CO2 removal equipment and combustion equipment

Abstract

The energy required to separate CO2 from the adsorbent can be reduced. [Solution] A CO2 removal device that removes CO2 from gas comprises a cylindrical housing, a plate-shaped first carrier that carries an adsorbent that adsorbs CO2 on its surface and is arranged within the housing, and a plate-shaped second carrier that carries an adsorbent that adsorbs CO2 on its surface and is arranged within the housing so that a gas flow path is formed between the first carrier and the second carrier, and the first carrier includes at least one first protrusion portion that protrudes toward the second carrier and extends within the gas flow path at a first angle relative to the extension direction of the housing, and the second carrier includes at least one second protrusion portion that protrudes toward the first carrier so as to come into contact with the first protrusion portion and extends within the gas flow path at a second angle that intersects the extension direction of the first protrusion portion and is different from the first angle relative to the extension direction.

Description

[Technical Field]

[0001] The present disclosure relates to a CO2 removal device that removes CO2 from gas, and a combustion facility that includes the CO2 removal device. [Background technology]

[0002] For example, Patent Document 1 discloses a CO2 removal device having a structure (honeycomb monolith) including multiple vertical channels formed by extending a wall containing a CO2 adsorbent from a gas inlet to an outlet. Patent Document 1 also describes heating the adsorbent that has adsorbed CO2 with heat from steam, and separating the CO2 from the adsorbent. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Special Publication No. 2023-520609 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the technology described in Patent Document 1 does not disclose or suggest a technology for reducing the energy (amount of steam) required when separating CO2 from the adsorbent that has adsorbed CO2.

[0005] The present disclosure has been made in consideration of the above-mentioned problems, and aims to provide a CO2 removal device that can reduce the energy required to separate CO2 from an adsorbent. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, the CO2 removal device of the present disclosure is a CO2 removal device that removes CO2 from a gas, and comprises: a cylindrical casing; a plate-shaped first carrier that carries an adsorbent that adsorbs CO2 on its surface, the first carrier being arranged within the casing; and a plate-shaped second carrier that carries an adsorbent that adsorbs CO2 on its surface, the second carrier being arranged within the casing so that a gas flow path is formed between the first carrier and the second carrier, through which the gas circulates, wherein the first carrier includes at least one first protrusion portion that protrudes toward the second carrier and extends within the gas flow path at a first angle with respect to the extension direction of the casing, and the second carrier includes at least one second protrusion portion that protrudes toward the first carrier so as to come into contact with the first protrusion portion and extends within the gas flow path at a second angle that intersects the extension direction of the first protrusion portion and is inclined with respect to the extension direction, the second angle being different from the first angle. [Effects of the Invention]

[0007] According to the CO2 removal device of the present disclosure, it is possible to reduce the energy required to separate CO2 from the adsorbent. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a perspective view showing the configuration of a CO2 removal device according to one embodiment. [Figure 2] FIG. 2 is an enlarged view of a portion of a first support according to an embodiment. [Figure 3] FIG. 2 is an enlarged view of a portion of a second support according to one embodiment. [Figure 4] FIG. 2 is an enlarged perspective view showing a part of a first support and a part of a second support according to one embodiment. [Figure 5] FIG. 4 is an enlarged view of a portion of a third support according to an embodiment. [Figure 6] FIG. 2 is an enlarged perspective view showing a part of a first support and a part of a third support according to an embodiment. [Figure 7] 1 is a diagram for explaining the action and effect of a CO2 removal device according to one embodiment. [Figure 8]It is a diagram schematically showing the configuration of a combustion facility equipped with a CO₂ removal device according to an embodiment. [Figure 9] It is a diagram schematically showing an example of the configuration of a combustion facility different from FIG. 8.

Mode for Carrying Out the Invention

[0009] Hereinafter, a CO₂ removal device according to an embodiment of the present disclosure and a combustion facility equipped with this CO₂ removal device will be described based on the drawings. Such an embodiment shows one aspect of the present disclosure, does not limit this disclosure, and can be arbitrarily changed within the scope of the technical idea of this disclosure.

[0010] <CO₂ removal device> (Configuration) The CO₂ removal device according to the present disclosure removes CO₂ from a gas. The gas to be removed of CO₂ is not particularly limited. In some embodiments, the CO₂ removal device applies direct air capture (DAC: Direct Air Capture) for recovering CO₂ from the atmosphere. In some embodiments, the CO₂ removal device is arranged upstream of the supercharger and removes CO₂ from the intake air of the supercharger.

[0011] FIG. 1 is a perspective view showing the configuration of a CO₂ removal device 1 according to an embodiment. As shown in FIG. 1, the CO₂ removal device 1 includes a housing 2, a first carrier 4, and a second carrier 6.

[0012] The housing 2 extends in a cylindrical shape, and both end faces in the extension direction D1 are open. The housing 2 is disposed in a flow path through which air A, from which CO2 is to be removed, flows. One opening serves as an inlet 2a for the air A to flow into the housing 2, and the other opening serves as an outlet 2b for the CO2-removed air A1, which is the air A from which CO2 has been removed, to flow out from the housing 2. In the embodiment illustrated in FIG. 1, the housing 2 has a rectangular cylindrical shape with the extension direction D1 being the longitudinal shape, but the present disclosure is not limited to this form. In some embodiments, the housing 2 has a cylindrical shape. In some embodiments, the housing 2 has a curved cylindrical shape. It should be noted that existing piping or ducts may be used as the housing 2.

