Split-type concrete mixing and CO2 mineralization equipment

Abstract

This invention relates to a split-type concrete mixing and CO2 mineralization equipment, comprising an upper module for mixing concrete raw materials and a lower module located below the upper module for the mineralization reaction. The upper module includes a first mixing drum with a positive spiral agitator inside, and the lower module includes a second mixing drum with a negative spiral agitator inside. A gas outlet is provided in the middle of the negative spiral agitator to facilitate CO2 entry into the second mixing drum. The second mixing drum also contains a heating element, a temperature sensor, a CO2 concentration sensor, and a pressure sensor. This invention employs a dual-agitator design with both positive and negative spirals to ensure thorough mixing of concrete raw materials in a short time, avoiding material stratification and uneven particle distribution during mixing. Simultaneously, CO₂ gas is introduced into the second mixing drum through the negative spiral agitator, allowing the gas to fully contact the slurry and optimizing the mineralization reaction conditions.

Description

Technical Field

[0001] This invention relates to a split-type concrete mixing and CO2 mineralization equipment. Background Technology

[0002] With increasing global emphasis on carbon emission reduction, the technology of introducing CO2 into the concrete production process to achieve carbon sequestration and performance enhancement has gradually become a research hotspot. However, existing CO2 concrete preparation equipment is mainly concentrated in laboratory research or small-scale applications, and has the following problems:

[0003] (1) Uneven mixing: Existing CO2 concrete preparation equipment often integrates multiple functions into a single cavity in its design, which can easily lead to uneven mixing of the slurry in different areas, resulting in material accumulation in some areas and uneven gas distribution, thus limiting the efficiency of CO2 mineralization reaction.

[0004] (2) Lack of temperature and pressure control: CO2 mineralization reaction has strict requirements for reaction temperature and pressure, but existing equipment usually lacks a precise temperature and pressure control system. Too low a temperature or pressure will slow down the mineralization reaction process, while too high a temperature or pressure may cause safety risks and lead to unstable equipment operation.

[0005] (3) Insufficient CO2 utilization efficiency: During the gas injection process, there are situations where CO2 gas escapes or cannot fully react with the slurry; in addition, unreasonable gas injection port design may also cause concentrated gas injection or local excess, which will not be able to fully utilize the gas, thus affecting the final carbon emission reduction effect.

[0006] In summary, existing CO2 concrete preparation equipment still has significant shortcomings in terms of concrete mixing uniformity, mineralization reaction efficiency, temperature and pressure control, and CO2 gas utilization rate. There is an urgent need for more advanced, environmentally friendly, and efficient split-type concrete mixing and carbon fixation technology to improve and enhance these aspects. Summary of the Invention

[0007] The present invention addresses the problems existing in the prior art, namely, the technical problem to be solved by the present invention is to provide a split-type concrete mixing and CO2 mineralization equipment.

[0008] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a split-type concrete mixing and CO2 mineralization equipment, comprising an upper module for mixing concrete raw materials and a lower module located below the upper module for carrying out the mineralization reaction. The upper module includes a first mixing drum with a positive spiral stirrer inside, a first feed inlet at the right end and a first discharge outlet at the left end of the first mixing drum. The lower module includes a second mixing drum with a reverse spiral stirrer inside, a second feed inlet at the top left end and a second discharge outlet at the bottom right end of the second mixing drum, and a discharge hopper between the first discharge outlet and the second feed inlet. A gas channel for facilitating CO2 flow is provided in the middle of the reverse spiral stirrer, and the gas channel is connected to the interior of the second mixing drum through an outlet on its side wall, the outlet facilitating CO2 entry into the second mixing drum. The interior of the second mixing drum also includes a heating component, a temperature detection component, a CO2 concentration detection component, and a pressure detection component.

[0009] Furthermore, the first mixing drum is horizontally arranged, and the positive spiral stirrer includes a first stirring shaft coaxially arranged with the first mixing drum, on which positively rotating spiral blades are fitted; the second mixing drum is horizontally arranged, and the negative spiral stirrer includes a second stirring shaft coaxially arranged with the second mixing drum, on which negatively rotating spiral blades are fitted; the first stirring shaft and the second stirring shaft are driven to rotate synchronously by a power component.

