Flow path formation plate, gas adsorption unit, and gas adsorption device

Abstract

To provide a flow path formation plate, a gas adsorption unit, and a gas adsorption device that enable adsorption of target components with increased efficiency.SOLUTION: This flow path formation plate is used for forming a flow path of a gas adsorption unit, and comprises: a porous plate having a plurality of hole parts extending in the plate thickness direction; and a gas adsorbent disposed so as to fill the inside of each hole part. The porous plate is composed of a material having a thermal conductivity higher than the thermal conductivity of the gas adsorbent.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present disclosure relates to a flow path forming plate, a gas adsorption unit, and a gas adsorption device. [Background technology]

[0002] For example, various gas adsorption devices have been proposed to selectively recover carbon dioxide and the like from a gas. The following Patent Document 1 discloses a gas adsorption device including a heat transfer tube through which a heat transfer medium flows and a granular adsorbent packed around the heat transfer tube. For example, when adsorbing carbon dioxide from a gas, an adsorbent in which an amine is impregnated into a porous material or a resin is preferably used. It is said that carbon dioxide in the gas can be adsorbed and desorbed by the adsorbent by flowing the gas through the gas adsorption device while adjusting the temperature of the adsorbent by the heat of the heat transfer medium. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] U.S. Pat. No. 9,751,039 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the technology disclosed in Patent Document 1 has a problem that heat is not efficiently transferred to the adsorbent in an area away from the heat transfer tube, making it difficult to control the temperature. As a result, the adsorption performance of the adsorbent cannot be fully utilized, and the efficiency of the gas adsorption device decreases.

[0005] The present disclosure has been made to solve the above-mentioned problems, and aims to provide a flow path forming plate, a gas adsorption unit, and a gas adsorption device capable of adsorbing and desorbing target components with higher efficiency. [Means for solving the problem]

[0006] In order to solve the above problems, the flow path forming plate of the present disclosure is a flow path forming plate used to form a flow path of a gas adsorption unit, and comprises a porous plate having a plurality of holes extending in the plate thickness direction, and a gas adsorbent arranged so as to fill the inside of each of the holes, and the porous plate is formed of a material having a thermal conductivity higher than that of the gas adsorbent.

[0007] The gas adsorption unit according to the present disclosure comprises a plurality of flow path forming plates arranged at intervals in the plate thickness direction to form the flow path therebetween, and a casing that holds the plurality of flow path forming plates from the outside.

[0008] The gas adsorption apparatus according to the present disclosure includes a gas supply flow path through which a gas containing a component to be adsorbed flows, a gas adsorption unit provided on the gas supply flow path, and a temperature adjustment unit provided adjacent to the gas adsorption unit for adjusting the temperature of the adsorbent. Effect of the Invention

[0009] According to the present disclosure, it is possible to provide a flow path forming plate, a gas adsorption unit, and a gas adsorption device capable of adsorbing and desorbing target components with higher efficiency. [Brief description of the drawings]

[0010] [Figure 1] 1 is a cross-sectional view showing a configuration of a gas adsorption device according to an embodiment of the present disclosure. [Diagram 2] FIG. 2 is a front view showing the configuration of a gas adsorption unit according to an embodiment of the present disclosure. [Diagram 3] FIG. 2 is a plan view illustrating a configuration of a flow path forming plate according to an embodiment of the present disclosure. [Figure 4] 4 is a cross-sectional view showing a configuration of a flow path forming plate according to an embodiment of the present disclosure. FIG. [Diagram 5] 11 is a cross-sectional view showing a modified example of a flow path forming plate according to an embodiment of the present disclosure. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] (Configuration of Gas Adsorption Apparatus 1) Hereinafter, a gas adsorption device 1, a gas adsorption unit 10, and a flow path forming plate 11 according to a first embodiment of the present disclosure will be described with reference to FIGS. 1 to 4. FIG.

[0012] The gas adsorption apparatus 1 is provided, for example, on an exhaust line of a gas turbine combined cycle plant (GTCC) and is used to adsorb and remove carbon dioxide contained in the exhaust gas. As shown in Fig. 1, the gas adsorption apparatus 1 includes a gas supply passage 2, a gas adsorption unit 10, and a temperature adjustment section 3.

