Carbon dioxide recovery apparatus

Abstract

To provide a carbon dioxide recovery apparatus which can increase efficiency of attachment / detachment work of an adsorbent holder that holds an adsorbent and can achieve high thermal efficiency.SOLUTION: A carbon dioxide recovery apparatus 1 includes: heat exchangers (adsorbent holders) 70 holding an adsorbent 12; support plates (support members) 80 each having a first receiving portion 81 and a second receiving portion 82 into which the heat exchangers 70 may be slidably inserted; and seal portions 75 which are disposed on the heat exchangers 70 and deformed following the first receiving portion 81 and the second receiving portion 82 when the heat exchangers 70 are slidably inserted into the first receiving portion 81 and the second receiving portion 82. The heat exchangers 70 are supported by the support plate 80 via the seal portions 75.SELECTED DRAWING: Figure 5

Description

[Technical Field]

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

[0002] Conventionally, techniques for recovering carbon dioxide from gases containing carbon dioxide, such as the atmosphere, have been known. Patent Document 1, for example, describes this type of technique. For example, Patent Document 1 shows that an adsorbent that adsorbs carbon dioxide is arranged in multiple layers on an adsorbent holding member. Patent Document 2 describes a method for separating gaseous carbon dioxide from a gas mixture by cyclic adsorption / desorption using an adsorbent that adsorbs gaseous carbon dioxide. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] US Patent Application Publication No. 2019 / 0255480 [Patent Document 2] Special Publication No. 2017-528318 Summary of the Invention [Problem to be solved by the invention]

[0004] In a configuration in which a heat exchanger that heats and cools the adsorbent is used as the adsorbent holder, the heat exchanger must be removed from the housing to replace the adsorbent. Removing the heat exchanger requires removing not only the heat exchanger itself but also other assembled components. Furthermore, in a configuration in which multiple heat exchangers with adsorbents are housed vertically, the heat exchangers must be set into the housing one layer at a time, starting from the bottom. Thus, the process of installing and removing the heat exchangers is extremely time-consuming.

[0005] Furthermore, heat exchangers are often constructed using brazed aluminum parts, which results in large dimensional tolerances. Larger dimensional errors result in larger gaps between the housing and the heat exchanger. These gaps can reduce the amount of air passing through the adsorbent, potentially resulting in a lower carbon dioxide capture rate.

[0006] An object of the present invention is to provide a carbon dioxide capture device that can efficiently attach and detach an adsorbent holding section that holds an adsorbent, and that can achieve high thermal efficiency. [Means for solving the problem]

[0007] (1) The present invention is a carbon dioxide capture device (for example, carbon dioxide capture device 1 described later) comprising an adsorbent holding section (for example, heat exchanger 70 described later) that holds an adsorbent (for example, adsorbent 12 described later), a support member (for example, support plate 80 described later) having accommodation sections (for example, first accommodation section 81 and second accommodation section 82 described later) into which the adsorbent holding section can be slidably inserted, and a seal section (for example, seal section 75 described later) that is disposed on the adsorbent holding section and deforms in accordance with the sliding insertion of the adsorbent holding section into the accommodation section, wherein the adsorbent holding section is supported by the support member via the seal section.

[0008] (2) In the carbon dioxide capture device described in (1) above, the sealing portion may be made of a foaming material.

[0009] (3) In the carbon dioxide capture device described in (1) or (2) above, the storage section may have a first storage section that stores the adsorbent holding section, and a second storage section (e.g., second storage section 82 described later) that is located adjacent to the first storage section (e.g., first storage section 81 described later) and stores the adsorbent holding section different from the adsorbent holding section stored in the first storage section, and may further include a guide member (e.g., guide member 90 described later) that is inserted between the adsorbent holding section stored in the first storage section and the adsorbent holding section stored in the second storage section and presses the seal section (e.g., seal section 75 described later) of each of the adsorbent holding sections.

[0010] (4) In the carbon dioxide capture device described in (3) above, the first storage section may be inclined so that the tip side in the insertion direction of the adsorbent holding section is closer to the second storage section than the base end side, the second storage section may be inclined so that the tip side in the insertion direction is closer to the first storage section than the base end side, and the guide member may be formed so that the tip in the insertion direction is wedge-shaped.

[0011] (5) The carbon dioxide recovery device described in (1) or (2) above may further include a header through which a heat transfer medium flows (for example, header 110 described later), a pipe (for example, pipe flange 120 described later) that connects the inside of the adsorbent holding portion with the inside of the header and allows the heat transfer medium to flow through the adsorbent holding portion, and an insulating material (for example, O-ring 122 described later) that is arranged between the adsorbent holding portion and the pipe.

