Gas storage container

Abstract

To provide a gas storage container suitable for improving maintainability.SOLUTION: The gas storage vessel 100 of the present disclosure includes a tubular vessel body 10 capable of accommodating a gas adsorbent, a first opening 21 disposed in a side 10a at one end of the vessel body 10 and through which the gas adsorbent is put into the vessel body 10, a second opening 22 disposed in a side 10b at the other end of the vessel body 10 and through which the gas adsorbent is discharged from the vessel body 10, and at least one gas port. The at least one gas port includes, for example, a first gas port 31 and a second gas port 32 different from the first gas port 31.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a gas storage vessel. [Background technology]

[0002] In recent years, from the viewpoint of environmental regulations, etc., attention has been focused on a technology for recovering a specific gas, such as carbon dioxide, contained in a mixed gas by concentrating it using a separation membrane, etc. The concentrated gas containing a high concentration of the specific gas is, for example, pressurized and filled into a pressure vessel containing an adsorbent that adsorbs the specific gas, and transported to a desired location.

[0003] Conventionally, pressure vessels for gas storage are assembled by placing an adsorbent inside a cylindrical, bottomed container body and then welding a hemispherical member called a head plate to the opening of the container body. Therefore, it is not easy to remove the adsorbent from the pressure vessel. Therefore, pressure vessels with an adsorbent removal port have been proposed to facilitate maintenance. For example, Patent Document 1 describes an adsorption-type gas storage container equipped with a container member filled with an adsorbent capable of adsorbing and desorbing a specific gas, in which the container member is provided with a gas inlet / outlet through which the adsorbent can be introduced and removed. In the gas storage container of Patent Document 1, the gas inlet / outlet doubles as both a gas inlet and a gas outlet. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-151219 Summary of the Invention [Problem to be solved by the invention]

[0005] The gas storage container as described in Patent Document 1 needs to be reconsidered from the viewpoint of improving maintainability. Therefore, an object of the present invention is to provide a gas storage container suitable for improving maintainability. [Means for solving the problem]

[0006] According to one aspect, the present invention provides: a cylindrical container body capable of accommodating a gas adsorbent; a first opening disposed at one end of the container body for introducing the gas adsorbent into the container body; a second opening disposed at the other end opposite to the one end of the container body, for discharging the gas adsorbent from the container body; at least one gas port; a gas storage vessel comprising: to provide. [Effects of the Invention]

[0007] According to the present invention, a gas storage container suitable for improving maintainability can be provided. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a schematic cross-sectional view showing an example of a gas storage container according to an embodiment of the present invention. [Figure 2] FIG. 2 is a schematic side view of the gas storage vessel of FIG. 1. [Figure 3A] 2 is a schematic cross-sectional view showing the state of the gas storage container of FIG. 1 when a gas adsorbent is introduced into the container body. [Figure 3B] 2 is a schematic cross-sectional view showing the state of the gas storage container of FIG. 1 when the gas adsorbent is discharged from the container body. [Figure 4] 2 is a schematic cross-sectional view showing the state of the gas storage container of FIG. 1 during the adsorption mode. [Figure 5] 2 is a transparent plan view of the gas storage container of FIG. 1 from the upper end side. FIG. [Figure 6] 2 is a transparent plan view of the gas storage container of FIG. 1 seen from the bottom end side. FIG. [Figure 7] FIG. 2 is a partially enlarged view of FIG. [Figure 8] FIG. 10 is a schematic cross-sectional view showing an example of a gas storage container according to a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0009] A gas storage container according to a first aspect of the present invention comprises: a cylindrical container body capable of accommodating a gas adsorbent; a first opening disposed at one end of the container body for introducing the gas adsorbent into the container body; a second opening disposed at the other end opposite to the one end of the container body, for discharging the gas adsorbent from the container body; at least one gas port; Equipped with.

[0010] In a second aspect of the present invention, for example, in the gas storage container according to the first aspect, the at least one gas port includes a first gas port and a second gas port different from the first gas port.

[0011] In a third aspect of the present invention, for example, the gas storage container according to the second aspect further comprises a first lid portion that is detachable from the first opening of the container body, and a second lid portion that is detachable from the second opening of the container body, wherein the first gas port is disposed in the first lid portion, and the second gas port is disposed in the second lid portion.

[0012] In a fourth aspect of the present invention, for example, in a gas storage container according to the second or third aspect, when the gas storage container is viewed in a transparent plan view from the one end side, the portion occupied by the first gas port is located inside the portion occupied by the first opening.

[0013] In a fifth aspect of the present invention, for example, in a gas storage container according to any one of the second to fourth aspects, when the gas storage container is viewed in a transparent plan view from the other end side, the portion occupied by the second gas port is located more inward than the portion occupied by the second opening.

[0014] In a sixth aspect of the present invention, for example, in the gas storage container according to any one of the second to fifth aspects, the first gas port and the second gas port are located on the central axis of the container body.

[0015] In a seventh aspect of the present invention, for example, the gas storage container according to any one of the second to sixth aspects further includes a filter member provided in the second gas port.

[0016] In an eighth aspect of the present invention, for example, the gas storage container according to any one of the first to seventh aspects further comprises a temperature sensor capable of measuring the temperature of the gas adsorbent when the gas adsorbent is contained in the container body.

