Hydrogen purification device and electrolytic hydrogen production system

Abstract

The embodiment of the utility model discloses a hydrogen purification device and an electrolytic hydrogen production system, and relates to the technical field of electrolytic hydrogen production. The hydrogen purification device comprises a first drying unit, a second drying unit, a gas inlet unit and a gas outlet unit; the maximum working load of the second drying unit is larger than or equal to the minimum working load of the first drying unit and smaller than the maximum working load of the first drying unit. The air inlet unit comprises a first connecting pipe, and the first connecting pipe is connected with the first drying unit and the second drying unit. The air outlet unit comprises a second connecting pipe, and the second connecting pipe is connected with the first drying unit and the second drying unit. According to the technical scheme provided by the embodiment of the invention, the workload width of the hydrogen purification device is increased, and the operation stability and reliability of the electrolytic hydrogen production system are improved.

Description

Technical Field

[0001] The embodiments in this application relate to the field of hydrogen electrolysis technology, and in particular to a hydrogen purification device and an electrolysis hydrogen production system. Background Technology

[0002] In related technologies, most electrolytic hydrogen production systems are equipped with hydrogen purification devices to dry and purify the hydrogen generated by electrolysis, so as to reduce impurities in the gas and improve the purity of the gas output by the electrolytic hydrogen production system.

[0003] However, current hydrogen purification devices cannot operate well under low load conditions, which can easily affect the hydrogen purification effect and reduce the operational stability and reliability of the electrolytic hydrogen production system. Utility Model Content

[0004] This application provides several embodiments of a hydrogen purification device and an electrolytic hydrogen production system, aiming to improve the working load range of the hydrogen purification device and enhance the operational stability and reliability of the electrolytic hydrogen production system.

[0005] An embodiment of this application provides a hydrogen purification device comprising a first drying unit, a second drying unit, an inlet unit, and an outlet unit. The maximum working load of the second drying unit is greater than or equal to the minimum working load of the first drying unit, and less than the maximum working load of the first drying unit. The inlet unit includes a first connecting pipe, which is connected to both the first drying unit and the second drying unit. The outlet unit includes a second connecting pipe, which is connected to both the first drying unit and the second drying unit.

[0006] In one embodiment, the first drying unit includes at least three first drying towers, each first drying tower having a first interface and a second interface, the first connecting pipe being connected to the first interface of the first drying tower, and the second connecting pipe being connected to the second interface of the first drying tower.

[0007] In one embodiment, the air intake unit includes at least three first connecting pipes, each of which is connected to a first interface of at least three first drying towers, and each first connecting pipe is provided with an input control valve; the second connecting pipe is connected in parallel to a second interface of at least three first drying towers; the air intake unit includes a connecting pipe, which is connected to at least three connecting branch pipes, each of which is connected to a first connecting pipe, and each connecting branch pipe is provided with a connecting control valve.

[0008] In one embodiment, the second connecting pipe includes a first discharge pipe and a second discharge pipe, the first discharge pipe and the second discharge pipe being connected in parallel; the first discharge pipe is connected to at least three first branch pipes, the at least three first branch pipes being connected one-to-one with the second interfaces of at least three first drying towers, and the first branch pipes are provided with first control valves; the second discharge pipe is connected to at least three second branch pipes, the at least three second branch pipes being connected one-to-one with the second interfaces of at least three first drying towers, and the second branch pipes are provided with second control valves.

[0009] In one embodiment, a regeneration regulating valve is provided on the first discharge pipe, and a regeneration flow meter is provided on the second discharge pipe.

[0010] In one embodiment, the first drying unit further includes a first temperature control mechanism, which is disposed in the first drying tower.

[0011] In one embodiment, the second drying unit includes at least two second drying towers, each having a third interface and a fourth interface. The first connecting pipe is connected to the third interface of the second drying tower, and the second connecting pipe is connected to the fourth interface of the second drying tower.

[0012] In one embodiment, the air intake unit includes at least two first connecting pipes, each of which is connected to a third interface of at least two second drying towers in a one-to-one correspondence. Each first connecting pipe is equipped with an input control valve. The second connecting pipes are connected in parallel to a fourth interface of at least two second drying towers. The air intake unit also includes a connecting pipe, which is connected to at least two connecting branch pipes. Each connecting branch pipe is connected to a first connecting pipe in a one-to-one correspondence. Each connecting branch pipe is equipped with a connecting control valve.

[0013] In one embodiment, the second connecting pipe includes a third discharge pipe and a fourth discharge pipe; the third discharge pipe is connected to at least two third branch pipes, and the at least two third branch pipes are connected one-to-one with the fourth interfaces of at least two second drying towers, and the third branch pipes are provided with third control valves; the fourth discharge pipe is connected to at least two fourth branch pipes, and the at least two fourth branch pipes are connected one-to-one with the fourth interfaces of at least two second drying towers, and the fourth branch pipes are provided with fourth control valves.

[0014] In one embodiment, the second drying unit further includes a second temperature control mechanism disposed in the second drying tower.

[0015] In one embodiment, the air intake unit further includes a separator and a heat exchanger, which are sequentially disposed on the first connecting pipe.

[0016] One embodiment of this application also proposes an electrolytic hydrogen production system, which includes a preparation device, a hydrogen purification device, a storage device, and a controller. The hydrogen purification device is described above. The output end of the preparation device is connected to the inlet unit pipeline of the hydrogen purification device, and the input end of the storage device is connected to the outlet unit pipeline of the hydrogen purification device. The controller adjusts the inlet and outlet directions of the hydrogen purification device based on the operating load of the electrolytic hydrogen production system.

[0017] In the various embodiments provided in this application, the hydrogen purification device is equipped with a first drying unit and a second drying unit. The workload of the first drying unit is set to meet the demand for higher hydrogen production, while the workload of the second drying unit is set to meet the demand for lower hydrogen production. This allows the connection between the first and second connecting pipes and the first or second drying unit to be adjusted according to the gas production load of the electrolytic hydrogen production system. This enables the hydrogen purification device to stably complete the hydrogen drying operation using the first drying unit when the hydrogen production is high, while ensuring sufficient regeneration of the drying tower in the first drying unit using a higher hydrogen production volume. Simultaneously, it enables the hydrogen purification device to stably complete the hydrogen drying operation using the second drying unit when the hydrogen production is low, while ensuring sufficient regeneration of the second drying unit under lower hydrogen production volumes. This allows the hydrogen purification device to operate stably under various workloads, better meeting the purification requirements of the electrolytic hydrogen production system. Furthermore, the coordinated operation of the first and second drying units can better reduce the production cost and safety hazards of the hydrogen purification device, effectively improving its practicality and reliability. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments or prior art of this application, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. 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 A schematic diagram of the structure of an embodiment of the hydrogen purification device provided in this application;

[0020] Figure 2 for Figure 1 Hydrogen flow direction diagram of an embodiment of a hydrogen purification device;

[0021] Figure 3 for Figure 1 Hydrogen flow direction diagram of another embodiment of the hydrogen purification device.

