Temperature swing type physical adsorber

Abstract

To provide an art which enables an entire adsorption part to achieve sufficient performance in a temperature swing type physical adsorber which adsorbs and desorbs carbon dioxide according to temperature change.SOLUTION: A base material 45 of an adsorption member 4 is disposed contacting with an inner peripheral surface 3b of a tube 3 inserted into a shell 2 directly or indirectly. The base material 45 includes a plurality of hole parts 41 which partition a flow passage 3a of the tube 3. An adsorption layer 42 which adsorbs carbon dioxide at a first temperature and desorbs carbon dioxide at a second temperature higher than the first temperature is provided on an inner wall of each of a plurality of hole parts 41a.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a thermal swing physical adsorption device. [Background technology]

[0002] Technologies have been proposed to reduce emissions of carbon dioxide, a greenhouse gas, toward the goal of carbon neutrality by 2050. One of these technologies is a temperature swing physical adsorption device that repeats the adsorption of carbon dioxide at room temperature and desorption at high temperatures.

[0003] For example, the temperature swing type physical adsorption device described in Patent Document 1 introduces a carbon dioxide-containing gas into a carbon dioxide adsorption tower that stores an adsorbent, and causes the adsorbent to adsorb carbon dioxide. Then, a heat medium is circulated through heat medium flow paths provided inside and outside the carbon dioxide adsorption tower. The adsorbent is heated by the heat of the heat medium, and the adsorbed carbon dioxide is desorbed. The desorbed carbon dioxide is expelled from the carbon dioxide adsorption tower by a regeneration gas introduced into the carbon dioxide adsorption tower. The adsorbent from which the carbon dioxide has been desorbed is cooled. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2015-150464 A Summary of the Invention [Problem to be solved by the invention]

[0005] As shown in FIG. 14, the higher the temperature of the adsorbent, the less carbon dioxide is adsorbed. When the adsorbent is heated to a high temperature (for example, 90 to 100°C), carbon dioxide is released from the adsorbent. In the above-mentioned temperature swing type physical adsorption device, the heat of the heat medium flowing through the heat medium flow path provided outside the carbon dioxide adsorption tower is transferred to the adsorbent in contact with the carbon dioxide adsorption tower, and the heat of the heat medium flowing through the heat medium flow path provided inside the carbon dioxide adsorption tower is transferred to the adsorbent in contact with the heat medium flow path. Then, the heat is transferred sequentially from the adsorbent to which the heat is transferred to the adsorbent not in contact with the carbon dioxide adsorption tower and the heat medium flow path. Therefore, the performance of the adsorbent in the temperature swing type physical adsorption device is determined by the heat transfer to the adsorbent located away from the carbon dioxide adsorption tower and the heat medium flow path, and the heat transfer to the adsorbent in contact with the carbon dioxide adsorption tower and the heat medium flow path. However, the heat energy of the heat medium decreases while being transferred between the adsorbents toward the center of the carbon dioxide adsorption tower. Therefore, the adsorbent located away from the carbon dioxide adsorption tower and the heat transfer medium flow path has poorer heat transfer than the adsorbent in contact with the carbon dioxide adsorption tower and the heat transfer medium flow path, and is unable to fully exhibit its performance. [Means for solving the problem]

[0006] A temperature swing type physical adsorption device that has been made to solve the above problems is configured as follows: (1) a shell through which a cooling medium and a heating medium flow in a switched manner; a tube that penetrates the shell and is capable of heat exchange with the cooling medium and the heating medium, the tube through which a carbon dioxide-containing gas flows when the cooling medium flows through the shell and through which a purge gas flows when the heating medium flows through the shell; and an adsorption member disposed inside the tube, wherein the adsorption member has a base material that separates the flow passage of the tube, and an adsorption section provided in an area separated by the base material, the adsorption section having an adsorption layer that adsorbs carbon dioxide at a first temperature and desorbs the adsorbed carbon dioxide at a second temperature that is higher than the first temperature.

[0007] In the temperature swing physical adsorption device having the above configuration, when a cooling medium or a heating medium flows through the shell, the heat of the cooling medium or the heating medium is transferred to the tube. The flow passage of the tube is partitioned by the base material of the adsorption member, and an adsorption section is provided in the partitioned area. The heat transferred to the tube is transferred to the base material and the adsorption section. Therefore, the adsorption layer located away from the tube changes in temperature by transferring the heat of the cooling medium and the heating medium in the same way as the adsorption layer located near the tube. Therefore, the temperature swing physical adsorption device having the above configuration can fully demonstrate the performance of the entire adsorption section arranged in the tube.

[0008] (2) In the temperature swing type physical adsorption device described in (1), the substrate is preferably formed in a roll shape or a honeycomb shape.

[0009] The thermal swing physical adsorption device having the above configuration has good thermal conductivity to the adsorption section, and can reduce pressure loss that occurs in the adsorption member when the carbon dioxide-containing gas and the purge gas flow through the tube.

[0010] (3) In the temperature swing type physical adsorption device described in (1) or (2), it is preferable that a heat transfer tube is provided that penetrates the center of the adsorption member and is disposed inside the tube, and a heating medium and a cooling medium are alternately circulated through the heat transfer tube.

[0011] According to the temperature swing type physical adsorption device having the above-described configuration, heat from the cooling medium and the heating medium is transferred from the center of the adsorption member as well, so that the adsorption portion disposed inside the tube can more easily exhibit its performance.

[0012] (4) In the temperature swing type physical adsorption device described in any one of (1) to (3), it is preferable that a straightening member for straightening the flow of the cooling medium and the heating medium is disposed between the shell and the tube.

[0013] In the temperature swing physical adsorption device having the above-described configuration, the straightening member suppresses uneven flow and reduction in flow rate of the cooling medium and heating medium flowing through the shell, and the heat of the cooling medium and heating medium can be efficiently transferred to the adsorption member via the tube.

[0014] (5) In the temperature swing type cooling device described in any one of (1) to (4), it is preferable that the adsorption member has a plurality of divided members, is formed of a heat-transferable material, and has a heat transfer member arranged between the divided members while being in contact with the inner surface of the tube.

[0015] According to the temperature swing physical adsorption device having the above-described configuration, the heat of the cooling medium and the heating medium can be transferred to the end faces of the multiple segments via the heat transfer member, so that the adsorption section in each segment located away from the tube undergoes a temperature change due to the heat of the cooling medium and the heating medium being transferred thereto in the same manner as the adsorption section located near the tube, and the entire adsorption section located inside the tube can fully demonstrate its performance.

[0016] (6) In the temperature swing type physical adsorption device described in any one of (1) to (5), it is preferable that the adsorption member is rod-shaped with a diameter smaller than that of the tube, a plurality of adsorption members are arranged on the tube, and a thermal conductive agent is filled in the gap formed between the adsorption member and the tube.

[0017] In the temperature swing physical adsorption device having the above configuration, for example, when the tube has a large diameter, multiple adsorption members having a smaller diameter than the tube are placed inside the tube, and a thermal conductive agent is filled in the gaps between them. In this way, the heat of the cooling medium and heating medium flowing through the shell is transferred to each adsorption member via the tube and the thermal conductive agent. Since each adsorption member has a smaller diameter than the tube, the heat of the cooling medium and heating medium is more easily transferred to the center than when an adsorption member having the same diameter as the tube is placed inside the tube. Therefore, with the temperature swing physical adsorption device having the above configuration, even when the tube has a large diameter, the entire adsorption section placed inside the tube can fully demonstrate its performance.