[0010] 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 laterally positioned on the rear left side of the first stirring drum. The output shaft of the power motor is connected to the driving pulley. The first driven pulley is installed on the left end of the first stirring shaft and is connected to the driving pulley via the first transmission belt. The second driven pulley is installed on the left end of the second stirring shaft and is connected to the first driven pulley via the second transmission belt.

[0011] Furthermore, 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. The air inlet is used to connect to the CO2 conveying pipe. Multiple air outlets are opened on the circumferential side of the shaft section of the second stirring shaft located inside the second stirring drum. The multiple air outlets are evenly distributed along the axial direction of the second stirring shaft, and each air outlet consists of multiple air outlets evenly distributed in a circle around the axis of the second stirring shaft.

[0012] Furthermore, the heating assembly includes a pair of rotatable connecting flanges fitted at 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, the heating rods being arranged horizontally.

[0013] Furthermore, the temperature detection element is a temperature sensor installed on the connecting flange located at the left end of the second stirring shaft; the pressure detection element is a pressure sensor installed on the connecting flange located at the left end of the second stirring shaft; the CO2 concentration detection element is a CO2 concentration detection sensor installed 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.

[0014] Furthermore, the first stirring shaft is fixed with several cross-shaped first support frames at intervals along the axial direction, and the forward rotating spiral blades are mounted on several first support frames; the second stirring shaft is fixed with several cross-shaped second support frames at intervals along the axial direction, and the reverse rotating spiral blades are mounted on several second support frames.

[0015] Furthermore, the left and right ends of the first mixing drum are open, the right end of the first mixing drum is the first feed inlet, and a feed hopper is provided at the lower end of the first feed inlet; the left and right ends of the second mixing drum are closed, and a discharge hopper is provided below the second discharge outlet; sealing plates can be detachably installed at both the second feed inlet and the second discharge outlet.

[0016] Furthermore, it also includes a frame, on which both the upper and lower modules are mounted, and a protective cover is provided on the frame to cover the first mixing drum.

[0017] Furthermore, the outer peripheral surfaces of the first and second stirring drums are each provided with a number of toothed rings at intervals along the axial direction. Each toothed ring meshes with a pair of front and rear distributed drive gears, one of which is connected to a drive motor.

[0018] Compared with the prior art, the present invention has the following advantages: The present invention adopts a design with a combination of positive and negative spiral mixers to ensure that the concrete raw materials are fully mixed in a short time, and to 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 negative spiral mixer, so that the gas and slurry are in full contact, and the mineralization reaction conditions are optimized; at the same time, the overall structure is reasonably designed, with upper and lower layered and separate design, which divides the mixing and mineralization reaction into zones, which not only facilitates transportation and installation, but also facilitates daily maintenance and component replacement, shortens downtime, and improves equipment utilization. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the front cross-sectional structure of an embodiment of the present invention;

[0021] Figure 3 This is a top view of the structure of an embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the right-side structure according to an embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the right-side cross-sectional structure of an embodiment of the present invention;

[0024] Figure 6 This is a three-dimensional structural schematic diagram of the second stirring cylinder in an embodiment of the present invention;

[0025] Figure 7 This is a schematic diagram of the internal structure of the spiral stirrer in an embodiment of the present invention;

[0026] Figure 8 This is a schematic diagram of the internal structure of the anti-spiral stirrer in an embodiment of the present invention;

[0027] Figure 9 This is a three-dimensional structural diagram of the heating component in an embodiment of the present invention;

[0028] Figure 10 This is a three-dimensional structural diagram of the hopper in an embodiment of the present invention.

