Carbon dioxide recovery device

Abstract

To provide a carbon dioxide recovery technique with excellent energy efficiency.SOLUTION: A carbon dioxide recovery device includes a first adsorbent capable of adsorbing moisture contained in gas introduced into a processing tank, or desorbing the adsorbed moisture, and a second adsorbent disposed on the downstream side of the first adsorbent and capable of adsorbing carbon dioxide contained in the gas, or desorbing the adsorbed carbon dioxide. The second adsorbent desorbs the carbon dioxide by being heated using a temperature of the moisture desorbed from the first adsorbent as a heating source, or by being humidified using humidity of the moisture as a humidifying source.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The disclosed technology relates to a carbon dioxide capture device. [Background technology]

[0002] Patent Document 1 discloses a system and method for recovering carbon dioxide desorbed from a carbon dioxide adsorbent by bringing the carbon dioxide adsorbent that has adsorbed carbon dioxide into contact with desorption steam. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 7123749 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the technology of Patent Document 1 requires a certain amount of water to operate the steam generator that generates the desorption steam, which makes it necessary to replenish a considerable amount of water from an external infrastructure from the initial stage of operating the system.

[0005] When the system is used in places where water resources are scarce, it may be possible to reduce water consumption by reusing the condensed steam in a subsequent process. However, in order to convert all of the steam required for the desorption process back into water, the temperature must be below 0°C, which may increase energy consumption.

[0006] Furthermore, even if the condensed water is reused, the amount of steam required may increase as the amount of gas to be treated increases, which may increase the power required to transport the condensed water back from the condenser to the steam generator, resulting in increased energy consumption.

[0007] In view of the above-mentioned problems, the disclosed technology aims to provide a carbon dioxide capture technology with excellent energy efficiency. One aspect of the present invention provides a technology that contributes to the improvement and development of a sustainable environment. [Means for solving the problem]

[0008] A carbon dioxide recovery apparatus according to one aspect of the present invention includes: a first adsorbent capable of adsorbing moisture contained in a gas introduced into a treatment tank or desorbing the adsorbed moisture; a second adsorbent disposed downstream of the first adsorbent and capable of adsorbing carbon dioxide contained in the gas or desorbing the adsorbed carbon dioxide; The second adsorbent is heated using the temperature of the moisture desorbed from the first adsorbent as a heating source, or is humidified using the humidity of the moisture as a humidification source, thereby desorbing the carbon dioxide. [Effects of the Invention]

[0009] According to the present invention, it is possible to provide a carbon dioxide recovery technology that is excellent in energy efficiency. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a diagram showing an example of the configuration of a carbon dioxide capture device according to a first embodiment. [Figure 2] 10A and 10B are diagrams for explaining the adsorption mechanism when the first holding part RT1 rotates. [Figure 3] 10A and 10B are diagrams for explaining the adsorption mechanism when the first holding part RT1 rotates. [Figure 4] 10A and 10B are diagrams for explaining the adsorption mechanism when the first holding part RT1 is not rotated. [Figure 5] FIG. 10 is a diagram for explaining an example of an area used in purging. [Figure 6] FIG. 10 is a diagram showing an example of the configuration of an apparatus using a target area for purging. [Figure 7] FIG. 10 is a diagram showing an example of the configuration of a carbon dioxide capture device according to a second embodiment. [Figure 8]FIG. 2 is a control block diagram of the carbon dioxide capture device according to the first and second embodiments. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, the embodiments will be described in detail with reference to the accompanying drawings. Note that the following embodiments do not limit the scope of the invention as claimed, and not all combinations of features described in the embodiments are necessarily essential to the invention. Two or more of the features described in the embodiments may be arbitrarily combined. Furthermore, the same reference numerals are used for the same or similar components, and redundant explanations will be omitted.

[0012] [Embodiment 1] FIG. 1 is a diagram showing an example of the configuration of a carbon dioxide capture device according to the first embodiment. The carbon dioxide capture device has, as a component, retention units RT (RT1, RT2) that retain an adsorbent / desorbent. In the example of the configuration of the carbon dioxide capture device shown in FIG. 1, the retention unit RT is shown to have a first retention unit RT1 and a second retention unit RT2. The first retention unit RT1 and the second retention unit RT2 are each rotatably supported, and the first retention unit RT1 and the second retention unit RT2 can rotate when rotational power is transmitted from drive sources DS1 and DS2 (FIG. 8) such as motors.

