Carbon dioxide recovery device, carbon dioxide recovery method, and carbon dioxide recovery program product

Abstract

The invention provides a carbon dioxide recovery device, a carbon dioxide recovery method, and a carbon dioxide recovery program product. A carbon dioxide immobilization system according to the present disclosure is provided with: a first device containing a first adsorbent that adsorbs at least a portion of carbon dioxide contained in outside air to be treated; a second device containing a second adsorbent that adsorbs at least a portion of the carbon dioxide contained in the outside air; and an exhaust passage which connects the first device and the second device, and through which outside air, which has passed through the first device so that at least a portion of the carbon dioxide is adsorbed by the first adsorbent, passes through the second device so that the second adsorbent is cooled, via the exhaust passage.

Description

Technical Field

[0001] The present disclosure relates to a carbon dioxide recovery device, a carbon dioxide recovery method, and a carbon dioxide recovery program. Background Art

[0002] Patent Document 1 discloses a carbon dioxide recovery device that heats or cools a carbon dioxide (CO2) adsorbent material by providing a flow channel through which a heat carrier layered with the CO2 adsorbent material passes. The heat carrier in Patent Document 1 does not come into direct contact with the CO2 adsorbent material.

[0003] Patent Document 1: Japanese Patent Application Laid-Open No. 2023-013167 Summary of the Invention

[0004] Although cooling water is used as a means for cooling the CO2 adsorbent in Patent Document 1, additional power such as a pump is required to flow the cooling water, which deteriorates the CO2 recovery efficiency relative to the required energy. A device that improves the cooling efficiency is desired.

[0005] The present disclosure has been made to solve such problems, and an object thereof is to provide a carbon dioxide recovery device, a carbon dioxide recovery method, and a carbon dioxide recovery program that can improve the cooling efficiency of a CO 2 adsorbent.

[0006] A carbon dioxide recovery device according to one embodiment of the present disclosure comprises: a first device comprising a first adsorbent material for adsorbing at least a portion of the carbon dioxide contained in the external air of a treatment object; a second device comprising a second adsorbent material for adsorbing at least a portion of the carbon dioxide contained in the external air; and an exhaust passage connecting the first device and the second device so that the external air that has passed through the first device in a manner such that at least a portion of the carbon dioxide is adsorbed by the first adsorbent material passes through the second device via the exhaust passage in a manner such that the second adsorbent material is cooled.

[0007] The first adsorption material and the second adsorption material are arranged inside a cylindrical cartridge container. The first device has one or more cartridge containers containing the first adsorption material, and the second device has one or more cartridge containers containing the second adsorption material. The external air passing through the interior of the cartridge container adsorbs at least a portion of the carbon dioxide, and the external air passing through the periphery of the cartridge container cools the second adsorption material.

[0008] In the above-mentioned carbon dioxide recovery device, it can also be set that the first device includes: a first inlet, which allows the external air to flow in from the interior of the cartridge container; a first outlet, which allows the external air that has passed through the interior of the cartridge container to be discharged; a first inlet, which allows the external air to pass through the periphery of the cartridge container to be introduced; a first outlet, which allows the external air that has passed through the periphery of the cartridge container to be discharged, and the second device includes: a second inlet, which allows the external air to flow in from the interior of the cartridge container; a second outlet, which allows the external air that has passed through the interior of the cartridge container to be discharged; a second inlet, which allows the external air to pass through the periphery of the cartridge container to be introduced, and a second outlet, which allows the external air that has passed through the periphery of the cartridge container to be discharged.

[0009] In the above-mentioned carbon dioxide recovery device, it can also be set to further include: a plurality of opening and closing valves, which are arranged on the first device, the second device and the exhaust passage; a control unit, which switches from a first state to a second state by controlling the plurality of opening and closing valves, the temperature rise of the first adsorbent material and the temperature rise of the second adsorbent material. In the first state, the external air that has passed through the first device in a manner such that at least a portion of the carbon dioxide is adsorbed by the first adsorbent material passes through the second device via the exhaust passage in a manner such that the second adsorbent material is cooled. In the second state, the first adsorbent material is heated to desorb the carbon dioxide from the first adsorbent material and release it to the outside.

[0010] In the above-mentioned carbon dioxide recovery device, it can also be set to further include: a plurality of on-off valves, which are arranged on the first device, the second device and the exhaust passage; a control unit, which switches between a first state and a third state by controlling the plurality of on-off valves, the temperature rise of the first adsorbent material and the temperature rise of the second adsorbent material. In the first state, the external air that has passed through the first device in a manner that at least a portion of the carbon dioxide is adsorbed by the first adsorbent material passes through the second device via the exhaust passage in a manner that cools the second adsorbent material. In the third state, the external air that has passed through the second device in a manner that at least a portion of the carbon dioxide is adsorbed by the second adsorbent material passes through the first device via the exhaust passage in a manner that cools the first adsorbent material.

[0011] In the above-mentioned carbon dioxide recovery device, it can also be set that the control unit switches to the third state after switching from the first state to the second state, and switches to the first state after switching from the third state to the fourth state. In the second state, the first adsorption material is heated to desorb the carbon dioxide from the first adsorption material and release it to the outside, and in the fourth state, the second adsorption material is heated to desorb the carbon dioxide from the second adsorption material and release it to the outside.

[0012] In the above-mentioned carbon dioxide recovery device, it can also be set that the exhaust channel includes: a first exhaust channel, which allows the external air to flow from the first device to the second device; a second exhaust channel, which allows the external air to flow from the second device to the first device, and the first exhaust channel and the second exhaust channel include parts that are connected from different directions relative to the first device and the second device.

[0013] In the above-mentioned carbon dioxide recovery device, it can also be set that the first device includes: a first inlet for allowing the external air to flow in; a first outlet for discharging the external air flowing in from the first inlet; a first inlet for introducing the external air discharged from the second device; a first outlet for discharging the external air introduced from the first inlet to the outside, and the second device includes: a second inlet for allowing the external air to flow in; a second outlet for discharging the external air flowing in from the second inlet; a second inlet for introducing the external air discharged from the first device; a second outlet for discharging the external air introduced from the second inlet to the outside, and the exhaust passage includes: a common space, which is arranged between the first device and the second device; a first outlet space, which is arranged between the common space and the first outlet; a first inlet space, which is arranged between the common space and the first inlet; a second outlet a discharge space, which is arranged between the common space and the second discharge port; a second inlet space, which is arranged between the common space and the second inlet, the plurality of opening and closing valves include: a first inlet valve, which opens and closes the first inlet; a first discharge valve, which opens and closes between the common space and the first discharge space; a first inlet valve, which opens and closes between the common space and the first inlet space; a second inlet valve, which opens and closes the second inlet; a second discharge valve, which opens and closes between the common space and the second discharge space; a second inlet valve, which opens and closes between the common space and the second inlet space, the first discharge valve, the first inlet valve, the second discharge valve and the second inlet valve are arranged on the exhaust channel, the first exhaust channel includes the first discharge space, the common space and the second inlet space that are connected to each other, and the second exhaust channel includes the second discharge space, the common space and the first inlet space that are connected to each other.