[0012] (6) The carbon dioxide recovery device described in (1) or (2) above may include a housing (for example, housing 50 described later) to which the support member is fixed, a header (for example, header 110 described later) arranged on the outside of the housing and through which a heat transfer medium flows, a cylindrical portion (for example, cylindrical portion 121 described later) that penetrates the housing and connects the inside of the adsorbent holding portion to the inside of the header, a flange portion (for example, flange portion 125 described later) arranged on the cylindrical portion and located between the header and the housing, and a heat insulating material (for example, O-ring 126 and O-ring 127 described later) arranged at least either between the flange portion and the housing or between the flange portion and the header.

[0013] (7) In the carbon dioxide recovery device described in (1) or (2) above, the adsorbent holding section (for example, the heat exchanger 70 described later) may have a heat insulating material (79) arranged on at least a portion of its surface.

[0014] (8) In the carbon dioxide recovery device described in (1) or (2) above, the adsorbent holding section (e.g., the heat exchanger 70 described later) may have a heat insulating material (79) arranged on all surfaces except for the area in contact with the adsorbent. [Effects of the Invention]

[0015] According to the present invention, it is possible to provide a carbon dioxide capture device that can efficiently attach and detach an adsorbent holding section that holds an adsorbent, and that can achieve high thermal efficiency. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a schematic diagram showing the configuration of a carbon dioxide capture device according to an embodiment of the present invention. [Figure 2] FIG. 2 is a perspective view showing the appearance of a housing of the carbon dioxide capture device of the present embodiment. [Figure 3] FIG. 2 is a perspective view showing the appearance of the housing of the carbon dioxide capture device of the present embodiment with the intake section removed. [Figure 4] FIG. 2 is a perspective view showing the appearance of the housing of the carbon dioxide recovery device of the present embodiment with the heat exchanger pulled out. [Figure 5] FIG. 2 is a perspective view showing a support plate on which a heat exchanger can be set inside the housing of the carbon dioxide capture device of the present embodiment. [Figure 6] FIG. 2 is a side view showing the inner surface of the support plate of the carbon dioxide capture device of the present embodiment. [Figure 7] FIG. 2 is a perspective view of a heat exchanger of the carbon dioxide recovery device of the present embodiment. [Figure 8] FIG. 2 is a schematic diagram showing how a heat exchanger is housed in a support plate of the carbon dioxide capture device of the present embodiment. [Figure 9] FIG. 4 is a perspective view showing a guide member inserted into the support plate of the carbon dioxide capture device of the present embodiment. [Figure 10] 3 is a schematic diagram showing a state in which a heat exchanger and a guide member are housed in a support plate of the carbon dioxide capture device of the present embodiment. FIG. [Figure 11]10 is a perspective view showing the fixing of the guide member after the support plate of the carbon dioxide capture device of the present embodiment is inserted. FIG. [Figure 12] FIG. 2 is a schematic diagram showing a connection structure between a heat exchanger and a header of the carbon dioxide recovery device of the present embodiment. [Figure 13] FIG. 2 is an enlarged view of a portion of the heat exchanger. [Figure 14] FIG. 10 is a diagram showing a state in which a heat insulating material is provided in the heat exchange body of the heat exchanger. DETAILED DESCRIPTION OF THE INVENTION

[0017] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0018] (First embodiment) <Overall structure> Fig. 1 is a schematic diagram showing the configuration of a carbon dioxide capture apparatus 1 according to one embodiment of the present invention. The carbon dioxide capture apparatus 1 is applied to, for example, direct air capture (DAC) technology that captures carbon dioxide from the atmosphere in order to reduce the carbon dioxide concentration in the atmosphere. The carbon dioxide captured by the carbon dioxide capture apparatus 1 is stored underground or reused as fuel or material.

[0019] As shown in FIG. 1, the carbon dioxide capture device 1 includes a housing 10, an intake section 20, an exhaust section 30, a capture line 40, a capture valve 41, and a vacuum pump .

[0020] The housing 10 houses a heat exchanger 70. The heat exchanger 70 is a radiator with fins formed on its outer surface and a flow path formed inside through which a heat medium flows. A heat medium with a temperature potential corresponding to the process of the housing 10 is introduced into the heat exchanger 70. The heat medium is introduced into the heat exchanger 70 inside the housing 10 via an inlet line 2, undergoes heat exchange inside the heat exchanger 70, and then is returned to the outside of the housing 10 via an outlet line 3. When a desorption process is performed, a high-temperature heat medium is supplied to the heat exchanger 70 to heat the adsorbent 12, and the adsorbent 12 is heated. When an adsorption process is performed, a low-temperature heat medium is supplied to the heat exchanger 70 to cool the adsorbent 12.

[0021] The adsorbent 12 is placed in a heat exchanger 70. In this embodiment, the adsorbent 12 is filled between fins formed on the outer surface of the heat exchanger 70, and the heat exchanger 70 functions as an adsorbent holding section. The adsorbent 12 is heated or cooled by exchanging heat with a heat medium flowing through a flow path inside the heat exchanger 70.

[0022] The adsorbent 12 is a particulate material that adsorbs carbon dioxide at low temperatures (for example, in the range of -30°C to 50°C) and desorbs (releases) carbon dioxide at high temperatures (for example, in the range of 50°C to 110°C) when the ambient carbon dioxide concentration is low. Examples of such adsorbent 12 include solid amine carbon dioxide adsorbents formed by supporting amine on a porous material such as silica.

