Purification tower and hydrogen production device

Abstract

The utility model discloses a purification tower and a hydrogen production device, and relates to the technical field of hydrogen production, and the purification tower comprises a tower body and a first heat exchanger; a filler cavity is formed in the tower body, a regenerated gas inlet and a regenerated gas outlet are formed in the tower body, a gas inlet channel is arranged between the regenerated gas inlet and the filler cavity, and the gas inlet channel and the regenerated gas outlet are both communicated with the filler cavity; the first heat exchanger is arranged in the air inlet channel. According to the technical scheme provided by the invention, the purification tower is arranged, so that the lower limit of the lowest operation load of the hydrogen production device can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of hydrogen production, and in particular to a purification tower and a hydrogen production device using the purification tower. Background Art

[0002] The hydrogen production and purification process involves deep deoxygenation and drying of crude hydrogen after gas-liquid separation. This drying process typically involves using molecular sieves to deeply adsorb water from the crude hydrogen. Once the molecular sieve is saturated with water, it is typically heated with sufficient regeneration gas to remove the water vapor before being cooled and purged back to operating condition. The regeneration gas is typically derived from dried hydrogen. Therefore, if the purification system load is too low, the amount of dried hydrogen is low, making the regeneration process impossible and making it difficult to reduce the minimum operating load limit of the hydrogen production unit. Utility Model Content

[0003] The main purpose of this application is to propose a purification tower, which aims to reduce the minimum operating load limit of a hydrogen production device.

[0004] To achieve the above-mentioned purpose, the purification tower proposed in the present application includes a tower body and a first heat exchanger; a packing cavity is formed in the tower body, a regeneration gas inlet and a regeneration gas outlet are provided on the tower body, an air inlet channel is provided between the regeneration gas inlet and the packing cavity, and the air inlet channel and the regeneration gas outlet are both connected to the packing cavity; the first heat exchanger is arranged in the air inlet channel.

[0005] In one embodiment, the first heat exchanger comprises:

[0006] a housing, the housing being disposed in the air intake passage;

[0007] A heat exchange tube is arranged in the shell, and at least two heat exchange tubes are provided. The gap between the at least two heat exchange tubes forms an air flow channel, and the two ends of the air flow channel are respectively connected to the regeneration gas inlet and the packing cavity.

[0008] In one embodiment, the filling chamber has a feeding port, the feeding port is arranged at the top end of the tower body, and the regeneration gas inlet is arranged at the bottom end of the tower body.

[0009] In one embodiment, the purification tower further includes a second heat exchanger connected to the outer wall of the tower body.

[0010] In one embodiment, the second heat exchanger is a jacket, which is disposed outside the tower body and forms a heat exchange channel between the jacket and the tower body.

[0011] In one embodiment, the second heat exchanger is spiral-shaped and wound outside the tower body.

[0012] In one embodiment, a third heat exchanger is provided in the filler cavity.

[0013] In one embodiment, the third heat exchanger is a serpentine tube.

[0014] In one embodiment, the regeneration gas inlet is provided with a first gas distributor;

[0015] And / or, the regeneration gas outlet is provided with a second gas distributor.

[0016] The present application also proposes a hydrogen production device, comprising the above-mentioned purification tower.

[0017] The technical solution of the present application forms a packing cavity within the tower body, thereby allowing packing to be added to the packing cavity, which can be used to absorb moisture in the gas. By providing a regeneration gas inlet and a regeneration gas outlet on the tower body, and providing an air inlet channel between the regeneration gas inlet and the packing cavity, and both the air inlet channel and the regeneration gas outlet being connected to the packing cavity, the regeneration gas can enter the air inlet channel through the regeneration gas inlet, and then enter the packing cavity through the air inlet channel, thereby regenerating the packing in the packing cavity. In other words, the moisture in the packing in the packing cavity can be heated and converted into water vapor before being discharged through the regeneration gas outlet. Furthermore, by providing a first heat exchanger within the air inlet channel, the regeneration gas entering from the regeneration gas inlet can be subjected to heat exchange treatment again. For example, the regeneration gas can be heated again by the first heat exchanger, thereby increasing the temperature of the limited amount of regeneration gas, and thereby increasing the energy of the limited amount of regeneration gas, so as to achieve a good regeneration effect on the packing in the packing cavity, while also reducing the minimum operating load limit of the hydrogen production device. Of course, after the moisture in the packing is heated into water vapor and discharged from the regeneration gas outlet, the subsequent regeneration gas can also be cooled through the first heat exchanger, so that the temperature of the limited amount of regeneration gas is lower, so that the packing in the packing cavity can be effectively restored to the working state temperature, reducing the amount of regeneration gas used and lowering the minimum operating load limit of the hydrogen production device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0019] Figure 1 This is a schematic structural diagram of an embodiment of a purification tower provided in this application;

