Method and device for sealing and storing high-alkalinity residues for capturing carbon dioxide

Abstract

The invention relates to the technical field of environmental engineering, and particularly discloses a method and device for sealing and storing high-alkalinity residues for capturing carbon dioxide, and the method comprises the following steps: S1, capturing carbon dioxide: capturing carbon dioxide from air by adopting an efficient adsorbent, the adsorbent is selected from one or more combinations of a carbon-based nano material (such as a carbon nano tube and graphene), a molecular sieve, a metal organic framework material (MOFs), a porous organic polymer (POPs) and an electrified adsorbent; s2, pretreatment of high-alkalinity residues: screening the residues with high-alkalinity characteristics as a basic material of concrete, and carrying out necessary pretreatment on the high-alkalinity residues; according to the invention, the high-efficiency adsorbent is utilized to capture carbon dioxide from air, and the carbon dioxide and high-alkalinity residues are mixed and reacted to prepare the concrete, so that long-term storage of carbon dioxide is realized, greenhouse gas emission is effectively reduced, and the cured concrete has excellent mechanical properties and durability, and has relatively high economic value and social benefit.

Description

Technical Field

[0001] The invention belongs to the technical field of environmental engineering, and in particular relates to a method and device for sealing high-alkalinity residues captured from carbon dioxide. Background Art

[0002] Carbon capture and storage technology is a technical means to reduce greenhouse gas emissions, including three main links: carbon dioxide capture, transportation and storage. This method captures carbon dioxide produced by industrial emission sources (such as coal-fired power plants, cement plants, etc.) and safely seals it underground to reduce pollution to the atmospheric environment. The method and device for capturing high-alkalinity residues of carbon dioxide is an important part of this technical system.

[0003] In the Chinese patent with publication number CN112505040B, a carbon dioxide storage measurement system and measurement method based on filling paste is mentioned, including a filling paste selection experimental device for screening the most suitable filling paste ratio, a filling part, a carbon dioxide capture and liquefaction part, a goaf, solid coal, a computer system, a water source tap, a digital speckle monitoring device, a transmission pipeline, a mining optical cable and a hose. The present invention uses a filling paste with a suitable ratio as a storage carrier, and fills the liquefied supercritical carbon dioxide into the filling paste. Under the action of pressure, the underground storage of carbon dioxide can be achieved, and the length, width and height of the filling body can be controlled. It can realize the pressurization of the filling paste in the goaf and the online remote monitoring of the pressure, and can realize the remote online monitoring of the pressure, carbon dioxide reserves, filling body quality, strength, deformation and carbon dioxide reserves.

[0004] However, the above technical solution uses a filling paste with a suitable ratio as a storage carrier and fills the liquefied supercritical carbon dioxide into the filling paste. Under the action of pressure, the underground storage of carbon dioxide can be achieved. However, the production cost of the paste is high, and leakage is likely to occur during the adding process, resulting in poor use of the device. Therefore, the staff needs to improve it. Summary of the invention

[0005] The object of the present invention is to provide a method and device for sealing high-alkalinity residues of captured carbon dioxide to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A method for capturing high-alkalinity residues of carbon dioxide and storing the residues comprises the following steps:

[0008] S1. Carbon dioxide capture: Carbon dioxide is captured from the air using a highly efficient adsorbent, the adsorbent being selected from one or a combination of carbon-based nanomaterials (such as carbon nanotubes and graphene), molecular sieves, metal organic framework materials (MOFs), porous organic polymers (POPs) and charged adsorbents;

[0009] S2. Pretreatment of high alkalinity residues: Screening residues with high alkalinity characteristics as the basic material of concrete, and performing necessary pretreatment on the high alkalinity residues, including but not limited to drying, crushing, and screening;

[0010] S3, CO2 and residue mixing reaction: the captured CO2 is mixed with high alkalinity residue in gaseous or liquid form, and the CO2 is fixed in the residue through chemical reaction;

[0011] S4. Concrete preparation and curing: The high alkalinity residue mixed with carbon dioxide is mixed with water, aggregates and additives to prepare concrete. During the concrete curing process, the carbon dioxide further reacts with the high alkalinity components to form a stable carbonate and bicarbonate compound to achieve long-term storage;

[0012] S5. Storage stability assessment: Conduct stability assessment on the cured concrete to detect the storage efficiency and long-term stability of CO2. Use one of the following methods: X-ray diffraction and infrared spectroscopy to characterize and test the concrete to ensure effective storage of CO2.