[0023] The housing 10 alternately performs an adsorption process in which carbon dioxide in a gas such as the inhaled atmosphere is adsorbed by the adsorbent 12, and a desorption process in which the carbon dioxide adsorbed by the adsorbent 12 is desorbed by creating a vacuum and then heating under reduced pressure.

[0024] The intake unit 20 introduces air containing carbon dioxide into the inside of the housing 10. The intake valve 21 is controlled to be in an open state during the adsorption process, and is controlled to be in a closed state during the desorption process.

[0025] The exhaust unit 30 is introduced into the interior during the adsorption process and sends the air after carbon dioxide has been captured by the adsorbent 12 to the outside of the housing 10. The exhaust unit 30 has an exhaust valve 31. The exhaust valve 31 is controlled to an open state during the adsorption process and to a closed state during the desorption process.

[0026] The recovery line 40 is a pipe connected to the exhaust unit 30 and sends the carbon dioxide desorbed from the adsorbent 12 in the desorption step to a carbon dioxide tank (not shown). Note that the recovery line 40 is not limited to being connected to the exhaust unit 30, and may be connected to the intake unit 20, for example.

[0027] The recovery valve 41 is disposed at the connection between the recovery line 40 and the housing 10. The recovery valve 41 is controlled to an open state that connects the recovery line 40 to the inside of the housing 10 during the desorption process in which carbon dioxide is recovered, and is controlled to a closed state that isolates the recovery line 40 from the inside of the housing 10 during the adsorption process.

[0028] The vacuum pump 42 is disposed on the recovery line 40. By driving the vacuum pump 42, the carbon dioxide desorbed in the desorption step of the casing 10 is recovered through the recovery line 40 into a carbon dioxide tank (not shown).

[0029] <Heat exchanger detachable structure> Next, a description will be given of the structure for attaching and detaching the heat exchanger to the housing 10. Fig. 2 is a perspective view showing the appearance of the housing 10 of the carbon dioxide recovery device 1 of this embodiment. In the following description, for convenience, the longitudinal direction of the heat exchanger 70 and the longitudinal direction of the housing 50 will be described as the left-right direction.

[0030] The housing 10 has a housing 50 that houses a heat exchanger 70. The heat exchanger 70 is configured to be detachable from the housing 50. Two headers 110 are arranged in the housing 50 to circulate a heat medium through the heat exchanger 70. An inlet line 2 (not shown in FIG. 2) is connected to one of the two arranged headers 110, and an outlet line 3 (not shown in FIG. 2) is connected to the other.

[0031] FIG. 3 is a perspective view showing the exterior of the housing 10 of the carbon dioxide recovery device 1 of this embodiment with the intake unit 20 removed. As shown in FIG. 3, the housing 10 includes stays 52, vertical covers 53, and horizontal covers 54 as fixing members for fixing the heat exchanger 70 housed in the housing 50. The stays 52 are strip-shaped members extending in the vertical direction, and a total of three stays are arranged in the center and on both sides in the horizontal direction. The vertical covers 53 are fastened to the stays 52 on both sides with bolts or the like, and cover the left and right ends of the heat exchanger 70. The horizontal covers 54 are fastened to the stays 52 and vertical covers 53 with bolts or the like, and cover the pull-out side of the heat exchanger 70. When the stays 52, vertical covers 53, and horizontal covers 54 are removed from the state shown in FIG. 3 and the heat exchanger 70 is then removed, the state shown in FIG. 4 is obtained.

[0032] Fig. 4 is a perspective view showing the appearance of the housing 10 with the heat exchanger 70 of the carbon dioxide recovery apparatus 1 of this embodiment pulled out. Fig. 5 is a perspective view showing a support plate 80 that supports the heat exchanger 70 and allows it to be set inside the housing 50 of the carbon dioxide recovery apparatus 1 of this embodiment. Fig. 6 is a side view showing the inner surface of the support plate 80 of the carbon dioxide recovery apparatus 1 of this embodiment. Fig. 7 is a perspective view of the heat exchanger 70 of the carbon dioxide recovery apparatus 1 of this embodiment.

[0033] 4 and 5 show a state in which the heat exchanger 70 set on the support plate 80 has been pulled out. For convenience in the following description, the pulled-out side may be referred to as the front side.

[0034] In this embodiment, the heat exchanger 70 can be pulled out from the housing 50 by removing the intake section 20, the stays 52, the vertical cover 53, and the horizontal cover 54. This makes it possible to remove the heat exchanger 70 and replace the adsorbent 12 while maintaining the assembled state of the components of the carbon dioxide recovery device 1 other than the heat exchanger 70.

[0035] As shown in Fig. 5, the support plates 80 are disposed on both the left and right sides of the heat exchanger 70. As shown in Fig. 6, the support plate 80 is formed with a first accommodating portion 81, a second accommodating portion 82, a guide insertion portion 83, a connection through hole 84, and a connection notch 85.