[0018] (7) In the temperature swing type physical adsorption device described in any one of (1) to (6), it is preferable that the tubes are arranged along the flow direction of the cooling medium and the heating medium flowing through the shell, and the cross-sectional area of ​​the flow path on the downstream side in the flow direction is smaller than the cross-sectional area of ​​the flow path on the upstream side.

[0019] With the temperature swing type physical adsorption device having the above-described configuration, even if the thermal energy transferred from the cooling medium and heating medium to the tube is smaller downstream than upstream, the heat of the cooling medium and heating medium is easily transferred to the center of the adsorption member, so that the entire adsorption section placed inside the tube can perform sufficiently.

[0020] (8) In the temperature swing type physical adsorption device described in any one of (1) to (7), it is preferable that the base material has a plurality of holes, the adsorption parts are provided in the plurality of holes, and the adsorption member has a greater density of holes on the downstream side of the tube than on the upstream side.

[0021] In the temperature swing type physical adsorption device having the above configuration, even if the thermal energy transferred from the cooling medium and the heating medium is smaller on the downstream side of the tube than on the upstream side, the heat is easily transferred to the adsorption section located at the center of the adsorption member.

[0022] (9) In the temperature swing type physical adsorption device according to any one of (1) to (8), it is preferable that the tube has an outer circumferential surface provided with projections and recesses or fins.

[0023] In the temperature swing type physical adsorption device having the above configuration, the area of ​​the tube that exchanges heat with the cooling medium and the heating medium increases, and the heat of the cooling medium and the heating medium is easily transferred to the adsorption section located at the center of the adsorption member.

[0024] (10) In the temperature swing type physical adsorption device according to any one of (1) to (9), the heating medium is preferably steam.

[0025] According to the temperature swing type physical adsorption device having the above-described configuration, the adsorption section disposed within the tube can be heated by utilizing not only sensible heat but also latent heat.

[0026] (11) In the temperature swing type physical adsorption device according to any one of (1) to (10), it is preferable that the base material is made of or is mixed with a thermally conductive material.

[0027] According to the temperature swing type physical adsorption device having the above-described configuration, the base material to which the heat of the cooling medium and the heating medium is transferred via the tube has thermal conductivity, so that the heat of the cooling medium and the heating medium can be transferred to the adsorption section located away from the tube in the same way as the adsorption section located near the tube.

[0028] (12) In the temperature swing type physical adsorption device described in any one of (1) to (11), it is preferable that the adsorption section is integrally provided on a surface of the substrate that contacts the carbon dioxide-containing gas and the purge gas.

[0029] According to the temperature swing type physical adsorption device having the above configuration, heat from the cooling medium and the heating medium is transferred to the adsorption section via the surface wall of the substrate, so that it is easy to change the temperature of the adsorption section disposed within the tube uniformly.

[0030] (13) In the temperature swing type physical adsorption device described in any one of (1) to (12), it is preferable that the adsorption section is a member having a hollow section, and a plurality of the adsorption sections are arranged in the area partitioned by the base material, and the carbon dioxide-containing gas and the purge gas introduced into the tube flow through the hollow section of the adsorption section and a gap formed between the inner wall of the hole and the adsorption section.

[0031] The temperature swing type physical adsorption device having the above configuration is expected to increase the packing amount of the adsorption section disposed in the tube, thereby improving the carbon dioxide adsorption capacity.

[0032] (14) In the temperature swing type physical adsorption device according to any one of (1) to (13), it is preferable that the base material has thermal conductivity and is in direct or indirect contact with the inner surface of the tube.

[0033] In a temperature swing type physical adsorption device having the above-described configuration, heat transferred from the cooling medium and heating medium to the tube is transferred to the substrate from the contact portion between the tube and substrate, and then transferred from the substrate to the adsorption section, so that the adsorption section inside the tube receives heat almost uniformly, thereby enabling the device to perform at its full potential. Effect of the Invention

[0034] According to the technology disclosed in this specification, in a temperature swing type physical adsorption device that adsorbs and desorbs carbon dioxide in response to temperature changes, it is possible to make the entire adsorption section exhibit sufficient performance. [Brief description of the drawings]

[0035] [Figure 1] FIG. 1 is a schematic diagram of a temperature swing type physical adsorption device in a first embodiment. [Diagram 2] 2 is a cross-sectional view taken along line AA in FIG. 1. [Diagram 3] 3 is an enlarged view of the tube and the adsorption member shown in part B of FIG. 2. [Figure 4] FIG. 2 is an explanatory diagram of the operation of a temperature swing type physical adsorption device. [Diagram 5] FIG. 11 is a schematic diagram of an adsorption member used in a temperature swing type physical adsorption device in a second embodiment. [Figure 6] FIG. 13 is a diagram illustrating the arrangement of an adsorption member used in a temperature swing type physical adsorption device in a third embodiment. [Figure 7] 7 is a cross-sectional view taken along CC in FIG. 6. [Figure 8] FIG. 13 is a schematic diagram of a temperature swing type physical adsorption device in a fourth embodiment. [Figure 9] FIG. 13 is a schematic diagram of a temperature swing type physical adsorption device in a fifth embodiment. [Figure 10]FIG. 13 is a schematic diagram of a temperature swing type physical adsorption device in a sixth embodiment. [Figure 11] 11A to 11C are diagrams illustrating the structure of the adsorption part shown in FIG. 10. [Figure 12] 13A and 13B are diagrams illustrating modified examples of the attraction member. [Figure 13] 13 is a table illustrating modified examples of the flow direction of a fluid. [Figure 14] 10 is a graph showing the relationship between pressure and adsorption amount for each temperature of the adsorption member. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0036] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a temperature swing type physical adsorption device will be described with reference to the drawings. This specification discloses a temperature swing type physical adsorption device that adsorbs carbon dioxide at room temperature and desorbs it at a high temperature.

[0037] (First embodiment) 1 is installed in, for example, a thermal power plant and used to remove carbon dioxide from exhaust gas. The temperature swing physical adsorption device 1 may also be used in places other than a thermal power plant, such as factories, or to remove carbon dioxide from the atmosphere.

[0038] The temperature swing type physical adsorption device 1 includes a shell 2 , a tube 3 , an adsorption member 4 , a straightening member 5 , and a heat transfer tube 6 .

[0039] In the shell 2, both end openings of the cylindrical portion 21 are closed by a first closing plate 22 and a second closing plate 23. A first port 22a is provided at the top of the first closing plate 22. A second port 23a is provided at the bottom of the second closing plate 23. In this embodiment, the heating medium and the cooling medium are switched and introduced into the first port 22a. The heating medium may be heated by the heat of the exhaust gas or may be heated by a heating device such as a burner. When the heat of the exhaust gas is used, the energy for generating the heating medium can be reduced.

[0040] A plurality of tubes 3 are provided penetrating the shell 2. The plurality of tubes 3 are arranged along the flow direction of the heating medium and the cooling medium flowing through the shell 2. The plurality of tubes 3 are arranged at intervals. The heating medium and the cooling medium can flow between the plurality of tubes 3. In this embodiment, there are two tubes 3, but the number of tubes 3 is not limited to this embodiment.