[0022] Explanation of icon numbers:

[0023] 100. Hydrogen purification device; 10. First drying unit; 11. First drying tower; 13. First temperature control mechanism; 30. Second drying unit; 31. Second drying tower; 33. Second temperature control mechanism; 50. Inlet unit; 51. First connecting pipe; 511. Input control valve; 53. Connecting pipe; 531. Connecting branch pipe; 5311. Connecting control valve; 55. Separator; 57. Heat exchanger; 70. Outlet unit; 71. Second... Connecting pipe; 711, First discharge pipe; 7111, First branch pipe; 7113, First control valve; 7115, Regeneration control valve; 713, Second discharge pipe; 7131, Second branch pipe; 7133, Second control valve; 7135, Regeneration flow meter; 715, Third discharge pipe; 7151, Third branch pipe; 7153, Third control valve; 717, Fourth discharge pipe; 7171, Fourth branch pipe; 7173, Fourth control valve. Detailed Implementation

[0024] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings of several embodiments. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0025] It should be noted that if directional indications (such as up, down, left, right, front, back, etc.) are involved in multiple embodiments of this application, the directional indications are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0026] Furthermore, if multiple embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text implies three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0027] In related technologies, most electrolytic hydrogen production systems are equipped with hydrogen purification devices to dry and purify the hydrogen generated by electrolysis, thereby reducing impurities in the gas and improving the purity of the gas output from the electrolytic hydrogen production system. However, current hydrogen purification devices cannot operate well under low load conditions, which can easily affect the hydrogen processing efficiency of the device and reduce the operational stability and reliability of the electrolytic hydrogen production system.

[0028] Understandably, hydrogen purification devices typically include a drying tower. After the hydrogen produced by the preparation device undergoes gas-liquid separation and deoxygenation, it can be passed into the drying tower to further adsorb impurities such as water and alkali in the hydrogen, thus achieving better purification of the hydrogen and ensuring that the hydrogen produced by the electrolytic hydrogen production system meets certain purity requirements.

[0029] After a certain period of drying operation, the drying medium inside the drying tower will reach a certain water saturation state due to the increase in adsorbed moisture. At this point, the drying tower needs to be regenerated to reduce the saturation water adsorbed by the drying medium, so that the drying tower can return to a state where it can better dry the gas and ensure the stable operation of the purification unit. To reduce contamination during the regeneration of the drying tower, most drying towers utilize hydrogen output from the electrolysis hydrogen production system to form a regeneration gas flow. This regeneration gas flow is introduced into the drying tower to carry away the moisture adsorbed by the drying medium, thus achieving the regeneration of the drying tower.

[0030] Currently, most purification devices employ drying towers capable of high operating loads to meet the gas preparation requirements of electrolytic hydrogen production systems under high-load conditions. However, high-load drying towers require a certain gas flow rate during regeneration to ensure sufficient regeneration. Conversely, when the electrolytic hydrogen production system operates under low-load conditions, it cannot adequately generate the gas flow rate required for sufficient drying tower regeneration, potentially affecting the subsequent drying and purification effect on hydrogen, and consequently impacting the yield of qualified hydrogen output from the electrolytic hydrogen production unit. Currently, most electrolytic hydrogen production systems utilize compressors to pressurize the regeneration gas flow when the production unit operates at low loads to ensure better drying tower regeneration under these conditions. However, using compressors to process the regeneration gas flow carries the risk of overpressure, posing a safety hazard. Furthermore, compressors are expensive and have high maintenance costs, increasing the overall cost of the electrolytic hydrogen production system and reducing its economic efficiency and practicality. Therefore, to address these issues, this application proposes a hydrogen purification device 100.

[0031] Please see Figures 1 to 3In one embodiment of this application, the hydrogen purification device 100 includes a first drying unit 10, a second drying unit 30, an air inlet unit 50, and an air outlet unit 70. The maximum working load of the second drying unit 30 is greater than or equal to the minimum working load of the first drying unit 10, and less than the maximum working load of the first drying unit 10. The air inlet unit 50 includes a first connecting pipe 51, which is connected to the first drying unit 10 and the second drying unit 30 respectively. The air outlet unit 70 includes a second connecting pipe 71, which is connected to the first drying unit 10 and the second drying unit 30 respectively.

[0032] In this application, the first drying unit 10 can integrate a drying tower with a high working load, while the second drying unit 30 can integrate a drying tower with a low working load. This allows the maximum working load of the second drying unit 30 to be greater than or equal to the minimum working load of the first drying unit 10, but less than the maximum working load of the first drying unit 10. This enables the first drying unit 10 to complete the drying operation when the amount of hydrogen is large. At the same time, since the maximum working load of the second drying unit 30 is small, the drying tower in the second drying unit 30 can be fully regenerated with a lower amount of hydrogen, allowing the second drying unit 30 to better complete the drying operation when the amount of hydrogen is low. By connecting the first drying unit 10 and the second drying unit 30 via the first connecting pipe 51 of the inlet unit 50, and connecting the first drying unit 10 and the second drying unit 30 via the second connecting pipe 71 of the outlet unit 70, the inlet unit 50 can be a pipeline system connected to the preparation device. The hydrogen produced by the preparation device can be transported through the first connecting pipe 51 to the first drying unit 10 or the second drying unit 30 for drying. The hydrogen can also undergo certain purification operations such as gas-liquid separation in the inlet unit 50. The outlet unit 70 can be a pipeline system connected to the storage device. The hydrogen processed by the first drying unit 10 or the second drying unit 30 can be transported through the second connecting pipe 71 to the storage device for collection and storage, thereby achieving stable gas production output of the electrolytic hydrogen production system.