[0036] The first receiving portion 81 and the second receiving portion 82 are both recesses formed on the inner surface of the support plate 80. The first receiving portion 81 and the second receiving portion 82 are arranged in pairs above and below.

[0037] The first accommodating sections 81 and second accommodating sections 82 are arranged in a comb shape corresponding to the number of accommodated heat exchangers 70. In the example of Fig. 6, five pairs of first accommodating sections 81 and second accommodating sections 82 are lined up in the vertical direction, and the support plate 80 is configured to be able to accommodate a total of ten heat exchangers 70.

[0038] The first housing section 81 is inclined so that the entrance side of the housing 50 is higher and the back side is lower in a side view. The inclination of the first housing section 81 is set so that the entrance side is inclined upward by about 2.5 degrees with respect to the horizontal. The second housing section 82 is inclined so that the entrance side of the housing 50 is lower and the back side is higher in a side view. The inclination of the second housing section 82 is set so that the entrance side is inclined downward by about 2.5 degrees with respect to the horizontal. The first housing section 81 and the second housing section 82 are arranged in a roughly V-shape with a narrow gap at the tip end side in the insertion direction and a wide gap at the base end side in the insertion direction.

[0039] The guide insertion portion 83 is a recess formed between the first accommodating portion 81 and the second accommodating portion 82. A guide member 90, which will be described later, is inserted into the guide insertion portion 83. Although the depth of the recess of the guide insertion portion 83 is shallower than the depths of the recesses of the first accommodating portion 81 and the second accommodating portion 82, the guide insertion portion 83 is adjacent to the first accommodating portion 81 and the second accommodating portion 82 without any separation.

[0040] The connection through-holes 84 are formed on the leading end side in the insertion direction of each of the first accommodating portion 81 and the second accommodating portion 82. The connection through-holes 84 are communication holes for connecting a flow path connection portion 73 formed on the leading end side in the insertion direction of the heat exchanger 70, which will be described later, to the header 110.

[0041] The connection notch 85 is formed on the base end side (front side) in the insertion direction of each of the first accommodating portion 81 and the second accommodating portion 82. The connection notch 85 is a communication notch for connecting a flow path connecting portion 73 formed on the base end side in the insertion direction of the heat exchanger 70, which will be described later, to the header 110.

[0042] As shown in FIG. 7, a heat exchanger 70 of this embodiment includes a heat exchange body 71, an insertion portion 72, a flow path connecting portion 73, and a seal portion 75.

[0043] The heat exchanger body 71 has a flow path through which a heat medium flows inside the heat exchanger body 71. The heat exchanger body 71 of this embodiment is formed in a substantially rectangular parallelepiped shape.

[0044] The insertion portions 72 are formed on both sides of the heat exchanger main body 71. They are portions to be inserted into the first storage portion 81 or the second storage portion .

[0045] The flow path connecting portion 73 is a connection hole for connecting a flow path formed inside the heat exchanger body 71 to a flow path connected to the header 110. The flow path connecting portion 73 is formed on each end surface of the insertion portion 72 on both the left and right sides.

[0046] The position of the flow path connection portion 73 differs between the left and right insertion portions 72. The difference in position will be described by assuming that the flow path connection portion 73 formed in the insertion portion 72 located on the right side of the paper in Fig. 7 is flow path connection portion 73a, and the flow path connection portion 73 formed in the insertion portion 72 located on the left side of the paper is flow path connection portion 73b.

[0047] The flow path connecting portion 73a is located on the tip side of the insertion portion 72 in the insertion direction. When the heat exchanger 70 is housed in the first housing portion 81 or the second housing portion 82, the flow path connecting portion 73a is connected to the header 110 through the above-mentioned connection through-hole 84 (see FIG. 12). On the other hand, the flow path connecting portion 73b is located on the base end side in the insertion direction. When the heat exchanger 70 is housed in the first housing portion 81 or the second housing portion 82, the flow path connecting portion 73b is connected to the header 110 through the above-mentioned connection notch 85 (see FIGS. 9 and 11).

[0048] The seal portion 75 is made of a material that is compressible and capable of conforming to deformation. The material that makes up the seal portion 75 is, for example, a foamed porous material such as urethane foam. The bubbles contained inside the seal portion 75 can suppress heat transfer from the heat exchanger 70 to the support plate 80. The bubbles contained in the seal portion 75 can also provide a buffering function, thereby making it possible to more stabilize the position of the heat exchanger 70 on the support plate 80. Note that by using a foamed material, particularly a micro-foamed material, as the material that makes up the seal portion 75, deformation of the seal portion 75 under reduced pressure during the removal process can also be suppressed.

