Gas recovery device

Abstract

The gas recovery apparatus of this disclosure comprises an adsorbent for adsorbing a target gas, an adsorbent container that is permeable and capable of containing the adsorbent, an inclined member provided inside the adsorbent container for moving the adsorbent, and a uniform member for making the air velocity distribution inside the adsorbent container uniform.

Description

Technical Field

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[0001] The present disclosure relates to a gas recovery device.

Background Art

[0002] Patent Document 1 discloses a device that provides a moving bed of an adsorbent for adsorbing harmful components in a gas flow path containing harmful components, and adsorbs the harmful components in the gas while moving the adsorbent on the moving bed.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In an adsorbent container, if the gap between the adsorbents is large, a large amount of air flow will pass through this gap, resulting in a decrease in the flow rate of the mixed gas containing the target gas passing through the adsorbent. As a result, the adsorption amount of the target gas by the adsorbent decreases, and the recovery efficiency of the target gas decreases. For example, when the mixed gas is air and the target gas is carbon dioxide, since the concentration of carbon dioxide contained in the air is low, it is required to improve the recovery efficiency of carbon dioxide by the adsorbent.

[0005] In view of the above circumstances, an object of the present disclosure is to provide a gas recovery device capable of improving the recovery efficiency of the target gas.

Means for Solving the Problems

[0006] One aspect of the gas recovery device according to the present disclosure includes an adsorbent for adsorbing a target gas, an adsorbent container having air permeability and capable of accommodating the adsorbent, and provided inside the adsorbent container for moving the adsorbent Multiple first an inclined member, and Provided alongside the first inclined members in a direction different from the direction in which the multiple first inclined members are arranged,The system includes a uniform member that makes the air velocity distribution within the adsorbent container uniform. [Effects of the Invention]

[0007] According to this disclosure, it is possible to provide a gas recovery device that can improve the recovery efficiency of the target gas. [Brief explanation of the drawing]

[0008] [Figure 1] This is a block diagram of the gas recovery device according to Embodiment 1. [Figure 2] This is a perspective view of the adsorption member according to Embodiment 1. [Figure 3] This is a schematic diagram of the gas recovery device according to Embodiment 1. [Figure 4] This is a schematic diagram of the adsorption unit according to Embodiment 1. [Figure 5] This is a schematic diagram of the gas recovery device according to Embodiment 2. [Figure 6] This is a schematic diagram of the adsorption unit according to Embodiment 2. [Figure 7] This is a schematic diagram of the gas recovery device according to Embodiment 3. [Figure 8] This is a schematic diagram of the adsorption unit according to Embodiment 3. [Modes for carrying out the invention]

[0009] Embodiments of this disclosure will be described below with reference to the drawings. However, the scope of this disclosure is not limited to the embodiments described below and can be modified at will within the scope of the technical idea of ​​this disclosure.

[0010] Embodiment 1. Figure 1 is a block diagram of a gas recovery device 1 according to Embodiment 1. The gas recovery device 1 recovers carbon dioxide (the target gas) from air (a mixed gas containing the target gas). The gas recovery device 1 is installed, for example, on the roof of a building (for example, a building or apartment building). However, the installation location of the gas recovery device 1 is not limited to this. The gas recovery device 1 may be installed in an open space next to a building, in the courtyard of an apartment building, in a desert, etc. The gas recovery device 1 may also be installed indoors.

[0011] The gas recovery device 1 comprises an adsorbent 10 (see Figure 2), a blower 20, an adsorption unit 30, a separation unit 50, and a storage unit 60. The adsorbent 10 is contained in the adsorption unit 30.

[0012] Figure 2 is a perspective view of the adsorbent 10. The adsorbent 10 contains a material capable of adsorbing carbon dioxide. Examples of materials capable of adsorbing carbon dioxide include amines, zeolites, silica gel, diatomaceous earth, alumina, activated carbon, etc. Multiple materials may be selected from the above, or materials other than those listed above may be used. The adsorbent 10 is made of a porous material. The adsorbent 10 has a cylindrical shape. The adsorbent 10 is a honeycomb material. The adsorbent 10 may also be granular (for example, bead-shaped (spherical), pellet-shaped (cylindrical)).