[0029] In the picture:

[0030] 1-Frame; 2-Upper module; 3-Lower module; 4-Forward 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-Forward rotating spiral blade; 15-Second mixing shaft; 16-Reverse rotating spiral blade; 17-Driven pulley; 18-First driven pulley; 19-Second driven pulley ; 20-First drive belt; 21-Second drive belt; 22-Air inlet; 23-Connecting flange; 24-Heating rod; 25-Temperature sensor; 26-Pressure sensor; 27-CO2 concentration 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-Drive gear; 36-Gas passage; 37-Power motor; 38-Bearing; 39-Discharge hopper. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0032] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0033] like Figures 1-10 As shown, this invention discloses a split-type concrete mixing and CO2 mineralization equipment. Its main function is to uniformly mix concrete raw materials and inject CO2 gas, generating calcium carbonate crystals through a chemical reaction. This significantly improves the compressive strength and durability of the concrete, while effectively solidifying CO2, contributing to the achievement of carbon emission reduction targets. The modular design of the equipment gives it advantages such as clear functions, convenient operation, and simple maintenance, adapting to various complex working conditions. Specifically, the equipment includes a frame 1, an upper module 2 for mixing concrete raw materials, and a lower module 3 located below the upper module 2 for the mineralization reaction. Both the upper and lower modules are mounted on the frame. The upper module 2 includes a first mixing drum 5 with a positive spiral mixer 4 inside. The first mixing drum 5 has a first inlet 6 at its right end and a first outlet 7 at its left end. The first inlet facilitates the entry of concrete raw materials (cement, aggregate, water, etc.) into the first mixing drum, and the first outlet facilitates the output of the uniformly mixed concrete to the lower module. The lower module 3 includes a second mixing drum 9 with an internal anti-spiral mixer 8. The second mixing drum 9 has a second inlet 10 at the top left end and a second outlet 11 at the bottom right end. The second inlet allows concrete from the upper module to enter the second mixing drum evenly. A hopper 39 is located between the first outlet 7 and the second inlet 10 to facilitate the discharge of slurry. The anti-spiral mixer 8 operates at low speed, and a gas channel 3 is located in the middle of the anti-spiral mixer 8 to facilitate CO2 flow. 6. CO2 can be introduced into the gas channel. The gas channel 36 is connected to the interior of the second stirring drum 9 via the gas outlet 12 opened on its side wall. The gas outlet facilitates the entry of CO2 in the gas channel into the second stirring drum 9. The interior of the second stirring drum 9 is also equipped 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 stirring 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.

[0034] 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.). Utilizing a high-efficiency spiral mixer, it ensures uniform mixing and prevents stratification of the slurry, providing an ideal base slurry for subsequent mineralization reactions. The slurry output from the upper module falls into the lower module by gravity, thus avoiding the energy consumption and complexity of mechanical conveying equipment. The lower module primarily completes the mineralization reaction. Through uniform CO2 injection, combined with low-speed mixing by a counter-spiral mixer, temperature control, and pressure regulation, it provides optimal reaction conditions, ensuring both mineralization efficiency and slurry quality.

[0035] In this embodiment, the first stirring drum 5 is horizontally arranged, and the positive spiral stirrer 4 includes a first stirring shaft 13 coaxially arranged with the first stirring drum 5, on which a positive rotating spiral blade 14 is fitted; the second stirring drum 9 is horizontally arranged and located directly below the first stirring drum 5, and the negative spiral stirrer 8 includes a second stirring shaft 15 coaxially arranged with the second stirring drum 9, on which a negative rotating spiral blade 16 is fitted. The first stirring shaft and the second stirring shaft are driven to rotate synchronously by a power component, the first stirring shaft drives the positive rotating spiral blade to rotate, and the second stirring shaft drives the negative rotating spiral blade to rotate.

[0036] Specifically, the power assembly includes a power motor 37, a drive 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 horizontally positioned at the rear left end of the first stirring drum 5 and mounted on the frame 1. The output shaft of the power motor 37 extends to the left and is connected to the drive pulley 17. The first driven pulley 18 is mounted at the left end of the first stirring shaft 13 and is connected to the drive pulley 17 via the first transmission belt 20. The second driven pulley 19 is mounted at the left end of the second stirring shaft 15 and is connected to the first driven pulley 18 via the second transmission belt 21. During operation, the power motor drives the drive pulley to rotate, which in turn drives the first driven pulley to rotate via the first transmission belt. The first driven pulley drives the first stirring shaft to rotate, and simultaneously, the first driven pulley drives the second driven pulley to rotate via the second transmission belt, which in turn drives the second stirring shaft to rotate.