[0049] FIG. 8 is a schematic diagram showing how the heat exchanger 70 is accommodated in the support plate 80 of the carbon dioxide recovery device 1 of this embodiment. FIG. 8 shows how the heat exchanger 70 is accommodated in each of the first accommodation section 81 and the second accommodation section 82 of the support plate 80. Because the first accommodation section 81 is inclined, the heat exchanger 70 is inserted into the first accommodation section 81 with its leading end in the insertion direction tilted downward by approximately 2.5 degrees. During this insertion process, the seal portion 75 arranged in the insertion section 72 of the heat exchanger 70 deforms to follow the shape of the inner wall of the first accommodation section 81. Because the second accommodation section 82 is also inclined, the heat exchanger 70 is inserted into the first accommodation section 81 with its leading end in the insertion direction tilted upward by approximately 2.5 degrees. During this insertion process, the seal portion 75 arranged in the insertion section 72 of the heat exchanger 70 deforms to follow the shape of the inner wall of the second accommodation section 82.

[0050] Furthermore, in the carbon dioxide capture device 1 of this embodiment, guide members 90 are used to fix the accommodation state of the two heat exchangers 70 accommodated in the first accommodation section 81 and the second accommodation section 82. The guide members 90 are inserted between the first accommodation section 81 and the second accommodation section 82 of the support plate 80. The guide members 90 are arranged on both the left and right sides, and therefore a total of 10 guide members 90 are used in this embodiment.

[0051] Fig. 9 is a perspective view showing a guide member 90 inserted into the support plate 80 of the carbon dioxide recovery device 1 of this embodiment. As shown in Fig. 9, the guide member 90 is inserted into the support plate 80 in a state in which the heat exchanger 70 is housed in each of the first housing section 81 and the second housing section 82.

[0052] 9, the guide member 90 is formed into a generally T-shape overall. The guide member 90 includes an insertion portion 91 extending in the insertion direction, a base end portion 92 extending in a direction perpendicular to the insertion direction at the base end side of the insertion portion 91, and a bolt fastening portion 93 disposed on the insertion side relative to the base end portion 92.

[0053] The insertion portion 91 is formed in a wedge shape tapering toward the tip. In this embodiment, the insertion portion 91 is made of resin, so the surface that is positioned on the outside when the support plate 80 is inserted is lightened, but if the insertion portion 91 is made of metal, it does not have to be lightened.

[0054] Fig. 10 is a schematic diagram showing a state in which the heat exchanger 70 and the guide member 90 are housed in the support plate 80 of the carbon dioxide recovery device 1 of this embodiment. As shown in Fig. 10, the insertion portion 91 is inserted between the heat exchanger 70 of the first housing portion 81 and the heat exchanger 70 of the second housing portion 82. During this insertion process, the seal portions 75 of the heat exchanger 70 are pressed against the insertion portion 91 and deformed accordingly.

[0055] In the inserted state, the base end 92 faces the front side of the heat exchanger 70 inserted in the first accommodating portion 81, and also faces the front side of the heat exchanger 70 inserted in the second accommodating portion 82. As a result, the base end 92 applies a force to push the heat exchangers 70 accommodated in the first accommodating portion 81 and the second accommodating portion 82 in the insertion direction during the insertion process.

[0056] When the guide member 90 is inserted, the heat exchanger 70 in the first storage section 81 undergoes deformation as its seal portion 75 is sandwiched between the inner wall of the first storage section 81 and the guide member 90, thereby closing the gap between the heat exchanger 70 and the support plate 80. Similarly, the heat exchanger 70 in the second storage section 82 undergoes deformation as its seal portion 75 is sandwiched between the inner wall of the second storage section 82 and the guide member 90, thereby closing the gap between the heat exchanger 70 and the support plate 80. In this manner, the foamed resin seal portion 75 collapses, thereby sealing the gap between the heat exchanger 70 and the support plate 80. In the stored state, the seal portion 75 is subjected to a restraining force by the first storage section 81, the second storage section 82, and the guide member 90, as indicated by the white arrows. In this manner, the carbon dioxide capture device 1 has a floating structure in which the heat exchanger 70 is supported by the support plate 80 and the guide member 90 via the seal portion 75.

[0057] 9, the bolt fastening portion 93 will be described. The bolt fastening portion 93 is located on the central axis of the insertion portion 91, and a fixing plate 95 for fixing the position of the guide member 90 is fastened to the bolt fastening portion 93 via a fastening member 96.

[0058] The fixing plate 95 has a first surface 951 facing the insertion direction of the guide member 90, and a second surface 952 that is perpendicular to the first surface 951 and faces the inner surface of the housing 50. The fastening member 96 is formed of, for example, a bolt and a washer, and fastens and fixes one surface of the fixing plate 95 to the guide member 90 in the insertion direction.

[0059] 11 is a perspective view showing the fixing of the guide member 90 after inserting the support plate 80 of the carbon dioxide recovery device 1 of this embodiment. As shown in Fig. 11, in a state in which the guide member 90 is inserted between the heat exchanger 70 of the first storage section 81 and the heat exchanger 70 of the second storage section 82, the guide member 90 is fixed to the housing 50 side.