[0041] An adsorption member 4 and a heat transfer tube 6 are disposed inside the tube 3. The adsorption member 4 is disposed across an area corresponding to the shell 2. The adsorption member 4 has an outer diameter approximately equal to the inner diameter of the tube 3, and is inserted into the flow passage 3a of the tube 3. The heat transfer tube 6 is thinner than the tube 3, and is disposed penetrating the center of the adsorption member 4.

[0042] Exhaust gas generated in a thermal power plant and purge gas are introduced into the tube 3 in a switched manner. Exhaust gas is an example of a "carbon dioxide-containing gas". The purge gas is, for example, a cooling medium or nitrogen gas. The adsorption member 4 has a plurality of holes 41a formed along the axial direction as described below. The exhaust gas and purge gas introduced into the tube 3 can pass through the adsorption member 4 via the plurality of holes 41a. A heating medium and a cooling medium are alternately circulated through the heat transfer tube 6.

[0043] The tube 3 and the heat transfer tube 6 are made of a material having high thermal conductivity, such as metal, carbon, alumina ceramic, silicon carbide, etc., and are capable of transferring the heat of the heating medium and the cooling medium to the adsorption member 4 .

[0044] A straightening member 5 is disposed between the shell 2 and the tubes 3. As shown in Fig. 2, the straightening member 5 has a plurality of straightening plates 51 arranged along the flow direction of the heating medium and the cooling medium. The plurality of straightening plates 51 are arranged at predetermined intervals, and a medium flow path 52 for circulating the heating medium and the cooling medium is formed between the straightening plates 51.

[0045] As shown in FIGS. 2 and 3, the adsorption member 4 includes a substrate 45 and an adsorption layer .

[0046] The base material 45 has thermal conductivity, and is made of or mixed with materials with high thermal conductivity, such as metals (iron, aluminum, copper, etc.), carbon, alumina ceramic, silicon carbide, carbon fiber, etc. For example, under a condition of 300 K, the thermal conductivity of alumina is 36 W / m·K, that of iron is 80 W / m·K, that of aluminum is 237 W / m·K, that of silicon carbide is 280 W / m·K or less, that of copper is 398 W / m·K, and that of carbon fiber is 800 W / m·K or less.

[0047] As shown in FIG. 2, the base material 45 includes a core material 41, an outer cylinder 43, and an inner cylinder .

[0048] The core material 41 has a doughnut-shaped (annular) cross section cut in the axial direction. The core material 41 has a plurality of holes 41a formed along the axial direction. The holes 41a in this embodiment have a regular hexagonal cross section cut in a direction perpendicular to the axial direction and are regularly arranged. In other words, the core material 41 has a honeycomb shape. This increases the contact area between the exhaust gas and the purge gas and the adsorption member 4. The base material 45 is disposed in the tube 3 so as to partition the flow passage 3a of the tube 3 along the axial direction of the tube 3 so that the exhaust gas and the purge gas introduced into the tube 3 can pass through the tube 3 without impairing the flow of the exhaust gas and the purge gas introduced into the tube 3.

[0049] The outer cylinder 43 and the inner cylinder 44 are joined to the outer periphery and inner periphery of the core material 41, respectively, to reinforce the core material 41. The core material 41 is joined by, for example, welding or bonding using a thermally conductive adhesive.

[0050] As shown in Fig. 3, a heat conductive agent is applied between the tube 3 and the outer tube 43 of the base material 45, and the base material 45 is in indirect contact with the inner circumferential surface 3b of the tube 3 via the heat transfer layer 8. Similarly, as shown in Fig. 2, a heat conductive agent is applied between the heat transfer tube 6 and the inner tube 44 of the adsorption member 4, and the base material 45 is in indirect contact with the outer circumferential surface 6c of the heat transfer tube 6 via a heat transfer layer (not shown). The heat conductive agent is, for example, heat transfer grease, heat conductive resin, or carbon fiber mate.

[0051] As shown in FIG. 3, in the substrate 45, an adsorbent powder is applied to the inner wall 41b of the hole 41a, and the adsorption layer 42 is integrally provided on the inner wall 41b. The adsorbent is, for example, zeolite, silica gel, activated carbon, or MOF (Metal Organic Framework). The hole 41a is an example of an "area partitioned by the substrate". The adsorption layer 42 is an example of an "adsorption section". The adsorbent may be impregnated into the inner wall 41b of the hole 41a. In this case, the inner wall 41b of the hole 41a impregnated with the adsorbent is an example of an "adsorption section".

[0052] Next, we will explain the operation of the temperature swing type physical adsorption device 1. The temperature swing type physical adsorption device 1 removes and recovers carbon dioxide from the exhaust gas by repeating an adsorption step in which the adsorption member 4 adsorbs carbon dioxide, a regeneration step in which the adsorption member 4 is regenerated, and a cooling step in which the adsorption member 4 is cooled.

[0053] Specifically, in the adsorption step, as shown in Fig. 4(a), the temperature swing type physical adsorption device 1 circulates a cooling medium through the shell 2 and the heat transfer tubes 6 to cool the adsorption layer 42 to a "first temperature", thereby adsorption of carbon dioxide proceeds. The cooling medium is assumed to be, for example, air or water at room temperature (e.g., 20 to 25°C). The temperature of the cooling medium is an example of the "first temperature".

[0054] In the adsorption member 4, the heat of the cooling medium flowing through the tube 3 and the heat transfer tube 6 is transferred to the outer tube 43 and the inner tube 44 of the base material 45, respectively, and is then transferred from the outer tube 43 and the inner tube 44 to the core material 41. As a result, the entire base material 45 and the entire adsorption layer 42 reach approximately the same temperature (20 to 25°C) as the cooling medium. In this state, exhaust gas at room temperature is introduced into the tube 3. The exhaust gas flows through each hole 41a and is discharged from the adsorption member 4.

[0055] The inner wall 41b of each hole 41a has a temperature (20 to 25°C) similar to that of the cooling medium. The adsorption layer 42 is provided on the inner wall 41b. Therefore, the adsorption layer 42 disposed in the tube 3, even the adsorption layer 42 located away from the heat transfer tube 6, receives heat from the cooling medium and has a temperature (20 to 25°C) similar to that of the cooling medium, as in the case of the adsorption layer 42 located near the tube 3 and the heat transfer tube 6. For example, as shown in FIG. 14, the adsorbent contained in the adsorption layer 42 has a large adsorption amount at 20°C. Therefore, the adsorption layer 42 provided in each hole 41a of the adsorption member 4 can exert its inherent adsorption ability to selectively adsorb and remove carbon dioxide from the exhaust gas flowing through each hole 41a.

[0056] The removed gas obtained by removing carbon dioxide from the exhaust gas in the adsorption member 4 is, for example, released into the atmosphere. The adsorption member 4 generates heat when adsorbing carbon dioxide. In this embodiment, a cooling medium is constantly circulated through the tube 2 and the heat transfer tube 6 during the adsorption process. Therefore, the adsorption member 4 is cooled. Therefore, the adsorption layer 42 is cooled to approximately the same temperature as the cooling medium (20 to 25°C) during the adsorption process, and can exert its original adsorption capacity.

