Fluidized bed device for directly trapping carbon dioxide from air and use method of fluidized bed device

Abstract

The invention belongs to the technical field of carbon dioxide trapping, and particularly relates to a fluidized bed device for direct air trapping of carbon dioxide and a using method thereof.The fluidized bed device comprises a flowing rail car, hollow supporting pipes are fixed to the four end corners of the top of the flowing rail car, and a shell is fixed to the tops of the multiple hollow supporting pipes; a discharging cavity and a material collecting cavity are formed in the shell, a plurality of trays are assembled at the upper end of the flowing rail car and are sequentially arranged in the direction of the positive vertical plane, adsorption media are placed in the trays, a plurality of supporting rods are fixed among the trays and are distributed in a linear shape, and the supporting rods are arranged in the shell. And a plurality of air holes are uniformly formed in the side wall of the tray. Unipolar charges are released to the dust collection coiled material through the discharging rod, so that the dust collection coiled material can adsorb dust close to the tray, and the situation that dust in air falls on the surface of an adsorption medium, and the carbon dioxide trapping efficiency of the adsorption medium is reduced is avoided.

Description

Technical Field

[0001] This invention belongs to the field of carbon dioxide capture technology, specifically relating to a fluidized bed device for direct air capture of carbon dioxide and its usage method. Background Technology

[0002] As global climate change intensifies, controlling atmospheric carbon dioxide concentration has become a core task in environmental governance for all countries. Direct air capture (DAC) technology, capable of actively separating carbon dioxide from the air, has become a key technological pathway to achieving carbon neutrality. Among these technologies, fluidized bed devices, with their continuously flowing adsorption medium, effectively enhance mass transfer efficiency between the gas and solid phases and reduce adsorption dead zones. They have demonstrated significant application potential in large-scale DAC systems and are gradually becoming one of the key device types under research in the industry.

[0003] However, fluidized bed devices face significant interference from airborne dust during actual operation. Air, as the capture material, inevitably contains suspended dust particles. These dust particles enter the fluidized bed with the airflow and gradually adhere to the surface of the adsorption medium. On one hand, dust clogs the pore structure of the adsorption medium, hindering the diffusion of carbon dioxide molecules to the active sites within the medium. On the other hand, dust particles cover the active adsorption sites on the medium surface, directly reducing the adsorption capacity of the medium per unit mass for carbon dioxide. This leads to a continuous decline in the overall capture efficiency of the device, increasing the frequency of adsorption medium replacement and significantly raising the system's operating costs.

[0004] In summary, existing direct air capture fluidized bed devices have not effectively addressed the negative impact of dust on the adsorption medium. The dust-induced decrease in adsorption efficiency has become a key bottleneck restricting the stable and efficient operation of such devices. Therefore, developing a fluidized bed device that can mitigate dust interference and ensure the continuous and efficient operation of the adsorption medium is of great significance for promoting the industrial application of direct air capture technology. Summary of the Invention

[0005] The purpose of this invention is to provide a fluidized bed device for direct air capture of carbon dioxide. By releasing a unipolar charge onto the dust collection roll with a discharge rod, the dust collection roll can adsorb dust near the tray, preventing dust in the air from falling onto the surface of the adsorption medium and reducing the efficiency of the adsorption medium in capturing carbon dioxide.

[0006] The specific technical solution adopted by this invention is as follows: A mobile bed device for direct air capture of carbon dioxide includes a mobile track vehicle. Hollow support tubes are fixed to the four corners of the top of the mobile track vehicle. A shell is fixed to the top of each hollow support tube. The shell contains a discharge chamber and a receiving chamber. Multiple trays are mounted on the upper end of the mobile track vehicle, arranged sequentially in a vertical direction. An adsorption medium is placed inside each tray. Multiple support rods are fixed between the trays, arranged in a straight line. Multiple air holes are evenly distributed on the sidewalls of each tray. The device also includes: A dust collection assembly is assembled between the mobile railcar and the housing. The dust collection assembly includes two dust collection rolls, which are assembled between the mobile railcar and the housing and located on both sides of the support rod. The dust collection rolls are compatible with the tray. An electrostatic generator assembly is assembled between the mobile track vehicle and the housing, and the electrostatic generator assembly is configured to release a unipolar charge to the dust collection roll material; In the process of carbon dioxide capture by the adsorption medium, the dust collection roll carrying a unipolar charge is able to separate dust from the air near the tray.