[0060] In this embodiment, the guide member 90 is fixed to the housing 50 via a fixing plate 95 fixed to the guide member 90. A second surface 952 of the fixing plate 95 is fixed to the housing 50 (not shown in FIG. 11) by a fastening member 97 formed of a bolt, a washer, or the like. The guide member 90 may be fixed to the housing 50 directly, or may be fixed to the housing 50 via another member such as a mounting bracket.

[0061] <Connection structure between heat exchanger and header> Next, a description will be given of the structure for circulating the heat medium through the heat exchanger 70 held by the support plate 80 inside the housing 50. Note that the header 110 to which the inlet line 2 is connected and the header 110 to which the outlet line 3 is connected have the same structure.

[0062] Fig. 12 is a schematic diagram showing the connection structure between the heat exchanger 70 and the header 110 of the carbon dioxide recovery device 1 of this embodiment. Fig. 12 shows a cross section of the heat exchanger 70 and guide member 90 housed in each of the first housing section 81 and the second housing section 82, which are located at the lowest side. The position of the cross section in Fig. 12 corresponds to the position of the flow path connection section 73 of the heat exchanger 70.

[0063] 12, a pipe flange 120 is arranged on the side surface of the housing 50 to connect the header 110 and the flow path connection portion 73. A plurality of pipe flanges 120 are arranged according to the number of heat exchangers 70. The header 110 and the pipe flange 120 are preferably made of a resin material or the like with a low heat transfer coefficient.

[0064] The pipe flange 120 has a cylindrical portion 121 through which the heat transfer medium flows, and a flange portion 125 that is sandwiched between the header 110 and the housing 50 .

[0065] The cylindrical portion 121 has an outer end portion of the housing 50 that is connected to the inside of the header 110 via a flange portion 125, and an inner portion of the housing 50 that is connected to the flow path connection portion 73 via the flange portion 125.

[0066] An O-ring 122 is disposed at a portion of the cylindrical portion 121 that is connected to the flow path connecting portion 73. The O-ring 122 is disposed in a groove formed in the outer peripheral surface of the tip portion of the cylindrical portion 121, and is in contact with the inner peripheral surface of the flow path connecting portion 73.

[0067] An O-ring 126 is disposed between the flange portion 125 and the header 110. The O-ring 126 is disposed in a groove formed on the surface of the flange portion 125 facing the outer surface of the header 110, and is fixed so as to surround the outside of the cylindrical portion 121.

[0068] An O-ring 127 is disposed between the flange portion 125 and the housing 50. The O-ring 127 is disposed in a groove formed on the surface of the flange portion 125 facing the outer surface of the header 110, and is fixed so as to surround the outside of the cylindrical portion 121.

[0069] As described above, the carbon dioxide recovery device 1 of this embodiment comprises a heat exchanger (adsorbent holding portion) 70 that holds the adsorbent 12, a support plate (support member) 80 having a first storage portion 81 and a second storage portion 82 into which the heat exchanger 70 can be slidably inserted, and a sealing portion 75 that is arranged on the heat exchanger 70 and deforms accordingly as the heat exchanger 70 is slidably inserted into the first storage portion 81 and the second storage portion 82, and the heat exchanger 70 is supported on the support plate 80 via the sealing portion 75.

[0070] This allows the heat exchanger 70 to be inserted from one side even with the parts assembled, and this can be achieved with a simple configuration in which the heat exchanger 70 is held floating on the support plate 80 via the seal portion 75. Furthermore, in the process of inserting the heat exchanger 70 into the first housing portion 81 and the second housing portion 82, the seal portion 75 is crushed and the gap between the heat exchanger 70 and the support plate 80 is filled, ensuring thermal insulation and watertightness and enabling control of the flow of air passing through the interior of the housing 10. Furthermore, the seal portion 75, which deforms adaptively, can absorb any unevenness (intersections) in the front, back, left, and right of the heat exchanger 70, and a carbon dioxide capture device 1 with stable quality can be achieved.

[0071] In this embodiment, the sealing portion 75 is made of a foam material.

[0072] As a result, the seal portion 75 is made of a porous material in which air bubbles are formed inside, and therefore, when the heat exchanger 70 is inserted, the seal portion 75 can deform with good conformity without getting caught on the first accommodating portion 81 and the second accommodating portion 82. This allows the heat exchanger 70 to be inserted smoothly, and further improves the sealing performance and heat insulating performance after insertion.

[0073] In addition, the carbon dioxide recovery device 1 of this embodiment has a first storage section 81 that stores the heat exchanger 70, and a second storage section 82 that is located next to the first storage section 81 and stores a heat exchanger 70 different from the heat exchanger 70 stored in the first storage section 81, and further includes a guide member 90 that is inserted between the heat exchanger 70 stored in the first storage section 81 and the heat exchanger 70 stored in the second storage section 82 and presses against each seal portion 75 of the heat exchanger 70.