[0013] The first carrier 4 and the second carrier 6 each have a plate shape and are arranged inside the housing 2. As shown in FIG. 1, the plate-shaped second carrier 6 is arranged inside the housing 2 so that a gas flow path 3 for circulating air A is formed between the plate-shaped second carrier 6 and the plate-shaped first carrier 4. The second carrier 6 is stacked on the first carrier 4 along the height direction D2 of the housing 2. The second carrier 6 is located on one side of the first carrier 4 in the height direction D2. Hereinafter, the direction perpendicular to each of the extension direction D1 and the height direction D2 will be referred to as the width direction D3 (the width direction of the housing 2).

[0014] FIG. 2 is an enlarged view of a portion of a first support 4 according to one embodiment. As shown in FIG. 2, the first support 4 supports an adsorbent 14 that adsorbs CO2 on a surface 12. The first support 4 supports the adsorbent 14 over the entire surface 12. The first support 4 is made of a ceramic such as cordierite. The adsorbent 14 is not particularly limited as long as it is capable of adsorbing CO2, and is, for example, an amine. Although the adsorbent 14 is not shown on the surface 12 of the first support 4 in the figures other than FIG. 2, the first support 4 will be described as supporting the adsorbent 14.

[0015] FIG. 3 is an enlarged view of a portion of the second support 6 according to one embodiment. As shown in FIG. 3, the second support 6 supports an adsorbent 14 that adsorbs CO2 on a surface 22. The second support 6 supports the adsorbent 14 over the entire surface 22. The second support 6 is made of a ceramic such as cordierite. The adsorbent 14 is not particularly limited as long as it is capable of adsorbing CO2, and is, for example, an amine. Although the adsorbent 14 is not shown on the surface 22 of the second support 6 in the figures other than FIG. 3, the second support 6 will be described as supporting the adsorbent 14.

[0016] FIG. 4 is an enlarged perspective view showing a part of the first support 4 and a part of the second support 6 according to one embodiment, and is a diagram for explaining the configuration of each of the first support 4 and the second support 6.

[0017] The first support 4 includes first protrusions 8 that protrude toward the second support 6. The first protrusions 8 extend through the gas flow path 3 at a first angle θ1 with respect to the extension direction D1. In one embodiment, as illustrated in FIG. 4 , the length of the first protrusions 8 in the width direction D3 narrows toward the second support 6, and the cross section has a triangular shape. A first imaginary line L1 is an imaginary line passing through the center of the base of the triangle of the first protrusions 8. When the first protrusions 8 are viewed from the height direction D2, the first angle θ1 is the smaller angle formed by the first imaginary line L1 and an extension line Ld that extends parallel to the extension direction D1, and the first imaginary line L1, the smaller angle being closer to the inlet 2a than the first imaginary line L1. In other words, the first angle θ1 is the angle of inclination with respect to the inflow direction of air A flowing into the housing 2 (the inflow direction of air A). The first angle θ1 is 15 degrees or greater and 60 degrees or less. The first support 4 includes a plurality of first protrusions 8 aligned along the width direction D3 (see FIG. 1). The plurality of first protrusions 8 are aligned at a predetermined pitch in the width direction D3.

[0018] In one embodiment, as illustrated in FIG. 4, the first support 4 includes an opposite-side first protrusion 9 that protrudes toward the other side in the height direction D2 (a third support 30, described later; see FIG. 6). The opposite-side first protrusion 9 extends at a third angle θ3 with respect to the extension direction D1. The length of the opposite-side first protrusion 9 in the width direction D3 narrows toward the other side in the height direction D2, and the cross section has a triangular shape. A virtual line passing through the center of the base of the triangle of the opposite-side first protrusion 9 is defined as a third virtual line L3. When the opposite-side first protrusion 9 is viewed from the height direction D2, the third angle θ3 is the smaller angle formed by the extension line Ld and the third virtual line L3 on the inlet 2a side than the third virtual line L3. In other words, the third angle θ3 is the angle of inclination with respect to the inflow direction of the air A. The third angle θ3 is equal to or greater than 15 degrees and equal to or less than 60 degrees. The first support 4 includes a plurality of opposite first protrusions 9 aligned along the width direction D3 (see FIG. 1). The plurality of opposite first protrusions 9 are aligned at a predetermined pitch in the width direction D3.

[0019] In one embodiment, the ridge line 8a of the first protrusion portion 8 and the ridge line 9a of the opposite first protrusion portion 9 extend parallel to each other, and the first angle θ1 and the third angle θ3 are equal to each other. In one embodiment, the first support 4 includes the first protrusion portion 8 and the opposite first protrusion portion 9 that are continuous in the width direction D3 so that the first protrusion portion 8 and the opposite first protrusion portion 9 form a zigzag shape. In some embodiments, the first protrusion portion 8 and the opposite first protrusion portion 9 extend so as to intersect each other. In some embodiments, the first support 4 includes the first protrusion portion 8 and the opposite first protrusion portion 9 that are arranged at intervals from each other in the width direction D3.