[0020] Figure 2A schematic structural diagram of another embodiment of a purification tower provided in this application;

[0021] Figure 3 A schematic structural diagram of another embodiment of the purification tower provided in this application;

[0022] Figure 4 This is a structural diagram of an embodiment of a hydrogen production device provided in this application;

[0023] Figure 5 This is a structural schematic diagram of another embodiment of the hydrogen production device provided in this application.

[0024] Description of Figure Numbers:

[0025] 100, purification tower; 110, tower body; 111, regeneration gas inlet; 112, regeneration gas outlet; 113, feeding port; 110a, packing cavity; 110b, air inlet channel; 120, first heat exchanger; 121, shell; 122, heat exchange tube; 130, second heat exchanger; 140, third heat exchanger; 150, first gas distributor; 160, second gas distributor; 170, packing; 180, support net;

[0026] 200. Electrolytic cell;

[0027] 300, gas-liquid separator;

[0028] 400, deaerator;

[0029] 500. Heat exchange device;

[0030] 600, gas-water separator;

[0031] 700. Scrubber.

[0032] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0033] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0034] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0035] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0036] The hydrogen production and purification process is to deeply deoxygenate and dry the crude hydrogen after gas-liquid separation. The conventional drying process is to use molecular sieves to deeply adsorb water. After the molecular sieve is saturated with water, it is necessary to use regeneration gas to heat the molecular sieve to remove the saturated water adsorbed in the molecular sieve, and then use the regeneration gas to cold-blow the molecular sieve to the working state. In the related art, hydrogen drying and molecular sieve regeneration generally adopt timing control, and the drying tower is completely heated and cold-blown with regeneration gas. According to the heat balance, within a fixed switching cycle, sufficient hydrogen needs to be taken as regeneration gas to completely heat and cold-blow the drying tower containing saturated water. Usually, at least 20% of the gas volume generated by the full load operation of the hydrogen production device is required as the regeneration gas source to ensure the continuous operation of the device. The operating load corresponding to the minimum regeneration gas volume generated by the hydrogen production device is the minimum load range of the hydrogen production device. The current regeneration gas volume required for the drying tower is large, which makes it difficult to reduce the lower limit of the minimum operating load of the hydrogen production device in the related art.

[0037] In order to reduce the minimum operating load limit of the hydrogen production device, the present application proposes a purification tower.

[0038] Please refer to Figures 1 to 3 In one embodiment of the present application, the purification tower 100 includes a tower body 110 and a first heat exchanger 120; a packing cavity 110a is formed in the tower body 110, a regeneration gas inlet 111 and a regeneration gas outlet 112 are provided on the tower body 110, an air inlet channel 110b is provided between the regeneration gas inlet 111 and the packing cavity 110a, and the air inlet channel 110b and the regeneration gas outlet 112 are both connected to the packing cavity 110a; the first heat exchanger 120 is arranged in the air inlet channel 110b.