[0014] The carbon dioxide recovery device may further include a first desorption valve that opens and closes between the first discharge space and the outside, and a second desorption valve that opens and closes between the second discharge space and the outside.

[0015] In the above-mentioned carbon dioxide recovery device, it can also be arranged that a discharge outlet for discharging the external air to the outside is arranged on the opposite side of the inlet in the second device connected to the first exhaust channel, and an inlet for allowing the external air to flow in from the outside is arranged on the opposite side of the outlet in the second device connected to the second exhaust channel.

[0016] One embodiment of the present disclosure relates to a carbon dioxide recovery method, which is a carbon dioxide recovery method using a carbon dioxide recovery device, wherein the carbon dioxide recovery device comprises: a first device, which includes a first adsorption material for adsorbing at least a portion of the carbon dioxide contained in the external air of the treatment object; a second device, which includes a second adsorption material for adsorbing at least a portion of the carbon dioxide contained in the external air; an exhaust passage, which connects the first device with the second device, and the carbon dioxide recovery method comprises: a first adsorption step, in which the external air passes through the first device in a manner that at least a portion of the carbon dioxide is adsorbed by the first adsorption material; a first cooling step, in which the external air passing through the first device in the first adsorption step cools the second adsorption material, and passes the external air through the second device via the exhaust passage.

[0017] A carbon dioxide recovery program product according to one embodiment of the present disclosure includes a carbon dioxide recovery program, the carbon dioxide recovery program being a carbon dioxide recovery program using a carbon dioxide recovery device, wherein the carbon dioxide recovery device comprises: a first device including a first adsorbent material that adsorbs at least a portion of carbon dioxide contained in external air to be processed; a second device including a second adsorbent material that adsorbs at least a portion of the carbon dioxide contained in the external air; an exhaust duct that connects the first device and the second device; a plurality of on-off valves, the plurality of on-off valves being provided on the first device, the second device, and the exhaust duct; and a control unit that controls the plurality of on-off valves, the temperature increase of the first adsorbent material, and the temperature increase of the second adsorbent material, wherein the carbon dioxide recovery program causes a computer to execute the following steps: a first adsorption step in which the external air passes through the first device in such a manner that at least a portion of the carbon dioxide is adsorbed by the first adsorbent material; and a first cooling step in which the external air passes through the second device via the exhaust duct in such a manner that the external air that passes through the first device in the first adsorption step cools the second adsorbent.

[0018] The above and other objects, features and advantages of the present disclosure will be more fully understood from the detailed description given below and the accompanying drawings which are given by way of illustration only. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a cross-sectional view illustrating the carbon dioxide recovery apparatus according to the first embodiment, and shows a first step in the carbon dioxide recovery apparatus 1 .

[0020] Figure 2This is a cross-sectional view illustrating the carbon dioxide recovery apparatus according to the first embodiment, and shows the second step in the carbon dioxide recovery apparatus 1 .

[0021] Figure 3 This is a cross-sectional view illustrating the carbon dioxide recovery apparatus according to the first embodiment, and shows the third step in the carbon dioxide recovery apparatus 1 .

[0022] Figure 4 This is a cross-sectional view illustrating the carbon dioxide recovery apparatus according to the first embodiment, and shows the fourth step in the carbon dioxide recovery apparatus 1 .

[0023] Figure 5 This is a perspective view illustrating a first adsorbent in the carbon dioxide recovery apparatus according to the first embodiment.

[0024] Figure 6 This is a flowchart illustrating a carbon dioxide recovery method using the carbon dioxide recovery apparatus according to the first embodiment.

[0025] Figure 7 This is a block diagram illustrating a control unit including a computer in the carbon dioxide recovery apparatus according to the first and second embodiments. DETAILED DESCRIPTION

[0026] Hereinafter, the specific structure of the present embodiment will be described with reference to the accompanying drawings. The following description is for illustrating preferred embodiments of the present disclosure, and the scope of the present disclosure is not limited to the following embodiments. In addition, not all of the structures described in the present embodiment are necessary technical means for solving the problems. For the purpose of clarity, the following description and drawings are omitted and simplified as appropriate. In each drawing, the same symbols are used for the same elements, and repeated descriptions are omitted as needed.

[0027] (Implementation 1)

[0028] The carbon dioxide recovery device and carbon dioxide recovery method according to the first embodiment will be described. Figures 1 to 4 This is a cross-sectional view illustrating the carbon dioxide recovery device 1 according to the first embodiment. Figures 1 to 4 Respectively represent the first process, the second process, the third process and the fourth process in the carbon dioxide recovery device 1. The first process includes a first adsorption process and a first cooling process. The second process includes a first heating process and a first desorption process. The third process includes a second adsorption process and a second cooling process. The fourth process includes a second heating process and a second desorption process. The state of the first process is called the first state. The state of the second process is called the second state. The state of the third process is called the third state. The state of the fourth process is called the fourth state. Figures 1 to 4 As shown, the carbon dioxide recovery device 1 includes a first device 100 , a second device 200 , an exhaust passage 300 , a plurality of on-off valves 140 , and a control unit 400 .

[0029] <First Device>

[0030] First device 100 includes first adsorbent 110. First adsorbent 110 adsorbs at least a portion of carbon dioxide contained in the external air being treated. First device 100 includes a housing 101. Housing 101 of first device 100 includes a first inlet 111, a first outlet 112, a first inlet 113, and a first outlet 114.

[0031] The first inlet 111 is an opening for allowing external air to flow into the treatment object. The first outlet 112 is an opening for discharging the external air flowing in from the first inlet 111. The first inlet 113 is an opening for introducing external air exhausted from the second device 200 via the exhaust duct 300. The first outlet 114 is an opening for discharging the external air introduced from the first inlet 113 to the outside. A fan may also be arranged on the outside of the first inlet 111. In this way, external air to the treatment object can be sucked into the first device 100 from the first inlet 111.

[0032] <Second Device>

[0033] Second device 200 includes second adsorbent 210. Second adsorbent 210 adsorbs at least a portion of carbon dioxide contained in the external air being treated. Second device 200 includes a housing 201. Housing 201 of second device 200 includes a second inlet 211, a second outlet 212, a second inlet 213, and a second outlet 214.

[0034] The second inlet 211 is an opening for allowing external air of the treatment object to flow in. The second outlet 212 is an opening for discharging the external air flowing in from the second inlet 211. The second inlet 213 is an opening for introducing external air exhausted from the first device 100 via the exhaust duct 300. The second outlet 214 is an opening for discharging the external air introduced from the second inlet 213 to the outside. A fan may also be arranged at a position closer to the outside than the second inlet 211. In this way, external air of the treatment object can be sucked into the second device 200 from the second inlet 211.

