Carbon dioxide separation system

Abstract

This carbon dioxide separation system comprises: an adsorption treatment chamber that is supplied with a target gas containing carbon dioxide, causes a granular adsorbent to adsorb the carbon dioxide in the target gas by bringing the target gas into contact with the adsorbent, and discharges the target gas after contact with the adsorbent; a regeneration treatment chamber that causes the carbon dioxide to be released from the adsorbent by bringing steam into contact with the adsorbent after adsorption of the carbon dioxide; and a drying treatment chamber that is supplied with a drying gas, dries the adsorbent by bringing the drying gas into contact with the adsorbent after contact with the steam, and discharges the drying gas after contact with the adsorbent. The target gas discharged from the adsorption treatment chamber is supplied to the drying treatment chamber as the drying gas.

Description

Carbon Dioxide Separation System

[0001] The present disclosure relates to a carbon dioxide separation system for separating carbon dioxide from a target gas containing carbon dioxide such as combustion exhaust gas.

[0002] Conventionally, a system for separating carbon dioxide in a target gas using an adsorbent has been known. For example, Patent Document 1 describes a carbon dioxide separation system including a treatment tower composed of a tower-shaped treatment vessel into which an adsorbent is introduced from the top and discharged from the bottom. In this system, the internal space of the tower-shaped treatment vessel is virtually divided into a regeneration treatment chamber, a drying treatment chamber, and an adsorption treatment chamber from above by a plurality of obstacles that maintain a laminar flow of the adsorbent while preventing downward movement of the adsorbent. In the lowermost adsorption treatment chamber, the target gas is brought into contact with the adsorbent to adsorb carbon dioxide in the target gas to the adsorbent. The adsorbent after carbon dioxide adsorption is conveyed to the uppermost regeneration treatment chamber by a conveyor, and in the regeneration treatment chamber, water vapor is brought into contact with the adsorbent after carbon dioxide adsorption to release carbon dioxide from the adsorbent. In the drying treatment chamber, a drying gas is brought into contact with the adsorbent after contact with water vapor to dry the adsorbent, and the dried adsorbent is supplied to the adsorption treatment chamber.

[0003] Japanese Patent No. 6298360

[0004] In a conventional carbon dioxide separation system, the used target gas discharged from the adsorption treatment chamber is usually discharged into the atmosphere after post-treatment such as dust collection. Also, the used drying gas discharged from the drying treatment chamber is usually discharged into the atmosphere after post-treatment such as dust collection. Therefore, post-treatment such as dust collection is required for each of the used target gas and the used drying gas, which is uneconomical.

[0005] The present disclosure has been made to solve the above problems, and an object thereof is to provide a carbon dioxide separation system capable of economically performing post-treatment of used gas for discharge into the atmosphere.

[0006] To achieve the above objective, a carbon dioxide separation system according to one embodiment of the present disclosure comprises: an adsorption treatment chamber to which a target gas containing carbon dioxide is supplied, the target gas is brought into contact with a granular adsorbent to adsorb carbon dioxide in the target gas onto the adsorbent, and the target gas after contact with the adsorbent is discharged; a regeneration treatment chamber to which water vapor is brought into contact with the adsorbent after carbon dioxide adsorption to release carbon dioxide from the adsorbent; and a drying treatment chamber to which a drying gas is supplied, the adsorbent is dried by bringing the drying gas into contact with the adsorbent after contact with the water vapor, and the drying gas after contact with the adsorbent is discharged, wherein the target gas discharged from the adsorption treatment chamber is supplied to the drying treatment chamber as the drying gas.

[0007] This disclosure has the effect of providing a carbon dioxide separation system having the configuration described above, which can economically perform post-treatment of spent gases for release into the atmosphere.

[0008] Figure 1 shows an example of a schematic configuration of the carbon dioxide separation system in the first embodiment. Figure 2 shows an example of a schematic configuration of the carbon dioxide separation system in the second embodiment.

[0009] Preferred embodiments of this disclosure will be described below with reference to the drawings. In the following description, identical or corresponding elements will be denoted by the same reference numerals throughout the drawings, and redundant explanations may be omitted. Furthermore, the drawings are schematic representations of each component for ease of understanding, and the shapes and dimensional ratios may not be precisely represented.