[0013] As shown in Fig. 1, the first holding unit RT1 and the second holding unit RT2 have a cylindrical structure, and a power transmission member such as a belt may be wound around the outer periphery to transmit rotational power. The drive sources DS1 and DS2 that rotate the first holding unit RT1 and the second holding unit RT2 can be controlled by a control device 140 (Fig. 8). The rotational speeds of the first holding unit RT1 and the second holding unit RT2 may be controlled to be synchronized. In the following description, the rotatably supported first holding unit RT1 will also be referred to as the first rotor, and the second holding unit RT2 will also be referred to as the second rotor.

[0014] The carbon dioxide capture device may have a first blower 41 that sends out gas 203 to the first holding unit RT1, and a second blower 42 that sends out gas 102 to the first holding unit RT1. Here, the second blower 42 sends the input gas 101 as gas 102 to the first holding unit RT1.

[0015] The carbon dioxide capture device has a heating unit 50 (heat source) that heats input gas 201 and sends the resulting gas 202 (heated gas) to a first blower 41. The first blower 41 sends the gas 202 (heated gas) input from the heating unit 50 to a first holding unit RT1 as gas 203 (heated gas). The carbon dioxide capture device also has a condenser 70 (condenser) that removes moisture 300 from gas 205 output from the second holding unit RT2, and the condenser 70 outputs gas 206 (dehumidified gas) from which the moisture 300 has been removed.

[0016] The first holding unit RT1 and the second holding unit RT2 are divided into upper and lower sections by the member 69 in the z direction. The gases 201-206 shown in FIG. 1 may be configured to flow through a ventilation pipe (not shown) provided above the member 69. The gases 101-104 may be configured to flow through a ventilation pipe (not shown) provided below the member 69. The first blower 41 is disposed on the member 69, and the second blower 42 is disposed on a member 79 provided below the member 69. The arrangement shown in FIG. 1 is merely illustrative, and the arrangement may be reversed. That is, the components provided below the member 69 shown in FIG. 1 may be disposed above the member 69, and the components provided above the member 69 may be disposed below the member 69.

[0017] (Configuration of holding part RT) The first holding portion RT1 and the second holding portion RT2 have a hollow cylindrical structure, and a moisture adsorbent that adsorbs moisture is held inside the first holding portion RT1, and a carbon dioxide adsorbent (CO2 adsorbent) that adsorbs carbon dioxide is held inside the second holding portion RT2.

[0018] The cylindrical structures of the first holding part RT1 and the second holding part RT2 are open on the yz plane, allowing gas to flow in the x direction of the paper. The left side of the paper is the upstream side, and the right side is the downstream side, with the gas flowing from upstream to downstream.

[0019] The moisture adsorbent held in the first holding unit RT1 is a material capable of adsorbing moisture from gas. The moisture adsorbent has the property of easily adsorbing moisture contained in gas at room temperature without cooling or heating, and easily desorbing the adsorbed moisture when heated. Examples of moisture adsorbents that can be used include silica gel, zeolite, metal organic frameworks (MOFs), covalent organic frameworks (COFs), and activated carbon, and it is sufficient for the material to contain at least one of these.

[0020] The carbon dioxide adsorbent held in the second holding unit RT2 is a material capable of adsorbing and desorbing carbon dioxide. The carbon dioxide adsorbent may have the property of easily adsorbing carbon dioxide contained in gas when the gas is dehumidified, and easily desorbing the adsorbed carbon dioxide when the gas is humidified to a predetermined humidity (for example, a relative humidity of 20% or more). Alternatively, the carbon dioxide adsorbent may have the property of easily adsorbing carbon dioxide contained in gas at room temperature without cooling or heating, and easily desorbing the adsorbed carbon dioxide when the gas is heated. For example, the carbon dioxide adsorbent may be made of an amine-based material, a polymer material, an inorganic material, or the like, and may contain at least one of these.

[0021] The moisture adsorbent is held by the first holding unit RT1, and the carbon dioxide adsorbent is held by the second holding unit RT2, with the two held without direct contact. The moisture adsorbent and the carbon dioxide adsorbent only need to be held in gas-solid or gas-liquid contact so that gas can flow through them, and may be held inside the first holding unit RT1 and the second holding unit RT2 in a solid state or a liquid state, respectively.