[0020] The second support 6 includes second ridges 10 that protrude toward the first support 4 and contact the first ridges 8. The second ridges 10 extend through the gas flow path 3 at a second angle θ2, which is different from the first angle θ1, and intersects with the direction in which the first ridges 8 extend. The second ridges 10 extend in the gas flow path 3 and are inclined relative to the extension direction D1 at a second angle θ2. The second ridges 10 extend in the width direction D3, which is smaller than the first angle θ1. In one embodiment, as shown in FIG. 4 , the length of the second ridges 10 in the width direction D3 narrows toward the first support 4, and the cross section is triangular. The ridges 10a of the second ridges 10 and the ridges 8a of the first ridges 8 are in point contact at position P. A second imaginary line L2 is an imaginary line passing through the center of the base of the triangle of the second ridges 10. When the second ridges 10 are viewed from the height direction D2, the second angle θ2 is the smaller angle formed by the extension line Ld and the second imaginary line L2 on the inlet 2a side than the second imaginary line L2. In other words, the second angle θ2 is an inclination angle with respect to the inflow direction of the air A. This second angle θ2 is equal to or greater than 15 degrees and equal to or less than 60 degrees. The second support 6 includes a plurality of second protrusions 10 aligned along the width direction D3 (see FIG. 1). The plurality of second protrusions 10 are aligned at a predetermined pitch in the width direction D3.

[0021] In one embodiment, as illustrated in FIG. 4 , the second support 6 includes an opposite-side second protrusion 11 that protrudes toward one side in the height direction D2 (the side opposite to the first support 4). The opposite-side second protrusion 11 extends at a fifth angle θ5 with respect to the extension direction D1. The length of the opposite-side second protrusion 11 in the width direction D3 narrows toward one side in the height direction D2, and the cross section has a triangular shape. A fifth imaginary line L5 is an imaginary line passing through the center of the base of the triangle of the opposite-side second protrusion 11. When the opposite-side second protrusion 11 is viewed from the height direction D2, the fifth angle θ5 is the smaller angle formed by the extension line Ld and the fifth imaginary line L5 on the inlet 2a side than the fifth imaginary line L5. In other words, the fifth angle θ5 is the angle of inclination with respect to the inflow direction of the air A. The fifth angle θ5 is equal to or greater than 15 degrees and equal to or less than 60 degrees. The second support 6 includes a plurality of opposite second protrusions 11 aligned along the width direction D3 (see FIG. 1). The plurality of opposite second protrusions 11 are aligned at a predetermined pitch in the width direction D3.

[0022] In one embodiment, the ridge line 10a of the second protrusion portion 10 and the ridge line 11a of the opposite second protrusion portion 11 extend parallel to each other, and the second angle θ2 and the fifth angle θ5 are equal to each other. In one embodiment, the second support 6 includes the second protrusion portion 10 and the opposite second protrusion portion 11 that are continuous in the width direction D3 so that the second protrusion portion 10 and the opposite second protrusion portion 11 form a zigzag shape. In some embodiments, the second protrusion portion 10 and the opposite second protrusion portion 11 extend so as to intersect each other. In some embodiments, the second support 6 includes the second protrusion portion 10 and the opposite second protrusion portion 11 that are arranged at intervals from each other in the width direction D3.

[0023] In one embodiment, as illustrated in FIG. 1 , the CO2 removal device 1 further includes a third carrier 30. The third carrier 30 has a plate shape and is disposed within the housing 2. The plate-shaped third carrier 30 is disposed within the housing 2 on the opposite side of the first carrier 4 from the second carrier 6 so that a second gas flow path 33 for circulating air A is formed between the plate-shaped third carrier 30 and the first carrier 4. The third carrier 30 is stacked on the first carrier 4 along the height direction D2 of the housing 2. The third carrier 30 is located on the other side of the first carrier 4 in the height direction D2. In other words, the second carrier 6, the first carrier 4, and the third carrier 30 are stacked in this order from one side in the height direction D2.

[0024] FIG. 5 is an enlarged view of a portion of a third support 30 according to one embodiment. As illustrated in FIG. 5, the third support 30 is similar to the first support 4 and the second support 6, and supports an adsorbent 14 that adsorbs CO2 on a surface 32. The third support 30 supports the adsorbent 14 over the entire surface 32. The third support 30 is made of a ceramic such as cordierite. The adsorbent 14 is not particularly limited as long as it is capable of adsorbing CO2, and may be, for example, an amine. Although the adsorbent 14 is not illustrated on the surface 32 of the third support 30 in the figures other than FIG. 5, the third support 30 will be described as supporting the adsorbent 14.

[0025] FIG. 6 is an enlarged perspective view showing a part of the first support 4 and a part of the third support 30 according to one embodiment, and is a view for explaining the configuration of the third support 30. As shown in FIG.

[0026] The third support 30 includes a third protrusion 34 that protrudes toward the first support 4 so as to contact the opposite-side first protrusion 9. The third protrusion 34 extends through the second gas flow path 33, intersecting the direction in which the opposite-side first protrusion 9 extends and tilting at a fourth angle θ4, different from the third angle θ3, with respect to the extension direction D1. The length of the third protrusion 34 in the width direction D3 narrows toward the first support 4, and the cross section has a triangular shape. The ridge line 34a of the third protrusion 34 and the ridge line 9a of the opposite-side first protrusion 9 are in point contact at a second position P2. A fourth imaginary line L4 is an imaginary line passing through the center of the base of the triangle of the third protrusion 34. When the third protrusion 34 is viewed from the height direction D2, the fourth angle θ4 is the smaller angle formed by the extension line Ld and the fourth imaginary line L4 on the inlet 2a side than the fourth imaginary line L4. In other words, the fourth angle θ4 is an inclination angle with respect to the inflow direction of the air A. This fourth angle θ4 is equal to or greater than 15 degrees and equal to or less than 60 degrees. The third support 30 includes a plurality of third protrusions 34 aligned along the width direction D3 (see FIG. 1). The plurality of third protrusions 34 are aligned at a predetermined pitch in the width direction D3.

