JP7609767B2 - Carbon Dioxide Capture Equipment - Google Patents

Description

This disclosure relates to a carbon dioxide capture device.

Patent document 1 discloses a support structure that uses a flat partition plate with numerous slit holes through which gas passes to support granular filler packed in a packed tube in order to separate and react components in the gas.

JP 2004-255270 A

However, with the flat partition plate described above, when granular filler is placed on the slit holes, the slit holes are easily blocked by the granular filler, resulting in the problem of clogging of the partition plate by the granular filler.

One aspect of the present disclosure aims to provide a technology that suppresses clogging caused by granular filler.

One aspect of the present disclosure is a carbon dioxide capture device capable of capturing carbon dioxide contained in a gas, comprising a granular filler, a reaction vessel, and at least one support plate. The granular filler absorbs carbon dioxide. The reaction vessel is filled with the granular filler and gas passes through the inside. The at least one support plate is disposed within the reaction vessel and supports the granular filler. The at least one support plate has a plurality of ventilation holes and a plurality of protrusions. Gas passes through the plurality of ventilation holes. The plurality of protrusions protrude from the at least one support plate and are arranged in a staggered pattern.

In this configuration, the support plate has a three-dimensional shape due to the multiple protrusions. The multiple protrusions are arranged in a staggered pattern. This makes it easier for the granular filler to remain on the multiple protrusions, and the position at which the granular filler is stabilized on the support plate so that it abuts against the three protrusions is easily controlled by the three protrusions arranged in a triangular shape among the multiple protrusions. As a result, compared to a support plate that does not have multiple protrusions, for example a flat support plate, gaps are more likely to occur between the granular filler and the support plate, making it less likely for the multiple air holes in the support plate to be blocked. This makes it possible to suppress clogging of the support plate by the granular filler. As a result, the gas contact of the granular filler is more likely to improve, and a decrease in the utilization rate of the granular filler can be suppressed.

In one aspect of the present disclosure, the multiple ventilation holes may be arranged in the multiple protrusions and in a flat portion of at least one support plate where the multiple protrusions are not formed. With this configuration, the ventilation holes are arranged in various positions among the ventilation holes formed in the multiple protrusions and the ventilation holes formed in the flat portion, so that gas can easily flow through at least one of the ventilation holes at various positions even when the granular filler is supported by the support plate.

In one aspect of the present disclosure, the multiple protrusions may be arranged at intervals such that, when the granular filler is supported by three protrusions arranged in a triangular shape, there is a gap between the granular filler and a flat portion, which is a portion of at least one support plate where the multiple protrusions are not formed. With this configuration, when the granular filler is supported by three protrusions arranged in a triangular shape, a gap is formed between the flat portion and the granular filler, making it possible to make it difficult for the ventilation holes formed in at least the flat portion to be blocked.

In one aspect of the present disclosure, the at least one support plate may be a plurality of support plates arranged to divide the interior of the reaction vessel into a plurality of chambers aligned along the gas flow direction. The granular filler may be filled into each of the plurality of chambers. With this configuration, the granular filler is supported by each of the plurality of support plates, and the weight of the granular filler filled in the reaction vessel can be distributed by the plurality of support plates.

In one aspect of the present disclosure, the granular filler may be substantially spherical. In such a configuration, since the granular filler is substantially spherical, gaps are more likely to form when the granular filler contacts multiple protrusions and when the granular filler contacts each other, compared to, for example, rod-shaped granular filler. Therefore, it is easy to obtain the effect of suppressing clogging of multiple ventilation holes by the granular filler and maintaining breathability even when the filling density of the granular filler is high.

FIG. 1 is a schematic diagram of a carbon dioxide capture device. FIG. 2 is a cross-sectional view showing a schematic view of a tank filled with granular filler. FIG. 3A is a perspective view showing a schematic of a support plate, and FIG. 3B is a top view showing a schematic of a case in which the protrusions are arranged so that the diameter of the air hole is smaller than the diameter of an imaginary circle formed by connecting three points on the junctions between the planar portions of three protrusions arranged in a triangular shape. Figure 4A is an oblique view showing a schematic state in which granular filler is supported by the support plate shown in Figure 3A, and Figure 4B is a top view showing a schematic state in which granular filler is placed on top of the convex portion arranged as shown in Figure 3B. Figure 5A is a top view showing a schematic diagram of a granular filler being supported by the support plate shown in Figure 3A, Figure 5B is a schematic cross-sectional view taken along line VB-VB in Figure 5A, and Figure 5C is a schematic cross-sectional view taken along line VC-VC in Figure 5A. FIG. 2 is a top view showing a schematic diagram of a support plate having a triangular pyramidal convex portion. FIG. 7 is a top view showing a schematic diagram of a state in which granular filler is supported by the support plate shown in FIG. 6 . 13 is a diagram showing a schematic configuration in which ventilation holes are arranged on the side surface of a protrusion. FIG. FIG. 13 is a diagram illustrating a configuration in which a vent hole is disposed between two adjacent protrusions. FIG. 2 is a cross-sectional view showing a schematic diagram of a tank arranged sideways so that the central axis of the reaction vessel extends horizontally.