[0013] S6. Concrete application and disposal: Concrete that has undergone stability assessment shall be used in construction, road and bridge projects, and safely disposed of as a sealing medium for specific geological strata to ensure that no harm is caused to the environment and human health during the concrete application process.

[0014] Preferably, in step S1, the adsorbent is preferably a charged adsorbent.

[0015] Preferably, in step S2, the high basicity residue pretreatment further comprises adjusting the pH value and particle size distribution of the residue.

[0016] Preferably, in step S3, the mixing reaction is carried out under one of pressurization and decompression to promote a full reaction of carbon dioxide and the residue.

[0017] Preferably, in step S5, the stability assessment further includes conducting a long-term exposure test and an accelerated aging test on the concrete to assess its storage stability and durability under different environmental conditions.

[0018] A device for capturing high-alkalinity residues of carbon dioxide and sealing it, comprising:

[0019] Mounting bracket;

[0020] A processing box is fixedly connected to one side of the top of the mounting bracket, an assembly frame is fixedly connected to one side of the top of the processing box, connection boxes are fixedly connected to both sides of the inner wall of the assembly frame, and a collection pipe is fixedly connected to the middle of the surface of the connection box;

[0021] A filter screen is fixedly connected to one side of the inner wall of the collection tube, a first drive motor is fixedly connected to one side of the inner wall of the collection tube, a drive rod is installed at the output end of the first drive motor, a fan blade is fixedly connected to one side of the surface of the drive rod, a collection plate is fixedly connected to one side of the inner wall of the connection box, a discharge pipe is fixedly connected to the middle of the back side of the connection box, connection holes are opened on both sides of the top of the processing box, and the top of the connection hole is fixedly connected to the bottom of the collection plate.

[0022] Preferably, a mounting plate is fixedly connected to one side of the inner wall of the processing box, a heating tube is fixedly connected to one side of the surface of the mounting plate, an exhaust pipe is fixedly connected to one side of the surface of the heating tube, and an electric valve is rotatably connected to one side of the inner wall of the exhaust pipe.

[0023] Preferably, one side of the bottom of the mounting bracket is fixedly connected to a mounting platform, one side of the top of the mounting platform is fixedly connected to a mixing tank, and one side of the top of the mixing tank is fixedly connected to the bottom end of the exhaust pipe, the middle part of the top of the mixing tank is fixedly connected to a protective box, one side of the inner wall of the protective box is fixedly connected to a second drive motor, the output end of the second drive motor is installed with a transmission rod, the bottom end of the transmission rod is fixedly connected to a stirring rod, one side of the surface of the stirring rod is fixedly connected to a plurality of stirring blades, one side of the surface of the stirring blade is fixedly connected to a scraper, and one side of the scraper surface overlaps the inner wall of the mixing tank, one side of the top of the mixing tank is fixedly connected to a feeding pipe, the middle part of the bottom of the mixing tank is fixedly connected to a discharge pipe, one side of the inner bottom wall of the mixing tank is fixedly connected to a servo motor, the output end of the servo motor is installed with a movable rod, the top of the movable rod is fixedly connected to a sealing plate, and one side of the surface of the sealing plate is plugged into the inner wall of the discharge pipe.

[0024] Preferably, a controller is fixedly connected to the other side of the top of the mounting platform, a control panel is electrically connected to one side of the surface of the controller, support frames are fixedly connected to the four sides of the bottom of the mounting platform, and a fixed base plate is fixedly connected to the bottom end of the support frame.