[0074] This allows the guide member 90 to fix the heat exchangers 70 in the two storage sections, the first storage section 81 and the second storage section 82, and allows the device configuration to be compact while maintaining the holding force of the heat exchangers 70.

[0075] Furthermore, in this embodiment, the first accommodating section 81 is inclined so that the tip side in the insertion direction of the heat exchanger 70 is closer to the second accommodating section 82 than the base end side, the second accommodating section 82 is inclined so that the tip side in the insertion direction is closer to the first accommodating section 81 than the base end side, and the guide member 90 has a wedge-shaped tip in the insertion direction.

[0076] As a result, when the wedge-shaped guide member 90 is inserted into the inclined first storage section 81 and second storage section 82, the guide member 90 exerts a strong force pressing the seal section 75 toward the first storage section 81 or the second storage section 82, effectively increasing the adhesion between the first storage section 81 and the second storage section 82 of the seal section 75.

[0077] The carbon dioxide recovery device 1 of this embodiment also includes a header 110 through which the heat medium flows, a pipe flange 120 that connects the inside of the heat exchanger 70 with the inside of the header 110 and allows the heat medium to flow through the heat exchanger 70, and an O-ring 122 that is arranged between the heat exchanger 70 and the pipe flange 120.

[0078] If the heat exchanger 70 were in direct contact with other components, heat transfer would result in significant heat loss when heated during the desorption process, etc. In this regard, with the configuration of this embodiment, an O-ring 122 acting as a heat insulator is placed between the heat exchanger 70 and the pipe flange 120, which can suppress heat transfer from the heat exchanger 70 to other components and ensure sealing performance. The O-ring 122 forms an air layer between the heat exchanger 70 and the pipe flange 120, which can also suppress heat dissipation.

[0079] In addition, the carbon dioxide recovery device 1 of this embodiment includes a housing 50 to which the support plate 80 is fixed, a header 110 arranged on the outside of the housing 50 and through which a heat transfer medium flows, a cylindrical portion 121 that penetrates the housing 50 and connects the inside of the heat exchanger 70 with the inside of the header 110, an O-ring (insulating material) 126 arranged between the flange portion 125 and the housing 50, and an O-ring (insulating material) 127 arranged between the flange portion 125 and the header 110.

[0080] As a result, O-rings 126 and 127 are disposed between housing 50 and header 110 as heat insulating materials, so that heat transfer from heat exchanger 70 to header 110 via housing 50 can be suppressed.

[0081] (Second embodiment) The second embodiment has the same configuration as the first embodiment, except that a heat insulating material is added to the heat exchanger 70. Therefore, parts that perform the same functions as those in the first embodiment are denoted by the same reference numerals, and redundant explanations will be omitted where appropriate. FIG. 13 is an enlarged view of a portion of the heat exchanger 70. FIG. 13 is an enlarged view of the vicinity of range A in FIG. 7 . The heat exchanger 70 shown in FIG. 13 has a simplified and exaggerated shape, particularly the thickness of the fins 78, which are shown thicker than they actually are, and the shape is partially different from that shown in FIG. 7 . However, there is essentially no difference between the heat exchanger 70 of the first embodiment and the heat exchanger 70 of this embodiment, except for the presence or absence of a heat insulating material 79. Furthermore, the seal portion 75 is not shown in FIG. 13 .

[0082] The heat exchange body 71 of the heat exchanger 70 has, in addition to the insert portion 72, a side channel 76, a flow path 77, and fins 78.

[0083] The side channel 76 is provided at an end portion extending in a direction intersecting the direction in which the insertion portion 72 extends, and together with the insertion portion 72 constitutes the outer peripheral end of the heat exchanger body 71 .

[0084] A plurality of flow paths 77 are laid between a pair of insertion parts 72 arranged at both ends of the heat exchanger main body 71. A heat medium flows through the inside of the flow paths 77.

[0085] The fins 78 are formed from thin metal plate members and are arranged in a form in which they are repeatedly folded back in the space between the flow path 77 and the side channel 76, and in the space between one flow path 77 and the other flow path 77.

[0086] In the region surrounded by the insertion portion 72 and the side channel 76, the void S, which is the portion excluding the fins 78 and the flow path 77, is filled with the adsorbent 12. Note that in Figures 13 and 14, the adsorbent 12 is omitted to clearly show the shape of the heat exchanger main body 71.

[0087] In this embodiment, a heat insulating material 79 is provided on the surface of the heat exchanger body 71 except for the gap S. That is, the heat insulating material 79 is provided on the entire surface of the heat exchanger body 71 except for the portion that comes into contact with the adsorbent 12. FIG. 14 is a diagram showing a state in which the heat insulating material 79 is provided on the heat exchanger body 71 of the heat exchanger 70. The hatched portions in FIG. 14 indicate the heat insulating material 79. Specifically, the heat insulating material 79 is provided on the surface of the insertion portion 72, the surface of the side channel 76, the surface of the end face 77a of the flow path 77, and the surface of the end face 78a of the fin 78. The heat insulating material 79 is also provided on the back side of FIG. 14, i.e., the surface of the end face facing the end face 77a of the flow path 77 and the surface of the end face facing the end face 78a of the fin 78.