[0035] <Exhaust duct>

[0036] The exhaust duct 300 connects the first device 100 and the second device 200. Thus, outside air that has passed through the first device 100, with at least a portion of the carbon dioxide contained in the outside air being adsorbed by the first adsorbent material 110, passes through the second device 200 via the exhaust duct 300, thereby cooling the second adsorbent material 210. Furthermore, outside air that has passed through the second device 200, with at least a portion of the carbon dioxide contained in the outside air being adsorbed by the second adsorbent material 210, passes through the first device 100 via the exhaust duct 300, thereby cooling the first adsorbent material 110.

[0037] The exhaust passage 300 includes a first exhaust passage 301 (see Figure 1 ) and the second exhaust passage 302 (refer to Figure 3 The first exhaust passage 301 is a passage for allowing external air to flow from the first device 100 to the second device 200. The second exhaust passage 302 is a passage for allowing external air to flow from the second device 200 to the first device 100. The first exhaust passage 301 and the second exhaust passage 302 include portions that communicate with the first device 100 and the second device 200 from different directions.

[0038] A first outlet 114 for discharging external air is provided on the opposite side of the first inlet 113 in communication with the second exhaust duct 302 in the first device 100. A first inlet 111 for allowing external air to flow in is provided on the opposite side of the first outlet 112 in communication with the first exhaust duct 301 in the first device 100. A second outlet 214 for discharging external air is provided on the opposite side of the second inlet 213 in communication with the first exhaust duct 301 in the second device 200. A second inlet 211 for allowing external air to flow in is provided on the opposite side of the second outlet 212 in communication with the second exhaust duct 302 in the second device 200.

[0039] Furthermore, the exhaust duct 300 includes a common space 310, a first exhaust space 321, a first inlet space 331, a second exhaust space 322, and a second inlet space 332. The common space 310 is disposed between the first device 100 and the second device 200. The first exhaust space 321 is disposed between the common space 310 and the first exhaust port 112. The first inlet space 331 is disposed between the common space 310 and the first inlet port 113. The second exhaust space 322 is disposed between the common space 310 and the second exhaust port 212. The second inlet space 332 is disposed between the common space 310 and the second inlet port 213.

[0040] Therefore, the first exhaust passage 301 includes a first exhaust space 321 , a common space 310 , and a second introduction space 332 . The second exhaust passage 302 includes a second exhaust space 322 , a common space 310 , and a first introduction space 331 .

[0041] <On / Off Valve>

[0042] The multiple on-off valves 140 include a first inlet valve 141, a first outlet valve 142, a first inlet valve 143, a first desorption valve 145, a second inlet valve 241, a second outlet valve 242, a second inlet valve 243, and a second desorption valve 245. The first inlet valve 141 opens and closes the first inlet 111. The first outlet valve 142 opens and closes between the common space 310 and the first outlet space 321. The first inlet valve 143 opens and closes between the common space 310 and the first inlet space 331. The first desorption valve 145 opens and closes between the first outlet space 321 and the outside. The second inlet valve 241 opens and closes the second inlet 211. The second outlet valve 242 opens and closes between the common space 310 and the second outlet space 322. The second inlet valve 243 opens and closes between the common space 310 and the second inlet space 332. The second desorption valve 245 opens and closes between the second outlet space 322 and the outside.

[0043] Multiple on-off valves 140 are provided in the first device 100, the second device 200, and the exhaust passage 300. Among the multiple on-off valves 140, the first inlet valve 141, the first outlet valve 142, the first introduction valve 143, and the first desorption valve 145 are provided in the first device 100. Among the multiple on-off valves 140, the second inlet valve 241, the second outlet valve 242, the second introduction valve 243, and the second desorption valve 245 are provided in the second device 200.

[0044] Furthermore, among the plurality of on-off valves 140, the first discharge valve 142, the first inlet valve 143, the second discharge valve 242, and the second inlet valve 243 are provided in the exhaust passage 300. Therefore, the exhaust passage 300 includes the first discharge valve 142, the first inlet valve 143, the second discharge valve 242, and the second inlet valve 243 among the plurality of on-off valves 140.

[0045] Thus, the first exhaust passage 301 includes a first exhaust space 321, a common space 310, and a second inlet space 332, which are connected by opening the first exhaust valve 142 and the second inlet valve 243. In this case, the second exhaust valve 242 and the first inlet valve 143 are closed. The second exhaust passage 302 includes a second exhaust space 322, a common space 310, and a first inlet space 331, which are connected by opening the second exhaust valve 242 and the first inlet valve 143. In this case, the first exhaust valve 142 and the second inlet valve 243 are closed.

[0046] In this manner, the plurality of on-off valves 140 are provided in the first exhaust passage 301 and the second exhaust passage 302. Each of the plurality of on-off valves 140 includes a driving unit so as to be able to open and close a predetermined passage.

[0047] <First adsorbent, second adsorbent>

[0048] Figure 5 FIG. 1 is a perspective view illustrating the first adsorbent 110 in the carbon dioxide recovery apparatus 1 according to the first embodiment. Figure 5 In FIG, a diagram of a cartridge container 120 is enlarged. Figure 5 The first adsorbent 110 is shown in FIG, but the second adsorbent 210 also has the same structure. Therefore, in the description of the first adsorbent 110 in the first device 100, the description of the second adsorbent 210 in the second device 200 is substituted. Figure 5 As shown, the first adsorbent material 110 may also be disposed inside 121 of a cylindrical cartridge container 120 .

[0049] The first device 100 includes one or more cartridge containers 120 containing a first adsorbent material 110. The second device 200 includes one or more cartridge containers 120 containing a second adsorbent material 210. External air passing through the interior 121 of the cartridge container 120 adsorbs at least a portion of the carbon dioxide. External air passing through the periphery 122 of the cartridge container 120 cools the first adsorbent material 110 and the second adsorbent material 210.

[0050] The outer circumference of the cartridge container 120 is preferably formed by a covering member, thereby isolating the interior 121 from the outer circumference 122. The covering member may also be made of resin or metal, for example. To increase the contact area between the outside air passing through the outer circumference 122 and the cartridge container 120, thereby improving cooling performance, a fan or a shot blaster may be provided on the outer circumference.

[0051] A plurality of cylindrical cartridge containers 120 are arranged inside the frame 101 of the first device 100. In addition, one cartridge container 120 may be arranged inside the frame 101 of the first device 100. Hereinafter, a structure in which a plurality of cartridge containers 120 are arranged in the first device 100 will be described. A plurality of cylindrical cartridge containers 120 are arranged between the first inlet 111 and the first outlet 112. For example, the plurality of cartridge containers 120 are arranged so that the central axis of the cartridge container 120 extends in a direction from the first inlet 111 toward the first outlet 112. A shielding plate 111a may also be arranged on the first inlet 111. One end of the cartridge container 120 passes through the shielding plate 111a. In addition, a shielding plate 112a may also be arranged on the first outlet 112. The other end of the cartridge container 120 passes through the shielding plate 112a.