[0013] In the following explanation, the vertical direction is referred to as the Z direction. The direction perpendicular to the Z direction is called the X direction, and the direction perpendicular to both the X and Z directions is called the Y direction.

[0014] The air supply unit 20 has a fan (not shown) that forms an air current. As shown in FIG. 3, the air supply unit 20 has an air inlet 21 through which air is taken in from the outside by driving the fan, and an air outlet 22 through which air is discharged to the outside. The air supply unit 20 is, for example, an outdoor unit or an indoor unit of an air conditioning system, or a ventilation fan. In the illustrated example, the air inlet 21 and the air outlet 22 are opposed in the X direction, and in the air supply unit 20, air flows in the X direction. However, the flow direction of the air current in the air supply unit 20 is not limited to this. For example, the air outlet 22 may be provided at the upper part of the air supply unit 20, and the air taken in from the air inlet 21 may be discharged upward. Also, the drive source of the air supply unit 20 may be any device capable of sending wind, and is not limited to a fan.

[0015] As shown in FIGS. 3 and 4, the adsorption unit 30 includes an adsorbent container 31, a plurality of first inclined members 33 (inclined members), and a plurality of second inclined members 34 (uniform members).

[0016] The adsorbent container 31 is installed outside the air supply unit 20. The adsorbent container 31 is installed so as to face the air inlet 21 of the air supply unit 20. Note that the adsorbent container 31 may be installed so as to face the air outlet 22 of the air supply unit 20. The adsorbent container 31 houses a plurality of adsorbents 10. The adsorbent container 31 has air permeability. Specifically, the adsorbent container 31 is provided with an inlet 31a for allowing air to flow into the internal space of the adsorbent container 31 and an outlet 31b for allowing air to flow out from the internal space of the adsorbent container 31. The inlet 31a and the outlet 31b are arranged to face each other in the X direction. Also, the outlet 31b is arranged to face the air inlet 21. By driving the fan of the air supply unit 20, air flows in the X direction through the internal space of the adsorbent container 31 from the inlet 31a toward the outlet 31b. That is, the flow direction of the air current flowing through the adsorbent container 31 is the X direction.

[0017] A plurality of first inclined members 33 and a plurality of second inclined members 34 are provided inside the adsorbent container 31. The first inclined members 33 and the second inclined members 34 are arranged side by side in the X direction (the flow direction of the air flow flowing through the adsorbent container 31). For example, a partition plate 32 having air permeability is provided in the adsorbent container 31. The internal space of the adsorbent container 31 is partitioned into two spaces S1 and S2 in the X direction by the partition plate 32. A plurality of first inclined members 33 are arranged in one space S1, and a plurality of second inclined members 34 are arranged in the other space S2. Note that the internal space of the adsorbent container 31 may be partitioned into two spaces S1 and S2 by configuring the adsorbent container 31 with two containers. If it is possible to arrange the first inclined members 33 and the second inclined members 34 side by side in the X direction inside the adsorbent container 31, the partition plate 32 may not be provided, and the internal space of the adsorbent container 31 may not be partitioned.

[0018] The adsorbent container 31 includes a storage portion 41, an adsorption portion main body 42, and a recovery portion 43.

[0019] The adsorbent 10 is stored in the storage portion 41. The storage portion 41 has an inclined bottom plate 41a. An opening 41b is provided in the inclined bottom plate 41a. The storage portion 41 communicates with the adsorption portion main body 42 through the opening 41b. The storage portion 41 has a valve 41c for opening and closing the opening 41b. When the valve 41c closes the opening 41b, the adsorbent 10 is stored in the storage portion 41. When the valve 41c opens the opening 41b, the adsorbent 10 falls toward the adsorption portion main body 42 by the weight of the adsorbent 10.

