Adsorption tower for gas separation and gas generation device

Abstract

To provide an adsorption tower for gas separation that can produce refined gas with high purity even when the adsorption tower for gas separation employed in a gas generation device is oriented in any direction, and to provide the gas generation device using the adsorption tower for gas separation.SOLUTION: An adsorption tower 1 for gas separation comprises an adsorbent 10 accommodated inside, a gas introduction part G1 provided on one end side for introducing gas, and a gas extraction part G2 provided on the other end side for extracting gas that has passed through the adsorbent 10. The adsorption tower 1 for gas separation includes a cylindrical body 20 in which the adsorbent 10 is accommodated and which has a first opening 21 on one end side and a second opening 22 on the other end side, a first outer cover 210 which is provided so as to close the first opening 21 of the cylindrical body 20 and includes the gas introduction part G1, a second outer cover 220 which is provided so as to close the second opening 22 of the cylindrical body 20 and includes the gas extraction part G2, and a pressing device which applies the pressing force to the adsorbent 10 in either the first outer cover 210 or the second outer cover 220.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an adsorption column for gas separation and a gas generator. [Background technology]

[0002] For example, if air is present in the cylinder of an injection molding machine, it can cause burns (black combustion) on the product. Therefore, a method is used in which high-purity nitrogen is introduced into the cylinder to reduce the oxygen concentration in the cylinder. This method can be expected to prevent product burns, improve the quality of the final molded product, and extend the maintenance cycle of the injection molding machine.

[0003] To supply nitrogen to the cylinder portion of an injection molding machine, for example, a PSA (Pressure Swing Adsorption) type nitrogen gas generator is used. This nitrogen gas generator uses a gas separation adsorption tower to obtain high-purity nitrogen gas from a raw material gas (e.g., air). Such gas separation adsorption towers are disclosed in JP 2004-141723 A (Patent Document 1), JP 6-315606 A (Patent Document 1), etc. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2004-141723 [Patent Document 2] Japanese Patent Application Publication No. 6-315606 Summary of the Invention [Problem to be solved by the invention]

[0005] The size of the gas separation adsorption tower employed in the nitrogen gas generator used to supply nitrogen to the cylinder part of the above-mentioned injection molding machine can be categorized into two sizes, for example, 10 L / min and 20 L / min, based on the required nitrogen flow rate to the cylinder part.

[0006] In the case of the 10 L / min size, the gas separation adsorption tower is not large, so it can be used with a vertical layout, similar to a general PSA type nitrogen gas generator.

[0007] On the other hand, in the case of a 20 L / min size, due to height limitations on the installation space for the gas separation adsorption tower, the size of the gas separation adsorption tower cannot be increased proportionally, and the gas separation adsorption tower 1 must be laid out horizontally.

[0008] However, gas separation adsorption towers are typically installed vertically. This is due to the properties of the adsorbent. When a gas separation adsorption tower is first put into use, the adsorbent is accommodated within the gas separation adsorption tower to fill a specified volume. However, as the gas separation adsorption tower continues to be used, the volume of the adsorbent gradually decreases due to factors such as pressure changes from reduced pressure to atmospheric pressure and wear and breakage of the adsorbent due to gas flow. As a result, a space is generated at the top of the gas separation adsorption tower. When a gas separation adsorption tower is installed vertically, the raw gas is passed through the adsorbent from bottom to top, so the generation of the space is not considered a problem because the raw gas always passes through the adsorbent layer.

[0009] However, when a gas separation adsorption tower is placed horizontally, if the feed gas is passed through the adsorbent by flowing it horizontally, some of the feed gas passes through the space above the adsorbent, resulting in some feed gas not passing through the adsorbent, which reduces the nitrogen purity of the purified gas.

[0010] To avoid this problem, it was necessary to attach a nitrogen gas generator to the injection molding machine or to choose other costly purification methods.

[0011] This problem is not limited to gas generators for injection molding machines, but is a common problem in any device that requires a specific purified gas with high purity, and when the gas generator is required to be made smaller as the device becomes smaller.