[0052] With this structure, the outside air flowing in from the first inlet 111 can pass through the interior 121 of the cartridge container 120. On the other hand, the outside air flowing in from the first inlet 111 can be prevented from passing through the outer periphery 122 of the cartridge container 120. In addition, the outside air introduced from the first inlet 113 can pass through the outer periphery 122 of the cartridge container 120. On the other hand, the outside air introduced from the first inlet 113 can be prevented from passing through the interior 121 of the cartridge container 120.

[0053] Thus, the first inlet 111 may be an opening for allowing the outside air passing through the interior of the cartridge container 120 to flow in. The first outlet 112 may be an opening for allowing the outside air passing through the interior of the cartridge container 120 to be discharged. The first inlet 113 may be an opening for allowing the outside air passing through the outer periphery of the cartridge container 120 to be introduced. The first outlet 114 may be an opening for allowing the outside air passing through the outer periphery of the cartridge container 120 to be discharged.

[0054] Similarly, the second inlet 211 may be an opening for allowing outside air passing through the interior of the cartridge container 120 to flow in. The second outlet 212 may be an opening for allowing outside air passing through the interior of the cartridge container 120 to be discharged. The second inlet 213 may be an opening for allowing outside air passing through the outer periphery of the cartridge container 120 to be introduced. The second outlet 214 may be an opening for allowing outside air passing through the outer periphery of the cartridge container 120 to be discharged.

[0055] The first adsorbent 110 and the second adsorbent 210 may also include a direct air capture (DAC) component. The interior of the cartridge container 120 may also include a DAC constructed as a honeycomb structure. This increases the surface area exposed to external air.

[0056] The cartridge container 120 may also include a heating member 123. The heating member 123 may be an electrode that applies current to the first adsorbent 110 and the second adsorbent 210. By applying current to the first adsorbent 110 and the second adsorbent 210, the heating member 123 raises the temperature of the first adsorbent 110 and the second adsorbent 210. The heating member 123 is not limited to an electrode and may also be a heater, etc., as long as it can raise the temperature of the first adsorbent 110 and the second adsorbent 210. By raising the temperature of the first adsorbent 110 and the second adsorbent 210, carbon dioxide adsorbed on the first adsorbent 110 and the second adsorbent 210 can be desorbed.

[0057] Thus, the carbon dioxide recovery apparatus 1 of this embodiment may also use DAC achieved by temperature fluctuation as the first adsorbent 110 and the second adsorbent 210. In this case, the first adsorbent 110 and the second adsorbent 210 need to be cooled after the temperature is increased.

[0058] Generally, there are various methods for cooling the first adsorbent material 110 and the second adsorbent material 210, including water cooling with a water-cooling device and air cooling with an air-cooling device. However, in both cases, additional power is required. In contrast, in this embodiment, the outside air that has passed through the first device 100 while being adsorbed by the first adsorbent material 110 within the interior 121 of the cartridge container 120 passes through the second device 200 to cool the outer periphery 122 of the cartridge container 120 containing the second adsorbent material 210. In other words, by exhausting the gas exhausted during adsorption through the cartridge container 120 required for cooling, the adsorbent material can be cooled without consuming additional power.

[0059] Furthermore, since an exhaust passage is formed around the cartridge container 120 containing the first adsorbent 110 and the second adsorbent 210, it can be thermally insulated with air. Consequently, the heat transfer path from the first adsorbent 110 and the second adsorbent 210 can be reduced when the first adsorbent 110 and the second adsorbent 210 are heated to desorb carbon dioxide. Consequently, heat loss can be reduced.

[0060] <Control Department>

[0061] The control unit 400 is connected to the plurality of on-off valves 140 in a manner capable of transmitting an operation signal to the plurality of on-off valves 140 via a communication line, including at least one of wired and wireless communication. Thus, the control unit 400 controls the opening and closing of the plurality of on-off valves 140. Furthermore, the control unit 400 is connected to the heating element 123, which heats the first adsorbent 110 and the second adsorbent 210, in a manner capable of transmitting an operation signal to the heating element 123. Thus, the control unit 400 controls the temperature increase of the first adsorbent 110 and the second adsorbent 210. Furthermore, the control unit 400 is connected to the fans, which flow outside air into the first device 100 and the second device 200, in a manner capable of transmitting an operation signal to the fans. Thus, the control unit 400 controls the fans.

[0062] The controller 400 switches from the first state to the second state by controlling the multiple on-off valves 140, the temperature increase of the first adsorbent 110, and the temperature increase of the second adsorbent 210. Furthermore, the controller 400 switches from the first state to the second state and then to the third state by controlling the multiple on-off valves 140, the temperature increase of the first adsorbent 110, and the temperature increase of the second adsorbent 210. Furthermore, the controller 400 may switch from the third state to the fourth state and then to the first state. The controller 400 may also repeatedly switch from the first state to the fourth state. In this manner, the controller 400 may switch between the first state and the third state by controlling the multiple on-off valves 140, the temperature increase of the first adsorbent 110, and the temperature increase of the second adsorbent 210.

[0063] The control unit 400 can also use various parameters as the timing for switching between processes. For example, the control unit 400 can switch between processes based on time or based on monitored temperature. Furthermore, the control unit 400 can switch between processes based on the monitored carbon dioxide concentration of a predetermined component or based on the flow rate flowing into the first inlet 111 and the second inlet 211.

[0064] In the first state, the controller 400 opens the first inlet valve 141, the first outlet valve 142, and the second inlet valve 243. On the other hand, in the first state, the controller 400 closes the first inlet valve 143, the first desorption valve 145, the second inlet valve 241, the second outlet valve 242, and the second desorption valve 245. Thus, in the first state, outside air that has passed through the first device 100, such that at least a portion of its carbon dioxide is adsorbed by the first adsorbent 110, passes through the second device 200 via the exhaust duct 300 to cool the second adsorbent 210. For example, outside air that has passed through the interior 121 of the cartridge container 120 in the first device 100 passes through the outer periphery 122 of the cartridge container 120 in the second device 200 via the first exhaust duct 301.

[0065] In the second state, the controller 400 opens the first desorption valve 145. Meanwhile, in the second state, the controller 400 closes the first inlet valve 141, the first outlet valve 142, the first inlet valve 143, the second inlet valve 241, the second outlet valve 242, the second inlet valve 243, and the second desorption valve 245. Furthermore, the controller 400 raises the temperature of the first adsorbent 110. Thus, the controller 400 raises the temperature of the first adsorbent 110 in the second state, desorbing carbon dioxide from the first adsorbent 110 and releasing it to the outside.

[0066] In the third state, the controller 400 opens the second inlet valve 241, the second outlet valve 242, and the first inlet valve 143. On the other hand, in the third state, the controller 400 closes the second inlet valve 243, the second desorption valve 245, the first inlet valve 141, the first outlet valve 142, and the first desorption valve 145. Thus, in the third state, outside air that has passed through the second device 200, such that at least a portion of the carbon dioxide in the outside air is adsorbed by the second adsorbent material 210, passes through the first device 100 via the exhaust passage 300 to cool the first adsorbent material 110. For example, outside air that has passed through the interior 121 of the cartridge container 120 in the second device 200 passes through the outer periphery 122 of the cartridge container 120 in the first device 100 via the second exhaust passage 302.