[0020] The adsorption portion main body 42 is arranged between the storage portion 41 and the recovery portion 43. The above-mentioned inlet 31a and outlet 31b are provided in the adsorption portion main body 42. Although details will be described later, in the adsorption portion main body 42, the adsorbent 10 contacts the air and adsorbs carbon dioxide contained in the air.

[0021] The recovery unit 43 is located below the adsorption unit body 42. The recovery unit 43 communicates with the adsorption unit body 42 through an opening 43a. The recovery unit 43 recovers the adsorbent 10 that has adsorbed carbon dioxide in the adsorption unit body 42. The recovery unit 43 may be detachable from the adsorption unit body 42.

[0022] As shown in Figure 4, multiple first inclined members 33 and multiple second inclined members 34 are arranged on the suction unit body 42. The first inclined members 33 and the second inclined members 34 are plate-shaped members that are inclined with respect to the horizontal plane (XY plane). The first inclined members 33 and the second inclined members 34 have the same shape. In Figure 4, the first inclined members 33 are shown by solid lines, and the second inclined members 34 are shown by dotted lines.

[0023] The first end 33a of the first inclined member 33 in the longitudinal direction is fixed to the adsorbent container 31. The second end 33b of the first inclined member 33 in the longitudinal direction is away from the adsorbent container 31, and a gap is formed between the second end 33b and the adsorbent container 31. The second end 33b is positioned lower than the first end 33a. Multiple first inclined members 33 are arranged side by side in the Z direction. Adjacent first inclined members 33 in the Z direction are arranged so that their inclination directions are opposite. When viewed from the X direction (i.e., in the YZ plane shown in Figure 4), adjacent first inclined members 33 in the Z direction are arranged so that at least a portion of them overlap each other in the Y direction. Adjacent first inclined members 33 in the Z direction are arranged such that the second end 33b of one first inclined member 33 is located in the Y direction between the first end 33a and the second end 33b of the other first inclined member 33. The adsorbent 10 rolls or slides along the first inclined member 33 from the first end 33a to the second end 33b due to its own weight. The adsorbent 10 falls downward through the gap between the second end 33b and the adsorbent container 31 and moves to the next first inclined member 33 or the recovery section 43.

[0024] The first end 34a of the second inclined member 34 in the longitudinal direction is fixed to the adsorbent container 31. The second end 34b of the second inclined member 34 in the longitudinal direction is away from the adsorbent container 31, and a gap is formed between the second end 34b and the adsorbent container 31. The second end 34b is positioned lower than the first end 34a. Multiple second inclined members 34 are arranged side by side in the Z direction. Adjacent second inclined members 34 in the Z direction are arranged so that their inclination directions are opposite. When viewed from the X direction (i.e., in the YZ plane shown in Figure 4), adjacent second inclined members 34 in the Z direction are arranged so that at least a portion of them overlap each other in the Y direction. Adjacent second inclined members 34 in the Z direction are arranged such that the second end 34b of one second inclined member 34 is located in the Y direction between the first end 34a and the second end 34b of the other second inclined member 34. The adsorbent 10 rolls or slides along the second inclined member 34 from the first end 34a to the second end 34b due to its own weight. The adsorbent 10 moves downward through the gap between the second end 34b and the adsorbent container 31.

[0025] The first inclined member 33 and the second inclined member 34 are positioned at different heights (i.e., positions in the Z direction). Specifically, when viewed from the X direction, the height of the first end 33a of the first inclined member 33 is different from the height of the first end 34a of the second inclined member 34 adjacent to the first inclined member 33 in the Z direction. When viewed from the X direction, the height of the second end 33b of the first inclined member 33 is different from the height of the second end 34b of the second inclined member 34 adjacent to the first inclined member 33 in the Z direction. When viewed from the X direction, the second inclined member 34 is positioned between two adjacent first inclined members 33 in the Z direction. When viewed from the X direction (i.e., in the YZ plane shown in Figure 4), the first inclined member 33 and the second inclined member 34 adjacent to each other in the Z direction are positioned so that at least a portion of them overlap in the Y direction. The first inclined member 33 and the second inclined member 34, which are adjacent in the Z direction, are arranged such that the second end 33b of the first inclined member 33 is located between the first end 34a and the second end 34b of the second inclined member 34 in the Y direction, and the second end 34b of the second inclined member 34 is located between the first end 33a and the second end 33b of the first inclined member 33 in the Y direction.