[0017] In a ninth aspect of the present invention, for example, in the gas storage container according to any one of the first to eighth aspects, when the container body is placed on an installation surface, the first opening is located above the second opening.

[0018] In a tenth aspect of the present invention, for example, the gas storage container according to the tenth aspect further includes legs that hold the container body in a state spaced apart from the installation surface.

[0019] The present invention will be described in detail below, but the following description is not intended to limit the present invention to a specific embodiment.

[0020] <Gas storage container> FIG. 1 is a schematic cross-sectional view showing an example of a gas storage container 100 according to one embodiment of the present invention. FIG. 2 is a schematic side view of the gas storage container 100 of FIG. 1. The gas storage container 100 includes a cylindrical container body 10 capable of accommodating a gas adsorbent, a first opening 21 disposed at one end of the container body 10, a second opening 22 disposed at the other end opposite the one end of the container body 10, and at least one gas port. The first opening 21 is an opening (adsorbent inlet) for introducing the gas adsorbent into the container body 10. The second opening 22 is an opening (adsorbent outlet) for discharging the gas adsorbent from the container body 10. In this specification, the term "cylindrical" refers to a three-dimensional shape having a through-hole at the center extending in one direction, and the cross-sectional shape is not particularly limited. The cross-sectional shape may be circular, elliptical, polygonal, or the like.

[0021] According to the gas storage container 100, the gas adsorbent contained in the container body 10 can be discharged through the second opening 22. Therefore, compared to conventional pressure containers, the gas adsorbent can be removed from the container body 10 much more easily. Furthermore, according to the gas storage container 100, the gas adsorbent can be introduced into the container body 10 through the first opening 21. This allows the container body 10 to be reused. Furthermore, in the gas storage container 100, the first opening 21 is located at one end of the container body 10 and the second opening 22 is located at the other end of the container body 10. Therefore, for example, when the gas storage container 100 is installed so that the first opening 21 is located above the second opening 22, the gas adsorbent can be easily discharged through the second opening 22 located below. Therefore, when removing the gas adsorbent from the container body 10, it is not necessary to turn the container body 10 upside down or tilt it. As such, the gas storage container 100 according to this embodiment has excellent maintainability.

[0022] As shown in Fig. 1, in the gas storage container 100, when the container body 10 is installed on an installation surface SI, the first opening 21 may be located above the second opening 22. With this configuration, the gas adsorbent can be easily discharged from the second opening 22 located below. In the example of Fig. 1, the installation surface SI is a horizontal plane. That is, in the example of Fig. 1, one end of the container body 10 corresponds to the upper end 10a of the container body 10, and the other end of the container body 10 corresponds to the lower end 10b of the container body 10.

[0023] The gas adsorbent adsorbs, for example, gas A contained in a mixed gas containing gas A and gas B different from gas A.

[0024] Hereinafter, a mode in which a mixed gas is introduced into the container body 10, the mixed gas is brought into contact with a gas adsorbent, and gas A contained in the mixed gas is adsorbed by the gas adsorbent will be referred to as an "adsorption mode." When the adsorption mode is performed, a non-adsorbed gas is generated in the container body 10 after gas A is separated by the gas adsorbent. A mode in which the non-adsorbed gas is discharged to the outside of the container body 10 will be referred to as an "exhaust mode." After the adsorption mode is performed, a mode in which the adsorbed gas containing gas A is desorbed from the gas adsorbent that has adsorbed gas A will be referred to as a "desorption mode."

[0025] As described above, the gas storage container 100 has at least one gas port. The at least one gas port includes a gas inlet for introducing a mixed gas into the container body 10 containing the gas adsorbent, and a gas outlet for discharging gas from the inside of the container body 10 containing the gas adsorbent to the outside. The gas discharged from the container body 10 is a non-adsorbed gas when the adsorption mode is performed, and is an adsorbed gas when the desorption mode is performed.

[0026] The gas storage container 100 may include only one gas port as the at least one gas port. When the gas storage container 100 includes only one gas port, the gas port may serve as both a gas inlet and a gas outlet.

[0027] The at least one gas port may include a first gas port 31 and a second gas port 32 different from the first gas port 31. That is, the gas storage container 100 may be provided with two gas ports as the at least one gas port.

[0028] The mixed gas contains a gas other than gas A (e.g., gas B). Therefore, if the gas storage container 100 has only one gas port, when the mixed gas is pressurized and filled through the gas port into the container body 10 containing the gas adsorbent, the increase in the partial pressure of gas A in the container body 10 is limited, and an increase in the amount of gas A adsorbed by the gas adsorbent can be suppressed. However, if the gas storage container 100 has the first gas port 31 and a second gas port 32 different from the first gas port 31, for example, when the adsorption mode is performed, the mixed gas can be introduced through the first gas port 31 and the non-adsorbed gas can be discharged through the second gas port 32. In other words, the mixed gas can be circulated through the gas adsorbent. As a result, the amount of gas A adsorbed by the gas adsorbent can be increased.

[0029] 1, the gas storage container 100 includes a first gas port 31 and a second gas port 32. In the gas storage container 100, the first gas port 31 is provided on the same side as the first opening 21. The second gas port 32 is provided on the same side as the second opening 22. As shown in FIG. 1, the first gas port 31 may be provided on the same side as the first opening 21, and the second gas port 32 may be provided on the same side as the second opening 22.

