Carbon dioxide recovery device, air-conditioning ventilation system, and carbon dioxide recovery method

Abstract

A carbon dioxide recovery device (1) is provided with a storage unit (10), a recovery unit (30), and an adsorption unit (20). An adsorption space (25) is formed inside the adsorption part (20). The adsorption unit (20) is provided with an inlet (26) through which a gas (43) containing carbon dioxide flows into the adsorption space (25). The adsorbent (40) falls into the adsorption space (25) from the storage section (10) toward the recovery section (30) by the weight of the adsorbent (40). The gas (43) is introduced into the adsorption space (25) through the inlet (26) in a direction intersecting the falling direction of the adsorbent (40). The adsorbent (40) adsorbs carbon dioxide contained in the gas (43) in the adsorption space (25).

Description

Technical Field

[0001] The present invention relates to a carbon dioxide recovery device, an air conditioning ventilation system and a carbon dioxide recovery method. Background Art

[0002] Japanese Patent Application Publication No. 2014-516785 (Patent Document 1) discloses a reactor for removing carbon dioxide contained in a gas. Specifically, carbon dioxide contained in a gas is adsorbed by microbeads to remove carbon dioxide from the gas.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application No. 2014-516785 Summary of the invention

[0006] Problems to be solved by the invention

[0007] In the reactor disclosed in patent document 1, the flow direction of the gas is opposite to the falling direction of the microbeads. Therefore, the flow resistance of the gas from the microbeads is large. In order to make the gas flow in the reactor, it is necessary to increase the pressure of the gas flowing into the reactor, or increase the size of the cross section of the reactor perpendicular to the flow direction of the gas. However, if the pressure of the gas flowing into the reactor is increased, the reactor of patent document 1 can only be applied to high-pressure gases such as steam discharged from power plants. In addition, if the size of the reactor is increased, a vast land is required to set up the reactor of patent document 1.

[0008] The present disclosure is completed in view of the above-mentioned problems. The first aspect of the present disclosure aims to provide a carbon dioxide recovery device and an air conditioning ventilation system, which can also be applied to gases with lower pressures and can be further miniaturized. The second aspect of the present disclosure aims to provide a carbon dioxide recovery method, which can also be applied to gases with lower pressures and can miniaturize the carbon dioxide recovery device.

[0009] Means for solving problems

[0010] The carbon dioxide recovery device disclosed in the present invention includes a storage unit for accommodating an adsorbent, a recovery unit for recovering the adsorbent, and an adsorption unit. An adsorption space is formed inside the adsorption unit. An inlet is provided in the adsorption unit for allowing gas containing carbon dioxide to flow into the adsorption space. The adsorption unit is arranged between the storage unit and the recovery unit. The adsorbent falls from the storage unit toward the recovery unit in the adsorption space by its own weight. The gas is introduced into the adsorption space through the inlet in a direction intersecting with the falling direction of the adsorbent. The adsorbent adsorbs carbon dioxide contained in the gas in the adsorption space.

[0011] The air conditioning ventilation system of the present disclosure includes the carbon dioxide recovery device of the present disclosure.

[0012] The carbon dioxide recovery method disclosed in the present invention comprises the following steps: in the adsorption space of the adsorption part, an adsorbent is made to fall by its own weight, and the adsorbent is made to contact with a gas containing carbon dioxide, so that the adsorbent adsorbs the carbon dioxide contained in the gas. The gas is introduced into the adsorption space in a direction intersecting with the falling direction of the adsorbent. The carbon dioxide recovery method disclosed in the present invention also comprises the step of recovering the adsorbent adsorbed with carbon dioxide.

[0013] Effects of the Invention

[0014] In the carbon dioxide recovery device and air conditioning ventilation system disclosed in the present invention, the gas is introduced into the adsorption space in a direction intersecting the falling direction of the adsorbent. Therefore, the flow resistance of the gas from the adsorbent is reduced. The carbon dioxide recovery device and air conditioning ventilation system disclosed in the present invention can also be applied to gases with lower pressures and can be further miniaturized.

[0015] In the carbon dioxide recovery method disclosed in the present invention, the gas is introduced into the adsorption space in a direction intersecting the falling direction of the adsorbent. Therefore, the flow resistance of the gas from the adsorbent is reduced. The carbon dioxide recovery method disclosed in the present invention can also be applied to gases with lower pressures. According to the carbon dioxide recovery method disclosed in the present invention, the carbon dioxide recovery device can be further miniaturized. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the carbon dioxide recovery device according to the first embodiment.

[0017] Figure 2 The carbon dioxide recovery device of the first embodiment, Figure 1 A schematic cross-sectional view taken along the cutting line II-II is shown.

[0018] Figure 3 This is a schematic diagram of the carbon dioxide recovery device according to the first embodiment.

[0019] Figure 4 The carbon dioxide recovery device of the first embodiment, Figure 3 A schematic cross-sectional view taken along the cutting line IV-IV is shown.

[0020] Figure 5 This is a schematic diagram of the carbon dioxide recovery device according to the first embodiment.

[0021] Figure 6 The carbon dioxide recovery device of the first embodiment, Figure 5 A schematic cross-sectional view taken along the cutting line VI-VI is shown.

[0022] Figure 7 This is a schematic cross-sectional view of a carbon dioxide recovery device according to a first modified example of Embodiment 1.

[0023] Figure 8 This is a schematic cross-sectional view of a carbon dioxide recovery device according to a second modified example of the first embodiment.

[0024] Fig. 9 This is a schematic cross-sectional view of a carbon dioxide recovery device according to a third modified example of the first embodiment.

[0025] Fig.10 This is a schematic cross-sectional view of a carbon dioxide recovery device according to a fourth modified example of Embodiment 1.

[0026] Fig.11 This is a schematic cross-sectional view of a carbon dioxide recovery device according to a fifth modified example of Embodiment 1.

[0027] Fig.12 This is a schematic diagram showing a first installation example of the carbon dioxide recovery device according to the first embodiment.

[0028] Fig.13 This is a schematic diagram showing a second installation example of the carbon dioxide recovery device according to the first embodiment.

[0029] Fig.14 This is a schematic diagram showing a third installation example of the carbon dioxide recovery device according to the first embodiment.

[0030] Fig.15 This is a schematic diagram of a carbon dioxide recovery device according to the second embodiment.

[0031] Fig.16 This is a schematic diagram of a carbon dioxide recovery device according to the second embodiment.

[0032] Fig.17 This is a schematic diagram of a carbon dioxide recovery device according to the second embodiment.

[0033] Fig.18 This is a schematic diagram of a carbon dioxide recovery device according to a third embodiment.

[0034] Fig.19This is a schematic diagram of a carbon dioxide recovery device according to a third embodiment.

[0035] Fig. 20 This is a schematic diagram of a transport container included in the carbon dioxide recovery device according to the third embodiment.

[0036] Fig.21 The transport container included in the carbon dioxide recovery device of the third embodiment, Fig. 20 A schematic cross-sectional view taken along the section line XXI-XXI is shown.

[0037] Fig. 22 This is a schematic diagram of a carbon dioxide recovery device according to a third embodiment.

[0038] Fig.23 This is a schematic diagram of a transport container included in the carbon dioxide recovery device according to the third embodiment.

[0039] Fig.24 The transport container included in the carbon dioxide recovery device of the third embodiment, Fig.23 A schematic cross-sectional view taken along the cutting line XXIV-XXIV is shown.

[0040] Fig.25 This is a schematic diagram of a carbon dioxide recovery device according to a third embodiment.

[0041] Fig.26 This is a schematic diagram of a carbon dioxide recovery device according to a fourth embodiment.

[0042] Fig. 27 This is a schematic diagram of a carbon dioxide recovery device according to a fourth embodiment.

[0043] Fig.28 This is a schematic diagram of a carbon dioxide recovery device according to a fourth embodiment.

[0044] Fig.29 This is a schematic diagram of a carbon dioxide recovery device according to a fourth embodiment.

[0045] Fig.30 This is a schematic diagram of a carbon dioxide recovery device according to a fourth embodiment.

[0046] Fig.31 This is a schematic diagram of a carbon dioxide recovery device according to a fourth embodiment.

[0047] Fig.32 This is a schematic diagram of a carbon dioxide recovery device according to a fourth embodiment.

[0048] Fig.33 This is a schematic diagram of a carbon dioxide recovery device according to a fourth embodiment.

[0049] Fig.34This is a schematic diagram of a carbon dioxide recovery device according to a modified example of the fourth embodiment.

[0050] Fig.35 This is a schematic diagram of a carbon dioxide recovery device according to a modified example of the fourth embodiment.

[0051] Fig.36 This is a schematic diagram of a carbon dioxide recovery device according to a modified example of the fourth embodiment.

[0052] Fig.37 This is a schematic diagram of a carbon dioxide recovery device according to a modified example of the fourth embodiment.

[0053] Fig.38 This is a schematic diagram of a carbon dioxide recovery device according to a modified example of the fourth embodiment.

[0054] Fig.39 This is a schematic diagram of a carbon dioxide recovery device according to a modified example of the fourth embodiment.

[0055] Fig.40 This is a schematic diagram of a carbon dioxide recovery device according to a modified example of the fourth embodiment.

[0056] Fig.41 This is a schematic cross-sectional view of a carbon dioxide recovery device according to a fifth embodiment.

[0057] Fig.42 This is a schematic cross-sectional view of a carbon dioxide recovery device according to a fifth embodiment.

[0058] Fig.43 This is a schematic cross-sectional view of a carbon dioxide recovery device according to a fifth embodiment.

[0059] Fig.44 This is a schematic cross-sectional view of a carbon dioxide recovery device according to a first modified example of Embodiment 5.

[0060] Fig.45 This is a schematic cross-sectional view of a carbon dioxide recovery device according to a second modified example of Embodiment 5.

[0061] Fig.46 This is a schematic cross-sectional view of a carbon dioxide recovery device according to a second modified example of Embodiment 5. DETAILED DESCRIPTION

[0062] Hereinafter, the embodiments of the present disclosure will be described. It should be noted that the same reference numerals are given to the same structures, and the description thereof will not be repeated.

[0063] Implementation method 1.

[0064] Reference Figures 1 to 6Next, a carbon dioxide recovery device 1 according to Embodiment 1 will be described. The carbon dioxide recovery device 1 includes a storage unit 10 , an adsorption unit 20 , and a recovery unit 30 .

[0065] The storage unit 10 contains an adsorbent 40. The adsorbent 40 can adsorb carbon dioxide. The adsorbent 40 is, for example, a solid absorbent supported by amine, zeolite, silica gel, diatomaceous earth, alumina, or activated carbon. The adsorbent 40 is not particularly limited, and has, for example, a spherical or cylindrical shape. Figures 1 to 6 The more carbon dioxide is adsorbed by the adsorbent 40 , the higher the black density of the adsorbent 40 . The storage unit 10 is disposed above the adsorption unit 20 .