[0012] The present invention has been made to solve the above-mentioned problems, and aims to provide a gas separation adsorption tower that can produce highly purified gas regardless of the orientation of the gas separation adsorption tower used in a gas generator, and a gas generator that uses the gas separation adsorption tower. [Means for solving the problem]

[0013] [1] An adsorption tower for gas separation according to the present disclosure is an adsorption tower for gas separation, which has an adsorbent accommodated therein and a gas inlet section at one end through which gas is introduced, and a gas extraction section at the other end through which the gas that has passed through the adsorbent is extracted, and which comprises: a cylindrical body which accommodates the adsorbent therein and which has a first opening at one end and a second opening at the other end; a first outer lid which is arranged to close the first opening of the cylindrical body and includes the gas inlet section; a second outer lid which is arranged to close the second opening of the cylindrical body and includes the gas extraction section; and one of the first outer lid and the second outer lid is provided with a pressing device which applies a pressing force to the adsorbent.

[0014] [2]: The adsorption tower for gas separation according to [1], wherein the pressing device is provided on the first outer cover including the gas inlet portion.

[0015] [3]: The adsorption tower for gas separation described in [2], wherein the first outer cover has a first side plate fixed to the first opening and having a hole through which the gas passes, a first pressing member arranged on the adsorbent side and having a hole through which the gas passes, and a biasing member arranged between the first side plate and the first pressing member and pressing the first pressing member against the adsorbent side.

[0016] [4]: The adsorption tower for gas separation according to [3], wherein the biasing member is at least one coil spring.

[0017] [5]: An adsorption tower for gas separation according to any one of [3] to [4], further comprising a first filter between the adsorbent and the first pressing member, which prevents the adsorbent from passing through and allows the gas to pass through, and the first filter is fixed to the first pressing member.

[0018] [6]: An adsorption tower for gas separation described in any one of [3] to [5], wherein the first pressing member includes a cylindrical first wall located inside the inner surface of the cylindrical body, and a guide part is fitted between the inner surface and the outer surface of the first wall.

[0019] [7]: A gas generating device comprising an adsorption tower for gas separation according to any one of [1] to [6], comprising: a gas delivery circuit for delivering the gas to the gas inlet of the adsorption tower for gas separation; and a gas extraction circuit for extracting the gas from the gas extraction section of the adsorption tower for gas separation.

[0020] [8]: The gas generator according to [7], wherein the cylindrical shell is arranged horizontally, and the gas flows horizontally from the gas inlet portion toward the gas outlet portion. [Effects of the Invention]

[0021] This disclosure makes it possible to provide a gas separation adsorption tower that can produce highly purified gas regardless of the orientation of the gas separation adsorption tower used in the gas generator, and a gas generator that uses this gas separation adsorption tower. [Brief explanation of the drawings]

[0022] [Figure 1] 1 is a partial cross-sectional view showing the configuration of an adsorption tower for gas separation according to a first embodiment. [Figure 2] 2 is an exploded view showing the configuration of a first outer cover of the gas separation adsorption tower according to the first embodiment. FIG. [Figure 3] 3 is a plan view showing the configuration of a first side plate according to the first embodiment. FIG. [Figure 4] 3 is a plan view showing the configuration of a first pressing member according to the first embodiment. FIG. [Figure 5] 3 is a plan view illustrating a configuration of a first filter according to the first embodiment. FIG. [Figure 6] 2 is an exploded view showing the configuration of a second outer cover of the gas separation adsorption tower according to the first embodiment. FIG. [Figure 7] 4 is a plan view showing the configuration of a second side plate according to the first embodiment. FIG. [Figure 8] 4 is a plan view showing the configuration of a second pressing member according to the first embodiment. FIG. [Figure 9] FIG. 3 is a plan view illustrating a configuration of a second filter according to the first embodiment. [Figure 10] FIG. 2 is an enlarged view of the area surrounded by X in FIG. [Figure 11] FIG. 10 is a diagram showing the configuration of a gas generating device according to a second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0023] An adsorption tower 1 for gas separation and a gas generator 1000 according to an embodiment of the present disclosure will be described below with reference to the drawings. In the embodiments described below, when reference is made to the number, amount, etc., the scope of the present invention is not necessarily limited to the number, amount, etc., unless otherwise specified. The same reference numerals are used for the same or corresponding parts, and redundant descriptions may not be repeated. It is intended from the beginning that the configurations in the embodiments may be used in appropriate combinations.