[0033] The hydrogen purification device 100 can provide a valve on the first connecting pipe 51 for the inlet unit 50, or can provide a switching device to change the connection position of the first connecting pipe 51, thereby changing the connection between the first connecting pipe 51 and the first drying unit 10 or the second drying unit 30; at the same time, the outlet unit 70 can provide a valve on the second connecting pipe 71, or can provide a switching device to change the connection position of the second connecting pipe 71, thereby changing the connection between the second connecting pipe 71 and the first drying unit 10 or the second drying unit 30. Furthermore, by detecting the gas production load of the preparation device, the connection direction of the first connecting pipe 51 and the second connecting pipe 71 can be changed according to the gas production load of the preparation device. For example, when the gas production load of the preparation device is high, the second drying unit 30 cannot meet the drying requirements under the hydrogen production volume well. According to the detection results, the hydrogen purification device 100 can disconnect the connection between the first connecting pipe 51 and the second connecting pipe 71 and the second drying unit 30, and connect the first connecting pipe 51 and the second connecting pipe 71 to the first drying unit 10, so that the hydrogen purification device 100 can better meet the drying operation when the hydrogen production volume is large. For example, when the gas production load of the preparation device is low, the hydrogen production of the preparation device cannot adequately meet the regeneration requirements of the first drying unit 10. Based on the detection results, the hydrogen purification device 100 can disconnect the first connecting pipe 51 and the second connecting pipe 71 from the first drying unit 10, and connect the first connecting pipe 51 and the second connecting pipe 71 to the second drying unit 30. This allows the hydrogen purification device 100 to ensure the full regeneration of the second drying unit 30 when the hydrogen production of the preparation device is low, so that the hydrogen purification device 100 can stably complete the drying and purification of hydrogen. Because the drying tower has a lower cost, compared to the technical solution of using a compressor to pressurize hydrogen to ensure sufficient regeneration of the drying tower, the coordinated operation of the first drying unit 10 and the second drying unit 30 at different hydrogen production rates can better reduce the production cost of the hydrogen purification device 100. At the same time, by using the coordinated operation of the first drying unit 10 and the second drying unit 30, only the connection direction of the first connecting pipe 51 and the second connecting pipe 71 needs to be adjusted. The pressure fluctuation in the pipelines within the hydrogen purification device 100 is smaller, reducing the safety hazards of the hydrogen purification device 100 and effectively improving the safety performance of the hydrogen purification device 100. This, in turn, effectively improves the operational stability and reliability of the hydrogen purification device 100.

[0034] For example, the hydrogen purification device 100 can set the first drying unit 10 to a drying tower with a working load setting to meet 30% to 100% of the rated hydrogen production of the preparation device, and set the second drying unit 30 to a drying tower with a working load setting to meet 10% to 40% of the rated hydrogen production of the preparation device. This allows the hydrogen purification device 100 to better adjust the connection position of the first connecting pipe 51 and the second connecting pipe 71 by detecting the hydrogen production of the preparation device. This enables the hydrogen purification device 100 to better meet the hydrogen purification needs of the preparation device under various operating conditions, ensuring the stable and reliable operation of the electrolytic hydrogen production system.

[0035] The first drying unit 10 and the second drying unit 30 may have partially identical operating load ranges. For example, in the above embodiment, when the hydrogen production device is at 30% to 40% of its rated hydrogen production capacity, the hydrogen production capacity in this range can meet the regeneration requirements of the first drying unit 10 and the second drying unit 30. Simultaneously, both the first drying unit 10 and the second drying unit 30 can effectively complete the drying operation within this hydrogen production capacity range. Therefore, within this operating load range, the hydrogen purification device 100 can compare the operating conditions of the first drying unit 10 and the second drying unit 30 and select the drying unit with better operating conditions to perform the hydrogen drying operation at this hydrogen production capacity. For example, it can compare the continuous operating time of the first drying unit 10 and the second drying unit 30, the regeneration status of the drying tower, and other operating condition information. Alternatively, the hydrogen purification device 100 can select the drying unit that can meet the required output gas rate under this operating load to perform the hydrogen drying operation based on the required output gas rate of the electrolytic hydrogen production system. Furthermore, by overlapping the working load ranges of the first drying unit 10 and the second drying unit 30, the hydrogen purification device 100 can more rationally allocate the first drying unit 10 and the second drying unit 30 under the working load range, thereby reducing the continuous operation time of the first drying unit 10 or the second drying unit 30, which is beneficial to improving the service life of the hydrogen purification device 100 and further improving the practicality and reliability of the hydrogen purification device 100.

[0036] Understandably, the electrolytic hydrogen production system can be electrically or signal-connected to devices such as the preparation device and the hydrogen purification device 100 using a controller. This allows the controller to acquire operating load information such as the gas production status of the preparation device and send corresponding control signals to the hydrogen purification device 100 based on the acquired operating load information. This controls the gas inlet and outlet directions in the hydrogen purification device 100. In other words, under the corresponding operating load, the first connecting pipe 51 of the inlet unit 50 can be adjusted to supply gas to the first drying unit 10 or the second drying unit 30, and the second connecting pipe 71 of the outlet unit 70 can be adjusted to connect to the first drying unit 10 or the second drying unit 30 to discharge dried hydrogen. This facilitates better automation control of the electrolytic hydrogen production system and makes the operation of the hydrogen purification device 100 more convenient.

[0037] In one embodiment of this application, the hydrogen purification device 100 is equipped with a first drying unit 10 and a second drying unit 30. The workload of the first drying unit 10 is set to meet the demand for higher hydrogen production, and the workload of the second drying unit 30 is set to meet the demand for lower hydrogen production. Therefore, the connection between the first connecting pipe 51 and the second connecting pipe 71 and the first drying unit 10 or the second drying unit 30 can be adjusted according to the gas production load of the preparation device of the electrolytic hydrogen production system. This allows the hydrogen purification device 100 to stably complete the hydrogen drying operation using the first drying unit 10 when the hydrogen production is high, and to ensure sufficient regeneration of the drying tower in the first drying unit 10 using a higher hydrogen production volume. Simultaneously, the hydrogen purification device 100 can stably complete the hydrogen drying operation using the second drying unit 30 when the hydrogen production is low, and the second drying unit 30 can complete sufficient regeneration under a lower hydrogen production volume. This allows the hydrogen purification device 100 to operate stably under various working loads, better meeting the preparation and purification needs of the electrolytic hydrogen production system. Furthermore, the coordinated operation of the first drying unit 10 and the second drying unit can better reduce the production cost and safety hazards of the hydrogen purification device 100, effectively improving the practicality and reliability of the hydrogen purification device 100.

[0038] See Figure 1 and Figure 2 In one embodiment of this application, the first drying unit 10 includes at least three first drying towers 11. Each first drying tower 11 has a first interface and a second interface. A first connecting pipe 51 is connected to the first interface of the first drying tower 11, and a second connecting pipe 71 is connected to the second interface of the first drying tower 11.

