Atmospheric carbon dioxide separation recovery facility

Abstract

To provide an atmospheric carbon dioxide separation recovery facility that can efficiently execute adsorption processing using large amounts of particulate adsorbent.SOLUTION: An atmospheric carbon dioxide separation recovery facility comprises: a plurality of adsorption processing chambers that execute adsorption processing for making particulate adsorbent adsorb carbon dioxide included in the atmosphere, by bringing the atmosphere into contact with the adsorbent stored therein; and a regeneration processing chamber that executes regeneration processing for desorbing carbon dioxide from the adsorbent, by bringing vapor into contact with the particulate adsorbent stored therein. The plurality of adsorption processing chambers take adsorbent subjected to the regeneration processing in the regeneration processing chamber thereinto, and execute the adsorption processing using the taken-in adsorbent. The regeneration processing chamber takes the adsorbent used for the adsorption processing in the adsorption processing chambers thereinto, and executes the regeneration processing to the taken-in adsorbent.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to an atmospheric carbon dioxide separation and recovery facility that separates and recovers carbon dioxide from the atmosphere.

Background Art

[0002] Patent Document 1 below discloses a technique for adsorbing carbon dioxide in the air to a particulate adsorbent, and a technique for separating carbon dioxide from the adsorbent adsorbed with carbon dioxide using steam.

Prior Art Document

Patent Document

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In an atmospheric carbon dioxide separation and recovery facility, when performing an adsorption process on the atmosphere using a particulate adsorbent, it is conceivable to increase the volume of the adsorption processing chamber in order to improve efficiency. However, if a large amount of adsorbent is filled in a large-volume adsorption processing chamber, it becomes difficult for the atmosphere to flow between the adsorbents, and rather, the efficiency of the adsorption process may decrease.

[0005] Therefore, an object of the present disclosure is to provide an atmospheric carbon dioxide separation and recovery facility capable of efficient adsorption processing when using a particulate adsorbent.

Means for Solving the Problems

[0006] An apparatus for separating and recovering carbon dioxide in the atmosphere according to one aspect of the present disclosure includes a plurality of adsorption treatment chambers that perform an adsorption treatment of adsorbing carbon dioxide contained in the atmosphere to an adsorbent by bringing the atmosphere into contact with a particulate adsorbent accommodated therein, and a regeneration treatment chamber that performs a regeneration treatment of desorbing carbon dioxide from the adsorbent by bringing steam into contact with the particulate adsorbent accommodated therein. The plurality of adsorption treatment chambers take in the adsorbent regenerated in the regeneration treatment chamber and perform an adsorption treatment using the taken-in adsorbent. The regeneration treatment chamber takes in the adsorbent used for the adsorption treatment in the plurality of adsorption treatment chambers and performs a regeneration treatment on the taken-in adsorbent.

Effects of the Invention

[0007] According to this configuration, when using a particulate adsorbent, it is possible to provide an apparatus for separating and recovering carbon dioxide in the atmosphere capable of efficient adsorption treatment.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Modes for Carrying Out the Invention

[0009] (First Embodiment) Hereinafter, embodiments will be described. First, a carbon dioxide separation and recovery facility (hereinafter referred to as the "separation and recovery facility") 100 according to the first embodiment will be described. FIG. 1 is a schematic diagram of the separation and recovery facility 100 according to the first embodiment, as viewed from the front side. Also, FIG. 2 is a schematic diagram of the separation and recovery facility 100 according to the first embodiment, as viewed from the back side.

[0010] The separation and recovery facility 100 is a facility for separating and recovering carbon dioxide from the atmosphere. That is, the separation and recovery facility 100 is a Direct Air Capture (DAC) facility. The separation and recovery facility 100 includes an adsorption treatment chamber 10, a regeneration treatment chamber 20, and a suction device 30. Hereinafter, these components will be described in order.

[0011] <Adsorption Treatment Chamber> The adsorption treatment chamber 10 is a room for performing an adsorption treatment to adsorb carbon dioxide contained in the atmosphere onto an adsorbent. The adsorbent used in the adsorption treatment is the adsorbent regenerated in the regeneration treatment chamber 20 described later. The adsorption treatment chamber 10 takes in the adsorbent regenerated in the regeneration treatment chamber 20 and performs an adsorption treatment using the taken-in adsorbent. The adsorbent in this embodiment is in a particulate form, and an adsorbent in which an amine is impregnated into a porous carrier is used. However, the adsorbent is not limited to the above.