[0067] In the fourth state, the controller 400 opens the second desorption valve 245. Meanwhile, in the fourth state, the controller 400 closes the first inlet valve 141, the first outlet valve 142, the first inlet valve 143, the first desorption valve 145, the second inlet valve 241, the second outlet valve 242, and the second inlet valve 243. Furthermore, the controller 400 raises the temperature of the second adsorbent 210. Thus, in the fourth state, the controller 400 raises the temperature of the second adsorbent 210 to desorb carbon dioxide from the second adsorbent 210 and release it to the outside.

[0068] <Carbon dioxide recovery method>

[0069] Next, a carbon dioxide recovery method using the carbon dioxide recovery apparatus 1 in this embodiment will be described. Figure 6 FIG. 1 is a flow chart illustrating a carbon dioxide recovery method using the carbon dioxide recovery device 1 according to the first embodiment. Figure 6 As shown, the carbon dioxide recovery method of this embodiment includes a first process (step S10), a first switching process (step S15), a second process (step S20), a second switching process (step S25), a third process (step S30), a third switching process (step S35), a fourth process (step S40), a judgment process (step S44) and a fourth switching process (step S45).

[0070] <First Step>

[0071] like Figure 1 as well as Figure 6 As shown, the first step includes a first adsorption step (step S11) and a first cooling step (step S12). In the first adsorption step, outside air is passed through the first device 100 so that at least a portion of the carbon dioxide is adsorbed by the first adsorbent material 110. During the first adsorption step, outside air passing through the interior 121 of the cartridge container 120 can also adsorb at least a portion of the carbon dioxide. In the first cooling step, outside air is passed through the second device 200 via the exhaust duct 300 so that the outside air passing through the first device 100 in the first adsorption step cools the second adsorbent material 210. During the first cooling step, outside air passing through the outer periphery 122 of the cartridge container 120 cools the second adsorbent material 210.

[0072] The first switching step switches from the first step to the second step by controlling the multiple on-off valves 140 and increasing the temperature. For example, the controller 400 opens the first desorption valve 145. Meanwhile, the controller 400 closes the first inflow valve 141, the first outflow valve 142, the first inlet valve 143, the second inflow valve 241, the second outflow valve 242, the second inlet valve 243, and the second desorption valve 245. Furthermore, the controller 400 sends an actuation signal to increase the temperature of the first adsorbent 110. In this manner, the controller 400 switches from the first step to the second step.

[0073] <Second step>

[0074] like Figure 2 as well as Figure 6 As shown, the second step includes a first temperature increase step (step S21) and a first desorption step (step S22). The first temperature increase step increases the temperature of the first adsorbent 110. This allows carbon dioxide to be desorbed from the first adsorbent 110. In the first desorption step, carbon dioxide is desorbed from the first adsorbent 110 and released to the outside.

[0075] The second switching step switches from the second step to the third step by controlling the multiple on-off valves 140 and the temperature increase. For example, the controller 400 opens the second inlet valve 241, the second outlet valve 242, and the first inlet valve 143. Meanwhile, the controller 400 closes the second inlet valve 243, the second desorption valve 245, the first inlet valve 141, the first outlet valve 142, and the first desorption valve 145. Furthermore, the controller 400 sends an actuation signal to stop heating the first adsorbent 110. In this manner, the controller 400 switches from the second step to the third step.

[0076] <Third step>

[0077] like Figure 3 as well as Figure 6 As shown, the third step includes a second adsorption step (step S31) and a second cooling step (step S32). In the third adsorption step, external air is passed through the second device 200 so that at least a portion of the carbon dioxide is adsorbed by the second adsorbent material 210. In the second adsorption step, external air passing through the interior 121 of the cartridge container 120 can also adsorb at least a portion of the carbon dioxide. In the second cooling step, external air is passed through the first device 100 via the exhaust duct 300 so that the external air passing through the second device 200 in the second adsorption step cools the first adsorbent material 110. In the second cooling step, external air passing through the outer periphery 122 of the cartridge container 120 cools the first adsorbent material 110.

[0078] The third switching step switches from the third step to the fourth step by controlling the multiple on-off valves 140 and increasing the temperature. For example, the controller 400 opens the second desorption valve 245. Meanwhile, the controller 400 closes the first inflow valve 141, the first outflow valve 142, the first inlet valve 143, the first desorption valve 145, the second inflow valve 241, the second outflow valve 242, and the second inlet valve 243. Furthermore, the controller 400 sends an actuation signal to increase the temperature of the second adsorbent 210. In this manner, the controller 400 switches from the third step to the fourth step.

[0079] <Fourth step>

[0080] like Figure 4 as well as Figure 6 As shown, the fourth step includes a second temperature increase step (step S41) and a second desorption step (step S42). In the second temperature increase step, the temperature of the second adsorbent 210 is increased. This allows carbon dioxide to be desorbed from the second adsorbent 210. In the second desorption step, carbon dioxide is desorbed from the second adsorbent 210 and released to the outside.

[0081] The judgment step (step S44) judges whether to end the process. If it is judged that the process is to be ended (if "yes"), the process is ended. On the other hand, if it is judged that the process is not to be ended (if "no"), the process proceeds to the fourth switching step.

[0082] In the fourth switching step, the process switches from the fourth step to the first step. For example, the controller 400 opens the first inlet valve 141, the first outlet valve 142, and the second inlet valve 243. Meanwhile, the controller 400 closes the first inlet valve 143, the first desorption valve 145, the second inlet valve 241, the second outlet valve 242, and the second desorption valve 245. Furthermore, the controller 400 sends an actuation signal to stop heating the second adsorbent 210. In this manner, the controller 400 switches from the fourth step to the first step.

[0083] In this manner, the carbon dioxide recovery method of this embodiment can also repeatedly perform steps 1 to 4. Generally speaking, the carbon dioxide recovery method switches between the first adsorption step and the first cooling step in the first step and the second adsorption step and the second cooling step in the third step by controlling the multiple on-off valves 140 and the temperature increase.

[0084] Next, the effects of this embodiment will be described. Since the carbon dioxide recovery device 1 of this embodiment can utilize the outside air used for carbon dioxide adsorption by the first adsorbent 110 to cool the second adsorbent 210, no new power, such as that required to circulate the refrigerant, is required, thereby improving cooling efficiency.