[0024] In this disclosure, the terms "comprise," "include," and "have" are open-ended, meaning that when a certain feature is included, other features may or may not be included.

[0025] [Embodiment 1] <Gas separation adsorption tower 1> The configuration of the gas separation adsorption tower 1 of this embodiment will be described with reference to Figures 1 to 10. Figure 1 is a partial cross-sectional view showing the configuration of the gas separation adsorption tower 1, Figure 2 is an exploded view showing the configuration of the first outer lid 210 of the gas separation adsorption tower 1, Figure 3 is a plan view showing the configuration of the first side plate 211, Figure 4 is a plan view showing the configuration of the first pressing member 212, Figure 5 is a plan view showing the configuration of the first filter 214, Figure 6 is an exploded view showing the configuration of the second outer lid 220 of the gas separation adsorption tower 1, Figure 7 is a plan view showing the configuration of the second side plate 221, Figure 8 is a plan view showing the configuration of the second pressing member 222, Figure 9 is a plan view showing the configuration of the second filter 224, and Figure 10 is an enlarged view of the area surrounded by X in Figure 1.

[0026] Referring to FIG. 1, the gas separation adsorption tower 1 of this embodiment is an adsorption tower 1 for gas separation that contains an adsorbent 10 inside and has a gas inlet section G1 at one end where gas (raw material gas) is introduced, and a gas extraction section G2 at the other end where gas (purified gas) that has passed through the adsorbent 10 is extracted.

[0027] The gas separation adsorption tower 1 includes a cylindrical shell 20, a first outer lid 210, a second outer lid 220, and a pressing device 300 provided on the side of the first outer lid 210.

[0028] In this embodiment, the cylindrical barrel 20 is a cylindrical steel barrel that extends along the central axis CL and includes a first opening 21 at one end and a second opening 22 at the other end. The shape does not necessarily have to be limited to a cylindrical shape, and may be a cylindrical shape with a rectangular or polygonal cross section, an L-shaped cylinder as a whole, or the like.

[0029] The cylindrical body 20 contains an adsorbent 10. In this embodiment, a highly pure purified gas is obtained by passing a raw material gas through the adsorbent 10. When air is used as the raw material gas and nitrogen is obtained as the purified gas, the adsorbent 10 may be, for example, carbon molecular sieves (CMS, Bellfine (registered trademark) MG) made from the phenolic resin "Bellpearl (registered trademark)" manufactured by Air Water Performance Chemicals Inc.

[0030] This Bellfine (registered trademark) MG is made from spherical phenolic resin and other raw materials, and has excellent homogeneity, a large oxygen adsorption capacity, excellent oxygen / nitrogen separation function, high strength and abrasion resistance, and excellent durability.

[0031] A first outer lid 210 is provided on the side of the first opening 21 of the cylindrical barrel 20 so as to close the first opening 21. A gas inlet G1 is provided in the first outer lid 210. An externally provided gas delivery circuit is connected to the gas inlet G1, and the source gas is introduced into the cylindrical barrel 20. The detailed internal structure of the first outer lid 210 will be described later.

[0032] A second outer lid 220 is provided on the side of the second opening 22 of the cylindrical barrel 20 so as to close the second opening 22. A gas extraction unit G2 is provided in the second outer lid 220. An externally provided gas extraction circuit is connected to the gas extraction unit G2, and purified gas is extracted from the cylindrical barrel 20. The detailed internal structure of the second outer lid 220 will be described later.