[0027] In one embodiment, as illustrated in FIG. 6, the third carrier 30 includes an opposite-side third protrusion 36 that protrudes toward the other side in the height direction D2 (the side opposite to the first carrier 4). The opposite-side third protrusion 36 extends at an angle with respect to the extension direction D1. The length of the opposite-side third protrusion 36 in the width direction D3 narrows toward the other side in the height direction D2, and the cross section has a triangular shape. In other words, the opposite-side third protrusion 36 is inclined with respect to the inflow direction of the air A. The third carrier 30 includes a plurality of opposite-side third protrusions 36 aligned along the width direction D3 (see FIG. 1). The plurality of opposite-side third protrusions 36 are aligned at a predetermined pitch in the width direction D3.

[0028] In one embodiment, the second carrier 6 has the same shape as the first carrier 4. The second carrier 6 arranged in the housing 2 is the first carrier 4 arranged in the housing 2, turned upside down. The third carrier 30 has the same shape as the first carrier 4. The third carrier 30 arranged in the housing 2 is the first carrier 4 arranged in the housing 2, turned upside down. In other words, three or more first carriers 4 are alternately stacked upside down in the housing 2, and a plurality of gas flow paths 3 for circulating air A are formed in the housing 2. The second angle θ2 and the fourth angle θ4 are the same angle. In some embodiments, the first carrier 4 and the second carrier 6 have different shapes. In some embodiments, the first carrier 4 and the third carrier 30 have different shapes.

[0029] Hereinafter, when a plurality of first carriers 4 is described, it is assumed to include all the plate-shaped carriers (including the first carrier 4, the second carrier 6, and the third carrier 30) arranged in the housing 2. When a plurality of gas flow paths 3 is described, it is assumed to include all the gas flow paths (including the gas flow path 3 and the second gas flow path 33) formed between the plate-shaped carriers in the housing 2.

[0030] (Actions and Effects) The operation and effect of the CO2 removal device 1 according to one embodiment will now be described. The reaction that takes place between the air A flowing inside the housing 2 and the adsorbent 14 (catalyst) inside the housing 2 is expressed by the formula 1 / K=1 / Kr+1 / Kf. Here, K is the CO2 adsorption rate of the entire adsorbent 14, Kr is the CO2 adsorption rate of the adsorbent 14, and Kf is the mass transfer coefficient for the transfer of CO2 from the air A to the adsorbent 14. Therefore, by increasing the mass transfer coefficient Kf, the CO2 adsorption rate K of the entire adsorbent 14 increases, improving the performance of the CO2 removal device 1.

[0031] FIG. 7 is a diagram illustrating the operation and effect of a CO2 removal device 1 according to one embodiment, showing the gas flow path 3 as viewed from the width direction D3. According to one embodiment, as shown in FIG. 7, air A flowing into the gas flow path 3 flows along the convex surfaces 8b of the first ridges 8, the concave surfaces 9b of the opposite-side first ridges 9, the convex surfaces 10b of the second ridges 10, and the concave surfaces 11b of the opposite-side second ridges 11. This disrupts the flow of air A within the gas flow path 3, making it easier for CO2 contained in the air A to come into contact with the adsorbent 14 and increasing the mass transfer coefficient Kf. Furthermore, disrupting the flow of air A thins the boundary film of the adsorbent 14, improving the reaction rate of the adsorbent 14.

[0032] As described above, according to one embodiment, the flow of air A within the multiple gas flow paths 3 formed within the housing 2 is disrupted, accelerating the transfer of CO2 from the air A to the adsorbent 14 (hereinafter referred to as mass transfer). This promotion of mass transfer improves the adsorption performance of CO2. Therefore, even if the volume of each of the multiple first supports 4 arranged within the housing 2 is reduced, a certain level of CO2 adsorption capacity can be achieved, and the amount of atmospheric moisture adsorbed by each of the multiple first supports 4 can be reduced by minimizing the adsorbent area (mass). Therefore, when heating the adsorbent 14 to separate CO2 from the adsorbent 14, the energy used to heat each of the multiple first supports 4 can be reduced. Therefore, the energy required to separate CO2 from the adsorbent 14 can be suppressed. Furthermore, by reducing the volume of each of the multiple first supports 4, the size of the housing 2 can be reduced, allowing the CO2 removal device 1 to be made more compact.

[0033] According to one embodiment, the air A flows through the gas flow path 3 at an angle with respect to the extension direction D1 due to the first protrusions 8 and the second protrusions 10. Therefore, the air A can be retained in the housing 2 for a longer period of time than when the air A flows through the gas flow path 3 parallel or substantially parallel to the extension direction D1, and the amount of CO2 adsorbed by the adsorbent 14 can be increased.