[0012] The separation and recovery facility 100 according to this embodiment includes a plurality of adsorption treatment chambers 10. The number of adsorption treatment chambers 10 provided in the separation and recovery facility 100 is not limited. Each adsorption treatment chamber 10 is configured in the same way and has the same volume. The atmosphere comes into contact with the adsorbent by passing through the inside of the adsorption treatment chamber 10 in which the adsorbent is accommodated. As a result, carbon dioxide in the atmosphere is adsorbed onto the adsorbent and recovered.

[0013] The adsorption treatment chamber 10 of this embodiment has a plate-like shape perpendicular to the horizontal direction. The adsorption treatment chamber 10 includes an inflow surface 11 corresponding to one main surface as shown in FIG. 1, and an outflow surface 12 corresponding to the other main surface as shown in FIG. 2. The inflow surface 11 and the outflow surface 12 are formed of, for example, a net-like member and can allow air to pass through. As shown in FIG. 1, air flows into the adsorption treatment chamber 10 from the outside of the adsorption treatment chamber 10 through the inflow surface 11. Also, as shown in FIG. 2, the air that has flowed into the adsorption treatment chamber 10 passes through the gaps between the adsorbents and flows out of the adsorption treatment chamber 10 through the outflow surface 12. In this embodiment, the inflow surface 11 and the outflow surface 12 are parallel to each other.

[0014] Here, the distance from the inflow surface 11 to the outflow surface 12 is referred to as the "passage distance D", the longitudinal dimensions of the inflow surface 11 and the outflow surface 12 are respectively referred to as the "longitudinal dimension L1" and the "longitudinal dimension L2", and the dimensions in the direction perpendicular to the longitudinal direction of the inflow surface 11 and the outflow surface 12 are respectively referred to as the "width dimension W1" and the "width dimension W2". Then, the passage distance D is smaller than the longitudinal dimension L1 and the width dimension W1 of the inflow surface 11, and smaller than the longitudinal dimension L2 and the width dimension W2 of the outflow surface 12. According to this configuration, while ensuring a volume of the adsorption treatment chamber 10 of a certain level or more, the pressure loss of the air in the adsorption treatment chamber 10 can be reduced by shortening the moving distance of the air in the adsorption treatment chamber 10.

[0015] Also, the longitudinal dimension L1 of the inflow surface 11 is larger than the width dimension W1, and the longitudinal dimension L2 of the outflow surface 12 is larger than the width dimension W2. In this embodiment, the inflow surface 11 and the outflow surface 12 extend in the vertical direction. Therefore, the longitudinal dimension L1 of the inflow surface 11 and the longitudinal dimension L2 of the outflow surface 12 respectively correspond to the height of the inflow surface 11 and the height of the outflow surface 12. Also, the width dimension W1 of the inflow surface 11 and the width dimension W2 of the outflow surface 12 respectively correspond to the lateral width of the inflow surface 11 and the lateral width of the outflow surface 12.

[0016] However, when the inflow surface 11 and the outflow surface 12 are inclined with respect to the vertical direction, or when they have a horizontally long shape, the vertical dimension L1 of the inflow surface 11 and the vertical dimension L2 of the outflow surface 12 do not necessarily coincide with the height of the inflow surface 11 and the height of the outflow surface 12, respectively, and the width dimension W1 of the inflow surface 11 and the width dimension W2 of the outflow surface 12 do not necessarily coincide with the horizontal width of the inflow surface 11 and the horizontal width of the outflow surface 12, respectively.

[0017] Note that the vertical dimension L1 of the inflow surface 11 may be the same as or different from the vertical dimension L2 of the outflow surface 12. Similarly, the width dimension W1 of the inflow surface 11 may be the same as or different from the width dimension W2 of the outflow surface 12. Also, although the inflow surface 11 and the outflow surface 12 of the present embodiment are rectangular, the inflow surface 11 and the outflow surface 12 may have a shape other than rectangular. Furthermore, the inflow surface 11 and the outflow surface 12 may have different shapes from each other.

