Recycled aggregate high-calcium-supplement carbonization device and carbonization method thereof

Abstract

The invention discloses a recycled aggregate high-calcium-supplement carbonization device and a carbonization method thereof, and relates to the technical field of recycled aggregate reinforcement treatment. The recycled aggregate high-calcium-supplement carbonization device comprises a reactor, a vacuumizing assembly, a liquid supply assembly and a gas supply assembly, the reactor is provided with a reaction cavity used for containing aggregate, the vacuumizing assembly comprises an exhaust pipe connected with the reactor, the liquid supply assembly comprises a liquid inlet pipe and a liquid outlet pipe which are connected with the reactor, and the gas supply assembly comprises a gas inlet pipe and a gas outlet pipe which are connected with the reactor. The liquid inlet pipe is used for conveying a calcium hydroxide solution to the reaction cavity in the negative pressure state, the gas supply assembly comprises a gas inlet pipe and an exhaust pipe which are connected with the reactor, and the gas inlet pipe is used for conveying carbon dioxide gas to the reaction cavity. According to the recycled aggregate high-calcium-supplement carbonization device, permeation of a calcium hydroxide solution to recycled aggregate micro-cracks and micro-defect gaps can be effectively promoted, it is guaranteed that carbonization products repair the micro-cracks and the micro-defects, and the carbonization modification effect on the recycled aggregate is enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of recycled aggregate strengthening treatment, and in particular to a recycled aggregate high-calcium supplementation carbonization device and a carbonization method thereof. Background Art

[0002] Recycled aggregate is made from waste concrete after crushing and processing. Recycled aggregate contains residual slurry, which leads to large porosity, high water absorption, low bulk density, high crushing index value, and weak bonding with the concrete matrix, which restricts the recycling rate of recycled aggregate.

[0003] In the related art, the recycled aggregate is strengthened by carbonization modification. The residual calcium hydroxide, calcium silicate hydrate, etc. in the recycled aggregate can react with carbon dioxide to generate calcium carbonate precipitation, consume the residual slurry of the recycled aggregate and fill and repair micro-defects. At the same time, calcium hydroxide pre-soaking can add additional reactants to the carbonization reaction of the recycled aggregate, increase the amount of calcium carbonate generated, and strengthen the recycled aggregate more effectively. However, the micro-cracks and micro-defects of the recycled aggregate are small, which affects the penetration of calcium hydroxide, and there may be deposited impurities that further hinder the penetration of calcium hydroxide, resulting in insufficient repair of micro-defects by carbonization products, thereby limiting the strengthening effect of carbonization modification of recycled aggregate. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, an embodiment of the present invention proposes a recycled aggregate high calcium supplement carbonization device, which can effectively promote the penetration of calcium hydroxide solution into microcracks and micro-defect voids in the recycled aggregate, achieve effective supplementation of the calcium source, ensure the repair of microcracks and micro-defects by carbonization products, and enhance the carbonization modification effect on the recycled aggregate.

[0006] The embodiment of the present invention also provides a carbonization method of recycled aggregate.

[0007] The recycled aggregate high calcium supplementation carbonization device according to the embodiment of the present invention comprises:

[0008] A reactor having a reaction chamber for accommodating aggregate;

[0009] A vacuum pumping assembly, the vacuum pumping assembly comprising a vacuum pipe, the vacuum pipe is connected to the reactor and is used to perform a vacuum operation on the reaction chamber;

[0010] A liquid supply component, the liquid supply component comprising a liquid inlet pipe and a liquid discharge pipe connected to the reactor, the liquid inlet pipe is used to transport the calcium hydroxide solution to the reaction chamber in a negative pressure state, and the liquid discharge pipe is used to discharge the calcium hydroxide solution in the reaction chamber;

[0011] A gas supply component, the gas supply component includes an air inlet pipe and an exhaust pipe connected to the reactor, the air inlet pipe is used to transport carbon dioxide gas to the reaction chamber, and the exhaust pipe is used to exhaust the gas in the reaction chamber.