[0034] As the first angle θ1 and the second angle θ2 of the first ridge 8 and the second ridge 10 approach 90 degrees, the air A can be retained for a longer period of time within the housing 2, but the pressure loss of the air A due to blocking the flow of the air A becomes significantly large. The same is true for the opposite-side first ridge 9, the opposite-side second ridge 11, and the third ridge 34; as the third angle θ3 to the fifth angle θ5 approach 90 degrees, the pressure loss of the air A becomes significantly large. According to one embodiment, the first angle θ1 to the fifth angle θ5 are each between 15 degrees and 60 degrees, which makes it possible to lengthen the retention time of the air A within the housing 2 while suppressing an increase in the pressure loss of the air A.

[0035] As described above, when the air A flows through the gas flow passage 3 parallel or substantially parallel to the extension direction D1, the first protrusions 8 and the second protrusions 10 extend parallel or substantially parallel to the extension direction D1. In this case, the plate-shaped first support 4 has high bending strength in the extension direction D1 but low bending strength in the width direction D3. This may cause the first support 4 to bend, resulting in irregular cross-sectional areas of the gas flow passages 3. According to one embodiment, the first angle θ1 to the fifth angle θ5 are each 15 degrees or greater and 60 degrees or less, thereby increasing the rigidity of each of the multiple first supports 4 in the width direction D3 and suppressing bending. This reduces irregular changes in the cross-sectional areas of the multiple gas flow passages 3, thereby preventing regions of low mass transfer in each of the multiple gas flow passages 3.

[0036] According to one embodiment, a plurality of first carriers 4 (for example, the first carrier 4 and the second carrier 6) are stacked so as to be in point contact with each other, and therefore the flow of air A can be disrupted at the point contact portion (position P). Furthermore, the point contact portion is only a part of the ridge line 8a of the first protrusion portion 8 and the ridge line 10a of the second protrusion portion 10, and therefore the pressure loss of the air A can be prevented from becoming extremely high.

[0037] According to one embodiment, the second support 6 and the third support 30 each have the same shape as the first support 4, and therefore the second support 6 and the third support 30 can each be manufactured by the same method as the first support 4. This allows the manufacturing cost of the CO2 removal device 1 to be reduced.

[0038] <Combustion equipment> 8 is a diagram schematically illustrating the configuration of a combustion facility 100 including a CO2 removal device 1 according to one embodiment. As shown in FIG. 8, the combustion facility 100 includes a CO2 removal device 1, a combustion device 102, a generator 104, a boiler 106, a heating device 124, a CO2 recovery device 130, and a treatment device 140.

[0039] The combustion device 102 is configured so that CO2-removed air A1, which is air A from which CO2 has been removed by the CO2 removal device 1, is introduced into the compressor 110. In other words, the CO2 removal device 1 is disposed upstream of the combustion device 102 in the direction of flow of combustion air in the combustion facility 100. In one embodiment, the combustion device 102 is a gas turbine 102A (102) and includes, in addition to the compressor 110, a combustor 112 and a turbine 114. The generator 104 is connected to the turbine 114. In the embodiment illustrated in FIG. 8, the gas turbine 102A is a single-shaft gas turbine, and the compressor 110 and the turbine 114 are connected to each other by a connecting shaft 116 and configured to rotate integrally. The turbine 114 and the generator 104 are connected to each other via the connecting shaft 116, and the generator 104 is driven by the turbine 114 to generate electricity.

[0040] The compressor 110 compresses the CO2-removed air A1 supplied from the CO2 removal device 1 to generate compressed air A2, and supplies this compressed air A2 to the combustor 112. The combustor 112 mixes the compressed air A2 supplied from the compressor 110 with fuel F and burns the mixture to generate combustion gas G1. The combustion gas G1 generated in the combustor 112 flows into and drives the turbine 114. This drives the compressor 110 and the generator 104, which are connected to the turbine 114, and the generator 104 generates electricity. The combustion gas G1 that has passed through the turbine 114 is supplied to the boiler 106 as exhaust gas G2 from the gas turbine 102A.

[0041] The boiler 106 is configured to generate steam S using the heat of the exhaust gas G2 discharged from the gas turbine 102A. In the embodiment illustrated in FIG. 8, the boiler 106 is a heat recovery boiler that generates steam S by evaporating boiler feedwater W through heat exchange with the exhaust gas G2. In the embodiment illustrated in FIG. 8, the combustion equipment 100 further includes a steam turbine 118 that is driven by the steam S supplied from the boiler 106 and is connected to the generator 104 via a connecting shaft 116. Such combustion equipment 100 is configured to recover the energy of the steam S by generating power using the steam S generated in the boiler 106. The steam S discharged from the steam turbine 118 is returned to water by a condenser 122 and used as boiler feedwater W.

[0042] The heating device 124 is configured to heat the plurality of first carriers 4 (including the second carrier 6 and the third carrier 30) using the steam S generated in the boiler 106 as a heat source. In the embodiment illustrated in FIG. 8, the heating device 124 is configured to extract a portion of the steam S supplied to the steam turbine 118 (hereinafter referred to as heat source steam Sh) and supply the heat source steam Sh to the CO2 removal device 1. Such a heating device 124 is, for example, a pipe, and connects a steam line through which the steam S supplied to the steam turbine 118 flows to the CO2 removal device 1, and is configured so that the heat source steam Sh flows toward the CO2 removal device 1. Each of the plurality of first carriers 4 is indirectly heated without coming into contact with the heat source steam Sh.