[0057] For example, when the adsorption step has been performed for a predetermined time, or when a predetermined volume of exhaust gas has been circulated through the tubes 3, the temperature swing type physical adsorption device 1 performs a regeneration step as shown in FIG. 4(b). In the regeneration step, the temperature swing type physical adsorption device 1 circulates a heating medium through the shell 2 and the heat transfer tubes 6 to heat the adsorption layer 42 to a "second temperature", thereby progressing the desorption of carbon dioxide. The heating medium is assumed to be, for example, steam (100°C). The heating medium may also be hot water or the like. The temperature of the heating medium (for example, 100°C) is an example of the "second temperature".

[0058] The heating medium is rectified by the rectifying member 5, and is unlikely to drift or experience a decrease in flow rate when flowing from the first port 22a to the second port 23a. In addition, the heating medium flows from the first port 22a provided in the upper part of the first closure plate 22 toward the second port 23a provided in the lower part of the second closure plate 23, so that the heating medium comes into contact with the multiple tubes 3 evenly. Therefore, the adsorption member 4 exchanges heat with the heating medium flowing through the shell 2 uniformly from the upstream side to the downstream side through the tubes 3 and the outer cylinder 43, and is heated from the outer peripheral surface side.

[0059] Moreover, the heating medium passes through the adsorption member 4 along the central axis thereof, and flows through the heat transfer tube 6 inserted into the tube 3. Therefore, the adsorption member 4 exchanges heat evenly with the heating medium flowing through the heat transfer tube 6 via the inner cylinder 44, and is heated from the center portion away from the tube 3.

[0060] The tube 3 and the heat transfer tube 6 are formed using or mixing materials with high thermal conductivity, so that the heat of the heating medium flowing through the shell 2 and the heat transfer tube 6 is easily transferred to the base material 45 of the adsorption member 4 via the tube 3 and the heat transfer tube 6.

[0061] Moreover, in the adsorption member 4, the outer cylinder 43 and the inner cylinder 44 of the base material 45 are in contact with the tube 3 and the heat transfer tube 6 without any gaps, respectively, via the heat transfer layer 8. Therefore, in the adsorption member 4, the heat of the heating medium is transferred to the base material 45 via the tube 3 and the heat transfer tube 6 without any waste.

[0062] The base material 45 is formed by using or mixing a material with high thermal conductivity. Therefore, the base material 45 easily transfers the heat of the heating medium transferred from the tube 3 and the heat transfer tube 6 to the outer cylinder 43 and the inner cylinder 44 to the core material 41. Furthermore, the core material 41 easily transfers the heat of the heating medium from the portion joined to the outer cylinder 43 and the inner cylinder 44 to the portion away from the outer cylinder 43 and the inner cylinder 44. Therefore, the inner wall 41b of each hole 41a easily reaches the same temperature (100°C) as the heating medium.

[0063] In the adsorption member 4, heat from the heating medium is transferred from the inner walls 41b of each hole 41a to the adsorption layer 42, and the adsorption layer 42 provided in each hole 41a reaches a temperature (100°C) similar to that of the heating medium. In other words, even the adsorption layer 42 located away from the tube 3 and the heat transfer tube 6 receives the heat of the heating medium and is heated in the same manner as the adsorption layer 42 located near the tube 3 and the heat transfer tube 6. Therefore, the entire adsorption layer 42 arranged in the tube 3 is heated to a temperature (100°C) similar to that of the heating medium, and can fully exhibit its performance of releasing and regenerating the adsorbed carbon dioxide.

[0064] When the heating fluid is steam, not only sensible heat but also latent heat can be utilized to heat the adsorption layer 42 disposed within the tube 3 .

[0065] Thereafter, the purge gas is introduced into the tube 3 and flows through a plurality of holes 41a provided in the adsorption member 4. At this time, the carbon dioxide desorbed from the adsorption layer 42 is pushed out from the holes 41a together with the purge gas. This prevents the carbon dioxide desorbed from the adsorption layer 42 from being re-adsorbed into the adsorption layer 42. The mixed gas of the carbon dioxide and the purge gas discharged from the adsorption member 4 is recovered, for example, in a recovery tank for storing carbon dioxide.

[0066] For example, when the regeneration step has been performed for a predetermined time, or when the carbon dioxide concentration of the mixed gas becomes equal to or lower than a predetermined value, temperature swing type physical adsorption device 1 performs the cooling step. During the cooling step, a cooling medium flows through shell 2 and heat transfer tubes 6 in temperature swing type physical adsorption device 1.

[0067] The cooling medium is rectified by the rectifying member 5 in the same manner as when the heating medium flows, and uneven flow and a decrease in flow rate are suppressed. Moreover, the cooling medium is in contact with the multiple tubes 3 evenly in the same manner as when the heating medium flows. Therefore, the heat of the cooling medium flowing through the shell 2 is transferred to the outer casing 43 via the tubes 3 from the upstream side to the downstream side, and the adsorption member 4 is cooled from the outer periphery.

[0068] Moreover, in the same manner as when a heating medium flows, the heat of the cooling medium is transferred through the heat transfer tubes 6 to the inner tube 44 of the adsorption member 4. As a result, the adsorption member 4 is cooled from its center.

[0069] Since the tubes 3, the heat transfer tubes 6, and the base material 45 are formed using or mixing materials with high thermal conductivity, the heat of the cooling medium is easily transferred to the base material 45 via the tubes 3 and the heat transfer tubes 6, and is easily transferred from the portion of the base material 45 that contacts the tubes 3 and the heat transfer tubes 6 to the portion of the base material 45 that is distant from the tubes 3 and the heat transfer tubes 6. Therefore, the entire base material 45 can be easily cooled to the same temperature (20 to 25°C) as the cooling medium.

[0070] Moreover, since the outer tube 43 and the inner tube 44 of the base material 45 are in contact with the tube 3 and the heat transfer tube 6 without any gaps via the heat transfer layer 8, the heat of the cooling medium is easily transferred via the tube 3 and the heat transfer tube 6 without waste.

[0071] In the base material 45, the inner walls 41b of the holes 41a are easily cooled to a temperature nearly equal to that of the cooling medium. Therefore, the adsorption layers 42 from which carbon dioxide has been desorbed by heating are cooled to a temperature nearly equal to that of the cooling medium up to the adsorption layers 42 located away from the tubes 3 and the heat transfer tubes 6, and can return to a state in which they can adsorb carbon dioxide.

[0072] During the cooling step, the purge gas may or may not continue to flow through the tube 3. By continuing to flow the purge gas through the tube 3, the adsorption layer 42 can be prevented from re-adsorbing carbon dioxide even during the cooling step, so that the adsorption capacity of the adsorption layer 42 can be easily restored.

[0073] Thereafter, the temperature swing type physical adsorption device 1 executes the adsorption step again. At this time, the adsorption member 4, including the adsorption layers 42 located away from the tubes 3 and the heat transfer tubes 6, is cooled to the same temperature as the cooling medium (20 to 25° C.) as the adsorption layers 42 located near the tubes 3 and the heat transfer tubes 6, so that all the adsorption layers 42 located inside the tubes 3 can fully exhibit their adsorption performance.

