Microorganism carbon sequestration reinforced recycled aggregate device with stirring function

Abstract

This utility model discloses a microbial carbon fixation enhanced recycled aggregate device with stirring function, including an air inlet device, a liquid inlet device, a reaction vessel body, and a collection device. The air inlet device includes a vacuum pump and a carbon dioxide cylinder, with an inlet pipe connected to the carbon dioxide cylinder. The inlet pipe is equipped with a thickened valve, a valve handwheel, a pressure gauge, and an inlet valve. The vacuum pump is connected to the side of the reaction vessel body via a flange. Thus, the heating furnace performs a carbonization reaction by mixing microbial slurry, calcium source solution, and recycled aggregate in the reaction vessel. The recycled aggregate is placed in the reaction vessel, and the device controller controls the introduction of carbon dioxide, the spraying of the solution, and the stirring of the recycled aggregate within the reaction vessel. After carbonization, the aggregate enters the aggregate collection area. This device achieves more uniform carbonization of the recycled aggregate, improves the modification effect of microbial enhanced recycled aggregate, and is suitable for enhancing recycled aggregate with carbon-fixing bacteria.

Description

Technical Field

[0001] This utility model relates to the technical field of carbonization reaction equipment, and in particular to a microbial carbon fixation and enhanced regenerated aggregate device with stirring function. Background Technology

[0002] The shortage and rising costs of building materials have driven the development of recycled concrete technology, which uses recycled concrete to prepare recycled aggregates to replace natural aggregates, effectively reducing resource waste and alleviating the pressure of waste disposal.

[0003] Recycled aggregates often exhibit poor performance due to residual cement mortar and cracks on their surface, resulting in recycled concrete with lower mechanical and durability properties compared to ordinary concrete. Traditional strengthening methods to improve these properties primarily include physical and chemical means such as grinding, ultrasonic cleaning, and soaking. While these methods can improve aggregate quality to some extent, they are complex, energy-intensive, and costly, limiting their widespread application. In contrast, utilizing carbon-fixing microorganisms to generate inorganic compounds such as calcium carbonate further enhances the overall performance of recycled aggregates while simultaneously fixing a significant amount of carbon.

[0004] The use of microbial mineralization to fix carbon through biochemical processes and simultaneously enhance material properties has attracted researchers' attention. However, current microbial enhancement technologies suffer from problems such as low efficiency, difficulty in control, and a lack of significant synergistic effect between carbon fixation and material enhancement. Furthermore, existing microbial mineralization equipment typically cannot achieve efficient carbon source supply, uniform mixing of microbial solutions, calcium source solutions, and aggregates on an industrial scale, nor can it provide sufficient ease of operation, which limits its wider application. Utility Model Content

[0005] This utility model aims to at least partially solve one of the technical problems in the related art.

[0006] Therefore, the purpose of this utility model is to propose a microbial carbon fixation and regenerated aggregate strengthening device with stirring function. The heating furnace mixes microbial slurry, calcium source solution and regenerated aggregate in a reaction vessel to carry out carbonization reaction. The regenerated aggregate is placed in the reaction vessel. The device controller controls the introduction of carbon dioxide, the spraying of solution and the stirring of regenerated aggregate in the reaction vessel. After carbonization, the aggregate enters the aggregate collection. This device achieves more uniform carbonization of regenerated aggregate, improves the modification effect of microbial strengthening of regenerated aggregate, and is suitable for strengthening regenerated aggregate with carbon-fixing bacteria.

[0007] To achieve the above objectives, this utility model proposes a microbial carbon fixation enhanced regenerated aggregate device with stirring function, comprising an air inlet device, a liquid inlet device, a reaction vessel body, and a collection device. The air inlet device includes a vacuum pump and a carbon dioxide cylinder, with an air inlet pipe connected to the carbon dioxide cylinder. The air inlet pipe is equipped with a thickened valve, a valve handwheel, a pressure gauge, and an air inlet valve. The vacuum pump is connected to the side of the reaction vessel body via a flange. The liquid inlet device includes a solution tank, a water pump, a spiral nozzle, a liquid inlet pipe, and a waste liquid collection pipe. The solution tank is connected to... The inlet pipe is connected to the water pump, the water pump is connected to the spiral nozzle, the solution tank is connected to the reactor body through the waste liquid collection pipe, and the waste liquid collection pipe is equipped with a filter plate to block aggregate; the reactor body includes a device controller, a cover bolt, a reactor cover, a handle, a stirring blade, and an aggregate support frame, the stirring blade is located in the lower middle part of the reactor body, and the aggregate support frame is a telescopic structure installed inside the reactor body; the collection device includes an aggregate collection trough and an aggregate channel connected to the bottom of the reactor body.

