Air trapping device

Abstract

The invention relates to an air trapping device. The air trapping device comprises a shell and a bearing mechanism. The shell is provided with a containing cavity, a gas inlet and a gas outlet, the bearing mechanism is arranged in the containing cavity, the bearing mechanism is provided with a plurality of sub-cavities, the sub-cavities communicate with the gas inlet and the gas outlet correspondingly, and the sub-cavities are used for bearing adsorbents. Through the technical scheme provided by the invention, the plurality of sub-chambers can simultaneously adsorb or desorb carbon dioxide, and the thickness of the adsorbent in each sub-chamber is greatly reduced, so that heat does not need to penetrate through the relatively thick overall bearing mechanism and only needs to be transferred in a single sub-chamber, a heat transfer path is remarkably shortened, the temperature gradient in the bearing mechanism is effectively reduced, and the heat transfer efficiency is improved. The bearing mechanism can quickly achieve temperature balance, so that the heating and cooling rates of the adsorbent can be accelerated, the carbon dioxide adsorption and desorption cycle period is remarkably shortened, and the carbon dioxide capture capacity of the air capture device is improved.

Description

Technical Field

[0001] This application relates to the field of gas adsorption and separation technology, and in particular to air capture devices. Background Technology

[0002] Direct air capture technology is a negative emission technology that extracts carbon dioxide directly from the atmosphere through chemical or physical processes. It mainly utilizes adsorbents to selectively capture carbon dioxide and regenerate and recycle it, ultimately achieving permanent storage or resource utilization of carbon dioxide.

[0003] In related technologies, air capture devices typically employ granular packed fixed-bed reactors. Granular solid adsorbent is packed into a fixed bed, and air passes through the bed under the action of an induced draft fan, completing the adsorption of carbon dioxide. Regeneration is primarily achieved by introducing a regeneration medium to desorb carbon dioxide; this medium is typically hot steam or a thermal inert gas. The adsorption of carbon dioxide is an exothermic reaction, while its desorption is an endothermic reaction.

[0004] However, the poor heat transfer performance of the bed in the relevant technology leads to an increase in the internal temperature gradient of the bed, which slows down the heating and cooling rate of the adsorbent, thereby prolonging the adsorption and desorption cycle of carbon dioxide and restricting carbon dioxide production capacity. Summary of the Invention

[0005] Therefore, it is necessary to provide an air capture device to address the problem of large temperature gradients inside the bed.

[0006] An air capture device, the air capture device comprising:

[0007] The shell is provided with a receiving cavity and a gas inlet and a gas outlet communicating with the receiving cavity;

[0008] The carrier mechanism is located inside the receiving cavity. The carrier mechanism has multiple sub-chambers, each of which is connected to a gas inlet and a gas outlet. The sub-chambers are used to carry the adsorbent.

[0009] In one embodiment, a gas passage is provided between two adjacent sub-chambers, the gas passage is connected to the corresponding two sub-chambers, and the gas passage is connected to a gas inlet.

[0010] In one embodiment, the sub-chambers and gas channels are arranged alternately along a first direction, and a vent is provided on the side of the sub-chamber near the gas channel to connect the sub-chamber and the gas channel. The first direction is perpendicular to the gas inlet direction.

[0011] In one embodiment, the sidewall of the sub-chamber extending along the gas inlet direction is configured as a porous structure; and / or,

[0012] The sidewalls of the sub-chamber extending along the first direction are configured as porous structures;

[0013] The porous structure has multiple air vents.

[0014] In one embodiment, the gas outlet and the vent are misaligned.

[0015] In one embodiment, the gas inlet and the gas outlet are located at opposite ends of the bearing mechanism along the gas inlet direction.

[0016] In one embodiment, the air trapping device further includes:

[0017] The electrode interface, located on the carrier mechanism, is used for electrical connection with the power supply and adsorbent.

[0018] In one embodiment, multiple sub-chambers are connected in sequence, and the electrode interface is located in the outer sub-chamber.

[0019] In one embodiment, a regeneration medium inlet is provided on the housing, which is connected to the receiving cavity, and the regeneration medium inlet and the gas inlet are located on the same side of the housing.

