Adsorption tower, adsorption system and hydrogen production machine

Abstract

The utility model discloses an adsorption tower, adsorption system and hydrogen production machine, wherein the adsorption tower comprises: a tower body having an adsorption chamber for filling adsorbent, the bottom of the tower body being provided with a first vent hole, the top of the tower body being provided with a second vent hole, the first vent hole, the adsorption chamber and the second vent hole being communicated in sequence; the distributor comprises a sieve plate and a splitter plate, the sieve plate is provided with a plurality of sieve holes and arranged at the bottom of the adsorption cavity, and the splitter plate is arranged on the side, facing the first vent holes, of the sieve plate, so that gas entering from the first vent holes is dispersed by the splitter plate and then enters the adsorption cavity from the sieve holes of the sieve plate. According to the utility model, the distributor is arranged to disperse gas, so that the gas can be prevented from directly impacting on the adsorbent to damage the adsorbent; meanwhile, the gas is dispersed and then is in contact with the adsorbent after being shunted by the sieve pores, so that the gas can be in full contact with the adsorbent, the gas is prevented from passing through the adsorbent without being fully purified, and the purification effect of hydrogen is improved.

Description

Technical Field

[0001] This utility model relates to the field of pressure swing adsorption equipment technology, and in particular to an adsorption tower, an adsorption system and a hydrogen generator. Background Technology

[0002] Adsorption towers are key equipment in hydrogen generators, used for hydrogen purification or gas separation. They mainly remove impurity gases by selectively adsorbing different components in a gas mixture with an adsorbent, thereby achieving gas separation and purification to obtain high-purity hydrogen.

[0003] In existing adsorption towers, the position of the adsorbent and the flow direction of the gas to be purified are fixed. Since the gas to be purified is forced into the adsorption tower under high pressure during the adsorption process, the gas will directly impact the adsorbent, causing damage to the adsorbent. At the same time, due to the characteristics of the gas, the gas will automatically choose the optimal route to quickly pass through the adsorbent, resulting in poor gas purification effect. Utility Model Content

[0004] The main purpose of this invention is to provide an adsorption tower to solve the problem of poor purification effect of adsorption towers in the prior art.

[0005] To achieve the above objectives, this utility model proposes an adsorption tower, comprising:

[0006] The tower body has an adsorption chamber for filling with adsorbent. A first vent is located at the bottom of the tower body, and a second vent is located at the top of the tower body. The first vent, the adsorption chamber, and the second vent are sequentially connected.

[0007] A distributor includes a sieve plate and a flow divider plate. The sieve plate has a plurality of sieve holes and is located at the bottom of the adsorption chamber. The flow divider plate is located on the side of the sieve plate facing the first vent hole, so that the gas entering from the first vent hole is dispersed by the flow divider plate and then enters the adsorption chamber through the sieve holes of the sieve plate.

[0008] Optionally, the top of the adsorption chamber is provided with a distribution cylinder, and the side wall of the distribution cylinder is provided with a plurality of sieve holes. One end of the distribution cylinder is connected to the second vent hole and the other end is closed, for dispersing the gas entering from the second vent hole.

[0009] Optionally, the distributor further includes a screen and a retainer. The retainer is provided on the side of the screen plate opposite to the first vent hole, and the screen is sandwiched between the screen plate and the retainer. The screen is used to prevent the adsorbent from passing through the distributor.

[0010] Optionally, the screen has multiple layers, and the multiple layers of screen are sequentially sandwiched between the screen plate and the fixture, with the mesh openings of each screen arranged in a staggered manner.

[0011] Optionally, the adsorption chamber is provided with a plurality of partitions spaced apart along the direction of gravity, the partitions having a plurality of sieve holes, the diameter of the sieve holes being smaller than the diameter of the adsorbent; a space for filling the adsorbent is formed between adjacent partitions; the space at the top of the adsorption chamber is used to fill ceramic balls.