[0010] (First Embodiment) Figure 1 is a diagram showing an example of a schematic configuration of a carbon dioxide separation system in the first embodiment. The carbon dioxide separation system 1 shown in Figure 1 is a series of systems that selectively separate carbon dioxide from a target gas containing carbon dioxide using an adsorbent and regenerate the adsorbent used for separation. The target gas is, for example, combustion exhaust gas from a thermal power plant. As the adsorbent, for example, a granular solid absorbent can be used in which an amine is supported on a porous body with an average particle diameter of about 3 mm. As the porous body, silica gel, activated alumina, metal oxides, etc. can be used.

[0011] The carbon dioxide separation system 1 includes an adsorption chamber 2, a regeneration chamber 3, a drying chamber 4, an adsorbent transport device 5, and a fan 6, etc. In this example, the drying chamber 4 is located below the regeneration chamber 3, and the adsorption chamber 2 is located below the drying chamber 4. Adsorbent is always present inside the adsorption chamber 2, the regeneration chamber 3, and the drying chamber 4, and the adsorbent circulates through the adsorption chamber 2, the regeneration chamber 3, and the drying chamber 4 in that order via the adsorbent transport device 5. As the adsorbent transport device 5, for example, a conveyor such as a bucket conveyor or an air transport device may be used. Furthermore, the adsorption chamber 2, the regeneration chamber 3, and the drying chamber 4 can be configured as containers equipped with a discharge device at the lower end for discharging the adsorbent downwards. The adsorbent discharged from the container by the discharge device falls downwards due to its own weight. Also, as the adsorbent is discharged from the lower end of the container by the discharge device, the adsorbent inside the container moves downwards due to its own weight.

[0012] The adsorption treatment chamber 2 is a treatment chamber in which a target gas, such as combustion exhaust gas, is supplied, and an adsorption treatment is performed in which carbon dioxide in the target gas is adsorbed onto the adsorbent by bringing the target gas into contact with the adsorbent. The target gas is supplied to the adsorption treatment chamber 2 by a fan 6 through the target gas supply passage 2a. The used target gas, which is the target gas from which carbon dioxide has been removed by the adsorbent in the adsorption treatment chamber 2, is discharged from the adsorption treatment chamber 2 through the target gas discharge passage 2b and supplied to the conditioning unit 7. The adsorbent after carbon dioxide adsorption is discharged from the lower end of the adsorption treatment chamber 2 to the adsorbent transport device 5, and is transported by the adsorbent transport device 5 and supplied to the regeneration treatment chamber 3.

[0013] In the regeneration chamber 3, desorption steam, which is water vapor used to desorb carbon dioxide from the adsorbent after carbon dioxide adsorption, is supplied through the water vapor supply passage 3a. The regeneration chamber 3 is a treatment chamber for desorbing and releasing carbon dioxide from the adsorbent by bringing the desorption steam into contact with the adsorbent after carbon dioxide adsorption, and the adsorbent is regenerated by desorbing carbon dioxide from it.

[0014] In the regeneration chamber 3, the water vapor in the desorption water vapor condenses on the adsorbent upon contact with the adsorbent, causing carbon dioxide to be released from the adsorbent. The amount of water vapor in the desorption water vapor is such that almost all of it condenses on the adsorbent. The carbon dioxide released after being released from the adsorbent is discharged through the carbon dioxide recovery channel 3b. The carbon dioxide discharged through the carbon dioxide recovery channel 3b is compressed, for example, by a pump and stored in a carbon dioxide holder. The adsorbent with condensed water attached in the regeneration chamber 3 is discharged from the bottom of the regeneration chamber 3 and supplied to the drying chamber 4.

[0015] In the drying chamber 4, the used target gas discharged from the adsorption chamber 2 is conditioned by the conditioning device 7, and this conditioned gas is supplied as drying gas through the drying gas supply passage 4a. That is, the drying gas supply passage 4a is connected to the conditioning device 7. The drying chamber 4 is a processing chamber for drying the adsorbent by bringing the drying gas into contact with the adsorbent after it has come into contact with the desorbing water vapor. The used drying gas that has come into contact with the adsorbent in the drying chamber 4 is discharged from the drying chamber 4 through the drying gas discharge passage 4b. This used drying gas is subjected to post-treatment such as dust collection and released into the atmosphere. The dried adsorbent is discharged from the lower end of the drying chamber 4 and supplied to the adsorption chamber 2.