[0026] The adsorbent 10 rolls or slides on the first inclined member 33 or the second inclined member 34 due to its own weight. This causes the adsorbent 10 to move downwards from the storage section 41 towards the recovery section 43. The adsorbent 10 comes into contact with the air introduced into the internal space of the adsorbent container 31 through the inlet 31a and adsorbs carbon dioxide contained in the air. The air from which carbon dioxide has been removed by the adsorbent 10 flows out of the internal space of the adsorbent container 31 through the outlet 31b.

[0027] In this case, if the gaps between adsorbents in the adsorbent container are large, a large amount of airflow will pass through these gaps, reducing the airflow rate through the adsorbents. As a result, the amount of carbon dioxide adsorbed by the adsorbents decreases, leading to increased carbon dioxide capture costs and a decrease in carbon dioxide capture efficiency. In this embodiment, the second inclined member 34 is provided alongside the first inclined member 33 in the X direction (the direction of airflow through the adsorbent container 31). As a result, when viewed from the X direction, the gaps between the adsorbents 10 are reduced compared to, for example, the case where only the first inclined member 33 is provided, and the air velocity distribution within the adsorbent container 31 can be made uniform. Consequently, the airflow rate passing through the adsorbents 10 increases, and the amount of carbon dioxide adsorbed by the adsorbents 10 increases. Therefore, carbon dioxide recovery costs can be reduced and the carbon dioxide recovery efficiency can be improved.

[0028] The separation unit 50 is connected to the recovery unit 43. The adsorbent 10 is transported to the separation unit 50 from the recovery unit 43. The separation unit 50 applies heat or pressure to the adsorbent 10 transported from the recovery unit 43 to separate carbon dioxide from the adsorbent 10. For example, the separation unit 50 is equipped with a heating device (not shown) that supplies hot air into the separation unit 50. By heating the adsorbent 10 on which carbon dioxide has been adsorbed with hot air, the carbon dioxide adsorbed on the adsorbent 10 is separated from the adsorbent 10.

[0029] The storage unit 60 communicates with the separation unit 50 via a pipe (not shown). The storage unit 60 has, for example, a cylinder capable of storing carbon dioxide. The carbon dioxide separated from the adsorbent 10 by the separation unit 50 is exhausted from the separation unit 50 and stored in the storage unit 60 via the pipe.

[0030] The gas recovery method of this embodiment will now be described. The gas recovery method comprises an adsorption step, a separation step, and a recovery step.

[0031] In the adsorbent container 31, the adsorbent 10 is stored in the storage section 41. When the opening 41b is opened by the valve 41c, the adsorbent 10 falls toward the adsorption unit body 42 by its own weight and rolls or slides along the inclined members 33 and 34. In the adsorption unit body 42, the adsorbent 10 comes into contact with the air and adsorbs carbon dioxide contained in the air (adsorption process). The adsorbent 10, which has adsorbed carbon dioxide, passes through the opening 43a and is collected in the recovery section 43. The adsorbent 10 collected in the recovery section 43 is transported to the separation section 50. In the separation section 50, carbon dioxide is separated from the adsorbent 10 (separation process). The carbon dioxide separated from the adsorbent 10 is exhausted from the separation unit 50 and stored in the storage unit 60 (recovery process).