[0018] The adsorbents in the adsorption treatment chamber 10 are sequentially replaced. The adsorption treatment chamber 10 includes a supply port 13 for taking in the adsorbent and a discharge port 14 for discharging the adsorbent. In the present embodiment, the supply port 13 is located at the upper end portion of the adsorption treatment chamber 10, and the discharge port 14 is located at the lower end portion of the adsorption treatment chamber 10. The adsorbent discharged from the adsorption treatment chamber 10 is transferred to the regeneration treatment chamber 20 by the first transfer device 15 and supplied to the regeneration treatment chamber 20. The first transfer device 15 is, for example, a bucket conveyor or an air conveyor.

[0019] Also, the adsorption treatment chambers 10 are arranged in parallel and are connected in parallel. Since the adsorption treatment chambers 10 are connected in parallel, the adsorbent discharged from a certain adsorption treatment chamber 10 does not directly flow into other adsorption treatment chambers 10. In the present embodiment, since the separation and recovery facility 100 includes a plurality of adsorption treatment chambers 10, even when adsorption treatment is carried out using a large amount of adsorbent, the adsorbent is divided among the plurality of adsorption treatment chambers 10 for adsorption treatment. Therefore, the amount of adsorbent accommodated in each adsorption treatment chamber 10 can be suppressed, and adsorption treatment can be carried out efficiently.

[0020] <Regeneration Treatment Chamber> The regeneration processing chamber 20 is a chamber that performs a regeneration process for desorbing carbon dioxide from the adsorbent. The adsorbent to be subjected to the regeneration process is the adsorbent used in the adsorption process in the adsorption processing chamber 10. The regeneration processing chamber 20 takes in the adsorbent used in the adsorption process in the adsorption processing chamber 10 and performs a regeneration process by bringing steam into contact with the taken-in adsorbent. Note that the regeneration processing chamber 20 of the present embodiment is a sealable container. In the regeneration process of the present embodiment, in order to make the inside of the regeneration processing chamber 20 negative pressure, the regeneration processing chamber 20 is formed so as to be able to withstand negative pressure.

[0021] The regeneration processing chamber 20 includes a supply port 21 for taking in the adsorbent and a discharge port 22 for discharging the adsorbent. In the present embodiment, the supply port 21 is located at the upper end portion of the regeneration processing chamber 20, and the discharge port 22 is located at the lower end portion of the regeneration processing chamber 20. The regenerated adsorbent is discharged from the discharge port 22 of the regeneration processing chamber 20. The adsorbent discharged from the regeneration processing chamber 20 is transferred to the adsorption processing chamber 10 by the second transfer device 23 and supplied to the adsorption processing chamber 10. The second transfer device 23 is, for example, a bucket conveyor or an air conveyor.

[0022] The regeneration processing chamber 20 of the present embodiment is located laterally as viewed from the adsorption processing chamber 10. Specifically, the supply port 21 of the regeneration processing chamber 20 is not located below the discharge port 14 of the adsorption processing chamber 10, and the discharge port 22 of the regeneration processing chamber 20 is not located above the supply port 13 of the adsorption processing chamber 10. That is, the adsorption processing chamber 10 and the regeneration processing chamber 20 are arranged side by side in the horizontal direction and not in the vertical direction. Therefore, the height of the separation and recovery facility 100 can be suppressed.

[0023] Note that the volume of the regeneration processing chamber 20 of the present embodiment is the same as the volume of each adsorption processing chamber 10. Therefore, the amount of adsorbent that the regeneration processing chamber 20 can regenerate at one time is the same as the amount of adsorbent accommodated in each adsorption processing chamber 10. However, the volume of the regeneration processing chamber 20 may be larger than the volume of each adsorption processing chamber 10. Also, the total volume obtained by summing up the volumes of all the adsorption processing chambers 10 is larger than the volume of the regeneration processing chamber 20.

[0024] <Suction device> The suction device 30 is a device that sucks the air inside the adsorption treatment chamber 10. As shown in FIG. 2, the suction device 30 is located outside the adsorption treatment chamber 10 and on the outflow surface 12 side. The suction device 30 of the present embodiment is, for example, a fan or the like, but the suction device 30 is not limited thereto, and may be, for example, a negative pressure tank or a pipe connected to a negative pressure chimney. Note that the separation and recovery facility 100 may be provided with a blowing device such as a fan that supplies air to the inflow surface 11 of the adsorption treatment chamber 10 instead of the suction device 30.