[0022] The moisture adsorbent and the carbon dioxide adsorbent may be supported on a substrate and held in the first holding unit RT1 and the second holding unit RT2, respectively. The substrate can be, for example, a porous body made of metal with continuous pores (porous metal body). A porous metal body is a solid substance or structure containing a large number of pores, and pores refer to gaps present inside a material. The pores inside the porous metal body are distributed in three dimensions and are connected to each other. Therefore, the porous metal body is breathable despite being a metal substance. Alternatively, a membrane filter, granular silica, or the like can be used as the substrate. The substrate may include at least one of a porous body, a membrane filter, and granular silica.

[0023] 2 and 3 are diagrams illustrating the adsorption mechanism when the first holding unit RT1 (first rotor) rotates. 401 indicates the upstream side of the first holding unit RT1, and 402 indicates the downstream side of the first holding unit RT1. The rotation of the first holding unit RT1 (first rotor) switches between an area where moisture is adsorbed by the moisture adsorbent and an area where moisture is desorbed. Gas 110 indicates the process gas input into the first holding unit RT1 during the adsorption process. Gas 110 may be, for example, a gas containing carbon dioxide and humidified to a predetermined humidity. Gas 210 indicates the heated gas input into the first holding unit RT1 during the desorption process, and may be the gas used in the adsorption process or a gas obtained by heating a purge gas such as a pure gas. The adsorption mechanism is similar when the second holding unit RT2 (second rotor) rotates, and the rotation of the second holding unit RT2 switches between an area where the carbon dioxide adsorbent adsorbs carbon dioxide and an area where the carbon dioxide is desorbed.

[0024] FIG. 3 shows the adsorbent held in the first holding unit RT1 (first rotor) as viewed from the front (yz plane). Reference numerals 450 and 460 indicate the rotation direction of the first holding unit RT1. When gas 110 (gas to be treated) is passed through the adsorbent, adsorption of the target component begins from the upstream side of the adsorbent, and adsorption progresses throughout the upstream surface of the first holding unit RT1 (FIG. 3(a)). On the other hand, differences in the amount of adsorption occur on the downstream surface of the first holding unit RT1, and regions with different adsorption amounts may coexist, such as a region where adsorption of the target component has not progressed (not yet) and a region where adsorption has progressed and reached saturation (completed) (FIG. 3(b)). When adsorption progresses throughout the downstream side of the first holding unit RT1 and reaches saturation, the target component's airborne concentration downstream is discharged at the same airborne concentration as the upstream side.

[0025] Fig. 4 is a diagram illustrating the adsorption mechanism when the first holding unit RT1 (first rotor) is not rotated. Fig. 4 shows the adsorbent held in the first holding unit RT1 (first rotor) as viewed from the side (xz plane). Gas 110 (process gas) is input to the upstream side 401 of the first holding unit RT1 and output from the downstream side 402 of the first holding unit RT1.

[0026] At time t=0 before the gas 110 (gas to be treated) is input into the first holding unit RT1 (first rotor), the adsorbent is in a region (unadsorbed) where the adsorption of the target component has not progressed as a whole. However, as the adsorption progresses over time (t=t n , t z ), adsorption progresses overall and reaches saturation. When the gas to be treated is passed continuously through the fixed type as shown in Figure 4, it may be necessary to switch between treatments using at least two treatment tanks, one for adsorption treatment and one for desorption treatment.

[0027] In the rotary system shown in Figures 2 and 3, a region that has become saturated through adsorption processing becomes a target region for desorption processing through rotation, and becomes an unsaturated region through heating and regeneration. A region that has become unsaturated through desorption processing can also become a target region for adsorption processing through rotation. In the rotary system shown in Figures 2 and 3, rotation can alternate between an unsaturated region that can adsorb the target substance and a saturated region that can desorb and adsorb the adsorbed substance, making it possible to stably adsorb and desorb the target substance.

[0028] When using the first holding part RT1 (first rotor) or the second holding part RT2 (second rotor), for example, as shown in FIG. 5, an area 508 used for purging may be provided between the areas used for adsorption processing (501-504) and the areas used for desorption processing (505-507).

[0029] Generally, in adsorption treatment, a treatment gas at, for example, room temperature flows through the first rotor and the second rotor, and in desorption treatment, a high-temperature gas at, for example, 100°C or higher flows through the first rotor and the second rotor. If there is no region 508 used for purging as shown in Figure 5, the first rotor and the second rotor immediately after the start of the adsorption treatment will have been heated to a high temperature by the desorption treatment, and will have low adsorption performance even when a treatment gas at room temperature is passed through them, which may reduce the adsorption efficiency for adsorbing the target substance.