[0039] A packing cavity 110a is formed within the purification tower 100. A packing 170 is disposed within the packing cavity 110a. The packing 170 can absorb moisture from the gas entering the purification tower 100, thereby achieving a drying and purification effect on the gas. It will be appreciated that, to enable a normal drying and purification process, the tower body 110 has an air inlet for the entry of gas containing moisture and an air outlet for the exhaust of the dried gas. Specifically, the air inlet and air outlet can serve as the regeneration gas outlet 112 and regeneration gas inlet 111 in this application, or can be other openings independent of the regeneration gas outlet 112 and regeneration gas inlet 111. By providing a regeneration gas inlet 111 and a regeneration gas outlet 112 on the tower body 110, and providing an air inlet channel 110b between the regeneration gas inlet 111 and the packing cavity 110a, with both the air inlet channel 110b and the regeneration gas outlet 112 communicating with the packing cavity 110a, regeneration gas can enter the packing cavity 110a through the air inlet channel 110b, thereby regenerating the packing 170 within the packing cavity 110a. Specifically, the regeneration gas heats the packing 170, causing moisture adsorbed therein to evaporate and be discharged from the regeneration gas outlet 112 along with the regeneration gas. Furthermore, to restore the packing 170 to a working state, cooled regeneration gas can be introduced to cool the dehydrated packing 170, thereby cooling the packing 170 back to a working state. Specifically, a partition may or may not be provided between the packing cavity 110a and the air inlet channel 110b. When a partition is provided between the packing cavity 110a and the air inlet passage 110b, a mesh plate may be used as the partition to ensure that the air inlet passage 110b is in communication with the packing cavity 110a. That is, the packing cavity 110a and the air inlet passage 110b are separated by the support mesh 180, so that the support mesh 180 can also effectively support the packing 170. Furthermore, the regeneration gas inlet 111 and the regeneration gas outlet 112 in the present application may be located at opposite ends of the purification tower 100, for example, the regeneration gas inlet 111 may be located at the bottom end of the purification tower 100 and the regeneration gas outlet 112 may be located at the top end of the purification tower 100; alternatively, the regeneration gas inlet 111 may be located at the top end of the purification tower 100 and the regeneration gas outlet 112 may be located at the bottom end of the purification tower 100.

[0040] By locating the first heat exchanger 120 within the air inlet passage 110b between the regeneration gas inlet 111 and the packing cavity 110a, the regeneration gas entering the air inlet passage 110b can be passed through the first heat exchanger 120 to impart sufficient energy to the regeneration gas before regenerating the packing 170 within the packing cavity 110a. This reduces the amount of regeneration gas used, thereby lowering the minimum operating load limit of the hydrogen production device. Specifically, when the packing 170 needs to be heated, the regeneration gas is reheated by passing through the first heat exchanger 120, thereby increasing the heat content of the regeneration gas. According to the principle of heat balance, this ensures that a smaller amount of regeneration gas has sufficient energy to regenerate the packing 170, thereby reducing the amount of regeneration gas and lowering the minimum operating load limit of the hydrogen production device. Of course, it is understood that when the packing 170 needs to be cooled, the temperature of the regeneration gas can be further reduced by changing the first heat exchanger 120, so that less regeneration gas is sufficient to cool the packing 170. According to the principle of heat balance, this can ensure that less regeneration gas has the ability to cool the packing 170 to the working state, thereby also reducing the minimum operating load limit of the hydrogen production device. Specifically, a heat exchange medium is provided in the first heat exchanger 120. The heat exchange medium can be a medium for heating to heat the packing 170, thereby converting the moisture adsorbed by the packing 170 into water vapor and carrying it away through the regeneration gas; the heat exchange medium for heating can be steam, hot water, or thermal oil. The heat exchange medium can also be a medium for cooling to reduce the temperature of the packing 170 to the temperature of the normal working state; the heat exchange medium for cooling can be cooling water, chilled water, liquid nitrogen, or liquid oxygen, etc.