[0007] In a preferred embodiment, the dust collection assembly further includes a feeding roller, a drive motor, a receiving roller, and a first flange seat. The feeding roller is rotatably connected to the inside of the mobile track vehicle via ball bearings. The drive motor is fixed inside the receiving chamber. The receiving roller is fixed to the output end of the drive motor. The first flange seat is fixed inside the receiving chamber. The receiving roller and the first flange seat are rotatably connected via ball bearings. The two ends of the dust collection roll are respectively wound around the outside of the feeding roller and the receiving roller.

[0008] In a preferred embodiment, the dust collection roll is any one of the following materials: polypropylene nonwoven fabric, LDPE film, natural cellulose composite material, or other flexible material with electrostatic properties.

[0009] In a preferred embodiment, the particle diameter of the adsorption medium is denoted as D1, and the inner diameter of the pores is denoted as D2, where D1 > D2.

[0010] In a preferred embodiment, the electrostatic generating assembly includes an electrostatic generating unit and a plurality of discharge rods. The electrostatic generating unit is assembled inside the discharge chamber, and the plurality of discharge rods are uniformly fixed on one side of a plurality of hollow support tubes near the support rods. The discharge rods and the electrostatic generating unit are electrically connected by wires. In the working state, the dust collection roll is distributed in an S-shape on the outside of the plurality of discharge rods.

[0011] In a preferred embodiment, the dust collection roll located between two adjacent trays is U-shaped.

[0012] In a preferred embodiment, a plurality of protective plates are fixed on one side of the hollow support tube, and the interior of the protective plates is provided with U-shaped protective grooves, which are compatible with the discharge rod.

[0013] In a preferred embodiment, the protective plate is made of one of the following materials: PP, PE, PTFE, or other insulating materials that do not interfere with electrostatic discharge.

[0014] In a preferred embodiment, a second flange seat is fixed on both sides of the inside of the receiving cavity, and an electrostatic eliminator is fixed inside the two second flange seats. A grounding wire is fixed to one end of the electrostatic eliminator, and the electrostatic eliminator is in contact with the dust collection roll. The dust collection roll slides over the surface of the electrostatic eliminator and then is wound up to the outside of the receiving roller.

[0015] A method of using a fluidized bed device for direct air capture of carbon dioxide, applicable to any of the above-described fluidized bed devices for direct air capture of carbon dioxide, includes the following steps: St1: Start the mobile track vehicle, which moves the tray and adsorption medium synchronously, and captures carbon dioxide in the air through the adsorption medium. St2: Start the electrostatic generator unit, which releases unipolar charges onto the surface of the dust collection roll through the discharge rod, and the dust collection roll adsorbs the dust near the tray. St3: After the dust collection roll located between the mobile track car and the shell has worked for a preset time, the drive motor is started, and the dust collection roll with dust adsorbed by the take-up roller is wound up. At the same time, the dust collection roll wound on the outside of the unloading roller moves between the mobile track car and the shell.

[0016] The technical effects achieved by this invention are as follows: This invention uses a mobile track vehicle to move a tray containing an adsorption medium. At the same time, a discharge rod releases a unipolar charge onto the dust collection roll, enabling the dust collection roll to adsorb dust near the tray, thus preventing dust in the air from falling onto the surface of the adsorption medium and reducing the efficiency of the adsorption medium in capturing carbon dioxide. This invention uses a drive motor to rotate a take-up roller to roll up dust-collecting rolls that have absorbed dust. Simultaneously, the rolls are wound around the outside of the unloading roller and moved from inside the mobile track car to between the mobile track car and the dust-collecting rolls. This allows the device to easily replace the dust-collecting rolls and ensures the dust-collecting rolls' effective dust absorption. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a rear view of the overall structure of the present invention; Figure 3 This is a schematic diagram of the structure of the tray of the present invention; Figure 4 This is a schematic diagram of the internal structure of the housing of the present invention; Figure 5 This is a schematic diagram of the dust collection component of the present invention; Figure 6 This is an exploded view of the dust collection component of the present invention; Figure 7 This is a schematic diagram of the structure of the protective plate of the present invention; Figure 8 This is a left view of the structure of the dust collection roll and tray of the present invention; Figure 9 This is a schematic diagram of the structure of the analytical chamber unit and the annular track unit of the present invention.