[0030] When the area 508 used for purging is provided, even if the desorbed target substance remains in the first rotor and the second rotor, it is possible to input a purge gas into the area 508 used for purging to purge the remaining target substance, thereby further increasing the recovery rate.

[0031] FIG. 6 is a diagram showing an example of the configuration of an apparatus using a target area for purging. In the example of FIG. 6, the first holding unit RT1 (first rotor) is shown as an example, but a similar configuration example can also be applied to the second holding unit RT2 (second rotor). In FIG. 6, 650 illustrates an example of a target area for adsorption processing, and 670 illustrates an example of a target area for desorption processing. 660 illustrates an example of a target area for purging. The target area for purging 660 is provided between the target area for adsorption processing 650 and the target area for desorption processing 670.

[0032] Reference numeral 602 denotes a gas to be treated that is the target of adsorption treatment, and gas 602 (gas to be treated) sent out by second blower 42 is input to a target area 650 for adsorption treatment in first holding unit RT1 (first rotor). Then, gas 603 (dehumidified gas) in which the target substance to be adsorbed (moisture) is adsorbed is output. The output gas 603 (dehumidified gas) is input to second holding unit RT2 (second rotor).

[0033] Reference numeral 610 denotes a purge gas, and the purge gas 610 is input into a purge target area 660. When the purge gas 610 is input, desorption of the substance (moisture) to be desorbed remaining in the purge target area 660 is promoted, and a highly humid gas 611 is output. The highly humid gas 611 is input into the heating unit 50 and heated to a predetermined temperature. The heated gas 611 (heated gas) is sent out by the first blower 41, and the gas 612 (heated gas) sent out by the first blower 41 is input into a desorption processing target area 670 in the first holding unit RT1 (first rotor). Then, a gas 613 (humidified and heated gas) from which the substance (moisture) to be desorbed has been desorbed is output. The output gas 613 (humidified and heated gas) is input into the second holding unit RT2 (second rotor).

[0034] Even if the target substance (moisture) to be desorbed remains in the first rotor, it is possible to purge the remaining substance by inputting a purge gas into the purge target area 660. The addition of the purged moisture further increases the humidity of the gas 613 (humidified / heated gas) used in the carbon dioxide desorption process. This makes it possible to improve the recovery efficiency in the carbon dioxide desorption process.

[0035] (Explanation of adsorption treatment) 1, the flow of the adsorption process in the carbon dioxide capture device will be described. Gas 101 contains carbon dioxide and is humidified to a predetermined humidity. Second blower 42 outputs input gas 101 as gas 102 to first holder RT1 (first rotor).

[0036] As gas 102 passes through the moisture adsorbent held by first holding unit RT1, the moisture adsorbent adsorbs moisture contained in gas 102. Gas 103 with the moisture adsorbed therein (dehumidified gas) is output from first holding unit RT1 and input to second holding unit RT2.

[0037] As gas 103 (dehumidified gas) passes through the carbon dioxide adsorbent held in second holding unit RT2, the carbon dioxide adsorbent adsorbs the carbon dioxide contained in gas 103 (dehumidified gas). Gas 104, in which carbon dioxide has been adsorbed by the carbon dioxide adsorbent, is output from second holding unit RT2. Here, gas 104 output from second holding unit RT2 is a gas that has been dehumidified by the adsorption of moisture and in which the concentration of carbon dioxide has been reduced by the adsorption of carbon dioxide (dehumidified, low-concentration CO2).

[0038] (Description of desorption process) Next, the flow of the adsorption process in the carbon dioxide capture device will be described. The carbon dioxide adsorbent in the carbon dioxide capture device desorbs carbon dioxide by being heated using the temperature of the moisture desorbed from the moisture adsorbent as a heating source, or by being humidified using the humidity of the moisture desorbed from the moisture adsorbent as a humidification source. The gas 201 supplied in the desorption process may be the gas 101 used in the adsorption process, or may be another gas or a purge gas such as a pure gas. In the following description, the gas 201 supplied in the desorption process may also be referred to as gas 201 (purge gas).