[0041] The technical solution of the present application forms a packing cavity 110a in the tower body 110, and a packing 170 can be added to the packing cavity 110a. The packing 170 can be used to absorb moisture in the gas. By providing a regeneration gas inlet 111 and a regeneration gas outlet 112 on the tower body 110, and providing an air inlet channel 110b between the regeneration gas inlet 111 and the packing cavity 110a, and both the air inlet channel 110b and the regeneration gas outlet 112 are connected to the packing cavity 110a, the regeneration gas can enter the air inlet channel 110b through the regeneration gas inlet 111, and then enter the packing cavity 110a through the air inlet channel 110b, so as to regenerate the packing 170 in the packing cavity 110a. That is, the moisture in the packing 170 in the packing cavity 110a can be heated and converted into water vapor, which can then be discharged through the regeneration gas outlet 112. By further providing a first heat exchanger 120 within the air inlet 110b, the regenerated gas entering from the regenerated gas inlet 111 can be subjected to a further heat exchange treatment. For example, a high-temperature heat exchange medium can be introduced into the first heat exchanger 120 to further heat the regenerated gas, thereby increasing the temperature of the limited amount of regenerated gas, and thus increasing the energy of the limited amount of regenerated gas, thereby achieving a good heating effect on the packing 170 within the packing cavity 110a, effectively removing moisture from the packing 170, and simultaneously reducing the minimum operating load limit of the hydrogen production device. Of course, after the moisture in the packing 170 is heated to water vapor and discharged from the regenerated gas outlet, a low-temperature heat exchange medium can be introduced into the first heat exchanger 120 to cool the subsequent regenerated gas, thereby reducing the temperature of the limited amount of regenerated gas, so that the packing 170 within the packing cavity 110a can be effectively restored to the operating temperature, thereby reducing the amount of regenerated gas used and lowering the minimum operating load limit of the hydrogen production device. In addition, when a low-temperature heat exchange medium is introduced into the first heat exchanger 120 to reduce the temperature of the entire purification tower 100 to a lower temperature, it can also be used for a low-temperature hydrogen adsorption process to remove trace impurities such as nitrogen, carbon dioxide, and oxygen in the hydrogen.

[0042] Please refer to Figures 1 to 3 In some embodiments of the present application, the first heat exchanger 120 includes a shell 121 and a heat exchange tube 122. The shell 121 is arranged in the tower body 110; the heat exchange tube 122 is arranged in the air inlet channel 110b, and there are at least two heat exchange tubes 122. The gap between the at least two heat exchange tubes 122 forms an air flow channel, and the two ends of the air flow channel are respectively connected to the regeneration gas inlet 111 and the packing cavity 110a.

[0043] The first heat exchanger 120 includes a shell 121, which is disposed in the air inlet channel 110b. The shell 121 can be connected to the channel wall of the air inlet channel 110b by welding, riveting, screw connection, etc. The shell 121 of the first heat exchanger 120 can also provide good protection for the heat exchange tube 122 of the first heat exchanger 120. By providing at least two heat exchange tubes 122, the gap between the at least two heat exchange tubes 122 forms an air flow channel, and the two ends of the air flow channel are respectively connected to the regeneration gas inlet 111 and the filler cavity 110a. On the one hand, it can ensure that the regeneration gas can effectively exchange heat with the heat exchange medium in the heat exchange tube 122 when passing through the air flow channel. On the other hand, it can also reduce the need for a separate pipeline for the circulation of the regeneration gas, thereby simplifying the structure of the first heat exchanger 120.

[0044] Of course, in other examples, the first heat exchanger 120 may also include a housing 121 and at least two independent pipes disposed within the housing 121, one of the at least two pipes being configured to allow the regeneration gas to flow through, while the other of the at least two pipes being configured to allow the heat exchange medium to flow through. Specifically, the pipes for the regeneration gas to flow through and the pipes for the heat exchange medium to flow through may be arranged in a cross-network structure or in parallel, as long as heat exchange between the regeneration gas and the heat exchange medium can be achieved.

[0045] Please refer to Figures 1 to 3 In some embodiments of the present application, the filling chamber 110 a has a feeding port 113 , which is located at the top of the tower body 110 , and the regeneration gas inlet 111 is located at the bottom of the tower body 110 .

[0046] By locating the feeding port 113 at the top of the tower body 110, it is easier for the user to place the filler 170 into the filler cavity 110a. This also reduces the risk of the filler 170 quickly clogging the feeding port 113 after the filler 170 is added through the feeding port 113. Furthermore, by locating the regeneration gas inlet 111 at the bottom of the tower body 110, the regeneration gas inlet 111 and the feeding port 113 are located at opposite ends of the tower body 110, thereby reducing the risk of the first heat exchanger 120, which is located near the regeneration gas inlet 111, clogging the feeding port 113.

[0047] Please refer to Figure 2 and Figure 3 In some embodiments of the present application, the purification tower 100 further includes a second heat exchanger 130 , which is connected to the outer wall of the tower body 110 .