[0025] Preferably, both sides of the inner wall of the fixed bottom plate are provided with plugging holes, one side of the inner wall of the plugging hole is plugged with a plugging rod, one end of the plugging rod is fixedly connected to the mold box, and one side of the mold box surface is plugged into the inner wall of the fixed bottom plate.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] (1) By using high-efficiency adsorbents to capture carbon dioxide from the air and mixing it with high-alkalinity residues to prepare concrete, long-term storage of carbon dioxide is achieved, effectively reducing greenhouse gas emissions. The solidified concrete has excellent mechanical properties and durability and can be widely used in construction, roads, bridges and other fields, with high economic value and social benefits.

[0028] (2) Through the arrangement of the connection box, the collection tube, the fan blades, the collection plate, the heating tube, the exhaust pipe and the electric valve, when in use, the surface of the connection box absorbs air through the collection tube, the surface of the collection tube filters dust through the filter, the rotation of the fan blades generates suction to inhale the air outside the collection tube, the air inside the connection box is captured by the adsorbent inside the collection plate to capture carbon dioxide, the carbon dioxide is discharged into the interior of the processing box through the connection hole, the heating tube heats and regenerates the carbon dioxide, and then the carbon dioxide is discharged into the mixing tank through the exhaust pipe, and the exhaust pipe is opened and closed by the electric valve, thereby achieving the effect of facilitating the adsorption, collection and processing of carbon dioxide in the air, and facilitating the operation of the staff.

[0029] (3) Through the arrangement of a mixing tank, stirring blades, a scraper, a discharge pipe and a sealing plate, when in use, the stirring rod drives the multiple stirring blades on the surface to rotate, and the stirring blades mix the various materials in the mixing tank with the carbon dioxide. The scraper is used on one side of the stirring blade to clean the adhesive on the inner wall of the mixing tank. After the mixing is completed, the materials are discharged into the mold box through the discharge pipe. The sealing plate controls the opening and closing of the discharge pipe, thereby achieving the effect of conveniently mixing the carbon dioxide and the cement mixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a process diagram of the method of the present invention;

[0031] Figure 2 One of the three-dimensional diagrams of the present invention;

[0032] Figure 3 A three-dimensional diagram of a capture plate of the present invention;

[0033] Figure 4 A three-dimensional diagram of a stirring blade of the present invention;

[0034] Figure 5 This is the second stereogram of the present invention;

[0035] Figure 6 A three-dimensional diagram of the mold box of the present invention;

[0036] In the figure: 1. mounting bracket; 2. processing box; 3. assembly frame; 4. connection box; 5. collection pipe; 6. filter screen; 7. first drive motor; 8. drive rod; 9. fan blade; 10. collection plate; 11. discharge pipe; 12. connection hole; 13. mounting plate; 14. heating pipe; 15. exhaust pipe; 16. electric valve; 17. mounting platform; 18. mixing tank; 19. protection box; 20. second drive motor; 21. transmission rod; 22. stirring rod; 23. stirring blade; 24. scraper; 25. feeding pipe; 26. discharge pipe; 27. servo motor; 28. movable rod; 29. ​​sealing plate; 30. controller; 31. control panel; 32. support frame; 33. fixed bottom plate; 34. plug hole; 35. plug rod; 36. mold box. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Embodiment 1:

[0039] See also Figure 1 As shown, a method for capturing high-alkalinity residue of carbon dioxide for storage comprises the following steps:

[0040] S1. Carbon dioxide capture: Carbon dioxide is captured from the air using a highly efficient adsorbent, the adsorbent being selected from one or a combination of carbon-based nanomaterials (such as carbon nanotubes and graphene), molecular sieves, metal organic framework materials (MOFs), porous organic polymers (POPs) and charged adsorbents;

[0041] S2. Pretreatment of high alkalinity residues: Screening residues with high alkalinity characteristics as the basic material of concrete, and performing necessary pretreatment on the high alkalinity residues, including but not limited to drying, crushing, and screening;