[0012] The high calcium supplementation carbonization device for recycled aggregates of the embodiment of the present invention can effectively promote the penetration of calcium hydroxide solution into microcracks and microdefect voids of recycled aggregates, achieve effective supplementation of calcium sources, ensure the repair of microcracks and microdefects by carbonization products, and enhance the carbonization modification effect on recycled aggregates.

[0013] In some embodiments, a stirring assembly is included, and the stirring assembly includes a stirring shaft and stirring blades. The stirring shaft is rotatably arranged on the reactor, and the stirring blades are fixed on the stirring shaft. The stirring blades are used to stir the aggregate in the reaction chamber.

[0014] In some embodiments, a filter plate is included, which is fixed to the reactor and has a set distance from the bottom of the reactor. The filter plate is arranged on the side of the stirring blade close to the bottom of the reactor, and the filter plate is used to support aggregate and allow calcium hydroxide solution to pass through.

[0015] In some embodiments, a plurality of storage layers are spaced apart in the vertical direction in the reaction chamber, the plurality of storage layers are used to store aggregates respectively, and the storage layer at the top of the plurality of storage layers is located below the connection position between the liquid inlet pipe and the reactor.

[0016] In some embodiments, the storage layer includes a support portion fixedly connected to the side wall of the reactor and a storage tray detachably assembled on the support portion, the storage tray is used to store aggregates, and the storage tray is provided with a perforation for allowing the calcium hydroxide solution to pass through.

[0017] In some embodiments, it includes a controller, a temperature and humidity sensor, a temperature and humidity control unit and a carbon dioxide sensor, the controller is electrically connected to the temperature and humidity sensor, the temperature and humidity control unit and the carbon dioxide sensor respectively, the temperature and humidity sensor is arranged in the reaction chamber to monitor the temperature and humidity in the reaction chamber, the temperature and humidity control unit is arranged in the reactor and is used to adjust the temperature and humidity in the reaction chamber, and the carbon dioxide sensor is arranged in the reactor to monitor the concentration of carbon dioxide gas in the reaction chamber.

[0018] The carbonization method of the recycled aggregate in the embodiment of the present invention comprises the recycled aggregate high calcium supplementation carbonization device in any of the above embodiments, and the carbonization method comprises the following steps:

[0019] S1: placing aggregate in a reaction chamber and evacuating the reaction chamber through a vacuum pipe;

[0020] S2: When the pressure in the reaction chamber reaches the set value, the air extraction pipe is closed, and the calcium hydroxide solution is transported into the reaction chamber through the liquid inlet pipe;

[0021] S3: When the calcium hydroxide solution covers the aggregate, close the liquid inlet pipe and soak the aggregate in the calcium hydroxide solution for a set time;

[0022] S4: Open the exhaust pipe to make the pressure in the reaction chamber the same as the atmospheric pressure, and discharge the calcium hydroxide solution in the reaction chamber through the drain pipe, and finally close the exhaust pipe and the drain pipe;

[0023] S5: Carbon dioxide gas is delivered to the reaction chamber through the gas delivery pipe to maintain the carbon dioxide concentration in the reaction chamber at a target value, thereby achieving carbonization treatment of the aggregate.

[0024] In some embodiments, a stirring component is included. In step S3, the aggregate is slowly stirred by the stirring component while being soaked. In step S5, when the carbon dioxide concentration is maintained at a target value, the aggregate is slowly stirred by the stirring component.

[0025] In some embodiments, in step S3, after closing the liquid inlet pipe, the vacuum pipe is opened to evacuate the reaction chamber again, so that the pressure in the reaction chamber returns to the set value.

[0026] In some embodiments, a temperature and humidity sensor and a temperature and humidity control unit are included. In step S5, while maintaining the carbon dioxide concentration, the temperature and humidity in the reaction chamber are adjusted by the temperature and humidity sensor and the temperature and humidity control unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of a recycled aggregate high calcium supplementation carbonization device according to an embodiment of the present invention.

[0028] Figure 2 It is a cross-sectional view of a reactor in a recycled aggregate high calcium supplementation carbonization device according to an embodiment of the present invention.

[0029] Figure 3 It is a cross-sectional view of a reactor in a recycled aggregate high calcium supplementation carbonization device according to another embodiment of the present invention.

[0030] Figure 4 It is a schematic structural diagram of a storage tray in a recycled aggregate high calcium supplementation carbonization device according to another embodiment of the present invention.