[0039] In this embodiment, the first drying unit 10 may be provided with at least three first drying towers 11. A first connecting pipe 51 can be connected to the first interface of the first drying tower 11, and a second connecting pipe 71 can be connected to the second interface of the first drying tower 11, enabling the input and output of hydrogen within the first drying tower 11 and ensuring the stable operation of the hydrogen purification device 100. By utilizing the coordinated operation of at least three first drying towers 11, the first drying unit 10 can continuously dry the input hydrogen, allowing each first drying tower 11 to alternately perform drying operations and regeneration, ensuring the stable and reliable operation of the first drying unit 10. For example, the first drying unit 10 can perform hydrogen drying on a portion of the first drying tower 11 that has not reached water saturation, and perform regeneration on another portion of the first drying tower 11 that has reached water saturation. Then, after the regeneration of the portion of the first drying tower 11 is completed, the regenerated first drying tower 11 can be controlled to take over the hydrogen drying operation, thereby adjusting the first drying tower 11 that has reached water saturation from the state of performing drying operation to the state of regeneration. In this way, the continuous alternating operation of at least three first drying towers 11 ensures the continuous operation of the first drying unit 10, further improving the practicality and operational reliability of the hydrogen purification device 100.

[0040] The first drying unit 10 can control the intake unit 50 through timing control or by detecting the operating status feedback of the first drying unit 10. This allows the intake unit 50 to stably deliver the hydrogen to be dried to the first drying tower 11 that performs the drying operation by controlling the valves on the first connecting pipe 51 or switching the connection position of the first connecting pipe 51. Furthermore, the intake unit 50 can adjust the valves on the second connecting pipe 71 according to the operating status of at least three first drying towers 11, so that the first drying tower 11 performing the drying operation can stably deliver the dried hydrogen to the storage device through the second connecting pipe 71, ensuring the stable operation of the electrolytic hydrogen production system.

[0041] The intake unit 50 can connect the first connecting pipes 51 that connect at least three first drying towers 11 to each other, and the exhaust unit 70 can connect the second connecting pipes 71 that connect at least three first drying towers 11 to each other. This allows the first drying unit 10 to transport a portion of the dried hydrogen through a pipeline to the first drying tower 11 that performs the regeneration process, and to transport the regeneration gas discharged from the first drying tower 11 through a pipeline to the first drying tower 11 that can perform the drying operation for re-drying and output. This allows the at least three first drying towers 11 of the first drying unit 10 to achieve better coordinated operation, which facilitates a simpler system setup for the hydrogen purification device 100. Alternatively, the first drying unit 10 can connect the storage device to the first connecting pipe 51 or the second connecting pipe 71, and install corresponding valves on the pipes so that when the first drying tower 11 needs to perform a regeneration operation, a certain amount of dried hydrogen gas delivered to the storage device can be returned to the first drying tower 11 to regenerate the first drying tower 11 by adjusting the valves. Then, the regenerated gas flow is delivered to the first drying tower 11 that performs the drying operation for re-drying and output, ensuring the stable operation of each first drying tower 11 in the first drying unit 10, and further improving the structural stability and reliability of the hydrogen purification device 100.

[0042] See Figure 2 In one embodiment of this application, the air intake unit 50 includes at least three first connecting pipes 51, which are connected one-to-one with the first interfaces of at least three first drying towers 11, and an input control valve 511 is provided on the first connecting pipe 51; the second connecting pipe 71 is connected in parallel with the second interfaces of at least three first drying towers 11; the air intake unit 50 includes a connecting pipe 53, which is connected to at least three connecting branch pipes 531, which are connected one-to-one with the at least three first connecting pipes 51, and a connecting control valve 5311 is provided on the connecting branch pipe 531.

[0043] It is understood that each of the first drying towers 11 in the first drying unit 10 can have three operating states: main drying state, regeneration state, and secondary drying state. During the operation of the first drying unit 10, at least three first drying towers 11 can alternately perform these three operating states to ensure the continuous drying and purification of the input hydrogen by the first drying unit 10.

[0044] At this time, the first drying unit 10 can adjust the first drying tower 11 that has completed regeneration to the main drying state, the first drying tower 11 that has reached water saturation to the regeneration state, and the first drying tower 11 that has performed drying operations for a certain period of time but has not reached water saturation to the secondary drying state, based on the operating time of each first drying tower 11 or by detecting the operating conditions of each first drying tower 11. Therefore, the inlet unit 50 and outlet unit 70 can be adjusted accordingly to open the input control valve 511 on the first connecting pipe 51 connected to the first drying tower 11 in the main drying state, and to connect the second connecting pipe 71 connected to the first drying tower 11 in the main drying state to the storage device, so that the hydrogen produced by the preparation device can be stably delivered to the first drying tower 11 for drying operations, and to ensure that the first drying tower 11 stably delivers the dried hydrogen to the storage device for storage, thus ensuring the stable hydrogen purification treatment of the electrolytic hydrogen production system.

[0045] like Figure 2 As shown, Figure 2 The thick solid line with arrows indicates the direction of hydrogen flow. By setting the inlet unit 50 with a connecting pipe 53 and setting the connecting pipe 53 with at least three connecting branches 531 respectively connected to at least three first connecting pipes 51, when the first drying unit 10 is operating, the connecting control valve 5311 on the connecting branch 531 connected to the first drying tower 11 in the regeneration state and the secondary drying state can be opened, and the input control valve 511 on the first connecting pipe 51 connected to the first drying tower 11 in the regeneration state and the secondary drying state can be closed, so that the inlet unit 50 can only deliver the hydrogen output from the preparation device to the first drying tower 11 in the main drying state. By connecting the second connecting pipe 71 in parallel with the second interfaces of at least three first drying towers 11, a portion of the dried hydrogen output from the first drying tower 11 in the main drying state can be transported through the second connecting pipe 71 to the first drying tower 11 in the regeneration state. The dried hydrogen carries away the moisture in the first drying tower 11 in the regeneration state. Then, the regeneration gas carrying moisture is transported from the first connecting pipe 51 and connecting pipe 53 connected to the first drying tower 11 in the regeneration state to the first drying tower 11 in the secondary drying state. This allows the first drying tower 11 in the secondary drying state to perform drying operations on the regeneration gas flow, and the redried hydrogen is transported from the second connecting pipe 71 connected to the first drying tower 11 in the secondary drying state to the storage device. Thus, by utilizing the pipe connections between at least three first drying towers 11, the at least three first drying towers 11 can better coordinate to complete the drying output of hydrogen, the regeneration of the first drying towers 11, and the drying output of the regeneration gas flow, ensuring the continuous operation of the first drying unit 10. This facilitates a simpler structural design of the hydrogen purification device 100 and further improves the practicality and reliability of the hydrogen purification device 100.