[0043] The CO2 recovery device 130 recovers CO2 from the combustion gas G1. In the embodiment illustrated in Fig. 8, CO2 is recovered from the exhaust gas G2 of the gas turbine 102A and gaseous CO2 (referred to as a first CO2 gas CG1) is discharged. The configuration of the CO2 recovery device 130 is not particularly limited, but may include, for example, an absorption tower that absorbs CO2 by bringing an absorbing liquid for absorbing CO2 into contact with the exhaust gas G2, and a regeneration tower that heats the absorbing liquid that has absorbed CO2 in the absorption tower to separate and discharge CO2.

[0044] The treatment device 140 is configured to treat the CO2 captured by the CO2 capture device 130 together with the CO2 removed by the CO2 removal device 1. In the embodiment illustrated in FIG. 8, the combustion facility 100 includes a confluence line 150 for confluence of the gaseous CO2 removed by the CO2 removal device 1 (referred to as second CO2 gas CG2) with the first CO2 gas CG1 supplied to the treatment device 140. Therefore, the first CO2 gas CG1 and the second CO2 gas CG2 are supplied to the treatment device 140. The treatment device 140 is, for example, a compression device that compresses the first CO2 gas CG1 and the second CO2 gas CG2 to produce liquefied CO2. The liquefied CO2 produced by the treatment device 140 is discharged, for example, underground.

[0045] According to the embodiment illustrated in FIG. 8, by arranging the CO2 removal device 1 upstream of the gas turbine 102A, it is possible to use the intake air of the gas turbine 102A to circulate air A through the CO2 removal device 1. This eliminates the need to provide the CO2 removal device 1 with an air circulation device such as a fan or vacuum pump. The combustion device 102 is not limited to the gas turbine 102A. The combustion device 102 may also be a boiler or an incinerator equipped with a ventilation device (for example, a fan) for ventilating the intake air or exhaust air. The gas turbine 102A is more suitable for installation of the CO2 removal device 1 than other combustion devices such as boilers and incinerators because of its particularly large ventilation volume.

[0046] 8, the combustion equipment 100 is a power generation facility that applies a gas turbine combined cycle including a steam turbine 118 and a boiler 106 (heat recovery steam generator; HRSG), but the present disclosure is not limited to this configuration. The combustion equipment 100 may also be a facility that does not include the steam turbine 118 or the boiler 106 and applies a simple cycle in which the exhaust gas G2 flows directly from the turbine 114 to the CO2 recovery device 130.

[0047] According to the embodiment illustrated in FIG. 8, the plurality of first supports 4 are heated using the heat source steam Sh as a heat source, so that it is not necessary to provide the CO2 removal device 1 with a heating device that generates the thermal energy required to heat the plurality of first supports 4.

[0048] According to the embodiment illustrated in FIG. 8, by using the treatment device 140, it is not necessary to provide the CO2 removal device 1 with a device for treating the second CO2 gas CG2 separately from the treatment device 140.

[0049] It should be noted that the present disclosure does not limit the configuration of the combustion equipment 100 to the form illustrated in Fig. 8. Fig. 9 is a diagram schematically illustrating an example of the configuration of the combustion equipment 100 different from that illustrated in Fig. 8. As illustrated in Fig. 9, the combustion equipment 100 includes a CO2 removal device 1, a combustion device 102, a generator 104, a boiler 106, a steam turbine 118, a CO2 capture device 130, a processing device 140, and a heater 160. Among the components of the combustion equipment 100 illustrated in Fig. 9, the same components as those of the combustion equipment 100 illustrated in Fig. 8 (the CO2 removal device 1, the combustion device 102, the generator 104, the boiler 106, the steam turbine 118, the CO2 capture device 130, and the processing device 140) are designated by the same reference numerals, and detailed description thereof will be omitted.

[0050] In the embodiment illustrated in Fig. 9, the combustion device 102 is an incinerator 102B (102). The incinerator 102B is arranged downstream of the CO2 removal device 1 in the direction of flow of combustion air in the combustion facility 100 so that CO2-removed air A1 is introduced. The boiler 106 generates steam S using the heat of the exhaust gas Gx discharged from the incinerator 102B. The CO2 recovery device 130 recovers CO2 from the exhaust gas Gx of the incinerator 102B, which flows from the boiler 106 to the treatment device 140, and discharges a first CO2 gas CG1.

[0051] The heater 160 heats the CO2-removed air A1. The CO2-removed air A1 heated by the heater 160 is introduced into the incinerator 102B. In the embodiment illustrated in Fig. 9, the heater 160 is an air preheater 160A (160), and the CO2-removed air A1 flowing toward the incinerator 102B is heated by the heat of the exhaust gas Gx from the incinerator 102B flowing from the boiler 106 toward the CO2 recovery device 130.

[0052] 9, the combustion facility 100 further includes a heated air line 162 for extracting a portion of the CO2-removed air A1 heated by the air preheater 160A and supplying it to the CO2 removal device 1. Such a heated air line 162 is, for example, a pipe connecting the CO2 removal device 1 to an air supply pipe that connects the air preheater 160A and the incinerator 102B.