[0025] The suction device 30 sucks the air inside the adsorption treatment chamber 10 through the outflow surface 12 of the adsorption treatment chamber 10, so that air flows into the adsorption treatment chamber 10 from the outside of the adsorption treatment chamber 10 through the inflow surface 11. Thus, in the present embodiment, instead of a blowing device that blows air toward the inflow surface 11 of the adsorption treatment chamber 10, the suction device 30 is used to allow air to flow into the adsorption treatment chamber 10.

[0026] Therefore, according to the present embodiment, the temperature rise of the air flowing into the adsorption treatment chamber 10 due to passing through the blowing device can be prevented. Since the adsorbent is more likely to adsorb carbon dioxide at a lower temperature, in the present embodiment, relatively low-temperature air flows into the adsorption treatment chamber 10, so that the temperature rise of the adsorbent due to the air is suppressed, and the adsorption treatment can be efficiently performed.

[0027] <Operation of the separation and recovery facility> Next, the operation of the separation and recovery facility 100 will be described. Here, to simplify the explanation, it is assumed that the separation and recovery facility 100 includes two adsorption treatment chambers 10 and one regeneration treatment chamber 20. Further, the adsorption treatment time is set to be twice the regeneration treatment time. Specifically, the adsorption treatment time is set to 2 hours, and the regeneration treatment time is set to 1 hour. The “adsorption treatment time” as used herein refers to the time of the adsorption treatment performed using the adsorbent until the adsorption treatment chamber 10 takes in and discharges the adsorbent. The “regeneration treatment time” refers to the time of the regeneration treatment performed on the adsorbent until the regeneration treatment chamber 20 takes in and discharges the adsorbent.

[0028] First, the separation and recovery facility 100 simultaneously performs the adsorption process and the regeneration process. The adsorption process is carried out in two adsorption chambers 10 respectively. Specifically, with both adsorption chambers 10 containing the adsorbent, the corresponding suction devices 30 are driven for each. Thereby, the atmosphere flows into both adsorption chambers 10 and passes through the interior, and carbon dioxide in the atmosphere is adsorbed by the adsorbent and recovered.

[0029] On the other hand, in the regeneration process, with the regeneration chamber 20 containing the adsorbent, the regeneration chamber 20 is sealed. Then, the interior of the regeneration chamber 20 is made into a negative pressure state, and low-temperature steam is supplied to the regeneration chamber 20. Thereby, carbon dioxide desorbs from the adsorbent, and the adsorbent is regenerated. At this time, the regeneration chamber 20 may be heated or kept warm.

[0030] Subsequently, when the regeneration process is carried out for 1 hour and the regeneration process ends, the suction device 30 corresponding to one of the two adsorption chambers 10 is stopped, and the adsorption process in the said one adsorption chamber 10 ends. At this time, the adsorption process in the other adsorption chamber 10 among the two adsorption chambers 10 continues.

[0031] The adsorption chamber 10 where the adsorption process has ended discharges all the adsorbent used in the adsorption process, and the discharged adsorbent is supplied to the regeneration chamber 20 by the first transfer device 15. At the same time, the regeneration chamber 20 discharges all the regenerated adsorbent, and the discharged adsorbent is supplied to the adsorption chamber 10 where the adsorption process has ended by the second transfer device 23. That is, the adsorbent is exchanged between the adsorption chamber 10 where the adsorption process has ended and the regeneration chamber 20.

[0032] Subsequently, the regeneration process is resumed in the regeneration processing chamber 20, and the adsorption process is resumed in the adsorption processing chamber 10 where the adsorbent has been replaced. Note that the regeneration processing chamber 20 performs the regeneration process on the adsorbent discharged from the adsorption processing chamber 10 all at once. After that, when the regeneration process is carried out for 1 hour and the regeneration process is completed, the adsorbent is replaced between the adsorption processing chamber 10 different from the one where the adsorbent has been replaced and the regeneration processing chamber 20. After the replacement of the adsorbent is completed, the regeneration process is resumed in the regeneration processing chamber 20, and the adsorption process is resumed in the adsorption processing chamber 10 where the adsorbent has been replaced.

[0033] In this way, the two adsorption processing chambers 10 discharge the adsorbent with a time shift, and the replacement of the adsorbent is alternately performed every 1 hour. As a result, the adsorbent is replaced every 1 hour in the regeneration processing chamber 20, and the adsorbent is replaced every 2 hours in each adsorption processing chamber 10. By repeating the above cycle, even when the adsorption processing time (2 hours in the above example) and the regeneration processing time (1 hour in the above example) are different, the adsorption process and the regeneration process can be continuously performed.