[0031] Reference numerals:

[0032] Reactor 1; reaction chamber 11; pressure monitoring unit 12; filter plate 13; material storage layer 14; support portion 141; material storage tray 142; tray body 1421; connection portion 1422; traction portion 1423;

[0033] Vacuum pump 2; vacuum pump 21; vacuum pipe 22; first valve 23;

[0034] Liquid supply assembly 3; liquid storage tank 31; liquid inlet pipe 32; recovery tank 33; liquid discharge pipe 34; second valve 35; third valve 36;

[0035] Air supply assembly 4; air storage tank 41; air inlet pipe 42; exhaust pipe 43; fourth valve 44; fifth valve 45;

[0036] Stirring assembly 5; stirring motor 51; stirring shaft 52; stirring fan blade 53;

[0037] Frame 6; controller 7; temperature and humidity sensor 8; temperature and humidity control unit 9; carbon dioxide sensor 10. DETAILED DESCRIPTION

[0038] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0039] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the recycled aggregate high calcium supplement carbonization device according to the embodiment of the present invention comprises a reactor 1, a vacuum pumping component 2, a liquid supply component 3 and a gas supply component 4, wherein the height direction of the reactor 1 is defined as the up and down direction.

[0040] The reactor 1 has a reaction chamber 11 for accommodating aggregates, and a pressure monitoring unit 12 is provided on the reactor 1. The pressure monitoring unit 12 can be a pressure gauge or a pressure sensor. The pressure monitoring unit 12 is used to monitor the gas pressure in the reaction chamber 11.

[0041] The vacuum pump assembly 2 includes a vacuum pump 21 and an exhaust pipe 22. The exhaust pipe 22 is connected between the vacuum pump 21 and the reactor 1, and a first valve 23 is provided on the exhaust pipe 22. The first valve 23 is used to control the opening and closing of the exhaust pipe 22. The exhaust pipe 22 is used to perform vacuum operation on the reaction chamber 11 under the action of the vacuum pump 21 to create a negative pressure environment in the reaction chamber 11.

[0042] The liquid supply assembly 3 includes a liquid storage tank 31, a liquid inlet pipe 32, a recovery tank 33 and a liquid discharge pipe 34. The liquid storage tank 31 stores calcium hydroxide solution. The liquid inlet pipe 32 connects the liquid storage tank 31 and the reactor 1. A second valve 35 is provided on the liquid inlet pipe 32. By opening the second valve 35, the calcium hydroxide solution can be transported to the reaction chamber 11 in a negative pressure state. The liquid discharge pipe 34 is connected between the reactor 1 and the recovery tank 33. A third valve 36 for opening and closing the liquid discharge pipe 34 is provided on the liquid discharge pipe 34. The liquid discharge pipe 34 is used to transport the calcium hydroxide solution discharged from the reaction chamber 11 to the recovery tank 33.

[0043] The gas supply assembly 4 includes a gas storage tank 41, an air inlet pipe 42 and an exhaust pipe 43. The gas storage tank 41 stores carbon dioxide gas. The air inlet pipe 42 is connected between the gas storage tank 41 and the reactor 1. A fourth valve 44 is provided on the air inlet pipe 42. The air inlet pipe 42 is used to transport carbon dioxide gas into the reaction chamber 11. The exhaust pipe 43 is connected to the reactor 1 and is used to discharge the gas in the reaction chamber 11. The exhaust pipe 43 is provided with a fifth valve 45.