[0048] By further disposing a second heat exchanger 130 on the outer wall of the tower body 110, the second heat exchanger 130 can directly exchange heat with the wall surface of the tower body 110 and the packing 170 within the tower body 110. Specifically, when the wall surface of the tower body 110 and the packing 170 within the tower body 110 need to be heated, a high-temperature heat exchange medium can be introduced into the second heat exchanger 130 to assist in heating the packing 170 within the tower body 110. This can also reduce the amount of high-temperature regeneration gas used, thereby lowering the minimum operating load limit of the hydrogen production device. When the packing 170 within the tower body 110 needs to be cooled to its operating temperature, a low-temperature heat exchange medium can be introduced into the second heat exchanger 130 to assist in cooling the tower body 110 and the packing 170 within the tower body 110. This can also reduce the amount of low-temperature regeneration gas used, thereby lowering the minimum operating load limit of the hydrogen production device. In addition, by introducing a low-temperature heat exchange medium into the second heat exchanger 130 to reduce the temperature of the entire purification tower 100 to a lower temperature, it can also be used for a low-temperature hydrogen adsorption process to remove trace impurities such as nitrogen, carbon dioxide, and oxygen in the hydrogen.

[0049] Specifically, when the second heat exchanger 130 is disposed on the outer wall of the tower body 110, it can be in the form of a sleeve, a spiral coil, or include multiple heat exchange tubes 122 arranged in an annular array outside the tower body 110 and connected to the outer wall of the tower body 110. The second heat exchanger 130 has a first heat exchange medium inlet and a first heat exchange medium outlet that are interconnected. The orientation of the first heat exchange medium inlet and the first heat exchange medium outlet can be the same or opposite. To facilitate the injection of heat exchange medium into the second heat exchanger 130, a heat exchange medium source is also provided outside the purification tower 100. The first heat exchange medium inlet and the first heat exchange medium outlet of the second heat exchanger 130 are both connected to the heat exchange medium source, forming a circulation loop. This allows the heat exchange medium to maintain a long-term heat exchange effect with the tower body 110 and the packing 170 within the tower body 110.

[0050] like Figure 2 As shown, the present application provides an example of the second heat exchanger 130 . In this example, the second heat exchanger 130 is a jacket, which is disposed outside the tower body 110 and forms a heat exchange channel between the jacket and the tower body 110 .

[0051] By providing the second heat exchanger 130 as a jacket, the structure of the second heat exchanger 130 is relatively simple, making it easier to form and manufacture. Furthermore, by providing the jacket outside the tower body 110 and forming a heat exchange channel between the jacket and the tower body 110, heat exchange medium can be injected into the heat exchange channel between the jacket and the tower body 110, thereby allowing the heat exchange medium to directly contact the outer wall of the tower body 110, thereby improving the heat exchange efficiency between the heat exchange medium, the tower body 110, and the packing 170 within the tower body 110.

[0052] like Figure 3 As shown, the present application provides another example of the second heat exchanger 130 . In another example, the second heat exchanger 130 is spiral-shaped and wound outside the tower body 110 .

[0053] By setting the second heat exchanger 130 in a spiral shape and winding it outside the tower body 110, the heat exchange area of ​​the second heat exchanger 130 can be increased, thereby improving the heat exchange efficiency between the second heat exchanger 130 and the tower body 110 and between the second heat exchanger 130 and the packing 170 in the tower body 110.

[0054] Please refer to Figure 2 and Figure 3 In some embodiments of the present application, a third heat exchanger 140 is provided in the filling cavity 110a.

[0055] By further disposing a third heat exchanger 140 within the packing cavity 110a of the tower body 110, the third heat exchanger 140 can directly exchange heat with the packing 170 within the tower body 110. Specifically, when heating the packing 170 within the tower body 110 is required, a high-temperature heat exchange medium can be introduced into the third heat exchanger 140 to assist in heating the packing 170 within the tower body 110. This can also reduce the amount of high-temperature regeneration gas used, thereby lowering the minimum operating load limit of the hydrogen production apparatus. When cooling the packing 170 within the tower body 110 to its operating temperature, a low-temperature heat exchange medium can be introduced into the third heat exchanger 140 to assist in cooling the packing 170 within the tower body 110. This can also reduce the amount of low-temperature regeneration gas used, thereby lowering the minimum operating load limit of the hydrogen production apparatus. In addition, by introducing a low-temperature heat exchange medium into the third heat exchanger 140 to reduce the temperature of the entire purification tower 100 to a lower temperature, it can also be used for a low-temperature hydrogen adsorption process to remove trace impurities such as nitrogen, carbon dioxide, and oxygen in the hydrogen.