[0018] The attached diagram lists the components represented by each number as follows: 10. Mobile track vehicle; 11. Hollow support tube; 12. Shell; 13. Discharge chamber; 14. Receiving chamber; 15. Pallet; 16. Support rod; 17. Air hole; 20. Dust collection components; 21. Dust-collecting roll material; 22. Feeding roller; 23. Drive motor; 24. Taking roller; 25. First flange seat; 30. Static electricity generating component; 31. Static electricity generation unit; 32. Discharge rod; 33. Protective plate; 34. U-shaped protective groove; 35. Second flange seat; 36. Static electricity eliminator rod. Detailed Implementation

[0019] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0020] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0021] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in a preferred embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0022] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth. Example

[0023] Please see the appendix Figures 1 to 6 As shown, this is the first embodiment of the present invention. This embodiment provides a moving bed device for direct air capture of carbon dioxide, including a moving track 10. Hollow support tubes 11 are fixed to the four corners of the top of the moving track 10. A housing 12 is fixed to the top of the multiple hollow support tubes 11. A discharge chamber 13 and a receiving chamber 14 are opened inside the housing 12. Multiple trays 15 are mounted on the upper end of the moving track 10, and the multiple trays 15 are arranged sequentially in the vertical direction. An adsorption medium is placed inside the trays 15. Multiple support rods 16 are fixed between the multiple trays 15, and the multiple support rods 16 are distributed in a straight line. Adjacent trays 15 are fixedly connected by support rods 16. Multiple air holes 17 are evenly opened on the sidewalls of the trays 15. The device also includes: Dust collection assembly 20 is assembled between the mobile railcar 10 and the housing 12. The dust collection assembly 20 includes two dust collection rolls 21, which are assembled between the mobile railcar 10 and the housing 12 and located on both sides of the support rod 16. The dust collection rolls 21 are adapted to the tray 15. An electrostatic generator 30 is assembled between the mobile railcar 10 and the housing 12. The electrostatic generator 30 is configured to release a unipolar charge to the dust collection roll 21. In operation, the dust collection roll 21 moves intermittently across multiple trays 15. During the process of carbon dioxide capture by the adsorption medium, the dust collection roll 21, which carries a unipolar charge, can separate and adsorb dust in the air near the trays 15.

[0024] It should be noted that you should refer to [link / reference]. Figure 9As shown, a fluidized bed analytical module is also used in conjunction with this device. The fluidized bed analytical module includes at least a ring track unit, an analytical chamber unit, a robotic arm unit, a steam generation unit, a vacuum pump unit, a condensation unit, a compression and storage unit, and a control module. The ring track unit integrates a power supply module, which guides the movement path of the fluidized bed 10 and supplies power to the electrical components inside and above the fluidized bed 10. The robotic arm unit can move multiple trays 15 located within its working range and on the same fluidized bed 10 to the analytical chamber unit or move multiple trays 15 from the analytical chamber unit to the top of an empty fluidized bed 10. The steam generation unit can input high-temperature steam into the analytical chamber unit. The vacuum pump unit can pump... Gas is drawn from the desorption chamber to create a vacuum chamber inside the desorption chamber unit. After creating a vacuum environment and introducing high-temperature steam, the saturated adsorption medium inside the desorption chamber unit releases the carbon dioxide it has absorbed, thus regenerating the adsorption medium. The desorption chamber unit is equipped with a loading and unloading hatch. When both hatches are sealed, the interior of the desorption chamber unit is a sealed chamber. The condensation unit extracts the carbon dioxide released from the desorption chamber unit and cools and separates the water vapor in the carbon dioxide. The compression and storage unit compresses and stores the carbon dioxide output from the condensation unit. The control module controls the operation of all the above units and the mobile railcar 10 via wireless and / or wired connections.

[0025] Furthermore, the mobile railcar 10 is equipped with at least a drive unit inside, which enables the mobile railcar 10 to move along the circular track unit. Its specific structure can refer to the prior art and is not further limited here. In the process of the mobile railcar 10 carrying the adsorption medium, the adsorption medium can directly capture carbon dioxide in the air.