[0044] When the recycled aggregate high calcium supplement carbonization device of the embodiment of the present invention is in use, the aggregate is placed in the reaction chamber 11, and the reaction chamber 11 is evacuated through the exhaust pipe 22. During the evacuation of the reaction chamber 11, the air pressure outside the aggregate is lower than the pressure inside the microcracks and microdefects, thereby forming a pressure difference to suck out the impurities and air in the microcracks and microdefects. The reading of the pressure monitoring unit 12 is observed. When the reading is -0.1MPa, the exhaust pipe 22 is closed, the liquid inlet pipe 32 is opened, and the calcium hydroxide solution is transported into the reaction chamber 11 under a negative pressure environment. When the calcium hydroxide solution is in the reactor 1 and has submerged the aggregate, the liquid inlet pipe 32 is closed, and the negative pressure is used to absorb the impurities and air in the microcracks and microdefects. The environment overcomes the surface tension of the liquid, allowing the calcium oxide solution to fully enter the microcracks and microdefects of the aggregate. After soaking for a set time, the exhaust pipe 43 is opened to make the pressure in the reaction chamber 11 the same as the atmospheric pressure, and the calcium hydroxide solution in the reaction chamber 11 is discharged through the drain pipe 34. After the aggregate reaches a saturated surface dry state, the exhaust pipe 43 and the drain pipe 34 are closed, and carbon dioxide gas is transported into the reaction chamber 11 through the air inlet pipe 42 to maintain the carbon dioxide concentration in the reaction chamber 11 at a target value. Calcium hydroxide undergoes a carbonization reaction with carbon dioxide in the microcracks and microdefects to generate a carbonization product, thereby densifying the microcracks and microdefects, thereby achieving carbonization treatment of the recycled aggregate.

[0045] The high calcium supplement carbonization device for recycled aggregates in the embodiment of the present invention realizes the suction of impurities and air existing in microcracks and microdefects through a negative pressure environment, and realizes the penetration of calcium hydroxide solution into the microcracks and microdefects based on the principle of vacuum saturation under a negative pressure environment. After the carbonization reaction, the carbonization products in the microcracks and microdefects are effectively supplemented, ensuring that the carbonization products repair the microcracks and microdefects after the carbonization operation, thereby enhancing the carbonization modification effect on the recycled aggregates.

[0046] Optionally, the top or side wall of the reactor 1 is provided with an openable and closable end cover to facilitate the taking and placing of aggregates.

[0047] In some embodiments, Figure 2 As shown, it includes a stirring component 5, which includes a stirring shaft 52 and stirring blades 53. The stirring shaft 52 is rotatably arranged on the reactor 1, and the stirring blades 53 are fixedly arranged on the stirring shaft 52. The stirring blades 53 are used to stir the aggregate in the reaction chamber 11.

[0048] Specifically, the stirring assembly 5 includes a stirring motor 51, a stirring shaft 52 and a stirring blade 53. The stirring motor 51 is fixedly arranged at the bottom of the reactor 1, and the output shaft of the stirring unit extends into the reaction chamber 11. The stirring shaft 52 is fixed and coaxially arranged on the output shaft of the stirring motor 51. The stirring blade 53 is arranged on the stirring shaft 52. A frame 6 is provided at the bottom of the reactor 1. The frame 6 is used to accommodate the stirring motor 51 and support the stirring motor 51 to a set height. The stirring blade 53 is driven to rotate by the rotation of the stirring motor 51, thereby achieving the stirring of the aggregate, ensuring the penetration of the calcium hydroxide solution into microcracks and microdefects, and ensuring the carbonization strengthening effect on the aggregate.

[0049] In some embodiments, Figure 2 As shown, it includes a filter plate 13, which is fixed to the reactor 1 and has a set distance from the bottom of the reactor 1. The filter plate 13 is arranged on one side of the stirring blade 53 close to the bottom of the reactor 1. The filter plate 13 is used to support aggregate and allow calcium hydroxide solution to pass through.

[0050] By setting the filter plate 13, a liquid collecting cavity is limited between the filter plate 13 and the bottom of the reactor 1, so that the calcium hydroxide solution can be discharged after the aggregate is immersed in the calcium hydroxide solution, and the blockage of the position where the discharge pipe 34 is connected to the reactor 1 by the aggregate is avoided. At the same time, the drainage speed is increased, so that a saturated surface dry state in which there is solution in the pores and cracks inside the aggregate and there is no excess solution on the surface is achieved, so that the aggregate can be carbonized and strengthened.

[0051] In some embodiments, Figure 3 As shown, a plurality of storage layers 14 are arranged in the reaction chamber 11 at intervals along the up and down directions. The plurality of storage layers 14 are used to store aggregates respectively, and the storage layer 14 located at the top of the plurality of storage layers 14 is located below the connection position between the liquid inlet pipe 32 and the reactor 1.