[0088] The heat insulating material 79 is arranged by applying a known coating type heat insulating material and drying it, for example. As the coating type heat insulating material, for example, heat cut powder or the like can be suitably used.

[0089] By providing the heat insulating material 79 in the heat exchanger main body 71, it is possible to suppress the loss of heat by heat transfer from the heat exchanger 70 to the outside, i.e., the loss of heat, thereby enabling the heat exchanger 70 to operate efficiently. In particular, at the portion where the heat exchanger 70 (heat exchanger main body 71) comes into contact, the presence of the heat insulating material 79 at the contact portion can enhance the effect of suppressing the loss of heat from the heat exchanger 70.

[0090] In this embodiment, the heat exchanger 70 has a seal portion 75 and is in contact with the support plate 80 and the guide member 90 via the seal portion 75. The seal portion 75 itself has the effect of suppressing heat transfer, but in this embodiment, a heat insulating material 79 is provided in the portion that contacts the seal portion 75, thereby achieving a higher heat insulating effect. Therefore, heat transfer to the seal portion 75 is suppressed, and further, heat transfer to the support plate 80 and the guide member 90 via the seal portion 75 can be suppressed, thereby achieving high heat insulation. Therefore, the carbon dioxide recovery device 1 of this embodiment can achieve high thermal efficiency.

[0091] Furthermore, when the effect of suppressing heat transfer by the seal portion 75 is low or when a configuration equivalent to the seal portion 75 is not provided, the importance of providing the heat insulating material 79 becomes even greater. In the present embodiment, an example has been shown in which the heat insulating material 79 is provided on the entire surface of the heat exchanger main body 71 except for the portion that comes into contact with the adsorbent 12. However, the portion where the heat insulating material 79 is provided may be a part of the surface of the heat exchanger main body 71 except for the portion that comes into contact with the adsorbent 12.

[0092] Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments. Furthermore, the effects described in the above embodiments are merely preferred effects, and the present invention is not limited to those described in the above embodiments. For example, a heat insulating material may be disposed in the portion of the cylindrical portion 121 that penetrates the header 110 or in the portion of the cylindrical portion 121 that penetrates the housing 50. [Explanation of symbols]

[0093] 1. Carbon dioxide capture device 10. Cabinet 12 Adsorbent 70 Heat exchanger 75 Seal part 79 Insulation 80 Support Plate 81 First storage section 82 Second storage section 90 Guide member 120 Pipe flange 121 Cylindrical part 122 O-ring 125 flange 125 O-ring 126 O-ring

Claims

1. an adsorbent holding section that holds an adsorbent; a support member having a receiving portion into which the adsorbent holding portion can be slidably inserted; a seal portion disposed on the adsorbent holding portion and capable of deforming in accordance with sliding insertion of the adsorbent holding portion into the accommodation portion; Equipped with the adsorbent holding portion is supported by the support member via the seal portion; A carbon dioxide capture device comprising:

2. The sealing portion is made of a foam material. The carbon dioxide capture device according to claim 1 .

3. The storage section is a first storage section that stores the adsorbent holding section; a second storage section located adjacent to the first storage section and accommodating the adsorbent holding section different from the adsorbent holding section accommodated in the first storage section; and a guide member that is inserted between the adsorbent holding portion housed in the first housing portion and the adsorbent holding portion housed in the second housing portion and presses the seal portion of each of the adsorbent holding portions, The carbon dioxide recovery device according to claim 1 or 2.

4. the first storage section is inclined so that a tip end side in an insertion direction of the adsorbent holding section is closer to the second storage section than a base end side, the second accommodating portion is inclined so that a tip end side in the insertion direction is closer to the first accommodating portion than a base end side, The guide member has a wedge-shaped tip in the insertion direction. The carbon dioxide capture device according to claim 3 .

5. a header through which a heat transfer medium flows; a pipe that communicates the interior of the adsorbent holding section with the interior of the header and that circulates the heat medium through the adsorbent holding section; a heat insulating material disposed between the adsorbent holding portion and the pipe; Equipped with The carbon dioxide recovery device according to claim 1 or 2.

6. a housing to which the support member is fixed; a header disposed outside the housing and through which a heat transfer medium flows; a cylindrical portion that penetrates the housing and communicates the interior of the adsorbent holding portion with the interior of the header; a flange portion disposed on the cylindrical portion and positioned between the header and the housing; a heat insulating material disposed between the flange portion and the housing and / or between the flange portion and the header; Equipped with The carbon dioxide recovery device according to claim 1 or 2.

7. The adsorbent holding section has a heat insulating material disposed on at least a part of its surface. The carbon dioxide recovery device according to claim 1 or 2.

8. The adsorbent holding section has a heat insulating material disposed on all of its surfaces except for a portion that comes into contact with the adsorbent. The carbon dioxide capture device according to claim 7.

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