[0012] Optionally, three partitions are provided to divide the adsorption chamber into a first space distributed sequentially along the direction of gravity, a second space for adsorbing carbon monoxide, a third space for adsorbing carbon dioxide, and a fourth space for adsorbing water vapor, wherein the first space is used to fill the ceramic balls.

[0013] Optionally, the adsorbent filling the second space is a zeolite molecular sieve or a copper-based modified molecular sieve; the adsorbent filling the third space is activated carbon or a zeolite molecular sieve; and the adsorbent filling the fourth space is activated alumina or silica gel.

[0014] Optionally, the top of the adsorption tower is provided with a filling port, through which the adsorbent is filled into the adsorption chamber; the filling port is detachably connected to a sealing cap, the sealing cap having a second vent hole, the sealing cap being used to open or close the filling port.

[0015] This utility model also proposes an adsorption system, including several adsorption towers, pipelines, and several control valves. The adsorption towers are connected to each other through the pipelines, and the control valves are distributed on the pipelines for controlling the flow of the pipelines and regulating the flow rate.

[0016] This utility model also proposes a hydrogen generator, including the above-mentioned adsorption system and hydrogen generation device. The hydrogen generation device is connected to the adsorption system through a pipeline so that the hydrogen produced by the hydrogen generation device is purified by the adsorption system.

[0017] In this invention, the adsorption tower body has a first vent and a second vent. The adsorption chamber of the tower body is filled with adsorbent, and a distributor is provided at the bottom of the adsorption chamber. The distributor includes a sieve plate and a flow divider plate, with the flow divider plate located on the side of the sieve plate facing the first vent. During hydrogen purification, the mixed gas enters the adsorption chamber under pressure and impacts the flow divider plate, thus being dispersed. The dispersed gas then passes through the sieve holes on the sieve plate and comes into contact with the adsorbent. This avoids direct impact of the gas on the adsorbent, preventing damage. Simultaneously, the dispersed gas is diverted through the sieve holes before contacting the adsorbent, ensuring sufficient contact between the gas and the adsorbent and preventing insufficient purification before the gas passes through the adsorbent, thereby improving the hydrogen purification effect. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the adsorption tower in one embodiment of the present invention;

[0020] Figure 2 for Figure 1 Cross-sectional view of the adsorption tower;

[0021] Figure 3 for Figure 2 A magnified view of part A in the middle;

[0022] Figure 4 for Figure 2 A magnified view of part B in the middle section;

[0023] Figure 5 for Figure 2 A three-dimensional view of the adsorption tower;

[0024] Figure 6 This is a schematic diagram of the distributor in one embodiment of the present invention;

[0025] Figure 7 for Figure 3 Another structural diagram of the distributor;

[0026] Figure 8 This is a schematic diagram of the distribution cylinder in one embodiment of the present invention;

[0027] Figure 9 This is a schematic diagram of the adsorption system in one embodiment of the present invention.

[0028] Explanation of icon numbers:

[0029] name label name label Adsorption tower 100 distributor 20 Tower body 10 sieve plate 21 Adsorption chamber 11 Distributor 22 First Space 11a Fixture 23 Second Space 11b Distribution tube 30 Third Space 11c partition 40 Fourth Space 11d Sealing cap 50 First vent 12 Piping 200 Second vent 13 Control valve 300

[0030] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0033] See Figures 1 to 9 As shown, in one embodiment of the present invention, an adsorption tower 100 includes: a tower body 10 and a distributor 20; the tower body 10 has an adsorption chamber 11 for filling with adsorbent, a first vent hole 12 is provided at the bottom of the tower body 10, and a second vent hole 12 is provided at the top of the tower body 10, the first vent hole 12, the adsorption chamber 11 and the second vent hole 12 are connected in sequence; the distributor 20 includes a sieve plate 21 and a flow divider 22, the sieve plate 21 is provided with a plurality of sieve holes, the sieve plate 21 is provided at the bottom of the adsorption chamber 11, and the flow divider 22 is provided on the side of the sieve plate 21 facing the first vent hole 12, so that the gas entering from the first vent hole 12 is dispersed by the flow divider 22 and enters the adsorption chamber 11 from the sieve holes of the sieve plate 21.