[0053] According to the combustion equipment 100 illustrated in Fig. 9, CO2-removed air A1 heated by the air preheater 160A is introduced into the incinerator 102B, thereby improving the combustion efficiency in the incinerator 102B. According to the combustion equipment 100 illustrated in Fig. 9, a portion of the CO2-removed air A1 heated by the air preheater 160A is supplied to the CO2 removal device 1 via the heated air line 162. In other words, since the multiple first carriers 4 are heated using the exhaust gas Gx from the incinerator 102B as a heat source, it is not necessary to provide the CO2 removal device 1 with a heating device that generates the thermal energy required to heat the multiple first carriers 4.

[0054] The contents described in each of the above embodiments can be understood, for example, as follows.

[0055] [1] The CO2 removal device (1) according to the present disclosure is A CO2 removal device that removes CO2 from gas (A), A cylindrical housing (2), a plate-shaped first support (4) carrying an adsorbent (14) that adsorbs CO2 on a surface (12) thereof, the first support (4) being disposed within the housing; a second support (6) in the form of a plate carrying an adsorbent (14) that adsorbs CO2 on a surface (22), the second support (6) being disposed in the housing so as to form a gas flow path (3) through which the gas flows between the second support (6) and the first support (22); the first support includes at least one first protrusion (8) that protrudes toward the second support and extends in the gas flow path at a first angle (θ1) with respect to the extending direction (D1) of the housing, The second support includes at least one second protrusion portion (10) that protrudes toward the first support so as to come into contact with the first protrusion portion, and extends within the gas flow path intersecting the direction in which the first protrusion portion extends and inclined at a second angle (θ2) with respect to the extension direction that is different from the first angle.

[0056] According to the configuration described in [1] above, the flow of gas in the gas flow path is disturbed, accelerating the transfer of CO2 from the gas to the adsorbent (hereinafter referred to as mass transfer), and this promotion of mass transfer improves the adsorption performance of CO2. Therefore, by reducing the volume of the first support and the second support and thereby reducing the amount of moisture adsorbed on the first support and the second support, it is possible to reduce the energy used to heat the first support and the second support when heating the adsorbent to separate CO2 from the adsorbent. Therefore, it is possible to reduce the energy required to separate CO2 from the adsorbent.

[0057] [2] In some embodiments, in the configuration described in [1] above, The second carrier has the same shape as the first carrier.

[0058] According to the configuration described in [2] above, the second carrier can be manufactured by the same method as the first carrier, so that the manufacturing cost of the CO2 removal device can be reduced.

[0059] [3] In some embodiments, in the configuration described in [1] or [2] above, Each of the first angle and the second angle is equal to or greater than 15 degrees and equal to or less than 60 degrees.

[0060] According to the configuration described in [3] above, the rigidity of each of the plate-shaped first carrier and the plate-shaped second carrier is increased in a direction intersecting the extending direction of the housing, and the occurrence of deflection is suppressed. As a result, irregular changes in the cross-sectional area of ​​the gas flow path are reduced, and it is possible to suppress the occurrence of regions in the gas flow path where the amount of mass transfer is low.

[0061] [4] In some embodiments, in the configuration described in any one of [1] to [3] above, the third support (30) is a plate-like third support carrying an adsorbent (14) that adsorbs CO2 on a surface (32), and is disposed in the housing on the opposite side of the second support with the first support interposed therebetween so as to form a second gas flow path (33) through which the gas flows between the third support (30) and the first support; the first support includes at least one opposite first protrusion (9) that protrudes toward the third support and extends along the second gas flow path while being inclined at a third angle (θ3) with respect to the extension direction, The third support includes at least one third protrusion portion (34) that protrudes toward the first support so as to contact the opposite first protrusion portion, and extends along the second gas flow path, intersecting the extension direction of the opposite first protrusion portion and inclined at a fourth angle (θ4) with respect to the extension direction that is different from the third angle.

[0062] According to the configuration described in [4] above, by arranging a plurality of carriers in a stacked manner within the housing, a plurality of gas flow paths can be formed.

[0063] [5] The combustion equipment (100) according to the present disclosure includes: A CO2 removal device (1) according to any one of [1] to [4] above; and a combustion device (102) configured to receive the gas (A1) from which CO2 has been removed by the CO2 remover.

[0064] According to the configuration described in [5] above, it is possible to circulate gas through the CO2 removal device by utilizing the intake air to the combustion device, which eliminates the need for a device for circulating gas through the CO2 removal device.

[0065] [6] In some embodiments, in the configuration described in [5] above, a boiler (106) configured to generate steam (S) using heat from combustion gas (G1) discharged from the combustion device; The heating system further includes a heating device (124) configured to heat each of the first carrier and the second carrier using the steam generated in the boiler as a heat source.

[0066] According to the configuration described in [6] above, it is possible to dispense with the provision of a heating device that generates the thermal energy required to heat the first support and the second support.

[0067] [7] In some embodiments, in the configuration described in [5] or [6] above, a CO2 recovery device (130) that recovers CO2 from the combustion gas (G1) discharged from the combustion device; and a processing device (140) configured to process the CO2 (CG1) captured by the CO2 capture device together with the CO2 (CG2) removed by the CO2 removal device.

[0068] According to the configuration described in [7] above, by using the treatment device, it is possible to avoid providing a device for treating the CO2 removed by the CO2 removal device separately from this treatment device.

[0069] [8] In some embodiments, in the configuration described in any one of [5] to [7] above, The combustion device is a gas turbine (102A).

[0070] According to the configuration described in [8] above, gas turbines have a much larger ventilation volume than other combustion devices such as boilers and incinerators. Therefore, by utilizing the intake air to the gas turbine, the amount of CO2 removed can be increased.