[0039] Gas 201 (purge gas) is input to heating unit 50 before being input to first holding unit RT1. Heating unit 50 heats gas 201 (purge gas) to a desorption temperature at which moisture adsorbed by the moisture adsorbent in first holding unit RT1 can be desorbed, and outputs heated gas 202.

[0040] Gas 202 heated by heating unit 50 is taken in by first blower 41. Gas 202 taken in by first blower 41 is output from first blower 41 as gas 203 (heated gas) and input to first holding unit RT1. Note that instead of using heating unit 50, for example, the periphery of first holding unit RT1 may be heated to heat the moisture adsorbent to the moisture desorption temperature by thermal conduction.

[0041] As gas 203 (heated gas) passes through the moisture adsorbent held by first holding unit RT1, moisture is desorbed from the moisture adsorbent, and the desorbed moisture humidifies gas 203 (heated gas). As the heated gas is humidified, gas 203 (heated gas) becomes gas 204 (humidified heated gas) in a humidified and heated state. Then, gas 204 (humidified heated gas) is output from first holding unit RT1 and input to second holding unit RT2.

[0042] As gas 204 (humidified and heated gas) passes through the carbon dioxide adsorbent held in second holding unit RT2, the carbon dioxide adsorbent desorbs carbon dioxide, and the carbon dioxide concentration of gas 204 (humidified and heated gas) becomes higher than the concentration before passing through the carbon dioxide adsorbent. That is, gas 205 that is humidified, heated, and has a high concentration of carbon dioxide (hereinafter referred to as humidified, heated, high CO2 concentration gas 205) is output from second holding unit RT2.

[0043] Here, if the carbon dioxide adsorbent is an adsorbent (humidity swing) that can adsorb and desorb carbon dioxide in response to changes in the humidity of the gas, the moisture contained in the gas 204 (humidified / heated gas) is used to desorb carbon dioxide.

[0044] Furthermore, if the carbon dioxide adsorbent is an adsorbent (temperature swing) that can adsorb and desorb carbon dioxide in response to changes in gas temperature, the heat of gas 204 (humidified and heated gas) is utilized to desorb carbon dioxide. When gas 205 (humidified, heated, high CO2 concentration gas) passes through condenser 70, moisture 300 contained in gas 205 is condensed, and the carbon dioxide concentration in gas 206 output from condenser 70 becomes even higher. The technology disclosed in embodiment 1 can provide a carbon dioxide capture technology with excellent energy efficiency.

[0045] [Embodiment 2] FIG. 7 is a diagram showing an example of the configuration of a carbon dioxide capture device according to a second embodiment. In the carbon dioxide capture device described in FIG. 1, the first rotor and the second rotor are arranged in a single treatment tank, and adsorption and desorption processes are performed while the first rotor and the second rotor are rotated. This configuration is not limited to this, and the first rotor or the second rotor may be arranged in a separate treatment tank. Here, the treatment tank is a component that defines an internal space separated from the external space. The treatment tank may have a sealed structure to maintain a constant treatment environment. When the above configuration is arranged in separate treatment tanks, for example, the separate treatment tanks may be connected by a ventilation pipe, and the moisture adsorption / desorption process and the carbon dioxide adsorption / desorption process may be divided between the separate treatment tanks, or the processes may be configured to be performed in parallel.

[0046] 7(a), 210 and 220 are treatment tanks that perform moisture adsorption treatment and carbon dioxide adsorption treatment, respectively, and 310 and 320 are treatment tanks that perform moisture desorption treatment and carbon dioxide desorption treatment, respectively. The blower 410 sends the input gas 101 as gas 501 to the treatment tank 210.

[0047] As gas 501 passes through the moisture adsorbent held in treatment tank 210, the moisture adsorbent adsorbs moisture contained in gas 501. Gas 503 with the moisture adsorbed therein is output from treatment tank 210 and input into treatment tank 220. As gas 503 passes through the carbon dioxide adsorbent held in treatment tank 220, the carbon dioxide adsorbent adsorbs carbon dioxide contained in gas 503, and gas 505 with carbon dioxide adsorbed therein is output from treatment tank 220.

[0048] Gas 701 (heated gas) heated by heating unit 50 is input into treatment tank 310. As gas 701 (heated gas) passes through a moisture adsorbent held in treatment tank 310, moisture adsorbed to the moisture adsorbent is desorbed, and humidified gas 502 (humidified and heated gas) is output from treatment tank 310 and input into treatment tank 320. As gas 502 (humidified and heated gas) passes through a carbon dioxide adsorbent held in treatment tank 320, carbon dioxide adsorbed to the carbon dioxide adsorbent is desorbed, and gas 504 with an increased concentration of carbon dioxide (humidified, heated, high CO2 concentration gas) is output from treatment tank 320.