[0034] In the technical solution of this utility model, the tower body 10 of the adsorption tower 100 is provided with a first vent 12 and a second vent 12. The adsorption chamber 11 of the tower body 10 is filled with adsorbent. A distributor 20 is provided at the bottom of the adsorption chamber 11. The distributor 20 includes a sieve plate 21 and a flow divider 22. The flow divider 22 is located on the side of the sieve plate 21 facing the first vent 12. When purifying hydrogen, the mixed gas enters the adsorption chamber 11 under pressure and impacts the flow divider 22, and is then dispersed by the flow divider 22. The dispersed gas is released through the sieve holes on the sieve plate 21 and comes into contact with the adsorbent. In this way, the gas can be prevented from directly impacting the adsorbent, which would damage the adsorbent. At the same time, after the gas is dispersed, it is diverted through the sieve holes on the sieve plate 21 and then comes into contact with the adsorbent, which can ensure that the gas fully contacts the adsorbent and prevents the gas from passing through the adsorbent without being fully purified, thereby improving the purification effect of hydrogen.

[0035] It should be noted that in this embodiment, the first vent 12 is an air inlet, the second vent 12 is an air outlet, the adsorption chamber 11 is filled with adsorbent, and the distributor 20 is placed on the bottom of the adsorption chamber 11. Since the adsorbent has a certain weight, it can press and fix the distributor 20 to the bottom of the adsorption chamber 11. Therefore, the distributor 20 can be installed in the adsorption chamber 11 without other connecting parts. Of course, the distributor 20 can also be installed in the adsorption chamber 11 by means of bolts, buckles, etc., or it can be fixed in the adsorption chamber 11 by means of welding, adhesion, etc., to further improve the installation stability of the distributor 20. This embodiment is not limited to this, and all of the above are within the protection scope of this utility model. Preferably, in this embodiment, the sieve plate 21 is an arc-shaped plate covering the bottom of the adsorption chamber 11. The diverter plates 22 are spaced apart on the inner arc surface of the sieve plate 21. The sieve plate 21 has a plurality of sieve holes arranged in an array. By setting the sieve plate 21 to an arc shape, the gas dispersed by the diverter plates 22 can be guided to diffuse in multiple directions, avoiding the formation of eddies or stagnant areas in right-angle regions, improving the uniformity of gas distribution, and allowing the dispersed gas to contact the adsorbent more fully, thereby improving the purification effect. At the same time, the arc-shaped surface can disperse the impact force of the gas under high pressure, further reducing the impact force of the gas on the adsorbent and preventing local over-scouring or uneven reaction. Of course, the sieve plate 21 can also be set as a flat plate with a plurality of sieve holes evenly arranged on the flat plate; it can also be set as a corrugated plate with a wavy or sawtooth surface and a plurality of sieve holes; it can also be set as a multi-layer concentric ring arrangement with a plurality of sieve holes on the ring. This embodiment is not limited to these, and all of the above are within the protection scope of this utility model. The diverter plate 22 is a circular plate. Preferably, it is arranged at certain intervals on the inner arc surface of the sieve plate 21 via connecting rods. The area of ​​the diverter plate 22 is larger than the aperture of the first vent 12 to ensure that the gas entering from the first vent 12 can fully impact the diverter plate 22. Of course, the diverter plate 22 can also be directly attached to the side of the sieve plate 21 facing the first vent 12. In this embodiment, when the adsorption tower 100 is used to purify hydrogen, the crude hydrogen mixture enters the adsorption chamber 11 from the first vent 12 under high pressure. It first impacts the diverter plate 22, which bears most of the pressure and disperses the gas. The dispersed gas spreads out in all directions and then reflects out from the sieve holes of the sieve plate 21. The dispersed gas flows upward through the adsorption chamber 11 and is then purified by the adsorbent in the adsorption chamber 11. Finally, the purified pure hydrogen is output from the second vent 12 and collected. When the adsorption tower 100 of this utility model is used to purify and refine mixed gas, it can avoid the gas directly impacting the adsorbent and causing damage to the adsorbent. Therefore, even if it is used for a long time, there is no need to replace the adsorbent, which effectively reduces costs. At the same time, after the mixed gas is dispersed, it can fully contact the adsorbent, improving the purification effect of hydrogen.