[0034] Note that in the above, the adsorption processing time was twice the regeneration processing time, but the adsorption processing time may be twice or more the regeneration processing time. In this case, the number of adsorption processing chambers 10 provided in the separation and recovery facility 100 may be twice or more the number of regeneration processing chambers 20. The separation and recovery facility 100 according to the present embodiment separates and recovers carbon dioxide in the atmosphere instead of exhaust gas, but the amount of carbon dioxide contained in the atmosphere is much less than the amount of carbon dioxide contained in the exhaust gas. Therefore, the adsorbent can sufficiently adsorb carbon dioxide even when exposed to the atmosphere for a long time. Therefore, by increasing the number of adsorption processing chambers 10 compared to the number of regeneration processing chambers 20 as in the present embodiment, that is, by making the total volume of the adsorption processing chambers 10 larger than the volume of the regeneration processing chamber 20, a long adsorption processing time can be ensured, the ability of the adsorbent can be sufficiently exerted, and ultimately an efficient adsorption process becomes possible.

[0035] In addition, in the above description, the supply of the adsorbent to the regeneration processing chamber 20 and the supply of the adsorbent to the adsorption processing chamber 10 where the adsorption processing has been completed were performed simultaneously. However, if it is difficult to perform them simultaneously, the separation and recovery facility 100 may be configured to include, for example, three adsorption processing chambers 10. That is, the number of adsorption processing chambers 10 included in the separation and recovery facility 100 may be three times the number of regeneration processing chambers 20. According to this configuration, while the three adsorption processing chambers 10 are being regenerated in sequence, the interiors are emptied and put on standby, so that the adsorption processing and the regeneration processing can be performed continuously.

[0036] (Second Embodiment) Next, the separation and recovery facility 200 according to the second embodiment will be described. FIG. 3 is a schematic view of the separation and recovery facility 200 according to the second embodiment, as viewed from the front side. The separation and recovery facility 200 according to the second embodiment is different from the separation and recovery facility 100 according to the first embodiment in that it includes a regeneration processing standby chamber 40. Except for this point, the separation and recovery facility 200 according to the second embodiment has the same configuration as the separation and recovery facility 100 according to the first embodiment.

[0037] The regeneration processing standby chamber 40 is a room that takes in the adsorbent discharged from each adsorption processing chamber 10 and temporarily stores it. When the adsorbent stored in the regeneration processing standby chamber 40 is discharged, it is transferred to the regeneration processing chamber 20. The regeneration processing standby chamber 40 includes a supply port 41 for taking in the adsorbent and a discharge port 42 for discharging the adsorbent. In the present embodiment, the supply port 41 is located at the upper end portion of the regeneration processing standby chamber 40, and the discharge port 42 is located at the lower end portion of the regeneration processing standby chamber 40.

[0038] The regeneration processing standby chamber 40 is downstream of the discharge port 14 of the adsorption processing chamber 10 and upstream of the supply port 21 of the regeneration processing chamber 20 in the flow direction of the adsorbent. In the present embodiment, the regeneration processing standby chamber 40 is located above the regeneration processing chamber 20. However, the position of the regeneration processing standby chamber 40 is not limited, and the regeneration processing standby chamber 40 may be located, for example, on the first transfer device 15. Also, the regeneration processing standby chamber 40 in the present embodiment has the same volume as each adsorption processing chamber 10. However, the volume may be larger than that of each adsorption processing chamber 10.

[0039] In the separation and recovery facility 200 according to the present embodiment, when replacing the adsorbent, first, all the adsorbents accommodated in the adsorption treatment chamber 10 where the adsorbent replacement is carried out are discharged, and the adsorbents discharged from the adsorption treatment chamber 10 are temporarily accommodated in the regeneration treatment waiting chamber 40. Next, while discharging the adsorbent accommodated in the regeneration treatment chamber 20, the adsorption treatment chamber 10 where the adsorbent replacement is carried out takes in the adsorbent discharged from the regeneration treatment chamber 20. As a result, the emptied adsorption treatment chamber 10 is filled with the adsorbent. Thereafter, the regeneration treatment waiting chamber 40 discharges the adsorbent temporarily accommodated therein, and the regeneration treatment chamber 20 takes in the adsorbent discharged from the regeneration treatment waiting chamber 40. As a result, the emptied regeneration treatment chamber 20 is filled with the adsorbent. Thus, the replacement of the adsorbent is completed.