[0033] In this embodiment, the first outer lid 210 is provided with a pressing device 300 that constantly applies a pressing force to the adsorbent 10 contained in the cylindrical barrel 20. As described in this embodiment, the pressing device 300 may be provided in the first outer lid 210 into which the raw material gas is introduced, or in the second outer lid 220 from which the purified gas is extracted.

[0034] (First outer cover 210 / pressing device 300) Next, the configuration of the first outer cover 210 and the pressing device 300 will be described with reference to FIGS.

[0035] 2, the first outer lid 210 is assembled in this order from the first opening 21 side toward the inside along the central axis CL of the cylindrical barrel 20. The structure after assembly will be described later with reference to FIG.

[0036] 2 and 3, the first side plate 211 is made of a rectangular steel plate and has a first gas inlet 211h in its center. Through-holes 211b are provided near the four corners of the first side plate 211. An annular first O-ring groove 211m for fitting a first O-ring 215 is provided on the inner surface of the cylindrical barrel 20 of the first side plate 211. The first O-ring groove 211m is defined by the first side plate 211 and the first bottom plate 211s. When the first side plate 211 is fixed to the side of the first opening 21 of the cylindrical barrel 20, the first O-ring 215 fitted in the first O-ring groove 211m ensures airtightness of the interior of the cylindrical barrel 20.

[0037] A biasing member 213 is disposed between the first side plate 211 and the first pressing member 212. In this embodiment, a coil spring is used as an example of the biasing member 213, and is housed in the cylindrical barrel 20 in a compressed state around the central axis CL. The coil spring may be a single coil spring, or a combination of multiple coil springs.

[0038] In this embodiment, the pressing device 300 is described as using a coil spring as the biasing member 213 for generating a force to press the adsorbent 10, but the configuration is not limited to this. A known biasing member such as a leaf spring may be used instead of the coil spring. Alternatively, a mechanism (e.g., a check mechanism) may be employed in which the first pressing member 212 is pressed against the adsorbent 10 by the blowing pressure of the raw material gas introduced from the gas inlet G1, and the first pressing member 212 does not return to the first outer lid 210 side.

[0039] (First pressing member 212) 2 and 4, the first pressing member 212 includes a first plate 212a and a cylindrical first wall 212b that stands around the first plate 212a toward the biasing member 213. The first plate 212a is provided with a plurality of first through-holes 212h for allowing the source gas introduced into the cylindrical shell 20 to pass through.

[0040] 2 and 5, the first filter 214 is made of a relatively flexible material that allows the raw material gas to pass through but prevents the adsorbent 10 from passing through. In this embodiment, felt is used as an example of the first filter 214. In addition to felt (nonwoven fabric), other materials that can be used for the first filter 214 include wire mesh, sponge (open-cell), porous rubber, and porous resin. The outer dimensions of the first filter 214 are set larger than the outer dimensions of the first plate 212a of the first pressing member 212. The first filter 214 is fixed to the first plate 212a using first bolts 216 and first nuts 217 via first through holes 212h.

[0041] In the above-described configuration, at least the first bottom plate 211s, the biasing member 213, and the first plate 212a function as the pressing device 300.

[0042] (Second outer lid 220) Next, the configuration of the second outer lid 220 will be described with reference to Figures 6 to 9. With reference to Figure 6, the second outer lid 220 has a second side plate 221, a second O-ring 225, a second pressing member 222, and a second filter 224 assembled in this order along the direction of the central axis CL of the cylindrical barrel 20, from the side of the second opening 22 toward the inside.

[0043] 6 and 7, the second side plate 221 is made of a rectangular steel plate and has two gas extraction ports 221h provided in the center. Second bolt holes 221b are provided near the four corners of the second side plate 221. A second O-ring groove 221m having an annular shape is provided on the inner surface of the cylindrical barrel 20 of the second side plate 221 for fitting a second O-ring 225. The second O-ring groove 221m is defined by the second side plate 221 and the second bottom plate 221s. When the second side plate 221 is fixed to the side of the second opening 22 of the cylindrical barrel 20, the second O-ring 225 fitted in the second O-ring groove 221m ensures airtightness inside the cylindrical barrel 20.