[0066] The storage part 10 includes a storage body 11 and a valve 14. Inside the storage body 11, a storage space 12 for storing an adsorbent 40 is formed. An opening 13 is provided in the storage body 11 (specifically, at the bottom of the storage body 11). The opening 13 is connected to the storage space 12 and the adsorption space of the adsorption part 20. The valve 14 opens and closes the opening 13. When the valve 14 closes the opening 13, the adsorbent 40 is stored in the storage part 10. When the valve 14 opens the opening 13, the adsorbent 40 falls toward the adsorption space of the adsorption part 20 by its own weight.

[0067] The adsorption unit 20 is disposed between the storage unit 10 and the recovery unit 30. In the adsorption unit 20, the adsorbent 40 contacts the gas 43 containing carbon dioxide and adsorbs carbon dioxide contained in the gas 43. The gas 43 is not particularly limited as long as it is a gas containing carbon dioxide, and is, for example, air.

[0068] Specifically, the adsorption portion 20 includes a front wall 21, a rear wall 22 on the side opposite to the front wall 21, a side wall 23, and a side wall 24 on the side opposite to the side wall 23. The side walls 23 and 24 are connected to the front wall 21 and the rear wall 22, respectively. An adsorption space 25 is formed inside the adsorption portion 20. The front wall 21, the rear wall 22, and the side walls 23 and 24 define the adsorption space 25. Figure 1 as well as Figure 2 As shown, the front wall 21 has a width wider than each of the side walls 23 and 24. The rear wall 22 has a width wider than each of the side walls 23 and 24. In this specification, the width of the front wall 21 is the length of the front wall 21 in the direction (y direction) perpendicular to the falling direction (-z direction) of the adsorption portion 20. The width of the rear wall 22 is the length of the rear wall 22 in the direction (y direction) perpendicular to the falling direction (-z direction) of the adsorption portion 20. The width of the side wall 23 is the length of the side wall 23 in the direction (x direction) perpendicular to the falling direction (-z direction) of the adsorption portion 20. The width of the side wall 24 is the length of the side wall 24 in the direction (x direction) perpendicular to the falling direction (-z direction) of the adsorption portion 20.

[0069] An opening 26 is provided in the adsorption portion 20 (specifically, the front wall 21). The gas 43 containing carbon dioxide flows into the adsorption space 25 through the opening 26. In the present embodiment, the opening 26 is an inlet for the gas 43. The width of the opening 26 is, for example, greater than 60% and less than 100% of the width of the front wall 21. The width of the opening 26 may also be greater than 80% and less than 95% of the width of the front wall 21. In the present specification, the width of the opening 26 is the length of the opening 26 in the direction (y direction) perpendicular to the falling direction (-z direction) of the adsorption portion 20. In the present embodiment, a plurality of openings 26 are provided in the adsorption portion 20, but it is sufficient that at least one opening 26 is provided in the adsorption portion 20.

[0070] An opening 27 is provided in the adsorption portion 20 (specifically, the rear wall 22). The gas 43 flows out from the adsorption space 25 through the opening 27. In the present embodiment, the opening 27 is an outflow port for the gas 43. The width of the opening 27 is, for example, greater than 60% and less than 100% of the width of the rear wall 22. In the present specification, the width of the opening 27 is the length of the opening 27 in the direction (y direction) perpendicular to the falling direction (-z direction) of the adsorption portion 20. In the present embodiment, a plurality of openings 27 are provided in the adsorption portion 20, but it is sufficient as long as at least one opening 27 is provided in the adsorption portion 20. The opening 27 is, for example, opposite to the opening 26 in the direction (x direction) perpendicular to the falling direction (-z direction) of the adsorption portion 20.

[0071] The adsorbent 40 falls from the storage unit 10 toward the recovery unit 30 in the adsorption space 25 by its own weight. The falling direction (-z direction) of the adsorbent 40 is, for example, the direction of gravity. The gas 43 is introduced into the adsorption space 25 through the opening 26 in a direction (for example, +x direction) intersecting the falling direction (for example, -z direction) of the adsorbent 40. The adsorbent 40 contacts the gas 43 in the adsorption space 25 and adsorbs carbon dioxide contained in the gas 43. The gas 43 from which carbon dioxide has been removed by the adsorbent 40 flows out of the adsorption space 25 through the opening 27.

[0072] The larger the size of the adsorption portion 20 in the falling direction of the adsorbent 40 (for example, the -z direction), the longer the time that the adsorbent 40 is in contact with the gas 43, and the carbon dioxide can be more efficiently adsorbed by the adsorbent 40. Therefore, when the concentration of carbon dioxide contained in the gas 43 is low, the size of the adsorption portion 20 in the falling direction of the adsorbent 40 (for example, the -z direction) is increased. When the concentration of carbon dioxide contained in the gas 43 is high, the size of the adsorption portion 20 in the falling direction of the adsorbent 40 (for example, the -z direction) can also be reduced.

[0073] The recovery unit 30 recovers the adsorbent 40 that adsorbs the carbon dioxide contained in the gas 43. The recovery unit 30 is arranged below the adsorption unit 20. The recovery unit 30 includes a recovery body 31. Inside the recovery body 31, a recovery space 32 for accommodating the adsorbent 40 that adsorbs the carbon dioxide is formed. An opening 33 is provided in the recovery body 31 (specifically, the top of the recovery body 31). The opening 33 is connected to the adsorption space 25 and the recovery space 32. The recovery unit 30 can also be loaded and unloaded relative to the adsorption unit 20.

[0074] Reference Figures 1 to 6 , the operation of the carbon dioxide recovery device 1 and the carbon dioxide recovery method according to the present embodiment will be described.

[0075] like Figure 1 as well as Figure 2 As shown, the valve 14 closes the opening 13. The adsorbent 40 is stored in the storage portion 10.

[0076] like Figure 3 as well as Figure 4 As shown, the valve 14 opens the opening 13. The adsorbent 40 falls toward the adsorption space 25 of the adsorption section 20 by its own weight. In the adsorption section 20, the adsorbent 40 falls in the adsorption space 25 from the storage section 10 toward the recovery section 30 by its own weight. The gas 43 is introduced into the adsorption space 25 through the opening 26 in a direction (e.g., +x direction) intersecting the falling direction (e.g., -z direction) of the adsorbent 40. The adsorbent 40 contacts the gas 43 in the adsorption space 25 and adsorbs carbon dioxide contained in the gas 43. The gas 43 from which carbon dioxide has been removed by the adsorbent 40 flows out of the adsorption space 25 through the opening 27.

[0077] The adsorbent 40 that has adsorbed the carbon dioxide contained in the gas 43 falls from the adsorption unit 20 toward the recovery unit 30 by its own weight. Figure 5 as well as Figure 6 As shown, the adsorbent 40 having adsorbed carbon dioxide is received in the recovery space 32 of the recovery unit 30 through the opening 33. The adsorbent 40 having adsorbed carbon dioxide is recovered by the recovery unit 30.

[0078] (Variation Example)

[0079] like Figure 7As shown, in the carbon dioxide recovery device 1 of the first modified example of the present embodiment, one opening 26 is provided in the adsorption part 20 (specifically, the front wall 21), and one opening 27 is provided in the adsorption part 20 (specifically, the rear wall 22). The opening 27 is staggered relative to the corresponding opening 26 in the falling direction of the adsorbent 40 (for example, the -z direction). Depending on the flow direction of the gas 43, sometimes the opening 26 functions as the inlet of the gas 43 and the opening 27 functions as the outlet of the gas 43, and sometimes the opening 27 functions as the inlet of the gas 43 and the opening 26 functions as the outlet of the gas 43.

[0080] like Figure 8 As shown, in the carbon dioxide recovery device 1 of the second modified example of the present embodiment, one opening 26 and one opening 27 are provided on the front wall 21 of the adsorption part 20. The opening 27 is staggered relative to the corresponding opening 26 in the falling direction of the adsorbent 40 (for example, the -z direction). Depending on the flow direction of the gas 43, sometimes the opening 26 functions as the inlet of the gas 43 and the opening 27 functions as the outlet of the gas 43, and sometimes the opening 27 functions as the inlet of the gas 43 and the opening 26 functions as the outlet of the gas 43. The carbon dioxide recovery device 1 of the second modified example of the present embodiment is suitable for being provided on a wall (not shown).

[0081] like Fig. 9 As shown, in the carbon dioxide recovery device 1 of the third variant of the present embodiment, an opening 28 is provided on the front wall 21 of the adsorption part 20. The opening 28 is larger than the openings 26 and 27, respectively. The opening 28 functions as an inlet and an outlet for the gas 43. Depending on the flow direction of the gas 43, sometimes the upper part of the opening 28 functions as the inlet of the gas 43, and the lower part of the opening 28 functions as the outlet of the gas 43, and sometimes the lower part of the opening 28 functions as the inlet of the gas 43, and the upper part of the opening 28 functions as the outlet of the gas 43. The carbon dioxide recovery device 1 of the third variant of the present embodiment is suitable for being set on a wall (not shown).

[0082] like Fig.10 As shown, in the carbon dioxide recovery device 1 of the fourth modified example of the present embodiment, the adsorption unit 20 includes an eaves 29 provided above each of the openings 26 and 27. The eaves 29 prevent rain, snow or sunlight from entering the adsorption space 25. The eaves 29 may also be provided above one of the openings 26 or 27.

[0083] like Fig.11As shown, in the carbon dioxide recovery device 1 of the fifth modified example of the present embodiment, the adsorption section 20 includes a mesh 46 that allows the gas 43 to pass but does not allow the adsorbent 40 to pass. The mesh 46 covers the opening 27. The mesh 46 is not particularly limited and is formed of a metal such as stainless steel. The mesh 46 can also cover the opening 26. By covering both the opening 26 and the opening 27 with the mesh 46, even if the gas 43 flows into the adsorption section 20 from all directions, it is possible to prevent the adsorbent 40 from being washed away by the gas 43 and leaving the adsorption section 20.

[0084] (Installation example of carbon dioxide recovery device 1)

[0085] like Figure 12 to Figure 14 As shown, the carbon dioxide recovery device 1 is installed in, for example, a building 50. The building 50 includes a side wall 51 and a roof 52. The building 50 is not particularly limited, and is, for example, a high-rise building or an apartment.

[0086] Specifically, if Fig.12 As shown, in the first installation example of this embodiment, the carbon dioxide recovery device 1 is installed on the side wall 51 of the building 50. Fig.13 As shown, in the second installation example of the present embodiment, the carbon dioxide recovery device 1 is installed on the roof 52 of the building 50. In this way, by installing the carbon dioxide recovery device 1 outdoors, the gas 43 flows into the adsorption part 20 by the wind blowing outdoors, so that the carbon dioxide recovery device 1 can recover the carbon dioxide contained in the gas 43.