[0013] The gas supply flow path 2 is a pipe through which gas containing components to be adsorbed, such as the exhaust gas described above, flows. A gas adsorption unit 10 is provided on the gas supply flow path 2. The detailed configuration of the gas adsorption unit 10 will be described later. The gas adsorption unit 10 adsorbs and removes gas components to be adsorbed, such as carbon dioxide in the exhaust gas. Therefore, a gas having a lower carbon dioxide concentration flows downstream of the gas adsorption unit 10 in the gas supply flow path 2 than upstream. A temperature adjustment unit 3 is provided so as to be juxtaposed to the gas adsorption unit 10. The temperature adjustment unit 3 is, for example, an electric heater or a ceramic heater. The temperature adjustment unit 3 adjusts the temperature of the gas adsorbent 42 in the gas adsorption unit 10, thereby advancing each process of gas adsorption and desorption by the gas adsorbent 42. Note that when the gas flowing through the gas supply flow path 2 is at a high temperature, it is possible to adjust the temperature of the gas adsorbent 42 by the heat of the gas itself, without using the temperature adjustment unit 3.

[0014] (Configuration of gas adsorption unit 10) As shown in FIG. 2, the gas adsorption unit 10 has a plurality of flow passage forming plates 11 and a casing 13 that holds the flow passage forming plates 11 from the outside. The gas adsorption unit 10 also has a plurality of flow passages F extending in the gas flow direction D. The flow passages F are defined by the plurality of flow passage forming plates 11. The flow passage forming plates 11 are in the form of a plate extending in the gas flow direction D. The flow passage forming plates 11 are arranged at intervals in the plate thickness direction. Another flow passage forming plate 11 curved in a wave shape (referred to as a curved plate 12) is arranged between a pair of flow passage forming plates 11 adjacent to each other in the plate thickness direction. The curved plate 12 is curved so as to have unevenness on both sides in the plate thickness direction, and the top of the convex portion is abutted against and fixed to one of the adjacent flow passage forming plates 11. As viewed from the gas flow direction D, the angle formed by the curved plate 12 and the flow passage forming plate 11 is, for example, smaller than 90°. That is, the flow passage F has a triangular cross-sectional shape as viewed from the gas flow direction D. The angle between the curved plate 12 and the flow path forming plate 11 may be 90° or more.

[0015] (Configuration of flow path forming plate 11) As shown in FIG. 3, the flow passage forming plate 11 has a perforated plate 41 and a gas adsorbent 42. The perforated plate 41 is made of a material having a thermal conductivity higher than that of the gas adsorbent 42. The perforated plate 41 has a rigidity higher than that of the gas adsorbent 42. The perforated plate 41 is, for example, a metal lath, which is a plate formed integrally with a metal material and has a plurality of holes 50 extending in the plate thickness direction. These holes 50 are, for example, rhombic in plan view, and are arranged regularly or irregularly at intervals in the in-plane direction. The planar shape of the holes 50 may be a circle, a rectangle, or another polygon. The inside of each hole 50 is filled with the gas adsorbent 42. For example, when carbon dioxide is to be adsorbed, the gas adsorbent 42 is preferably an amine-based substance supported on a porous material, zeolite, a metal organic framework, or the like. As shown in FIG. 4, the gas adsorbent 42 is filled only in the holes 50, and when viewed in cross section, both sides of the porous plate 41 in the plate thickness direction are exposed to the outside (flow path F).

[0016] (Action and effect) In operating the gas adsorption device 1, first, gas is circulated through the gas supply flow path 2. If necessary, the temperature of the gas adsorbent 42 may be lowered. This starts the adsorption of the gas component to be adsorbed, such as carbon dioxide, by the gas adsorbent 42. When the adsorption ability of the gas adsorbent 42 decreases, the temperature of the gas adsorbent 42 is increased by the temperature control unit 3, carbon dioxide is desorbed from the gas adsorbent 42, and then the temperature of the gas adsorbent 42 is lowered. It is preferable that the gas flow path during desorption is configured to be switched by a damper or the like so as to be different from the gas flow path during adsorption. By repeating this cycle, gas adsorption and desorption are performed over a long period of time. It is also possible to reduce the pressure inside the device when desorbing carbon dioxide (adsorbed component). Furthermore, when cooling during adsorption, low-temperature gas may be circulated, or the temperature control unit 3 may exchange heat between a low-temperature substance and the gas adsorbent 42. In addition, the adsorption and desorption process may be switched by rotating or moving the gas adsorbent 42 itself. In order to lower the gas temperature during adsorption, a cooling mechanism or the like may be provided upstream of the device.

