper end of each placement plate (20). A drive motor (15) is installed on the vertical plate (14) located on the left side. The output shaft end of the drive motor (15) is fixedly connected to the first rotating rod (16) located on the left side. The water mist spraying system includes two mounting blocks (27) set at the top inside the maintenance chamber body (1). The adjacent sides of the two mounting blocks (27) are rotatably connected to a second rotating rod (38). The second rotating rod (38) is provided with a first threaded layer. A moving block (29) is threadedly connected to the first threaded layer. A horizontal plate (31) is fixedly connected to the lower end of the moving block (29). Two rectangular blocks (36) are fixedly connected to the lower end of the horizontal plate (31). A round rod (34) is fixedly connected to the adjacent sides of the two rectangular blocks (36). Multiple atomizing nozzles (33) are sleeved on the round rod (34). A connecting channel (30) is provided in both the moving block (29) and the horizontal plate (31). The connecting channel (30) is connected to the multiple atomizing nozzles (33) through a hose (32). A corrugated pipe (28) is fixedly connected to the adjacent side of the mounting block (27) located on the left side. The connecting channel (30) is connected to the corrugated pipe (28). The two mounting blocks (27) are rotatably connected to a third rotating rod (43) on adjacent sides. The third rotating rod (43) is provided with a second gear (42), and the second rotating rod (38) is provided with a first gear (37). The third rotating rod (43) is provided with two second threaded layers. The two second threaded layers are threaded with sliders (39). The lower ends of the two sliders (39) are fixedly connected with strip plates (40). The front sides of the two strip plates (40) are each equipped with multiple second magnetic blocks (41). The left side of each atomizing nozzle (33) is equipped with a first magnetic block (35). The second magnetic blocks (41) on the left side are attracted to the adjacent sides of the first magnetic block (35) by opposite polarities, while the second magnetic blocks (41) on the right side are repelled by the adjacent sides of the first magnetic block (35) by the same polarities.

2. The intelligent carbon dioxide carbonization curing system based on recycled aggregate according to claim 1, characterized in that: The two first rotating rods (16) and the second rotating rod (38) are connected by a transmission assembly (17). The transmission assembly (17) includes sprockets on the first rotating rod (16) and the second rotating rod (38), and the two sprockets are connected by a chain drive.

3. The intelligent carbon dioxide carbonization curing system based on recycled aggregate according to claim 1, characterized in that: The clamping assembly includes a pressure sensor (21) mounted on a placement plate (20). Two fixing blocks (22) are fixedly connected to the upper end of the placement plate (20). Electromagnets (23) are embedded on the adjacent sides of the two fixing blocks (22). Telescopic rods (26) are fixedly connected to the adjacent sides of the two fixing blocks (22). The telescopic ends of each pair of cooperating telescopic rods (26) are fixedly connected to a clamping block (24). Each clamping block (24) is elastically connected to the adjacent side of the corresponding fixing block (22) by a return spring (25).

4. A curing method applicable to the carbon dioxide intelligent carbonization curing system based on recycled aggregate as described in any one of claims 1-3, characterized in that, Includes the following steps: S1: Raw material preparation: First, waste concrete is selected, crushed and screened efficiently to produce recycled aggregate, and then rationally proportioned to prepare porous concrete. S2: Carbon dioxide intelligent curing: Porous concrete is placed on multiple placement plates (20) inside the curing chamber body (1) and carbonation curing is carried out inside the curing chamber body (1), so that carbon dioxide reacts chemically with alkaline substances in the concrete. S3: The electrical signals generated by the air pressure sensor (5), temperature and humidity sensor (6) and concentration sensor (7) are transmitted to the intelligent control platform (4). The intelligent control platform (4) controls the temperature and humidity controller (8), the gas pressure circulation control system (3) and the water mist spraying system, and adjusts the carbon dioxide injection amount and temperature and humidity values ​​in a timely manner according to the preset maintenance curve.

Images