[0087] like Fig.14 As shown, in the third setting example of the present embodiment, the carbon dioxide recovery device 1 is arranged in front of the air inlet 56 of the air-conditioning outdoor unit 55. In order to facilitate the installation of the carbon dioxide recovery device 1, the carbon dioxide recovery device 1 can also be supported by the air-conditioning outdoor unit 55. The air-conditioning outdoor unit 55 is not particularly limited, for example, it is arranged outdoors such as the roof 52 of the building 50. The air-conditioning outdoor unit 55 is provided with an air inlet 56 and an air outlet 57. The carbon dioxide recovery device 1 and the air-conditioning outdoor unit 55 are included in the air-conditioning ventilation system 2 of the present embodiment. In this specification, the air-conditioning ventilation system 2 refers to a system that performs air conditioning, ventilation, or both air conditioning and ventilation of the building 50.

[0088] Effects of the carbon dioxide recovery device 1, the air-conditioning ventilation system 2, and the carbon dioxide recovery method according to the present embodiment will be described.

[0089] The carbon dioxide recovery device 1 of the present embodiment includes a storage section 10 for accommodating an adsorbent 40, a recovery section 30 for recovering the adsorbent 40, and an adsorption section 20. An adsorption space 25 is formed inside the adsorption section 20. An inlet (for example, an opening 26) is provided in the adsorption section 20 for allowing a gas 43 containing carbon dioxide to flow into the adsorption space 25. The adsorption section 20 is arranged between the storage section 10 and the recovery section 30. The adsorbent 40 falls in the adsorption space 25 from the storage section 10 toward the recovery section 30 by the weight of the adsorbent 40. The gas 43 is introduced into the adsorption space 25 through the inlet in a direction intersecting with the falling direction of the adsorbent 40. The adsorbent 40 adsorbs the carbon dioxide contained in the gas 43 in the adsorption space 25.

[0090] In the carbon dioxide recovery device 1, the gas 43 is introduced into the adsorption space 25 in a direction intersecting with the falling direction of the adsorbent 40. Therefore, the flow resistance of the gas 43 from the adsorbent 40 is reduced. The carbon dioxide recovery device 1 can also be applied to a gas 43 with a lower pressure, and can be further miniaturized. In addition, the adsorbent 40 falls from the storage part 10 toward the recovery part 30 in the adsorption space 25 by the own weight of the adsorbent 40. Therefore, the power used to transport the adsorbent 40 from the storage part 10 to the recovery part 30 (for example, the power used by the air transport device for transporting the adsorbent 40) can be reduced.

[0091] In the carbon dioxide recovery device 1 of the present embodiment, the storage unit 10 is arranged above the adsorption unit 20 , and the recovery unit 30 is arranged below the adsorption unit 20 .

[0092] Therefore, the adsorbent 40 falls from the storage unit 10 to the recovery unit 30 through the adsorption unit 20 by the weight of the adsorbent 40. The electric power for transporting the adsorbent 40 from the storage unit 10 to the recovery unit 30 can be reduced.

[0093] In the carbon dioxide recovery device 1 of the present embodiment, the storage unit 10 includes a storage body 11 and a first valve (valve 14). A storage space 12 for storing an adsorbent 40 is formed inside the storage body 11. A first opening (opening 13) is provided in the storage body 11. The first opening is connected to the storage space 12 and the adsorption space 25. The first valve opens and closes the first opening.

[0094] Therefore, after a sufficient amount of adsorbent 40 is stored in the storage unit 10, the first valve (valve 14) can supply a sufficient amount of adsorbent 40 to the adsorption unit 20. Carbon dioxide contained in the gas 43 can be recovered more efficiently.

[0095] In the carbon dioxide recovery device 1 of the present embodiment, the adsorption part 20 includes a first wall (front wall 21) and a second wall (side wall 23) connected to the first wall. The first wall and the second wall define a part of the adsorption space 25. The first wall has a width wider than the second wall. An inlet (e.g., an opening 26) is provided in the first wall.

[0096] Therefore, the area of ​​the inlet (for example, the opening 26) increases. More gas 43 can be introduced into the adsorption space 25 through the inlet. Carbon dioxide contained in the gas 43 can be recovered more efficiently.

[0097] In the carbon dioxide recovery device 1 of the present embodiment, the width of the inlet (for example, the opening 26 ) is 60% or more and 100% or less of the width of the first wall (front wall 21 ).

[0098] Therefore, the area of ​​the inlet (for example, the opening 26) increases. More gas 43 can be introduced into the adsorption space 25 through the inlet. Carbon dioxide contained in the gas 43 can be recovered more efficiently.

[0099] In the carbon dioxide recovery device 1 of the present embodiment, the adsorption unit 20 includes a flange portion 29 provided above the inlet (for example, the opening 26 ).

[0100] The eaves 29 prevents rain, snow, or sunlight from entering the adsorption space 25. Therefore, it is possible to prevent rain or snow from coming into contact with the adsorbent 40, or to prevent the adsorbent 40 from being irradiated by sunlight. It is possible to prevent the adsorption capacity of the adsorbent 40 from being reduced due to rain, snow, or sunlight. The carbon dioxide contained in the gas 43 can be recovered more efficiently over a longer period of time.

[0101] In the carbon dioxide recovery device 1 of this embodiment, the adsorption unit 20 includes a mesh 46 that allows the gas 43 to pass but does not allow the adsorbent 40 to pass. The adsorption unit 20 is provided with an outflow port (for example, opening 27) for the gas 43 to flow out of the adsorption space 25. The mesh 46 covers the outflow port.

[0102] The net 46 allows the gas 43 from which carbon dioxide has been removed by the adsorbent 40 to pass therethrough, and prevents the adsorbent 40 from being washed away by the gas 43 and leaving the adsorption unit 20 through the outflow port (for example, the opening 27 ).

[0103] The carbon dioxide recovery device 1 of the present embodiment is installed on the roof 52 or the side wall 51 of the building 50 .

[0104] The flow rate of the outside air on the roof 52 of the building 50 is often higher than that of the outside air on the ground. By installing the carbon dioxide recovery device 1 on the roof 52 of the building 50, more gas 43 can be introduced into the adsorption space 25. The carbon dioxide contained in the gas 43 can be recovered more efficiently.

[0105] By installing the carbon dioxide recovery device 1 on the side wall 51 of the building 50, the size of the adsorption part 20 in the falling direction of the adsorbent 40 becomes larger, and the flow of the external air can be used to introduce the gas 43 into the adsorption space 25. More gas 43 can be introduced into the adsorption space 25. The carbon dioxide contained in the gas 43 can be recovered more efficiently.

[0106] The air conditioning ventilation system 2 of this embodiment includes a carbon dioxide recovery device 1 and an air conditioning outdoor unit 55. The air conditioning outdoor unit 55 is provided with an air intake port 56. The carbon dioxide recovery device 1 is provided in front of the air intake port 56 of the air conditioning outdoor unit 55.

[0107] Since the air conditioning ventilation system 2 is provided with the carbon dioxide recovery device 1, the air conditioning ventilation system 2 can also be applied to the gas 43 having a lower pressure, and can be further miniaturized. In addition, by arranging the carbon dioxide recovery device 1 in front of the air inlet 56 of the air conditioning outdoor unit 55, the gas 43 can be introduced into the adsorption space 25 by using the flow of the external air generated by the air conditioning outdoor unit 55. The carbon dioxide contained in the gas 43 can be recovered more efficiently. In addition, even if the air conditioning outdoor unit 55 is stopped and the air conditioning outdoor unit 55 does not generate an air flow, the gas 43 will flow into the adsorption part 20 by the wind blowing outside the house, so the carbon dioxide recovery device 1 can recover the carbon dioxide contained in the gas 43.

[0108] The carbon dioxide recovery method of the present embodiment includes the following steps: in the adsorption space 25 of the adsorption unit 20, the adsorbent 40 is dropped by its own weight, the adsorbent 40 is brought into contact with the gas 43 containing carbon dioxide, and the adsorbent 40 adsorbs the carbon dioxide contained in the gas 43. The gas 43 is introduced into the adsorption space 25 in a direction intersecting the falling direction of the adsorbent 40. The carbon dioxide recovery method of the present embodiment further includes the step of recovering the adsorbent 40 adsorbing the carbon dioxide.

[0109] In the carbon dioxide recovery method of the present embodiment, the gas 43 is introduced into the adsorption space 25 in a direction intersecting with the falling direction of the adsorbent 40. Therefore, the flow resistance of the gas 43 from the adsorbent 40 is reduced. The carbon dioxide recovery method of the present embodiment can also be applied to a gas 43 with a lower pressure. In addition, according to the carbon dioxide recovery method of the present embodiment, the carbon dioxide recovery device 1 can be further miniaturized. Moreover, in the carbon dioxide recovery method of the present embodiment, the adsorbent 40 falls in the adsorption space 25 by the own weight of the adsorbent 40. Therefore, the electric power used to transport the adsorbent 40 can be reduced.

[0110] Implementation method 2.

[0111] Reference Figures 15 to 17 Next, a carbon dioxide recovery device 1b according to Embodiment 2 will be described. The carbon dioxide recovery device 1b according to this embodiment has the same structure as the carbon dioxide recovery device 1 according to Embodiment 1, but is different from the carbon dioxide recovery device 1 according to Embodiment 1 mainly in the following points.

[0112] In the carbon dioxide recovery device 1b, the storage body 11 includes an inclined bottom plate 11b. The inclined bottom plate 11b defines the bottom of the storage body 11. The inclined bottom plate 11b gradually descends toward the opening 13. When the valve 14 closes the opening 13, the adsorbent 40 is located on the inclined bottom plate 11b and the valve 14.

[0113] The carbon dioxide recovery device 1b further includes a plurality of inclined plates 61 and 62. The carbon dioxide recovery device 1b only needs to include at least one inclined plate. The inclined plates 61 and 62 are arranged in the adsorption space 25. The inclined plates 61 and 62 are inclined with respect to the horizontal plane (xy plane).

[0114] The inclined plate 61 includes an end 61a and an end 61b on the side opposite to the end 61a. The end 61a is fixed to the adsorption portion 20 (specifically, the side wall 23). The end 61b is separated from the adsorption portion 20 (specifically, the side wall 24), and a gap is formed between the end 61b and the adsorption portion 20 (specifically, the side wall 24). The end 61a is located above the end 61b. The distance between the end 61a and the storage portion 10 is smaller than the distance between the end 61b and the storage portion 10. The inclined plate 62 includes an end 62a and an end 62b on the side opposite to the end 62a. The end 62a is fixed to the adsorption portion 20 (specifically, the side wall 24). The end 62b is separated from the adsorption portion 20 (specifically, the side wall 23), and a gap is formed between the end 62b and the adsorption portion 20 (specifically, the side wall 23). The end 62a is located above the end 62b. The distance between the end portion 62 a and the storage portion 10 is smaller than the distance between the end portion 62 b and the storage portion 10 .