[0030] 1, when the container body 10 is placed on the installation surface SI, if the first opening 21 is located above the second opening 22, the first gas port 31 may be used as a gas inlet and the second gas port 32 may be used as a gas outlet. With this configuration, for example, when the adsorption mode is performed, the mixed gas Gm can be circulated in one direction, which makes it easier to make the flow of the mixed gas Gm uniform. As a result, the gas A can be more efficiently adsorbed by the gas adsorbent.

[0031] The gas storage container 100 may further include a first lid portion 41 that is detachable from the first opening 21 of the container body 10, and a second lid portion 42 that is detachable from the second opening 22 of the container body 10. In this case, the first gas port 31 may be disposed in the first lid portion 41, and the second gas port 32 may be disposed in the second lid portion 42. With this configuration, the maintainability of the gas storage container 100 can be further improved.

[0032] The effects of the gas storage container 100 having a first lid portion 41 and a second lid portion 42, with the first gas port 31 being located in the first lid portion 41 and the second gas port 32 being located in the second lid portion 42, will be further explained with reference to Figures 3A to 4.

[0033] 3A is a schematic cross-sectional view showing the state of the gas storage container 100 of FIG. 1 when the gas adsorbent AG is introduced into the container body 10. FIG. 3B is a schematic cross-sectional view showing the state of the gas storage container 100 of FIG. 1 when the gas adsorbent AG is discharged from the container body 10. As shown in FIG. 3A, when introducing the gas adsorbent AG into the container body 10, for example, by removing the first lid portion 41 from the container body 10, the gas adsorbent AG can be easily introduced through the first opening 21. At this time, the second lid portion 42 is attached to the container body 10. As shown in FIG. 3B, when discharging the gas adsorbent AG from the container body 10, for example, by removing the second lid portion 42 from the container body 10, the gas adsorbent AG can be easily discharged through the second opening 22. At this time, the first lid portion 41 may be attached to or detached from the container body 10. In this way, by providing a first lid portion 41 that is detachable from the first opening 21 of the container body 10 and a second lid portion 42 that is detachable from the second opening 22 of the container body 10, when performing maintenance on the gas storage container 100, the gas adsorbent AG can be easily inserted and removed by removing the first lid portion 41 and / or the second lid portion 42.

[0034] FIG. 4 is a schematic cross-sectional view showing the state of the gas storage container 100 of FIG. 1 during the adsorption mode. As shown in FIG. 4, during the adsorption mode, a gas pipe PG1 is connected to the first gas port 31, and a gas pipe PG2 is connected to the second gas port 32. At this time, the first cover 41 and the second cover 42 are attached to the container body 10, and a gas adsorbent AG is housed in the container body 10. A mixed gas Gm supplied from an external mixed gas supply source (not shown) via the gas pipe PG1 is introduced into the container body 10 through the first gas port 31 disposed in the first cover 41. Examples of the external mixed gas supply source include a gas separation device and a DAC (Direct Air Capture Technology) device. A non-adsorbed gas Gn generated as a result of adsorption of the gas A by the gas adsorbent AG is discharged from the container body 10 through the second gas port 32 disposed in the second cover 42 (discharge mode). The non-adsorbed gas Gn is released, for example, to the atmosphere via the gas pipe PG2. Although not shown, when the desorption mode is performed, the adsorbed gas, including gas A desorbed from the gas adsorbent AG that has adsorbed gas A, is discharged from the container body 10 through the second gas port 32 disposed in the second lid 42. The adsorbed gas is recovered, for example, in an external recovery unit (not shown) connected to a gas pipe PG2. Because the first gas port 31 is disposed in the first lid 41 and the second gas port 32 is disposed in the second lid 42, when the gas storage container 100 is in an operation mode, an operation mode such as the adsorption mode or the desorption mode can be performed simply by attaching the first lid 41 and the second lid 42. Therefore, compared to when the opening for introducing or discharging the gas adsorbent and the gas port are a common opening (see, for example, Patent Document 1), the transition from maintenance to an operation mode such as the adsorption mode can be performed more smoothly.

[0035] The configuration of the first lid part 41 is not particularly limited as long as it is detachable from the first opening 21 of the container body 10. The configuration of the second lid part 42 is not particularly limited as long as it is detachable from the second opening 22 of the container body 10. When filling the mixed gas under pressure into the container body 10 containing the gas adsorbent, it is preferable that the first lid part 41 and the second lid part 42 are firmly connected to the first opening 21 and the second opening 22, respectively. An example of such a fixing method is clamping.

[0036] 1, a flange 11a for connecting to the first lid part 41 is formed on the upper end 10a of the container body 10. A flange 41a for connecting to the upper end 10a of the container body 10 is formed on the first lid part 41. As shown in FIG. 1, the flange 11a on the upper end 10a of the container body 10 and the flange 41a of the first lid part 41 may be configured to be fastenable by a clamp (not shown).

[0037] 1, a flange 11b for connecting to the second lid portion 42 is formed at the lower end 10b of the container body 10. A flange 42b for connecting to the lower end 10b of the container body 10 is formed at the second lid portion 42. As shown in FIG. 1, the flange 11b at the lower end 10b of the container body 10 and the flange 42b of the second lid portion 42 may be configured to be fastenable by a clamp (not shown).