[0046] In addition, after the first drying unit 10 has been running for a certain period of time, the valves on the pipes connected to at least three first drying towers 11 can be adjusted respectively to adjust the operating conditions of each first drying tower 11, so that each first drying tower 11 can stably alternate between the main drying state, the regeneration state and the secondary drying state, so as to better ensure the continuous operation of the first drying unit 10.

[0047] See Figure 1 and Figure 2 In one embodiment of this application, the second connecting pipe 71 includes a first discharge pipe 711 and a second discharge pipe 713, with the first discharge pipe 711 and the second discharge pipe 713 connected in parallel; the first discharge pipe 711 is connected to at least three first branch pipes 7111, and the at least three first branch pipes 7111 are connected one-to-one with the second interfaces of at least three first drying towers 11, with a first control valve 7113 provided on the first branch pipes 7111; the second discharge pipe 713 is connected to at least three second branch pipes 7131, and the at least three second branch pipes 7131 are connected one-to-one with the second interfaces of at least three first drying towers 11, with a second control valve 7133 provided on the second branch pipes 7131.

[0048] In this embodiment, when the hydrogen purification device 100 performs purification operations using the first drying unit 10, it can control the first control valve 7113 of the first branch pipe 7111 connected to the first drying tower 11 in the main drying state to open, and control the second control valve 7133 of the second branch pipe 7131 connected to the first drying tower 11 to close; it can control the first control valve 7113 of the first branch pipe 7111 connected to the first drying tower 11 in the regeneration state to open, and control the second control valve 7133 of the second branch pipe 7131 connected to the first drying tower 11 to close; at the same time, it can control the first control valve 7113 of the first branch pipe 7111 connected to the first drying tower 11 in the secondary drying state to close, and control the second control valve 7133 of the second branch pipe 7131 connected to the first drying tower 11 to open.

[0049] Furthermore, by coordinating and controlling the valves on the second connecting pipe 71, the dried hydrogen gas processed by the first drying tower 11 in the main drying state can be output through the first discharge pipe 711, and a portion of the dried hydrogen gas can be diverted through the first branch pipe 7111 to the first drying tower 11 in the regeneration state during the discharge process of the first discharge pipe 711, thereby achieving stable regeneration of the first drying tower 11. Then, the regeneration gas flow can be input into the first drying tower 11 in the secondary drying state through the first connecting pipe 51 and the connecting pipe 53 for drying treatment, so that the first drying tower 11 in the secondary drying state can output the re-dried hydrogen gas through the second branch pipe 7131, and this portion of dried hydrogen gas can be merged with the dried hydrogen gas output from the first discharge pipe 711 and transferred to the storage device for storage. This allows at least three first drying towers 11 in the first drying unit 10 to work together better, ensuring the continuous operation of the first drying unit 10 and further improving the practicality and reliability of the hydrogen purification device 100.

[0050] Furthermore, when each of the first drying towers 11 in the first drying unit 10 needs to change its operating state, the valves on the first branch pipe 7111 and the second branch pipe 7131 connected to each of the first drying towers 11 can be controlled accordingly to ensure the coordinated operation of at least three first drying towers 11, realize reliable drying of hydrogen and stable regeneration of the first drying towers 11, and further improve the practicality and reliability of the hydrogen purification device 100.

[0051] See Figure 1 and Figure 2 In one embodiment of this application, a regeneration regulating valve is provided on the first discharge pipe 711, and a regeneration flow meter 7135 is provided on the second discharge pipe 713.

[0052] In this embodiment, a regeneration regulating valve is installed on the first discharge pipe 711. This valve can regulate the gas flow rate on the first discharge pipe 711, that is, regulate the hydrogen flow rate delivered from the first discharge pipe 711 to the storage device, thereby controlling the amount of dried hydrogen diverted from the first discharge pipe 711 to the first drying tower 11 in the regeneration state. At this time, a regeneration flow meter 7135 is installed on the second discharge pipe 713. This flow meter 7135 can detect the gas flow rate on the second discharge pipe 713, that is, detect the flow rate of dried hydrogen output from the first drying tower 11 in the secondary drying state, thereby determining the flow rate of dried hydrogen input into the first drying tower 11 in the regeneration state.

[0053] Therefore, the hydrogen purification device 100 can control the regeneration control valve 7115 based on the data detected by the regeneration flow meter 7135, so that a certain amount of hydrogen can be used to regenerate the first drying tower 11 in the regeneration state, ensuring the full and reliable regeneration of the first drying tower 11, avoiding the possibility that incomplete regeneration of the first drying tower 11 may affect the drying effect of the first drying tower 11 on hydrogen, and further improving the structural stability and reliability of the hydrogen purification device 100.

[0054] See Figure 1 and Figure 2 In one embodiment of this application, the first drying unit 10 further includes a first temperature control mechanism 13, which is disposed in the first drying tower 11.

[0055] Understandably, when the first drying tower 11 is in the regeneration state, it is necessary to first introduce dry hydrogen gas at a certain temperature to vaporize the saturated water attached to the drying medium, so that the hydrogen gas can better remove the moisture in the first drying tower 11. Then, dry hydrogen gas at a lower temperature is introduced to cool down the first drying tower 11, so as to achieve stable regeneration of the first drying tower 11.

[0056] By setting a first temperature control mechanism 13 in the first drying tower 11, which may include, but is not limited to, heating wire, infrared heater, thermostat, etc., when a portion of the dried hydrogen output from the first drying tower 11 in the main drying state is transported to the first drying tower 11 in the regeneration state through the second connecting pipe 71, the first temperature control mechanism 13 can be used to adjust the temperature of the hydrogen so that the first drying tower 11 in the regeneration state can be regenerated by hot blowing with high temperature airflow and cooled by cold blowing with low temperature airflow, ensuring the stable regeneration of the first drying tower 11 and further improving the structural stability and reliability of the hydrogen purification device 100.

[0057] The first temperature control mechanism 13 can be set inside the first drying tower 11 and near the second interface; or the first temperature control mechanism 13 can be set outside the first drying tower 11 and wrapped with the second connecting pipe 71 to ensure stable temperature control of the input airflow by the first temperature control mechanism 13.

[0058] See Figure 1 and Figure 3 In one embodiment of this application, the second drying unit 30 includes at least two second drying towers 31, each having a third interface and a fourth interface. A first connecting pipe 51 is connected to the third interface of the second drying tower 31, and a second connecting pipe 71 is connected to the fourth interface of the second drying tower 31.