[0032] As described above, the gas recovery device 1 according to this embodiment comprises an adsorbent 10 for adsorbing a target gas, an adsorbent container 31 that is permeable and can contain the adsorbent 10, a first inclined member 33 provided inside the adsorbent container 31 for moving the adsorbent 10, and a second inclined member 34 as a uniforming member for making the air velocity distribution inside the adsorbent container 31 uniform.

[0033] The second inclined member 34 (uniform member) makes the air velocity distribution within the adsorbent container 31 uniform. As a result, the flow rate of the mixed gas containing the target gas passing through the adsorbent 10 increases, and the amount of target gas adsorbed by the adsorbent 10 increases. Therefore, the cost of recovering the target gas can be reduced, and the recovery efficiency of the target gas can be improved.

[0034] Furthermore, the uniform member is a second inclined member 34 positioned alongside the first inclined member 33 in the direction of airflow through the adsorbent container 31, and is used to move the adsorbent 10. With the above configuration, compared to, for example, the case where only the first inclined member 33 is provided, the gaps between the adsorbents 10 become smaller, the flow rate of the mixed gas passing through the adsorbents 10 increases, and the amount of target gas adsorbed by the adsorbents 10 increases. In addition, the number of adsorbents 10 that can be contained in the adsorbent container 31 increases. As a result, the recovery efficiency of the target gas can be further improved.

[0035] Furthermore, the first inclined member 33 and the second inclined member 34 are of different heights. According to the above configuration, even if the first inclined member 33 and the second inclined member 34 are arranged side by side, it is possible to suppress an increase in the overall pressure loss of the adsorbent container 31.

[0036] Furthermore, the first inclined member 33 and the second inclined member 34 have the same shape. According to the above configuration, the manufacturing cost of the gas recovery device 1 can be reduced, and therefore the cost of recovering the target gas can be reduced.

[0037] Furthermore, the adsorbent 10 is cylindrical or spherical. According to the above configuration, by allowing the adsorbent 10 to roll along the first inclined member 33, the need for transport power for the adsorbent 10 is eliminated, thereby reducing the cost of recovering the target gas.

[0038] Embodiment 2. Next, the gas recovery device 1 according to Embodiment 2 will be described. Since the basic configuration of the gas recovery device 1 according to this embodiment is the same as that of Embodiment 1, the differences will be explained in detail.

[0039] As shown in Figures 5 and 6, in this embodiment, the first inclined member 33 and the second inclined member 34 are arranged side by side in the Y direction inside the adsorbent container 31. For example, the adsorbent container 31 is provided with a permeable partition plate 35, which divides the internal space of the adsorbent container 31 into two spaces S3 and S4 in the Y direction. Multiple first inclined members 33 are arranged in one space S3, and multiple second inclined members 34 are arranged in the other space S4. Note that the direction in which the first inclined members 33 and the second inclined members 34 are aligned is not limited to the Y direction, but can be horizontal and intersect the direction of airflow through the adsorbent container 31.

[0040] In space S3, a plurality of first inclined members 33 are arranged in a line in the Z direction. In space S4, a plurality of second inclined members 34 are arranged in a line in the Z direction. In this embodiment, the first inclined members 33 and the second inclined members 34 may be arranged to have the same height, or they may be arranged to have different heights.

[0041] In this embodiment, the second inclined member 34 is provided alongside the first inclined member 33 in the Y direction (horizontal direction, intersecting the flow direction of the airflow circulating through the adsorbent container 31). That is, the inclined members 33 and 34 are provided in two rows in the Y direction. As a result, compared to the case where the inclined members are provided in one row in the Y direction, for example, the gaps between the adsorbents 10 become smaller, and the occupancy rate of the adsorbent 10 in the adsorbent container 31 increases. More specifically, if the shape of the adsorbent container 31 is the same, providing the inclined members 33 and 34 in two rows in the Y direction increases the number of inclined members 33 and 34 that can be arranged in the Z direction compared to the case where the inclined members are provided in one row in the Y direction. Therefore, the distance between multiple inclined members 33 and 34 in the Z direction becomes smaller, and the gaps between the adsorbents 10 become smaller. By increasing the occupancy rate of the adsorbent 10 in the adsorbent container 31, the air velocity distribution within the adsorbent container 31 can be made uniform. As a result, the airflow rate passing through the adsorbent 10 increases, and the amount of carbon dioxide adsorbed by the adsorbent 10 increases. Therefore, carbon dioxide recovery costs can be reduced and the carbon dioxide recovery efficiency can be improved.