[0085] For example, Patent Document 1 discloses a carbon dioxide recovery device, which stacks a plurality of plate-shaped adsorption plates that adsorb carbon dioxide contained in the external air at intervals. Carbon dioxide is adsorbed when the external air passes between the adsorption plates. In Patent Document 1, a plurality of tubes are provided that penetrate in the overlapping direction relative to the adsorption plates. These tubes serve as heat carrier circulation channels for circulating heat carriers, thereby controlling the temperature of the adsorption plates. In Patent Document 1, a pump for flowing the medium is required to cool the medium to a temperature suitable for adsorption, thereby increasing the energy required to recover carbon dioxide.

[0086] On the other hand, the carbon dioxide recovery apparatus 1 of the present embodiment does not require new power for flowing the refrigerant, and thus can improve the cooling efficiency.

[0087] Furthermore, the carbon dioxide recovery apparatus 1 of this embodiment includes an exhaust passage 300 connecting the first apparatus 100 and the second apparatus 200. Furthermore, by controlling the on-off valve 140, the outside air used for adsorption by one of the first adsorbent 110 and the second adsorbent 210 can be used to cool the other. Therefore, since both adsorbents can be cooled by the outside air supplied by the other, cooling efficiency can be further improved.

[0088] The first adsorbent 110 and the second adsorbent 210 can also be placed inside the interior 121 of the cylindrical container 120. In this case, the outside air passing through the interior 121 of the container 120 adsorbs at least a portion of the carbon dioxide, while the outside air passing through the periphery 122 of the container 120 cools the adsorbent. Since the cooling outside air does not come into contact with the high-temperature adsorbent, the reaction is suppressed, and degradation of the adsorbent can be prevented.

[0089] Since the first exhaust passage 301 and the second exhaust passage 302 communicate with the first adsorbent 110 and the second adsorbent 210 from different directions, the adsorption process and the cooling process can be separated, thereby improving the cooling efficiency.

[0090] Since an exhaust passage is formed around the cartridge container 120 including the first adsorbent 110 and the second adsorbent 210 , air insulation can be achieved, thereby reducing heat loss.

[0091] (Implementation Method 2)

[0092] In the first embodiment described above, fans are arranged outside of the first inlet valve 141 and outside of the second inlet valve 241 to create an airflow that draws outside air, the target air, into the carbon dioxide recovery device 1. In this embodiment, fans can also be arranged outside of the first outlet 114 and the second outlet 214 to create an airflow that releases the outside air drawn into the carbon dioxide recovery device 1 to the outside. Even with this configuration, the same effects as in the first embodiment can be achieved.

[0093] In addition, the present disclosure is not limited to the above-described embodiment, and can be appropriately modified within a scope not departing from the gist of the present disclosure.

[0094] The present disclosure can also be realized by making each process related to the carbon dioxide recovery method a computer program (for example, a carbon dioxide recovery program) and causing the computer to execute the program.

[0095] In the above embodiment, the control unit 400 is configured as a computer system including a personal computer or a word processor. However, the present invention is not limited thereto, and the computer may also be configured as a server on a LAN, a host computer (personal computer) for communication, or a computer system connected to the Internet. Furthermore, it is also possible to disperse the functions of various devices on the network and configure the computer using the entire network.

[0096] Figure 7 This is a block diagram illustrating the control unit 400 including a computer in the carbon dioxide recovery device 1 according to the first and second embodiments. Figure 7 As shown, the control unit 400 may also include a processor PRC, a memory MMR, a storage device STR, and a user interface UI. The storage device STR stores the processing executed by the control unit 400 as a program. In addition, the processor PRC reads the program from the storage device STR into the memory MMR and executes the program. In this way, the processor PRC realizes the functions of the control unit 400. The user interface UI may also include input devices such as a keyboard, mouse, and camera, as well as output devices such as a display, printer, and speaker.

[0097] The control unit 400 can also be implemented using dedicated hardware. In addition, part or all of the control unit 400 can also be implemented by general or dedicated circuits (Circuitry), processors PRC, etc., or a combination thereof. They can be composed of a single chip or a plurality of chips connected via a bus. Part or all of the control unit 400 can also be implemented by a combination of the circuits described above and a program. In addition, as the processor PRC, a CPU (Central Processing Unit), a GPU (Graphics Processing Unit), an FPGA (Field-programmable Gate Array), a quantum processor (quantum computer control chip), etc. can be used.

[0098] Furthermore, when part or all of the control unit 400 is implemented using multiple information processing devices or circuits, the multiple information processing devices or circuits may be centrally or dispersedly configured. For example, the information processing devices or circuits may be implemented using a client-server system, a cloud computing system, or the like, where they are connected via a communication network. Furthermore, the functions of the control unit 400 may be provided in a SaaS (Software as a Service) format.

[0099] The following carbon dioxide recovery method and carbon dioxide recovery program are also included in the scope of the technical concept of this embodiment.

[0100] (Note 1)

[0101] A carbon dioxide recovery method using a carbon dioxide recovery device, wherein the carbon dioxide recovery device comprises:

[0102] A first device including a first adsorbent material that adsorbs at least a portion of carbon dioxide contained in external air to be treated;

[0103] a second device comprising a second adsorbent material that adsorbs at least a portion of the carbon dioxide contained in the external air;

[0104] an exhaust passage connecting the first device and the second device,

[0105] The carbon dioxide recovery method comprises:

[0106] a first adsorption step of passing the external air through the first device so that at least a portion of the carbon dioxide is adsorbed by the first adsorption material;

[0107] In the first cooling step, the outside air is passed through the second device via the exhaust duct so that the outside air that has passed through the first device in the first adsorption step cools the second adsorbent.

[0108] (Note 2)

[0109] In the carbon dioxide recovery method described in Supplementary Note 1,

[0110] The first adsorbent and the second adsorbent are arranged inside a cylindrical container.

[0111] The first device has one or more of the cartridge containers containing the first adsorbent material,

[0112] said second device having one or more said cartridge containers containing said second adsorbent material,

[0113] In the first adsorption step,

[0114] The outside air passing through the interior of the cartridge container adsorbs at least a portion of the carbon dioxide.

[0115] The outside air passing through the outer periphery of the cartridge container cools the second adsorbent.

[0116] (Note 3)

[0117] In the carbon dioxide recovery method described in Supplementary Note 1,

[0118] The carbon dioxide recovery device also has:

[0119] a plurality of on-off valves, the plurality of on-off valves being provided on the first device, the second device, and the exhaust passage;

[0120] a control unit that switches from the first state to the second state by controlling the plurality of on-off valves, the temperature increase of the first adsorbent material, and the temperature increase of the second adsorbent material;

[0121] The carbon dioxide recovery method further includes a first switching step, wherein the first switching step is a step of switching from the first step to the second step by controlling the plurality of on-off valves and the temperature increase.

[0122] The first step includes the first adsorption step and the first cooling step,

[0123] The second step includes:

[0124] a first temperature raising step of raising the temperature of the first adsorption material;

[0125] The first desorption step desorbs the carbon dioxide from the first adsorbent and releases it to the outside.