[0074] As described above, in the temperature swing type physical adsorption device 1 of this embodiment, when a cooling medium or a heating medium flows through the shell 2, the heat of the cooling medium or the heating medium is transferred to the tube 3. The flow passage 3a of the tube 3 is partitioned by the base material 45 of the adsorption member 4, and the adsorption layer 42 is provided in the partitioned area. The heat transferred to the tube 3 is transferred to the base material 45 and the adsorption layer 42. Therefore, the adsorption layer 42 located away from the tube 3 undergoes a temperature change by the heat of the cooling medium and the heating medium transferred thereto, similar to the adsorption layer 42 located near the tube 3. Therefore, according to the temperature swing type physical adsorption device 1 of this embodiment, the performance of the entire adsorption layer 42 arranged in the tube 3 can be fully exhibited.

[0075] In addition, in the temperature swing type physical adsorption device 1 of this embodiment, since the base material 45 is formed in a honeycomb shape, the adsorption member 4 is disposed throughout the flow passage 3a of the tube 3. This provides good thermal conductivity to the adsorption layer 42. In addition, it is possible to reduce the pressure loss that occurs in the adsorption member 4 when the exhaust gas and the purge gas flow through the tube 3.

[0076] Second embodiment Next, a second embodiment of the temperature swing type physical adsorption device will be described. In the temperature swing type physical adsorption device of this embodiment, as shown in Fig. 5, an adsorption member 104 made up of a plurality of divided members 1041A, 1041B, 1041C, and 1041D is disposed inside a tube 3. This point differs from the temperature swing type physical adsorption device 1 of the first embodiment in which an adsorption member 4 made up of a single part is disposed inside a tube 3. Below, the points different from the first embodiment will be mainly described, and the points in common with the first embodiment will be denoted by the same reference numerals as in the first embodiment in the drawings and description, and the description will be omitted as appropriate.

[0077] As shown in Fig. 5, the adsorption member 104 in this embodiment is divided into four in the axial direction, and includes divided members 1041A, 1041B, 1041C, and 1041D. The number of divisions is not limited to this embodiment. The divided members 1041A, 1041B, 1041C, and 1041D in this embodiment are formed to have the same shape. Hereinafter, unless there is a particular need to distinguish between them, the divided members 1041A, 1041B, 1041C, and 1041D will be collectively referred to as "divided members 1041".

[0078] The divided member 1041 includes a base material 45 in which an outer cylinder 43 is bonded to the outer peripheral surface of a core material 41 having a plurality of holes 41a. An adsorption layer 42 is provided on the inner walls 41b of the holes 41a.

[0079] Heat transfer members 105A, 105B, and 105C are provided between the divided members 1041A, 1041B, 1041C, and 1041D. The heat transfer members 105A, 105B, and 105C have the same configuration, and will be collectively referred to as "heat transfer member 105" in the following description unless there is a need to distinguish them from one another.

[0080] The heat transfer member 105 is formed of a material with high thermal conductivity, such as metal, and is provided in a disk shape. It is desirable to form the heat transfer member 105 from a material with thermal conductivity equal to or higher than that of the base material 45. The heat transfer member 105 is formed in a mesh shape, and exhaust gas and purge gas can pass between the divided members 1041. The heat transfer member 105 of this embodiment is disposed inside the tube 3 in a state in which it contacts the inner circumferential surface 3b of the tube 3 and the end faces of the adjacent divided members 1041.

[0081] In the temperature swing type physical adsorption device of this embodiment, when a cooling medium or a heating medium is circulated through shell 2, heat of the cooling medium or heating medium is transferred to partition material 1041 and heat transfer member 105 via tube 3. As in the first embodiment, adsorption layer 42 of partition material 1041 is cooled or heated, regenerating or exhibiting its adsorption capacity.

[0082] A heat conductive agent may be applied between the inner circumferential surface 3b of the tube 3 and the outer casing 43 of the divided member 1041. In this case, the heat of the cooling medium and the heating medium flowing through the shell 2 is easily transferred to the divided member 1041 via the tube 3. A heat conductive agent may be applied between the heat transfer member 105 and the inner circumferential surface 3b of the tube 3, and between the heat transfer member 105 and the end face of the divided member 1041. In this case, the heat of the cooling medium and the heating medium flowing through the shell 2 is easily transferred to the divided member 1041 via the tube 3 and the heat transfer member 105.

[0083] As described above, according to the temperature swing type physical adsorption device of this embodiment, the heat of the cooling medium and the heating medium can be transferred via the heat transfer member 105 to the end face of the divided material 1041, which includes the plurality of holes 41a and the adsorption layer 42. Therefore, the adsorption layer 42 located away from the inner circumferential surface 3b of the tube 3 undergoes a temperature change by the heat of the cooling medium and the heating medium being transferred thereto, in the same way as the adsorption layer 42 located near the inner circumferential surface 3b of the tube 3, and all the adsorption layers 42 arranged inside the tube 3 can fully exhibit their performance.

[0084] Third embodiment Next, a third embodiment of the temperature swing type physical adsorption device will be described. In this embodiment, as shown in Fig. 6 and Fig. 7, a plurality of adsorption members 304 are arranged inside the tube 3. This is different from the temperature swing type physical adsorption device 1 of the first embodiment in which only one adsorption member 4 is arranged inside the tube 3. Below, the differences from the first embodiment will be mainly described, and the same reference numerals as in the first embodiment will be used in the drawings and description for the points in common with the first embodiment, and the description will be omitted as appropriate.

[0085] If only one adsorption member is placed inside a tube 3 with a large diameter, the adsorption member will also be large, and it may become difficult for the heat from the cooling medium and heating medium circulating through the shell 2 to be transmitted through the tube 3 to the center of the adsorption member.

[0086] In contrast, in the temperature swing type physical adsorption device of this embodiment, a plurality of adsorption members 304 are arranged in the tube 3. Specifically, the adsorption members 304 are rod-shaped with a diameter smaller than that of the tube 3. The plurality of adsorption members 304 are bundled and inserted into the tube 3. The number of adsorption members 304 is not limited to that of this embodiment. A thermally conductive agent is applied to the gap between the inner circumferential surface 3b of the tube 3 and the plurality of adsorption members 304, and a heat transfer layer 8 is formed.

[0087] The adsorption member 304 is configured by bonding an outer cylinder 43 to the outer peripheral surface of a core material 341 having a plurality of holes 41a to form a base material 345. An adsorption layer 42 is provided on the inner wall 41b of each hole 41a.

[0088] In the temperature swing physical adsorption device of this embodiment, the heat of the cooling medium and the heating medium flowing through the shell 2 is transferred to the outer cylinder 43 of each adsorption member 304 through the tube 3 and the heat transfer layer 8, and is further transferred from each outer cylinder 43 to the center of the core material 341. Since the adsorption member 304 has a smaller diameter than the tube 3, the heat of the cooling medium and the heating medium is more easily transferred to the center than when an adsorption member having the same diameter as the tube 3 is placed inside the tube. Each core material 341 transfers the heat of the cooling medium and the heating medium to the adsorption layer 42 through the inner wall 41b of the hole 41a, and uniformly cools and heats the adsorption layer 42. Therefore, according to this embodiment, even if the diameter of the tube 3 is large, all the adsorption layers 42 placed inside the tube 3 can fully exhibit their performance.