[0059] In this embodiment, the second drying unit 30 may be provided with at least two second drying towers 31. The first connecting pipe 51 can be connected to the third interface of the second drying tower 31, and the second connecting pipe 71 can be connected to the fourth interface of the second drying tower 31, enabling the input and output of hydrogen within the second drying tower 31 and ensuring the stable operation of the hydrogen purification device 100. By utilizing at least three second drying towers 31 working in concert, the second drying unit 30 can continuously dry the input hydrogen, allowing each second drying tower 31 to alternately perform drying operations and regeneration, ensuring the stable and reliable operation of the second drying unit 30. For example, the second drying unit 30 can perform hydrogen drying on a portion of the second drying tower 31 that has not reached water saturation, and perform regeneration on another portion of the second drying tower 31 that has reached water saturation. Then, after the regeneration of the portion of the second drying tower 31 is completed, the regenerated second drying tower 31 can be controlled to take over the hydrogen drying operation, thereby adjusting the second drying tower 31 that has reached water saturation from the state of performing drying operation to the state of regeneration. In this way, the continuous alternation of operation of at least two second drying towers 31 ensures the continuous operation of the second drying unit 30, further improving the practicality and operational reliability of the hydrogen purification device 100.

[0060] The second drying unit 30 can control the air intake unit 50 through timing control or by detecting the operating status feedback of the second drying unit 30. This allows the air intake unit 50 to control the valves on the first connecting pipe 51 or switch the connection position of the first connecting pipe 51, so that the air intake unit 50 can stably deliver the hydrogen to be dried to the second drying tower 31 that performs the drying operation. Furthermore, the valves on the second connecting pipe 71 can be adjusted according to the operating status of at least two second drying towers 31, so that the second drying tower 31 performing the drying operation can stably deliver the dried hydrogen to the storage device through the second connecting pipe 71, ensuring the stable operation of the electrolytic hydrogen production system.

[0061] The intake unit 50 can connect the first connecting pipes 51 that connect at least two second drying towers 31 to each other, and the exhaust unit 70 can connect the second connecting pipes 71 that connect at least two second drying towers 31 to each other. This allows the second drying unit 30 to transport a portion of the dried hydrogen through a pipeline to the second drying tower 31 that performs the regeneration process, and to transport the regeneration gas discharged from the second drying tower 31 through a pipeline to the second drying tower 31 that performs the drying operation for re-drying and output. This allows the at least two second drying towers 31 of the second drying unit 30 to achieve better coordinated operation, which facilitates a simpler system setup for the hydrogen purification device 100. Alternatively, the second drying unit 30 can connect the storage device to the first connecting pipe 51 or the second connecting pipe 71, and install corresponding valves on the pipes so that when the second drying tower 31 needs to perform a regeneration operation, a certain amount of dried hydrogen gas delivered to the storage device can be returned to the second drying tower 31 to regenerate the second drying tower 31 by adjusting the valves. Then, the regenerated gas flow is delivered to the second drying tower 31 that performs the drying operation for re-drying and output, ensuring the stable operation of each second drying tower 31 in the second drying unit 30, and further improving the structural stability and reliability of the hydrogen purification device 100.

[0062] See Figure 3 In one embodiment of this application, the air intake unit 50 includes at least two first connecting pipes 51, which are connected one-to-one with the third interfaces of at least two second drying towers 31. The first connecting pipes 51 are provided with input control valves 511. The second connecting pipes 71 are connected in parallel with the fourth interfaces of at least two second drying towers 31. The air intake unit 50 includes a connecting pipe 53, which is connected to at least two connecting branch pipes 531. The at least two connecting branch pipes 531 are connected one-to-one with the at least two first connecting pipes 51. The connecting branch pipes 531 are provided with connecting control valves 5311.

[0063] It is understood that each of the second drying towers 31 in the second drying unit 30 can have two operating states: drying state and regeneration state. During the operation of the second drying unit 30, at least two second drying towers 31 can alternately perform these two operating states to ensure the continuous drying and purification of the input hydrogen by the second drying unit 30.

[0064] At this time, the second drying unit 30 can adjust the second drying tower 31 that has completed regeneration to a drying state, and adjust the second drying tower 31 that has reached water saturation to a regeneration state, based on the operating time of each first drying tower 11 or by detecting the operating conditions of each second drying tower 31. Therefore, the inlet unit 50 and outlet unit 70 can be adjusted accordingly to open the input control valve 511 on the first connecting pipe 51 connected to the second drying tower 31 in the drying state, and to connect the second connecting pipe 71 connected to the second drying tower 31 in the drying state to the storage device, so that the hydrogen produced by the preparation device can be stably delivered to the second drying tower 31 for drying, and to ensure that the second drying tower 31 stably delivers the dried hydrogen to the storage device for storage, thus ensuring the stable hydrogen purification process of the electrolytic hydrogen production system.

[0065] like Figure 3 As shown, Figure 3 The thick solid line with arrows indicates the direction of hydrogen flow. By setting the inlet unit 50 with a connecting pipe 53 and setting at least two connecting branch pipes 531 to connect at least two first connecting pipes 51 respectively, when the second drying unit 30 is operating, the connecting control valve 5311 on the connecting branch pipe 531 connected to the second drying tower 31 in the regeneration state can be opened, and the input control valve 511 on the first connecting pipe 51 connected to the second drying tower 31 in the regeneration state can be closed, so that the inlet unit 50 can only deliver the hydrogen output from the preparation device to the second drying tower 31 in the drying state. By connecting the second connecting pipe 71 in parallel with the fourth interface of at least two second drying towers 31, a portion of the dried hydrogen output from the second drying tower 31 in the dry state can be transported through the second connecting pipe 71 to the second drying tower 31 in the regeneration state. The dried hydrogen carries away the moisture in the second drying tower 31 in the regeneration state. Then, the regeneration gas carrying moisture is transported from the first connecting pipe 51 and the connecting pipe 53 connected to the second drying tower 31 in the regeneration state to the second drying tower 31 in the dry state. This allows the second drying tower 31 in the dry state to perform a drying operation on the regeneration gas flow, and the re-dried hydrogen is output again through the second connecting pipe 71, ensuring the continuous and stable operation of the drying unit 30 and the stable regeneration of the second drying tower 31. This allows the pipe connection between at least two second drying towers 31 to better coordinate the drying and output of hydrogen, the regeneration of the second drying towers 31, and the drying and output of the regeneration gas flow, ensuring the continuous operation of the second drying unit 30. This also helps to simplify the structural design of the hydrogen purification device 100 and further improve the practicality and reliability of the hydrogen purification device 100.

[0066] In addition, after the second drying unit 30 has been running for a certain period of time, the valves on the pipes connected to at least two second drying towers 31 can be adjusted to adjust the operating conditions of each second drying tower 31, so that each second drying tower 31 can stably alternate between drying and regeneration states, thus better ensuring the continuous operation of the second drying unit 30.