Hereinafter, exemplary embodiments of the present disclosure will be described with reference to the drawings.
[1. Configuration]
The carbon dioxide capture device 100 shown in Fig. 1 is a device for capturing and storing carbon dioxide in a combustion exhaust gas generated from an internal combustion engine such as a generator. The carbon dioxide capture device 100 can be used in various devices that generate combustion exhaust gas. The carbon dioxide capture device 100 includes a plurality of tanks 10 filled with granular filler 5 that absorbs carbon dioxide contained in the combustion exhaust gas. The granular filler 5 that absorbs carbon dioxide may be, for example, a granular solid that supports a liquid carbon dioxide absorbent of a compound that bonds with carbon dioxide, such as an amine, or may be a material formed into granules from a material that adsorbs carbon dioxide, such as activated carbon or zeolite.

In the carbon dioxide capture device 100, carbon dioxide is captured from the combustion exhaust gas through an absorption process, and then the absorbed carbon dioxide is desorbed through a desorption process and stored in a storage tank.
In the absorption step, as shown by the dotted line A1 in Fig. 1, the combustion exhaust gas G is introduced into the tank 10, and the combustion exhaust gas G is passed through the granular filler 5 to absorb the carbon dioxide in the combustion exhaust gas G. The treated exhaust gas after absorbing the carbon dioxide is discharged to the outside.

In the desorption process, the granular filler 5 is heated by a heating device (not shown), while carbon dioxide is desorbed from the granular filler 5 by a carrier gas such as water vapor introduced into the tank 10 from the carrier gas outlet 20 and a pump 30, as shown by dotted line A2 in FIG. 1. The desorbed carbon dioxide is stored in a storage tank (not shown). Note that the pressure inside the tank 10 drops during the desorption process, so after the desorption process, outside air is taken in to restore the pressure inside the tank 10, and the granular filler 5 is cooled by a cooling device (not shown) to the temperature it should be at in the absorption process.

As shown in FIG. 2 , the tank 10 includes a reaction vessel 1 , an outer shell 2 , a support plate 3 , a sub-support plate 4 , and a granular filler 5 .
The reaction vessel 1 is a cylindrical vessel in which the granular filler 5 is filled. In this embodiment, the term "filled" includes not only a state in which the granular filler 5 is filled to the fullest in the reaction vessel 1, but also a state in which the granular filler 5 is filled in the reaction vessel 1 with gaps, and the granular filler 5 is piled up on the support plate 3 described later. The reaction vessel 1 has an inlet 11 and an outlet 12 for the combustion exhaust gas G so that the combustion exhaust gas G passes through the inside. In this embodiment, the inlet 11 and the outlet 12 are arranged along the central axis A of the reaction vessel 1, and are provided so that the cross-sectional area perpendicular to the central axis A direction is smaller than that of the reaction vessel 1. In this embodiment, the reaction vessel 1 is arranged vertically so that the central axis A extends in the vertical direction, the inlet 11 is located below the reaction vessel 1, and the outlet 12 is located above the reaction vessel 1. As a result, the combustion exhaust gas G passes through the reaction vessel 1 from the bottom to the top. Note that the combustion exhaust gas G may be configured to pass through the reaction vessel 1 from the top to the bottom.

The outer shell 2 is disposed so as to surround a portion of the outer periphery of the reaction vessel 1, and both end portions in the direction of the central axis A are welded and fixed to the outer periphery of the reaction vessel 1 so as to form a space between the reaction vessel 1 and the outer shell 2. That is, the tank 10 has a double-tube structure comprising the reaction vessel 1 and the outer shell 2. In the following description, the wall of the reaction vessel 1 covered by the outer shell 2 is referred to as the inner wall 13. In the tank 10 with a double-tube structure, granular filler 5 is disposed in the area of the reaction vessel 1 covered by the outer shell 2.