[0026] In this embodiment, the driving unit moves the mobile track vehicle 10 along the circular track unit. Carbon dioxide in the air is directly captured by the adsorption medium at the upper end of the mobile track vehicle 10. During the capture process, since the adsorption medium is directly exposed to the air, dust in the air will fall onto the surface of the adsorption medium. If the dust is not treated in time, the efficiency of the adsorption medium in capturing carbon dioxide will be reduced. Simultaneously, when the desorption chamber unit, which is in a high-temperature vacuum state, regenerates the adsorption medium, dust will follow the adsorption medium into the desorption chamber unit, vacuum pump unit, and condenser unit. During the capture process, the electrostatic generator is activated. The component 30 releases a unipolar charge onto the surface of the dust collection roll 21 through the electrostatic generator 30. The dust collection roll 21 carrying the unipolar charge adsorbs the dust near the tray 15, preventing the dust from falling onto the surface of the adsorption medium and thus preventing the dust from reducing the collection efficiency of the adsorption medium. When loading and unloading the tray 15 on the upper end of the mobile railcar 10, the robotic arm unit clamps the tray 15 and moves it along the gap between the two dust collection rolls 21, ensuring that the tray 15 can move smoothly out of the dust collection roll 21 and that the tray 15 will not collide with the dust collection roll 21 during the loading and unloading process.

[0027] Secondly, please refer to it again. Figures 5 to 6 The dust collection assembly 20 also includes a feeding roller 22, a drive motor 23, a receiving roller 24, and a first flange seat 25. The feeding roller 22 is rotatably connected to the inside of the mobile track vehicle 10 via ball bearings. The drive motor 23 is fixed inside the receiving chamber 14. The receiving roller 24 is fixed to the output end of the drive motor 23. The first flange seat 25 is fixed inside the receiving chamber 14, and the receiving roller 24 and the first flange seat 25 are rotatably connected via ball bearings. The two ends of the dust collection roll 21 are respectively wound around the outside of the feeding roller 22 and the receiving roller 24.

[0028] Here, the inside of the mobile track car 10 is provided with a discharge chamber. The discharge roller 22 is rotatably connected to the inside of the discharge chamber through ball bearings. The upper end of the discharge chamber is provided with a discharge port, and the lower end of the receiving chamber 14 is provided with a feed port. The discharge port and the dust collection roll 21 and the feed port dust collection roll 21 are all compatible with each other. The discharge chamber and the discharge chamber 13 are both provided with a material replacement door (not shown in the figure) on one side. The material replacement door facilitates the overall replacement of the dust collection roll 21.

[0029] Furthermore, the length of the dust collection roll 21 located between the mobile track vehicle 10 and the housing 12 is denoted as L1, and the distance that the dust collection roll 21 moves after each operation of the drive motor 23 is denoted as L2, where L1 equals L2.

[0030] In this embodiment, after the dust collection roll 21 located between the mobile track vehicle 10 and the housing 12 has been exposed to the air for a preset period of time, the drive motor 23 is started. Through the fixed connection between the drive motor 23 and the take-up roller 24, the drive motor 23 drives the take-up roller 24 to rotate. The take-up roller 24 winds up the dust collection roll 21, causing the dust collection roll 21 located between the mobile track vehicle 10 and the housing 12 and adsorbed with dust to move into the take-up chamber 14 and be wound around the outside of the take-up roller 24. At the same time, the dust collection roll 21 wound around the outside of the unloading roller 22 moves between the mobile track vehicle 10 and the housing 12. During the process of the dust collection roll 21 wound around the outside of the unloading roller 22 moving between the mobile track vehicle 10 and the housing 12, a unipolar charge is released to its surface through the electrostatic generator 30.

[0031] It should be noted that the preset duration refers to the interval between two consecutive starts of the drive motor 23. By setting the preset duration, the dust collection roll 21 carrying a unipolar charge can stay between the mobile track vehicle 10 and the housing 12 for a sufficient period of time to adsorb dust, thereby reducing the usage cost of the dust collection roll 21. Due to differences in usage environment and weather, the preset duration can be adjusted according to the specific usage environment. Here, no specific limitation is made. For example, in areas and / or seasons with better air quality, a longer preset duration will result in a corresponding decrease in the movement frequency of the dust collection roll 21; in areas and / or seasons with poor air quality, a shorter preset duration will result in a corresponding increase in the movement frequency of the dust collection roll 21.

[0032] In a preferred embodiment, the dust collection roll 21 is any one of the following materials: polypropylene nonwoven fabric, LDPE low-density polyethylene film, natural cellulose composite material or other flexible materials with electrostatic properties. In this embodiment, the material of the dust collection roll 21 is preferably polypropylene nonwoven fabric.

[0033] In a preferred embodiment, the particle diameter of the adsorption medium is denoted as D1, and the inner diameter of the pore 17 is denoted as D2, where D1 > D2.