[0067] See Figure 1 and Figure 3 In one embodiment of this application, the second connecting pipe 71 includes a third discharge pipe 715 and a fourth discharge pipe 717; the third discharge pipe 715 is connected to at least two third branch pipes 7151, and the at least two third branch pipes 7151 are connected one-to-one with the fourth interface of at least two second drying towers 31, and a third control valve 7153 is provided on the third branch pipe 7151; the fourth discharge pipe 717 is connected to at least two fourth branch pipes 7171, and the at least two fourth branch pipes 7171 are connected one-to-one with the fourth interface of at least two second drying towers 31, and a fourth control valve 7173 is provided on the fourth branch pipe 7171.

[0068] In this embodiment, when the hydrogen purification device 100 performs purification operations using the second drying unit 30, it can control the opening of the third control valve 7153 of the third branch pipe 7151 connected to the second drying tower 31 in the drying state, and control the opening of the fourth control valve 7173 of the fourth branch pipe 7171 connected to the second drying tower 31; at the same time, it can control the closing of the third control valve 7153 of the third branch pipe 7151 connected to the second drying tower 31 in the regeneration state, and control the closing of the fourth control valve 7173 of the fourth branch pipe 7171 connected to the second drying tower 31.

[0069] Furthermore, by coordinating and controlling the valves on the second connecting pipe 71, a portion of the dried hydrogen gas processed by the second drying tower 31 in the dry state can be transported to the storage device through the third discharge pipe 715, and a portion of the dried hydrogen gas can be diverted to the second drying tower 31 in the regeneration state through the fourth discharge pipe 717, thereby achieving stable regeneration of the second drying tower 31. Then, the regeneration gas flow can be returned to the second drying tower 31 in the dry state through the first connecting pipe 51 and the connecting pipe 53 for drying treatment, and the re-dried hydrogen gas can be transported to the storage device through the third discharge pipe 715 or diverted to the second drying tower 31 in the regeneration state through the fourth discharge pipe 717, thereby achieving reliable drying treatment of hydrogen gas and stable regeneration of the first drying tower 11. This allows at least two second drying towers 31 in the second drying unit 30 to work together better, ensuring the continuous operation of the second drying unit 30 and further improving the practicality and reliability of the hydrogen purification device 100.

[0070] Furthermore, when each of the second drying towers 31 in the second drying unit 30 needs to switch operating states, the valves on the third branch pipe 7151 and the fourth branch pipe 7171 connected to each second drying tower 31 can be controlled accordingly to ensure coordinated operation between at least two second drying towers 31, realize reliable drying of hydrogen and stable regeneration of the second drying towers 31, and further improve the practicality and reliability of the hydrogen purification device 100.

[0071] See Figure 1 and Figure 3 In one embodiment of this application, the second drying unit 30 further includes a second temperature control mechanism 33, which is disposed in the second drying tower 31.

[0072] Understandably, when the second drying tower 31 is in the regeneration state, it is necessary to first introduce dry hydrogen gas at a certain temperature to vaporize the saturated water attached to the drying medium, so that the hydrogen gas can better remove the moisture in the second drying tower 31. Then, dry hydrogen gas at a lower temperature is introduced to cool down the second drying tower 31, so as to achieve stable regeneration of the second drying tower 31.

[0073] By setting a second temperature control mechanism 33 in the second drying tower 31, which may include, but is not limited to, heating wire, infrared heater, thermostat, etc., when a portion of the dried hydrogen output from the second drying tower 31 in the drying state is transported to the second drying tower 31 in the regeneration state through the second connecting pipe 71, the second temperature control mechanism 33 can be used to adjust the temperature of the hydrogen. This allows the second drying tower 31 in the regeneration state to undergo hot air blowing regeneration and cold air blowing cooling, ensuring stable regeneration of the second drying tower 31 and further improving the structural stability and reliability of the hydrogen purification device 100.

[0074] The second temperature control mechanism 33 can be located inside the second drying tower 31 and near the fourth interface; or the second temperature control mechanism 33 can be located outside the second drying tower 31 and wrapped around the second connecting pipe 71 to ensure stable temperature control of the input airflow by the second temperature control mechanism 33.

[0075] See Figures 1 to 3 In one embodiment of this application, the air intake unit 50 further includes a separator 55 and a heat exchanger 57, which are sequentially disposed on the first connecting pipe 51.

[0076] In this embodiment, the intake unit 50 can be sequentially equipped with a separator 55 and a heat exchanger 57 on the first connecting pipe 51. The separator 55 can be a device for gas-liquid separation of hydrogen, and the heat exchanger 57 can be a device for heat exchange and cooling of hydrogen, so that when the hydrogen output from the preparation device is transported through the first connecting pipe 51, the separator 55 can first perform gas-liquid separation of hydrogen to reduce impurities such as alkali and water carried in the hydrogen. Then, the heat exchanger 57 is used to cool the separated gas, so that the intake unit 50 can transport relatively stable hydrogen through the first connecting pipe 51 to the first drying unit 10 or the second drying unit 30 for drying treatment, so that the hydrogen purification device 100 can perform more thorough and reliable purification treatment of the prepared hydrogen.

[0077] For example, heat exchanger 57 can be a cooling water heat exchange device. Heat exchanger 57 can have a cooling water inlet and a cooling water outlet, with an inlet pipe connected to the inlet and an outlet pipe connected to the outlet. Cooling water can be introduced into heat exchanger 57 through the inlet pipe, allowing it to exchange heat with hydrogen gas as it flows through the heat exchange pipes within heat exchanger 57. The cooled water carrying heat is then discharged through the outlet pipe, ensuring stable cooling of heat exchanger 57. Furthermore, the inlet and outlet pipes can be connected to a cooling water circulation system, allowing the cooled water carrying heat to be cooled in the circulation system before flowing back into heat exchanger 57 through the inlet pipe for further heat exchange, thus achieving cooling water circulation in heat exchanger 57 and ensuring stable operation of hydrogen purification device 100.

[0078] Furthermore, when the first drying unit 10 includes at least three first drying towers 11, the air intake unit 50 can be equipped with a separator 55 and a heat exchanger 57 on the first connecting pipe 51 connecting each first drying tower 11. This allows the air intake unit 50 to stably separate and cool hydrogen before delivering it to the first drying tower 11 for drying, ensuring the stable operation of the hydrogen purification device 100. When some of the first drying towers 11 in the first drying unit 10 are in a regeneration state, the separator 55 and heat exchanger 57 on the first connecting pipe 51 connecting the first drying tower 11 can be stopped. This allows the regeneration gas flow output from the first drying tower 11 to be delivered through the connecting pipe 53 to the first connecting pipe 51 connected to the first drying tower 11 in a secondary drying state for gas-liquid separation and cooling. This helps reduce the operating power consumption of the hydrogen purification device 100 and further improves the practicality and reliability of the hydrogen purification device 100.