[0036] See Figures 1 to 9As shown, in one embodiment of the present invention, the top of the adsorption chamber 11 is provided with a distribution cylinder 30, and the side wall of the distribution cylinder 30 is provided with a plurality of sieve holes. One end of the distribution cylinder 30 is connected to the second vent 12 and the other end is closed, for dispersing the gas entering from the second vent 12.

[0037] Specifically, in this embodiment, the distribution cylinder 30 is a cylinder with a one-way opening. The side wall of the cylinder is evenly distributed with a number of sieve holes. The distribution cylinder 30 is located at the top of the adsorption chamber 11 and the opening is directly opposite the second vent hole 12. With this arrangement, when gas enters from the second vent hole 12, the gas will impact the bottom of the distribution cylinder 30 and then be dispersed. The dispersed gas will then be released from the sieve holes on the side wall and enter the adsorption chamber 11. It should be noted that when the adsorption tower 100 is purifying the crude hydrogen mixture, the gas enters from the bottom and exits from the top. At this time, the first vent 12 is the inlet and the second vent 12 is the outlet. When the adsorbent in the adsorption tower 100 is saturated, it will be flushed, purified, and pressurized for final filling. A portion of the purified pure hydrogen will be refluxed through the pipeline 200 and fed into the adsorption chamber 11 from the top of the adsorption tower 100. At this time, the second vent 12 is the inlet and the first vent 12 is the outlet, i.e., inlet from the top and outlet from the bottom. The pure hydrogen flows through the adsorbent to regenerate the adsorbent and is then discharged from the first vent 12. In this embodiment, by setting a distribution cylinder at the top of the adsorption tower 100, crude hydrogen purification and adsorbent purification can be completed in a single tower. In this embodiment, the adsorption tower 100 can disperse the gas regardless of whether the gas enters from the bottom or the top, avoiding the gas directly impacting the adsorbent. Due to the distribution cylinder 30, when the adsorbent is regenerated with pure hydrogen, the pure hydrogen and the adsorbent are in full contact, improving the regeneration efficiency of the adsorbent.

[0038] See Figures 1 to 9As shown, in one embodiment of this utility model, the distributor 20 further includes a screen and a fixture 23. The fixture 23 is provided on the side of the screen plate 21 away from the first vent 12. The screen is sandwiched between the screen plate 21 and the fixture 23. The screen is used to prevent the adsorbent from passing through the distributor 20. Specifically, the fixture 23 in this embodiment is a claw-shaped disc, which is fixed to the screen plate 21 by bolts. It can be understood that the fixture 23 should be designed to avoid the screen holes on the screen plate 21, so as to prevent the fixture 23 from blocking the screen holes on the screen plate 21 and causing the gas to be unable to pass through. A screen (not shown in the figure) is sandwiched between the fixture 23 and the screen plate 21. Several circular mesh holes are arranged in an array on the screen. The screen surface covers the screen plate 21. The mesh hole diameter of the screen is smaller than the adsorbent particle size. Of course, it can also be set in the form of a grid, which is not limited here. This configuration serves two purposes. First, the three-layer structure of the sieve plate 21, the sieve mesh, and the fixture 23 increases the mechanical strength of the distributor 20, preventing deformation after prolonged use. Second, by sandwiching the sieve mesh between the sieve plate 21 and the fixture 23, the adsorbent is prevented from passing through the distributor 20 and falling into the first vent 12, causing blockage. Conversely, it also prevents solid impurities or large particles carried in the gas entering through the first vent 12 from entering the adsorption chamber 11. At the same time, the sieve mesh further disperses the gas, ensuring that the fluid is evenly distributed in the adsorbent bed, allowing the gas to fully contact the adsorbent and improving the purification effect.