[0042] As described above, in this embodiment, the uniform member is a second inclined member 34 that is arranged horizontally, in a direction intersecting the flow direction of the airflow circulating through the adsorbent container 31, and is positioned alongside the first inclined member 33 to move the adsorbent 10. With the above configuration, for example, the gaps between the adsorbents 10 become smaller compared to the case where the inclined members are arranged in a single row in the direction described above. As a result, the flow rate of the mixed gas passing through the adsorbents 10 increases, and the amount of target gas adsorbed by the adsorbents 10 increases. In addition, the number of adsorbents 10 that can be contained in the adsorbent container 31 increases. Therefore, the recovery efficiency of the target gas can be further improved.

[0043] Embodiment 3. Next, we will describe the gas recovery device 1 according to Embodiment 3. Since the basic configuration of the gas recovery device 1 according to this embodiment is the same as that of Embodiment 1, we will focus on describing the differences.

[0044] As shown in Figures 7 and 8, in this embodiment, only the first inclined member 33 is provided inside the adsorbent container 31. The adsorbent container 31 is provided with a resistive member 36 (uniform member). In the illustrated example, the resistive member 36 is provided on the outside of the adsorbent container 31. However, the resistive member 36 may also be provided on the inside of the adsorbent container 31.

[0045] The resistance member 36 is positioned to face either the inlet 31a or outlet 31b of the adsorbent container 31 in the X direction (the direction of airflow through the adsorbent container). When viewed from the X direction, the resistance member 36 is positioned to overlap with the portion of the adsorption unit body 42 other than the region where the adsorbent 10 moves on the first inclined member 33. In other words, when viewed from the X direction, the resistance member 36 is positioned not to overlap with the region where the adsorbent 10 moves on the first inclined member 33. The airflow resistance of the resistance member 36 in the X direction is 1 to 1.2 times the airflow resistance of the adsorbent 10. By providing the resistance member 36, the air velocity distribution inside the adsorbent container 31 can be made uniform.

[0046] The relationship between the airflow resistance of the resistive member 36 and the airflow resistance of the adsorbent 10 will be explained. If the airflow resistance of the resistive member 36 is less than the airflow resistance of the adsorbent 10 (i.e., the airflow resistance of the resistive member 36 is less than 1 times the airflow resistance of the adsorbent 10), the pressure loss of the resistive member 36 will be lower than the pressure loss of the adsorbent 10, causing the amount of air passing through the resistive member 36 to increase compared to the amount of air passing through the adsorbent 10, thereby reducing the airflow rate passing through the adsorbent 10. Furthermore, if the airflow resistance of the resisting member 36 is too great compared to the airflow resistance of the adsorbent 10 (i.e., the airflow resistance of the resisting member 36 is greater than 1.2 times the airflow resistance of the adsorbent 10), the pressure loss of the resisting member 36 will be too high compared to the pressure loss of the adsorbent 10. As a result, the overall pressure loss of the adsorbent container 31 will increase, and the airflow rate passing through the adsorbent 10 will decrease. In addition, the primary function of the air blower 20 in which the adsorbent container 31 is provided will decrease. For example, if the air blower 20 is an outdoor or indoor unit of an air conditioning system, an increase in the overall pressure loss of the adsorbent container 31 will reduce the airflow capacity (air volume) of the air blower 20, and thus the heat exchange performance will decrease. If the air blower 20 is a ventilation fan, an increase in the overall pressure loss of the adsorbent container 31 will reduce the airflow capacity (air volume) of the air blower 20. In order to increase the airflow rate passing through the adsorbent 10 while minimizing the reduction in the primary function of the air blower 20, the airflow resistance of the resistance member 36 in the X direction is set to 1 to 1.2 times the airflow resistance of the adsorbent 10.