The support plate 3 and the sub-support plate 4 are plate-shaped members arranged in the reaction vessel 1. In this embodiment, three support plates 3 and one sub-support plate 4 are arranged in the reaction vessel 1. The three support plates 3 and one sub-support plate 4 are arranged at a predetermined interval along the flow direction of the combustion exhaust gas G, i.e., the central axis A of the reaction vessel 1, perpendicular to the central axis A, and parallel to each other. In other words, the three support plates 3 and one sub-support plate 4 are arranged to extend horizontally so as to divide the inside of the reaction vessel 1 into a plurality of rooms arranged along the flow direction of the combustion exhaust gas G, i.e., the central axis A. The one sub-support plate 4 is arranged on the most downstream side in the flow direction of the combustion exhaust gas G, and in this embodiment, at the top. The tank 10 does not need to be provided with a sub-support plate 4.

The support plate 3 and the sub-support plate 4 have a flat plane portion 31 and a holding portion 32 provided on the edge of the plane portion 31. The holding portion 32 is formed to be thicker than the plane portion 31. The support plate 3 and the sub-support plate 4 are fixed to the reaction vessel 1 by disposing the holding portion 32 between the inner wall portion 13 and the outer shell portion 2 of the reaction vessel 1.

For example, the tank 10 may be formed by arranging the support plate 3 and the sub-support plate 4, in which the holding portion 32 and the flat portion 31 are integrally formed, between the respective parts of the reaction vessel 1 having a plurality of parts, and welding and fixing them in a combined state, and then welding and fixing the outer shell 2 to the reaction vessel 1 so as to cover the holding portion 32. Also, for example, the flat portion and the holding portion may be separate parts. In that case, the flat portion may be pierced through each of the holes of the reaction vessel having a plurality of holes formed in the inner wall portion, and then a holding portion larger than the plurality of holes may be attached to the edge of the flat portion from the outside of the reaction vessel, and then the outer shell 2 may be welded and fixed to the reaction vessel 1 so as to cover the holding portion 32, thereby fixing the support plate and the sub-support plate to the reaction vessel. Also, the inner wall portion of the reaction vessel and the flat portion and holding portion of the support plate and the sub-support plate may be formed integrally.

The granular filler 5 is filled into each of the multiple chambers in the reaction vessel 1 described above so that it is supported by each of the three support plates 3. In this embodiment, the support of the granular filler 5 includes not only the state in which the granular filler 5 is supported from below by the support plates 3, but also the state in which the granular filler 5 is supported from the side by, for example, sandwiching the granular filler 5 between two support plates 3. In this embodiment, the granular filler 5 is approximately spherical.

3A to 5C, the support plate 3 further has a plurality of protrusions 33 and a plurality of ventilation holes 34. It should be noted that the sub-support plate 4 only has a plurality of ventilation holes 34.
The multiple protrusions 33 are provided so as to protrude from the support plate 3. Specifically, the multiple protrusions 33 are provided so as to protrude from the upper surface of the support plate 3, i.e., the surface of the support plate 3 facing downstream with respect to the flow direction of the combustion exhaust gas G. In the following description, a portion of the support plate 3 on which the multiple protrusions 33 are not formed is referred to as a flat portion 31.

In this embodiment, the plurality of protrusions 33 have a hemispherical shape. As shown in Fig. 5B, the diameter d1 of each protrusion 33 is equal to or smaller than the diameter d2 of the granular filler 5.
As shown in Fig. 3A and Fig. 4A, the plurality of convex portions 33 are arranged in a staggered manner. In the present disclosure, the staggered arrangement means the following arrangement. That is, the plurality of convex portions 33 have a plurality of convex rows formed by convex portions arranged in a straight line along the X direction indicated by the arrow in Fig. 3A of the support plate 3 along the Y direction intersecting with the X direction, and the convex portions 33 are arranged alternately in adjacent convex rows among the plurality of convex rows. That is, the plurality of convex portions 33 are arranged alternately in each of the convex portions 33 arranged along a predetermined direction. In this embodiment, the vertices of three convex portions 33 arranged in a triangular shape among the plurality of convex portions 33 arranged in a staggered manner are arranged to form an equilateral triangle. Note that the vertices of three convex portions 33 arranged in a triangular shape may be arranged to form an isosceles triangle.