[0039] See Figures 1 to 9 As shown, in one embodiment of this utility model, the screen has multiple layers, which are stacked and sandwiched between the screen plate 21 and the fixture 23. The mesh openings of each screen are staggered. This arrangement serves two purposes: firstly, the multiple layers share the fluid impact force, preventing the single-layer screen from deforming or breaking due to localized high stress; secondly, the staggered structure allows for segmented interception of impurities, enabling the interception of pollutants of different particle sizes at each stage, making it difficult for impurities to continuously accumulate in a single location, reducing the probability of localized screen blockage, and further preventing the adsorbent from passing through the distributor 20, thus protecting the adsorbent bed. It should be noted that this embodiment has two layers of screens with staggered mesh openings. Of course, more than two layers can be used, preferably 2-3 layers. The mesh size of each screen can be set to be the same or different. For example, since the gas flows from bottom to top, the mesh diameter of the lower layer can be set to be larger, and the upper layer can be gradually reduced. This embodiment is not limited to this, and all of the above are within the protection scope of this utility model.

[0040] See Figures 1 to 9As shown, further, in one embodiment of this utility model, a plurality of partitions 40 are spaced apart along the direction of gravity inside the adsorption chamber 11. Each partition 40 has a plurality of sieve holes, the diameter of which is smaller than the diameter of the adsorbent. Spaces for filling the adsorbent are formed between adjacent partitions 40. The space at the top layer of the adsorption chamber 11 is used to fill ceramic balls. It should be noted that in this embodiment, the adsorption chamber 11 is divided into several spaces by the partitions 40, and different adsorbents are filled in different spaces. This separates each layer of adsorbent, making them independent of each other. Each layer of adsorbent can specifically adsorb different impurities, achieving step-by-step filtration and dedicated adsorbent for specific purposes, thus improving the adsorption performance of the adsorption tower 100. Simultaneously, the clear boundaries between each adsorbent layer help reduce the pressure inside the adsorption chamber 11, avoiding excessive pressure drop caused by an excessively thick single adsorbent bed, and saving energy. It is understood that the size of each layer of space can be adjusted according to needs by adjusting the position of the partition 40; the diameter of the sieve holes of the partition 40 is smaller than the diameter of the adsorbent that it needs to support, preventing the adsorbent in different spaces from flowing into each other. In particular, according to the direction of gravity, the space at the top of the adsorption tower 100 is filled with ceramic balls. The ceramic balls have high density and hardness. Filling the top layer with ceramic balls can compress the adsorbent below, stabilize the adsorbent bed structure, prevent the bed from loosening or collapsing, and avoid the adsorbent particles from moving or being worn by airflow impact during purification or regeneration. Furthermore, in the overall structure of the adsorption tower 100, the distribution cylinder 30 presses on the ceramic balls, which can further compress the adsorbent. Preferably, the ceramic balls in this embodiment are inert alumina ceramic balls. Inert alumina ceramic balls have the characteristics of high temperature resistance and corrosion resistance, will not react with hydrogen or impurities, and can be used for a long time in various environments.

[0041] See Figures 1 to 9 As shown, in one embodiment of this invention, three partitions 40 are provided to divide the adsorption chamber 11 into a first space 11a, a second space 11b for adsorbing carbon monoxide, a third space 11c for adsorbing carbon dioxide, and a fourth space 11d for adsorbing water vapor, distributed sequentially along the direction of gravity. The first space 11a is used to fill ceramic balls. It should be noted that in this embodiment, the adsorption chamber 11 is divided into four parts, and the crude hydrogen mixture flows from bottom to top, removing moisture, medium-sized molecules (such as carbon dioxide), and small molecules (such as carbon monoxide and nitrogen) in sequence. This avoids the small molecule adsorbent being contaminated or blocked by large molecules, or different impurities competing for adsorption on a single adsorbent, thereby improving adsorption efficiency and selectivity.