[0017] Here, various gas adsorption devices 1 have been proposed so far to selectively recover carbon dioxide and the like from gas. As one example, a device has been disclosed that includes a heat transfer tube through which a heat transfer medium flows and a granular adsorbent packed around the heat transfer tube. It has been said that carbon dioxide in the gas can be adsorbed by the adsorbent by flowing the gas through the device while adjusting the temperature of the adsorbent by the heat of the heat transfer medium.

[0018] However, in the conventional technology, there is a problem that heat is not efficiently transferred to the adsorbent in the area away from the heat transfer tube, making it difficult to adjust the temperature. As a result, the adsorption performance of the adsorbent cannot be fully utilized, and the efficiency of the gas adsorption device 1 decreases. Therefore, in this embodiment, the above-mentioned configurations are adopted.

[0019] According to the above configuration, the gas adsorbent 42 is provided so as to fill the holes 50 of the perforated plate 41. Specifically, the gas adsorbent 42 in the holes 50 and the perforated plate 41, which is a heat conductive material, are arranged in close proximity to each other. Therefore, when the gas adsorbent 42 is heated through the perforated plate 41, heat can be efficiently transferred to the gas adsorbent 42. This reduces the unevenness in the temperature of the gas adsorbent 42, and allows gas adsorption and desorption to proceed more quickly and stably. In addition, since the perforated plate 41 made of a metal material is used, the strength and rigidity of the gas adsorbent 42 can be complemented by the perforated plate 41. This allows the strength of the flow passage forming plate 11 to be further increased.

[0020] In addition, according to the above configuration, since metal lath, which is a porous metal body that is easily available, is used as the porous plate 41, the flow passage forming plate 11 can be produced more cheaply and easily, which makes it possible to reduce the maintenance cost and manufacturing cost of the entire device.

[0021] Furthermore, according to the above configuration, since the perforated plate 41 is exposed to the outside on both sides in the plate thickness direction, for example, when the heat of the gas flowing through the flow path F or the temperature of the gas adsorbent 42 is adjusted by the temperature adjustment unit 3, the heat is easily transferred to the perforated plate 41 by the gas touching the perforated plate 41. Or, the heat of the temperature adjustment unit 3 is easily transferred so as to spread throughout the entire perforated plate 41. Therefore, it is possible to stably adjust the temperature of the gas adsorbent 42 with higher responsiveness. In addition, by filling the holes 50 of the metal lath with the gas adsorbent 42, the gas adsorbent 42 can be held more firmly and stably in the holes 50. This makes it possible to continue using the flow path forming plate 11 stably for a long period of time.

[0022] In addition, according to the above configuration, the flow passage F is formed by arranging a plurality of flow passage forming plates 11 at intervals, and these flow passage forming plates 11 can be held by the casing 13. This allows each gas adsorption unit 10 to be easily transported and installed. In other words, by modularizing the gas adsorption unit 10, it can be easily detached and replaced when it reaches the end of its life. This makes it possible to efficiently carry out maintenance work and construction work in the plant in a short period of time.

[0023] Furthermore, according to the above configuration, since the other flow path forming plate 11 curved in a corrugated shape is interposed between the pair of flow path forming plates 11, the strength between the plate-like flow path forming plates 11 is ensured, and the cross-sectional shape of the flow path F can be maintained more stably. In addition, since the surface area of ​​the gas adsorbent 42 in the flow path F is also increased, it is possible to more efficiently advance gas adsorption. Furthermore, by bringing the other corrugated flow path forming plate 11 (curved plate 12) into contact with the flat flow path forming plate 11, heat is transferred three-dimensionally, and heating efficiency can also be improved.

[0024] Furthermore, according to the above configuration, since the flow path F is configured so that the gas flows along the surface direction of the porous plate 41, clogging of the flow path F due to foreign matter such as dust contained in the gas being captured by the gas adsorbent 42 is less likely to occur compared to the case where the gas flows from the direction opposite to the porous plate 41. This makes it possible to continue using the gas adsorption unit 10 stably for a longer period of time.

[0025] Therefore, according to the above configuration, it is possible to provide the gas adsorption device 1 capable of stably adsorbing gas for a longer period of time.

[0026] (Other embodiments) Although the embodiments of the present disclosure have been described in detail above with reference to the drawings, the specific configuration is not limited to this embodiment, and design changes and the like that do not depart from the gist of the present disclosure are also included.