[0016] In the above configuration, the conditioning unit 7 includes a heater 71 for raising the used target gas to a predetermined temperature, a condenser 72 for removing moisture from the target gas, and a fan 73 for increasing the flow velocity of the target gas. This allows the used target gas to be supplied to the drying chamber 4 as a drying gas optimized for drying. The conditioning unit 7 may also be configured to include at least one of the heater 71, condenser 72, and fan 73. Furthermore, the conditioning unit 7 may be omitted in some cases. That is, the target gas discharge passage 2b may be directly connected to the drying gas supply passage 4a.

[0017] In this embodiment, the used target gas discharged from the adsorption treatment chamber 2 is reused as drying gas supplied to the drying treatment chamber 4. Therefore, post-treatment such as dust collection is unnecessary for the used target gas discharged from the adsorption treatment chamber 2 before release into the atmosphere, and post-treatment such as dust collection is only required for the used drying gas discharged from the drying treatment chamber 4, thus halving the amount of used gas that needs to be post-treated. Thus, post-treatment of used gas to be released into the atmosphere can be performed economically. In addition, the drying gas supplied to the drying treatment chamber 4 may contain residual carbon dioxide that was not adsorbed in the adsorption treatment chamber 2. In this case, when drying of the adsorbent begins in the drying treatment chamber 4, the adsorption of residual carbon dioxide to the adsorbent begins, thus reducing the carbon dioxide content in the used drying gas discharged from the drying treatment chamber 4.

[0018] Furthermore, by providing the conditioning device 7, the used target gas can be supplied to the drying chamber 4 as a drying gas optimized for drying. In conventional systems, for example, outside air is used as the drying gas, but in this case, the outside air is heated to a predetermined temperature by a heater, and the moisture is removed by a condenser before being sent to the drying chamber 4 by a fan, so a conditioning device is necessary.

[0019] In this embodiment, as shown in Figure 1, the adsorbent discharged from the adsorption treatment chamber 2 is transported to the regeneration treatment chamber 3 by the adsorbent transport device 5, but the embodiment is not limited to this. For example, as a first modification, the adsorption treatment chamber 2, the regeneration treatment chamber 3, and the drying treatment chamber 4 may be arranged in order from top to bottom, and the adsorbent discharged from the drying treatment chamber 4 may be transported to the adsorption treatment chamber 2 by the adsorbent transport device 5. As a second modification, the drying treatment chamber 4, the adsorption treatment chamber 2, and the regeneration treatment chamber 3 may be arranged in order from top to bottom, and the adsorbent discharged from the regeneration treatment chamber 3 may be transported to the drying treatment chamber 4 by the adsorbent transport device 5. Here, as in the example shown in Figure 1 and the second modification, by arranging the adsorption treatment chamber 2 below the drying treatment chamber 4, the path for supplying the used target gas discharged from the adsorption treatment chamber 2 to the drying treatment chamber 4 as a drying gas can be shortened. However, since the adsorbent discharged from the regeneration treatment chamber 3 has condensed water attached and is not easy to handle, it is preferable to supply it directly from the regeneration treatment chamber 3 to the drying treatment chamber 4 without going through the adsorbent transport device 5. From this viewpoint, the example shown in Figure 1 and the first modified example are preferable to the second modified example. Therefore, the example shown in Figure 1 is the most preferable.

[0020] Furthermore, in this embodiment, each of the three processing chambers, the regeneration processing chamber 3, the drying processing chamber 4, and the adsorption processing chamber 2, may be composed of an individual container, or two of the three processing chambers that are adjacent vertically may be composed of one container, or all three processing chambers may be composed of one container. In addition, any one of the three processing chambers may be composed of multiple containers arranged in parallel.

[0021] (Second Embodiment) In the first embodiment described above, a system was described in which the adsorbent is circulated and moved in the order of adsorption treatment chamber 2, regeneration treatment chamber 3, and drying treatment chamber 4. In the second embodiment, a system is described in which the adsorbent remains stored in the treatment container and does not move.

[0022] Figure 2 shows an example of a schematic configuration of a carbon dioxide separation system in the second embodiment. The carbon dioxide separation system 100 shown in Figure 2 comprises three processing containers 101 to 103, each containing an adsorbent.

[0023] Each of the three processing containers 101 to 103 is repeatedly used in the order of adsorption processing chamber, regeneration processing chamber, and drying processing chamber as time progresses. In this case, when one of the three processing containers 101 to 103, i.e., the first processing container, is used as the adsorption processing chamber, another processing container, i.e., the second processing container, is used as the regeneration processing chamber, and yet another processing container, i.e., the third processing container, is used as the drying processing chamber. The functions of the adsorption processing chamber, regeneration processing chamber, and drying processing chamber are the same as those of the adsorption processing chamber 2, regeneration processing chamber 3, and drying processing chamber 4 in the first embodiment. Each of the three processing containers 101 to 103 is in a state where the adsorbent is stored as described above.