As shown in Figures 5A to 5C, the multiple protrusions 33 are arranged at intervals such that, with the granular filler 5 supported by the three protrusions 33 arranged in a triangular shape, there is a gap S1 between the flat surface 31 and the granular filler 5 as shown in Figure 5C. For example, the multiple protrusions 33 are arranged at intervals such that the diameter d3 of the imaginary circle C shown in Figure 3B formed by connecting the three points on the lowermost slopes of the three protrusions 33 arranged in a triangular shape, in other words, the intersections between the three protrusions 33 and the flat surface 31, is smaller than the diameter d2 of the granular filler 5.

The multiple ventilation holes 34 are formed in the support plate 3 and the sub-support plate 4, and are circular through-holes that penetrate the support plate 3 and the sub-support plate 4. The diameter d4 of the multiple ventilation holes 34 is equal to or smaller than the diameter d2 of the granular filler 5 so that the granular filler 5 does not fall out of the multiple ventilation holes 34.

As shown in Figures 3A to 4B, the multiple ventilation holes 34 formed in the support plate 3 are arranged in the multiple protrusions 33. In this embodiment, the multiple ventilation holes 34 are arranged at the vertices of the multiple protrusions 33. The multiple ventilation holes 34 formed in the support plate 3 are also arranged on the flat surface 31 of the support plate 3. In this embodiment, the multiple ventilation holes 34 are arranged between the three protrusions 33 arranged in a triangular shape on the flat surface 31 of the support plate 3, specifically at the center of a virtual triangle formed by connecting the vertices of the three protrusions 33.

As shown in Figures 5A to 5C, the first layer of the granular filler 5 is placed on the support plate 3 so that there is a gap S1 between the granular filler 5 and the flat portion 31. The second layer of granular filler 5 placed on top of it is likely to be supported by the three granular fillers 5 of the first layer arranged in a triangular shape so that there is a gap S2 shown in Figure 5B between the convex portion 33 and the granular filler 5 of the second layer. That is, in the support plate 3 of this embodiment, the granular filler 5 is likely to be arranged in a face-centered cubic lattice shape. Therefore, even when the granular filler 5 is supported on the support plate 3 with a high packing density, the air permeability can be improved through the gaps S1 and S2. As a result, the combustion exhaust gas G can easily pass through the multiple ventilation holes 34, and clogging of the support plate 3 by the granular filler 5 is suppressed. In addition, the combustion exhaust gas G that passes through the multiple ventilation holes 34 can easily pass between the piled up granular filler 5, which improves contact between the granular filler 5 and the combustion exhaust gas G, thereby preventing a decrease in the utilization rate of the granular filler 5.

2. Effects
According to the embodiment described above in detail, the following effects can be obtained.
(2a) In this embodiment, the support plate 3 has a three-dimensional shape due to a plurality of protruding portions 33 protruding from the flat portion 31 of the support plate 3. The plurality of protruding portions 33 are arranged in a staggered pattern, and a plurality of air holes 34 are arranged at the apexes of the plurality of protruding portions 33 and at the flat portion 31 of the support plate 3. For this reason, the granular filler 5 can easily rest on the plurality of protruding portions 33, and the position on the support plate 3 where the granular filler 5 rests can easily be controlled by three of the plurality of protruding portions 33 arranged in a triangular shape so that the granular filler 5 abuts against the side surfaces of the three protruding portions 33.

The multiple protrusions 33 are also spaced apart so that there is a gap S1 between the flat surface 31 and the granular filler 5, with the granular filler 5 supported by three of the triangularly arranged protrusions 33. This allows the first layer of granular filler 5 placed on the support plate 3 to be supported by the support plate 3 so that there is a gap S1 between the flat surface 31, and the second layer of granular filler 5 placed on top of that is easily supported by the support plate 3 so that there is a gap S2 between the protrusions 33.

Therefore, even when the granular filler 5 is placed on the support plate 3, the combustion exhaust gas G easily passes through the gap S1 from the multiple ventilation holes 34 arranged on the flat surface portion 31, and the combustion exhaust gas G easily passes through the multiple ventilation holes 34 arranged on the multiple protrusions 33 through the gap S2. As a result, the multiple ventilation holes 34 of the support plate 3 are less likely to be blocked, so clogging of the support plate 3 by the granular filler 5 can be suppressed. In other words, even when the granular filler 5 is supported on the support plate 3 with a high packing density, the ventilation can be improved through the gaps S1 and S2. In addition, the combustion exhaust gas G that has passed through the multiple ventilation holes 34 easily passes between the piled up granular filler 5, so the contact of the granular filler 5 with the combustion exhaust gas G is easily improved, and the utilization rate of the granular filler 5 can be suppressed from decreasing.

