Split type concrete stirring and CO2 mineralization equipment

Abstract

The invention relates to split type concrete stirring and CO2 mineralization equipment which comprises an upper layer module used for stirring concrete raw materials and a lower layer module arranged below the upper layer module and used for performing mineralization reaction, and the upper layer module comprises a first stirring barrel internally provided with a positive spiral stirrer. The lower-layer module comprises a second stirring barrel internally provided with an inverted spiral stirrer, and a gas outlet is formed in the middle of the inverted spiral stirrer so that CO2 can enter the second stirring barrel conveniently; a heating assembly, a temperature detection part, a CO2 concentration detection part and a pressure detection part are further arranged in the second stirring barrel. According to the invention, the design of matching of the positive spiral stirrer and the negative spiral stirrer is adopted, so that concrete raw materials are fully mixed within a short time, and material layering and uneven particle distribution are avoided in the stirring process; meanwhile, COgas is introduced into the second stirring barrel through the reverse spiral stirrer, so that the gas is in full contact with the slurry, and the optimization of mineralization reaction conditions is realized.

Description

Technical Field

[0001] The invention relates to a split type concrete mixing and CO2 mineralization equipment. Background Art

[0002] As the world pays more attention to carbon emission reduction, the technology of introducing CO2 into concrete production process to achieve carbon fixation and improve performance has gradually become a research hotspot. However, the existing CO2 concrete preparation equipment is mainly focused on laboratory research or small-scale application, and there are the following problems: (1) Uneven mixing: Existing CO2 concrete preparation equipment often integrates multiple functions into a single chamber, which easily leads to uneven mixing of the slurry in different areas, resulting in material accumulation and uneven gas distribution in some areas, which limits the efficiency of the CO2 mineralization reaction. (2) Lack of temperature and pressure control: CO2 mineralization reaction has relatively strict requirements on reaction temperature and pressure, but existing equipment usually lacks precise temperature and pressure control systems. Too low temperature or pressure will slow down the mineralization reaction process, while too high temperature or pressure may cause safety risks and lead to unstable equipment operation. (3) Insufficient CO2 utilization efficiency: During the gas injection process, CO2 gas may escape or fail to fully react with the slurry. In addition, unreasonable gas injection port design may also cause concentrated gas injection or local excess, making it impossible to fully utilize the gas, thus affecting the final carbon emission reduction effect. Overall, the existing CO2 concrete preparation equipment still has obvious deficiencies in terms of concrete mixing uniformity, mineralization reaction efficiency, temperature and pressure control, and CO2 gas utilization rate. It is urgently needed to improve and upgrade it with more advanced, environmentally friendly and efficient split concrete mixing and carbon fixation technology. Summary of the invention

[0003] The present invention makes improvements on the problems existing in the above-mentioned prior art, that is, the technical problem to be solved by the present invention is to provide a split concrete mixing and CO2 mineralization equipment.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a split concrete mixing and CO2 mineralization equipment, including an upper module for mixing concrete raw materials, and a lower module arranged below the upper module and performing a mineralization reaction, wherein the upper module includes a first mixing drum with a positive spiral agitator arranged inside, and a first feed port is arranged at the right end of the first mixing drum, and a first discharge port is arranged at the left end; the lower module includes a second mixing drum with a reverse spiral agitator arranged inside, and a second feed port is arranged at the top of the left end of the second mixing drum, and a second discharge port is arranged at the bottom of the right end, and a drop hopper is arranged between the first discharge port and the second feed port; a gas channel is arranged in the middle of the reverse spiral agitator to facilitate the flow of CO2, and the gas channel is connected to the inside of the second mixing drum via an outlet opened on its side wall, and the outlet facilitates CO2 to enter the second mixing drum; a heating component, a temperature detection component, a CO2 concentration detection component and a pressure detection component are also arranged inside the second mixing drum.