[0024] Processing container 101 is connected to a target gas supply path 11, which branches off from the main target gas supply path 111 where a fan 6 is located, and has a valve B11 positioned in the middle, as well as a target gas discharge path 12, which has a valve B12 positioned in the middle. Similarly, processing container 102 is connected to a target gas supply path 21, which branches off from the main target gas supply path 111 and has a valve B21 positioned in the middle, as well as a target gas discharge path 22, which has a valve B22 positioned in the middle. Furthermore, processing container 103 is connected to a target gas supply path 31, which branches off from the main target gas supply path 111 and has a valve B31 positioned in the middle, as well as a target gas discharge path 32, which has a valve B32 positioned in the middle. Target gas discharge paths 12, 22, and 32 merge into the main target gas discharge path 112, where a conditioning device 7 is positioned in the middle, and the main target gas discharge path 112 branches off into drying gas supply paths 13, 23, and 33 downstream of the conditioning device 7.

[0025] Furthermore, the processing container 101 is connected to a drying gas supply passage 13 with valve B13 positioned in the middle, and to a drying gas discharge passage 14 with valve B14 positioned in the middle. Similarly, the processing container 102 is connected to a drying gas supply passage 23 with valve B23 positioned in the middle, and to a drying gas discharge passage 24 with valve B24 positioned in the middle. Furthermore, the processing container 103 is connected to a drying gas supply passage 33 with valve B33 positioned in the middle, and to a drying gas discharge passage 34 with valve B34 positioned in the middle. The drying gas discharge passages 14, 24, and 34 merge into the main drying gas discharge passage 114 downstream.

[0026] Furthermore, the processing container 101 is connected to a steam supply path 15 that branches off from the main steam supply path 115 and has a valve B15 positioned in the middle, as well as a carbon dioxide recovery path 16 with a valve B16 positioned in the middle. Similarly, the processing container 102 is connected to a steam supply path 25 that branches off from the main steam supply path 115 and has a valve B25 positioned in the middle, as well as a carbon dioxide recovery path 26 with a valve B26 positioned in the middle. The processing container 103 is connected to a steam supply path 35 that branches off from the main steam supply path 115 and has a valve B35 positioned in the middle, as well as a carbon dioxide recovery path 36 with a valve B36 positioned in the middle. The carbon dioxide recovery paths 16, 26, and 36 merge into the main carbon dioxide recovery path 116 downstream.

[0027] Figure 2 shows the case where valves B11 and B12 related to the target gas entering and leaving the processing container 101, valve B25 for introducing desorption steam into the processing container 102 and valve B26 for releasing carbon dioxide, and valves B33 and B34 related to the drying gas entering and leaving the processing container 103 are open, and all other valves are closed.

[0028] When each valve is in the state shown in Figure 2, the target gas, such as combustion exhaust gas, is supplied to the processing container 101 via the open valve B11. In other words, the processing container 101 is used as an adsorption processing chamber. The used target gas, from which carbon dioxide has been removed by the adsorbent in the processing container 101, is supplied from the processing container 101 to the conditioning device 7 of the main target gas discharge passage 112 via the open valve B12.

[0029] In the conditioning unit 7, the used target gas is heated to a predetermined temperature by the heater 71, moisture is removed by the condenser 72, and the gas flow rate is increased by the fan 73.

[0030] Furthermore, desorption steam is supplied to the processing container 102 through the open valve B25. In other words, the processing container 102 is used as a regeneration processing chamber. The carbon dioxide desorbed from the adsorbent in the processing container 102 is discharged through the open valve B26 via the main carbon dioxide recovery channel 116. The carbon dioxide discharged through the main carbon dioxide recovery channel 116 is compressed, for example, by a pump and stored in a carbon dioxide holder.

[0031] Furthermore, the used target gas discharged from the processing container 101 is conditioned by the conditioning device 7, and the gas discharged from the conditioning device 7 is supplied to the processing container 103 as drying gas via the open valve B33. In other words, the processing container 103 is used as a drying chamber. The used drying gas that has come into contact with the adsorbent in the processing container 103 is discharged from the processing container 103 through the open valve B34 via the main drying gas discharge passage 114. This used drying gas is then subjected to post-treatment such as dust collection and released into the atmosphere.