[0008] This invention relates to a microbial carbon fixation and regenerated aggregate strengthening device with a stirring function. The heating furnace mixes microbial slurry, calcium source solution and regenerated aggregate in a reaction vessel for carbonization reaction. The regenerated aggregate is placed in the reaction vessel, and the device controller controls the introduction of carbon dioxide, the spraying of solution and the stirring of regenerated aggregate in the reaction vessel. After carbonization, the aggregate enters the aggregate collection. This device achieves more uniform carbonization of regenerated aggregate, improves the modification effect of microbial strengthening of regenerated aggregate, and is suitable for strengthening regenerated aggregate with carbon-fixing bacteria.

[0009] In addition, the microbial carbon fixation enhanced recycled aggregate device with stirring function proposed in the above application may also have the following additional technical features:

[0010] Specifically, the reactor body has a diameter of 1 meter and a height of 0.8 meters, and the bottom of the reactor is designed as a hemispherical cylinder with a height of 0.15 meters.

[0011] Specifically, the stirring blade is a double-layered stirring blade, located in the lower part of the reaction vessel body, and the distance between the stirring blade and the vessel wall is less than 10mm.

[0012] Specifically, the aggregate support frame is a telescopic structure controlled by the device controller, and the bottom of the aggregate support frame has an opening with a diameter smaller than the particle size of the recycled aggregate.

[0013] Specifically, the reactor body and the reactor cover are sealed by a gasket or by the conical surface of the reactor body and the spherical surface of the reactor cover, and the seal is achieved by tightening the nuts with flange bolts evenly spaced axially.

[0014] Specifically, the solution tank is designed to be divided into sections to store the microbial solution and the calcium source solution separately.

[0015] Specifically, a safety valve is provided on the reactor body, and the spiral nozzle is installed on the top of the reactor body.

[0016] Specifically, the device controller is used to centrally process data, monitor and regulate key parameters such as temperature, pressure, spray volume, gas concentration, and stirring rate.

[0017] Specifically, the waste liquid collection pipe is equipped with a recovery valve, which is used to control the recycling of microbial solution and calcium source solution.

[0018] The advantages of this invention compared to existing technologies are as follows:

[0019] (1) The reaction process is precisely controlled by the device controller to ensure that the recycled aggregate can be uniformly carbonized in the reactor, thereby improving the carbonization effect.

[0020] (2) The combination of microbial slurry and calcium source solution was used to carry out carbonization reaction with recycled aggregate, which significantly enhanced the strengthening and modification effect of microorganisms on recycled aggregate.

[0021] (3) This device is particularly suitable for strengthening recycled aggregates by using carbon-fixing bacteria, thus expanding the technical means of modifying recycled aggregates.

[0022] (4) The automatic control of steps such as carbon dioxide introduction, solution spraying, and aggregate mixing is achieved through the device controller, which improves the efficiency and accuracy of operation.

[0023] (5) After carbonization, the aggregate can be easily collected into the collection system, which facilitates subsequent processing and utilization and improves the overall production efficiency.

[0024] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0025] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which:

[0026] Figure 1 This is a schematic diagram of a microbial carbon fixation and enhanced regenerated aggregate device with stirring function according to an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the solution tank and solution pipeline of a microbial carbon fixation enhanced regenerated aggregate device with stirring function according to an embodiment of the present invention.

[0028] As shown in the figure: 1. Spiral nozzle; 2. Safety valve; 3. Air inlet valve; 4. Pressure gauge; 5. Valve handwheel; 6. Thickened valve; 7. Cover bolt; 8. Kettle lid; 9. Handle; 10. Carbon dioxide cylinder; 11. Device controller; 12. Liquid inlet pipe; 13. Water pump; 14. Stirring blade; 15. Waste liquid collection pipe; 16. Aggregate collection tank; 17. Solution tank; 18. Air inlet pipe; 19. Aggregate channel; 20. Aggregate support frame; 21. Reactor body; 22. Vacuum pump; 23. Recovery valve. Detailed Implementation

[0029] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. Rather, the embodiments of the present invention include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0030] The following description, in conjunction with the accompanying drawings, describes an embodiment of the present invention of a microbial carbon fixation and enhanced regenerated aggregate device with a stirring function.