[0056] Specifically, when the third heat exchanger 140 is disposed on the outer wall of the tower body 110, it can be cylindrical, spirally coiled, or include multiple heat exchange tubes 122 arranged side by side within the tower body 110. The third heat exchanger 140 has a second heat exchange medium inlet and a second heat exchange medium outlet that are interconnected. The second heat exchange medium inlet and the second heat exchange medium outlet can be oriented in the same or opposite directions. To facilitate the injection of heat exchange medium into the third heat exchanger 140, a heat exchange medium source is provided outside the purification tower 100. The second heat exchange medium inlet and the second heat exchange medium outlet of the third heat exchanger 140 can both extend outside the tower body 110 and communicate with the heat exchange medium source. The second heat exchange medium inlet, the second heat exchange medium outlet, and the heat exchange medium source together form a circulation loop, thereby enabling the heat exchange medium to maintain a long-term heat exchange effect with the tower body 110 and the packing 170 within the tower body 110.

[0057] Please refer to Figure 2 and Figure 3 In one example, the third heat exchanger 140 is a serpentine tube, and both ends of the serpentine tube extend out of the tower body 110 .

[0058] By configuring the third heat exchanger 140 as a serpentine tube, the heat exchange area of ​​the third heat exchanger 140 can be increased, thereby improving the heat exchange efficiency between the third heat exchanger 140 and the filler 170, further reducing the amount of regeneration gas used, and thus further reducing the minimum load of the hydrogen production device.

[0059] Please refer to Figure 2 and Figure 3 In some embodiments of the present application, the purification tower 100 includes a second heat exchanger 130 and a third heat exchanger 140. The second heat exchanger 130 is connected to the outer wall of the tower body 110, and the third heat exchanger 140 is disposed in the packing cavity 110a.

[0060] The structure and effect of the second heat exchanger 130 can refer to the structure and effect of the second ventilator mentioned above, and will not be described in detail here. Similarly, the structure and effect of the third heat exchanger 140 can refer to the structure and effect of the third ventilator mentioned above, and will not be described in detail here.

[0061] By simultaneously arranging the second heat exchanger 130 and the third heat exchanger 140, the second heat exchanger 130 and the third heat exchanger 140 can simultaneously perform heat exchange on the wall surface of the tower body 110 and the filler 170 in the tower body 110 outside and inside the tower body 110, respectively, thereby further improving the heat exchange efficiency and effect of the filler 170, reducing the amount of regeneration gas used, and further reducing the minimum load operation limit of the hydrogen production device.

[0062] Please refer to Figures 1 to 3 In some embodiments of the present application, the regeneration gas inlet 111 is provided with a first gas distributor 150 .

[0063] By providing the first gas distributor 150 at the regeneration gas inlet 111, the regeneration gas can be evenly distributed through the first gas distributor 150 after passing through the regeneration gas inlet 111, thereby allowing the regeneration gas to be dispersed at different locations within the tower body 110, thereby fully exchanging heat with the packing 170 within the tower body 110, thereby achieving a good heat exchange effect with the packing 170. It should be noted that gas distributors are well known in the art, and their structure and principles will not be described in detail here.

[0064] Please refer to Figures 1 to 3 In some embodiments of the present application, the regeneration gas outlet 112 is provided with a second gas distributor 160 .

[0065] It can be understood that when the outlet of the regeneration gas is used as the gas inlet in the normal adsorption process, by setting a second gas distributor 160 at the regeneration gas outlet 112, the gas entering the tower body 110 in the normal adsorption process can be first dispersed so that the gas can be evenly distributed in the tower body 110, and then the filler 170 can evenly adsorb the moisture in the gas.