[0037] In this embodiment, the gas channel 36 is coaxially arranged in the middle of the second stirring shaft 15. An air inlet 22, connected to the gas channel 36, is opened at the left end of the second stirring shaft 15. The air inlet 22 is used to connect to a CO2 delivery pipe (not shown in the figure). The CO2 delivery pipe can be connected to a CO2 pump, allowing CO2 from industrial waste gas to be injected into the gas channel during use. Multiple air outlets are opened on the circumferential side of the shaft section inside the second stirring drum 9. These outlets are evenly spaced along the axial direction of the second stirring shaft 15, and each outlet consists of multiple air outlets 12 evenly distributed circumferentially around the axis of the second stirring shaft 15. During operation, the CO2 delivery pipe is connected to the air inlet at the left end of the second stirring shaft via a rotary joint, and CO2 is fed into the gas channel through the CO2 delivery pipe. The CO2 then enters the interior of the second stirring drum from the air outlets. By designing multiple evenly distributed CO2 vents on the second stirring shaft, the gas can be made to contact the slurry efficiently and evenly, optimizing the mineralization reaction effect. At the same time, the structure is robust, has good corrosion resistance, and can adapt to complex working conditions.

[0038] In this embodiment, the heating assembly includes a pair of connecting flanges 23 rotatably fitted onto the left and right ends of the second stirring shaft 15. A plurality of circumferentially distributed heating rods 24 are fixed between the pair of connecting flanges 23. The heating rods 24 are arranged laterally and are used to heat the interior of the second stirring drum. It should be noted that a heating assembly can also be installed inside the first stirring drum. The specific structure of the heating assembly inside the first stirring drum is the same as that inside the second stirring drum, and will not be repeated here.

[0039] In this embodiment, the temperature detection device is a temperature sensor 25 located on the connecting flange 24 at the left end of the second stirring shaft 15, which monitors the internal temperature of the second stirring drum in real time. The pressure detection device is a pressure sensor 26 located on the connecting flange 24 at the left end of the second stirring shaft 15, which monitors pressure changes in real time to prevent overpressure accidents. The pressure sensor and temperature sensor are distributed vertically. The CO2 concentration detection device is a CO2 concentration sensor 27 located on the connecting flange 24 at the right end of the second stirring shaft 15, which detects the CO2 gas concentration inside the second stirring drum to ensure maximum gas utilization, avoid waste, and optimize the efficiency of the mineralization reaction. The temperature sensor, pressure sensor, CO2 concentration sensor, and heating rod are all electrically connected to the control unit, which can be a PLC. The temperature sensor monitors the temperature inside the second stirring drum in real time, while the heating rod provides precise heat regulation to ensure that the mineralization reaction takes place within the optimal temperature range. The pressure sensor monitors the pressure inside the second stirring drum to ensure safe operation of the equipment. The CO2 concentration sensor optimizes the injection and recycling rate of gas, reducing resource waste. All data is aggregated through the control unit, allowing operators to monitor the equipment status in real time and dynamically adjust operating parameters as needed.

[0040] In this embodiment, the first stirring shaft 13 is fixed with several cross-shaped first support frames 28 at intervals along the axial direction, and the positive rotating spiral blade 14 is installed on several first support frames 28, that is: the first stirring shaft, the first support frame and the positive rotating spiral blade are connected as a whole.

[0041] In this embodiment, the second stirring shaft 15 is fixed with several cross-shaped second support frames 29 at intervals along the axial direction, and the anti-rotating spiral blade 16 is installed on several second support frames 29, that is, the second stirring shaft, the second support frames and the anti-rotating spiral blade are connected as a whole.

[0042] In this embodiment, the left and right ends of the first stirring drum 5 are open, the right end of the first stirring drum 5 is the first feed inlet, and a feed hopper 30 is provided at the lower end of the first feed inlet to facilitate feeding.

[0043] In this embodiment, the left and right ends of the second stirring drum 9 are closed, and a discharge hopper 31 is provided below the second discharge port to facilitate discharge.

[0044] In this embodiment, a sealing plate 32 can be detachably installed at both the second inlet and the second outlet, and the sealing plate is used for sealing.

[0045] In this embodiment, the frame 1 is provided with a protective cover 33 covering the first stirring drum.