[0031] like Figures 1-2 As shown in the figure, a microbial carbon fixation enhanced regenerated aggregate device with stirring function according to an embodiment of the present invention includes an air inlet device, a liquid inlet device, a reaction vessel body 21, and a collection device. The air inlet device includes a vacuum pump 22 and a carbon dioxide cylinder 10, with an air inlet pipe 18 connected to the carbon dioxide cylinder 10. The air inlet pipe 18 is equipped with a thickened valve 6, a valve handwheel 5, a pressure gauge 4, and an air inlet valve 3. The vacuum pump 22 is connected to the side of the reaction vessel body 21 via a flange. The liquid inlet device includes a solution tank 17, a water pump 13, a spiral nozzle 1, a liquid inlet pipe 12, and a waste liquid collection pipe 15. 7 is connected to the water pump 13 through the liquid inlet pipe 12, and the water pump 13 is connected to the spiral nozzle 1. The solution tank 17 is connected to the reactor body 21 through the waste liquid collection pipe 15. The waste liquid collection pipe is equipped with a filter plate to block the aggregate. The reactor body 21 includes a device controller 11, a cover bolt 7, a reactor cover 8, a handle 9, a stirring blade 14, and an aggregate support frame 20. The stirring blade 14 is located in the middle and lower part of the reactor body 21. The aggregate support frame 20 is a telescopic structure and is installed inside the reactor body 21. The collection device includes an aggregate collection tank 16 and an aggregate channel 19 connected to the bottom of the reactor body 21.

[0032] Among these, the intake device is understandable:

[0033] Carbon dioxide cylinder 10: serves as a carbon source, providing carbon dioxide gas.

[0034] Inlet pipe 18: Connects carbon dioxide cylinder 10 to reactor body 21, used to introduce carbon dioxide gas into the reactor.

[0035] Thickened valve 6: Installed on the air inlet pipe 18, used to control the amount of carbon dioxide gas entering the pipe, ensuring a stable and safe gas flow.

[0036] Valve handwheel 5: Used for manually adjusting the opening of the thickened valve 6, facilitating precise control of gas flow.

[0037] Pressure gauge 4: Monitors the gas pressure in the intake pipe 18 in real time to ensure that the gas pressure is within a safe range.

[0038] Intake valve 3: As the main control valve of intake pipe 18, it is used to open or close the intake of carbon dioxide gas.

[0039] Vacuum pump 22: It is connected to the side of the reactor body 21 via a flange and is used to perform vacuum pretreatment on the aggregate before mineralization, so that the reactor body is in a negative pressure state, which makes it easier for carbon dioxide gas to enter the pores and cracks of the recycled aggregate.

[0040] Liquid inlet device:

[0041] Solution tank 17: Stores microbial solution and calcium source solution separately, with the two solutions prevented from mixing by a separation design.

[0042] Pump 13: Provides power to pump the solution in solution tank 17 into reaction vessel 21.

[0043] Spiral nozzle 1: Installed on the top of the reactor body 21, it evenly sprays the solution delivered by the water pump 13 onto the recycled aggregate.

[0044] Liquid inlet pipe 12: connects solution tank 17 and water pump 13, used to transport solution.

[0045] Waste liquid collection pipe 15: Connects the reactor body 21 and the solution tank 17, used to recover unused solution. The waste liquid collection pipe is equipped with a filter plate to block aggregate and prevent aggregate from entering the waste liquid collection system.

[0046] Reactor body 21:

[0047] The device controller 11 has centralized processing capabilities, enabling it to perform data acquisition, analysis, and feedback tasks, automatically optimize parameter settings, and improve carbonization reaction efficiency. Simultaneously, it possesses intelligent monitoring and control functions, real-time adjusting and monitoring key parameters such as temperature, pressure, spray volume, gas concentration, and stirring rate.

[0048] Cover bolt 7: Used to tightly connect the lid 8 to the reactor body 21 to ensure airtightness during the reaction process.

[0049] The vessel lid 8 covers the top of the reactor body 21 and works with the lid bolts 7 to achieve a seal. A safety valve 2 is installed on the lid to automatically release pressure in case of excessive pressure, ensuring safety.

[0050] Handle 9: Allows the operator to manually open or close the lid 8.

[0051] Stirring blade 14: Located in the lower middle part of the reactor body 21, its rotation speed and direction are controlled by the device controller 11 to ensure that the recycled aggregate is mixed evenly with the solution and to prevent aggregate accumulation from causing incomplete reaction.