[0066] The present application also proposes a hydrogen production device, which includes a purification tower 100. The specific structure of the purification tower 100 refers to the above embodiment. Since the present hydrogen production device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0067] Specifically, please refer to Figure 4 and Figure 5 The hydrogen production device also includes an electrolyzer 200, a gas-liquid separator 300, a deoxidizer 400, etc. The electrolyzer 200 has a hydrogen outlet, the gas-liquid separator 300 has an inlet and an exhaust port, and the deoxidizer 400 has an air inlet and an air outlet. The inlet of the gas-liquid separator 300 is connected to the hydrogen outlet of the electrolyzer 200, so that the gas with electrolyte discharged from the hydrogen outlet can be roughly separated by the gas-liquid separator 300; the exhaust port of the gas-liquid separator 300 can be connected to the air inlet of the deoxidizer 400 after passing through the cooling device and the gas-water separation device, so that the gas discharged from the gas-liquid separator 300 can enter the deoxidizer 400 for deoxygenation treatment; the air outlet of the deoxidizer 400 can be connected to the purification tower 100, so as to achieve the drying and purification effect of the hydrogen.

[0068] It is understandable that if Figure 4As shown, when the electrolyte is water, the exhaust port of the gas-liquid separator 300 can be directly connected to the air inlet of the deoxidizer 400 after passing through the cooling device and the gas-water separation device; Figure 5 As shown, when the electrolyte is alkaline, a scrubber 700 can be installed on the pipeline between the exhaust port of the gas-liquid separator 300 and the cooling device to wash away the alkaline in the gas. To obtain hydrogen at an appropriate temperature, a heat exchanger 500 and a gas-water separator 600 can also be installed between the deoxidizer 400 and the purification tower 100. The high-temperature gas discharged from the outlet of the deoxidizer 400 is cooled by the heat exchanger 500 and then subjected to preliminary gas-water separation. The gas then enters the purification tower 100 to absorb the small amount of water contained in the gas, thereby obtaining dried, relatively pure hydrogen. In addition, the gas outlet of the deoxygenator 400 can be connected to a branch to directly enter the purification tower 100 as a flow path for the regenerated gas, or it can be connected to another branch separately from the gas outlet of the gas-water separator 600. A heater is provided on the branch to heat the gas and then pass it into the purification tower 100 as regenerated gas to heat the packing 170 in the purification tower 100, so that the water adsorbed in the packing 170 is converted into water vapor and discharged from the regeneration gas outlet 112 along with the regeneration gas.

[0069] The above description is merely an exemplary embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structural transformation made using the contents of the present application specification and drawings under the technical concept of the present application, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present application.

Claims

1. A purification tower, characterized in that: include: a tower body, wherein a packing cavity is formed in the tower body, a regeneration gas inlet and a regeneration gas outlet are provided on the tower body, an air inlet channel is provided between the regeneration gas inlet and the packing cavity, and the air inlet channel and the regeneration gas outlet are both in communication with the packing cavity; and A first heat exchanger is provided in the air intake passage.

2. The purification tower according to claim 1, wherein The first heat exchanger comprises: a housing, the housing being disposed in the air intake passage; A heat exchange tube is arranged in the shell, and at least two heat exchange tubes are provided. The gap between the at least two heat exchange tubes forms an air flow channel, and the two ends of the air flow channel are respectively connected to the regeneration gas inlet and the packing cavity.

3. The purification tower according to claim 1, wherein The packing cavity has a feeding port, which is arranged at the top of the tower body, and the regeneration gas inlet is arranged at the bottom of the tower body.

4. The purification tower according to claim 1, wherein The purification tower further includes a second heat exchanger connected to the outer wall of the tower body.

5. The purification tower according to claim 4, wherein The second heat exchanger is a jacket, which is arranged outside the tower body and forms a heat exchange channel between the jacket and the tower body.

6. The purification tower according to claim 4, wherein The second heat exchanger is spiral-shaped and wound outside the tower body.

7. The purification tower according to any one of claims 1 to 6, wherein A third heat exchanger is provided in the packing cavity.

8. The purification tower according to claim 7, wherein The third heat exchanger is a serpentine tube.

9. The purification tower according to any one of claims 1 to 6, characterized in that The regeneration gas inlet is provided with a first gas distributor; And / or, the regeneration gas outlet is provided with a second gas distributor.

10. A hydrogen production device, characterized in that: Comprising the purification tower according to any one of claims 1 to 9.

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