[0005] Furthermore, the first mixing drum is horizontally arranged, and the positive spiral agitator includes a first mixing shaft coaxially arranged with the first mixing drum, and the first mixing shaft is equipped with positively rotating spiral blades; the second mixing drum is horizontally arranged, and the reverse spiral agitator includes a second mixing shaft coaxially arranged with the second mixing drum, and the second mixing shaft is equipped with reversely rotating spiral blades, and the first mixing shaft and the second mixing shaft are driven by a power component to rotate synchronously.

[0006] Furthermore, the power assembly includes a power motor, a driving pulley, a first driven pulley, a second driven pulley, a first transmission belt and a second transmission belt. The power motor is horizontally arranged at the rear side of the left end of the first mixing drum. The output shaft of the power motor is connected to the driving pulley. The first driven pulley is installed at the left end of the first mixing shaft, and the first driven pulley is connected to the driving pulley through the first transmission belt; the second driven pulley is installed at the left end of the second mixing shaft, and the second driven pulley is connected to the first driven pulley through the second transmission belt.

[0007] Furthermore, the gas channel is coaxially arranged in the middle part of the second stirring shaft, and the left end of the second stirring shaft is provided with an air inlet connected to the gas channel, and the air inlet is used to connect with the CO2 delivery pipe; the second stirring shaft is provided with a plurality of air outlets on the circumferential side surface of the shaft section located inside the second stirring drum, and the plurality of air outlets are evenly spaced along the axial direction of the second stirring shaft, and each air outlet is composed of a plurality of air outlets evenly distributed circumferentially around the axis of the second stirring shaft.

[0008] Furthermore, the heating assembly includes a pair of connecting flanges rotatably mounted on the left and right ends of the second stirring shaft, and a plurality of heating rods evenly distributed in a circle are fixed between the pair of connecting flanges, and the heating rods are arranged horizontally.

[0009] Furthermore, the temperature detecting element is a temperature sensor arranged on the connecting flange located at the left end of the second stirring shaft; the pressure detecting element is a pressure sensor arranged on the connecting flange located at the left end of the second stirring shaft; the CO2 concentration detecting element is a CO2 concentration detection sensor arranged on the connecting flange located at the right end of the second stirring shaft, and the temperature sensor, pressure sensor, CO2 concentration detection sensor, and heating rod are all electrically connected to the control unit.

[0010] Furthermore, the first stirring shaft is fixed with a plurality of cross-shaped first support frames at intervals along the axial direction, and the positively rotating spiral blades are installed on the plurality of first support frames; the second stirring shaft is fixed with a plurality of cross-shaped second support frames at intervals along the axial direction, and the negatively rotating spiral blades are installed on the plurality of second support frames.

[0011] Furthermore, both the left and right ends of the first mixing drum are open, the right end of the first mixing drum is open as the first feed port, and a feed hopper is provided at the lower end of the first feed port; both the left and right ends of the second mixing drum are closed, and a discharge hopper is provided below the second discharge port; sealing plates can be removably provided at the second feed port and the second discharge port.

[0012] Furthermore, it also includes a frame, the upper module and the lower module are both installed on the frame, and the frame is provided with a protective cover which is arranged above the first mixing drum.

[0013] Furthermore, a plurality of gear rings are arranged at intervals on the outer peripheral side surfaces of the first mixing drum and the second mixing drum along the axial direction, and each gear ring is respectively meshed with a pair of driving gears distributed front and rear, and one of the driving gears is connected to the driving motor.