[0071] [9] In some embodiments, in the configuration described in any one of [5] to [8] above, The system further includes a heater (160) for heating CO2-removed air (A1), which is the gas from which CO2 has been removed by the CO2 removal device, The combustion device is configured to introduce the CO2-removed air heated by the heater.

[0072] According to the configuration described in [9] above, the combustion efficiency in the combustion device can be improved.

[0073]

[10] In some embodiments, in the configuration described in [9] above, the heater is an air preheater (160A) that heats the CO2-removed air with exhaust gas (Gx) discharged from the combustion device, The system further includes a heated air line (162) for extracting a part of the CO2 removed air heated by the heater and supplying the extracted air to the CO2 remover (1).

[0074] According to the configuration described in

[10] above, it is possible to dispense with the provision of a heating device that generates the thermal energy required to heat the first support and the second support. [Explanation of symbols]

[0075] 1 CO2 removal device 2. Case 2a entrance 2b exit 3 Gas flow path 4. First Carrier 6 Secondary carrier 8 First protrusion 8a Ridgeline 8b Convex 9 Opposite side first protrusion 9a ridgeline 9b concave 10 Second protrusion 10a Ridgeline 10b Convex 11 Opposite side second protrusion 11a Ridgeline 11b concave 12 Surface of first carrier 14 Adsorbents 22 Surface of second carrier 30 Third Carrier 32 Surface of the third carrier 33 Second gas flow path 34 Third protrusion 34a Ridgeline 36 Third ridge on the opposite side 100 Combustion equipment 102 Combustion equipment 102A gas turbine 104 Generator 106 Boiler 110 Compressor 112 Combustor 114 Turbine 116 Connecting shaft 118 Steam Turbine 122 Condenser 124 Heating device 130 Recovery Device 140 Processing equipment 150 Merging Line 160 Heater 160A Air Preheater 162 Heated Air Line A. Air A1 CO2 removed air A2 Compressed air CG1 First CO2 gas CG2 Second CO2 gas CW Condensed water D1 Extending direction D2 Height direction D3 Width direction F fuel G1 Combustion Gas G2 exhaust gas K CO2 adsorption rate across the adsorbent Kf mass transfer coefficient L1 First virtual line L2 Second virtual line L3 Third virtual line L4 4th virtual line L5 5th virtual line Ld extension line S Steam Sh Steam for heat source W Boiler feedwater

Claims

1. A CO2 removal device for removing CO2 from a gas, A cylindrical housing; a plate-shaped first carrier having an adsorbent that adsorbs CO2 on its surface, the first carrier being disposed within the housing; a plate-shaped second carrier carrying an adsorbent that adsorbs CO2 on its surface, the second carrier being disposed within the housing so as to form a gas flow path for circulating the gas between the second carrier and the first carrier; the first carrier includes at least one first protrusion portion that protrudes toward the second carrier and extends in the gas flow path at a first angle with respect to an extension direction of the housing, the second support includes at least one second protrusion portion that protrudes toward the first support so as to come into contact with the first protrusion portion, and that extends in the gas flow path intersecting the direction in which the first protrusion portion extends and at a second angle that is different from the first angle with respect to the extending direction; CO2 removal device.

2. The second carrier has the same shape as the first carrier. The CO2 removal device according to claim 1.

3. each of the first angle and the second angle is equal to or greater than 15 degrees and equal to or less than 60 degrees; The CO2 removal device according to claim 1 or 2.

4. a third carrier in the form of a plate carrying an adsorbent that adsorbs CO2 on its surface, the third carrier being disposed on the opposite side of the second carrier with the first carrier interposed therebetween in the housing so as to form a second gas flow path for circulating the gas between the third carrier and the first carrier; the first support includes at least one opposite-side first protrusion portion that protrudes toward the third support and extends in the second gas flow path at a third angle with respect to the extension direction, the third support includes at least one third protrusion portion that protrudes toward the first support so as to come into contact with the opposite-side first protrusion portion, and that extends in the second gas flow path intersecting a direction in which the opposite-side first protrusion portion extends and being inclined at a fourth angle different from the third angle with respect to the extending direction; The CO2 removal device according to claim 1 or 2.

5. The CO2 removal device according to claim 1 or 2; a combustion device configured to receive the gas from which CO2 has been removed by the CO2 removal device, Combustion equipment.

6. a boiler configured to generate steam using heat from the combustion gas discharged from the combustion device; a heating device configured to heat each of the first carrier and the second carrier using the steam generated in the boiler as a heat source, The combustion facility according to claim 5.

7. a CO2 recovery device that recovers CO2 from the combustion gas discharged from the combustion device; a processing device configured to process the CO2 captured by the CO2 capture device together with the CO2 removed by the CO2 removal device, The combustion facility according to claim 5.

8. the combustion device is a gas turbine; The combustion facility according to claim 5.

9. The CO2 removal device further includes a heater for heating the CO2-removed air, which is the gas from which CO2 has been removed. The combustion device is configured to introduce the CO2-removed air heated by the heater. The combustion facility according to claim 5.

10. the heater is an air preheater that heats the CO2-removed air with exhaust gas discharged from the combustion device, a heated air line for extracting a portion of the CO2-removed air heated by the heater and supplying the extracted air to the CO2 removal device (1); The combustion facility according to claim 9.

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