[0020] In one embodiment, the air trapping device further includes:

[0021] An induced draft fan, located on the outside of the casing, is used to blow air into the gas inlet;

[0022] A sealing door, installed in the housing, can either block or open the gas inlet;

[0023] A vacuum component, connected to the gas outlet, is used to evacuate the containment cavity.

[0024] The aforementioned air capture device has a supporting mechanism housed within a receiving cavity. This supporting mechanism comprises multiple sub-chambers, each containing an adsorbent. Each sub-chamber is connected to both a gas inlet and a gas outlet. During carbon dioxide adsorption, air enters each sub-chamber through the gas inlet, the adsorbent adsorbs carbon dioxide, and other gases exit through the sub-chambers and are then discharged to the outside through the gas outlet. During carbon dioxide desorption, the gas inlet is closed, carbon dioxide desorbs from the adsorbent, and high-concentration carbon dioxide exits through the sub-chambers and is then recovered and stored through the gas outlet. This structure, by using multiple sub-chambers, increases the contact area between the adsorbent and the gas, ensuring sufficient contact between the gas and the adsorbent in each sub-chamber and improving the adsorption efficiency. Furthermore, multiple sub-chambers can simultaneously adsorb or desorb carbon dioxide, and the thickness of the adsorbent in each sub-chamber is significantly reduced. Heat does not need to penetrate the thicker overall support structure; it only needs to be transferred within a single sub-chamber, significantly shortening the heat transfer path and thus reducing thermal conductivity resistance. This effectively reduces the internal temperature gradient of the support structure, allowing it to quickly reach temperature equilibrium. Consequently, it accelerates the heating and cooling rates of the adsorbent, significantly shortening the carbon dioxide adsorption and desorption cycle and increasing the carbon dioxide capture capacity of the air capture device. Attached Figure Description

[0025] Figure 1 A front view of an air collection device provided in an embodiment of this application;

[0026] Figure 2 for Figure 1 A top view of the air capture device of the apparatus shown;

[0027] Figure 3 A schematic diagram of a structure in which multiple sub-chambers are connected on the side away from the gas inlet, according to another embodiment of this application;

[0028] Figure 4 This is a schematic diagram of a structure in which multiple sub-chambers are interconnected at their midpoints, according to another embodiment of this application.

[0029] Figure 5 A schematic diagram of a structure in which multiple sub-chambers are individually arranged, provided in another embodiment of this application;

[0030] Figure 6 for Figure 1 A cross-sectional view of the device shown;

[0031] Figure 7 for Figure 1 Right view of the device shown.

[0032] Explanation of reference numerals in the attached figures:

[0033] 10. Shell; 11. Receiving cavity; 12. Gas inlet; 13. Regeneration medium inlet; 14. Gas outlet;

[0034] 20. Bearing mechanism; 21. Sub-chamber; 22. Gas passage; 23. Porous structure; 24. Sealing element; 25. Connecting cavity;

[0035] 30. Electrode interface;

[0036] 40. Exhaust fan. Detailed Implementation

[0037] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0038] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0039] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0040] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0041] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0042] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0043] See Figure 1 , Figure 2 and Figure 6 One embodiment of this application provides an air collection device, which includes a housing 10 and a supporting mechanism 20. The housing 10 has a receiving cavity 11 and a gas inlet 12 and a gas outlet 14 communicating with the receiving cavity 11. The supporting mechanism 20 is disposed within the receiving cavity 11 and has multiple sub-chambers 21, each of which is connected to the gas inlet 12 and the gas outlet 14. The sub-chambers 21 are used to hold an adsorbent. (See also...) Figure 1 The X direction is the first direction, and the Z direction is the second direction. In some embodiments, the Z direction is the vertical direction. See also... Figure 2 The Y direction is the intake direction of gas inlet 12. The first direction, the second direction, and the intake direction of gas inlet 12 are all perpendicular to each other.