[0014] Compared with the prior art, the present invention has the following effects: the present invention adopts a positive spiral and reverse spiral double agitator coordinated design to ensure that the concrete raw materials are fully mixed in a short time, and avoid material stratification and uneven particle distribution during the mixing process; at the same time, CO2 gas is introduced into the second mixing drum through the reverse spiral agitator to make the gas fully contact with the slurry and optimize the mineralization reaction conditions; at the same time, the overall structural design is reasonable, and the upper and lower layered split design divides the mixing and mineralization reactions into zones, which is not only convenient for transportation and installation, but also convenient for daily maintenance and component replacement, shortening downtime and improving equipment utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the three-dimensional structure of an embodiment of the present invention; Figure 2 1 is a schematic diagram of a front cross-sectional structure of an embodiment of the present invention; Figure 3is a schematic diagram of a top view of the structure of an embodiment of the present invention; Figure 4 is a right view structural schematic diagram of an embodiment of the present invention; Figure 5 is a schematic diagram of a right side cross-sectional structure of an embodiment of the present invention; Figure 6 is a schematic diagram of the three-dimensional structure of the second mixing drum in an embodiment of the present invention; Figure 7 Schematic diagram of the internal structure of the positive spiral agitator in an embodiment of the present invention; Figure 8 Schematic diagram of the internal structure of the reverse spiral agitator in an embodiment of the present invention; Fig. 9 is a schematic diagram of the three-dimensional structure of the heating assembly in an embodiment of the present invention; Fig.10 It is a schematic diagram of the three-dimensional structure of the drop hopper in an embodiment of the present invention.

[0016] In the figure: 1-frame; 2-upper module; 3-lower module; 4-positive spiral agitator; 5-first mixing drum; 6-first feed inlet; 7-first discharge outlet; 8-reverse spiral agitator; 9-second mixing drum; 10-second feed inlet; 11-second discharge outlet; 12-air outlet; 13-first mixing shaft; 14-positive rotating spiral blade; 15-second mixing shaft; 16-reverse rotating spiral blade; 17-driving pulley; 18-first driven pulley; 19-second driven pulley ; 20-first transmission belt; 21-second transmission belt; 22-air inlet; 23-connecting flange; 24-heating rod; 25-temperature sensor; 26-pressure sensor; 27-CO2 concentration detection sensor; 28-first support frame; 29-second support frame; 30-feed hopper; 31-discharge hopper; 32-sealing plate; 33-protective cover; 34-gear ring; 35-driving gear; 36-gas channel; 37-power motor; 38-bearing; 39-drop hopper. DETAILED DESCRIPTION

[0017] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0019] like Figures 1 to 10 As shown, the present invention is a split concrete mixing and CO2 mineralization equipment, whose main function is to evenly mix the concrete raw materials and inject CO2 gas, generate calcium carbonate crystals through chemical reaction, thereby significantly improving the compressive strength and durability of the concrete, and effectively solidifying CO2, helping to achieve the carbon emission reduction target; the modular design concept of the equipment enables it to have the advantages of clear functions, convenient operation, and simple maintenance, and adapt to a variety of complex working conditions. The equipment specifically includes a frame 1, an upper module 2 for mixing concrete raw materials, and a lower module 3 arranged below the upper module 2 and performing a mineralization reaction. The upper module and the lower module are both installed on the frame. The upper module 2 includes a first mixing drum 5 with a positive spiral agitator 4 arranged inside, and a first feed port 6 is arranged at the right end of the first mixing drum 5 and a first discharge port 7 is arranged at the left end. The first feed port is used to facilitate the concrete raw materials (cement, aggregate, water, etc.) to enter the first mixing drum, and the first discharge port is used to facilitate the output of concrete evenly mixed by the positive spiral agitator to the lower module; The lower module 3 includes a second mixing drum 9 with a reverse spiral agitator 8 disposed therein, a second feed port 10 is disposed at the top of the left end of the second mixing drum 9, and a second discharge port 11 is disposed at the bottom of the right end. The second feed port facilitates the concrete mixed evenly by the upper module to enter the second mixing drum, and a drop hopper 39 is disposed between the first discharge port 7 and the second feed port 10, and the drop hopper can facilitate the slurry to fall; the reverse spiral agitator 8 adopts low-speed stirring, and a gas channel 3 is disposed in the middle of the reverse spiral agitator 8 to facilitate the flow of CO2 6. CO2 can be introduced into the gas channel. The gas channel 36 is connected to the interior of the second mixing drum 9 via the gas outlet 12 opened on its side wall. The gas outlet is used to facilitate the CO2 in the gas channel to enter the second mixing drum 9. The second mixing drum 9 is also provided with a heating component, a temperature detection component, a CO2 concentration detection component and a pressure detection component. The heating component is used to heat the slurry in the second mixing drum, the temperature detection component detects the temperature, the CO2 concentration detection component detects the CO2 concentration, and the pressure detection component detects the gas pressure.