[0046] In this embodiment, the hopper is a funnel-shaped device to ensure smooth slurry flow, reduce blockage, and thus reduce manual intervention.

[0047] In this embodiment, both the first and second mixing drums are made of high-strength wear-resistant materials, and the inner walls are treated with anti-adhesion to prevent slurry residue and facilitate cleaning.

[0048] In this embodiment, both ends of the first stirring shaft extend out of the first stirring cylinder and are connected to the bearing 38 mounted on the frame; both ends of the second stirring shaft extend out of the second stirring cylinder and are connected to the bearing mounted on the frame.

[0049] In another embodiment, the outer peripheral surfaces of the first stirring drum 5 and the second stirring drum 9 are each provided with a plurality of gear rings 34 at intervals along the axial direction. Each gear ring 34 meshes with a pair of front- and rear-distributed drive gears 35. The drive gears are mounted on the frame, and one of the drive gears is connected to a drive motor (not shown in the figure). By providing gear rings and drive gears on the outside of the first and second stirring drums, the operation is such that the drive motor drives the drive gears to rotate, the drive gears drive the gear rings to rotate, and the gear rings drive the corresponding stirring drums to rotate. That is, the stirring drums and the internal agitators can rotate independently, and the rotation directions of the stirring drums and the internal agitators can be the same or opposite. By designing the stirring drums to be rotatable as well, the agitators cooperate with the stirring drums to further improve the stirring effect. It should be noted that whether the stirring drums rotate or not can be selected as needed.

[0050] When using this device:

[0051] 1. Preparation: Before using the equipment, prepare the raw materials needed for concrete production (cement, aggregate, water, etc.) and weigh them according to the mixing ratio. The equipment operator must check the motor, mixer, sensors, and sealing system to ensure all components are in good condition and clean without residue. Simultaneously, confirm that the CO2 gas reserve is sufficient and set key parameters such as mixing speed, temperature control range, and gas injection volume to meet specific production needs.

[0052] 2. Raw Material Feeding and Mixing: Raw materials are sequentially fed into the first mixing drum through the feeding hopper to ensure uniform feeding and avoid excessive feeding at one time, which would reduce mixing efficiency. After starting the spiral mixer, the equipment efficiently mixes the raw materials at a set speed.

[0053] 3. Slurry Conveying: The mixed slurry flows naturally through the hopper to the second mixing drum of the lower module. Because the slurry is conveyed by gravity, the equipment eliminates the need for complex mechanical transmission structures, thus reducing energy consumption and preventing material residue or secondary contamination during transport, thereby improving overall work efficiency.

[0054] 4. CO2 Injection and Mineralization Reaction: After the slurry enters the lower module, CO2 gas is uniformly injected through the air inlet at the left end of the second stirring shaft, and the counter-spiral stirrer is started. The counter-spiral stirrer rotates at low speed to ensure full contact between the gas and the slurry. The temperature inside the second stirring drum is monitored in real time, and the reaction temperature is maintained within the optimal range using heating rods. At the same time, the pressure sensor dynamically adjusts the pressure to ensure stable reaction conditions. During this process, CO2 reacts with calcium ions in the slurry to form calcium carbonate crystals, significantly improving the performance of concrete and achieving the carbon sequestration target.

[0055] 5. Slurry discharge: After the mineralization reaction is completed, the slurry is discharged smoothly through the discharge hopper for subsequent curing or direct casting.

[0056] 6. Equipment Cleaning and Maintenance: After each use, key components such as the mixing drum, feed hopper, and discharge hopper should be cleaned promptly to prevent hardened slurry residue from affecting normal equipment operation. Regularly inspect components such as sensors, bearings, and seals to ensure stable performance of all functional modules. Maintenance work should include lubricating transmission components and replacing worn seals to extend equipment lifespan and maintain efficient operation.

[0057] The purpose of this device:

[0058] 1. Efficient mixing and mineralization reaction in concrete production

[0059] The equipment is used in the production of building materials to uniformly mix concrete raw materials (cement, aggregates, and water, etc.) and perform carbon dioxide mineralization reactions. Through a high-efficiency mixer and precise gas injection, it improves the uniformity and stability of concrete, while simultaneously converting CO2 into calcium carbonate crystals, thereby enhancing the material's compressive strength and durability.