[0126] (Note 4)

[0127] In the carbon dioxide recovery method described in Supplementary Note 1,

[0128] The carbon dioxide recovery device also has:

[0129] a plurality of on-off valves, the plurality of on-off valves being provided on the first device, the second device, and the exhaust passage;

[0130] a control unit that controls the plurality of on-off valves, the temperature increase of the first adsorbent material, and the temperature increase of the second adsorbent material;

[0131] The carbon dioxide recovery method further includes a switching step, wherein the switching step is a step of switching between the first step and the third step by controlling the plurality of on-off valves and the temperature increase.

[0132] The first step includes the first adsorption step and the first cooling step,

[0133] The third step includes:

[0134] a second adsorption step of passing the external air through the second device so that at least a portion of the carbon dioxide is adsorbed by the second adsorbent;

[0135] In the second cooling step, the outside air is passed through the first device via the exhaust duct so that the outside air that has passed through the second device in the second adsorption step cools the first adsorbent.

[0136] (Note 5)

[0137] The carbon dioxide recovery method according to Supplementary Note 4 further comprises:

[0138] A first switching process, switching from the first process to the second process;

[0139] a second switching step, switching from the second step to the third step;

[0140] A third switching process, switching from the third process to the fourth process;

[0141] A fourth switching step is to switch from the fourth step to the first step,

[0142] The second step includes:

[0143] a first temperature raising step of raising the temperature of the first adsorption material;

[0144] The first desorption step is to desorb the carbon dioxide from the first adsorbent and release it to the outside.

[0145] The fourth step includes:

[0146] a second temperature raising step of raising the temperature of the second adsorbent material;

[0147] The second desorption step desorbs the carbon dioxide from the second adsorbent and releases it to the outside.

[0148] (Note 6)

[0149] A carbon dioxide recovery program product, comprising a carbon dioxide recovery program, wherein the carbon dioxide recovery program is a carbon dioxide recovery program using a carbon dioxide recovery device, wherein:

[0150] The carbon dioxide recovery device comprises:

[0151] A first device including a first adsorbent material that adsorbs at least a portion of carbon dioxide contained in external air to be treated;

[0152] a second device comprising a second adsorbent material that adsorbs at least a portion of the carbon dioxide contained in the external air;

[0153] an exhaust passage connecting the first device and the second device;

[0154] a plurality of on-off valves, the plurality of on-off valves being provided on the first device, the second device, and the exhaust passage;

[0155] a control unit that controls the plurality of on-off valves, the temperature increase of the first adsorbent material, and the temperature increase of the second adsorbent material;

[0156] The carbon dioxide recovery program causes the computer to execute the following steps, namely:

[0157] a first adsorption step of passing the external air through the first device so that at least a portion of the carbon dioxide is adsorbed by the first adsorption material;

[0158] In the first cooling step, the outside air is passed through the second device via the exhaust duct so that the outside air that has passed through the first device in the first adsorption step cools the second adsorbent.

[0159] (Note 7)

[0160] Among the carbon dioxide recovery process products described in Appendix 6,

[0161] The first adsorbent and the second adsorbent are arranged inside a cylindrical container.

[0162] The first device has one or more of the cartridge containers containing the first adsorbent material,

[0163] said second device having one or more said cartridge containers containing said second adsorbent material,

[0164] In the first adsorption step,

[0165] The outside air passing through the interior of the cartridge container adsorbs at least a portion of the carbon dioxide.

[0166] In the first cooling step,

[0167] The outside air passing through the outer periphery of the cartridge container cools the second adsorbent.

[0168] (Note 8)

[0169] Among the carbon dioxide recovery process products described in Appendix 6,

[0170] further causing the computer to execute a first switching step, the first switching step being a step of switching from the first step to the second step by controlling the plurality of the on-off valves and the temperature increase,

[0171] The first step includes the first adsorption step and the first cooling step,

[0172] The second step includes:

[0173] a first temperature raising step of raising the temperature of the first adsorption material;

[0174] The first desorption step desorbs the carbon dioxide from the first adsorbent and releases it to the outside.

[0175] (Note 9)

[0176] Among the carbon dioxide recovery process products described in Appendix 6,

[0177] A switching step is further executed, wherein the switching step is a step of switching between the first step and the third step by controlling the plurality of the on-off valves and the temperature increase.

[0178] The first step includes the first adsorption step and the first cooling step,

[0179] The third step includes:

[0180] a second adsorption step of passing the external air through the second device so that at least a portion of the carbon dioxide is adsorbed by the second adsorption material;

[0181] In the second cooling step, the outside air is passed through the first device via the exhaust duct so that the outside air that has passed through the second device in the second adsorption step cools the first adsorbent.

[0182] (Note 10)

[0183] The carbon dioxide recovery program product described in Supplementary Note 9 further causes a computer to execute the following steps, namely:

[0184] A first switching process, switching from the first process to the second process;

[0185] a second switching step, switching from the second step to the third step;

[0186] A third switching process, switching from the third process to the fourth process;

[0187] A fourth switching step is to switch from the fourth step to the first step,

[0188] The second step includes:

[0189] a first temperature raising step of raising the temperature of the first adsorption material;

[0190] The first desorption step is to desorb the carbon dioxide from the first adsorbent and release it to the outside.

[0191] The fourth step includes:

[0192] a second temperature raising step of raising the temperature of the second adsorbent material;

[0193] The second desorption step desorbs the carbon dioxide from the second adsorbent and releases it to the outside.

[0194] In the above examples, the program can be stored and provided to the computer using various types of non-transitory computer readable media. Non-transitory computer readable media include various types of tangible storage media. Examples of non-transitory computer readable media include magnetic recording media (such as floppy disks, magnetic tapes, hard disk drives, etc.), magneto-optical recording media (such as magneto-optical disks), CD-ROM (Compact Disc Read Only Memory), CD-R (Compact Disc Recoradable), CD-R / W (Compact Disc Rewritable), semiconductor memory (for example, including mask ROM, PROM (Programmable ROM), EPROM (Erasable PROM), flash ROM, RAM (random access memory)). In addition, the program can also be provided to the computer via various types of temporary computer readable media. Examples of temporary computer readable media include electrical signals, optical signals, and electromagnetic waves. Transitory computer readable media can provide the program to a computer via a wired communication line such as electric wires and optical fibers, or a wireless communication line.

[0195] It is clear from the disclosure thus described that the disclosed embodiments can be modified in various ways. It is obvious that such modifications should not be regarded as departing from the spirit and scope of the present invention, and for those skilled in the art, all such modifications should be included in the appended claims.

Claims

1. A carbon dioxide recovery device comprising: A first device including a first adsorbent material that adsorbs at least a portion of carbon dioxide contained in external air to be treated; a second device comprising a second adsorbent material that adsorbs at least a portion of the carbon dioxide contained in the external air; an exhaust passage connecting the first device and the second device, The outside air that has passed through the first device so that at least a portion of the carbon dioxide is adsorbed by the first adsorbent passes through the second device via the exhaust passage so as to cool the second adsorbent.