[0040] As described above, according to the present embodiment, a time lag occurs from when the adsorption treatment chamber 10 finishes discharging the adsorbent to when the adsorption treatment chamber 10 takes in the adsorbent. Therefore, the supply of the adsorbent to the adsorption treatment chamber 10 and the discharge of the adsorbent from the adsorption treatment chamber 10 are not performed simultaneously, and it is possible to prevent the adsorbent after the regeneration treatment from being mixed with the adsorbent before the regeneration treatment. Furthermore, in order to create the above time lag, for example, it is not necessary to take measures such as stopping the operation of some of the adsorption treatment chambers 10 while the regeneration treatment is being carried out. Therefore, according to the present embodiment, the adsorption treatment can be efficiently carried out.

[0041] (Third Embodiment) Next, the separation and recovery facility 300 according to the third embodiment will be described. FIG. 4 is a schematic view of the separation and recovery facility 300 according to the third embodiment, as viewed from the front side. The separation and recovery facility 300 according to the third embodiment is different from the separation and recovery facility 100 according to the first embodiment in that it includes an adsorption treatment waiting chamber 50. Other than this point, the separation and recovery facility 300 according to the third embodiment has the same configuration as the separation and recovery facility 100 according to the first embodiment.

[0042] The adsorption process waiting chamber 50 is a room that takes in the adsorbent discharged from the regeneration processing chamber 20 and temporarily stores it. When the adsorbent stored in the adsorption process waiting chamber 50 is discharged, it is transferred to each adsorption processing chamber 10. The adsorption process waiting chamber 50 includes a supply port 51 for taking in the adsorbent and a discharge port 52 for discharging the adsorbent. In the present embodiment, the supply port 51 is located at the upper end portion of the adsorption process waiting chamber 50, and the discharge port 52 is located at the lower end portion of the adsorption process waiting chamber 50.

[0043] The adsorption process waiting chamber 50 is downstream of the discharge port 22 of the regeneration processing chamber 20 and upstream of the supply port 13 of the adsorption processing chamber 10 in the flow direction of the adsorbent. In the present embodiment, the adsorption process waiting chamber 50 is located below the regeneration processing chamber 20. However, the position of the adsorption process waiting chamber 50 is not limited, and the adsorption process waiting chamber 50 may be located, for example, on the second transfer device 23. Also, the adsorption process waiting chamber 50 of the present embodiment has the same volume as the regeneration processing chamber 20. However, the volume may be larger than that of the regeneration processing chamber 20.

[0044] In the separation and recovery facility 300 according to the present embodiment, when replacing the adsorbent, first, the regeneration processing chamber 20 discharges the adsorbent, and the adsorption process waiting chamber 50 temporarily stores the adsorbent discharged from the regeneration processing chamber 20. Next, while discharging all the adsorbent stored in the adsorption processing chamber 10 where the adsorbent replacement is carried out, the regeneration processing chamber 20 takes in the adsorbent discharged from the adsorption processing chamber 10. As a result, the emptied regeneration processing chamber 20 is filled with the adsorbent. Then, the adsorbent temporarily stored in the adsorption process waiting chamber 50 is discharged, and the adsorption processing chamber 10 where the adsorbent replacement is carried out takes in the adsorbent discharged from the adsorption process waiting chamber 50. As a result, the emptied adsorption processing chamber 10 is filled with the adsorbent. Thus, the replacement of the adsorbent is completed.

[0045] Thus, according to this embodiment, similar to the second embodiment, a time lag occurs from when the adsorption treatment chamber 10 finishes discharging the adsorbent until the adsorption treatment chamber 10 takes in the adsorbent. Therefore, the supply of the adsorbent to the adsorption treatment chamber 10 and the discharge of the adsorbent from the adsorption treatment chamber 10 are not performed simultaneously, and it is possible to prevent the adsorbent after the regeneration treatment from being mixed with the adsorbent before the regeneration treatment. Furthermore, in order to create the above-mentioned time lag, for example, it is not necessary to take measures such as stopping the operation of some of the adsorption treatment chambers 10 while the regeneration treatment is being carried out. Therefore, according to this embodiment, the adsorption treatment can be efficiently carried out.