[0089] (Fourth embodiment) Next, a fourth embodiment of the temperature swing type physical adsorption device will be described. In this embodiment, as shown in Fig. 8, the diameters of the tube 3 and the adsorption member 404 are different between the upstream side and the downstream side. This is different from the temperature swing type physical adsorption device 1 of the first embodiment in which the diameters of the tube 3 and the adsorption member 4 are constant from the upstream side to the downstream side. Below, the differences from the first embodiment will be mainly described, and the same reference numerals as in the first embodiment will be used in the drawings and description for the points in common with the first embodiment, and the description will be omitted as appropriate.

[0090] When a cooling medium is circulated through the shell 2, the cooling medium absorbs heat from the adsorption member through the tube. Therefore, the temperature of the cooling medium flowing along the tube becomes higher the further downstream it flows, and the transfer of cold heat becomes poor. Also, when a heating medium is circulated through the shell 2, the heating medium dissipates heat to the adsorption member through the tube. Therefore, the temperature of the heating medium flowing along the tube becomes lower the further downstream it flows, and the transfer of hot heat becomes poor.

[0091] In contrast, in the temperature swing type physical adsorption device of this embodiment, the diameter of tubes 403 arranged along the flow direction of the cooling medium and heating medium circulating in shell 2 is made smaller from the upstream side to the downstream side with respect to the flow direction of the cooling medium and heating medium. Therefore, the flow path cross-sectional area of ​​tube 403 is smaller on the downstream side than on the upstream side. Except for this, tube 403 is configured similarly to tube 3 of the first embodiment.

[0092] The adsorption member 404 has a smaller diameter from the upstream side to the downstream side in the flow direction of the cooling medium and the heating medium according to the diameter of the tube 403. Therefore, the cross-sectional area of ​​the adsorption member 404 cut in a direction perpendicular to the axial direction is smaller on the downstream side than on the upstream side. The adsorption member 404 is disposed in the tube 403 in a state of contacting the inner circumferential surface 403b of the tube 403. The adsorption member 404 has a plurality of holes 41a similar to the adsorption member 4 of the first embodiment, and an adsorption layer 42 is provided on the inner wall 41b of each hole 41a. The adsorption member 404 of this embodiment has a smaller hole 41a according to the reduction in diameter.

[0093] In such a temperature swing type physical adsorption device of this embodiment, the diameter or flow path cross-sectional area of ​​tube 403 and adsorption member 404 is smaller on the downstream side where heat transfer of the cooling medium and heating medium is poorer than on the upstream side where heat transfer is good, so that heat of the cooling medium and heating medium is more likely to be transferred from the upstream side to the downstream side to the center of adsorption member 404. Therefore, in adsorption member 404, adsorption layer 42 arranged on inner wall 41b of each hole 41a is cooled and heated almost uniformly.

[0094] Thus, according to the temperature swing type physical adsorption device of this embodiment, even if the thermal energy transferred from the cooling medium and heating medium to tube 403 is smaller downstream than upstream, the heat of the cooling medium and heating medium is easily transferred to the center of adsorption member 404, so that all adsorption layers 42 arranged within tube 403 can fully perform.

[0095] Fifth embodiment Next, a fifth embodiment of the temperature swing type physical adsorption device will be described. In this embodiment, as shown in Fig. 9, tube 503 is provided with fins 5031. This is different from temperature swing type physical adsorption device 1 of the first embodiment in which tube 3 is not provided with fins. Below, the differences from the first embodiment will be mainly described, and the same reference numerals as in the first embodiment will be used in the drawings and description for the points in common with the first embodiment, and the description will be omitted as appropriate.

[0096] A plurality of fins 5031 are provided on the outer circumferential surface of the tube 503 so as to protrude radially outward. The fins 5031 are formed from the same material as the tube 503 or a material having a higher thermal conductivity than the tube 503, and are provided integrally with the outer circumferential surface of the tube 503. Except for this, the tube 503 is configured similarly to the tube 3.

[0097] In the temperature swing type physical adsorption device of this embodiment, tube 503 can exchange heat with the cooling medium and heating medium not only through the outer circumferential surface but also through fins 5031. Therefore, tube 503 has an increased area for heat exchange with the cooling medium and heating medium compared to tube 3 without fins. Therefore, the thermal energy transferred to adsorption member 4 is greater in tube 503 with fins 5031 than in tube 3 without fins. Therefore, according to the temperature swing type physical adsorption device of this embodiment, the heat of the cooling medium and heating medium is easily transferred to adsorption layer 42 in the center of adsorption member 4.

[0098] Fins 5031 in this embodiment protrude in a direction perpendicular to the axial direction of tube 503. Therefore, the cooling medium and the heating medium generate turbulent flows near the surfaces of tubes 503 and are stirred, so that the temperature difference between the upstream side and the downstream side is small. Therefore, according to the temperature swing type physical adsorption device of this embodiment, even if the diameter of adsorption member 4 is the same from the upstream side to the downstream side, the center part of adsorption member 4 is likely to be cooled and heated almost uniformly by the heat of the cooling medium and the heating medium.

[0099] Sixth embodiment Next, a sixth embodiment of the temperature swing type physical adsorption device will be described. As shown in Fig. 10, the temperature swing type physical adsorption device of this embodiment has a plurality of adsorption sections 642 arranged in holes 41a of an adsorption member 604. This differs from the temperature swing type physical adsorption device 1 of the first embodiment in which an adsorption layer 42 is provided on the inner wall 41b of the hole 41a. The following description will focus on the differences from the first embodiment, and the same reference numerals as in the first embodiment will be used in the drawings and description for the points in common with the first embodiment, and the description will be omitted as appropriate.

[0100] 10, in the temperature swing type physical adsorption device of this embodiment, a plurality of adsorption parts 642 are accommodated in a bundle in hole 41a of adsorption member 604. A portion of each of the plurality of adsorption parts 642 is in contact with inner wall 41b of hole 41a and the remaining portion is in contact with other adsorption parts 642, and the plurality of adsorption parts 642 are arranged so that heat can be transferred from inner wall 41b of hole 41a to the plurality of adsorption parts 642.

[0101] 11, the adsorption part 642 has an adsorption part main body 6421 coated with or internally added with a powdered adsorbent (impregnated into the inner walls 41b of the holes 41a provided in the base material 45), forming an adsorption layer 6422. The adsorption part main body 6421 is formed by using or mixing a material having high thermal conductivity. The adsorption part main body 6421 has a hollow portion 6421a, and the adsorption layer 6422 is provided on the outer peripheral surface 6421c and the inner peripheral surface 6421b. The adsorption part 642 may have the adsorption part main body 6421 impregnated with an adsorbent.

[0102] In such a temperature swing type physical adsorption device, the heat of the cooling medium or heating medium flowing through the shell 2 is transferred to the outer casing 43 of the adsorption member 604 via the tube 3, and then transferred from the outer casing 43 to the core material 41. In the multiple adsorption sections 642 arranged in each hole 41a of the core material 41, the heat of the cooling medium or heating medium is transferred to the adsorption section 642 in contact with the inner wall 41b, and the heat is further transferred to the adjacent adsorption section 642. As a result, the multiple adsorption sections 642 arranged in each hole 41a are cooled or heated almost uniformly.