[0052] Aggregate support frame 20: This is a retractable structure installed inside the reactor body 21 to support the recycled aggregate. The bottom of the aggregate support frame 20 has an opening, the diameter of which is smaller than the particle size of the recycled aggregate, to prevent aggregate from falling off. Simultaneously, it allows the waste liquid generated after spraying to flow into the collection tank, and finally discharged into the waste liquid bucket through the waste liquid pipe. After carbonization is completed, the support frame is extended or retracted by the controller, allowing the aggregate to enter the aggregate collection tank 16.

[0053] Collection device:

[0054] Aggregate collection tank 16: Used to collect recycled aggregate after carbonization.

[0055] Aggregate channel 19: connects the bottom of the reactor body 21 to the aggregate collection tank 16, so as to facilitate the smooth discharge of carbonized aggregate.

[0056] In summary, the microbial carbon fixation and enhanced regenerated aggregate device with stirring function of this utility model achieves uniform carbonization of regenerated aggregate through a carefully designed air inlet device, liquid inlet device, reaction vessel 21 and collection device, thereby improving the modification effect of microbial enhanced regenerated aggregate. It is suitable for enhancing regenerated aggregate with carbon-fixing bacteria.

[0057] In one embodiment of this utility model, such as Figures 1-2 As shown, the reactor body 21 has a diameter of 1 meter and a height of 0.8 meters. The bottom of the reactor is designed as a hemispherical cylinder with a height of 0.15 meters.

[0058] It is understandable that the reactor body 21 has a diameter of 1 meter. This size design can accommodate an appropriate amount of recycled aggregate, ensuring that the carbonization reaction can proceed fully. At the same time, the moderate diameter also facilitates the uniform distribution of gas and the spraying effect of the solution.

[0059] The reactor body 21 has a height of 0.8 meters. This height design ensures sufficient reaction space and facilitates observation and operation by the operator.

[0060] The reactor bottom is designed as a hemispherical cylinder, a special design that offers multiple advantages. The hemispherical cylinder can effectively disperse and withstand the pressure generated during the reaction process, improving the overall strength and stability of the reactor body 21.

[0061] The hemispherical section has a height of 0.15 meters. This design ensures that the bottom of the reactor has sufficient volume to accommodate and support the recycled aggregate, while also facilitating the discharge of waste liquid and the collection of aggregate. At the same time, the hemispherical shape also promotes uniform gas distribution and effective solution spraying, improving the uniformity and efficiency of the carbonization reaction.

[0062] In one embodiment of this utility model, such as Figures 1-2 As shown, the stirring blade 14 is a double-layered stirring blade, located in the lower part of the reaction vessel body 21, and the distance between the stirring blade 14 and the vessel wall is less than 10mm.

[0063] It is understandable that the stirring blade 14 adopts a double-layer blade design, a special design that can significantly improve stirring efficiency and mixing uniformity. The double-layer blades can generate stronger shear force and vortex effect when rotating, allowing the recycled aggregate to be mixed more thoroughly with the solution, thereby improving the efficiency and uniformity of the carbonization reaction.

[0064] The double-layer blade design can also reduce energy consumption and noise during the stirring process, and improve the overall performance of the device.

[0065] The stirring blade 14 is located in the lower middle part of the reactor body 21. This position design ensures that the stirring blade 14 can fully stir every corner of the reactor body 21 when rotating, avoiding dead corners and accumulation.

[0066] The distance between the stirring blade 14 and the vessel wall is less than 10mm. This design ensures that the stirring blade 14 can closely adhere to the vessel wall when rotating, further reducing dead zones and improving mixing uniformity. At the same time, it also prevents recycled aggregate from accumulating near the vessel wall, which would affect the carbonization reaction.

[0067] In one embodiment of this utility model, such as Figures 1-2 As shown, the aggregate support frame 20 is a telescopic structure controlled by the device controller 11. The bottom of the aggregate support frame 20 has an opening with a diameter smaller than the particle size of the recycled aggregate.

[0068] It is understandable that the aggregate support frame 20 adopts a telescopic structure design, which can flexibly adapt to the processing needs of different batches of recycled aggregate. By adjusting the height of the aggregate support frame 20, it can be ensured that the recycled aggregate maintains an appropriate stacking height during the reaction process, neither increasing the difficulty of mixing due to excessive stacking nor reducing the reaction space due to excessive stacking.