[0020] The equipment adopts a modular structure with upper and lower layers. The upper module is responsible for the uniform mixing of concrete raw materials (cement, aggregate, water, etc.). The efficient mixing of the positive spiral agitator ensures that the slurry is evenly mixed and has no stratification, providing an ideal basic slurry for subsequent mineralization reactions. The slurry output by the upper module falls into the lower module by gravity, thus avoiding the energy consumption and complexity of mechanical conveying equipment. The lower module mainly completes the mineralization reaction, and provides the best reaction conditions through uniform CO2 injection, low-speed stirring, temperature control and pressure regulation with the reverse spiral agitator to ensure mineralization efficiency and slurry quality.

[0021] In this embodiment, the first mixing drum 5 is horizontally arranged, and the forward spiral agitator 4 includes a first mixing shaft 13 coaxially arranged with the first mixing drum 5, and the first mixing shaft 13 is provided with a forward rotating spiral blade 14; the second mixing drum 9 is horizontally arranged and located directly below the first mixing drum 5, and the reverse spiral agitator 8 includes a second mixing shaft 15 coaxially arranged with the second mixing drum 9, and the second mixing shaft 15 is provided with a reverse rotating spiral blade 16, and the first mixing shaft and the second mixing shaft are driven by a power component to rotate synchronously, the first mixing shaft drives the forward rotating spiral blade to rotate, and the second mixing shaft drives the reverse rotating spiral blade to rotate.

[0022] Specifically, the power assembly includes a power motor 37, a driving pulley 17, a first driven pulley 18, a second driven pulley 19, a first transmission belt 20 and a second transmission belt 21. The power motor 37 is arranged horizontally at the rear side of the left end of the first mixing drum 5 and is installed on the frame 1. The output shaft of the power motor 37 extends to the left and is connected with the driving pulley 17. The first driven pulley 18 is installed at the left end of the first mixing shaft 13. The first driven pulley 18 and the driving pulley 17 are connected through the first transmission belt 20. The second driven pulley 19 is installed at the left end of the second mixing shaft 15. The second driven pulley 19 and the first driven pulley 18 are connected through the second transmission belt 21. When working, the power motor drives the driving pulley to rotate, the driving pulley drives the first driven pulley to rotate through the first transmission belt, the first driven pulley drives the first mixing shaft to rotate, and the first driven pulley drives the second driven pulley to rotate through the second transmission belt, and the second driven pulley drives the second mixing shaft to rotate.

[0023] In this embodiment, the gas channel 36 is coaxially arranged in the middle of the second stirring shaft 15, and the left end of the second stirring shaft 15 is provided with an air inlet 22 connected to the gas channel 36, and the air inlet 22 is used to connect with a CO2 delivery pipe (not shown in the figure), and the CO2 delivery pipe can be connected to a CO2 pump, and CO2 in industrial waste gas can be injected into the gas channel when in use; the second stirring shaft 15 is provided with a plurality of air outlets on the side surface of the shaft section inside the second mixing drum 9, and the plurality of air outlets are evenly spaced along the axial direction of the second stirring shaft 15, and each air outlet is composed of a plurality of air outlets 12 evenly distributed around the axis of the second stirring shaft 15. When working, the CO2 delivery pipe is connected with the air inlet at the left end of the second stirring shaft through a rotary joint, and CO2 is delivered into the gas channel through the CO2 delivery pipe, and CO2 enters the inside of the second mixing drum from the air outlet. By designing multiple evenly distributed CO2 outlets on the second stirring shaft, it is ensured that the gas can contact the slurry efficiently and evenly, optimizing the mineralization reaction effect. At the same time, the structure is sturdy and has good corrosion resistance, which can adapt to complex working conditions.