[0044] 6 and 8, the second pressing member 222 includes a second plate 222a and a cylindrical second wall 222b that stands around the second plate 222a toward the second filter 224. The second plate 222a is provided with a plurality of second through holes 222h for allowing the purified gas that has passed through the inside of the cylindrical shell 20 to pass therethrough.

[0045] 6 and 9, the second filter 224 is made of a relatively flexible material that allows the source gas to pass through but prevents the adsorbent 10 from passing through. In this embodiment, the second filter 224 is made of felt similar to that used for the first filter 214. The outer dimensions of the second filter 224 are set to be larger than the outer dimensions of the second plate 222a of the second pressing member 222.

[0046] (Assembly of the first outer lid 210 to the cylindrical body 20) Next, the assembly of the first outer cover 210 to the cylindrical barrel 20 will be described with reference to Figure 10. The first filter 214 is fixed to the first plate 212a of the first pressing member 212 using the first through-holes 212h and the first bolts 216 and first nuts 217. In this embodiment, the first filter 214 is fixed at four locations, but the locations can be selected as appropriate.

[0047] The peripheral edge 214p of the first filter 214 is folded outward from the cylindrical first wall 212b and is positioned between the inner circumferential surface 20p of the cylindrical barrel 20 and the outer surface 212g of the first wall 212b. Furthermore, a guide component 218 made of resin (such as foamed polypropylene) is adhesively fixed to the entire periphery of the gap between the inner circumferential surface 20p and the outer surface 212g on the side of the first bottom plate 211s. The guide component 218 may be a single component that is continuous around the entire periphery of the gap, or may be divided into multiple components. The width W1 of the guide component 218 along the central axis CL is preferably long. This is because the force acting along the inner circumferential surface 20p of the cylindrical barrel 20 is stronger, thereby more effectively suppressing tilting of the first pressing member 212. On the other hand, the width W2 of the first wall 212b along the central axis CL is preferably short from the viewpoint of accommodating more adsorbent 10 inside the cylindrical barrel 20.

[0048] By providing this guide part 218, the inclination of the first pressing member 212 relative to the central axis CL of the cylindrical barrel 20 is suppressed, the position of the first pressing member 212 is stabilized, and the first pressing member 212 can be slid along the central axis CL of the cylindrical barrel 20 while the contact pressure of the peripheral portion 214p of the first filter 214 against the inner surface 20p of the cylindrical barrel 20 is made uniform around the entire circumference.

[0049] As a result, the first pressing member 212 can be pressed against the adsorbent 10 (in the direction of arrow F in the figure) without creating a gap between the peripheral edge 214p of the first filter 214 and the inner peripheral surface 20p of the cylindrical body 20.

[0050] The coil spring serving as the biasing member 213 functioning as the pressing device 300 is accommodated inside the first wall 212b and is almost completely compressed by the first plate 212a and the first bottom plate 211s in the initial stage when the adsorbent 10 is accommodated inside the cylindrical barrel 20. As a result, a force compressing the adsorbent 10 is constantly acting based on the elastic force of the biasing member 213.

[0051] (Assembly of the second outer lid 220 to the cylindrical body 20) The assembly of the second outer lid 220 to the cylindrical barrel 20 is the same as the assembly of the first outer lid 210 to the cylindrical barrel 20, except that it does not use a coil spring as the biasing member 213 that functions as the pressing device 300, and the guide part 218 for sliding, so a duplicated explanation will not be provided.

[0052] (Actions and Effects) According to the gas separation adsorption tower 1 having the above-described configuration, a force compressing the adsorbent 10 is always acting based on the elastic force of the biasing member 213. Therefore, even if the volume of the adsorbent 10 decreases as the use of the gas separation adsorption tower 1 progresses due to factors such as a change in pressure from reduced pressure to normal pressure, or wear or breakage of the adsorbent 10 caused by gas flow, it is possible to prevent this from occurring between the adsorbent 10 and the inner surface 20p of the cylindrical body 20.