(2b) In this embodiment, three support plates 3 are arranged to divide the interior of the vertically oriented reaction vessel 1 into multiple chambers aligned along the central axis A. As a result, the granular filler 5 can be supported from below by each of the three support plates 3, and the weight of the granular filler 5 filled in the reaction vessel 1 can be distributed among the three support plates 3. This makes it possible to prevent the granular filler 5 on the lower side from cracking due to its own weight, even when the reaction vessel 1 is filled with the granular filler 5 at a high density.

(2c) In this embodiment, since the granular filler 5 is substantially spherical, gaps are more likely to form when the granular filler 5 comes into contact with the multiple protrusions 33 and when the granular filler 5 comes into contact with each other, compared to, for example, rod-shaped granular filler. Therefore, clogging of the multiple ventilation holes 34 by the granular filler 5 is suppressed, and the effect of maintaining breathability even when the filling density of the granular filler 5 is high is easily obtained.

(2d) In this embodiment, the inlet 11 and outlet 12 in the reaction vessel 1 are arranged along the central axis A of the reaction vessel 1. Therefore, compared to a configuration in which the inlet 11 and outlet 12 are not arranged along the central axis A, it is possible to reduce bias in the flow of the combustion exhaust gas G. In addition, it is easier to control the flow of the combustion exhaust gas G passing through the support plate 3.

(2e) In this embodiment, the tank 10 has a double-tube structure including the reaction vessel 1 and the outer shell 2, making it less susceptible to heat from the outside. In addition, in this embodiment, the granular filler 5 is disposed in the area of the reaction vessel 1 that is covered by the outer shell 2, making it easier to control the temperature of the tank 10 for the absorption and desorption processes carried out within the tank 10.

3. Other embodiments
Although the embodiments of the present disclosure have been described above, it goes without saying that the present disclosure is not limited to the above-described embodiments and can take various forms.

(3a) In the above embodiment, a configuration in which multiple hemispherical convex portions 33 are provided on the support plate 3 is exemplified, but the shape of the convex portion is not limited to this. For example, as in the support plate 3a shown in Figures 6 and 7, the multiple convex portions 33a may have a triangular pyramid shape. The multiple convex portions 33a are arranged in a staggered pattern. The support plate 3a has multiple ventilation holes 34a arranged on the planar portion 31a, and the multiple ventilation holes 34a are arranged in a range surrounded by three of the multiple convex portions 33a. Although not shown in the figure, the multiple ventilation holes 34a may be arranged at the apexes of the multiple convex portions 33a or on any side of the triangular pyramid. In the case of the support plate 3a, as shown in FIG. 7, the granular filler 5 is supported by three triangularly arranged convex portions 33a so as to have gaps between the support plate 3a and the convex portions 33a, and the second layer of granular filler 5 is supported on the three triangularly arranged granular filler 5 so as to have gaps between the convex portions 33a and the second layer of granular filler 5. Therefore, the same effect as the support plate 3 of the present embodiment described above can be obtained.

(3b) In the above embodiment, a configuration in which multiple air vents 34 are arranged on multiple protrusions 33 and on the flat surface 31 of the support plate 3 is illustrated, but the arrangement of the multiple air vents is not limited to this. For example, the multiple air vents may be arranged on only one of the multiple protrusions or the flat surface of the support plate.

(3c) In the above embodiment, the ventilation hole 34 arranged in the convex portion 33 is arranged at the apex of the convex portion 33, but the position of the ventilation hole in the convex portion is not limited to this. For example, as in the ventilation hole 34b shown in FIG. 8, the ventilation hole may be arranged on a surface other than the apex of the convex portion 33b, i.e., on the side surface. In addition to the ventilation hole 34 arranged at the apex of the convex portion 33b, the ventilation hole 34b arranged on the side surface of the convex portion 33b may be arranged in the convex portion 33b. In addition, in the convex portion 33b, only the ventilation hole 34b arranged on the side surface of the convex portion 33b may be arranged. In addition, the ventilation hole may be a shape other than a circle, for example, the ventilation hole may be a square shape.