[0034] In this embodiment, the arrangement of the pores 17 can increase the contact area between the adsorption medium and the air, thereby improving the adsorption medium's capture effect on carbon dioxide. At the same time, the above-mentioned arrangement can prevent the adsorption medium from falling out of the pores 17.

[0035] Please refer to it again. Figure 4 and Figure 8The electrostatic generator assembly 30 includes an electrostatic generator unit 31 and multiple discharge rods 32. The electrostatic generator unit 31 is assembled inside the discharge chamber 13. The multiple discharge rods 32 are uniformly fixed on the side of multiple hollow support tubes 11 near the support rod 16. The discharge rods 32 and the electrostatic generator unit 31 are electrically connected by wires. In the working state, the dust collection roll 21 is distributed in an S-shape on the outside of the multiple discharge rods 32.

[0036] It should be noted that during the collection process, the electrostatic generator 31 can operate continuously or intermittently, as long as the surface of the dust collection roll 21 is continuously charged. Since the duration of charge on the surface of the dust collection roll 21 is affected by environmental factors, the frequency and duration of the intermittent operation of the electrostatic generator 31 can be adjusted according to the actual use environment. No further limitations are made here.

[0037] Furthermore, the electrostatic generating unit 31 is a mature existing application, and its internal structure can be referred to existing technologies. Here, it will not be described in detail.

[0038] Specifically, in order to ensure the dust collection roll 21 has a good dust adsorption effect, the distance between the dust collection roll 21 and each tray 15 is 1mm to 10mm. In this embodiment, the distance between the dust collection roll 21 and each tray 15 is preferably 5mm.

[0039] In this embodiment, when the drive motor 23 is started, the take-up roller 24 is rotated by the drive motor 23 to take up the dust collection roll 21. During this process, the dust collection roll 21, which is wound around the outside of the unloading roller 22, moves from inside the mobile track car 10 to between the mobile track car 10 and the dust collection roll 21. When the dust collection roll 21 comes into contact with the discharge rod 32, the discharge rod 32 releases a unipolar charge on the surface of the dust collection roll 21. Since the material of the dust collection roll 21 is a flexible material with electrostatic properties, the dust collection roll 21 can carry a unipolar charge and move synchronously. When dust in the air approaches the air hole 17, the dust is adsorbed by the unipolar charge carried on the surface of the dust collection roll 21, so that the dust near the air hole 17 is collected on the surface of the dust collection roll 21, thereby preventing the dust from falling onto the surface of the adsorption medium through the air hole 17 and reducing the adsorption medium's capture efficiency of carbon dioxide.

[0040] Please refer to it again. Figure 8 The dust collection roll 21 located between two adjacent trays 15 is U-shaped.

[0041] It should be noted that, Figure 8 The direction indicated by the middle arrow is the direction of movement of pallet 15 when unloading from pallet 15 by the robotic arm unit.

[0042] In this embodiment, the above-mentioned scheme ensures that the pallet 15 and the dust collection roll 21 will not collide when the robotic arm unit loads and unloads the pallet 15.

[0043] Please refer to it again. Figure 7 A number of protective plates 33 are fixed on the side of the hollow support tube 11 near the support rod 16. The protective plates 33 have U-shaped protective grooves 34 inside, and the U-shaped protective grooves 34 are compatible with the discharge rod 32.

[0044] Here, the material of the protective plate 33 is one of the following: PP, PE, PTFE or other insulating materials that do not interfere with electrostatic discharge. In this embodiment, the material of the protective plate 33 is preferably PTFE.

[0045] In this embodiment, the U-shaped protective groove 34 can shield the discharge rod 32, preventing workers from accidentally touching the discharge rod 32 and causing a safety accident, thus improving the safety performance of the device.

[0046] Please refer to it again. Figure 4 and Figure 8 The inside of the receiving chamber 14 is fixed with two second flange seats 35 on both sides. The inside of the two second flange seats 35 is fixed with static elimination rods 36. One end of the static elimination rods 36 is fixed with a grounding wire, and the static elimination rods 36 and the dust collection roll 21 are in contact. The dust collection roll 21 slides over the surface of the static elimination rods 36 and then rolls up to the outside of the receiving roller 24.

[0047] It should be noted that the ground wire is connected to the power supply module inside the ring track unit.