[0052] By setting up multiple storage layers 14, the overall amount of aggregate that can be accommodated in the reactor 1 can be guaranteed on the basis of limiting the thickness of the aggregate in each storage layer 14. While ensuring the carbonization strengthening effect on the aggregate, the carbonization strengthening amount of the aggregate per unit time is increased, thereby improving the carbonization efficiency of the aggregate.

[0053] In some embodiments, Figure 3 and Figure 4 As shown, the storage layer 14 includes a support portion 141 fixedly connected to the side wall of the reactor 1 and a storage tray 142 detachably assembled on the support portion 141. The storage tray 142 is used to store aggregates, and the storage tray 142 is provided with a through hole for the calcium hydroxide solution to pass through.

[0054] Specifically, the reactor 1 is a barrel-shaped structure, and the support part 141 is a plurality of support plates arranged on the inner wall of the reactor 1. The gap between two adjacent support plates is larger than the circumferential size of the support plates in the reactor 1, so as to facilitate the movement and installation of the storage tray 142 between the multiple layers of support plates. The storage tray 142 includes a tray body 1421 and a connecting part 1422 arranged on the circumferential side of the tray body 1421 corresponding to the support plate. The tray body 1421 is a groove-shaped structure, and the tray body 1421 is provided with a through hole for the solution to pass through. The connecting part 1422 is used to be detachably matched with the support plate. The tray body 1421 is provided with a traction part 1423 for moving and lifting. The traction part 1423 includes a connecting rod arranged on the tray body 1421 and a connecting ring arranged on the connecting rod.

[0055] Optionally, a plug-in hole is provided on the support plate, and the connecting portion 1422 includes an insert rod fixedly connected to the disk body 1421, and the insert rod is plugged into the plug-in hole.

[0056] In some embodiments, Figure 1 , Figure 2 and Figure 3 As shown, it includes a controller 7, a temperature and humidity sensor 8, a temperature and humidity control unit 9 and a carbon dioxide sensor 10. The controller 7 is electrically connected to the temperature and humidity sensor 8, the temperature and humidity control unit 9 and the carbon dioxide sensor 10 respectively. The temperature and humidity sensor 8 is arranged in the reaction chamber 11 to monitor the temperature and humidity in the reaction chamber 11. The temperature and humidity control unit 9 is arranged in the reactor 1 and is used to adjust the temperature and humidity in the reaction chamber 11. The carbon dioxide sensor 10 is arranged in the reactor 1 to monitor the concentration of carbon dioxide gas in the reaction chamber 11.

[0057] The temperature and humidity sensor 8 and the carbon dioxide sensor 10 are provided to facilitate adjustment of the temperature, humidity and carbon dioxide concentration in the reaction chamber 11, thereby ensuring the environmental conditions for aggregate carbonization and the carbonization strengthening effect on the aggregate.

[0058] It should be noted that the temperature and humidity control unit 9 includes a temperature adjustment module and a humidity adjustment module. The temperature adjustment module is used to heat or cool the reaction chamber 11 to achieve temperature adjustment, and the humidity adjustment module is used to humidify or dehumidify the reaction chamber 11 to achieve humidity adjustment in the reaction chamber 11.

[0059] The following describes a method for carbonizing recycled aggregate according to an embodiment of the present invention.

[0060] The carbonization method of the recycled aggregate in the embodiment of the present invention comprises the recycled aggregate high calcium supplementation carbonization device in any of the above embodiments, and the carbonization method comprises the following steps:

[0061] S1: placing aggregate in the reaction chamber 11, and evacuating the reaction chamber 11 through the exhaust pipe 22;

[0062] S2: When the pressure in the reaction chamber 11 reaches a set value, the air extraction pipe 22 is closed, and the calcium hydroxide solution is transported into the reaction chamber 11 through the liquid inlet pipe 32;

[0063] S3: When the calcium hydroxide solution covers the aggregate, the liquid inlet pipe 32 is closed, and the aggregate is immersed in the calcium hydroxide solution for a set time;

[0064] S4: Open the exhaust pipe 43 to make the pressure in the reaction chamber 11 the same as the atmospheric pressure, and discharge the calcium hydroxide solution in the reaction chamber 11 through the drain pipe 34. After the aggregate reaches the saturated surface dry state, close the exhaust pipe 43 and the drain pipe 34;

[0065] S5: Carbon dioxide gas is delivered to the reaction chamber 11 through the gas delivery pipe to maintain the carbon dioxide concentration in the reaction chamber 11 at a target value, thereby achieving carbonization treatment of the aggregate.