[0027] For example, in the above embodiment, an example has been described in which both sides in the plate thickness direction of the porous plate 41 of the flow path forming plate 11 are exposed to the outside. However, as a modified example, it is also possible to provide more layers of gas adsorbent 42 so as to cover a part or the whole of both sides in the plate thickness direction, as shown in Fig. 5. With this configuration, the effective area of ​​the gas adsorbent 42 increases, so that more target components can be adsorbed by the gas adsorbent 42.

[0028] Furthermore, the temperature adjustment unit 3 may be an electric heater, a ceramic heater, or a configuration in which a current is directly supplied to the porous plate 41 to generate Joule heat due to internal resistance and heat the gas adsorbent 42. Even in this case, the same effects as those described above can be obtained.

[0029] The form of the porous plate 41 is not limited to a metal lath, and a mesh or wire netting may be suitably used as long as it is a thin-plate-like porous metal body having a large number of holes 50. With this configuration, the same effects as those described above can be obtained.

[0030] <Additional Notes> The flow path forming plate 11, the gas adsorption unit 10, and the gas adsorption device 1 described in each embodiment can be understood, for example, as follows.

[0031] (1) The flow path forming plate 11 in the first embodiment is a flow path forming plate 11 used to form a flow path F of a gas adsorption unit 10, and comprises a porous plate 41 having a plurality of holes 50 extending in the plate thickness direction, and a gas adsorbent 42 arranged so as to fill the inside of each of the holes 50, and the porous plate 41 is formed of a material having a thermal conductivity higher than that of the gas adsorbent 42.

[0032] According to the above configuration, the gas adsorbent 42 is provided so as to fill the holes 50 of the porous plate 41, and therefore, when the gas adsorbent 42 is heated through the porous plate 41, heat can be efficiently transferred to the gas adsorbent 42. This reduces unevenness in the temperature of the gas adsorbent 42, and allows gas adsorption and desorption to proceed more stably.

[0033] (2) The flow path forming plate 11 according to the second aspect is the flow path forming plate 11 of (1), in which the porous plate 41 has a higher rigidity than the gas adsorbent .

[0034] According to the above-mentioned configuration, the porous plate 41 can increase the rigidity of the entire flow passage forming plate 11.

[0035] (3) The flow passage forming plate 11 according to a third embodiment is the flow passage forming plate 11 of (1) or (2), in which the porous plate 41 is a metal lath.

[0036] According to the above-mentioned configuration, since a metal lath that is easily available is used as the porous plate 41, the flow passage forming plate 11 can be produced at a lower cost. This makes it possible to reduce the maintenance cost and manufacturing cost of the entire device.

[0037] (4) A flow passage forming plate 11 according to a fourth aspect is the flow passage forming plate 11 according to any one of the aspects (1) to (3), in which the porous plate 41 is exposed to the outside on both sides in the plate thickness direction.

[0038] According to the above configuration, since the perforated plate 41 is exposed to the outside on both sides in the plate thickness direction, for example, when the temperature of the gas adsorbent 42 is adjusted by the heat of the gas flowing through the flow path F, the heat is easily transferred to the perforated plate 41 when the gas comes into contact with the perforated plate 41. This makes it possible to stably adjust the temperature of the gas adsorbent 42 with higher responsiveness. In addition, by filling the holes 50 of the metal lath with the gas adsorbent 42, the gas adsorbent 42 can be held more firmly and stably within the holes 50. This makes it possible to continue using the flow path forming plate 11 stably for a long period of time.

[0039] (5) A flow path forming plate 11 in a fifth aspect is a flow path forming plate 11 in any one of the aspects (1) to (3), wherein the gas adsorbent 42 is further provided on both sides of the porous plate 41 in the plate thickness direction when viewed in a cross-sectional view along the plate thickness direction.

[0040] According to the above-mentioned configuration, the gas adsorbent 42 is further provided on both sides of the perforated plate 41 in the plate thickness direction so as to cover the perforated plate 41. This increases the effective area of ​​the gas adsorbent 42, making it possible for a larger amount of the target component to be adsorbed by the gas adsorbent 42.

[0041] (6) The gas adsorption unit 10 of the sixth aspect comprises a plurality of flow path forming plates 11 of any one of the aspects (1) to (5) arranged at intervals in the plate thickness direction to form the flow path F therebetween, and a casing 13 that holds the plurality of flow path forming plates 11 from the outside.