[0115] The adsorbent 40 rolls on the inclined plates 61 and 62 by its own weight. Therefore, the adsorbent 40 can contact the gas 43 over a larger surface area. The time for which the adsorbent 40 contacts the gas 43 is prolonged. More carbon dioxide is adsorbed by the adsorbent 40. The adsorbent 40 may have any shape as long as it can roll on the inclined plates 61 and 62, such as a spherical or cylindrical shape.

[0116] Reference Figures 15 to 17 , the operation of the carbon dioxide recovery device 1b and the carbon dioxide recovery method of this embodiment will be described.

[0117] like Fig.15 As shown, the valve 14 closes the opening 13. Figure 1 as well as Figure 2 In the same manner as in the process shown, the adsorbent 40 is stored in the storage portion 10 . The adsorbent 40 is located on the inclined bottom plate 11 b and the valve 14 .

[0118] like Fig.16 As shown, the valve 14 opens the opening 13. The adsorbent 40 falls toward the adsorption space 25 of the adsorption section 20 by the self-weight of the adsorbent 40. In the adsorption section 20, the adsorbent 40 falls toward the recovery section 30 while rolling on the inclined plates 61 and 62 by the self-weight of the adsorbent 40. Specifically, the adsorbent 40 rolls on the inclined plate 61 toward the end 61b by the self-weight of the adsorbent 40. The adsorbent 40 falls onto the inclined plate 62 from the gap between the end 61b and the adsorption section 20 (specifically, the side wall 24) by the self-weight of the adsorbent 40. The adsorbent 40 rolls on the inclined plate 62 toward the end 62b by the self-weight of the adsorbent 40. The adsorbent 40 falls onto the inclined plate 61 from the gap between the end 62b and the adsorption section 20 (specifically, the side wall 23) by the self-weight of the adsorbent 40.

[0119] The gas 43 is introduced into the adsorption space 25 through the opening 26 in a direction (e.g., +x direction) intersecting the falling direction (e.g., -z direction) of the adsorbent 40. The adsorbent 40 contacts the gas 43 while rolling on the inclined plates 61 and 62 in the adsorption space 25, and adsorbs carbon dioxide contained in the gas 43. The gas 43 from which carbon dioxide has been removed by the adsorbent 40 passes through the opening 27 (see Figure 2 , Figure 4 as well as Figure 6 ) flows out from the adsorption space 25.

[0120] The adsorbent 40 that has adsorbed carbon dioxide contained in the gas 43 falls toward the recovery unit 30 from the inclined plate (inclined plate 62) of the inclined plates 61 and 62 that is closest to the recovery unit 30 by its own weight. Specifically, it falls toward the recovery unit 30 from the gap between the inclined plate (e.g., inclined plate 62) of the inclined plates 61 and 62 that is closest to the recovery unit 30 and the adsorption unit 20 (e.g., side wall 23). Fig.17 As shown, the adsorbent 40 having adsorbed carbon dioxide is received in the recovery space 32 of the recovery unit 30 through the opening 33. The adsorbent 40 having adsorbed carbon dioxide is recovered by the recovery unit 30.

[0121] The carbon dioxide recovery device 1 b and the carbon dioxide recovery method of the present embodiment provide the following effects in addition to the effects of the carbon dioxide recovery device 1 and the carbon dioxide recovery method of the first embodiment.

[0122] The carbon dioxide recovery device 1b of this embodiment further includes at least one inclined plate (for example, inclined plates 61 and 62) disposed in the adsorption space 25 and inclined with respect to the horizontal plane. The adsorbent 40 rolls on the at least one inclined plate by its own weight.

[0123] Since the adsorbent 40 rolls on at least one inclined plate (e.g., inclined plates 61, 62), the surface area of ​​the adsorbent 40 in contact with the gas 43 containing carbon dioxide increases. More carbon dioxide can be adsorbed by the adsorbent 40 in a shorter time. Carbon dioxide can be recovered more efficiently. The carbon dioxide recovery device 1b can be miniaturized.

[0124] In the carbon dioxide recovery device 1b of the present embodiment, at least one inclined plate (e.g., inclined plate 61) includes a first end (e.g., end 61a) fixed to the adsorption part 20 and a second end (e.g., end 61b) on the opposite side to the first end. A first distance between the first end and the storage part 10 is smaller than a second distance between the second end and the storage part 10.

[0125] Therefore, the adsorbent 40 rolls on at least one inclined plate (e.g., inclined plate 61). The surface area of ​​the adsorbent 40 in contact with the gas 43 containing carbon dioxide increases. More carbon dioxide can be adsorbed by the adsorbent 40 in a shorter time. Carbon dioxide can be recovered more efficiently. The carbon dioxide recovery device 1b can be miniaturized.

[0126] In the carbon dioxide recovery device 1 b of the present embodiment, at least one inclined plate is a plurality of inclined plates (for example, the inclined plates 61 and 62 ).

[0127] Therefore, the surface area of ​​the adsorbent 40 in contact with the gas 43 containing carbon dioxide is further increased. The time for which the adsorbent 40 is in contact with the gas 43 is extended. More carbon dioxide can be adsorbed by the adsorbent 40. Carbon dioxide can be recovered more efficiently.

[0128] In the carbon dioxide recovery apparatus 1 b of the present embodiment, the adsorbent 40 has a spherical shape or a cylindrical shape.

[0129] Therefore, the adsorbent 40 rolls on at least one inclined plate (e.g., inclined plates 61, 62). The surface area of ​​the adsorbent 40 in contact with the gas 43 containing carbon dioxide increases. More carbon dioxide can be adsorbed by the adsorbent 40 in a shorter time. Carbon dioxide can be recovered more efficiently.

[0130] In the carbon dioxide recovery method of the present embodiment, causing the adsorbent 40 to drop by its own weight includes rolling the adsorbent 40 on at least one inclined plate (eg, inclined plates 61 , 62 ) disposed in the adsorption space 25 and inclined relative to a horizontal plane.

[0131] Since the adsorbent 40 rolls on at least one inclined plate (e.g., inclined plates 61, 62), the surface area of ​​the adsorbent 40 in contact with the gas 43 containing carbon dioxide increases. More carbon dioxide can be adsorbed by the adsorbent 40 in a shorter time. According to the carbon dioxide recovery method of this embodiment, carbon dioxide can be recovered more efficiently, and the carbon dioxide recovery device 1b can be miniaturized.

[0132] Implementation method 3.

[0133] Reference Figures 18 to 25 Next, a carbon dioxide recovery device 1c according to Embodiment 3 will be described. The carbon dioxide recovery device 1c according to this embodiment has the same structure as the carbon dioxide recovery device 1b according to Embodiment 2, but is different from the carbon dioxide recovery device 1b according to Embodiment 2 mainly in the following points.

[0134] like Fig.18 , Fig.19 , Fig. 22 as well as Fig.25 As shown, in the carbon dioxide recovery device 1c, an opening 16 is provided in the storage part 10. The opening 16 is connected to the storage space 12 and the passage 75 of the transport container 65. An opening 63 is provided in the adsorption part 20, which is connected to the adsorption space 25 and the passage 75 of the transport container 65. The opening 63 faces the lower end of the inclined plate closest to the recovery part 30 (for example, the end 62b of the inclined plate 62) among the inclined plates 61 and 62.

[0135] The adsorption unit 20 includes a valve 64. The valve 64 is disposed at the lower end of the inclined plate closest to the recovery unit 30 of the inclined plates 61 and 62 (for example, the end 62b of the inclined plate 62). The valve 64 can be in the first valve position (refer to Fig.18 as well as Fig.19 ) and the second valve position (refer to Fig. 22 as well as Fig.25 ). Fig.18 as well as Fig.19 As shown, when the valve 64 is in the first valve position, the valve 64 directs the adsorbent 40 to the opening 63 and the transport container 65. Fig. 22 as well as Fig.25 As shown, when the valve 64 is in the second valve position, the valve 64 directs the adsorbent 40 to the opening 33 and the recovery portion 30 .

[0136] like Figures 18 to 25 As shown, the carbon dioxide recovery device 1c further includes a transport container 65 and a driving device 77. The transport container 65 and the driving device 77 transport the adsorbent 40 adsorbing carbon dioxide from the adsorption unit 20 to the storage unit 10 in order to reuse the adsorbent 40 adsorbing carbon dioxide.

[0137] The transport container 65 includes a box body 66 and a baffle 70. The transport container 65 may further include a spring 73 and an operating rod 74.

[0138] The box 66 has a top surface 66t. A receiving space 67 for receiving the adsorbent 40 is provided inside the box 66. An opening 68 communicating with the receiving space 67 is provided on the box 66. The box 66 includes an inclined bottom surface 69 defining the bottom surface of the receiving space 67. The inclined bottom surface 69 gradually descends toward the opening 68.

[0139] The baffle 70 includes a baffle body 71 and a protrusion 72 protruding from the baffle body 71. The baffle (specifically, the baffle body 71) opens and closes a part of the opening 68 of the compartment 66.

[0140] Specifically, the spring 73 and the operating rod 74 are connected to the protrusion 72. The spring 73 urges the baffle 70 upward. The operating rod 74 includes a lower end 74a and an upper end 74b on the opposite side of the lower end 74a. The lower end 74a of the operating rod 74 is connected to the protrusion 72.

[0141] like Fig.18 as well as Fig.19 As shown, when the transport container 65 is located at the first position, the top surface 66t of the compartment 66 is separated from the top plate 76 of the passage 75 of the transport container 65. Figures 18 to 21 As shown, the shutter 70 is urged upward by the spring 73. Therefore, the shutter 70 (specifically, the shutter body 71) closes a portion of the opening 68 of the box 66. The upper end 74b of the operating rod 74 protrudes from the top surface 66t of the box 66.

[0142] In contrast, Fig. 22 As shown, when the transport container 65 is located at the second position, the top surface 66t of the compartment 66 contacts the top plate 76 of the passage 75 of the transport container 65. Figure 22 to Figure 24 As shown, the operating rod 74 moves downward against the force of the spring 73. The upper end 74b of the operating rod 74 is coplanar with the top surface 66t of the box 66. The spring 73 is compressed. The baffle 70 (specifically, the baffle body 71) opens all the openings 68 of the box 66.