[0103] The exhaust gas or purge gas introduced into the tube 3 flows through the gaps formed between the inner walls 41b of the holes 41a and the plurality of adsorption sections 642 and through the hollow sections 6421a of the adsorption sections 642.

[0104] For example, during the adsorption process, the adsorption member 604 is adjusted to room temperature up to the center by the heat of the cooling medium. Therefore, in each of the multiple adsorption sections 642 provided in each hole 41a, the adsorption layer 6422 is at room temperature, and carbon dioxide can be efficiently adsorbed and removed from the exhaust gas flowing through the hole 41a and the hollow section 6421a.

[0105] Also, for example, during the regeneration process, the adsorption member 604 is adjusted to a high temperature even at the center by the heat of the heating medium. Therefore, the adsorption layer 6422 of each of the multiple adsorption sections 642 provided in each hole 41a becomes hot, and the adsorbed carbon dioxide is desorbed. The desorbed carbon dioxide is expelled from the hole 41a and the hollow section 6421a by the purge gas flowing through the hole 41a and the hollow section 6421a, and re-adsorption is suppressed.

[0106] In the temperature swing type physical adsorption device of this embodiment, the filling amount of the adsorption layer 6422 arranged in the tube 3 is increased, and it is expected that the carbon dioxide adsorption capacity will be improved, compared to the first embodiment in which the adsorption layer 42 is integrally provided on the inner wall 41b of the hole 41a.

[0107] The technology disclosed in this specification is not limited to the above embodiment and can be applied in various ways. The cross-sectional shapes of the tube, the adsorption member, and the heat transfer tube cut in a direction perpendicular to the axial direction are not limited to the above embodiment and may be polygonal, elliptical, or the like.

[0108] For example, the base material 45 does not have to have a honeycomb shape in which the holes 41a of the same shape are regularly arranged. For example, the holes 41a may have irregular shapes, or the holes 41a may be irregularly arranged. However, since the base material has a honeycomb shape, heat energy is transferred almost uniformly to the holes provided in each hole, so that the entire adsorption part arranged in the tube can fully exhibit its performance.

[0109] For example, as shown in FIG. 12(a), instead of the adsorption member 4, a roll-shaped adsorption member 704 may be disposed inside the tube 3 so as to partition the flow passage 3a of the tube 3 so as to allow the carbon dioxide-containing gas and the purge gas to flow along the tube 3. FIG. 12(b) is an enlarged view of part D in FIG. 12(a). As shown in FIG. 12(b), the adsorption member 704 is formed by applying an adsorbent to both sides of a thermally conductive roll-shaped base material 745, and an adsorption layer 42 is formed. The adsorption member 704 may be impregnated with an adsorbent on both sides of the roll-shaped base material 745. The adsorption member 704 is preferably accommodated in the tube 3 so as to contact the inner circumferential surface 3b of the tube 3, and heat is preferably transferred to the adsorption layer 42 disposed at the center of the tube 3. The adsorption member 704 is disposed over the entire flow passage 3a, and therefore has good thermal conductivity to the adsorption layer 42. In addition, the adsorption member 704 is less likely to cause pressure loss when the carbon dioxide-containing gas and the purge gas flow through the tube 3.

[0110] For example, the shape of the hole 41a does not have to be a regular hexagon. For example, the hole 41a may be a regular polygon other than a regular hexagon, such as an equilateral triangle, a regular square, or a regular octagon. The hole 41a does not have to be a polygon, such as a circle or an ellipse.

[0111] 1 may be omitted. However, by arranging the heat transfer tube 6 penetrating the adsorption member 4, the heat of the cooling medium and the heating medium is transferred from the center of the adsorption member 4 as well, so that the adsorption layer 42 arranged within the tube 3 can more easily exhibit its performance.

[0112] For example, the substrate may be made of a material that is easily molded into a suitable shape, such as paper or nonwoven fabric, in which case metal fibers or carbon fibers may be mixed into the nonwoven fabric to increase the thermal conductivity of the substrate.

[0113] For example, the base material 45 may be composed of only the core material 41, omitting the outer tube 43 and the inner tube 44 shown in Fig. 2. In this case, the core material 41 may be coated with a heat conductive agent between the tube 3 and the heat transfer tube 6 to form a heat transfer layer, which facilitates heat exchange with the cooling medium and the heating medium via the tube 3 and the heat transfer tube 6. However, since the base material 45 bonds the outer tube 43 and the inner tube 44 to the core material 41, the strength of the base material 45 is increased, and it is expected that the adsorption member 4 will maintain the shape of the hole portion 41a for a long period of time even if the exhaust gas or purge gas flows repeatedly, and will suppress deviations in the flow rate and reductions in the flow rate of the exhaust gas or purge gas.

[0114] For example, the heat transfer layer 8 shown in FIG. 3 may be omitted, and the outer cylinder 43 and the inner cylinder 44 of the adsorption member 4 may be in direct contact with the tube 3 and the heat transfer tube 6, respectively.

[0115] For example, instead of the adsorption layer 42, a pellet-shaped adsorbent may be disposed in the holes 41a. In this case, the pellet-shaped adsorbent is an example of an "adsorption section." However, by integrally providing the adsorption layer 42 with the inner wall 41b, the adsorption layer 42 receives heat from the cooling medium and the heating medium via the inner wall 41b of each hole 41a, so that the temperature of the adsorption layer 42 disposed in the tube 3 can be easily changed uniformly.

[0116] 1 may be omitted. However, by disposing the flow straightening member 5 between the shell 2 and the tubes 3, the flow straightening member 5 can suppress uneven flow and a decrease in flow rate of the cooling medium and heating medium flowing through the shell 2, and the heat of the cooling medium and heating medium can be efficiently transferred to the adsorption member 4 via the tubes 3.

[0117] The heat transfer member 105 shown in FIG. 5 may not be provided. In this case, a heat conductive agent may be applied between adjacent divided members 1041 to improve the heat transfer coefficient between adjacent divided members 1041. Since the adsorption member 104 is composed of a plurality of divided members 1041, it is easy to arrange the adsorption member 104 in the tube 3 according to the size of the shell 2. However, by arranging the heat transfer member 105 between the divided members 1041, the heat of the cooling medium and the heating medium can be transferred to the end face of the divided member 1041 via the heat transfer member 105. Therefore, in each divided piece, the adsorption layer 42 located away from the inner circumferential surface 3b of the tube 3 changes in temperature by transferring the heat of the cooling medium and the heating medium in the same way as the adsorption layer 42 located near the inner circumferential surface 3b of the tube 3, and the entire adsorption section arranged in the tube can fully exhibit its performance.

[0118] 5 may have different shapes. For example, the upstream divided material 1041 may have a larger density of holes 41a than the downstream divided material 1041. In this way, even if the thermal energy transferred from the cooling medium and the heating medium is smaller on the downstream side than on the upstream side of the tube 3, the heat is easily transferred to the adsorption layer at the center of the multiple divided materials 1041.

[0119] 5 may not be in contact with the heat transfer member 105. However, by bringing the divided material 1041 into contact with the heat transfer member 105, the heat of the cooling medium and the heating medium is transferred to the end surface of the divided material 1041 via the heat transfer member 105, making it easier for the divided material 1041 to be uniformly cooled or heated up to the center.