[0066] The carbonization method of the recycled aggregate in the embodiment of the present invention creates a negative pressure environment before the aggregate is immersed in the calcium hydroxide solution, so as to facilitate the suction of impurities and air in the microcracks and microdefects, ensure the penetration of the calcium hydroxide solution into the microcracks and microdefects, and ensure that the carbonization products generated after the carbonization of the aggregate fill and repair the microcracks and microdefects, thereby enhancing the carbonization modification effect on the recycled aggregate.

[0067] Optionally, in step S2, the pressure value in the reaction chamber 11 is set to -0.1 MPa.

[0068] Optionally, in step S5, when the aggregate is carbonized, the pressure in the reaction chamber 11 is 0.1 MPa, the carbon dioxide concentration in the reaction chamber 11 is 95%, the gas humidity is 70%, and the temperature in the reaction chamber 11 is 25°C.

[0069] In some embodiments, a stirring component 5 is included. In step S3, when the aggregate is soaked, the aggregate is slowly stirred by the stirring component 5. In step S5, when the carbon dioxide concentration is maintained at the target value, the aggregate is slowly stirred by the stirring component 5.

[0070] By setting up the stirring assembly 5, when the aggregate is soaked, the calcium hydroxide solution can be promoted to penetrate into the micro cracks and micro defects of the aggregate. When the aggregate is carbonized, the carbon dioxide can be promoted to enter the micro cracks and micro defects, which is convenient for carbonization strengthening of the aggregate.

[0071] In some embodiments, in step S3, after closing the liquid inlet pipe 32, the exhaust pipe 22 is opened to evacuate the reaction chamber 11 again, so that the pressure in the reaction chamber 11 is restored to the set value.

[0072] By evacuating the reaction chamber 11 storing the calcium hydroxide solution again, a negative pressure environment is ensured in the reaction chamber 11, thereby ensuring the penetration effect of the calcium hydroxide solution on the micro-cracks and micro-defects of the aggregate, ensuring the compaction effect of the reaction of calcium hydroxide and carbon dioxide on the micro-cracks and micro-defects when the aggregate is carbonized, and ensuring the strengthening effect of the carbonization of the aggregate.

[0073] In some embodiments, a temperature and humidity sensor 8 and a temperature and humidity control unit 9 are included. In step S5, the temperature and humidity in the reaction chamber 11 are adjusted by the temperature and humidity sensor 8 and the temperature and humidity control unit 9 during the process of maintaining the carbon dioxide concentration.

[0074] The temperature and humidity of the gas in the reaction chamber 11 can be monitored by the temperature and humidity sensor 8, and the temperature and humidity in the reaction chamber 11 can be adjusted by the temperature and humidity control unit 9 to ensure that the temperature and humidity in the reaction chamber 11 meet the carbonization requirements.

[0075] In some embodiments, when the aggregate is carbonized, the pressure in the reaction chamber 11 is not less than 0.15 MPa. By pressurizing the reaction chamber 11, the carbonization efficiency of the aggregate is increased and the carbonization strengthening effect of the aggregate is ensured.

[0076] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0077] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0078] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0079] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0080] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0081] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A recycled aggregate high calcium supplement carbonization device, characterized in that: include: A reactor having a reaction chamber for accommodating aggregate; A vacuum pumping assembly, the vacuum pumping assembly comprising a vacuum pipe, the vacuum pipe is connected to the reactor and is used to perform a vacuum operation on the reaction chamber; A liquid supply component, the liquid supply component comprising a liquid inlet pipe and a liquid discharge pipe connected to the reactor, the liquid inlet pipe is used to transport the calcium hydroxide solution to the reaction chamber in a negative pressure state, and the liquid discharge pipe is used to discharge the calcium hydroxide solution in the reaction chamber; A gas supply component, the gas supply component includes an air inlet pipe and an exhaust pipe connected to the reactor, the air inlet pipe is used to transport carbon dioxide gas to the reaction chamber, and the exhaust pipe is used to exhaust the gas in the reaction chamber.