[0024] In this embodiment, the heating assembly includes a pair of connecting flanges 23 rotatably sleeved on the left and right ends of the second stirring shaft 15, and a plurality of heating rods 24 evenly distributed in a circumference are fixed between the pair of connecting flanges 23. The heating rods 24 are arranged horizontally, and the heating rods are used to heat the inside of the second mixing drum. It should be noted that a heating assembly can also be arranged in the first mixing drum, and the specific structure of the heating assembly in the first mixing drum is the same as that of the heating assembly in the second mixing drum, and no further repetition will be made here.

[0025] In this embodiment, the temperature detection member is a temperature sensor 25 arranged on the connecting flange 24 at the left end of the second stirring shaft 15, and the temperature detection sensor monitors the internal temperature of the second stirring drum in real time; the pressure detection member is a pressure sensor 26 arranged on the connecting flange 24 at the left end of the second stirring shaft 15, and the pressure sensor monitors the pressure change in real time to prevent the occurrence of overpressure accidents, and the pressure sensor and the temperature sensor are distributed in the upper and lower parts; the CO2 concentration detection member is a CO2 concentration detection sensor 27 arranged on the connecting flange 24 at the right end of the second stirring shaft 15, and the CO2 concentration detection sensor detects the CO2 gas concentration in the second stirring drum to ensure the maximum utilization of gas, avoid waste, and optimize the efficiency of the mineralization reaction. The temperature sensor, pressure sensor, CO2 concentration detection sensor, and heating rod are all electrically connected to the control unit, and the control unit can adopt PLC. The temperature sensor monitors the temperature in the second stirring drum in real time, and the heating rod provides accurate heat regulation to ensure that the mineralization reaction is carried out within the optimal temperature range; the pressure sensor monitors the pressure in the second stirring drum to ensure the safe operation of the equipment; the CO2 concentration detection sensor optimizes the injection and recycling rate of the gas to reduce resource waste. All data is summarized by the control unit, allowing operators to understand the equipment status in real time and dynamically adjust operating parameters as needed.

[0026] In this embodiment, the first stirring shaft 13 is fixed with a plurality of cross-shaped first support frames 28 at intervals along the axial direction, and the positively rotating spiral blades 14 are installed on the plurality of first support frames 28, that is, the first stirring shaft, the first support frames and the positively rotating spiral blades are connected as a whole.

[0027] In this embodiment, the second stirring shaft 15 is fixed with a plurality of cross-shaped second support frames 29 at intervals along the axial direction, and the counter-rotating spiral blades 16 are installed on the plurality of second support frames 29, that is, the second stirring shaft, the second support frames and the counter-rotating spiral blades are connected as a whole.

[0028] In this embodiment, both left and right ends of the first mixing drum 5 are open, and the right end of the first mixing drum 5 is open as a first feed port. A feed hopper 30 is provided at the lower end of the first feed port to facilitate feeding.

[0029] In this embodiment, both the left and right ends of the second mixing drum 9 are in a closed state, and a discharge hopper 31 is provided below the second discharge port to facilitate discharge.

[0030] In this embodiment, sealing plates 32 are detachably provided at the second feed port and the second discharge port, and the sealing plates are used for sealing.

[0031] In this embodiment, a protective cover 33 is provided on the frame 1 and covers the first mixing drum.

[0032] In this embodiment, the drop hopper is a funnel device, which ensures smooth outflow of the slurry, reduces blockage, and thus reduces manual intervention.

[0033] In this embodiment, the first mixing drum and the second mixing drum are both made of high-strength wear-resistant materials, and the inner walls are treated with anti-adhesion to prevent slurry residue and facilitate cleaning.

[0034] In this embodiment, both left and right ends of the first stirring shaft extend out of the first stirring drum and are connected to the bearing 38 installed on the frame; both left and right ends of the second stirring shaft extend out of the second stirring drum and are connected to the bearing installed on the frame.