[0042] See Figures 1 to 9As shown, in one embodiment of the present invention, the adsorbent filled in the second space 11b is a zeolite molecular sieve or a copper-based modified molecular sieve; the adsorbent filled in the third space 11c is activated carbon or a zeolite molecular sieve; and the adsorbent filled in the fourth space 11d is activated alumina or silica gel. Specifically, during purification, the crude hydrogen mixture sequentially passes through the fourth space 11d, the third space 11c, the second space 11b, and the first space 11a. The fourth space 11d is filled with activated alumina or silica gel, both highly efficient desiccants that preferentially adsorb water vapor, preventing subsequent adsorbents from becoming deactivated due to water absorption and extending their lifespan. The third space 11c is filled with activated carbon, or zeolite molecular sieves with specific pore sizes. Activated carbon adsorbs large molecular impurities, carbon dioxide, methane, etc., preventing large molecules from entering the molecular sieve layer of the second space 11b and avoiding clogging the microporous structure of the molecular sieve. The second space 11b is filled with a 13X molecular sieve or a 5A molecular sieve; however, 3A or 4A molecular sieves can also be selected, depending on the specific circumstances and not limited here. The molecular sieves selectively adsorb small molecular impurities, such as carbon monoxide, through their precise pore size, achieving final deep purification. With this setup, when purifying the crude hydrogen mixture, although the molecular sieve also adsorbs carbon dioxide, the carbon dioxide is first initially absorbed by the relatively inexpensive activated carbon, and then the carbon monoxide is absorbed by the expensive molecular sieve. This avoids damage to the adsorbent and reduces costs.

[0043] See Figures 1 to 9 As shown, further, in one embodiment of this utility model, the top of the adsorption tower 100 is provided with a filling port, through which the adsorbent is filled into the adsorption chamber 11; a sealing cover 50 is detachably connected to the filling port, and the sealing cover 50 is provided with a second vent hole 12. The sealing cover 50 is used to open or close the filling port. It should be noted that the sealing cover 50 in this embodiment is a flange, and a distribution cylinder 30 is connected to one side of the flange. After the adsorbent is filled, the filling port is sealed by installing the flange. Furthermore, a sealing ring or sealing gasket can be provided between the flange and the filling port to improve the sealing performance of the tower body 10; of course, the sealing cover 50 can also adopt a rotating door structure connected by a hinge, or a compression sealing cover 50 connected by a buckle, spring lock, etc., or a sealing cover 50 that can be flipped open and closed 180° by a flipping mechanism. This embodiment is not limited to these, and all of the above are within the protection scope of this utility model. By opening a filling port at the top of the adsorption tower 100, adsorbent can be filled layer by layer from the top. After each layer of adsorbent is filled, a partition plate 40 is laid to prevent the adsorbent from leaking from the filling port.

[0044] See Figures 1 to 9As shown, this embodiment provides an adsorption system, including several adsorption towers 100, pipelines 200, and several control valves 300. The adsorption towers 100 are connected by the pipelines 200, and the control valves 300 are distributed on the pipelines 200 for controlling the flow and regulating the flow rate. It should be noted that the adsorption system in this embodiment has four adsorption towers 100 connected by the pipelines 200. Of course, systems with six or eight towers can also be used to meet the needs of large-scale chemical plants, and this is not limited here; see again... Figure 9 Taking the order from right to left as an example, the rightmost adsorption tower 100 is the first adsorption tower 100. During purification, the mixed gas enters from the first vent 12 at the bottom of the first adsorption tower 100. When it is saturated, the second adsorption tower 100 is activated by controlling the pipeline 200 through the control valve 300 to purify the mixed gas and flush the first adsorption tower 100, regenerating the adsorbent inside the tower. At this time, pure hydrogen enters from the second vent 13 at the top of the first adsorption tower 100. When any adsorption tower 100 is regenerated, the waste gas released by that adsorption tower 100 can be used by other adsorption towers 100 for final pressurization, reducing the consumption of high-purity product hydrogen and thus improving the overall recovery rate. Furthermore, each adsorption tower 100 is also connected to a pressure transmitter to detect and display the pressure inside the adsorption tower 100 in real time, facilitating monitoring and maintenance by staff. The adsorption system of this embodiment can achieve seamless process connection, ensuring continuous purification and avoiding production interruptions caused by the regeneration stage of a single tower system.