[0053] As a result, the adsorbent 10 can be maintained in a compressed state regardless of the orientation of the gas separation adsorption tower 1, not limited to a vertical orientation in which the central axis CL of the cylindrical barrel 20 is vertical. As a result, no gap is generated between the adsorbent 10 and the inner circumferential surface 20p of the cylindrical barrel 20, making it possible to provide an adsorption tower for gas separation that maintains the processing performance required of the gas separation adsorption tower 1 and produces highly purified gas.

[0054] Furthermore, since the raw gas is introduced into the gas separation adsorption tower 1 along the direction in which the central axis CL of the cylindrical body 20 extends, and the purified gas is extracted along the direction in which the central axis CL of the cylindrical body 20 extends, it is expected that the occurrence of pressure loss in the gas flow direction will be suppressed, and the production efficiency of the purified gas from the raw gas will be improved.

[0055] [Embodiment 2] <Gas generator 1000> Next, a gas generator 1000 using the above-described gas separation adsorption tower 1 will be described with reference to Fig. 11. Fig. 11 is a diagram showing the configuration of the gas generator 1000.

[0056] The gas generator 1000 uses two of the above-mentioned gas separation adsorption towers 1, and while one of the gas separation adsorption towers 1 is processing the raw material gas (adsorption treatment), the other gas separation adsorption tower 1 is processing the adsorbent 10 (desorption treatment).By switching between the adsorption treatment and the desorption treatment, the gas generator 1000 is a swing-type gas generator that can continuously obtain purified gas from the raw material gas.

[0057] An adsorption tower circuit 1300, in which two gas separation adsorption towers 1 are switchably installed, is connected to a gas delivery circuit 1100 and a gas extraction circuit 1200. The gas delivery circuit 1100, which delivers the raw gas, includes an air compressor 1110 that compresses air as the raw gas, a filter device 1112, and an activated carbon tank 1114. The gas extraction circuit 1200, which extracts the purified gas, includes a product tank 1210, a gas concentration meter 1211 (oxygen concentration meter), a pressure reducing valve with a filter 1212, and a flow meter 1213.

[0058] In the adsorption tower circuit 1300, when raw material gas is treated (adsorption treated) in one gas separation adsorption tower 1, the circuit is switched so that the gas delivery circuit 1100 is connected to the gas inlet G1 of one gas separation adsorption tower 1 and the gas extraction circuit 1200 is connected to the gas extraction unit G2. While purified gas is being produced in one gas separation adsorption tower 1, gas desorbed from the impurity-saturated adsorbent 10 in the other gas separation adsorption tower 1 is discharged through silencer 1115 and released to the atmosphere. Thereafter, the connections of one gas separation adsorption tower 1 and the other gas separation adsorption tower 1 to the gas delivery circuit 1100 and the gas extraction circuit 1200 are alternately switched, thereby continuously producing purified gas.

[0059] In this gas generation device 1000, the two gas separation adsorption towers 1 are arranged so that the direction in which the central axis CL of the cylindrical body 20 extends is horizontal, and the direction in which the raw material gas is sent out and the direction in which the purified gas is taken out are also horizontal.

[0060] This configuration allows the feed gas to be sent out and the purified gas to be extracted horizontally, thereby enabling a low profile for adsorption tower circuit 1300. As a result, gas generator 1000 can be applied to external devices that require a low profile.

[0061] In this gas generating apparatus 1000, the case where two gas separation adsorption towers 1 are arranged horizontally has been described. However, the above-mentioned gas separation adsorption tower 1 is not limited to being arranged horizontally, because the processing performance required of the gas separation adsorption tower 1 can be maintained and highly pure purified gas can be obtained regardless of the orientation in which it is arranged.

[0062] Although this gas generator 1000 has been described as a swing-type gas generator 1000 using two gas separation adsorption towers 1, it may also be a gas generator using three or more gas separation adsorption towers 1, or a short-tower gas generator that does not use a swing type.