[0042] S3, CO2 and residue mixing reaction: the captured CO2 is mixed with high alkalinity residue in gaseous or liquid form, and the CO2 is fixed in the residue through chemical reaction;

[0043] S4. Concrete preparation and curing: The high alkalinity residue mixed with carbon dioxide is mixed with water, aggregates and additives to prepare concrete. During the concrete curing process, the carbon dioxide further reacts with the high alkalinity components to form a stable carbonate and bicarbonate compound to achieve long-term storage;

[0044] S5. Storage stability assessment: Conduct stability assessment on the cured concrete to detect the storage efficiency and long-term stability of CO2. Use one of the following methods: X-ray diffraction and infrared spectroscopy to characterize and test the concrete to ensure effective storage of CO2.

[0045] S6. Concrete application and disposal: Concrete that has undergone stability assessment shall be used in construction, road and bridge projects, and safely disposed of as a sealing medium for specific geological strata to ensure that no harm is caused to the environment and human health during the concrete application process.

[0046] In step S1, a high-efficiency adsorbent is used to capture carbon dioxide from the air. The adsorbent is selected from one or more combinations of activated carbon, molecular sieves, metal organic framework materials and charged adsorbents. The adsorbent is preferably a charged adsorbent to improve the capture efficiency.

[0047] In step S2, residues with high alkalinity characteristics are screened as the basic material of concrete, and the high alkalinity residues are subjected to necessary pretreatment, including but not limited to drying, crushing, screening, and adjusting the pH value and particle size distribution of the residues. The pretreated high alkalinity residues serve as a sealing medium and have high reactivity and stability.

[0048] In step S3, the captured carbon dioxide is mixed with the high alkalinity residue in gaseous or liquid form. During the mixing process, the carbon dioxide is fixed in the residue through chemical reaction to form a stable compound. The mixing reaction is carried out under pressurized or reduced pressure conditions to promote the full reaction of the carbon dioxide and the residue.

[0049] In step S4, the high-alkalinity residue mixed with carbon dioxide is mixed with water, aggregates and additives to prepare concrete. During the concrete curing process, the carbon dioxide further reacts with the high-alkalinity components to generate stable carbonates or bicarbonates to achieve long-term storage. The cured concrete has excellent mechanical properties and durability.

[0050] In step S5, the cured concrete is subjected to stability assessment, including long-term exposure test and accelerated aging test, to evaluate its storage stability and durability under different environmental conditions.

[0051] In step S6, the concrete that has undergone stability assessment is applied to the fields of construction, road, bridge engineering, etc., and is safely disposed of as a sealing medium for specific geological layers to ensure that no harm is caused to the environment and human health during the application of the concrete.

[0052] Embodiment 2:

[0053] See also Figures 2 to 6 As shown, a device for capturing high alkalinity residues of carbon dioxide for storage comprises:

[0054] Mounting bracket 1;

[0055] A processing box 2 is fixedly connected to one side of the top of the mounting bracket 1, an assembly frame 3 is fixedly connected to one side of the top of the processing box 2, a connection box 4 is fixedly connected to both sides of the inner wall of the assembly frame 3, and a collection pipe 5 is fixedly connected to the middle of the surface of the connection box 4;

[0056] A filter screen 6 is fixedly connected to one side of the inner wall of the collection tube 5, a first drive motor 7 is fixedly connected to one side of the inner wall of the collection tube 5, a drive rod 8 is installed at the output end of the first drive motor 7, a fan blade 9 is fixedly connected to one side of the surface of the drive rod 8, a collection plate 10 is fixedly connected to one side of the inner wall of the connection box 4, a discharge pipe 11 is fixedly connected to the middle of the back side of the connection box 4, connection holes 12 are provided on both sides of the top of the processing box 2, and the top of the connection hole 12 is fixedly connected to the bottom of the collection plate 10, a mounting plate 13 is fixedly connected to one side of the inner wall of the processing box 2, a heating pipe 14 is fixedly connected to one side of the surface of the mounting plate 13, an exhaust pipe 15 is fixedly connected to one side of the surface of the heating pipe 14, and an electric valve 16 is rotatably connected to one side of the inner wall of the exhaust pipe 15.