[0046] (Summary) The first item disclosed in this specification is an atmospheric carbon dioxide separation and recovery facility including: a plurality of adsorption treatment chambers that perform an adsorption treatment of adsorbing carbon dioxide contained in the atmosphere to a particulate adsorbent accommodated therein by bringing the atmosphere into contact with the adsorbent; and a regeneration treatment chamber that performs a regeneration treatment of desorbing carbon dioxide from the adsorbent by bringing steam into contact with the particulate adsorbent accommodated therein. The plurality of adsorption treatment chambers take in the adsorbent regenerated in the regeneration treatment chamber therein and perform the adsorption treatment using the taken-in adsorbent. The regeneration treatment chamber takes in the adsorbent used for the adsorption treatment in the plurality of adsorption treatment chambers therein and performs the regeneration treatment on the taken-in adsorbent.

[0047] According to this configuration, since the atmospheric carbon dioxide separation and recovery facility includes a plurality of adsorption treatment chambers, the amount of the adsorbent accommodated in each adsorption treatment chamber can be suppressed, and as a result, an efficient adsorption treatment is possible.

[0048] The second item disclosed in this specification is the atmospheric carbon dioxide separation and recovery facility according to the first item, wherein the total volume of the plurality of adsorption treatment chambers is larger than the volume of the regeneration treatment chamber.

[0049] The atmospheric carbon dioxide separation and recovery facility performs an adsorption process on the atmosphere rather than on exhaust gas. According to the above configuration, by ensuring a long adsorption process time, the capacity of the adsorbent can be fully exerted, and an efficient adsorption process can be achieved.

[0050] The third item disclosed in this specification is the atmospheric carbon dioxide separation and recovery facility according to the second item, wherein the plurality of adsorption treatment chambers are connected in parallel, and each adsorption treatment chamber discharges all of the adsorbent accommodated therein at staggered timings after the adsorption treatment is performed, and the regeneration treatment chamber performs a regeneration treatment on the same amount of adsorbent as the adsorbent discharged from each adsorption treatment chamber at staggered timings at one time.

[0051] According to this configuration, the adsorption process and the regeneration process can be continuously performed.

[0052] The fourth item disclosed in this specification is the atmospheric carbon dioxide separation and recovery facility according to the third item, wherein the regeneration treatment chamber is located laterally as viewed from the plurality of adsorption treatment chambers.

[0053] According to this configuration, the height of the atmospheric carbon dioxide separation and recovery facility can be suppressed.

[0054] The fifth item disclosed in this specification is the atmospheric carbon dioxide separation and recovery facility according to the third item, which includes a regeneration treatment standby chamber having the same volume as the regeneration treatment chamber or a larger volume than the regeneration treatment chamber, and temporarily accommodating the adsorbent discharged from each adsorption treatment chamber.

[0055] According to this configuration, a time lag can be created from when the adsorption treatment chamber finishes discharging the adsorbent until the supply of the adsorbent to the adsorption treatment chamber is started, and as a result, the adsorption treatment can be efficiently performed.

[0056] The sixth item disclosed in this specification is the atmospheric carbon dioxide separation and recovery facility according to item 3, which includes an adsorption treatment waiting chamber having the same volume as each of the adsorption treatment chambers or a larger volume than each of the adsorption treatment chambers, and temporarily storing the adsorbent discharged from the regeneration treatment chamber.

[0057] According to this configuration, a time lag can be created from when the adsorption treatment chamber finishes discharging the adsorbent until the supply of the adsorbent to the adsorption treatment chamber starts. As a result, the adsorption treatment can be efficiently carried out.

[0058] The seventh item disclosed in this specification is the atmospheric carbon dioxide separation and recovery facility according to any one of items 1 to 6, wherein each of the plurality of adsorption treatment chambers includes an inflow surface through which air flows into the adsorption treatment chamber from the outside of the adsorption treatment chamber and an outflow surface through which air flows out of the adsorption treatment chamber from the inside of the adsorption treatment chamber.

[0059] According to this configuration, a large amount of air can be taken into the adsorption treatment chamber through the inflow surface, so that the adsorption treatment can be efficiently performed.

[0060] The eighth item disclosed in this specification is the atmospheric carbon dioxide separation and recovery facility according to item 7, which is provided with a plurality of suction devices located outside each adsorption treatment chamber and sucking the air inside the adsorption treatment chamber through the outflow surface, thereby allowing air to flow into the adsorption treatment chamber from the outside of the adsorption treatment chamber through the inflow surface.