[0038] 1, the container body 10 has a central axis X. In this specification, the "central axis" refers to an imaginary line that serves as the center of rotation when the container body 10 is rotated. Hereinafter, the "central axis X" is used to mean an extension line of the central axis X when the first lid part 41 and the second lid part 42 are arranged on the container body 10.

[0039] 5 is a perspective plan view of the gas storage container 100 from the upper end 10a side along the central axis X. As shown in FIG. 5, in the perspective plan view from one end (upper end 10a) of the container body 10, the portion 31a occupied by the first gas port 31 may be located more inward than the portion 21a occupied by the first opening 21. With this configuration, it is easy to communicate the first gas port 31 and the first opening 21 in the direction of the central axis X. Therefore, for example, there is no need to form an opening for the first gas port 31 separately from the first opening 21 on the upper end 10a side of the container body 10, resulting in a simpler structure.

[0040] 5, it is preferable that the portion 21a occupied by the first opening 21 is larger than the portion 31a occupied by the first gas port 31. In other words, it is preferable that the opening area of ​​the first opening 21 is larger than the opening area of ​​the first gas port 31.

[0041] 6 is a perspective plan view of the gas storage container 100 from the lower end 10b side along the central axis X. As shown in FIG. 6, in the perspective plan view from the other end (lower end 10b) side of the container body 10, the portion 32a occupied by the second gas port 32 may be located more inward than the portion 22a occupied by the second opening 22. With this configuration, it is easy to communicate the second gas port 32 and the second opening 22 in the direction of the central axis X. Therefore, for example, there is no need to form an opening for the second gas port 32 separately from the second opening 22 on the lower end 10b side of the container body 10, resulting in a simpler structure.

[0042] 6, it is preferable that the portion 22a occupied by the second opening 22 is larger than the portion 32a occupied by the second gas port 32. In other words, it is preferable that the opening area of ​​the second opening 22 is larger than the opening area of ​​the second gas port 32.

[0043] Although not shown, the first gas port 31 and the second gas port 32 may overlap when viewed in a perspective plan view from one end (upper end 10a) or the other end (lower end 10b) of the container body 10 along the central axis X. In other words, as shown in FIG. 1, the first gas port 31 and the second gas port 32 may be located on the central axis X. With this configuration, for example, when the adsorption mode is performed, it is easy to efficiently circulate the mixed gas inside the container body 10. As a result, the gas A can be more efficiently adsorbed onto the gas adsorbent.

[0044] Next, the container body 10, the first lid part 41 and the second lid part 42 will be described in more detail.

[0045] [Container body] In the example of FIG. 1, the container body 10 is cylindrical with a central axis X. As shown in FIG. 1, the container body 10 may be cylindrical. If the container body 10 is cylindrical, for example, when the adsorption mode is performed, it is easy to efficiently circulate the mixed gas inside the container body 10. As a result, the gas A can be more efficiently adsorbed into the gas adsorbent. In this specification, the term "cylindrical" means that the cross-sectional shape perpendicular to the central axis X is circular or elliptical, and is not limited to a cross-sectional shape perpendicular to the central axis X being a geometrically perfect circle.

[0046] As described above, the gas storage container 100 may be installed so that the first opening 21 is located higher than the second opening 22. In this case, the inclination angle of the central axis X of the container body 10 with respect to the installation surface SI is defined as θ10. Here, θ10 refers to the smallest angle between the central axis X and the installation surface SI within the range of 0° to 90°.

[0047] θ10 is, for example, in the range of 75° to 90°. The lower limit of θ10 may be 80° or more, or may be 85° or more. θ10 is typically 90°. That is, the central axis X may extend perpendicular to the installation surface SI.

[0048] The central axis X may extend perpendicular to the installation surface SI, and in a vertical cross section of the gas storage container 100 passing through the central axis X, the first gas port 31 and the second gas port 32 may be located on the central axis X. With this configuration, for example, when the adsorption mode is performed, the mixed gas can be efficiently circulated inside the container body 10.

[0049] When the container body 10 is cylindrical, the ratio (d21 / d10) of the diameter d21 of the first opening 21 to the inner diameter d10 of the container body 10 is, for example, in the range of 0.5 or more and 1 or less. The lower limit of the ratio (d21 / d10) may be 0.6 or more, 0.7 or more, 0.8 or more, or even 0.9 or more. When the above numerical range is satisfied, the gas adsorbent can be easily introduced into the container body 10 through the first opening 21.

[0050] When the ratio (d21 / d10) is less than 1, i.e., when d10>d21 is satisfied, as shown in Fig. 1, the container body 10 can have a body 12 and a first neck 13a connected to the body 12. The first opening 21 is disposed in the first neck 13a.

[0051] When the container body 10 is cylindrical, the ratio (d22 / d10) of the diameter d22 of the second opening 22 to the inner diameter d10 of the container body 10 is, for example, in the range of 0.5 or more and 1 or less. The lower limit of the ratio (d22 / d10) may be 0.6 or more, 0.7 or more, 0.8 or more, or even 0.9 or more. When the above numerical range is satisfied, the gas adsorbent can be easily discharged from the container body 10 through the second opening 22.