[0063] The gas generator 1000 described above is an apparatus that uses air as the raw material gas and obtains high-purity nitrogen gas as the purified gas. However, it is also possible to use other gas generators, such as a gas generator that uses zeolite in the CMS and air as the raw material gas to obtain oxygen as the purified gas, or a gas generator that uses activated alumina in the CMS and combustion exhaust gas as the raw material gas to obtain carbon dioxide as the purified gas.

[0064] In this way, by making it possible to provide a gas separation adsorption tower that can produce highly pure purified gas regardless of the orientation of the gas separation adsorption tower used in the gas generator, and a gas generator that uses this gas separation adsorption tower, the efficiency of purified gas production can be increased, and this can contribute to some of the activities of the Sustainable Development Goals (SDGs).

[0065] The adsorption column for gas separation and the gas generator have been described above in the embodiments, but the embodiments disclosed herein are illustrative in all respects and are not limiting. The scope of the present invention is defined by the claims, and includes all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0066] 1 gas separation adsorption tower, 10 adsorbent, 20 cylindrical body, 20p inner peripheral surface, 21 first opening, 22 second opening, 210 first outer lid, 211 first side plate, 211b first bolt hole, 211h first gas inlet, 211m first O-ring groove, 211s first bottom plate, 212 first pressing member, 212a first plate, 212b first wall, 212g outer surface, 212h first through hole, 213 biasing member, 214 first filter, 214p peripheral portion, 215 first O-ring, 216 first bolt, 217 first nut, 218 guide part, 220 second outer lid, 221 second side plate, 221b second bolt hole, 221h gas outlet, 221m second O-ring groove, 221s second bottom plate, 222 Second pressing member, 222a second plate, 222b second wall, 222h second through-hole, 224 second filter, 225 second O-ring, 300 pressing device, 1000 gas generator, 1100 gas delivery circuit, 1110 air compressor, 1112 filter device, 1114 activated carbon tank, 1200 gas extraction circuit, 1210 product tank, 1211 gas concentration meter, 1212 filter-equipped pressure reducing valve, 1213 flow meter, 1300 adsorption tower circuit.

Claims

1. An adsorption tower for gas separation, which contains an adsorbent therein, and which is provided with a gas inlet section at one end into which a gas is introduced, and a gas extraction section at the other end from which the gas that has passed through the adsorbent is extracted, a cylindrical shell containing the adsorbent therein and including a first opening at one end and a second opening at the other end; a first outer lid provided to close the first opening of the cylindrical shell and including the gas inlet; a second outer cover provided to close the second opening of the cylindrical shell and including the gas extraction unit; a pressing device that applies a pressing force to the adsorbent is provided on one of the first outer lid and the second outer lid; Adsorption tower for gas separation.

2. The pressing device is provided on the first outer cover including the gas inlet portion. The adsorption column for gas separation according to claim 1.

3. The first outer cover is a first side plate fixed to the first opening and having a hole through which the gas passes; a first pressing member disposed on the adsorbent side and having a hole through which the gas passes; a biasing member disposed between the first side plate and the first pressing member and pressing the first pressing member against the adsorbent material. The gas separation adsorption column according to claim 2.

4. The biasing member is at least one coil spring. The gas separation adsorption column according to claim 3.

5. a first filter is further provided between the adsorbent and the first pressing member to prevent the adsorbent from passing through and to allow the gas to pass through; The first filter is fixed to the first pressing member. The gas separation adsorption column according to claim 3.

6. the first pressing member includes a cylindrical first wall located inside an inner circumferential surface of the cylindrical barrel, A guide part is fitted between the inner circumferential surface and the outer surface of the first wall. The gas separation adsorption column according to claim 3.

7. A gas generator comprising the gas separation adsorption tower according to any one of claims 1 to 6, a gas delivery circuit that delivers the gas to the gas inlet of the gas separation adsorption tower; a gas extraction circuit that extracts the gas from the gas extraction section of the gas separation adsorption tower, Gas generator.

8. The cylindrical shell is disposed horizontally, and the gas flows horizontally from the gas inlet portion toward the gas outlet portion.

8. The gas generator of claim 7.

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