[0048] In this embodiment, when the drive motor 23 is started to wind up the dust collection roll 21 located between the mobile track car 10 and the housing 12, the dust collection roll 21 slides over the surface of the static elimination rod 36 and then winds around the outside of the take-up roller 24. When the dust collection roll 21 carrying unipolar charge comes into contact with the static elimination rod 36, the unipolar charge on the surface of the dust collection roll 21 can be eliminated through the cooperation of the static elimination rod 36 and the grounding wire. Example

[0049] This embodiment provides a method for using a fluidized bed device for direct air capture of carbon dioxide, applicable to any of the fluidized bed devices for direct air capture of carbon dioxide in Embodiment 1, including the following steps: St1: Start the mobile track vehicle 10, so that the mobile track vehicle 10 drives the tray 15 and the adsorption medium to move synchronously along the circular track unit, and capture carbon dioxide in the air through the adsorption medium. St2: Start the electrostatic generator 31 and release unipolar charges to the surface of the dust collection roll 21 through the discharge rod 32. The dust near the tray 15 is adsorbed by the unipolar charges carried on the surface of the dust collection roll 21. St3: After the working time of the dust collection roll 21 located between the mobile track car 10 and the housing 12 reaches the preset time, the drive motor 23 is started. The drive motor 23 drives the take-up roller 24 to wind the dust collection roll 21 located between the mobile track car 10 and the housing 12 and which has adsorbed dust. At the same time, the dust collection roll 21 wound on the outside of the unloading roller 22 moves to the space between the mobile track car 10 and the housing 12 to replace the dust collection roll 21 located between the mobile track car 10 and the housing 12. During the above movement, the discharge rod 32 releases a unipolar charge on the surface of the replaced dust collection roll 21. St4: When the time for the dust collection roll 21 to capture carbon dioxide reaches the preset time, the mobile railcar 10 is started to move along the circular track unit towards the direction of the desorption chamber unit, and the adsorption medium containing carbon dioxide and the tray 15 are transported to the interior of the desorption chamber unit through the robotic arm unit. St5: Start the vacuum pump unit to extract the air inside the desorption chamber unit, so that a vacuum environment is created inside the desorption chamber unit; St6: Start the steam generation unit and input high-temperature steam into the desorption chamber unit to create a high-temperature vacuum environment inside the desorption chamber unit, so that the adsorption medium releases carbon dioxide and achieves regeneration. St7: Start the condenser unit to extract carbon dioxide from the desorption chamber unit, separate the moisture in the carbon dioxide and cool it down; St8: Activate the compression and storage unit to compress and store the carbon dioxide output from the condenser unit.

[0050] The working principle of this invention is as follows: The mobile track 10 moves along the circular track unit via a drive unit. Carbon dioxide in the air is directly captured by the adsorption medium at the top of the mobile track 10. A discharge rod 32 releases a unipolar charge onto the dust collection roll 21, which then adsorbs dust near the tray 15. When the dust collection roll 21, located between the mobile track 10 and the housing 12, is exposed to air for a preset time, the drive motor 23 is activated. The fixed connection between the drive motor 23 and the take-up roller 24 enables the drive motor to... 23 drives the take-up roller 24 to rotate, and the take-up roller 24 winds up the dust collection roll 21, so that the dust collection roll 21 located between the mobile track car 10 and the housing 12 and adsorbed with dust moves into the take-up cavity 14 and is wound around the outside of the take-up roller 24. At the same time, the dust collection roll 21 wound around the outside of the unloading roller 22 moves between the mobile track car 10 and the housing 12. During the process of the dust collection roll 21 wound around the outside of the unloading roller 22 moving between the mobile track car 10 and the housing 12, a unipolar charge is released to its surface through the electrostatic generator 30.

[0051] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention are implemented according to conventional methods in the art unless otherwise specified or limited.