[0061] According to this configuration, the temperature of the air flowing into the adsorption treatment chamber can be suppressed, so that the temperature rise of the adsorbent is suppressed, and the adsorption treatment can be efficiently carried out.

[0062] The ninth item disclosed in this specification is the atmospheric carbon dioxide separation and recovery facility according to item 7 or 8, wherein the distance from the inflow surface to the outflow surface is smaller than the vertical dimension and the width dimension of the inflow surface and smaller than the vertical dimension and the width dimension of the outflow surface.

[0063] According to this configuration, while ensuring that the volume of the adsorption treatment chamber is a certain amount or more, the pressure loss of the atmosphere can be reduced by shortening the moving distance of the atmosphere in the adsorption treatment chamber.

Explanation of Signs

[0064] 10 Adsorption treatment chamber 11 Inflow surface 12 Outflow surface 15 First transfer device 20 Regeneration treatment chamber 23 Second transfer device 30 Suction device 40 Regeneration treatment waiting chamber 50 Adsorption treatment waiting chamber 100 Atmospheric carbon dioxide separation and recovery equipment 200 Atmospheric carbon dioxide separation and recovery equipment 300 Atmospheric carbon dioxide separation and recovery equipment

Claims

1. A plurality of adsorption treatment chambers that perform an adsorption treatment of adsorbing carbon dioxide contained in the atmosphere to the adsorbent by bringing the atmosphere into contact with a particulate adsorbent accommodated therein; A regeneration treatment chamber that performs a regeneration treatment of desorbing carbon dioxide from the adsorbent by bringing steam into contact with the particulate adsorbent accommodated therein, and comprising: The plurality of adsorption treatment chambers take in the adsorbent regenerated in the regeneration treatment chamber therein, and perform an adsorption treatment using the taken-in adsorbent; The regeneration treatment chamber takes in the adsorbent used for the adsorption treatment in the plurality of adsorption treatment chambers therein, and performs a regeneration treatment on the taken-in adsorbent, an atmospheric carbon dioxide separation and recovery facility.

2. The total volume of the plurality of adsorption treatment chambers is larger than the volume of the regeneration treatment chamber. The atmospheric carbon dioxide separation and recovery facility according to Claim 1.

3. The plurality of adsorption treatment chambers are connected in parallel, Each adsorption treatment chamber discharges all of the adsorbent accommodated therein at staggered timings after the adsorption treatment is performed, The regeneration treatment chamber performs a regeneration treatment at one time on the same amount of adsorbent as the adsorbent discharged from each adsorption treatment chamber at staggered timings. The atmospheric carbon dioxide separation and recovery facility according to Claim 2.

4. The regeneration treatment chamber is located laterally as viewed from the plurality of adsorption treatment chambers. The atmospheric carbon dioxide separation and recovery facility according to Claim 3.

5. A regeneration treatment standby chamber having the same volume as the regeneration treatment chamber or a larger volume than the regeneration treatment chamber, and temporarily accommodating the adsorbent discharged from each adsorption treatment chamber. The atmospheric carbon dioxide separation and recovery facility according to Claim 3.

6. An adsorption treatment standby chamber having the same volume as each adsorption treatment chamber or a larger volume than each adsorption treatment chamber, and temporarily accommodating the adsorbent discharged from the regeneration treatment chamber. The atmospheric carbon dioxide separation and recovery facility according to Claim 3.

7. The plurality of adsorption treatment chambers each include: An inflow surface through which the atmosphere flows from the outside of the adsorption treatment chamber into the inside of the adsorption treatment chamber; An outflow surface through which the atmosphere flows out from the inside of the adsorption treatment chamber to the outside of the adsorption treatment chamber. The atmospheric carbon dioxide separation and recovery facility according to Claim 1.

8. The carbon dioxide separation and recovery facility in the atmosphere according to claim 7, comprising a plurality of suction devices that are located outside each adsorption treatment chamber and suck the atmosphere inside the adsorption treatment chamber through the outflow surface, thereby allowing the atmosphere to flow into the adsorption treatment chamber from the outside of the adsorption treatment chamber through the inflow surface.

9. The carbon dioxide separation and recovery facility in the atmosphere according to claim 7, wherein the distance from the inflow surface to the outflow surface is smaller than the vertical dimension and the width dimension of the inflow surface, and is smaller than the vertical dimension and the width dimension of the outflow surface.

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