2. The carbon dioxide recovery device according to claim 1, wherein: The first adsorbent and the second adsorbent are arranged inside a cylindrical container. The first device has one or more of the cartridge containers containing the first adsorbent material, said second device having one or more said cartridge containers containing said second adsorbent material, The outside air passing through the interior of the cartridge container adsorbs at least a portion of the carbon dioxide. The outside air passing through the outer periphery of the cartridge container cools the second adsorbent.

3. The carbon dioxide recovery device according to claim 2, wherein: The first device comprises: a first inlet for allowing the outside air to flow in from the interior of the cartridge container; a first exhaust port for exhausting the external air that has passed through the interior of the cartridge container; a first introduction port for introducing the external air to pass through the outer periphery of the cartridge container; a first discharge port for discharging the external air that has passed through the outer periphery of the cartridge container; The second device includes: a second inlet for allowing the outside air to flow in from the interior of the cartridge container; a second exhaust port for exhausting the external air that has passed through the interior of the cartridge container; a second introduction port for introducing the external air to pass through the outer periphery of the cartridge container, The second discharge port discharges the external air that has passed through the outer periphery of the cartridge container.

4. The carbon dioxide recovery device according to claim 1, wherein: Also features: a plurality of on-off valves, the plurality of on-off valves being provided on the first device, the second device, and the exhaust passage; a control unit that switches from the first state to the second state by controlling the plurality of on-off valves, the temperature increase of the first adsorbent material, and the temperature increase of the second adsorbent material; In the first state, The outside air that has passed through the first device so that at least a portion of the carbon dioxide is adsorbed by the first adsorbent passes through the second device via the exhaust passage so as to cool the second adsorbent. In the second state, The temperature of the first adsorbent is increased to desorb the carbon dioxide from the first adsorbent and release it to the outside.

5. The carbon dioxide recovery device according to claim 1, wherein: Also features: a plurality of on-off valves, the plurality of on-off valves being provided on the first device, the second device, and the exhaust passage; a control unit that switches between the first state and the third state by controlling the plurality of on-off valves, the temperature increase of the first adsorbent material, and the temperature increase of the second adsorbent material; In the first state, The outside air that has passed through the first device so that at least a portion of the carbon dioxide is adsorbed by the first adsorbent passes through the second device via the exhaust passage so as to cool the second adsorbent. In the third state, The outside air having passed through the second device so that at least a portion of the carbon dioxide is adsorbed by the second adsorbent passes through the first device via the exhaust passage so as to cool the first adsorbent.

6. The carbon dioxide recovery device according to claim 5, wherein: The control unit switches to the third state after switching from the first state to the second state, and After switching from the third state to the fourth state, switching to the first state, In the second state, raising the temperature of the first adsorbent material so that the carbon dioxide is desorbed from the first adsorbent material and released to the outside, In the fourth state, The second adsorbent is heated to desorb the carbon dioxide from the second adsorbent and release it to the outside.

7. The carbon dioxide recovery device according to claim 5, wherein: The exhaust passage comprises: a first exhaust passage for allowing the external air to flow from the first device to the second device; a second exhaust passage that allows the external air to flow from the second device to the first device, The first exhaust passage and the second exhaust passage include portions that communicate with the first device and the second device from different directions.

8. The carbon dioxide recovery device according to claim 7, wherein: The first device comprises: a first inlet for allowing the external air to flow in; a first exhaust port for exhausting the external air flowing in from the first inlet; a first introduction port for introducing the external air exhausted from the second device; a first discharge port for discharging the external air introduced from the first inlet to the outside; The second device includes: a second inlet for allowing the external air to flow in; a second exhaust port for exhausting the external air flowing in from the second inlet; a second introduction port for introducing the external air exhausted from the first device; a second discharge port for discharging the external air introduced from the second inlet to the outside, The exhaust passage comprises: a shared space disposed between the first device and the second device; a first discharge space disposed between the common space and the first discharge port; a first introduction space, which is arranged between the common space and the first introduction port; a second discharge space disposed between the common space and the second discharge outlet; a second introduction space disposed between the common space and the second introduction port; The plurality of on-off valves include: a first inflow valve, which opens and closes the first inlet; a first discharge valve, which opens and closes between the common space and the first discharge space; a first introduction valve, which opens and closes the common space and the first introduction space; a second inlet valve, which opens and closes the second inlet; a second discharge valve, which opens and closes between the common space and the second discharge space; a second introduction valve, which opens and closes the common space and the second introduction space; The first discharge valve, the first introduction valve, the second discharge valve, and the second introduction valve are provided on the exhaust passage. The first exhaust passage includes the first exhaust space, the common space, and the second introduction space, which are connected to each other. The second exhaust passage includes the second exhaust space, the common space, and the first introduction space that are connected to each other.

9. The carbon dioxide recovery device according to claim 8, wherein: Also includes: a first desorption valve that opens and closes the first discharge space and the outside; The second desorption valve opens and closes the second discharge space and the outside.

10. The carbon dioxide recovery device according to claim 7, wherein: A discharge port for discharging the external air to the outside is arranged on the opposite side of the inlet communicating with the first exhaust passage in the second device. An inlet for allowing the external air to flow in from the outside is arranged on the opposite side of the exhaust port communicating with the second exhaust passage in the second device.

11. A carbon dioxide recovery method using a carbon dioxide recovery device, wherein: The carbon dioxide recovery device comprises: A first device including a first adsorbent material that adsorbs at least a portion of carbon dioxide contained in external air to be treated; a second device comprising a second adsorbent material that adsorbs at least a portion of the carbon dioxide contained in the external air; an exhaust passage connecting the first device and the second device, The carbon dioxide recovery method comprises: a first adsorption step of passing the external air through the first device so that at least a portion of the carbon dioxide is adsorbed by the first adsorption material; In the first cooling step, the outside air is passed through the second device via the exhaust duct so that the outside air that has passed through the first device in the first adsorption step cools the second adsorbent.

12. A carbon dioxide recovery program product, comprising a carbon dioxide recovery program, wherein the carbon dioxide recovery program is a carbon dioxide recovery program using a carbon dioxide recovery device, wherein: The carbon dioxide recovery device comprises: A first device including a first adsorbent material that adsorbs at least a portion of carbon dioxide contained in external air to be treated; a second device comprising a second adsorbent material that adsorbs at least a portion of the carbon dioxide contained in the external air; an exhaust passage connecting the first device and the second device; a plurality of on-off valves, the plurality of on-off valves being provided on the first device, the second device, and the exhaust passage; a control unit that controls the plurality of on-off valves, the temperature increase of the first adsorbent material, and the temperature increase of the second adsorbent material; The carbon dioxide recovery program causes the computer to execute the following steps, namely: a first adsorption step of passing the external air through the first device so that at least a portion of the carbon dioxide is adsorbed by the first adsorption material; In the first cooling step, the outside air is passed through the second device via the exhaust duct so that the outside air that has passed through the first device in the first adsorption step cools the second adsorbent.

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