[0042] According to the above configuration, the flow passage F is formed by arranging a plurality of flow passage forming plates 11 at intervals, and these flow passage forming plates 11 can be held by the casing 13. This allows each gas adsorption unit 10 to be easily transported and installed. This makes it possible to efficiently carry out maintenance work and construction work in the plant in a short period of time.

[0043] (7) The gas adsorption unit 10 according to a seventh aspect is the gas adsorption unit 10 of (6), further comprising another flow path forming plate 11 that is provided between a pair of the flow path forming plates 11 adjacent to each other in the plate thickness direction, is curved so as to have projections and recesses in the plate thickness direction, and has an apex of the projection abutting against one of the pair of flow path forming plates 11.

[0044] According to the above configuration, since the other flow path forming plate 11 curved in a corrugated shape is interposed between the pair of flow path forming plates 11, the cross-sectional shape of the flow path F can be maintained more stably. In addition, since the surface area of ​​the gas adsorbent 42 in the flow path F is also increased, gas adsorption can be promoted more efficiently. Furthermore, by bringing the other corrugated flow path forming plate 11 into contact with the flat flow path forming plate 11, heat is transferred three-dimensionally, and the heating efficiency can be improved.

[0045] (8) The gas adsorption unit 10 according to an eighth aspect is the gas adsorption unit 10 according to (6) or (7), in which the gas flows in the flow path F along the surface direction of the porous plate 41.

[0046] According to the above configuration, since the flow path F is configured so that the gas flows along the surface direction of the porous plate 41, clogging of the flow path F due to foreign matter such as dust contained in the gas being captured by the gas adsorbent 42 is less likely to occur compared to, for example, a case in which the gas flows from a direction opposing the porous plate 41. This makes it possible to continue using the gas adsorption unit 10 stably for a longer period of time.

[0047] (9) A gas adsorption apparatus 1 according to a ninth aspect includes a gas supply flow path 2 through which a gas containing a component to be adsorbed flows, a gas adsorption unit 10 according to any one of the aspects (6) to (8) provided on the gas supply flow path 2, and a temperature control section 3 provided adjacent to the gas adsorption unit 10 for controlling the temperature of the gas adsorbent 42.

[0048] According to the above configuration, it is possible to provide the gas adsorption device 1 capable of stably adsorbing and desorbing gas for a longer period of time. [Explanation of symbols]

[0049] REFERENCE SIGNS LIST 1...gas adsorption device 2...gas supply flow path 3...temperature control section 10...gas adsorption unit 11...flow path forming plate 12...curved plate 13...casing 41...perforated plate 42...gas adsorbent 50...hole D...gas flow direction F...flow path

Claims

1. A flow path forming plate used for forming a flow path of a gas adsorption unit, an integrally formed porous plate having a plurality of holes extending in the plate thickness direction, a gas adsorbent disposed so as to fill the inside of each of the holes, comprising: The porous plate is a flow path forming plate formed of a material having a higher thermal conductivity than that of the gas adsorbent.

2. The flow path forming plate according to claim 1, wherein the porous plate has higher rigidity than the gas adsorbent.

3. The flow path forming plate according to claim 1 or 2, wherein the porous plate is a metal lath.

4. The flow path forming plate according to claim 1 or 2, wherein the porous plate is exposed to the outside on both sides in the plate thickness direction.

5. The flow path forming plate according to claim 1 or 2, wherein the gas adsorbent is further provided on both sides of the porous plate in the plate thickness direction in a cross-sectional view along the plate thickness direction.

6. A plurality of flow path forming plates according to claim 1, which are arranged at intervals in the plate thickness direction to form the flow path therebetween, a casing that holds the plurality of flow path forming plates from the outside, and a gas adsorption unit comprising:

7. The gas adsorption unit according to claim 6, further comprising another flow path forming plate provided between a pair of adjacent flow path forming plates in the plate thickness direction, curved so as to be uneven in the plate thickness direction, and the top of the convex portion is in contact with one of the pair of flow path forming plates.

8. The gas adsorption unit according to claim 6 or 7, wherein in the flow path, gas is configured to flow along the surface direction of the porous plate.

9. A gas supply passage through which a gas containing a component to be adsorbed flows, The gas adsorption unit according to claim 6 or 7 provided on the gas supply passage, A temperature adjustment unit that is provided together with the gas adsorption unit and adjusts the temperature of the gas adsorbent, A gas adsorption device comprising:

Images