[0069] The retractable structure of the aggregate support frame 20 is precisely controlled by the device controller 11. The device controller 11 can automatically adjust the height of the aggregate support frame 20 according to a preset program or according to the real-time monitoring of the accumulation of recycled aggregate in the reactor body 21, so as to ensure the stability and efficiency of the reaction process.

[0070] The bottom of the aggregate support frame 20 has openings, the diameter of which is smaller than the particle size of the recycled aggregate. This design ensures that the waste liquid generated after spraying can flow smoothly to the collection tank and finally be discharged to the waste liquid bucket through the waste liquid pipe, without mixing with the recycled aggregate.

[0071] The perforated design also promotes uniform gas distribution and flow, improving the efficiency and uniformity of the carbonization reaction. Simultaneously, because the pore size is smaller than the particle size of the recycled aggregate, it effectively prevents the recycled aggregate from falling off the aggregate support frame 20, ensuring the smooth progress of the reaction process.

[0072] In one embodiment of this utility model, such as Figures 1-2 As shown, the reactor body 21 and the reactor cover 8 are sealed by a gasket or by the conical surface of the reactor body and the spherical surface of the reactor cover, and the seal is achieved by tightening the nuts with the flange axially uniform cover bolts 7.

[0073] It is understood that the reactor body 21 and the lid 8 are sealed using either a gasket or a spherical seal between the conical surface of the reactor body and the spherical surface of the lid. The gasket seal involves placing one or more gaskets between the contact surfaces of the lid and the reactor body; when the lid 8 and the reactor body are tightly fitted, the gaskets are compressed, thus achieving a seal. The spherical seal between the conical surface of the reactor body and the lid 8 utilizes the geometry of both surfaces to achieve a tight fit and seal. Both sealing methods offer high sealing performance and reliability.

[0074] Regardless of the sealing method used, a uniformly spaced axially spaced set of cover bolts 7 is required to ensure a tight seal. These cover bolts 7 are evenly distributed on the flange surfaces of the vessel cover and body. Tightening the nuts secures the vessel cover 8 to the vessel body. During tightening, the cover bolts 7 generate an axial preload, creating sufficient pressure on the sealing surfaces between the vessel cover 8 and the vessel body, thus achieving a seal.

[0075] By employing a gasket or a spherical seal between the conical surface of the reactor body and the spherical surface of the reactor lid, combined with the axially uniform tightening of the flange bolts 7, the sealing performance between the reactor body 21 and the reactor lid 8 can be ensured. During the reaction process, even if the internal pressure increases, it can ensure that there is no gas leakage and no solution splashing, thereby ensuring the safety and efficiency of the reaction.

[0076] During operation, it is necessary to regularly check the tightness of the cover bolts 7 and tighten them promptly. At the same time, it is also necessary to check the wear of the gaskets or sealing surfaces; if wear is found, they should be replaced immediately. These measures ensure that the sealing performance between the reactor body 21 and the cover 8 remains in good condition at all times.

[0077] In one embodiment of this utility model, such as Figures 1-2 As shown, the solution tank 17 is designed to be divided into sections to store the microbial solution and the calcium source solution separately.

[0078] It is understood that the solution tank 17 is designed as two independent chambers, one for storing the microbial solution and the other for storing the calcium source solution. This separate design ensures that the two solutions do not mix during storage and transportation, avoiding possible chemical reactions or contamination, thereby guaranteeing the accuracy and stability of the carbonization reaction.

[0079] Due to the segmented design of the solution tank 17, the two solutions can be controlled and adjusted independently. For example, parameters such as the supply volume, supply rate, and supply time of the microbial solution and the calcium source solution can be adjusted separately according to the needs of the carbonization reaction to achieve the best reaction effect.

[0080] The two chambers of the solution tank 17 are connected to the spiral nozzle 1 or other supply device via pipes to achieve solution transportation and spraying. During transportation, the flow rate and pressure of the solution can be adjusted by control devices such as pumps and valves to meet the needs of the carbonization reaction.

[0081] In one embodiment of this utility model, such as Figures 1-2 As shown, a safety valve 2 is provided on the reactor body 21, and a spiral nozzle 1 is installed on the top of the reactor body 21.

[0082] It is understood that the reactor body 21 is equipped with a safety valve 2. This is to ensure that when the internal pressure exceeds the preset safety value during the reaction process, the safety valve 2 can automatically open to release the excess pressure, thereby preventing the reactor from exploding or other safety accidents due to excessive pressure.