[0045] This embodiment provides a hydrogen generator, including the aforementioned adsorption system and hydrogen production device. The hydrogen production device is connected to the adsorption system via pipeline 200, so that the hydrogen produced by the hydrogen production device is purified by the adsorption system. It should be noted that in this embodiment, the hydrogen production device is connected to the first vent 12 of the adsorption tower 100 via pipeline 200. The crude hydrogen mixture produced by the hydrogen production device enters the adsorption tower 100 of the adsorption system through the first vent 12. The purity of the hydrogen after purification by the adsorption tower 100 can reach 99.999%.

[0046] The above description is only an optional embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An adsorption column, characterized by, include: The tower body has an adsorption chamber for filling with adsorbent. A first vent is located at the bottom of the tower body, and a second vent is located at the top of the tower body. The first vent, the adsorption chamber, and the second vent are sequentially connected. A distributor includes a sieve plate and a flow divider plate. The sieve plate has a plurality of sieve holes and is located at the bottom of the adsorption chamber. The flow divider plate is located on the side of the sieve plate facing the first vent hole, so that the gas entering from the first vent hole is dispersed by the flow divider plate and then enters the adsorption chamber through the sieve holes of the sieve plate.

2. The adsorption column of claim 1, wherein The top of the adsorption chamber is provided with a distribution cylinder, and the side wall of the distribution cylinder is provided with a number of sieve holes. One end of the distribution cylinder is connected to the second vent hole, and the other end is closed, which is used to disperse the gas entering from the second vent hole.

3. The adsorption column of claim 1, wherein The distributor also includes a screen and a fixture. The fixture is provided on the side of the screen plate away from the first vent. The screen is sandwiched between the screen plate and the fixture. The screen is used to prevent the adsorbent from passing through the distributor.

4. The adsorption column of claim 3, wherein The screen has multiple layers, which are sequentially sandwiched between the screen plate and the fixture, with the mesh openings of each screen arranged in a staggered manner.

5. The adsorption column of claim 1, wherein The adsorption chamber is provided with several partitions spaced apart along the direction of gravity. Each partition has several sieve holes, and the diameter of the sieve holes is smaller than the diameter of the adsorbent. The space between adjacent partitions is used to fill the adsorbent. The space at the top of the adsorption chamber is used to fill ceramic balls.

6. The adsorption column of claim 5, wherein, The adsorption chamber is provided with three partitions to divide it into a first space, a second space for adsorbing carbon monoxide, a third space for adsorbing carbon dioxide, and a fourth space for adsorbing water vapor, which are distributed sequentially along the direction of gravity. The first space is used to fill the ceramic balls.

7. The adsorption column of claim 6, wherein The adsorbent filling the second space is a zeolite molecular sieve or a copper-based modified molecular sieve; the adsorbent filling the third space is activated carbon or a zeolite molecular sieve; and the adsorbent filling the fourth space is activated alumina or silica gel.

8. The adsorption column according to any one of claims 1 to 7, characterized in that The top of the adsorption tower is provided with a filling port, through which the adsorbent is filled into the adsorption chamber; the filling port is detachably connected to a sealing cap, which is provided with a second vent hole, and the sealing cap is used to open or close the filling port.

9. An adsorption system, characterized by It includes several adsorption towers as described in any one of claims 1 to 8, pipelines, and several control valves. The several adsorption towers are connected to each other through the pipelines, and the several control valves are distributed on the pipelines for controlling the flow of the pipelines and regulating the flow rate.

10. A hydrogen generator characterized by comprising: The invention includes the adsorption system and hydrogen production device as described in claim 9, wherein the hydrogen production device is connected to the adsorption system via a pipeline so that the hydrogen produced by the hydrogen production device is purified by the adsorption system.

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