[0047] As described above, in this embodiment, the uniform member is a resistance member 36 provided in the adsorbent container 31, and the airflow resistance in the direction of airflow through the adsorbent container 31 is 1 to 1.2 times that of the adsorbent 10. With the above configuration, the resistance member 36 can make the air velocity distribution within the adsorbent container 31 uniform, increasing the flow rate of the mixed gas passing through the adsorbent 10, and increasing the amount of target gas adsorbed by the adsorbent 10. Therefore, the recovery efficiency of the target gas can be further improved.

[0048] The technical scope of this disclosure is not limited to the embodiments described above, and various modifications can be made without departing from the spirit of this disclosure.

[0049] For example, in Embodiment 1, the inclined members 33 and 34 may be arranged in three or more rows in the X direction. In Embodiment 2, the inclined members 33 and 34 may be arranged in three or more rows in the Y direction.

[0050] In embodiments 1 to 3, the air blower 20 may be omitted. In this case, for example, the suction unit 30 may be placed outdoors, and air may be circulated to the suction unit body 42 by the wind blowing outdoors. Furthermore, in embodiments 1 to 3, the storage unit 41 may be omitted. In this case, for example, the adsorbent 10 may be supplied directly to the adsorption unit body 42. Furthermore, in embodiments 1 to 3, the recovery unit 43 may be omitted. In this case, for example, the adsorbent 10 may be supplied directly to the separation unit 50. In other words, the adsorbent 10 that has moved from the adsorption unit body 42 may be transported to the separation unit 50 without being recovered in the recovery unit 43.

[0051] Furthermore, while embodiments 1 to 3 describe examples where the target gas is carbon dioxide, this disclosure is not limited to this. The gas recovery apparatus of this disclosure is also applicable when the target gas is nitrogen oxides (NOx), methane, water, or formaldehyde, etc. Moreover, the mixed gas containing the target gas is not limited to air.

[0052] Other embodiments or modifications described above may be combined as appropriate.

[0053] For example, in embodiments 1 and 2, the adsorbent container 31 may be provided with a resistive member 36. [Explanation of symbols]

[0054] 1...Gas recovery device, 10...Adsorbent, 20...Air blower, 31...Adsorbent container, 33...First inclined member (inclined member), 34...Second inclined member (uniform member), 36...Resistance member (uniform member)

Claims

1. An adsorbent that adsorbs the target gas, An adsorbent container that is breathable and capable of containing the adsorbent, A plurality of first inclined members are provided inside the adsorbent container for moving the adsorbent, A uniform member is provided alongside the first inclined members in a direction different from the direction in which the plurality of first inclined members are arranged, and which makes the air velocity distribution within the adsorbent container uniform, A gas recovery device equipped with the following features.

2. The gas recovery apparatus according to claim 1, wherein the uniform member is a second inclined member for moving the adsorbent, and is arranged in the direction of airflow through the adsorbent container.

3. The gas recovery apparatus according to claim 1, wherein the uniform member is a second inclined member for moving the adsorbent, and is arranged horizontally and in a direction intersecting the flow direction of the airflow through the adsorbent container.

4. The gas recovery apparatus according to claim 2, wherein the first inclined member and the second inclined member are of different heights.

5. The gas recovery apparatus according to claim 2 or 3, wherein the first inclined member and the second inclined member have the same shape.

6. The gas recovery apparatus according to claim 1, wherein the uniform member is a resistance member provided in the adsorbent container, and the airflow resistance in the direction of airflow flowing through the adsorbent container is 1 to 1.2 times the airflow resistance of the adsorbent.

7. The gas recovery apparatus according to any one of claims 1 to 4, wherein the adsorbent is cylindrical or spherical.

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