[0035] In another embodiment, the outer peripheral side surfaces of the first mixing drum 5 and the second mixing drum 9 are provided with a plurality of gear rings 34 at intervals along the axial direction, and each gear ring 34 is respectively meshed with a pair of driving gears 35 distributed in front and rear, and the driving gears are installed on the frame, and one of the driving gears is connected to the driving motor (not shown in the figure). By providing gear rings and driving gears on the outside of the first mixing drum and the second mixing drum, the driving motor drives the driving gear to rotate, the driving gear drives the gear ring to rotate, and then the gear ring drives the corresponding mixing drum to rotate, that is, the mixing drum and the agitator inside can rotate independently, and the rotation directions of the mixing drum and the agitator inside can be the same or opposite. By designing the mixing drum to be rotatable, the agitator cooperates with the mixing drum to further improve the stirring effect. It should be noted that whether the mixing drum rotates can be selected according to needs.

[0036] When using the device: 1. Preparation: Before using the equipment, you need to prepare the raw materials required for concrete production (cement, aggregate, water, etc.) and weigh them according to the proportion. The equipment operator needs to check the equipment's motor, agitator, sensor and sealing system to ensure that all components are in good condition and clean without residue. At the same time, confirm that the CO2 gas reserve is sufficient, and set key parameters such as mixing speed, temperature control range, gas injection volume, etc. to meet specific production needs; 2. Raw material feeding and stirring: Raw materials are fed into the first stirring drum in sequence through the feeding hopper to ensure uniform feeding and avoid excessive feeding at one time, which may lead to a decrease in stirring efficiency. After starting the positive spiral stirrer, the equipment mixes the raw materials efficiently at the set speed; 3. Slurry transportation: The mixed slurry flows naturally through the drop hopper to the second mixing drum of the lower module. Since the slurry adopts gravity transportation design, the equipment does not need a complex mechanical transmission structure, thereby reducing energy consumption, avoiding residue or secondary contamination of materials during transportation, and improving overall work efficiency; 4. CO2 injection and mineralization reaction: After the slurry enters the lower module, CO2 gas is evenly injected through the air inlet at the left end of the second stirring shaft, and the reverse spiral agitator is started. The reverse spiral agitator rotates at a low speed to ensure that the gas is fully in contact with the slurry. The temperature in the second mixing drum is detected in real time, and the heating rod is used to keep the reaction temperature within the optimal range. At the same time, the pressure sensor dynamically adjusts the pressure to ensure stable reaction conditions. In this process, CO2 reacts with the calcium ions in the slurry to form calcium carbonate crystals, which greatly improves the performance of concrete and achieves the carbon fixation goal; 5. Slurry discharge: After the mineralization reaction is completed, the slurry is discharged smoothly through the discharge hopper for subsequent maintenance or direct pouring; 6. Equipment cleaning and maintenance: After each use, key components such as the mixing drum, feed hopper and discharge hopper should be cleaned in time to prevent the slurry residue from hardening and affecting the normal operation of the equipment. Regularly check the equipment's sensors, bearings, seals and other components to ensure the stable performance of each functional module. Maintenance work should include lubricating transmission parts, replacing aging seals, etc., to extend the service life of the equipment and keep it in efficient operation.