[0044] Using the technical solution of this application, the carrier mechanism 20 is disposed within the receiving cavity 11, and the carrier mechanism 20 includes multiple sub-chambers 21. The adsorbent is filled in different sub-chambers 21, and each sub-chamber 21 is connected to a gas inlet 12 and a gas outlet 14. During carbon dioxide adsorption, air enters different sub-chambers 21 through the gas inlet 12, the adsorbent adsorbs carbon dioxide, and other gases are discharged from the sub-chambers 21 and then discharged to the outside through the gas outlet 14. During carbon dioxide desorption, the gas inlet 12 is closed, carbon dioxide desorbs from the adsorbent, and high-concentration carbon dioxide is discharged from the sub-chambers 21 and then recovered and stored through the gas outlet 14. By adopting the above structure and setting multiple sub-chambers 21, the contact area between the adsorbent and the gas is increased, thereby ensuring sufficient contact between the gas and the adsorbent in each sub-chamber 21 and improving the adsorption effect of the adsorbent. Furthermore, multiple sub-chambers 21 can simultaneously adsorb or desorb carbon dioxide, and the thickness of the adsorbent in each sub-chamber 21 is significantly reduced. Heat does not need to penetrate the thicker overall support structure 20, but only needs to be transferred within a single sub-chamber 21, significantly shortening the heat transfer path, thereby reducing the heat conduction resistance and effectively reducing the internal temperature gradient of the support structure 20. The support structure 20 can quickly reach temperature equilibrium, which in turn can accelerate the heating and cooling rate of the adsorbent, significantly shorten the carbon dioxide adsorption and desorption cycle, and improve the carbon dioxide capture capacity of the air capture device.

[0045] In related technologies, fixed beds typically require a long bed length and high packing density to ensure sufficient contact between the gas and solid phases. However, in this application, it is not necessary to extend the length of the sub-chamber 21 or increase its packing density. By setting multiple sub-chambers 21, the specific surface area of ​​the adsorbent can be increased. Specific surface area refers to the total surface area per unit mass of solid material. When the specific surface area of ​​the adsorbent increases, the adsorbent can capture more carbon dioxide, thereby improving the gas-solid contact efficiency. Furthermore, a larger gas-solid contact area allows the heat generated by adsorption or desorption to be rapidly dispersed throughout the support structure 20, preventing localized heat accumulation and reducing the temperature gradient within the bed.

[0046] Furthermore, the above-mentioned structure in this application can enhance mass transfer efficiency, improve adsorbent utilization, and at the same time help reduce the thickness of the mass transfer band.

[0047] Mass transfer refers to the process by which a substance moves from one phase to another or to different regions within the same phase under the influence of driving forces such as concentration difference, pressure difference, and temperature difference. In air capture devices, the core objective of mass transfer is to rapidly transfer carbon dioxide from the air to the adsorbent.

[0048] The thickness of the mass transfer zone is a key parameter representing the thickness of the region within the carrier mechanism 20 where the carbon dioxide adsorption reaction is occurring. Air first contacts the adsorbent at the inlet side of the carrier mechanism 20, where it preferentially captures carbon dioxide and quickly reaches saturation. As the airflow advances, the saturated region gradually moves towards the outlet side of the carrier mechanism 20. Between the saturated and unadsorbed regions, a transition region where the adsorption reaction is taking place is formed; this transition region is the mass transfer zone. A thinner mass transfer zone indicates a more concentrated carbon dioxide adsorption reaction, allowing the adsorbent within the carrier mechanism 20 to participate in the reaction more rapidly and synchronously. A thicker mass transfer zone indicates that only a small portion of the carrier mechanism 20 is effectively adsorbing carbon dioxide, with most of the adsorbent in a state of unadsorbed or saturated conditions, resulting in low adsorbent utilization. Therefore, in this application, the sub-chamber 21 has a smaller volume, which improves the effective utilization rate of the adsorbent.

[0049] In some embodiments, the housing 10 has a box structure.

[0050] See Figure 2 A gas channel 22 connects two adjacent sub-chambers 21, and the gas channel 22 is also connected to the gas inlet 12. This configuration allows air to enter the gas channel 22 through the gas inlet 12, and then enter the sub-chambers 21 on both sides. This improves airflow and allows air to evenly penetrate the adsorbent within the sub-chambers 21 from the sides, increasing the contact efficiency between the adsorbent and air and further enhancing carbon dioxide capture efficiency.