[0057] When in use, an assembly frame 3 is arranged on the top of the mounting bracket 1 through the processing box 2, and connecting boxes 4 are arranged on both sides of the inner wall of the assembly frame 3. The surface of the connecting box 4 absorbs air through the collection pipe 5, and the surface of the collection pipe 5 filters dust through the filter 6, and a first driving motor 7 is arranged on the inner wall of the collection pipe 5. The staff connects the first driving motor 7 to the power supply, and the output end of the first driving motor 7 drives the driving rod 8 to rotate, and the driving rod 8 drives the fan blades 9 on the surface to rotate. The rotation of the fan blades 9 generates suction to inhale the air outside the collection pipe 5. The air inside the connecting box 4 captures carbon dioxide through the adsorbent inside the capture plate 10, and the carbon dioxide is discharged into the processing box 2 through the connecting hole 12. A heating pipe 14 is arranged inside the processing box 2 through the mounting plate 13. The staff connects the heating pipe 14 to the power supply, and the heating pipe 14 heats and regenerates the carbon dioxide, and then discharges the carbon dioxide into the mixing tank 18 through the exhaust pipe 15, and the exhaust pipe 15 is opened and closed by the electric valve 16.

[0058] Embodiment three:

[0059] See also Figures 2 to 6As shown, one side of the bottom of the mounting bracket 1 is fixedly connected to a mounting platform 17, one side of the top of the mounting platform 17 is fixedly connected to a mixing tank 18, and one side of the top of the mixing tank 18 is fixedly connected to the bottom end of the exhaust pipe 15, a protective box 19 is fixedly connected to the middle of the top of the mixing tank 18, and one side of the inner wall of the protective box 19 is fixedly connected to a second drive motor 20, a transmission rod 21 is installed at the output end of the second drive motor 20, and a stirring rod 22 is fixedly connected to the bottom end of the transmission rod 21, and a plurality of stirring blades 23 are fixedly connected to one side of the surface of the stirring rod 22, and a scraper 24 is fixedly connected to one side of the surface of the stirring blade 23, and one side of the surface of the scraper 24 is overlapped with the inner wall of the mixing tank 18, a feeding pipe 25 is fixedly connected to one side of the top of the mixing tank 18, and an outlet pipe 26 is fixedly connected to the middle of the bottom of the mixing tank 18. A servo motor 27 is fixedly connected to one side of the inner bottom wall of the material pipe 26 and the mixing tank 18, and a movable rod 28 is installed at the output end of the servo motor 27. A sealing plate 29 is fixedly connected to the top of the movable rod 28, and one side of the surface of the sealing plate 29 is plugged into the inner wall of the discharge pipe 26. A controller 30 is fixedly connected to the other side of the top of the mounting platform 17, and one side of the surface of the controller 30 is electrically connected to a control panel 31. Support frames 32 are fixedly connected to the four sides of the bottom of the mounting platform 17, and a fixed bottom plate 33 is fixedly connected to the bottom end of the support frame 32. Plug holes 34 are opened on both sides of the inner wall of the fixed bottom plate 33, and a plug rod 35 is plugged into one side of the inner wall of the plug hole 34. One end of the plug rod 35 is fixedly connected to a mold box 36, and one side of the surface of the mold box 36 is plugged into the inner wall of the fixed bottom plate 33.