(3d) In the above embodiment, the ventilation holes 34 arranged on the planar portion 31 of the support plate 3 are arranged between the three convex portions 33 arranged in a triangular shape, but the position of the ventilation holes on the planar portion is not limited to this. For example, as with the ventilation hole 34c shown in FIG. 9, the ventilation holes 34 may be arranged between two adjacent convex portions 33c. In addition to the ventilation holes 34 arranged between the three convex portions 33 arranged in a triangular shape on the planar portion 31, ventilation holes 34c arranged between two adjacent convex portions 33c may also be arranged. Also, only the ventilation holes 34c arranged between the two adjacent convex portions 33c may be arranged on the planar portion 31.

(3e) In the above embodiment, the reaction vessel 1 is arranged vertically so that the central axis A extends vertically, but the orientation in which the reaction vessel is arranged is not limited to this. For example, as in the tank 10d shown in FIG. 10, the reaction vessel 1d may be arranged horizontally so that the central axis Ad extends horizontally. As a result, the combustion exhaust gas G passes through the reaction vessel 1d in the left-right direction. In the reaction vessel 1d arranged horizontally in this manner, a plurality of convex portions 33 are provided so as to protrude from the surface of the support plate 3 arranged in the reaction vessel 1d facing downstream with respect to the flow direction of the combustion exhaust gas G, that is, from the right side surface in the example shown in FIG. 10. That is, in the above embodiment, the configuration in which the granular filler 5 is supported from below by the support plate 3 is exemplified, but the method of supporting the granular filler is not limited to this. For example, the granular filler 5 may be supported laterally by the support plate 3 arranged in the reaction vessel 1d arranged horizontally as described above.

(3f) In the above embodiment, the inlet 11 and outlet 12 are arranged along the central axis A of the reaction vessel 1, but the inlet and outlet in the reaction vessel do not have to be arranged along the central axis A of the reaction vessel.

(3g) In the above embodiment, the tank 10 has a double-pipe structure including the reaction vessel 1 and the outer shell 2. However, the tank does not have to have a double-pipe structure.
(3h) In the above embodiment, a configuration in which three support plates 3 are arranged in the reaction vessel 1 is exemplified, but the number of support plates arranged in the reaction vessel 1 is not limited to this. For example, one, two, or four or more support plates may be arranged.

(3i) In the above embodiment, the granular filler 5 has a substantially spherical shape, but the shape of the granular filler is not limited to this. The granular filler may have various shapes.
(3j) The function of one component in the above embodiments may be distributed as multiple components, or the functions of multiple components may be integrated into one component. In addition, a part of the configuration of the above embodiments may be omitted. In addition, at least a part of the configuration of the above embodiments may be added to, replaced with, or the like for the configuration of another of the above embodiments. Note that any aspect included in the technical idea specified by the wording described in the claims is an embodiment of the present disclosure.

1, 1d... reaction vessel, 2... outer shell, 3, 3a... support plate, 4... sub-support plate, 5... granular filler, 10, 10d... tank, 11... inlet, 12... outlet, 13... inner wall, 20... carrier gas outlet, 30... pump, 31, 31a... flat surface, 32... holding portion, 33, 33a to 33c... convex portion, 34, 34a to 34c... vent, 100... carbon dioxide capture device, A, Ad... central axis, A1, A2... dotted line, C... imaginary circle, G... combustion exhaust gas, S1, S2... gap.

Claims (4)

A carbon dioxide capture device capable of capturing carbon dioxide contained in a gas,
A granular filler that absorbs carbon dioxide;
a reaction vessel filled with the granular filler and through which a gas passes;
At least one support plate disposed within the reaction vessel and supporting the granular filler;
Equipped with
The at least one support plate has a plurality of ventilation holes through which gas passes and a plurality of protrusions protruding from the at least one support plate,
The plurality of protrusions are arranged in a staggered pattern ,
A carbon dioxide capture device in which the multiple convex portions are arranged at intervals such that there is a gap between the granular filler and a flat portion of the at least one support plate where the multiple convex portions are not formed, with the granular filler supported by three convex portions arranged in a triangular shape . The carbon dioxide capture device according to claim 1,
The carbon dioxide capture device, wherein the plurality of ventilation holes are arranged in the plurality of convex portions and in a flat portion of the at least one support plate that is a portion where the plurality of convex portions are not formed. The carbon dioxide capture device according to claim 1 or 2 ,
The at least one support plate is a plurality of support plates arranged so as to divide the inside of the reaction vessel into a plurality of chambers arranged along a gas flow direction,
The carbon dioxide capture apparatus, wherein the granular filler is filled into each of the plurality of chambers. The carbon dioxide capture device according to any one of claims 1 to 3 ,
The carbon dioxide capture device, wherein the granular filler is substantially spherical.

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