[0060] 2. Preparation of low-carbon and environmentally friendly building materials

[0061] The equipment injects CO2 from industrial waste gas into concrete slurry, solidifies it into part of the concrete structure, realizes carbon capture and utilization (CCU), reduces carbon emissions, and helps the production of green building materials. It is suitable for the mass production and innovative application of low-carbon and environmentally friendly building materials.

[0062] 3. Production of high-strength, high-durability concrete

[0063] It is suitable for the production of concrete products with high requirements for mechanical properties and durability, such as components in critical engineering projects like bridges, high-rise buildings, and infrastructure. The mineralization reaction further enhances the crack resistance and erosion resistance of concrete.

[0064] 4. Manufacturing of special-purpose building components

[0065] Used to produce special building components with requirements for frost resistance, sulfate erosion resistance and high density, such as underground tunnels, marine structures and concrete products used in special environments, to meet special needs under different working conditions;

[0066] 5. Experimental equipment used in scientific research and development

[0067] The equipment is suitable for building materials research institutions and university laboratories. As an experimental device for developing new low-carbon concrete or studying CO2 mineralization mechanisms, it provides controllable temperature, pressure and gas concentration adjustment, which facilitates data acquisition and analysis.

[0068] 6. Industrial application of carbon reduction technologies in the construction industry

[0069] As an advanced low-carbon production technology and 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.

[0070] The advantages of this invention are:

[0071] 1. High-efficiency mixing and improved uniformity

[0072] The equipment adopts a dual-stirrer design with both positive and negative spirals to ensure that concrete raw materials are fully mixed in a short time. During the mixing process, material stratification and uneven particle distribution are avoided. It is especially suitable for formulations with high water content or complex aggregate ratios, providing a uniform and stable slurry for subsequent mineralization reactions and improving product quality.

[0073] 2. Precision mineralization and concrete performance optimization

[0074] By uniformly injecting CO2 gas into the second stirring shaft, and combining low-speed stirring with precise temperature control, the gas and slurry are fully contacted, thus 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 significantly improves the compressive strength, crack resistance and durability of the concrete, meeting the requirements of high-standard buildings.

[0075] 3. Intelligent control and efficient operation

[0076] Equipped with temperature, pressure, and CO2 concentration sensors and a PLC intelligent control system, it enables real-time monitoring and dynamic adjustment of operating parameters, ensuring safe operation of the equipment under complex working conditions.

[0077] 4. Split design and ease of maintenance

[0078] The upper and lower layered split design divides the functions such as stirring, mineralization reaction, and power transmission into separate zones. They operate independently but work closely together. This structure not only facilitates transportation and installation but also makes daily maintenance and component replacement easier, reducing downtime and improving equipment utilization.

[0079] If this invention discloses or relates to components or structural parts that are fixedly connected to each other, then, unless otherwise stated, a fixed connection can be understood as: a fixed connection that can be detached (e.g., using bolts or screws), or a fixed connection that cannot be detached (e.g., riveting, welding). Of course, a fixed connection can also be replaced by an integral structure (e.g., manufactured in one piece using a casting process) (except where it is obviously impossible to use an integral molding process).

[0080] In addition, unless otherwise stated, the terms used in any of the technical solutions disclosed in this invention to indicate positional relationships or shapes include states or shapes that are similar to, close to, or approximate with those states or shapes.