[0049] Gas 504 output from treatment tank 320 enters blower 420, and gas 506 sent out by blower 420 enters condenser 70. When gas 506 passes through condenser 70, moisture 518 contained in gas 506 is condensed, and the concentration of carbon dioxide in gas 506 becomes even higher.

[0050] The first concentration sensor 80 is a sensor that detects the concentration of carbon dioxide contained in the gas 101 before it is introduced into the treatment tank 210, and the second concentration sensor 90 is a sensor that detects the concentration of carbon dioxide contained in the gases 505, 504 after treatment inside the treatment tanks 220, 320. The first humidity sensor 85A is a sensor that detects the humidity of the water contained in the gas 503, and the second humidity sensor 85B is a sensor that detects the humidity of the water contained in the gas 502. The detection results by the first concentration sensor 80 and the second concentration sensor 90 and the detection results by the first humidity sensor 85A and the second humidity sensor 85B are input to the control device 140 (FIG. 8).

[0051] During the adsorption process in the treatment tanks 210, 220, when the difference between the detection results by the first concentration sensor 80 and the second concentration sensor 90 becomes equal to or greater than a certain value, it is determined that the carbon dioxide adsorption process has ended, and as shown in Figure 7(b), the process in the treatment tanks 210, 220 is switched from adsorption process to desorption process, and the process in the treatment tanks 310, 320 is switched from desorption process to adsorption process.

[0052] 7(b), blower 410 sends input gas 101 as gas 501 to treatment tank 310. As gas 501 passes through a moisture adsorbent held in treatment tank 310, the moisture adsorbent adsorbs moisture contained in gas 501. Gas 502 with the moisture adsorbed therein is output from treatment tank 310 and input into treatment tank 320. As gas 502 passes through a carbon dioxide adsorbent held in treatment tank 320, the carbon dioxide adsorbent adsorbs carbon dioxide contained in gas 502, and gas 504 with carbon dioxide adsorbed therein is output from treatment tank 320.

[0053] Gas 701 (heated gas) heated by heating unit 50 is input into treatment tank 210. When gas 701 (heated gas) passes through a moisture adsorbent held in treatment tank 210, the moisture adsorbed to the moisture adsorbent is desorbed, and humidified gas 503 (humidified and heated gas) is output from treatment tank 210 and input into treatment tank 220. When gas 503 (humidified and heated gas) passes through a carbon dioxide adsorbent held in treatment tank 220, the carbon dioxide adsorbed to the carbon dioxide adsorbent is desorbed, and gas 505 with an increased concentration of carbon dioxide (humidified, heated, high CO2 concentration gas) is output from treatment tank 220.

[0054] Gas 505 output from treatment tank 220 enters blower 420, and gas 506 sent out by blower 420 enters condenser 70. When gas 506 passes through condenser 70, moisture 518 contained in gas 506 is condensed, and the concentration of carbon dioxide in gas 506 becomes even higher.

[0055] 8 is a control block diagram of the carbon dioxide capture apparatus according to the first and second embodiments. The control device 140 includes a processing unit 141 (processor), an interface unit 142, and a storage unit 143. The processing unit 141 is a general-purpose integrated circuit for executing operations by the carbon dioxide capture apparatus, and may be configured by, for example, a central processing unit (CPU). The processing unit 141 is capable of executing various processes by reading and executing programs stored in the storage unit 143. The storage unit 143 stores control information corresponding to the adsorption process or the desorption process, and the processing unit 141 may execute the process corresponding to the adsorption process or the desorption process based on the control information.

[0056] The interface unit 142 is an interface for various sensor groups 150 and device groups 160 included in the carbon dioxide capture device, and the processing unit 141 (processor) can control the device group 160 based on information obtained from the sensor group 150 via the interface unit 142.

[0057] Here, the sensor group 150 includes, for example, a first concentration sensor 80, a second concentration sensor 90, a first humidity sensor 85A, and a second humidity sensor 85B. The device group 160 also includes the air blower (41, 42, 410, 420), the condenser 70, and drive sources DS1 and DS2 for driving the first rotor and the second rotor.