[0051] See Figure 2 The sub-chambers 21 and gas channels 22 are arranged alternately along a first direction. A vent is provided on the side of the sub-chamber 21 closest to the gas channel 22 to connect the sub-chamber 21 and the gas channel 22. Using this mechanism, multiple sub-chambers 21 are spaced apart along the first direction, and multiple gas channels 22 are also spaced apart along the first direction. With this arrangement, air enters through the gas inlet 12 and can flow directly into the multiple gas channels 22. This alternating arrangement allows air to flow directly laterally from the gas channels 22 into the sub-chambers 21, shortening the airflow path and facilitating rapid contact between the air and the adsorbent.

[0052] See Figure 2The sidewall of the sub-chamber 21, extending along the air intake direction of the gas inlet 12, is configured with a porous structure 23. This porous structure 23 has multiple vents. This configuration increases the inlet area for air entering the sub-chamber 21 from the gas channel 22, reduces resistance to airflow into the sub-chamber 21, and improves airflow smoothness. Furthermore, the porous structure 23 includes multiple tiny, dispersed vents, allowing air to enter the sub-chamber 21 uniformly, thus ensuring that the adsorbent throughout the sub-chamber 21 can capture carbon dioxide, improving the uniformity of adsorption within the sub-chamber 21. Moreover, the sidewall of the support mechanism 20 is directly made using the porous structure 23, reducing the manufacturing difficulty of the support mechanism 20.

[0053] See Figure 2 In some embodiments, multiple sub-chambers 21 are connected end to end in sequence.

[0054] In some embodiments, a connecting cavity 25 is provided between two adjacent sub-chambers 21. The sidewalls of both the sub-chambers 21 and the connecting cavity 25 along the first direction are made of sealing elements 24. The dimension of the connecting cavity 25 along the gas inlet 12 is much smaller than the dimension of the sub-chambers 21 along the gas inlet 12. When the sidewalls of the sub-chambers 21 and the connecting cavity 25 along the first direction are made of sealing elements 24, air can be prevented from flowing directly through the connecting cavity 25 to the gas outlet 14, thereby driving air to flow into the sub-chambers 21 and ensuring the adsorption effect of the adsorbent.

[0055] In some embodiments, the sidewall of the bearing mechanism 20 corresponding to the gas passage 22 along the gas inlet 12 is made of a sealing element 24.

[0056] In some embodiments, the adsorbent is in particulate form, such as a particulate amine-modified porous material, and the size of the vent of the porous structure 23 can be set as needed.

[0057] In some embodiments, the porous structure 23 may be a mesh structure.

[0058] See Figure 3 The sidewalls of the sub-chamber 21 extending along the gas inlet 12 are configured with a porous structure 23, and the sidewalls of the sub-chamber 21 extending along the first direction are also configured with a porous structure 23. This configuration increases the inlet area for air to enter the sub-chamber 21 from the gas channel 22, reduces the resistance to air entering the sub-chamber 21, and improves the smoothness of airflow. Furthermore, the porous structure 23 includes multiple tiny, dispersed vents, allowing air to enter the sub-chamber 21 uniformly, thereby enabling the adsorbent throughout the sub-chamber 21 to capture carbon dioxide, improving the uniformity of adsorption within the sub-chamber 21.

[0059] In some embodiments, two adjacent sub-chambers 21 are interconnected by a connecting cavity 25, which is located on the side of the sub-chamber 21 away from the gas inlet 12. The sidewall of the connecting cavity 25 near the gas inlet 12 is made of a sealing element 24, and the sidewall of the connecting cavity 25 away from the gas inlet 12 is configured with a porous structure 23. The dimension of the connecting cavity 25 along the gas inlet 12 is much smaller than the dimension of the sub-chamber 21 along the gas inlet 12. When the sidewall of the connecting cavity 25 near the gas inlet 12 is made of a sealing element 24, air can be prevented from flowing directly through the connecting cavity 25 to the gas outlet 14, thereby driving air to flow into the sub-chamber 21 and ensuring the adsorption effect of the adsorbent.