[0052] When the ratio (d22 / d10) is less than 1, i.e., when d10>d22 is satisfied, as shown in Fig. 1, the container body 10 can have a body 12 and a second neck 13b connected to the body 12. The second opening 22 is disposed in the second neck 13b.

[0053] When the container body 10 is cylindrical, the ratio (D10 / L10) of the outer diameter D10 of the container body 10 to the length L10 of the container body 10 in the direction of the central axis X is, for example, in the range of 1 or less. The upper limit of the ratio (D10 / L10) may be 0.75 or less, 0.5 or less, 0.25 or less, or even 0.1 or less. The lower limit of the ratio (D10 / L10) is, for example, 0.05 or more.

[0054] The container body 10 may satisfy L10>D10. In other words, the container body 10 may be a long cylindrical member whose longitudinal direction is the direction of the central axis X. With this configuration, for example, when the adsorption mode is performed, the mixed gas can be circulated more efficiently inside the container body 10.

[0055] [Lid] First cover portion 41 may have a cylindrical protrusion 41p that protrudes toward edge 31e of first gas port 31. With this configuration, for example, a gas pipe connected to an external mixed gas supply source (not shown) can be easily connected to first gas port 31.

[0056] The second cover 42 may have a cylindrical projection 42p that projects toward the edge 32e of the second gas port 32. With this configuration, for example, a gas pipe connected to an external recovery unit (not shown) can be easily connected to the second gas port 32.

[0057] The ratio (d31 / d21) of the diameter d31 of the first gas port 31 to the diameter d21 of the first opening 21 is, for example, in a range of less than 1. The upper limit of the ratio (d31 / d21) may be 0.75 or less, 0.5 or less, 0.25 or less, or even 0.1 or less. The lower limit of the ratio (d31 / d21) is, for example, 0.05 or more.

[0058] The ratio (d32 / d22) of the diameter d32 of the second gas port 32 to the diameter d22 of the second opening 22 is, for example, less than 1. The upper limit of the ratio (d32 / d22) may be 0.75 or less, 0.5 or less, 0.25 or less, or even 0.1 or less. The lower limit of the ratio (d32 / d221) is, for example, 0.05 or more.

[0059] Fig. 7 is an enlarged view of portion VII in Fig. 1. As shown in Fig. 7, the gas storage container 100 may further include a filter member 51 provided in the second gas port 32. According to this configuration, for example, when the container body 10 is installed on the installation surface SI, if a gas adsorbent is stored in the container body 10 of the gas storage container 100 in which the first opening 21 is located above the second opening 22, the filter member 51 provided in the second gas port 32 located below can prevent the gas adsorbent from leaking out of the container body 10 to the outside.

[0060] 7, filter member 51 may be provided on surface 42r of second cover portion 42 facing second opening 22 so as to cover second gas port 32. With this configuration, filter member 51 is less likely to come off second gas port 32. However, filter member 51 may also be provided on surface 42s of second cover portion 42 opposite surface 42r so as to cover second gas port 32. As shown in FIG. 7, surface 42s may be the surface of protrusion 42p.

[0061] The configuration of the filter member 51 is not particularly limited as long as it can prevent the gas adsorbent from leaking out of the container body 10. As the filter member 51, for example, a mesh or net made of metal or resin, a porous body made of an inorganic material, a woven fabric, a nonwoven fabric, a sponge, or the like can be used.

[0062] Although not shown in the drawings, the gas storage container 100 may further include a filter member 51 provided in the first gas port 31. According to this configuration, for example, when the container body 10 is installed on the installation surface SI, if a mixed gas is introduced into the container body 10 of the gas storage container 100 in which the first opening 21 is located above the second opening 22, the filter member 51 provided in the first gas port 31 located above can prevent solid impurities such as dust and dirt contained in the mixed gas from flowing into the container body 10.

[0063] The gas storage container 100 may further include a sensor that detects the adsorption state of the gas A in the gas adsorbent when the gas adsorbent is housed in the container body 10. It may be determined that adsorption by the gas adsorbent has been completed based on the detection value of the sensor.

[0064] In this embodiment, the point in time when "adsorption by the gas adsorbent is completed" may be the point at which breakthrough of the gas adsorbent begins (breakthrough point) or the point at which the gas adsorbent reaches adsorption saturation (saturation point). If the point in time when "adsorption by the gas adsorbent is completed" is the saturation point, the adsorption amount of the gas adsorbent can be increased to the maximum.

[0065] The sensor is not particularly limited as long as it can detect the adsorption state of gas A in the gas adsorbent. For example, a temperature sensor, an NDIR (non-dispersive infrared) sensor, a TCD (thermal conductivity detection) sensor, a GC-MS (gas chromatograph mass spectrometer), etc. can be used as the sensor.

[0066] The sensor may be a temperature sensor 61 that detects the temperature of the gas adsorbent. That is, the gas storage container 100 may further include a temperature sensor 61 that can measure the temperature of the gas adsorbent when the gas adsorbent is housed in the container body 10. When the mixed gas is brought into contact with the gas adsorbent, the temperature of the gas adsorbent rises due to the heat of adsorption associated with the adsorption of gas A. Even if breakthrough of the gas adsorbent begins, adsorption continues, and after adsorption saturation is reached, the temperature of the gas adsorbent returns to the temperature of the external atmosphere (e.g., room temperature). If the sensor is the temperature sensor 61, for example, the point at which the temperature of the gas adsorbent returns to the temperature of the external atmosphere can be regarded as the saturation point, and therefore the point at which "adsorption by the gas adsorbent is completed" can be regarded as the saturation point. As a result, the adsorption amount of the gas adsorbent can be maximized.