[0060] When in use, a second drive motor 20 is arranged at the top of the mixing tank 18 through the protective box 19. The staff connects the second drive motor 20 to the power supply, and the output end of the second drive motor 20 drives the transmission rod 21 to rotate, and the transmission rod 21 drives the stirring rod 22 at the bottom to rotate, and the stirring rod 22 drives multiple stirring blades 23 on the surface to rotate, and the stirring blades 23 mix the various materials inside the mixing tank 18 with carbon dioxide, and the scraper 24 is used on one side of the stirring blades 23 to clean the adhesive on the inner wall of the mixing tank 18, and after the mixing is completed, it is discharged into the mold box 36 through the discharge pipe 26, and a servo motor 27 is arranged on the inner bottom wall of the mixing tank 18. The staff connects the servo motor 27 to the power supply, and the output end of the servo motor 27 drives the movable rod 28 to rotate, and the movable rod 28 drives the sealing plate 29 at the top to rotate, and the sealing plate 29 controls the opening and closing of the discharge pipe 26.

[0061] Embodiment 4:

[0062] See also Figures 1 to 6As shown, carbon dioxide is captured from the air by a highly efficient adsorbent and mixed with high alkalinity residues, and the carbon dioxide is fixed in the residues through chemical reactions, and finally a concrete with a stable storage effect is prepared. This method not only reduces greenhouse gas emissions, but also realizes the resource utilization of waste.

[0063] CO2 capture stage

[0064] Equipment composition: This stage mainly uses the processing box on the top of the mounting bracket and the connection box, collection tube and other components in the assembly frame. The inner wall of the collection tube is provided with a filter screen and a first drive motor, which drives the fan blades to rotate to generate suction and suck air into the collection tube.

[0065] Working process: The carbon dioxide in the air passes through the filter in the capture tube to filter out dust and then enters the connection box. The capture plate in the connection box is equipped with high-efficiency adsorbents (such as carbon-based nanomaterials (such as carbon nanotubes and graphene), molecular sieves, metal organic framework materials (MOFs), porous organic polymers (POPs) or charged adsorbents, etc.), which can adsorb carbon dioxide in the air. The adsorbed carbon dioxide is discharged into the processing box through the connection hole, and the heating tube heats and regenerates the carbon dioxide to improve the adsorption efficiency. The treated carbon dioxide is discharged into the subsequent mixing stage through the exhaust pipe.

[0066] High alkalinity residue pretreatment stage

[0067] Pretreatment step: Screening residues with high alkalinity characteristics, such as industrial waste residues, as the base material of concrete. The residues are subjected to necessary pretreatment, including drying, crushing, screening and other steps, to adjust their pH value and particle size distribution, and prepare for the subsequent mixing reaction.

[0068] Carbon dioxide and residue mixed reaction stage

[0069] Equipment composition: The mixing tank is the core equipment of this stage, equipped with a stirring system (including stirring rod, stirring blades and scrapers) and a sealing plate controlled by a servo motor.

[0070] Mixing process: Add the pretreated high alkalinity residue into the mixing tank through the feeding pipe, and open the exhaust pipe to pass the captured carbon dioxide into the mixing tank. The second drive motor drives the stirring rod and stirring blades to rotate, so that the carbon dioxide and the residue are fully mixed, and the chemical reaction is promoted under pressurized or decompressed conditions. The carbon dioxide is fixed in the residue through chemical reactions to form a stable compound.

[0071] Concrete preparation and curing stage

[0072] Mixing material: The high alkalinity residue mixed with carbon dioxide is mixed with water, aggregate and additives in proportion to prepare concrete.

[0073] Curing process: During the concrete curing process, carbon dioxide further reacts with high alkalinity components to form stable carbonate or bicarbonate compounds, achieving long-term storage of carbon dioxide.

[0074] Storage stability assessment stage

[0075] Evaluation method: The stability of the cured concrete is evaluated, including long-term exposure tests and accelerated aging tests, to evaluate its sealing stability and durability under different environmental conditions.

[0076] Concrete application and handling phase

[0077] Application areas: Concrete that has undergone stability assessment is used in the fields of construction, road and bridge engineering, or is safely disposed of as a sealing medium for specific geological formations.

[0078] Safety assurance: Ensure that there is no harm to the environment and human health during the concrete application process.