[0081] Any component provided by this invention can be assembled from multiple individual components or can be a single component manufactured by a one-piece molding process.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the present invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. A split type concrete mixing and CO2 mineralization apparatus, characterized by: The application relates to a double-layer module for mixing concrete raw materials, which comprises an upper layer module for mixing the concrete raw materials and a lower layer module for mineralization reaction below the upper layer module, wherein the upper layer module comprises a first mixing cylinder internally provided with a positive screw mixer, the right end of the first mixing cylinder is provided with a first feeding port, and the left end of the first mixing cylinder is provided with a first discharging port; the lower layer module comprises a second mixing cylinder internally provided with a reverse screw mixer, the top of the left end of the second mixing cylinder is provided with a second feeding port, and the bottom of the right end of the second mixing cylinder is provided with a second discharging port; a discharging hopper is arranged between the first discharging port and the second feeding port; a gas channel for facilitating CO2 flow is arranged in the middle of the reverse screw mixer, the gas channel is communicated with the inside of the second mixing cylinder through a gas outlet arranged in the side wall of the gas channel, and the gas outlet facilitates the entry of CO2 into the second mixing cylinder; the inside of the second mixing cylinder is further provided with a heating assembly, a temperature detecting element, a CO2 concentration detecting element and a pressure detecting element. The first mixing cylinder is horizontally arranged, the positive screw mixer comprises a first mixing rotating shaft coaxially arranged with the first mixing cylinder, and a positive rotating spiral blade is sleeved on the first mixing rotating shaft; the second mixing cylinder is horizontally arranged, the reverse screw mixer comprises a second mixing rotating shaft coaxially arranged with the second mixing cylinder, and a reverse rotating spiral blade is sleeved on the second mixing rotating shaft; the first mixing rotating shaft and the second mixing rotating shaft are driven to synchronously rotate by a power assembly. The power assembly comprises 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 left end of the back side of the first mixing cylinder, the output shaft of the power motor is connected with the driving pulley, the first driven pulley is mounted at the left end of the first mixing rotating shaft, and the first driven pulley is connected with the driving pulley through the first transmission belt; the second driven pulley is mounted at the left end of the second mixing rotating shaft, and the second driven pulley is connected with the first driven pulley through the second transmission belt. The gas channel is coaxially arranged in the middle of the second mixing rotating shaft, the left end of the second mixing rotating shaft is provided with an air inlet communicated with the gas channel, the air inlet is used for being connected with a CO2 conveying pipe, a plurality of air outlets are arranged on the circumferential side of the shaft section of the second mixing rotating shaft in the second mixing cylinder, the air outlets are evenly distributed along the axial direction of the second mixing rotating shaft, and each air outlet is composed of a plurality of air outlets which are evenly distributed in a circle around the axis of the second mixing rotating shaft. The heating assembly comprises a pair of connecting flanges which are rotatably sleeved on the left and right ends of the second mixing rotating shaft, a plurality of heating rods which are evenly distributed in a circle are fixed between the pair of connecting flanges, and the heating rods are horizontally arranged.

2. Split concrete mixing and CO2 mineralization apparatus according to claim 1, characterized in that: The temperature detecting element is a temperature sensor arranged on the connecting flange at the left end of the second mixing rotating shaft; the pressure detecting element is a pressure sensor arranged on the connecting flange at the left end of the second mixing rotating shaft; the CO2 concentration detecting element is a CO2 concentration detecting sensor arranged on the connecting flange at the right end of the second mixing rotating shaft; and the temperature sensor, the pressure sensor, the CO2 concentration detecting sensor and the heating rods are electrically connected with a control unit.

3. The split concrete mixing and CO2 mineralization apparatus of claim 1, wherein: The first stirring shaft is fixed with a plurality of cross-shaped first support frames at intervals along the axial direction, and the positive rotation spiral blade is installed on the first support frames.

4. The split concrete mixing and CO2 mineralization apparatus of claim 1, wherein: The left and right ends of the first stirring cylinder are both open, the right end of the first stirring cylinder is a first feeding port, and the lower end of the first feeding port is provided with a feeding hopper; the left and right ends of the second stirring cylinder are both closed, and a discharging hopper is arranged below the second discharging port; the second feeding port and the second discharging port are both provided with a detachable sealing plate.

5. The split concrete mixing and CO2 mineralization apparatus of claim 1, wherein: The upper layer module and the lower layer module are both installed on the rack, and the rack is provided with a protective cover covering the first stirring cylinder.

6. The split concrete mixing and CO2 mineralization apparatus of claim 1, wherein: The outer circumferential side of the first stirring cylinder and the second stirring cylinder is provided with a plurality of gear rings at intervals along the axial direction, and each gear ring is engaged with a pair of front and rear distributed driving gears, and one of the driving gears is connected with the driving motor.

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