[0067] The type of temperature sensor 61 is not particularly limited. The temperature sensor may be a contact-type temperature sensor or a non-contact-type temperature sensor. Examples of contact-type temperature sensors include a temperature sensor using a thermistor and a temperature sensor using a thermocouple. Examples of non-contact-type temperature sensors include an infrared temperature sensor. In the example of FIG. 1, the temperature sensor 61 is a temperature sensor using a thermocouple.

[0068] The sensor may be a TCD sensor. When the sensor is a TCD sensor, for example, the breakthrough point can be considered as "when adsorption by the gas adsorbent is completed."

[0069] The gas storage container 100 may include a plurality of temperature sensors 61. In this case, as shown in Fig. 1, the plurality of temperature sensors 61 are preferably provided at different positions in the direction of the central axis X within the container body 10. With this configuration, for example, when a gas adsorbent is accommodated in the container body 10 of the gas storage container 100 that is installed so that the first opening 21 is located above the second opening 22, it is possible to grasp the adsorption state of the gas A according to the position of the gas adsorbent.

[0070] As described above, when the container body 10 of the gas storage container 100 is installed on the installation surface SI, the first opening 21 may be located above the second opening. In this case, the gas storage container 100 may further include legs 71 that hold the container body 10 apart from the installation surface SI. With this configuration, for example, it is easy to perform the work of discharging the gas adsorbent from the second opening 22 and the work of connecting a gas pipe for discharging the non-adsorbed gas or the adsorbed gas from the second gas port 32. Therefore, the maintainability of the gas storage container 100 is further improved.

[0071] When the gas storage container 100 has legs 71, the vertical distance d1 between the installation surface SI and a straight line L1 that passes through the lowest point of the gas storage container 100 and is horizontal to the installation surface SI can be set appropriately depending on the size of the gas storage container 100, the size and shape of the gas pipe to be connected, etc. In the example of Figure 1, the lowest point of the gas storage container 100 corresponds to the surface of the protrusion 42p of the second lid part 42.

[0072] The configuration of the legs 71 is not particularly limited as long as the container body 10 can be held apart from the installation surface SI when the container body 10 is installed on the installation surface SI. As shown in FIG. 1 , the legs 71 may be a pair of legs 71 extending downward from the trunk 12 of the container body 10.

[0073] The container body 10 may be configured to be detachable and movable from the gas storage container 100 installed on the installation surface SI, for example. With this configuration, for example, the container body 10 that has completed the adsorption mode can be replaced with another container body 10 that has previously contained a gas adsorbent. This allows the container body 10 that has completed the adsorption mode to undergo the desorption mode, for example, outside the system. Therefore, there is no need to stop the supply of the mixed gas Gm to perform the desorption mode. Therefore, the gas A can be efficiently recovered.

[0074] The capacity of the container body 10 can be set appropriately as needed. The capacity of the container body 10 is, for example, 500 L or less. The upper limit of the capacity of the container body 10 may be 400 L or less, 300 L or less, or even 200 L or less. The lower limit of the capacity of the container body 10 is not particularly limited. The lower limit of the capacity of the container body 10 is, for example, 1 L or more.

[0075] The gas adsorbent is not particularly limited as long as it can adsorb gas A. The gas adsorbent may be composed of, for example, a porous material. Examples of porous materials include activated carbon, zeolite, molecular sieve, mesoporous silica, metal-organic frameworks (MOFs), covalent organic frameworks (COFs), metal-organic polyhedra (MOPs), covalent organic polymers (COPs), porous aromatic frameworks (PAFs), hydrogen-bonded organic frameworks (HOFs), and porous organic polymers (POPs). The porous material may contain one or a combination of two or more materials selected from the group consisting of the above materials. The gas adsorbent may be composed of a polymer having an amino group. Such a polymer is, for example, an amine polymer containing structural units derived from an epoxy monomer.

[0076] The mixed gas contains an acidic gas. The mixed gas may contain, for example, carbon dioxide, methane, hydrogen, nitrogen, oxygen, helium, argon, propane, or propylene. The mixed gas contains gas A and gas B that is different from gas A. Examples of gas A and gas B include nitrogen and carbon dioxide. For example, the mixed gas may contain carbon dioxide as gas A and nitrogen as gas B. The mixed gas may contain nitrogen as gas A and carbon dioxide as gas B.

[0077] As the mixed gas, for example, a concentrated gas obtained by using a gas separation device equipped with a separation membrane to increase the concentration of carbon dioxide contained in exhaust gas emitted from combustion equipment such as a factory or power plant, or a concentrated gas obtained by using a DAC (Direct Air Capture Technology) device to increase the concentration of carbon dioxide contained in the atmosphere can be used.

[0078] <How to operate a gas storage tank> Next, a method for operating the above-described gas storage container 100 will be described with reference to FIGS. 3A to 4. FIG.