[0120] The contact area of ​​the heat transfer member 105 shown in FIG. 5 with the inner circumferential surface 3b of the tube 3 may be increased by folding the outer circumferential edge or by bonding a separate member constituting the outer circumferential edge by welding or the like.

[0121] The adsorption member 4 shown in FIG. 1 may have a higher density of holes 41a downstream than upstream with respect to the flow direction of the cooling medium and the heating medium. That is, the mesh of the adsorption member 4 may be finer downstream than upstream. In this case, the packing density of the adsorbent is higher downstream than upstream. With this configuration, even if the thermal energy transferred from the cooling medium and the heating medium is smaller downstream than upstream of the tube 3, heat is easily transferred to the adsorption layer 42 at the center of the adsorption member 4.

[0122] 9 may be formed on the outer circumferential surface of the tube 503 along the axial direction of the tube 503 to prevent turbulence in the cooling medium and heating medium flowing on the surface of the tube 503. The fin 5031 may be formed in a spiral shape on the outer circumferential surface of the tube 503 to agitate the cooling medium and heating medium while suppressing a decrease in the flow rate of the cooling medium and heating medium near the tube 503.

[0123] 9, irregularities may be provided on the outer peripheral surface of the tube 3. In this case as well, it is expected that the same effects as those of the fins 5031 can be obtained.

[0124] 11 may be omitted. However, in the adsorption unit 642 having the hollow portion 6421a, the amount of the adsorption layer 6422 in contact with the exhaust gas increases by circulating a cooling medium and a heating medium, and the carbon dioxide adsorption capacity can be improved.

[0125] As shown in FIG. 10, an adsorption layer 42 may be provided on the inner wall 41b of a hole 41a in which a plurality of adsorption portions 642 are arranged.

[0126] A heat transfer tube 6 may be disposed through the center of the dividing material 1041 and the heat transfer member 105 shown in FIG. 5 or the center of the adsorption members 304, 404 shown in FIGS. 6 and 8 to transfer heat from the cooling medium and the heating medium to those centers.

[0127] As shown in FIG. 13, the flow directions of the heating fluid, the cooling medium, the carbon dioxide-containing gas (exhaust gas), and the purge gas are not limited to the above-mentioned forms. Explaining with reference to FIG. 1 as an example, for example, as shown in 801 (the first embodiment) of FIG. 13, the heating fluid, the cooling medium, the exhaust gas (carbon dioxide-containing gas), and the purge gas may be parallel flows flowing in the same direction (from left to right). In contrast, for example, as shown in 802 of FIG. 13, the exhaust gas and the purge gas may be parallel flows flowing from left to right, and the cooling medium and the heating medium may be parallel flows flowing from right to left in the opposite direction. In other words, the exhaust gas and the purge gas may be counter flows flowing in the opposite direction to the cooling medium and the heating medium. Also, for example, as shown in 803 and 804 of FIG. 13, the exhaust gas may flow from left to right, while the purge gas may flow from right to left in the opposite direction. In other words, the exhaust gas and the purge gas may be counter flows. In this case, the cooling medium and the heating medium may be parallel flows flowing in the same direction as the exhaust gas and the purge gas, respectively, as shown in 803 in FIG. 8, or counter flows flowing in the opposite direction to the exhaust gas and the purge gas, respectively, as shown in 804 in FIG. 13. [Explanation of symbols]

[0128] 1. Temperature swing physical adsorption apparatus 3 Tubes 4. Adsorption material 42 Adsorption layer 45 Base material

Claims

1. A shell through which a cooling medium and a heating medium are switched and circulated; a tube provided to penetrate the shell and capable of exchanging heat with the cooling medium and the heating medium, wherein a carbon dioxide-containing gas flows through the tube when the cooling medium flows through the shell, and a purge gas flows through the tube when the heating medium flows through the shell; An adsorption member disposed inside the tube; having The adsorption member is A substrate that divides the flow passage of the tube; an adsorption section provided in a region partitioned by the base material, the adsorption section having an adsorption layer that adsorbs carbon dioxide at a first temperature and desorbs the adsorbed carbon dioxide at a second temperature that is higher than the first temperature; having The temperature swing physical adsorption device is configured as follows.

2. 2. The thermal swing physical adsorption device according to claim 1, The substrate is formed into a roll shape or a honeycomb shape. The temperature swing physical adsorption device is configured as follows.

3. 2. The thermal swing physical adsorption device according to claim 1, a heat transfer tube disposed inside the tube and passing through the center of the adsorption member; A heating medium and a cooling medium alternately flow through the heat transfer tube. The temperature swing physical adsorption device is configured as follows.

4. 2. The thermal swing physical adsorption device according to claim 1, A flow straightening member for straightening the cooling medium and the heating medium is disposed between the shell and the tubes. The temperature swing physical adsorption device is configured as follows.

5. 2. The temperature swing cooling device according to claim 1, The adsorption member has a plurality of divided members, a heat transfer member formed of a heat transferable material and disposed between the partitions in contact with an inner circumferential surface of the tube; The temperature swing physical adsorption device is configured as follows.

6. 2. The thermal swing physical adsorption device according to claim 1, The suction member is rod-shaped and has a diameter smaller than that of the tube, and a plurality of the suction members are arranged on the tube, A temperature swing type physical adsorption device configured such that a thermal conductive agent is filled in a gap formed between the adsorption member and the tube.

7. 2. The thermal swing physical adsorption device according to claim 1, The tubes are arranged along a flow direction of the cooling medium and the heating medium flowing through the shell, and a flow path cross-sectional area on a downstream side in the flow direction is smaller than a flow path cross-sectional area on an upstream side. The temperature swing physical adsorption device is configured as follows.

8. 2. The thermal swing physical adsorption device according to claim 1, The substrate has a plurality of holes, The suction portions are provided in the plurality of holes, The adsorption member has a higher density of holes on a downstream side of the tube than on an upstream side of the tube. The temperature swing physical adsorption device is configured as follows.

9. 2. The thermal swing physical adsorption device according to claim 1, The tube has an outer peripheral surface provided with irregularities or fins. The temperature swing physical adsorption device is configured as follows.

10. 2. The thermal swing physical adsorption device according to claim 1, The heating medium is steam. The temperature swing physical adsorption device is configured as follows.

11. 2. The thermal swing physical adsorption device according to claim 1, The substrate is made of or is mixed with a material having thermal conductivity. The temperature swing physical adsorption device is configured as follows.

12. 2. The thermal swing physical adsorption device according to claim 1, The adsorption section is integrally provided on a surface of the substrate that contacts the carbon dioxide-containing gas and the purge gas. The temperature swing physical adsorption device is configured as follows.

13. 2. The thermal swing physical adsorption device according to claim 1, the adsorption portion is a member having a hollow portion, and a plurality of the adsorption portions are arranged in the region partitioned by the base material, The carbon dioxide-containing gas and the purge gas introduced into the tube flow through the hollow portion of the adsorption section and a gap formed between the substrate and the adsorption section. The temperature swing physical adsorption device is configured as follows.

14. 2. The thermal swing physical adsorption device according to claim 1, The substrate has thermal conductivity and is in direct or indirect contact with the inner circumferential surface of the tube. The temperature swing physical adsorption device is configured as follows.

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