[0079] Working principle: When in use, the surface of the collection tube 5 filters dust through the filter 6, and a first drive motor 7 is provided on the inner wall of the collection tube 5. The staff connects the first drive motor 7 to the power supply, and the output end of the first drive motor 7 drives the drive rod 8 to rotate, and the drive rod 8 drives the fan blades 9 on the surface to rotate. The rotation of the fan blades 9 generates suction to inhale the air outside the collection tube 5. The air captures carbon dioxide through the adsorbent inside the collection plate 10 inside the connection box 4, and the carbon dioxide is discharged into the processing box 2 through the connection hole 12. The staff connects the heating tube 14 to the power supply, and the heating tube 14 heats and regenerates the carbon dioxide, and then discharges the carbon dioxide into the mixing tank 18 through the exhaust pipe 15, and the exhaust pipe 15 passes through the electric valve 1 6 Control opening and closing, the staff connects the second drive motor 20 to the power supply, the output end of the second drive motor 20 drives the transmission rod 21 to rotate, the transmission rod 21 drives the stirring rod 22 at the bottom to rotate, the stirring rod 22 drives the multiple stirring blades 23 on the surface to rotate, the stirring blade 23 mixes the various materials in the mixing tank 18 with the carbon dioxide, and the scraper 24 is used on one side of the stirring blade 23 to clean the adhesive on the inner wall of the mixing tank 18, and after the mixing is completed, it is discharged into the mold box 36 through the discharge pipe 26, the staff connects the servo motor 27 to the power supply, the output end of the servo motor 27 drives the movable rod 28 to rotate, the movable rod 28 drives the sealing plate 29 at the top to rotate, and the sealing plate 29 controls the opening and closing of the discharge pipe 26.

[0080] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for capturing high-alkalinity residues of carbon dioxide for storage, characterized in that: The following steps are involved: S1. Carbon dioxide capture: Carbon dioxide is captured from the air using a highly efficient adsorbent, the adsorbent being selected from one or a combination of carbon-based nanomaterials (such as carbon nanotubes and graphene), molecular sieves, metal organic framework materials (MOFs), porous organic polymers (POPs) and charged adsorbents; S2. Pretreatment of high alkalinity residues: Screening residues with high alkalinity characteristics as the basic material of concrete, and performing necessary pretreatment on the high alkalinity residues, including but not limited to drying, crushing, and screening; S3, CO2 and residue mixing reaction: the captured CO2 is mixed with high alkalinity residue in gaseous or liquid form, and the CO2 is fixed in the residue through chemical reaction; S4. Concrete preparation and curing: The high alkalinity residue mixed with carbon dioxide is mixed with water, aggregates and additives to prepare concrete. During the concrete curing process, the carbon dioxide further reacts with the high alkalinity components to form a stable carbonate and bicarbonate compound to achieve long-term storage; S5. Storage stability assessment: Conduct stability assessment on the cured concrete to detect the storage efficiency and long-term stability of CO2. Use one of the following methods: X-ray diffraction and infrared spectroscopy to characterize and test the concrete to ensure effective storage of CO2. S6. Concrete application and disposal: Concrete that has undergone stability assessment shall be used in construction, road and bridge projects, and safely disposed of as a sealing medium for specific geological strata to ensure that no harm is caused to the environment and human health during the concrete application process.

2. A method for storing high-basicity residues from captured carbon dioxide according to claim 1, characterized in that: In step S1, the adsorbent is preferably a charged adsorbent.

3. A method for storing high-alkalinity residues from captured carbon dioxide according to claim 1, characterized in that: In step S2, the high basicity residue pretreatment further includes adjusting the pH value and particle size distribution of the residue.

4. A method for storing high-alkalinity residues from captured carbon dioxide according to claim 1, characterized in that: In step S3, the mixing reaction is carried out under one of a pressurized condition and a depressurized condition to promote a sufficient reaction between the carbon dioxide and the residue.

5. The method for storing high-basicity residues from captured carbon dioxide according to claim 1, characterized in that: In step S5, the stability assessment also includes conducting a long-term exposure test and an accelerated aging test on the concrete to assess its storage stability and durability under different environmental conditions.