[0079] The method of operating the gas storage container 100 includes, for example, a gas adsorbent introduction step, an adsorption step, a discharge step, a desorption step, and a gas adsorbent discharge step.

[0080] First, the gas adsorbent AG is charged into the container body 10 (gas adsorbent charging step). In the gas adsorbent charging step, for example, by removing the first lid part 41 from the container body 10, the gas adsorbent AG can be easily charged through the first opening 21 (see FIG. 3A). After the gas adsorbent AG is charged into the container body 10, the first lid part 41 is attached to the container body 10.

[0081] After the gas adsorbent introduction step is completed, the mixed gas Gm is introduced into the container body 10 through the first gas port 31 disposed in the first lid portion 41 (adsorption step). The adsorption step corresponds to the adsorption mode. In the adsorption step, the mixed gas Gm is supplied from an external mixed gas supply source (not shown) through the gas pipe PG1, and the mixed gas Gm is introduced into the container body 10 through the first gas port 31 connected to the gas pipe PG1 (see FIG. 4).

[0082] During the adsorption step, the pressure inside the container body 10 is, for example, in the range of more than 0.1 MPa and not more than 3.0 MPa. The upper limit of the pressure inside the container body 10 may be not more than 2.5 MPa, not more than 2.0 MPa, not more than 1.5 MPa, or even not more than 1.0 MPa. In this specification, unless otherwise specified, "pressure" refers to absolute pressure.

[0083] The pressure inside the vessel body 10 during the adsorption step can be adjusted, for example, by a booster (not shown) provided in the gas pipe PG1.

[0084] During the adsorption process, non-adsorbed gas Gn is generated in the container body 10 as the gas A is adsorbed by the gas adsorbent AG. The non-adsorbed gas Gn is discharged from the container body 10 through the second gas port 32 disposed in the second lid portion 42 (discharge process). That is, the adsorption process and the discharge process can be performed in parallel. The discharge process corresponds to the discharge mode. In the discharge process, the non-adsorbed gas Gn is released, for example, to the atmosphere through the gas pipe PG2 connected to the second gas port 32 (see FIG. 4).

[0085] During the adsorption process, for example, when it is determined based on the detected value of the temperature sensor 61 that the adsorption of the gas A by the gas adsorbent AG is complete, the adsorption process and the discharge process are terminated.

[0086] After the adsorption process and the discharge process are completed, the adsorbed gas containing gas A is discharged from the container body 10 (desorption process). The desorption process corresponds to the desorption mode. In the desorption process, the adsorbed gas passes through the gas pipe PG2 connected to the second gas port 32 and is collected, for example, in an external collection unit (not shown) connected to the gas pipe PG2.

[0087] When the desorption step is performed, the pressure inside the container body 10 may be reduced. In other words, in the desorption step, the adsorbed gas may be desorbed from the gas adsorbent AG by reducing the pressure inside the container body 10. When the desorption step is performed, the pressure inside the container body 10 is reduced to, for example, 0.1 MPa. However, the pressure inside the container body 10 may also be reduced to a region below atmospheric pressure (0.1 MPa or less).

[0088] The pressure inside the vessel body 10 during the desorption step can be adjusted by, for example, a vacuum pump (not shown) provided in the gas pipe PG2.

[0089] After the desorption step is completed, the gas adsorbent AG may be discharged from the container body 10 (gas adsorbent discharging step). In the gas adsorbent discharging step, for example, the second lid part 42 is removed from the container body 10, so that the gas adsorbent AG can be easily discharged from the second opening 22 (see FIG. 3B). After the gas adsorbent AG is discharged from the container body 10, the second lid part 42 is attached to the container body 10.

[0090] After the gas adsorbent discharging step is completed, the gas adsorbent introducing step, the adsorption step, the discharging step, and the desorption step can be carried out again.

[0091] However, the gas adsorbent discharging step does not necessarily have to be performed immediately after the desorption step. The gas adsorbent discharging step may be performed when it is determined that the adsorption performance of the gas adsorbent AG has deteriorated.

[0092] <Modification of gas storage container> The gas storage container according to this embodiment is not limited to the configuration of the gas storage container 100 shown in Fig. 1. Modifications of the gas storage container according to this embodiment will be described below. In the following, elements common to the gas storage container 100 shown in Fig. 1 will be designated by the same reference numerals, and descriptions thereof may be omitted.

[0093] 8 is a schematic cross-sectional view showing an example of a gas storage container 200 according to a modified example. In the gas storage container 200, the first gas port 31 is not arranged in the first lid portion 41, and the second gas port 32 is not arranged in the second lid portion 42. That is, in the gas storage container 200, the first gas port 31 is provided separately from the first opening 21 on the upper end 10a side of the container body 10, and the second gas port 32 is provided separately from the second opening 22 on the lower end 10b side of the container body 10. The gas storage container 200 also allows the gas adsorbent contained in the container body 10 to be discharged from the second opening 22, so there is no need to turn the container body 10 upside down or tilt it when removing the gas adsorbent from the container body 10.

[0094] 8, the gas storage container 200 may include a plurality of first gas ports 31 and a plurality of second gas ports 32. In the gas storage container 200, the plurality of first gas ports 31 are provided on the same side as the first opening 21. The second gas port 32 is provided on the same side as the second opening 22.

[0095] In the example of FIG. 8, the lowest point of the gas storage container 200 corresponds to the surface of the second lid portion 42.