[0032] After the state shown in Figure 2, processing container 101 is used as a regeneration processing chamber, processing container 102 is used as a drying processing chamber, and processing container 103 is used as an adsorption processing chamber. In this case, valve B15 for introducing desorption water vapor into processing container 101 and valve B16 for releasing carbon dioxide, valves B23 and B24 related to the drying gas entering and leaving processing container 102, and valves B31 and B32 related to the target gas entering and leaving processing container 103 are open, while all other valves are closed.

[0033] Subsequently, processing container 101 is used as a drying chamber, processing container 102 is used as an adsorption chamber, and processing container 103 is used as a regeneration chamber. In this case, valves B13 and B14 related to the drying gas entering and leaving processing container 101, valves B21 and B22 related to the target gas entering and leaving processing container 102, valve B35 for introducing desorption water vapor into processing container 103, and valve B36 for releasing carbon dioxide are opened, while all other valves are closed.

[0034] In this manner, the valve state is switched so that each of the three processing containers 101 to 103 functions as an adsorption processing chamber, a regeneration processing chamber, and a drying processing chamber. In other words, adsorption processing, regeneration processing, and drying processing are performed in each of the three processing containers 101 to 103.

[0035] In this embodiment, the target gas discharged from the processing container used as an adsorption processing chamber is supplied to the processing container used as a drying processing chamber, thereby allowing the used target gas to be reused as a drying gas. Therefore, as in the first embodiment, post-treatment such as dust collection for release into the atmosphere becomes unnecessary for the used target gas, and post-treatment such as dust collection is only required for the used drying gas, thus halving the amount of used gas that needs to be treated. Thus, post-treatment of used gas for release into the atmosphere can be carried out economically.

[0036] Furthermore, in this embodiment as well as in the first embodiment, by providing a conditioning device 7, the used target gas can be supplied to the processing container used as a drying chamber as a drying gas optimized for drying. In this embodiment as well as in the first embodiment, the conditioning device 7 may be configured to include at least one of a heater 71, a condenser 72, and a fan 73, or the conditioning device 7 may be omitted in some cases. If the conditioning device 7 is not provided, the main target gas discharge passage 112 can be directly connected to the drying gas supply passages 13, 23, and 33.

[0037] In this embodiment, a carbon dioxide separation system having three processing containers 101 to 103 used as an adsorption processing chamber, a regeneration processing chamber, and a drying processing chamber is illustrated, but a configuration with four or more processing containers is also possible. Furthermore, in a carbon dioxide separation system having one or two processing containers used as an adsorption processing chamber, a regeneration processing chamber, and a drying processing chamber, it is also possible to apply a configuration in which the used target gas is used as a drying gas, as in this embodiment. In this case, a tank or the like for temporarily storing the used target gas may be provided.

[0038] From the above description, many improvements and other embodiments of the disclosure will be apparent to those skilled in the art. Therefore, the above description should be interpreted as illustrative only and is provided for the purpose of teaching those skilled in the art the best mode of carrying out the disclosure. The details of its structure and / or function can be substantially modified without departing from the spirit of the disclosure.

[0039] (Summary of the Disclosure) A carbon dioxide separation system according to a first aspect of the Disclosure comprises: an adsorption treatment chamber to which a target gas containing carbon dioxide is supplied, the target gas is brought into contact with a granular adsorbent to adsorb carbon dioxide in the target gas onto the adsorbent, and the target gas after contact with the adsorbent is discharged; a regeneration treatment chamber to which water vapor is brought into contact with the adsorbent after carbon dioxide adsorption to release carbon dioxide from the adsorbent; and a drying treatment chamber to which a drying gas is supplied, the adsorbent is dried by bringing the drying gas into contact with the adsorbent after contact with the water vapor, and the drying gas after contact with the adsorbent is discharged, wherein the target gas discharged from the adsorption treatment chamber is supplied to the drying treatment chamber as the drying gas.