[0058] As described above, the technology disclosed in the second embodiment can provide a carbon dioxide capture technology with excellent energy efficiency.

[0059] [Other embodiments] Furthermore, a program for realizing one or more functions described in each embodiment can be supplied to the control device via a network or a storage medium, and one or more processors in the computer of the system or control device can read and execute the program. The present invention can also be realized in such an embodiment.

[0060] The present invention is not limited to the above-described embodiment, and various modifications and variations are possible within the scope of the gist of the present invention. [Explanation of symbols]

[0061] RT1: First holding part (first rotor), RT2: Second holding part (second rotor), 41: First blower section, 42: Second blower section, 50: Heating section, 70: Condenser section

Claims

1. a first adsorbent capable of adsorbing moisture contained in a gas introduced into the treatment tank or desorbing the adsorbed moisture; a second adsorbent disposed downstream of the first adsorbent and capable of adsorbing carbon dioxide contained in the gas or desorbing the adsorbed carbon dioxide; a carbon dioxide recovery apparatus in which the second adsorbent is heated using the temperature of the moisture desorbed from the first adsorbent as a heating source, or humidified using the humidity of the moisture desorbed from the first adsorbent as a humidification source, thereby desorbing the carbon dioxide.

2. 2. The carbon dioxide recovery apparatus according to claim 1, wherein the first adsorbent includes at least one of silica gel, zeolite, metal-organic framework (MOF), covalent organic framework (COF), and activated carbon.

3. 3. The carbon dioxide recovery device according to claim 2, wherein the first adsorbent has a property of adsorbing the moisture contained in the gas at room temperature without cooling or heating, and desorbing the adsorbed moisture when the temperature of the gas is increased by heating.

4. The carbon dioxide recovery device according to claim 1 , wherein the second adsorbent contains one or more of an amine-based material, a polymer material, and an inorganic material.

5. 5. The carbon dioxide recovery device according to claim 4, wherein the second adsorbent has a property of adsorbing the carbon dioxide contained in the gas at room temperature without cooling or heating, and desorbing the adsorbed carbon dioxide when the gas is heated.

6. 5. The carbon dioxide recovery device according to claim 4, wherein the second adsorbent has a property of adsorbing the carbon dioxide contained in the gas when the gas is in a dehumidified state, and desorbing the adsorbed carbon dioxide when the gas is in a humidified state to a predetermined humidity.

7. 5. The carbon dioxide recovery apparatus according to claim 2, wherein the first adsorbent or the second adsorbent is supported inside the treatment tank in a solid state or a liquid state, respectively.

8. the first adsorbent or the second adsorbent is supported inside the treatment tank in a state where it is supported on a substrate; 6. The carbon dioxide recovery device according to claim 2 or 5, wherein the substrate includes at least one of a porous body, a membrane filter, and granular silica.

9. a first concentration sensor for detecting the concentration of carbon dioxide contained in the gas before it is introduced into the treatment tank; The carbon dioxide recovery device according to claim 1 , further comprising: a second concentration sensor that detects the concentration of carbon dioxide contained in the gas treated in the treatment tank.

10. The carbon dioxide capture device according to claim 9, further comprising a control device that switches between an adsorption process for adsorbing the carbon dioxide and a desorption process for desorbing the adsorbed carbon dioxide based on the detection results of the first concentration sensor and the detection results of the second concentration sensor.

11. The carbon dioxide recovery device according to claim 10, further comprising a condenser that cools the gas obtained by the desorption process to remove moisture.

12. The carbon dioxide recovery apparatus according to claim 11, wherein the condenser cools the treated gas by air cooling or by utilizing waste cold energy in the carbon dioxide recovery apparatus.

13. the first adsorbent is held in the treatment tank by a first holding unit that is rotatable by rotational power of a drive source; the second adsorbent is held by a second holding unit that is rotatable by rotational power of the drive source, By rotating the first holding unit, a region where the first adsorbent adsorbs the moisture and a region where the first adsorbent desorbs the moisture are switched, The carbon dioxide recovery device according to claim 1 , wherein the rotation of the second holding section switches between a region where the second adsorbent adsorbs the carbon dioxide and a region where the second adsorbent desorbs the carbon dioxide.

14. The carbon dioxide recovery device according to claim 1 , wherein the first adsorbent and the second adsorbent are supported inside the treatment tank without being in direct contact with each other.

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