[0143] The transport container 65 is driven by the driving device 77 to move in the passage 75. In this embodiment, the driving device 77 moves the transport container 65 between the first position and the second position. Fig.18 as well as Fig.19 As shown, when the transport container 65 is located at the first position, the transport container 65 faces the adsorption portion 20 (for example, the opening 63). Fig. 22As shown, when the transport container 65 is located at the second position, the transport container 65 faces the storage portion 10 (for example, the opening 16). Specifically, the driving device 77 includes a traction machine 78 and a rope 79. The rope 79 is connected to the transport container 65 (specifically, the body 66) and the traction machine 78. The transport container 65 is raised from the adsorption portion 20 to the storage portion 10, or lowered from the storage portion 10 to the adsorption portion 20 using the traction machine 78 and the rope 79.

[0144] Reference Figures 18 to 25 , the operation of the carbon dioxide recovery device 1c and the carbon dioxide recovery method according to this embodiment will be described.

[0145] like Fig.18 As shown, the valve 14 closes the opening 13. Fig.15 In the same manner as in the illustrated process, the adsorbent 40 is stored in the storage unit 10 .

[0146] like Fig.19 As shown, the valve 14 opens the opening 13. Fig.16 Similarly to the process shown, the adsorbent 40 falls toward the adsorption space 25 of the adsorption unit 20 by its own weight. In the adsorption unit 20, the adsorbent 40 falls toward the recovery unit 30 while rolling on the inclined plates 61 and 62 by its own weight. The adsorbent 40 contacts the gas 43 while rolling on the inclined plates 61 and 62 in the adsorption space 25, and adsorbs carbon dioxide contained in the gas 43.

[0147] like Fig.19 As shown, when the transport container 65 is located at the first position, the adsorbent 40 dropped in the adsorption space 25 is received in the transport container 65. Specifically, the transport container 65 is located at the first position, facing the adsorption portion 20 (for example, the opening 63). The valve 64 is located at the first valve position, guiding the adsorbent 40 to the opening 63 and the transport container 65. The adsorbent 40 adsorbed with carbon dioxide rolls on the valve 64 and is received in the receiving space 67 of the compartment 66 through the opening 63. When the transport container 65 is located at the first position, the baffle 70 (specifically, the baffle body 71) is as shown. Figures 19 to 21 As shown, a part of the opening 68 of the box 66 is closed. Therefore, the adsorbent 40 accommodated in the accommodation space 67 of the box 66 remains in the accommodation space 67 of the box 66.

[0148] like Fig. 22 As shown, the driving device 77 is used to move the transport container 65 from the first position (refer to Fig.18 as well as Fig.19 ) moves to the second position (refer to Fig. 22). Specifically, the rope 79 is wound up using the traction machine 78. The transport container 65 connected to the rope 79 is moved from the first position to the second position.

[0149] like Fig. 22 As shown, when the transport container 65 is located at the second position, the adsorbent 40 is supplied from the transport container 65 to the storage portion 10. Specifically, when the transport container 65 is located at the second position, the transport container 65 faces the opening 16, and the top surface 66t of the compartment 66 contacts the top plate 76 of the passage 75 of the transport container 65. The upper end 74b of the operating rod 74 contacts the top plate 76, and the operating rod 74 moves downward against the force of the spring 73. The upper end 74b of the operating rod 74 is coplanar with the top surface 66t of the compartment 66. The baffle 70 connected to the operating rod 74 also moves downward. The baffle 70 (specifically, the baffle body 71) opens all the openings 68 of the compartment 66. The adsorbent 40 moves along the inclined bottom surface 69. For example, the adsorbent 40 rolls on the inclined bottom surface 69 by the weight of the adsorbent 40. The adsorbent 40 moves from the storage space 67 of the compartment 66 through the opening 16 to the storage space 12 of the storage portion 10. The valve 14 opens the opening 13 . The adsorbent 40 is supplied to the adsorption space 25 of the adsorption unit 20 through the opening 13 .

[0150] The adsorbent 40 rolls again on the inclined plates 61 and 62 by its own weight. The adsorbent 40 rolls again on the inclined plates 61 and 62 in the adsorption space 25 and contacts the gas 43 to adsorb carbon dioxide contained in the gas 43. Fig.18 , Fig.19 as well as Fig. 22 The steps shown are performed until the adsorbent 40 has sufficiently adsorbed carbon dioxide. The adsorbent 40 is reused to remove carbon dioxide contained in the gas 43.

[0151] When the adsorbent 40 fully adsorbs carbon dioxide and the carbon dioxide adsorption capacity of the adsorbent 40 decreases, as shown in FIG. Fig. 22 as well as Fig.25 As shown, the valve 64 is moved from the first valve position (refer to Fig.18 as well as Fig.19 ) is switched to the second valve position. When the valve 64 is in the second valve position, the valve 64 guides the adsorbent 40 to the opening 33 and the recovery unit 30. The adsorbent 40 adsorbed with carbon dioxide falls from the inclined plate (inclined plate 62) closest to the recovery unit 30 among the inclined plates 61 and 62 toward the recovery unit 30 by its own weight. Fig.25 As shown, the adsorbent 40 having adsorbed carbon dioxide is received in the recovery space 32 of the recovery unit 30 through the opening 33. The adsorbent 40 having adsorbed carbon dioxide is recovered by the recovery unit 30.

[0152] The carbon dioxide recovery device 1c and the carbon dioxide recovery method of the present embodiment have the following effects in addition to the effects of the carbon dioxide recovery device 1b and the carbon dioxide recovery method of the second embodiment.

[0153] The carbon dioxide recovery device 1c of this embodiment further includes a transport container 65 and a driving device 77. The driving device 77 moves the transport container 65 from a first position facing the adsorption unit 20 to a second position facing the storage unit 10. When the transport container 65 is located at the first position, the adsorbent 40 dropped in the adsorption space 25 is accommodated in the transport container 65. When the transport container 65 is located at the second position, the adsorbent 40 is supplied from the transport container 65 to the storage unit 10.

[0154] Therefore, in order to remove the carbon dioxide contained in the gas 43, the adsorbent 40 can be repeatedly used. Carbon dioxide can be recovered more efficiently. In addition, since the adsorbent 40 is reused, the size of the adsorption unit 20 (especially, the size of the adsorption unit 20 in the falling direction (-z direction) of the adsorbent 40) can be reduced. The carbon dioxide recovery device 1c can be miniaturized.

[0155] In the carbon dioxide recovery device 1c of the present embodiment, the adsorption section 20 includes a second valve (valve 64). A second opening (opening 63) connected to the adsorption space 25 is provided in the adsorption section 20. When the transport container 65 is located at the first position, the transport container 65 faces the second opening. The second valve can be switched between the first valve position and the second valve position. When the second valve is located at the first valve position, the second valve guides the adsorbent 40 to the second opening. When the second valve is located at the second valve position, the second valve guides the adsorbent 40 to the recovery section 30.

[0156] Therefore, after the adsorbent 40 adsorbs as much carbon dioxide as possible, the adsorbent 40 sufficiently adsorbing carbon dioxide can be supplied to the recovery unit 30. Carbon dioxide can be recovered more efficiently.

[0157] The carbon dioxide recovery method of this embodiment further includes the following steps: allowing the adsorbent 40 adsorbing carbon dioxide to fall in the adsorption space 25 due to its own weight, so that the adsorbent 40 adsorbing carbon dioxide contacts the gas 43, thereby allowing the adsorbent 40 adsorbing carbon dioxide to adsorb the carbon dioxide contained in the gas 43.

[0158] Therefore, in order to remove the carbon dioxide contained in the gas 43, the adsorbent 40 can be repeatedly used. Carbon dioxide can be recovered more efficiently. In addition, since the adsorbent 40 is reused, the size of the adsorption unit 20 (especially, the size of the adsorption unit 20 in the falling direction (-z direction) of the adsorbent 40) can be reduced. The carbon dioxide recovery device 1c can be miniaturized.

[0159] Implementation method 4.

[0160] Reference Figure 26 to Figure 33 Next, a carbon dioxide recovery device 1d according to Embodiment 4 will be described. The carbon dioxide recovery device 1d according to this embodiment has the same structure as the carbon dioxide recovery device 1c according to Embodiment 3, but is different from the carbon dioxide recovery device 1c according to Embodiment 3 mainly in the following points.

[0161] The recovery part 30 is also provided with openings 34, 35, and 36. The opening 34 is connected to the recovery space 32 and the passage 75 of the transport container 65. The openings 35 and 36 are connected to the recovery space 32, respectively. The recovery part 30 also includes valves 80, 81, 82, and 83. The valve 80 opens and closes the opening 33. The valve 81 opens and closes the opening 34. The valve 82 opens and closes the opening 35. The valve 83 opens and closes the opening 36. The recovery part 30 includes an inclined bottom surface 31b. The inclined bottom surface 31b gradually descends toward the opening 34.

[0162] The drive device 77 can also move the transport container 65 to a third position (see Figure 29 to Figure 32 The driving device 77 makes the transport container 65 in the first position (refer to Fig.26 as well as Fig. 27 ), the second position (refer to Fig.28 as well as Fig.33 ) and the third position (refer to Figure 29 to Figure 32 ). When the transport container 65 is at the third position, the transport container 65 faces the recovery unit 30 (specifically, the opening 34). When the transport container 65 is at the third position and the valve 81 opens the opening 34, the adsorbent 40 is supplied from the recovery unit 30 to the transport container 65.

[0163] The carbon dioxide recovery device 1d further includes a carbon dioxide separation device 84. The carbon dioxide separation device 84 applies heat or pressure to the adsorbent 40 accommodated in the recovery space 32 to separate carbon dioxide from the adsorbent 40. In the present embodiment, the carbon dioxide separation device 84 is a device that applies heat to the adsorbent 40 to separate carbon dioxide from the adsorbent 40, and includes, for example, a heating device 84a and an exhaust device 84b.

[0164] The heating device 84a heats the adsorbent 40 contained in the recovery space 32. Specifically, the heating device 84a includes a pipe 85 and an air supply blower 86. The pipe 85 is connected to the recovery part 30 and communicates with the opening 35. Fig.30 As shown, the air supply blower 86 supplies hot air 90 from the pipe 85 to the recovery space 32 of the recovery unit 30 through the opening 35. The adsorbent 40 accommodated in the recovery space 32 and adsorbing carbon dioxide is heated by the hot air 90. The carbon dioxide adsorbed by the adsorbent 40 is separated from the adsorbent 40.

[0165] The exhaust device 84b exhausts the carbon dioxide separated from the heated adsorbent 40 from the recovery space 32. Specifically, the exhaust device 84b includes a pipe 87 and an exhaust blower 88. The pipe 87 is connected to the recovery part 30 and communicates with the opening 36. Fig.31 As shown, the exhaust blower 88 discharges the carbon dioxide separated from the adsorbent 40 from the recovery space 32 of the recovery unit 30 to the pipe 87 through the opening 36. A gas cylinder 89 is connected to the pipe 87. The carbon dioxide separated from the adsorbent 40 is stored in the gas cylinder 89.

[0166] Reference Figure 26 to Figure 33 , the operation of the carbon dioxide recovery device 1d and the carbon dioxide recovery method according to the present embodiment will be described.