6. A device for storing high-alkalinity residues for capturing carbon dioxide, applicable to the method for storing high-alkalinity residues for capturing carbon dioxide according to claims 1 to 5, characterized in that: include: Mounting bracket (1); A processing box (2) is fixedly connected to one side of the top of the mounting bracket (1), an assembly frame (3) is fixedly connected to one side of the top of the processing box (2), a connection box (4) is fixedly connected to both sides of the inner wall of the assembly frame (3), and a collection pipe (5) is fixedly connected to the middle of the surface of the connection box (4); A filter screen (6) is fixedly connected to one side of the inner wall of the collection pipe (5), a first drive motor (7) is fixedly connected to one side of the inner wall of the collection pipe (5), a drive rod (8) is installed at the output end of the first drive motor (7), a fan blade (9) is fixedly connected to one side of the surface of the drive rod (8), a collection plate (10) is fixedly connected to one side of the inner wall of the connection box (4), a discharge pipe (11) is fixedly connected to the middle of the back side of the connection box (4), and connection holes (12) are provided on both sides of the top of the processing box (2), and the top of the connection hole (12) is fixedly connected to the bottom of the collection plate (10).

7. The device for storing high-alkalinity residue for capturing carbon dioxide according to claim 6, characterized in that: A mounting plate (13) is fixedly connected to one side of the inner wall of the processing box (2), a heating tube (14) is fixedly connected to one side of the surface of the mounting plate (13), an exhaust pipe (15) is fixedly connected to one side of the surface of the heating tube (14), and an electric valve (16) is rotatably connected to one side of the inner wall of the exhaust pipe (15).

8. The device for storing high-alkalinity residues for capturing carbon dioxide according to claim 6, characterized in that: A mounting platform (17) is fixedly connected to one side of the bottom of the mounting bracket (1), a mixing tank (18) is fixedly connected to one side of the top of the mounting platform (17), and one side of the top of the mixing tank (18) is fixedly connected to the bottom end of the exhaust pipe (15), a protection box (19) is fixedly connected to the middle of the top of the mixing tank (18), a second drive motor (20) is fixedly connected to one side of the inner wall of the protection box (19), a transmission rod (21) is installed at the output end of the second drive motor (20), a stirring rod (22) is fixedly connected to the bottom end of the transmission rod (21), and a plurality of stirring blades are fixedly connected to one side of the surface of the stirring rod (22). A scraper (24) is fixedly connected to one side of the surface of the stirring blade (23), and one side of the surface of the scraper (24) overlaps the inner wall of the mixing tank (18), a feeding pipe (25) is fixedly connected to one side of the top of the mixing tank (18), a discharge pipe (26) is fixedly connected to the middle of the bottom of the mixing tank (18), a servo motor (27) is fixedly connected to one side of the inner bottom wall of the mixing tank (18), a movable rod (28) is installed at the output end of the servo motor (27), a sealing plate (29) is fixedly connected to the top of the movable rod (28), and one side of the surface of the sealing plate (29) is plugged into the inner wall of the discharge pipe (26).

9. The device for storing high-alkalinity residue for capturing carbon dioxide according to claim 8, characterized in that: A controller (30) is fixedly connected to the other side of the top of the installation platform (17), and a control panel (31) is electrically connected to one side of the surface of the controller (30). Support frames (32) are fixedly connected to the four sides of the bottom of the installation platform (17), and a fixed base plate (33) is fixedly connected to the bottom end of the support frame (32).

10. The device for storing high-alkalinity residues for capturing carbon dioxide according to claim 9, characterized in that: Both sides of the inner wall of the fixed bottom plate (33) are provided with plugging holes (34), one side of the inner wall of the plugging hole (34) is plugged with a plugging rod (35), one end of the plugging rod (35) is fixedly connected to a mold box (36), and one side of the surface of the mold box (36) is plugged into the inner wall of the fixed bottom plate (33).

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