[0037] Purpose of the device: 1. Efficient mixing and mineralization reaction in concrete production The equipment is used for uniform mixing of concrete raw materials (cement, aggregates and water, etc.) and carbon dioxide mineralization reaction during the production of building materials. Through efficient mixers and precise gas injection, the uniformity and stability of concrete are improved, while CO2 is converted into calcium carbonate crystals to improve the compressive strength and durability of the material; 2. Preparation of low-carbon and environmentally friendly building materials The equipment injects CO2 from industrial waste gas into concrete slurry and solidifies it as part of the concrete structure, achieving carbon capture and utilization (CCU), reducing carbon emissions, and facilitating the production of green building materials. It is suitable for the mass preparation and innovative application of low-carbon and environmentally friendly building materials. 3. Production of high-strength and high-durability concrete It is suitable for the production of concrete products with high requirements for mechanical properties and durability, such as the preparation of components in key projects such as bridges, high-rise buildings, and infrastructure. The crack resistance and erosion resistance of concrete are further improved through mineralization reaction; 4. Manufacture of special-purpose building components Used to produce special building components with requirements for frost resistance, sulfate corrosion resistance and high density, such as concrete products used in underground tunnels, marine structures and special environments, to meet special needs under different working conditions; 5. Experimental equipment in scientific research and development The equipment is suitable for building materials research institutions and university laboratories. As an experimental equipment for developing new low-carbon concrete or studying the mechanism of CO2 mineralization, it provides controllable temperature, pressure and gas concentration adjustment to facilitate data collection and analysis. 6. Industrial application of carbon emission reduction technology in the construction industry As an advanced low-carbon production technology equipment, it can realize the industrial promotion and application of carbon emission reduction technology in the construction industry, help the construction industry transform into a more environmentally friendly and sustainable model, and promote the implementation of the green development strategy.

[0038] The advantages of the present invention are: 1. Efficient mixing and improved uniformity The equipment adopts a positive spiral and reverse spiral double agitator design to ensure that the concrete raw materials are fully mixed in a short time; the material stratification and uneven particle distribution are avoided during the mixing process. It is particularly suitable for formulas with high water content or complex aggregate ratios, providing uniform and stable slurry for subsequent mineralization reactions and improving product quality. 2. Precision mineralization and concrete performance optimization By evenly injecting CO2 gas into the second stirring shaft, combined with low-speed stirring and precise temperature control, the gas and slurry are fully in contact, optimizing the mineralization reaction conditions; the generated calcium carbonate crystals are embedded in the concrete structure, which not only effectively solidifies carbon dioxide, but also greatly improves the compressive strength, crack resistance and durability of the concrete, meeting high-standard construction requirements; 3. Intelligent control and efficient operation Equipped with temperature, pressure, CO2 concentration sensors and PLC intelligent control system to achieve real-time monitoring and dynamic adjustment of operating parameters, ensuring safe operation of equipment under complex working conditions; 4. Split design and easy maintenance The upper and lower layered split design divides the functions such as stirring, mineralization reaction, and power transmission into zones, which operate independently but closely cooperate with each other. This structure is not only convenient for transportation and installation, but also for daily maintenance and parts replacement, shortening downtime and improving equipment utilization.

[0039] If the present invention discloses or involves components or structures that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connection using bolts or screws), and can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integrated structure (for example, manufactured by one-piece molding using a casting process) (except when it is obviously impossible to use an one-piece molding process).

[0040] In addition, unless otherwise stated, the terms used to indicate positional relationships or shapes in any of the technical solutions disclosed in the present invention include states or shapes that are approximate, similar, or close to them.

[0041] Any component provided by the present invention may be assembled from a plurality of separate components, or may be a separate component manufactured by an integral forming process.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A split concrete mixing and CO2 mineralization equipment, characterized by: It includes an upper module for mixing concrete raw materials and a lower module arranged below the upper module and performing mineralization reaction, wherein the upper module includes a first mixing drum with a positive spiral agitator arranged inside, a first feed port is arranged at the right end of the first mixing drum, and a first discharge port is arranged at the left end; the lower module includes a second mixing drum with a reverse spiral agitator arranged inside, a second feed port is arranged at the top of the left end of the second mixing drum, and a second discharge port is arranged at the bottom of the right end, and a drop hopper is arranged between the first discharge port and the second feed port; a gas channel for facilitating the flow of CO2 is arranged in the middle of the reverse spiral agitator, and the gas channel is connected with the inside of the second mixing drum via an outlet opened on its side wall, and the outlet is for facilitating the entry of CO2 into the second mixing drum; a heating component, a temperature detection component, a CO2 concentration detection component and a pressure detection component are also arranged inside the second mixing drum.