[0060] See Figure 4 In some embodiments, the sub-chamber 21 has a square structure, and the length of the sub-chamber 21 extends along the air intake direction of the gas inlet 12, the width of the sub-chamber 21 extends along a first direction, and the height of the sub-chamber 21 extends along a second direction. The sidewall of the sub-chamber 21 extending along the air intake direction of the gas inlet 12 is configured with a porous structure 23. The sidewall of the sub-chamber 21 near the gas inlet 12 is configured with a porous structure 23, and the sidewall of the sub-chamber 21 away from the gas inlet 12 is made of a sealing element 24. Furthermore, two adjacent sub-chambers 21 are interconnected through a connecting cavity 25, which is located in the middle of the sub-chamber 21 along the air intake direction of the gas inlet 12. The sidewall of the connecting cavity 25 near the gas inlet 12 is configured with a porous structure 23, and the sidewall of the connecting cavity 25 away from the gas inlet 12 is made of a sealing element 24. The dimension of the connecting cavity 25 along the gas inlet 12 is much smaller than the dimension of the sub-chamber 21 along the gas inlet 12. This structure prevents air from flowing directly through the connecting cavity 25 to the gas outlet 14, thereby driving air flow into the sub-chamber 21 and ensuring the adsorption effect of the adsorbent.

[0061] See Figure 5 In some embodiments, multiple sub-chambers 21 are independently arranged, and the sidewalls of the sub-chambers 21 along the gas inlet 12 and along the first direction are configured with porous structures 23. Furthermore, at the end of the sub-chamber 21 away from the gas inlet 12, a sealing element 24 is provided between the sub-chamber 21 and the inner wall of the housing 10, as well as between two adjacent sub-chambers 21, to prevent air from flowing directly through the gap between two sub-chambers 21 to the gas outlet 14.

[0062] See Figure 6In some embodiments, sealing elements 24 are provided at both ends of the sub-chamber 21 along the second direction, that is, sealing elements 24 are provided at both the top and bottom ends of the sub-chamber 21 to seal both ends of the sub-chamber 21 along the second direction. If there is a connecting cavity 25, the sealing elements 24 also seal both ends of the connecting cavity 25 along the second direction. This arrangement can prevent the adsorbent from leaking from the bottom of the sub-chamber 21, and at the same time prevent air from flowing quickly through the top gaps, edge gaps or loose areas of the adsorbent accumulation layer, ensuring that the air can pass through the adsorbent according to the designed path, thereby ensuring the adsorption effect of the adsorbent.

[0063] In some embodiments, workers can open the top sealing element 24 to fill the adsorption element.

[0064] The gas outlet 14 is offset from the vent. This design prevents air from quickly flowing out of the gas outlet 14 after being discharged from the vent, increasing the residence time of air in the receiving cavity 11. This further ensures sufficient contact between the air and the adsorbent, thereby further increasing the carbon dioxide production.

[0065] In some embodiments, a plurality of sub-chambers 21 are spaced apart along a first direction, and two gas outlets 14 are provided on the housing, the two gas outlets 14 being located on two side walls of the housing 10 spaced apart along the first direction.

[0066] In some embodiments, a plurality of sub-chambers 21 are spaced apart along a first direction, and the gas outlet 14 is located on the side wall of the housing 10 corresponding to the gas inlet 12.

[0067] The gas inlet 12 and the gas outlet 14 are located at opposite ends of the support mechanism 20 along the gas inlet 12. This arrangement allows air to flow sequentially between the gas inlet 12, the support mechanism 20, and the gas outlet 14, thereby promoting airflow into the support mechanism 20 and further ensuring the adsorption effect of the adsorbent.

[0068] See Figure 5 and Figure 7 The air capture device also includes an electrode interface 30, which is mounted on the support mechanism 20. The electrode interface 30 is used for electrical connection with the power supply and the adsorbent. With this configuration, the power supply is electrically connected to the adsorbent through the electrode interface 30, causing the adsorbent to generate Joule heat, thereby achieving carbon dioxide desorption. Therefore, the air capture device is suitable for electrically heated desorption methods.