[0040] This configuration allows the used target gas discharged from the adsorption treatment chamber to be reused as drying gas supplied to the drying treatment chamber. Therefore, post-treatment such as dust collection is unnecessary for the used target gas discharged from the adsorption treatment chamber before release into the atmosphere, and post-treatment such as dust collection is only required for the used drying gas discharged from the drying treatment chamber, thus halving the amount of used gas that needs to be treated. Thus, post-treatment of used gas to be released into the atmosphere can be carried out economically. In addition, the drying gas supplied to the drying treatment chamber may contain residual carbon dioxide that cannot be adsorbed in the adsorption treatment chamber. In this case, the adsorbent is dried in the drying treatment chamber, and the residual carbon dioxide comes into contact with the adsorbent, causing it to be adsorbed by the adsorbent, thereby reducing the carbon dioxide content in the used drying gas discharged from the drying treatment chamber.

[0041] A carbon dioxide separation system according to a second aspect of this disclosure is a carbon dioxide separation system according to a first aspect, wherein the adsorbent is circulated in the order of the adsorption treatment chamber, the regeneration treatment chamber, and the drying treatment chamber, and the adsorption treatment chamber is located below the drying treatment chamber.

[0042] According to this configuration, since the adsorption treatment chamber is arranged below the drying treatment chamber, the path for supplying the used target gas discharged from the adsorption treatment chamber to the drying treatment chamber as the drying gas can be shortened.

[0043] The carbon dioxide separation system according to the third aspect of the present disclosure is the carbon dioxide separation system according to the first aspect, which includes three or more treatment containers stored with the adsorbent therein and repeatedly used as the adsorption treatment chamber, the regeneration treatment chamber, and the drying treatment chamber in this order over time. Among the three or more treatment containers, when the first treatment container is used as the adsorption treatment chamber, the second treatment container is used as the regeneration treatment chamber, and the third treatment container is used as the drying treatment chamber.

[0044] According to this configuration, in a system in which adsorption treatment, regeneration treatment, and drying treatment are performed in each of three or more treatment containers, the target gas discharged from the treatment container used as the adsorption treatment chamber can be supplied to the treatment container used as the drying treatment chamber, so that the used target gas can be reused as the drying gas.

[0045] The carbon dioxide separation system according to the fourth aspect of the present disclosure is the carbon dioxide separation system according to any one of the first to third aspects, further including a conditioning device that introduces the target gas discharged from the adsorption treatment chamber, performs at least one of a treatment for removing moisture from the target gas, a treatment for increasing the temperature of the target gas, and a treatment for increasing the flow rate of the target gas, and then supplies it to the drying treatment chamber as the drying gas.

[0046] According to this configuration, the used target gas discharged from the adsorption treatment chamber can be supplied by the conditioning device as the drying gas optimal for the drying treatment in the drying treatment chamber.

[0047] 1,100 Carbon dioxide separation system 2 Adsorption treatment chamber 3 Regeneration treatment chamber 4 Drying treatment chamber 7 Conditioning device 101 - 103 Treatment containers

Claims

1. A carbon dioxide separation system comprising: an adsorption treatment chamber into which a target gas containing carbon dioxide is supplied, the target gas is brought into contact with a granular adsorbent to adsorb carbon dioxide in the target gas onto the adsorbent, and the target gas after contact with the adsorbent is discharged; a regeneration treatment chamber into which water vapor is brought into contact with the adsorbent after carbon dioxide adsorption to release carbon dioxide from the adsorbent; and a drying treatment chamber into which a drying gas is supplied, the adsorbent is dried by bringing the drying gas into contact with the adsorbent after contact with the water vapor, and the drying gas after contact with the adsorbent is discharged, wherein the target gas discharged from the adsorption treatment chamber is supplied to the drying treatment chamber as the drying gas.

2. The carbon dioxide separation system according to claim 1, wherein the adsorbent is circulated in the order of the adsorption treatment chamber, the regeneration treatment chamber, and the drying treatment chamber, and the adsorption treatment chamber is located below the drying treatment chamber.

3. A carbon dioxide separation system according to claim 1, comprising three or more processing containers in which the adsorbent is stored internally and which are repeatedly used as the adsorption processing chamber, the regeneration processing chamber, and the drying processing chamber in that order over time, wherein when the first processing container is used as the adsorption processing chamber, the second processing container is used as the regeneration processing chamber and the third processing container is used as the drying processing chamber.

4. A carbon dioxide separation system according to any one of claims 1 to 3, further comprising a conditioning device that introduces the target gas discharged from the adsorption treatment chamber, performs at least one of the following treatments: a treatment to remove moisture from the target gas, a treatment to raise the temperature of the target gas, and a treatment to increase the flow rate of the target gas, and then supplies the result to the drying treatment chamber as the drying gas.

Images