Claims

1. A fluidized bed device for direct air capture of carbon dioxide, characterized in that: The system includes a mobile track vehicle (10), with hollow support tubes (11) fixed at each of the four corners of the top of the mobile track vehicle (10). A housing (12) is fixed to the top of each of the hollow support tubes (11). The housing (12) contains a discharge chamber (13) and a receiving chamber (14). The upper end of the mobile track vehicle (10) is equipped with multiple trays (15), which are arranged sequentially in the vertical direction. An adsorption medium is placed inside each tray (15). Multiple support rods (16) are fixed between the multiple trays (15) and are arranged in a straight line. Multiple air holes (17) are evenly distributed on the sidewalls of each tray (15). The system also includes: A dust collection assembly (20) is assembled between a mobile railcar (10) and a housing (12). The dust collection assembly (20) includes two dust collection rolls (21), which are assembled between the mobile railcar (10) and the housing (12) and located on both sides of a support rod (16). The dust collection rolls (21) are adapted to a tray (15). An electrostatic generator assembly (30) is mounted between the mobile railcar (10) and the housing (12), and the electrostatic generator assembly (30) is configured to release a unipolar charge to the dust collection roll (21); During the process of carbon dioxide capture by the adsorption medium, the dust collection roll (21) carrying a unipolar charge is able to separate dust in the air near the tray (15).

2. The fluidized bed device for direct air capture of carbon dioxide according to claim 1, characterized in that: The dust collection assembly (20) also includes a feeding roller (22), a drive motor (23), a receiving roller (24), and a first flange seat (25). The feeding roller (22) is rotatably connected to the inside of the mobile track vehicle (10) via ball bearings. The drive motor (23) is fixed inside the receiving chamber (14). The receiving roller (24) is fixed to the output end of the drive motor (23). The first flange seat (25) is fixed inside the receiving chamber (14). The receiving roller (24) and the first flange seat (25) are rotatably connected via ball bearings. The two ends of the dust collection roll (21) are respectively wound around the outside of the feeding roller (22) and the receiving roller (24).

3. The fluidized bed device for direct air capture of carbon dioxide according to claim 1, characterized in that: The dust collection roll (21) is any one of the following materials: polypropylene nonwoven fabric, LDPE film, or natural cellulose composite material.

4. The fluidized bed device for direct air capture of carbon dioxide according to claim 1, characterized in that: The particle diameter of the adsorption medium is denoted as D1, and the inner diameter of the pore (17) is denoted as D2, where D1 > D2.

5. A fluidized bed device for direct air capture of carbon dioxide according to claim 1, characterized in that: The electrostatic generating assembly (30) includes an electrostatic generating unit (31) and multiple discharge rods (32). The electrostatic generating unit (31) is assembled inside the discharge chamber (13). The multiple discharge rods (32) are uniformly fixed on one side of multiple hollow support tubes (11) near the support rod (16). The discharge rods (32) and the electrostatic generating unit (31) are electrically connected. In the working state, the dust collection roll (21) is distributed in an S-shape on the outside of the multiple discharge rods (32).

6. The fluidized bed device for direct air capture of carbon dioxide according to claim 1, characterized in that: The dust collection roll (21) located between two adjacent trays (15) is U-shaped.

7. A fluidized bed device for direct air capture of carbon dioxide according to claim 5, characterized in that: Multiple protective plates (33) are fixed on one side of the hollow support tube (11). The protective plates (33) have U-shaped protective grooves (34) inside, and the U-shaped protective grooves (34) are compatible with the discharge rod (32).

8. A fluidized bed apparatus for direct air capture of carbon dioxide according to claim 7, characterized in that: The protective plate (33) is made of one of the following materials: PP, PE, PTFE or other insulating materials that do not interfere with electrostatic discharge.

9. A fluidized bed device for direct air capture of carbon dioxide according to claim 5, characterized in that: The receiving chamber (14) has two sides of a second flange seat (35) fixed inside. The two second flange seats (35) have an electrostatic eliminator (36) fixed inside. One end of the electrostatic eliminator (36) is fixed with a grounding wire, and the electrostatic eliminator (36) is attached to the dust collection roll (21).

10. A method of using a fluidized bed apparatus for direct air capture of carbon dioxide, applicable to any one of claims 1 to 9, characterized in that: Includes the following steps: St1: Start the mobile railcar (10) so that the mobile railcar (10) moves the tray (15) and the adsorption medium synchronously, and captures carbon dioxide in the air through the adsorption medium; St2: Start the electrostatic generator (31) and release unipolar charges onto the surface of the dust collection roll (21) through the discharge rod (32) to adsorb the dust near the tray (15) through the dust collection roll (21); St3: After the working time of the dust collection roll (21) located between the mobile track car (10) and the shell (12) reaches the preset time, the drive motor (23) is started, and the dust collection roll (21) with dust is adsorbed by the take-up roller (24) and wound. At the same time, the dust collection roll (21) wound on the outside of the unloading roller (22) moves to the space between the mobile track car (10) and the shell (12).

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