2. The split type concrete mixing and CO2 mineralization equipment according to claim 1 is characterized in that: The first mixing drum is arranged horizontally, and the positive spiral agitator includes a first mixing shaft arranged coaxially with the first mixing drum, and the first mixing shaft is provided with positively rotating spiral blades; the second mixing drum is arranged horizontally, and the reverse spiral agitator includes a second mixing shaft arranged coaxially with the second mixing drum, and the second mixing shaft is provided with reversely rotating spiral blades, and the first mixing shaft and the second mixing shaft are driven by a power component to rotate synchronously.

3. The split type concrete mixing and CO2 mineralization equipment according to claim 2 is characterized in that: The power assembly includes a power motor, a driving pulley, a first driven pulley, a second driven pulley, a first transmission belt and a second transmission belt. The power motor is horizontally arranged at the rear side of the left end of the first mixing drum. The output shaft of the power motor is connected to the driving pulley. The first driven pulley is installed at the left end of the first mixing shaft, and the first driven pulley is connected to the driving pulley through the first transmission belt; the second driven pulley is installed at the left end of the second mixing shaft, and the second driven pulley is connected to the first driven pulley through the second transmission belt.

4. The split type concrete mixing and CO2 mineralization equipment according to claim 2 is characterized in that: The gas channel is coaxially arranged in the middle of the second stirring shaft, and an air inlet connected to the gas channel is opened at the left end of the second stirring shaft, and the air inlet is used to connect with the CO2 delivery pipe; the second stirring shaft is provided with a plurality of air outlets on the circumferential side surface of the shaft section located inside the second stirring drum, and the plurality of air outlets are evenly spaced along the axial direction of the second stirring shaft, and each air outlet is composed of a plurality of air outlets evenly distributed circumferentially around the axis of the second stirring shaft.

5. The split type concrete mixing and CO2 mineralization equipment according to claim 2 is characterized in that: The heating assembly comprises a pair of connecting flanges rotatably sleeved on the left and right ends of the second stirring shaft, and a plurality of heating rods uniformly distributed in a circle are fixed between the pair of connecting flanges, and the heating rods are arranged in a transverse direction.

6. The split type concrete mixing and CO2 mineralization equipment according to claim 5 is characterized in that: The temperature detecting element is a temperature sensor arranged on the connecting flange at the left end of the second stirring shaft; the pressure detecting element is a pressure sensor arranged on the connecting flange at the left end of the second stirring shaft; the CO2 concentration detecting element is a CO2 concentration detection sensor arranged on the connecting flange at the right end of the second stirring shaft, and the temperature sensor, pressure sensor, CO2 concentration detection sensor, and heating rod are all electrically connected to the control unit.

7. The split type concrete mixing and CO2 mineralization equipment according to claim 2 is characterized in that: The first stirring shaft is fixed with a plurality of cross-shaped first support frames at intervals along the axial direction, and the positively rotating spiral blades are installed on the plurality of first support frames; the second stirring shaft is fixed with a plurality of cross-shaped second support frames at intervals along the axial direction, and the counter-rotating spiral blades are installed on the plurality of second support frames.

8. The split type concrete mixing and CO2 mineralization equipment according to claim 1 is characterized in that: The left and right ends of the first mixing drum are open, the right end of the first mixing drum is open as the first feed port, and a feed hopper is arranged at the lower end of the first feed port; the left and right ends of the second mixing drum are closed, and a discharge hopper is arranged below the second discharge port; sealing plates are removably arranged at the second feed port and the second discharge port.

9. The split type concrete mixing and CO2 mineralization equipment according to claim 1 is characterized in that: The machine also comprises a frame, the upper module and the lower module are both mounted on the frame, and the frame is provided with a protective cover which is arranged above the first mixing drum.

10. The split type concrete mixing and CO2 mineralization equipment according to claim 1 is characterized in that: The outer peripheral side surfaces of the first mixing drum and the second mixing drum are provided with a plurality of gear rings at intervals along the axial direction, and each gear ring is respectively meshed with a pair of driving gears distributed front and rear, and one of the driving gears is connected to the driving motor.

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