2. The recycled aggregate high calcium supplement carbonization device according to claim 1 is characterized in that: It comprises a stirring component, which comprises a stirring shaft and stirring blades. The stirring shaft is rotatably arranged on the reactor, and the stirring blades are fixed on the stirring shaft. The stirring blades are used to stir the aggregate in the reaction chamber.

3. The recycled aggregate high calcium supplement carbonization device according to claim 2 is characterized in that: It includes a filter plate, which is fixed to the reactor and has a set distance from the bottom of the reactor. The filter plate is arranged on one side of the stirring blade close to the bottom of the reactor. The filter plate is used to support aggregate and allow calcium hydroxide solution to pass through.

4. The recycled aggregate high calcium supplement carbonization device according to claim 1 is characterized in that: A plurality of storage layers are arranged in the reaction chamber at intervals along the up-down direction, the plurality of storage layers are used to store aggregates respectively, and the storage layer located at the top of the plurality of storage layers is located below the connection position between the liquid inlet pipe and the reactor.

5. The recycled aggregate high calcium supplement carbonization device according to claim 4, characterized in that: The material storage layer comprises a support portion fixedly connected to the side wall of the reactor and a material storage tray detachably assembled on the support portion, the material storage tray is used to store aggregates, and the material storage tray is provided with a through hole for the calcium hydroxide solution to pass through.

6. The recycled aggregate high calcium supplement carbonization device according to claim 1, characterized in that: The invention comprises a controller, a temperature and humidity sensor, a temperature and humidity control unit and a carbon dioxide sensor, wherein the controller is electrically connected to the temperature and humidity sensor, the temperature and humidity control unit and the carbon dioxide sensor respectively, the temperature and humidity sensor is arranged in the reaction chamber to monitor the temperature and humidity in the reaction chamber, the temperature and humidity control unit is arranged in the reactor and is used to adjust the temperature and humidity in the reaction chamber, and the carbon dioxide sensor is arranged in the reactor to monitor the concentration of carbon dioxide gas in the reaction chamber.

7. A method for carbonizing recycled aggregate, characterized in that: Based on the recycled aggregate high calcium supplementation carbonization device according to any one of claims 1 to 6, the carbonization method comprises the following steps: S1: placing aggregate in a reaction chamber and evacuating the reaction chamber through a vacuum pipe; S2: When the pressure in the reaction chamber reaches the set value, the air extraction pipe is closed, and the calcium hydroxide solution is transported into the reaction chamber through the liquid inlet pipe; S3: When the calcium hydroxide solution covers the aggregate, close the liquid inlet pipe and soak the aggregate in the calcium hydroxide solution for a set time; S4: Open the exhaust pipe to make the pressure in the reaction chamber the same as the atmospheric pressure, and discharge the calcium hydroxide solution in the reaction chamber through the drain pipe, and finally close the exhaust pipe and the drain pipe; S5: Carbon dioxide gas is delivered to the reaction chamber through the gas delivery pipe to maintain the carbon dioxide concentration in the reaction chamber at a target value, thereby achieving carbonization treatment of the aggregate.

8. The method for carbonizing recycled aggregate according to claim 7, characterized in that: The method comprises a stirring component. In step S3, when the aggregate is soaked, the aggregate is slowly stirred by the stirring component. In step S5, when the carbon dioxide concentration is maintained at a target value, the aggregate is slowly stirred by the stirring component.

9. The method for carbonizing recycled aggregate according to claim 7, characterized in that: In step S3, after closing the liquid inlet pipe, the exhaust pipe is opened to evacuate the reaction chamber again, so that the pressure in the reaction chamber is restored to the set value.

10. The method for carbonizing recycled aggregate according to claim 7, characterized in that: The system comprises a temperature and humidity sensor and a temperature and humidity control unit. In step S5, the temperature and humidity in the reaction chamber are adjusted by the temperature and humidity sensor and the temperature and humidity control unit during the process of maintaining the concentration of carbon dioxide.

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