[0069] In some embodiments, the adsorbent is made of a conductive structured adsorbent material.

[0070] In some embodiments, multiple sub-chambers 21 are connected in sequence, and the electrode interface 30 is disposed in the outer sub-chamber 21. With this configuration, when using an electrically heated desorption method, by placing the electrode interface 30 in the outer sub-chamber 21 and electrically connecting the electrode interface 30 to the adsorbent in the outer sub-chamber 21, and electrically connecting the adsorbents in adjacent sub-chambers 21, Joule heating can be achieved in all the adsorbents in the multiple sub-chambers 21. This facilitates the electrical connection of the adsorbents in the multiple sub-chambers 21, reduces the difficulty of electrical connection, and also facilitates the arrangement of the electrode interface 30.

[0071] In some embodiments, when multiple sub-chambers 21 are spaced apart along a first direction, the electrode interface 30 is disposed in the sub-chamber 21 closest to the inner wall of the housing 10, that is, the electrode interface 30 is disposed in the outer sub-chamber 21.

[0072] In some embodiments, to ensure the continuity of the circuit, the air collection device includes at least two electrode interfaces 30. When multiple sub-chambers 21 are connected in sequence, at least one electrode interface 30 is provided on each of the two outermost sub-chambers 21.

[0073] In some embodiments, when the sub-chamber 21 is set independently, at least two electrode interfaces 30 are provided on one sub-chamber 21.

[0074] In some embodiments, the adsorbent is a coating-type adsorbent coated on a sheet or porous substrate.

[0075] See Figure 1 The housing 10 is provided with a regeneration medium inlet 13, which communicates with the receiving cavity 11, and the regeneration medium inlet 13 and the gas inlet 12 are located on the same side of the housing 10. With this arrangement, during the carbon dioxide desorption stage, a regeneration medium, such as hot steam or a hot inert gas, is introduced through the regeneration medium inlet 13. The regeneration medium contacts the surface of the adsorbent, heating the adsorbent and causing carbon dioxide desorption. Furthermore, since the regeneration medium inlet 13 and the gas inlet 12 are located on the same side of the housing 10, the regeneration medium can achieve the same flow effect as air within the carrying mechanism 20.

[0076] In some embodiments, the adsorbent can also be heated by heating the outer wall of the housing 10. Therefore, the air capture device of this application is compatible with different types of adsorbent materials and is easy to couple with different heat sources and power sources such as power grids, renewable energy sources, and steam extraction from power plant turbines, thus having higher process adaptability and scalability.

[0077] In some embodiments, low-grade heat sources such as renewable energy, steam extracted from power plant turbines, and waste heat from industrial processes can be used to provide the steam or heat carrier required for regeneration; combined with Joule heating for rapid heating, the heat and electricity consumption per unit of carbon dioxide capture can be reduced while ensuring carbon dioxide production.

[0078] See Figure 1 The air capture device also includes an induced draft fan 40, a sealing door, and a vacuum unit. The induced draft fan 40 is located on the outside of the housing 10 and is used to blow air into the gas inlet 12. The sealing door is located on the housing 10 and can seal or open the gas inlet 12. The vacuum unit is connected to the gas outlet 14 and is used to evacuate the receiving chamber 11. With this configuration, when carbon dioxide is adsorbed, the gas inlet 12 is opened, and the induced draft fan 40 blows air into the gas inlet 12, facilitating airflow into the carrying mechanism 20, thereby further improving the adsorption effect of the adsorbent. Furthermore, when desorption occurs, the sealing door closes to prevent outside air from re-entering the sub-chamber 21, and the vacuum pump can further reduce the pressure inside the chamber, promote carbon dioxide desorption, and increase the carbon dioxide concentration.

[0079] In some embodiments, both the sealing door and the induced draft fan 40 are located at the gas inlet 12.

[0080] In some embodiments, the gas inlet 12 is connected to one end of the connecting pipe, the induced draft fan 40 is connected to the other end of the connecting pipe, and a sealing door is provided in the connecting pipe, which can seal or open the connecting pipe.