[0167] like Fig.26 As shown, the valve 14 closes the opening 13. Fig.18 In the same manner as in the illustrated process, the adsorbent 40 is stored in the storage unit 10 .

[0168] like Fig. 27 As shown, the valve 14 opens the opening 13. Fig.19 Similarly to the process shown, the adsorbent 40 falls toward the adsorption space 25 of the adsorption unit 20 by its own weight. In the adsorption unit 20, the adsorbent 40 falls toward the recovery unit 30 while rolling on the inclined plates 61 and 62 by its own weight. The adsorbent 40 contacts the gas 43 while rolling on the inclined plates 61 and 62 in the adsorption space 25, and adsorbs carbon dioxide contained in the gas 43.

[0169] like Fig. 27 As shown, the same as in Embodiment 3 Fig.19 In the same process shown, the transport container 65 is located at the first position and the valve 64 is located at the first valve position. The adsorbent 40 having adsorbed carbon dioxide rolls on the valve 64 and is accommodated in the accommodation space 67 of the housing 66 through the opening 63 .

[0170] like Fig.28 As shown, the same as in Embodiment 3 Fig. 22 Similarly to the process shown in FIG. 1 , the driving device 77 is used to move the transport container 65 from the first position (see FIG. Fig.26 as well as Fig. 27 ) moves to the second position (refer to Fig.28 When the transport container 65 is located at the second position, the baffle 70 opens all the openings 68 of the compartment 66. The adsorbent 40 moves along the inclined bottom surface 69. The adsorbent 40 moves from the receiving space 67 of the compartment 66 to the storage space 12 of the storage portion 10 through the opening 16.

[0171] The valve 14 opens the opening 13. The adsorbent 40 is supplied to the adsorption space 25 of the adsorption unit 20 through the opening 13. The adsorbent 40 rolls again on the inclined plates 61 and 62 by its own weight. The adsorbent 40 rolls on the inclined plates 61 and 62 in the adsorption space 25 while contacting the gas 43 again, and adsorbs the carbon dioxide contained in the gas 43. This process is repeated. Figure 26 to Figure 28 The steps shown are performed until the adsorbent 40 has sufficiently adsorbed carbon dioxide. The adsorbent 40 is reused to remove carbon dioxide contained in the gas 43.

[0172] When the adsorbent 40 sufficiently adsorbs carbon dioxide and the carbon dioxide adsorption capacity of the adsorbent 40 decreases, the adsorbent 40 is not as good as that of the third embodiment. Fig. 22 as well as Fig.25 Similarly, the valve 64 is moved from the first valve position (refer to Fig.26 as well as Fig. 27 ) Switch to the second valve position (refer to Fig.28 as well as Fig.29 ).like Fig.28 as well as Fig.29 As shown in FIG. 1 , when the valve 64 is in the second valve position, the valve 64 guides the adsorbent 40 to the opening 33 and the recovery unit 30. The valve 80 opens the opening 33. The adsorbent 40 adsorbed with carbon dioxide falls from the inclined plate (inclined plate 62) closest to the recovery unit 30 among the inclined plates 61 and 62 toward the recovery unit 30 by its own weight. Fig.29 As shown, the adsorbent 40 having adsorbed carbon dioxide is received in the recovery space 32 of the recovery unit 30 through the opening 33. The adsorbent 40 having adsorbed carbon dioxide is recovered by the recovery unit 30.

[0173] like Fig.29 As shown, the driving device 77 is used to move the transport container 65 from the second position (refer to Fig. 27 as well as Fig.28 ) moves to the third position (refer to Figure 29 to Figure 32 ). When the transport container 65 is located at the third position, the transport container 65 faces the recovery portion 30 (specifically, the opening 34). Fig.32 As shown, the transport container 65 may be moved from the second position to the third position before the valve 81 opens the opening 34 .

[0174] The carbon dioxide is separated from the adsorbent 40 contained in the recovery space 32 using the carbon dioxide separation device 84. For example, Fig.30 As shown, the heating device 84a is used to heat the adsorbent 40 contained in the recovery space 32 and adsorbing carbon dioxide. Specifically, the valve 80 closes the opening 33. In order to avoid interference between the valve 64 and the valve 80, the valve 64 can also be changed from the second valve position (refer to Fig.28 as well as Fig.29 ) Switch to the first valve position (refer to Fig.26 , Fig. 27 as well as Fig.30 ). Valve 81 closes opening 34. Valve 83 closes opening 36. Valve 82 opens opening 35. Air supply blower 86 supplies hot air 90 from pipe 85 to recovery space 32 of recovery unit 30 through opening 35. Adsorbent 40 accommodated in recovery space 32 and adsorbing carbon dioxide is heated by hot air 90. Carbon dioxide adsorbed by adsorbent 40 is separated from adsorbent 40.

[0175] like Fig.31 As shown, the carbon dioxide separated from the heated adsorbent 40 is discharged from the recovery space 32 using an exhaust device 84b. Specifically, valve 80 maintains a state of closing the opening 33. Valve 81 maintains a state of closing the opening 34. Valve 82 closes the opening 35. Valve 83 opens the opening 36. The exhaust blower 88 discharges the carbon dioxide separated from the adsorbent 40 from the recovery space 32 of the recovery section 30 to the pipe 87 through the opening 36. A gas cylinder 89 is connected to the pipe 87. The carbon dioxide separated from the adsorbent 40 is recovered in the gas cylinder 89. The adsorbent 40 from which the carbon dioxide is separated remains in the recovery space 32 of the recovery section 30.

[0176] like Fig.32 As shown, the valve 83 closes the opening 36. The valve 81 opens the opening 34. The adsorbent 40 from which the carbon dioxide has been separated moves along the inclined bottom surface 31b. For example, the adsorbent 40 rolls on the inclined bottom surface 31b by its own weight. The adsorbent 40 is received in the receiving space 67 of the compartment 66 from the recovery space 32 of the recovery unit 30 through the opening 34. When the transport container 65 is located at the third position, similarly to when the transport container 65 is located at the first position, as shown in FIG. Fig. 20 , Fig.21 as well as Fig.32 As shown in FIG. 1 , the top surface 66t of the box 66 and the upper end 74b of the operating rod 74 are separated from the top plate 76 of the passage 75 of the transport container 65. Therefore, when the transport container 65 is located at the third position, the baffle 70 closes a part of the opening 68 of the box 66. Therefore, the adsorbent 40 accommodated in the accommodation space 67 of the box 66 remains in the accommodation space 67 of the box 66.

[0177] The conveying container 65 is moved from the third position (see Fig.32 ) moves to the second position (refer to Fig.33 ). Specifically, the rope 79 is wound up using the traction machine 78. The transport container 65 connected to the rope 79 is moved from the third position to the second position.

[0178] When the transport container 65 is located at the second position, Fig.23 , Fig.24as well as Fig.33 As shown, the baffle 70 opens all the openings 68 of the compartment 66. The adsorbent 40 moves along the inclined bottom surface 69. For example, the adsorbent 40 rolls on the inclined bottom surface 69 by the weight of the adsorbent 40. The adsorbent 40 moves from the receiving space 67 of the compartment 66 through the opening 16 to the storage space 12 of the storage portion 10. Fig.33 As shown, the valve 14 opens the opening 13. The adsorbent 40 is supplied to the adsorption space 25 of the adsorption unit 20 through the opening 13. The adsorbent 40 rolls again on the inclined plates 61 and 62 by its own weight. The adsorbent 40 contacts the gas 43 again while rolling on the inclined plates 61 and 62 in the adsorption space 25, and adsorbs the carbon dioxide contained in the gas 43. In this way, the adsorbent 40 is reused to remove the carbon dioxide contained in the gas 43.

[0179] (Variation Example)

[0180] like Figures 34 to 40 As shown, in the carbon dioxide recovery device 1e of the modified example of this embodiment, Figures 1 to 6 The carbon dioxide recovery device 1 of the first embodiment shown may also not include the inclined plates 61 and 62, and may not provide the opening 63 in the adsorption unit 20. In the carbon dioxide recovery device 1e of the modified example of this embodiment, the storage unit 10 may also include the valve 14 of the carbon dioxide recovery device 1 of the first embodiment.

[0181] Reference Figures 34 to 40 The operation and carbon dioxide recovery method of the carbon dioxide recovery device 1e of the modified example of this embodiment are described. The operation and carbon dioxide recovery method of the carbon dioxide recovery device 1e of the modified example of this embodiment are the same as the operation and carbon dioxide recovery method of the carbon dioxide recovery device 1d of this embodiment.

[0182] like Fig.34 As shown, the valve 14 closes the opening 13. Figure 1 as well as Figure 2 In the same manner as in the illustrated process, the adsorbent 40 is stored in the storage unit 10 .

[0183] like Fig.35 As shown, the valve 14 opens the opening 13. Figure 3 as well as Figure 4Similarly to the process shown, the adsorbent 40 falls toward the adsorption space 25 of the adsorption section 20 by its own weight. In the adsorption section 20, the adsorbent 40 falls in the adsorption space 25 from the storage section 10 toward the recovery section 30 by its own weight. The gas 43 is introduced into the adsorption space 25 through the opening 26 in a direction (e.g., +x direction) intersecting the falling direction (e.g., -z direction) of the adsorbent 40. The adsorbent 40 contacts the gas 43 in the adsorption space 25 and adsorbs the carbon dioxide contained in the gas 43. The gas 43 from which carbon dioxide has been removed by the adsorbent 40 is discharged through the opening 27 (see Figure 2 , Figure 4 as well as Figure 6 ) flows out from the adsorption space 25.

[0184] The adsorbent 40 that has adsorbed the carbon dioxide contained in the gas 43 falls from the adsorption unit 20 toward the recovery unit 30 by its own weight. Fig.36 As shown, the adsorbent 40 having adsorbed carbon dioxide is received in the recovery space 32 of the recovery unit 30 through the opening 33. The adsorbent 40 having adsorbed carbon dioxide is recovered by the recovery unit 30.

[0185] The carbon dioxide is separated from the adsorbent 40 contained in the recovery space 32 using the carbon dioxide separation device 84. For example, Fig.37 As shown, the present embodiment Fig.30 Similarly to the process shown in FIG. 1 , the carbon dioxide is separated from the adsorbent 40 adsorbing the carbon dioxide by heating the adsorbent 40 adsorbing the carbon dioxide. Fig.38 As shown, the present embodiment Fig.31 In the same manner as in the process shown, the carbon dioxide separated from the heated adsorbent 40 is exhausted from the recovery space 32 using the exhaust device 84b. The carbon dioxide separated from the adsorbent 40 is recovered in the gas cylinder 89.