[0096] Next, a method of operating the above-described gas storage container 200 will be described.

[0097] Similar to the method for operating the gas storage vessel 100, the method for operating the gas storage vessel 200 may include a gas adsorbent charging step, an adsorption step, a discharge step, a desorption step, and a gas adsorbent discharge step.

[0098] First, the gas adsorbent AG is charged into the container body 10 (gas adsorbent charging step). In the gas adsorbent charging step, for example, by removing the first lid part 41 from the container body 10, the gas adsorbent can be easily charged through the first opening 21. After the gas adsorbent is charged into the container body 10, the first lid part 41 is attached to the container body 10.

[0099] After the gas adsorbent introduction step is completed, the mixed gas is introduced into the container body 10 through the first gas port 31 arranged on the upper end 10a side of the container body 10 (adsorption step). In the adsorption step, the mixed gas is supplied from an external mixed gas supply source (not shown) through a gas pipe (not shown), and the mixed gas is introduced into the container body 10 through the first gas port 31 connected to the gas pipe.

[0100] During the adsorption process, non-adsorbed gas is generated in the container body 10 as the gas A is adsorbed by the gas adsorbent. The non-adsorbed gas is discharged from the container body 10 through the second gas port 32 disposed on the lower end 10b side of the container body 10 (discharge process). That is, the adsorption process and the discharge process can be performed in parallel. During the discharge process, the non-adsorbed gas passes through a gas pipe (not shown) connected to the second gas port 32 and is released, for example, to the atmosphere.

[0101] During the adsorption process, for example, when it is determined based on the detected value of the temperature sensor 61 that the adsorption of the gas A by the gas adsorbent is complete, the adsorption process and the discharge process are terminated.

[0102] After the adsorption step and the discharge step are completed, the adsorbed gas containing gas A is discharged from the container body 10 (desorption step). In the desorption step, the adsorbed gas passes through a gas pipe connected to the second gas port 32 and is recovered, for example, in an external recovery unit (not shown) connected to the gas pipe PG2.

[0103] After the desorption step is completed, the gas adsorbent may be discharged from the container body 10 (gas adsorbent discharging step). In the gas adsorbent discharging step, for example, the second lid part 42 is removed from the container body 10, thereby making it possible to easily discharge the gas adsorbent from the second opening 22. After the gas adsorbent is discharged from the container body 10, the second lid part 42 is attached to the container body 10.

[0104] After the gas adsorbent discharging step is completed, the gas adsorbent introducing step, the adsorption step, the discharging step, and the desorption step can be carried out again.

[0105] However, the gas adsorbent discharging step does not necessarily have to be performed immediately after the desorption step, and may be performed when it is determined that the adsorption performance of the gas adsorbent has deteriorated.

[0106] (Other variations) The above examples may be combined with each other unless technically inconsistent. [Industrial Applicability]

[0107] The gas storage container of this embodiment is suitable for recovering a specific gas such as carbon dioxide from a mixed gas containing the specific gas. [Explanation of symbols]

[0108] 10 Container body 10a top end 10b Bottom end 11a flange 11b flange 12 Torso 13a 1st neck 13b 2nd neck 21 First Opening 22 Second opening 31 No. 1 Gas Port 31e Edge 32 Second Gas Port 32e Edge 41 1st lid part 41a flange 41p protrusion 42 2nd lid part 42b flange 42p protrusion 42r, 42s surface 51 Filter member 61 Temperature Sensor 71 Legs 100,200 Gas storage containers X center axis θ10 tilt angle SI installation surface AG gas adsorbent Gm mixed gas Gn non-adsorbed gas PG1, PG2 gas pipes

Claims

1. a cylindrical container body capable of accommodating a gas adsorbent; a first opening disposed at one end of the container body for introducing the gas adsorbent into the container body; a second opening disposed at the other end opposite to the one end of the container body, for discharging the gas adsorbent from the container body; at least one gas port; A gas storage container comprising:

2. The gas storage vessel of claim 1 , wherein the at least one gas port includes a first gas port and a second gas port different from the first gas port.

3. a first lid portion detachable from the first opening of the container body; a second lid portion detachable from the second opening of the container body; Furthermore, the first gas port is disposed in the first lid portion; The gas storage container of claim 2 , wherein the second gas port is located in the second lid.

4. When the gas storage container is viewed in a transparent plan view from the one end side, 3. The gas storage container according to claim 2, wherein a portion occupied by the first gas port is located inside a portion occupied by the first opening.

5. When the gas storage container is viewed from the other end side in a transparent plan view, 5. The gas storage container according to claim 4, wherein the portion occupied by the second gas port is located inside the portion occupied by the second opening.

6. 3. The gas storage container according to claim 2, wherein the first gas port and the second gas port are located on a central axis of the container body.

7. 3. The gas storage container of claim 2, further comprising a filter member provided in the second gas port.

8. 2. The gas storage container according to claim 1, further comprising a temperature sensor capable of measuring the temperature of the gas adsorbent when the gas adsorbent is housed in the container body.

9. The gas storage container according to claim 1 , wherein the first opening is located higher than the second opening when the container body is placed on an installation surface.

10. The gas storage container according to claim 9 , further comprising legs that hold the container body apart from the installation surface.

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