[0081] The use of multiple sub-chambers 21 reduces the pressure drop inside the support structure 20. Pressure drop refers to the pressure difference between the gas inlet 12 or regeneration medium inlet 13 and the gas outlet 14 caused by resistance such as friction with the particle surface and pore throttling when the fluid flows through the adsorbent. The magnitude of the pressure drop directly reflects the resistance of the fluid flowing through the support structure 20. The greater the pressure drop, the more energy the power equipment such as the induced draft fan 40 needs to consume to drive the fluid flow, resulting in higher operating costs. Therefore, in this application, the power consumption of the induced draft fan 40 can be reduced, thereby lowering operating costs.

[0082] In some embodiments, the air capture device further includes a condenser connected to the gas outlet 14 to condense water vapor in the product gas.

[0083] In some embodiments, the housing 10 may be equipped with an insulation layer or a heating layer.

[0084] In some embodiments, the air capture system includes multiple air capture devices that can operate in parallel for continuous operation. When one air capture device is undergoing desorption and regeneration, the remaining devices are in the adsorption phase. Through reasonable switching control, a continuous adsorption-desorption process can be established, achieving a continuous carbon dioxide production stream. Furthermore, the modular design of the air capture devices facilitates large-scale engineering applications and improves economic efficiency. It also facilitates maintenance and adsorbent replacement, reduces the footprint and equipment investment of the air capture system, and improves overall capture efficiency and economy.

[0085] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0086] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An air collection device, characterized in that, The air capture device includes: The housing (10) is provided with a receiving cavity (11) and a gas inlet (12) and a gas outlet (14) communicating with the receiving cavity (11). The carrier mechanism (20) is disposed in the receiving cavity (11). The carrier mechanism (20) is provided with multiple sub-chambers (21). Each of the multiple sub-chambers (21) is connected to the gas inlet (12) and each of the multiple sub-chambers (21) is connected to the gas outlet (14). The sub-chambers (21) are used to carry the adsorbent.

2. The air collection device according to claim 1, characterized in that, There is a gas passage (22) between two adjacent sub-chambers (21), the gas passage (22) is connected to the corresponding two sub-chambers (21), and the gas passage (22) is connected to the gas inlet (12).

3. The air collection device according to claim 2, characterized in that, The sub-chamber (21) and the gas channel (22) are arranged alternately along a first direction. The sub-chamber (21) has a vent on the side near the gas channel (22) to connect the sub-chamber (21) and the gas channel (22). The first direction is perpendicular to the gas inlet (12) direction.

4. The air collection device according to claim 3, characterized in that, The sidewall of the sub-chamber (21) extending along the gas inlet (12) is configured as a porous structure (23); and / or, The sidewalls of the sub-chamber (21) extending along the first direction are configured as porous structures (23). The porous structure (23) has multiple air vents.

5. The air collection device according to claim 3, characterized in that, The gas outlet (14) is offset from the vent.

6. The air collection device according to claim 1, characterized in that, The gas inlet (12) and the gas outlet (14) are located at the two ends of the bearing mechanism (20) along the gas inlet (12).

7. The air collection device according to claim 1, characterized in that, The air capture device also includes: An electrode interface (30) is disposed on the support mechanism (20), and the electrode interface (30) is used to electrically connect to the power supply and the adsorbent.

8. The air collection device according to claim 7, characterized in that, The multiple sub-chambers (21) are connected in sequence, and the electrode interface (30) is located in the outer sub-chamber (21).

9. The air collection device according to claim 1, characterized in that, The housing (10) is provided with a regeneration medium inlet (13), which is connected to the receiving cavity (11), and the regeneration medium inlet (13) and the gas inlet (12) are located on the same side of the housing (10).

10. The air collection device according to claim 1, characterized in that, The air capture device also includes: An induced draft fan (40) is disposed on the outside of the housing (10) for blowing air into the gas inlet (12); A sealing door is provided in the housing (10), and the sealing door can block or open the gas inlet (12). A vacuum element, connected to the gas outlet (14), is used to evacuate the containment cavity (11).

Images