[0186] like Fig.39 As shown, the present embodiment Fig.32 In the same process shown, the valve 81 opens the opening 34 to move the adsorbent 40 from which carbon dioxide has been separated from the recovery space 32 of the recovery unit 30 to the storage space 67 of the housing 66 . The adsorbent 40 from which carbon dioxide has been separated is stored in the storage space 67 of the housing 66 .

[0187] like Fig.40 As shown, the present embodiment Fig.33 In the same manner as shown in the step, the driving device 77 is used to move the transport container 65 from the third position (refer to Fig.39 ) moves to the second position (refer to Fig.40). When the transport container 65 is located at the second position, the baffle 70 opens all the openings 68 of the compartment 66. The adsorbent 40 moves from the storage space 67 of the compartment 66 to the storage space 12 of the storage section 10 through the opening 16. The valve 14 opens the opening 13. The adsorbent 40 is supplied to the adsorption space 25 of the adsorption section 20 through the opening 13. The adsorbent 40 falls in the adsorption space 25 from the storage section 10 toward the recovery section 30 by its own weight. The adsorbent 40 contacts the gas 43 again in the adsorption space 25 and adsorbs the carbon dioxide contained in the gas 43. In this way, the adsorbent 40 is reused to remove the carbon dioxide contained in the gas 43.

[0188] In other modified examples of the present embodiment, while carbon dioxide is separated from a part of the adsorbent 40 using the carbon dioxide separation device 84, the remaining adsorbent 40 is brought into contact with the gas 43 in the adsorption section 20, so that the remaining adsorbent 40 adsorbs carbon dioxide contained in the gas 43. Since the carbon dioxide separation step and the carbon dioxide adsorption step are performed in parallel, carbon dioxide can be recovered more efficiently.

[0189] The carbon dioxide recovery apparatuses 1d and 1e and the carbon dioxide recovery method of the present embodiment have the following effects in addition to the effects of the carbon dioxide recovery apparatus 1c and the carbon dioxide recovery method of the third embodiment.

[0190] The carbon dioxide recovery device 1d, 1e of the present embodiment further includes a carbon dioxide separation device 84, a transport container 65, and a driving device 77. The driving device 77 moves the transport container 65 from the third position facing the recovery unit 30 to the second position facing the storage unit 10. Inside the recovery unit 30, a recovery space 32 is formed for accommodating the adsorbent 40 dropped in the adsorption space 25. The carbon dioxide separation device 84 separates carbon dioxide from the adsorbent 40 accommodated in the recovery space 32. When the transport container 65 is located at the third position, the adsorbent 40 from which carbon dioxide is separated is accommodated in the transport container 65 from the recovery unit 30. When the transport container 65 is located at the second position, the adsorbent 40 is supplied from the transport container 65 to the storage unit 10.

[0191] Therefore, the adsorbent 40 from which the carbon dioxide has been separated can be reused to remove the carbon dioxide contained in the gas 43. Carbon dioxide can be recovered more efficiently. In addition, since the adsorbent 40 is reused, the size of the adsorption unit 20 (particularly, the size of the adsorption unit 20 in the falling direction (-z direction) of the adsorbent 40) can be reduced. The carbon dioxide recovery devices 1d and 1e can be miniaturized.

[0192] In the carbon dioxide recovery devices 1 d and 1 e of the present embodiment, the carbon dioxide separation device 84 includes a heating device 84 a for heating the adsorbent 40 accommodated in the recovery space 32 and an exhaust device 84 b for exhausting the carbon dioxide separated from the heated adsorbent 40 from the recovery space 32 .

[0193] Therefore, carbon dioxide can be efficiently separated from the adsorbent 40. The adsorbent 40 from which carbon dioxide has been separated can be reused. Carbon dioxide can be recovered more efficiently.

[0194] In the carbon dioxide recovery devices 1d and 1e of this embodiment, the recovery unit 30 is provided with a second opening (opening 34) communicating with the recovery space 32. When the transport container 65 is located at the third position, the transport container 65 faces the second opening. The recovery unit 30 includes a second valve (valve 81) that opens and closes the second opening.

[0195] Therefore, after separating as much carbon dioxide as possible from the adsorbent 40, the adsorbent 40 from which carbon dioxide has been sufficiently separated can be supplied to the storage unit 10 using the transport container 65. Carbon dioxide can be recovered more efficiently.

[0196] The carbon dioxide recovery method of the present embodiment also includes the following steps: separating carbon dioxide from the adsorbent 40 adsorbing carbon dioxide; and allowing the adsorbent 40 adsorbing carbon dioxide to fall in the adsorption space 25 due to its own weight, so that the adsorbent 40 from which the carbon dioxide is separated contacts with the gas 43 again, thereby allowing the adsorbent 40 from which the carbon dioxide is separated to adsorb the carbon dioxide contained in the gas 43.

[0197] Therefore, the adsorbent 40 from which the carbon dioxide has been separated can be reused to remove the carbon dioxide contained in the gas 43. Carbon dioxide can be recovered more efficiently. In addition, since the adsorbent 40 is reused, the size of the adsorption unit 20 (particularly, the size of the adsorption unit 20 in the falling direction (-z direction) of the adsorbent 40) can be reduced. According to the carbon dioxide recovery method of this embodiment, the carbon dioxide recovery devices 1d and 1e can be miniaturized.

[0198] In the carbon dioxide recovery method of the present embodiment, carbon dioxide is separated from the adsorbent 40 that has adsorbed carbon dioxide by heating the adsorbent 40 that has adsorbed carbon dioxide.

[0199] Therefore, carbon dioxide can be efficiently separated from the adsorbent 40. The adsorbent 40 from which carbon dioxide has been separated can be reused. Carbon dioxide can be recovered more efficiently.

[0200] The carbon dioxide recovery method of the present embodiment further includes a step of recovering the carbon dioxide separated from the adsorbent 40. Therefore, carbon dioxide can be recovered more efficiently.

[0201] Implementation method 5.

[0202] Reference Figure 41 to Figure 43 Next, a carbon dioxide recovery device 1f according to Embodiment 5 will be described. The carbon dioxide recovery device 1f according to this embodiment has the same structure as the carbon dioxide recovery device 1 according to Embodiment 1, but is different from the carbon dioxide recovery device 1 according to Embodiment 1 mainly in the following points.

[0203] The carbon dioxide recovery device 1f is installed in the building 50 (refer to Figure 12 to Figure 14 ) is connected to a pipe 93 in the air conditioner. The pipe 93 is, for example, a ventilation pipe or an air conditioning pipe. The carbon dioxide recovery device 1f and the pipe 93 are included in the air conditioning ventilation system 2f of this embodiment.

[0204] Specifically, the pipeline 93 includes an upstream pipeline portion 93a and a downstream pipeline portion 93b. The gas 43 containing carbon dioxide flows from the upstream pipeline portion 93a to the downstream pipeline portion 93b. The carbon dioxide recovery device 1f is arranged between the upstream pipeline portion 93a and the downstream pipeline portion 93b. The upstream pipeline portion 93a is arranged on the upstream side of the gas 43 relative to the carbon dioxide recovery device 1f. The upstream pipeline portion 93a is connected to the carbon dioxide recovery device 1f and communicates with the opening 26. The downstream pipeline portion 93b is arranged on the downstream side of the gas 43 relative to the carbon dioxide recovery device 1f. The downstream pipeline portion 93b is connected to the carbon dioxide recovery device 1f and communicates with the opening 27.

[0205] Reference Figure 41 to Figure 43 The operation and carbon dioxide recovery method of the carbon dioxide recovery device 1f of this embodiment are described below. The operation and carbon dioxide recovery method of the carbon dioxide recovery device 1f of this embodiment are the same as those of the carbon dioxide recovery device 1 of the first embodiment.

[0206] like Fig.41 As shown, the valve 14 closes the opening 13. Figure 1 as well as Figure 2 In the same manner as in the illustrated process, the adsorbent 40 is stored in the storage unit 10 .

[0207] like Fig.42 As shown, the valve 14 opens the opening 13. Figure 3 as well as Figure 4Similarly to the process shown, the adsorbent 40 falls toward the adsorption space 25 of the adsorption section 20 by its own weight. In the adsorption section 20, the adsorbent 40 falls in the adsorption space 25 from the storage section 10 toward the recovery section 30 by its own weight. The gas 43 containing carbon dioxide flows from the upstream side pipe section 93a to the downstream side pipe section 93b. The gas 43 is introduced into the adsorption space 25 through the opening 26 in a direction (for example, +x direction) intersecting the falling direction of the adsorbent 40 (for example, -z direction). The opening 26 is an inlet for the gas 43. The adsorbent 40 contacts the gas 43 in the adsorption space 25 and adsorbs the carbon dioxide contained in the gas 43. The gas 43 from which carbon dioxide has been removed by the adsorbent 40 flows out of the adsorption space 25 through the opening 27. The opening 27 is an outlet for the gas 43.

[0208] The adsorbent 40 that has adsorbed the carbon dioxide contained in the gas 43 falls from the adsorption unit 20 toward the recovery unit 30 by its own weight. Fig.43 As shown, the embodiment 1 Figure 5 as well as Figure 6 In the same manner as in the process shown, the adsorbent 40 that has adsorbed carbon dioxide is received in the recovery space 32 of the recovery unit 30 through the opening 33. The adsorbent 40 that has adsorbed carbon dioxide is recovered by the recovery unit 30.

[0209] (Variation Example)

[0210] like Fig.44 As shown, in the carbon dioxide recovery device 1f of the first modified example of the present embodiment, the carbon dioxide recovery device 1f is different from the carbon dioxide recovery device 1f of the fifth modified example of the present embodiment (see Fig.11 ) Similarly, the adsorption unit 20 includes a mesh 46 that allows the gas 43 to pass therethrough but does not allow the adsorbent 40 to pass therethrough. The mesh 46 covers the opening 27.

[0211] like Fig.45 as well as Fig.46 As shown, in the carbon dioxide recovery device 1f of the second modified example of the present embodiment, when the valve 14 opens the opening 13, the valve 14 closes a part of the opening 26 which is the inlet of the gas 43. The valve 14 blocks the flow of a part of the gas 43 containing carbon dioxide. A negative pressure area 94 is generated on the downstream side of the valve 14. A part of the adsorption space 25 becomes the negative pressure area 94. The negative pressure area 94 is an area where the pressure of the gas 43 is lower than that of the area surrounding the negative pressure area 94. In addition, in the negative pressure area 94, the flow rate of the gas 43 is smaller than that of the area surrounding the negative pressure area 94. Therefore, it is possible to prevent the adsorbent 40 from being washed away by the gas 43 and going out of the adsorption part 20 through the opening 27.

[0212] The carbon dioxide recovery device 1f and the air-conditioning ventilation system 2f of the present embodiment provide the following effects in addition to the effects of the carbon dioxide recovery device 1 and the air-conditioning ventilation system 2 of the first embodiment.