[0083] The spiral nozzle 1 is installed on the top of the reactor body 21 to spray the microbial solution and calcium source solution evenly onto the recycled aggregate inside the reactor in an atomized form.

[0084] The spiral nozzle 1 is designed to produce a rotating spray effect, which allows the solution to cover the surface of the recycled aggregate more evenly, thereby improving the efficiency and uniformity of the carbonization reaction.

[0085] The spiral nozzle 1 and solution tank 17, along with other components, are connected by pipes to form a complete solution delivery and spraying system. During the reaction, the solution supply and spraying speed can be adjusted as needed to meet the requirements of the carbonization reaction.

[0086] In one embodiment of this utility model, such as Figures 1-2 As shown, the device controller 11 is used to centrally process data, monitor and regulate key parameters such as temperature, pressure, spray volume, gas concentration, and stirring rate.

[0087] It is understood that the device controller 11 possesses powerful data processing capabilities, enabling it to receive and process data from various sensors (such as temperature sensors, pressure sensors, and gas concentration sensors) in real time. This data reflects key parameters within the reactor, such as temperature, pressure, and gas concentration, and serves as crucial information for assessing the reaction progress and adjusting operating parameters.

[0088] The device controller 11 can monitor key parameters such as temperature, pressure, spray volume, gas concentration, and stirring rate inside the reactor in real time. By comparing preset thresholds and reaction models, the device controller 11 can accurately determine the reaction status, promptly detect and handle abnormal situations, and ensure the safe conduct of the reaction.

[0089] Based on real-time monitored data, the device controller 11 can automatically adjust the operating parameters inside the reactor, such as the spray volume and stirring rate, to optimize reaction conditions and improve carbonization efficiency. Simultaneously, the device controller 11 can also regulate the temperature inside the reactor by controlling components such as heating elements and cooling devices, ensuring the reaction proceeds within the optimal temperature range.

[0090] When a parameter inside the reactor exceeds the preset range or a malfunction occurs, the device controller 11 can immediately issue an alarm signal and display fault information, allowing operators to take timely measures to handle the situation. Simultaneously, the device controller 11 also provides fault diagnosis functions to help operators quickly locate and resolve problems.

[0091] In one embodiment of this utility model, such as Figures 1-2 As shown, a recovery valve 23 is installed on the waste liquid collection pipe 15. The recovery valve 23 is used to control the recycling of microbial solution and calcium source solution.

[0092] It is understood that the waste liquid collection pipe 15 is located below or on the side of the reaction vessel 21 to collect the waste liquid generated after the reaction is completed. This waste liquid may contain incompletely reacted microbial solutions, calcium source solutions, and by-products generated during the reaction.

[0093] The design of the waste liquid collection pipe 15 should ensure that the waste liquid can flow out smoothly, avoiding problems such as blockage or leakage. At the same time, the material of the waste liquid collection pipe 15 should be corrosion-resistant and high-temperature resistant to adapt to the corrosive substances and high-temperature environment that may be generated during the reaction process.

[0094] The recovery valve 23 is installed on the waste liquid collection pipe 15 to control the recycling of waste liquid. By adjusting the opening of the recovery valve 23, the flow rate and direction of the waste liquid can be precisely controlled, thereby realizing the recycling or discharge of waste liquid.

[0095] By controlling the recovery valve 23, the microbial solution and calcium source solution can be recycled. After the reaction is completed, if the concentration of microbial solution and calcium source solution in the waste liquid is still high, it can be returned to the solution tank 17 or other storage container by adjusting the recovery valve 23 for subsequent reuse.

[0096] Recycling not only reduces production costs but also minimizes environmental impact. By recycling useful components from wastewater, we can reduce the consumption of raw materials and the discharge of waste, thereby achieving resource recycling and sustainable environmental development.

[0097] It should be noted that the control method of this application can be automatically controlled by a controller. The control method of the controller can be implemented by simple programming by those skilled in the art, which is common knowledge in the field. Furthermore, this application is mainly used to protect mechanical structures, so the control method and circuit connection will not be explained in detail here.

[0098] Operation procedure of microbial carbon fixation and enhanced recycled aggregate device with stirring function:

[0099] I. Preparatory Work

[0100] Step 1.1: Check that all equipment components are intact, especially the reactor body 21, reactor lid 8, lid bolts 7, safety valve 2, spiral nozzle 1, solution tank 17, water pump 13, and air intake device (including carbon dioxide cylinder 10, air intake pipe 18 and related valves).