[0213] In the carbon dioxide recovery device 1f of this embodiment, the adsorption unit 20 includes a mesh 46 that allows the gas 43 to pass but does not allow the adsorbent 40 to pass. The adsorption unit 20 is provided with an outflow port (opening 27) for the gas 43 to flow out of the adsorption space 25. The mesh 46 covers the outflow port.

[0214] The net 46 allows the gas 43 from which carbon dioxide has been removed by the adsorbent 40 to pass therethrough, and prevents the adsorbent 40 from being washed away by the gas 43 and leaving the adsorption unit 20 through the outflow port (opening 27 ).

[0215] In the carbon dioxide recovery device 1f of the present embodiment, when the first valve (valve 14) opens the first opening (opening 13), the first valve closes a part of the inlet (opening 26).

[0216] Therefore, the first valve (valve 14) blocks a portion of the flow of the gas 43 containing carbon dioxide. A negative pressure region 94 is generated on the downstream side of the first valve. The adsorbent 40 can be prevented from being washed away by the gas 43 and coming out of the adsorption unit 20.

[0217] The air conditioning ventilation system 2f of the present embodiment includes a carbon dioxide recovery device 1f and a duct 93 connected to the carbon dioxide recovery device 1f. The duct 93 communicates with the inlet (opening 26).

[0218] Since the duct 93 is connected to the inlet (opening 26), the gas 43 can be introduced into the adsorption space 25 by utilizing the flow of the gas 43 flowing in the duct 93. The carbon dioxide contained in the gas 43 can be recovered more efficiently.

[0219] Embodiments 1-5 disclosed herein and their variations should be understood as being illustrative in all aspects and not restrictive. At least two of the embodiments 1-5 disclosed herein and their variations may be combined as long as there is no contradiction. The scope of the present disclosure is not indicated by the above description but by the claims, and is intended to include all changes within the meaning and scope equivalent to the claims.

[0220] Description of Reference Numerals

[0221] 1, 1b, 1c, 1d, 1e, 1f carbon dioxide recovery device, 2, 2f air conditioning ventilation system, 10 storage part, 11 storage body, 11b inclined bottom plate, 12 storage space, 13, 16 opening, 14 valve, 20 adsorption part, 21 front wall, 22 rear wall, 23, 24 side wall, 25 adsorption space, 26, 27, 28, 63 opening, 29 eaves, 30 recovery part, 31 recovery body, 31b, 69 inclined bottom surface, 32 recovery space, 33, 34, 35, 36 opening, 40 adsorbent, 43 gas, 46 net, 50 building, 51 side wall, 52 roof, 55 air conditioning outdoor unit, 56 air intake, 57 air exhaust, 61, 62 Inclined plate, 61a, 61b, 62a, 62b end, 64 valve, 65 transport container, 66 compartment, 66t top surface, 67 storage space, 68 opening, 70 baffle, 71 baffle body, 72 protrusion, 73 spring, 74 operating rod, 74a lower end, 74b upper end, 75 passage, 76 top plate, 77 driving device, 78 traction machine, 79 rope, 80, 81, 82, 83 valve, 84 carbon dioxide separation device, 84a heating device, 84b exhaust device, 85, 87 pipe, 86 air supply blower, 88 exhaust blower, 89 gas cylinder, 90 hot air, 93 pipeline, 93a upstream side pipeline part, 93b downstream side pipeline part, 94 negative pressure area.

Claims

1. A carbon dioxide recovery device, wherein: The carbon dioxide recovery device comprises: a storage portion for receiving an adsorbent; a recovery unit for recovering the adsorbent; and Adsorption Department, An adsorption space is formed inside the adsorption portion. The adsorption unit is provided with an inlet for allowing a gas containing carbon dioxide to flow into the adsorption space. The adsorption unit is arranged between the storage unit and the recovery unit. The adsorbent falls from the storage part toward the recovery part in the adsorption space by the adsorbent's own weight. The gas is introduced into the adsorption space through the inlet in a direction intersecting with the falling direction of the adsorbent. The adsorbent adsorbs the carbon dioxide contained in the gas in the adsorption space.

2. The carbon dioxide recovery device according to claim 1, wherein: The storage part is arranged above the adsorption part, The recovery unit is arranged below the adsorption unit.

3. The carbon dioxide recovery device according to claim 1 or 2, wherein: The storage portion includes a storage body and a first valve, A storage space for storing the adsorbent is formed inside the storage body. The storage body is provided with a first opening, The first opening is in communication with the storage space and the adsorption space, The first valve opens and closes the first opening.

4. The carbon dioxide recovery device according to claim 3, wherein: When the first valve opens the first opening, the first valve closes a portion of the inlet.

5. The carbon dioxide recovery device according to any one of claims 1 to 4, wherein: The adsorption portion includes a first wall and a second wall connected to the first wall. The first wall and the second wall define a portion of the adsorption space, The first wall has a width greater than that of the second wall, The inlet is disposed on the first wall.

6. The carbon dioxide recovery device according to claim 5, wherein: The width of the inlet is not less than 60% and not more than 100% of the width of the first wall.

7. The carbon dioxide recovery device according to any one of claims 1 to 6, wherein: The adsorption portion includes an eaves portion provided above the inlet.

8. The carbon dioxide recovery device according to any one of claims 1 to 7, wherein: The adsorption part includes a net that allows the gas to pass but does not allow the adsorbent to pass. The adsorption portion is provided with an outflow port for the gas to flow out from the adsorption space. The net covers the outflow opening.

9. The carbon dioxide recovery device according to any one of claims 1 to 8, wherein: The carbon dioxide recovery device further comprises at least one inclined plate disposed in the adsorption space and inclined relative to a horizontal plane. The adsorbent rolls on the at least one inclined plate by its own weight.

10. The carbon dioxide recovery device according to claim 9, wherein: The at least one inclined plate includes a first end fixed to the adsorption portion and a second end on a side opposite to the first end. A first distance between the first end and the storage portion is smaller than a second distance between the second end and the storage portion.

11. The carbon dioxide recovery device according to claim 9 or 10, wherein: The at least one inclined plate is a plurality of inclined plates.

12. The carbon dioxide recovery device according to any one of claims 1 to 11, wherein: The carbon dioxide recovery device also has: handling containers; and a driving device that moves the transport container from a first position facing the adsorption portion to a second position facing the storage portion, When the transport container is located at the first position, the adsorbent dropped into the adsorption space is accommodated in the transport container. When the transport container is located at the second position, the adsorbent is supplied from the transport container to the storage unit.

13. The carbon dioxide recovery device according to claim 12, wherein: The adsorption part includes a second valve, The adsorption portion is provided with a second opening communicating with the adsorption space, When the transport container is located at the first position, the transport container faces the second opening. the second valve being switchable between a first valve position and a second valve position, When the second valve is in the first valve position, the second valve directs the adsorbent to the second opening, The second valve directs the adsorbent to the recovery section when the second valve is in the second valve position.

14. The carbon dioxide recovery device according to any one of claims 1 to 11, wherein: The carbon dioxide recovery device also has: Carbon dioxide separation device; handling containers; and a driving device that moves the transport container from a third position facing the recovery portion to a second position facing the storage portion, A recovery space for accommodating the adsorbent dropped in the adsorption space is formed inside the recovery unit. The carbon dioxide separation device separates the carbon dioxide from the adsorbent contained in the recovery space. When the transport container is located at the third position, the adsorbent from which the carbon dioxide has been separated is stored in the transport container from the recovery unit. When the transport container is located at the second position, the adsorbent is supplied from the transport container to the storage unit.

15. The carbon dioxide recovery device according to claim 14, wherein: The carbon dioxide separation device includes: a heating device for heating the adsorbent accommodated in the recovery space; and an exhaust device for exhausting the carbon dioxide separated from the heated adsorbent from the recovery space.

16. The carbon dioxide recovery device according to claim 14 or 15, wherein: The recovery portion is provided with a second opening communicating with the recovery space, When the transport container is located at the third position, the transport container faces the second opening. The recovery unit includes a second valve that opens and closes the second opening.

17. The carbon dioxide recovery device according to any one of claims 1 to 16, wherein: The adsorbent has a spherical or cylindrical shape.

18. The carbon dioxide recovery device according to any one of claims 1 to 17, wherein: The carbon dioxide recovery device is arranged on the roof or side wall of the building.

19. An air conditioning ventilation system, wherein: The air conditioning and ventilation system comprises: The carbon dioxide recovery device according to any one of claims 1 to 17; and Air conditioner outdoor unit, The air conditioner outdoor unit is provided with an air intake port. The carbon dioxide recovery device is arranged in front of the air intake port.

20. An air conditioning ventilation system, wherein: The air conditioning and ventilation system comprises: The carbon dioxide recovery device according to any one of claims 1 to 17; and a pipeline connected to the carbon dioxide recovery device, The pipe is in communication with the inlet.

21. A method for recovering carbon dioxide, wherein: The carbon dioxide recovery method comprises the following steps: The adsorbent is caused to fall by its own weight in the adsorption space of the adsorption section, and the adsorbent is brought into contact with a gas containing carbon dioxide, so that the adsorbent adsorbs the carbon dioxide contained in the gas, and the gas is introduced into the adsorption space in a direction intersecting with the falling direction of the adsorbent, and The carbon dioxide recovery method further includes a step of recovering the adsorbent on which the carbon dioxide is adsorbed.

22. The method for recovering carbon dioxide according to claim 21, wherein: The step of causing the adsorbent to fall by its own weight includes causing the adsorbent to roll on at least one inclined plate disposed in the adsorption space and inclined with respect to a horizontal plane.

23. The carbon dioxide recovery method according to claim 21 or 22, wherein: The carbon dioxide recovery method further comprises the following steps: causing the adsorbent adsorbing the carbon dioxide to fall in the adsorption space by its own weight, causing the adsorbent adsorbing the carbon dioxide to contact the gas, thereby causing the adsorbent adsorbing the carbon dioxide to adsorb the carbon dioxide contained in the gas.

24. The carbon dioxide recovery method according to any one of claims 21 to 23, wherein: The carbon dioxide recovery method further comprises the following steps: separating the carbon dioxide from the adsorbent on which the carbon dioxide is adsorbed; and The adsorbent having adsorbed the carbon dioxide is dropped by its own weight in the adsorption space, and the adsorbent from which the carbon dioxide has been separated is brought into contact with the gas again, so that the adsorbent from which the carbon dioxide has been separated adsorbs the carbon dioxide contained in the gas.

25. The carbon dioxide recovery method according to claim 24, wherein: The carbon dioxide is separated from the adsorbent having adsorbed the carbon dioxide by heating the adsorbent having adsorbed the carbon dioxide.

26. The carbon dioxide recovery method according to claim 24 or 25, wherein: The carbon dioxide recovery method further includes a step of recovering the carbon dioxide separated from the adsorbent.

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