[0101] Step 1.2: Ensure that the inside of the reactor body 21 is clean and free of impurities, and that the aggregate support frame 20 is in its initial state (i.e., not extended or preset at the required height).

[0102] Step 1.3: Add appropriate amounts of microbial solution and calcium source solution to the two independent chambers of solution tank 17 respectively. The concentration of the microbial solution should be selected between 0.9 and 2.3 OD600, and the concentration of the calcium source solution should be between 0.1 and 3 mol / L. Ensure that solution tank 17 is well sealed.

[0103] II. Assembly and Sealing of the Reactor Body

[0104] Step 2.1: Place the recycled aggregate evenly on the aggregate support frame 20 and adjust the height of the aggregate support frame 20 to accommodate the amount of aggregate.

[0105] Step 2.2: Gently place the lid 8 on top of the reactor body 21, ensuring that the lid and the flange face of the reactor body are aligned.

[0106] Step 2.3: Tighten all the cover bolts 7 evenly until the specified preload is reached to ensure the seal between the vessel body and the cover.

[0107] Step 2.4: Check whether safety valve 2 is in normal working condition and ensure that it can open automatically when the pressure is too high.

[0108] III. Air Intake and Vacuuming

[0109] Step 3.1: Close the air inlet valve 3, turn on the vacuum pump 22, and perform vacuum pretreatment on the reactor body 21 until the predetermined negative pressure state is reached.

[0110] Step 3.2: Turn off vacuum pump 22, slowly open inlet valve 3, adjust thickened valve 6 and valve handwheel 5, and control the amount of carbon dioxide gas introduced according to the pressure gauge 4, so that the pressure inside the reactor is kept within a safe range that is conducive to carbonization.

[0111] IV. Solution Spraying and Stirring

[0112] Step 4.1: Start the water pump 13 to evenly spray the microbial solution (including but not limited to solutions of carbonic anhydrase-producing bacteria such as Bacillus mucilaginosus and Bacillus alkalophilus) and calcium source solution (including but not limited to solutions of calcium chloride and calcium lactate) from the solution tank 17 onto the recycled aggregate through the inlet pipe 12 and the spiral nozzle 1. The spraying pressure should be controlled between 0.1 and 0.7 MPa.

[0113] Step 4.2: Set the rotation speed and direction of the stirring blade 14 through the device controller 11, start the stirring device, and ensure that the recycled aggregate and solution are fully mixed.

[0114] Step 4.3: During the spraying and stirring process, the temperature inside the reactor should be controlled between 20℃ and 40℃. Based on the real-time monitoring data from the device controller 11, parameters such as spraying volume and stirring rate should be adjusted in a timely manner to optimize the carbonization reaction conditions.

[0115] V. Carbonization Reaction and Monitoring

[0116] Step 5.1: During the carbonization reaction, the device controller 11 continuously monitors key parameters such as temperature, pressure (the carbonization pressure should be maintained between 0 and 0.5 MPa), and gas concentration, and automatically adjusts the operating parameters according to the preset threshold to ensure that the reaction is carried out under safe and efficient conditions.

[0117] Step 5.2: Operators need to regularly observe the reaction inside the reactor 21. If any abnormality is found, the reaction should be stopped immediately and appropriate measures should be taken.

[0118] VI. Waste Liquid Recycling and Discharge

[0119] Step 6.1: After the reaction is completed, close all liquid and gas inlet devices. After the pressure inside the reactor body 21 drops to a safe range, open the recovery valve 23 on the waste liquid collection pipe 15 to recover the waste liquid into the solution tank 17 or other storage container (if the waste liquid concentration is low, it can be directly discharged into the wastewater treatment system).

[0120] Step 6.2: If necessary, reprocess or store the recovered microbial solution and calcium source solution for later use.

[0121] VII. Opening of the vessel and collection of aggregates

[0122] Step 7.1: After the pressure inside the reactor body 21 has been completely released, loosen the lid bolt 7 and remove the lid 8.

[0123] Step 7.2: Adjust the height of the aggregate support frame 20 so that the recycled aggregate falls into the aggregate channel 19 and slides smoothly into the aggregate collection trough 16.

[0124] Step 7.3: Collect the recycled aggregate after carbonization for further processing or storage.

[0125] VIII. Equipment Cleaning and Maintenance

[0126] Step 8.1: Clean the residue on the reactor body 21, reactor cover 8, spiral nozzle 1, liquid inlet pipe 12 and other components to ensure the equipment is clean.

[0127] Step 8.2: Inspect all parts for wear and tear. If any parts are damaged or severely worn, they should be replaced or repaired promptly.

[0128] Step 8.3: Periodically calibrate the device controller 11 and related sensors to ensure their accuracy and reliability.

[0129] In summary, this utility model provides a microbial carbon fixation and regenerated aggregate strengthening device with stirring function. The heating furnace mixes microbial slurry, calcium source solution, and regenerated aggregate in a reaction vessel for carbonization. The regenerated aggregate is placed in the reaction vessel, and the device controller controls the introduction of carbon dioxide, the spraying of the solution, and the stirring of the regenerated aggregate. After carbonization, the aggregate enters the aggregate collection. This device achieves more uniform carbonization of the regenerated aggregate, improves the modification effect of microbial strengthening of regenerated aggregate, and is suitable for strengthening regenerated aggregate with carbon-fixing bacteria.

[0130] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0131] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0132] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A device for carbonation of microorganisms with the function of stirring and strengthening the recycled aggregate, characterized by, It includes an air inlet device, a liquid inlet device, a reaction vessel body (21), and a collection device, wherein, The air intake device includes a vacuum pump (22) and a carbon dioxide cylinder (10), and an air intake pipe (18) connected to the carbon dioxide cylinder (10). The air intake pipe (18) is equipped with a thickened valve (6), a valve handwheel (5), a pressure gauge (4) and an air intake valve (3). The vacuum pump (22) is connected to the side of the reactor body (21) through a flange. The liquid inlet device includes a solution tank (17), a water pump (13), a spiral nozzle (1), an inlet pipe (12), and a waste liquid collection pipe (15). The solution tank (17) is connected to the water pump (13) through the inlet pipe (12), and the water pump (13) is connected to the spiral nozzle (1). The solution tank (17) is connected to the reactor body (21) through the waste liquid collection pipe (15). The waste liquid collection pipe is equipped with a filter plate to block aggregate. The reactor body (21) includes a device controller (11), a cover bolt (7), a reactor cover (8), a handle (9), a stirring blade (14), and an aggregate support frame (20). The stirring blade (14) is located in the lower middle part of the reactor body (21), and the aggregate support frame (20) is a telescopic structure and is installed inside the reactor body (21). The collection device includes an aggregate collection tank (16) and an aggregate channel (19) connected to the bottom of the reactor body (21).

2. The microbial carbon fixation and enhanced regenerated aggregate device with stirring function according to claim 1, characterized in that, The reactor body (21) has a diameter of 1 meter and a height of 0.8 meters. The bottom of the reactor is designed as a hemispherical cylinder with a height of 0.15 meters.

3. The device for carbon sequestration and reinforced recycled aggregate with stirring function according to claim 1, characterized in that, The stirring blade (14) is a double-layered stirring blade, located in the lower part of the reaction vessel body (21), and the distance between the stirring blade (14) and the vessel wall is less than 10 mm.

4. The device for carbon sequestration and reinforced recycled aggregate with stirring function according to claim 1, characterized in that, The aggregate support frame (20) is a telescopic structure and is controlled by the device controller (11). The bottom of the aggregate support frame (20) has an opening with a diameter smaller than the particle size of the recycled aggregate.

5. The device for carbon sequestration and reinforced recycled aggregate with stirring function according to claim 1, characterized in that, The reactor body (21) and the reactor cover (8) are sealed by a gasket or by the conical surface of the reactor body and the spherical line of the reactor cover, and the seal is achieved by tightening the nuts with the flange axially uniform cover bolts (7).

6. The device for carbon sequestration and reinforced recycled aggregate with stirring function according to claim 1, characterized in that, The solution tank (17) is designed to be divided into sections to store the microbial solution and the calcium source solution respectively.

7. The device for carbon sequestration and reinforced regeneration aggregate with stirring function according to claim 1, characterized in that, The reactor body (21) is equipped with a safety valve (2), and the spiral nozzle (1) is installed on the top of the reactor body (21). 8.The device for carbon sequestration and reinforced recycled aggregate with stirring function according to claim 1, characterized in that, The device controller (11) is used to centrally process data, monitor and regulate key parameters such as temperature, pressure, spray volume, gas concentration and stirring rate. 9.The device for carbon sequestration and reinforced recycled aggregate with stirring function according to claim 1, characterized in that, The waste liquid collection pipe (15) is equipped with a recycling valve (23), which is used to control the recycling of microbial solution and calcium source solution.

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