[0079] Similarly, when the second drying unit 30 includes at least two second drying towers 31, the air intake unit 50 can equip each second connecting pipe 71 connecting to the second drying tower 31 with a separator 55 and a heat exchanger 57. This allows the air intake unit 50 to stably separate and cool hydrogen before delivering it to the second drying tower 31 for drying, ensuring the stable operation of the hydrogen purification device 100. When some of the second drying towers 31 in the second drying unit 30 are in regeneration mode, the separator 55 and heat exchanger 57 on the first connecting pipe 51 connected to the second drying tower 31 can be stopped. This allows the regeneration gas flow output from the second drying tower 31 to be delivered through the connecting pipe 53 to the first connecting pipe 51 connected to the second drying tower 31 in the drying mode for gas-liquid separation and cooling. This helps reduce the operating power consumption of the hydrogen purification device 100 and further improves the practicality and reliability of the hydrogen purification device 100.

[0080] Furthermore, when the first drying unit 10 includes at least three first drying towers 11 and the second drying unit 30 includes at least two second drying towers 31, the air inlet unit 50 can be equipped with first connecting branches and second connecting branches 71 on a portion of the first connecting pipes 51. The first connecting branches can be used to connect to the first interface of the first drying tower 11, and the second connecting branches can be used to connect to the third interface of the second drying tower 31. Control valves are installed on the first and second connecting branches respectively, allowing a portion of the first connecting pipes 51 to be connected in parallel to the first drying tower 11 and the second drying tower 31. This simplifies the piping design of the hydrogen purification device 100 and reduces its production cost. In this case, the control valves of the first and second connecting branches can be adjusted according to the hydrogen production conditions of the preparation device, allowing the air inlet unit 50 to deliver hydrogen to either the first drying tower 11 or the second drying tower 31 for drying operations. This ensures that the hydrogen purification device 100 can better meet the stable operation requirements under various hydrogen production conditions, further improving the structural stability and reliability of the hydrogen purification device 100. In addition, the first connecting pipe 51, which is equipped with a first connecting branch pipe and a second connecting branch pipe, can be equipped with a separator 55 and a heat exchanger 57 on the main pipe section, so that hydrogen can be stably processed by the separator 55 and the heat exchanger 57 before being transported to the first drying tower 11 or the second drying tower 31. This helps to better simplify the pipeline structure design of the hydrogen purification device 100 and further improve the practicality and reliability of the hydrogen purification device 100.

[0081] This application also proposes an electrolytic hydrogen production system, which includes a preparation device, a hydrogen purification device 100, a storage device, and a controller. The specific structure of the hydrogen purification device 100 is as described in the above embodiments. Since this electrolytic hydrogen production system adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0082] The above description is merely an exemplary embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the technical concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A hydrogen purification device, characterized in that, include: First drying unit; The second drying unit has a maximum working load that is greater than or equal to the minimum working load of the first drying unit and less than the maximum working load of the first drying unit. An intake unit, the intake unit including a first connecting pipe, the first connecting pipe being connected to the first drying unit and the second drying unit respectively; An air outlet unit, the air outlet unit including a second connecting pipe, the second connecting pipe being connected to the first drying unit and the second drying unit respectively.

2. The hydrogen purification apparatus as described in claim 1, characterized in that, The first drying unit includes at least three first drying towers, each having a first interface and a second interface. The first connecting pipe is connected to the first interface of the first drying tower, and the second connecting pipe is connected to the second interface of the first drying tower.

3. The hydrogen purification apparatus as described in claim 2, characterized in that, The air intake unit includes at least three first connecting pipes, and the at least three first connecting pipes are connected one-to-one with the first interfaces of at least three first drying towers. The first connecting pipes are equipped with input control valves. The second connecting pipe is connected in parallel with at least three second interfaces of the first drying tower. The air intake unit includes a connecting pipe, which is connected to at least three connecting branch pipes. The at least three connecting branch pipes are connected to at least three first connecting pipes in a one-to-one correspondence. A connecting control valve is provided on the connecting branch pipe.

4. The hydrogen purification apparatus as described in claim 3, characterized in that, The second connecting pipe includes a first discharge pipe and a second discharge pipe, wherein the first discharge pipe and the second discharge pipe are connected in parallel; The first discharge pipe is connected to at least three first branch pipes, and the at least three first branch pipes are connected one-to-one with the second interfaces of at least three first drying towers. The first branch pipes are equipped with first control valves. The second discharge pipe is connected to at least three second branch pipes, and the at least three second branch pipes are connected one-to-one with the second interfaces of the at least three first drying towers. The second branch pipes are equipped with second control valves.

5. The hydrogen purification apparatus as described in claim 4, characterized in that, The first discharge pipe is equipped with a regeneration regulating valve, and the second discharge pipe is equipped with a regeneration flow meter.

6. The hydrogen purification apparatus as described in claim 3, characterized in that, The first drying unit further includes a first temperature control mechanism, which is located in the first drying tower.

7. The hydrogen purification apparatus according to any one of claims 1 to 6, characterized in that, The second drying unit includes at least two second drying towers, each having a third interface and a fourth interface. The first connecting pipe is connected to the third interface of the second drying tower, and the second connecting pipe is connected to the fourth interface of the second drying tower.

8. The hydrogen purification apparatus as described in claim 7, characterized in that, The air intake unit includes at least two first connecting pipes, and the at least two first connecting pipes are connected one-to-one with the third interfaces of at least two second drying towers. The first connecting pipes are equipped with input control valves. The second connecting pipe is connected in parallel with the fourth interface of at least two second drying towers. The air intake unit includes a connecting pipe, which is connected to at least two connecting branch pipes. The at least two connecting branch pipes are connected to at least two first connecting pipes in a one-to-one correspondence. A connecting control valve is provided on the connecting branch pipe.

9. The hydrogen purification apparatus as described in claim 8, characterized in that, The second connecting pipe includes a third discharge pipe and a fourth discharge pipe; The third discharge pipe is connected to at least two third branch pipes, and the at least two third branch pipes are connected one-to-one with the fourth interface of at least two second drying towers. The third branch pipe is equipped with a third control valve. The fourth discharge pipe is connected to at least two fourth branch pipes, and the at least two fourth branch pipes are connected one-to-one with the fourth interfaces of at least two second drying towers. The fourth branch pipes are equipped with fourth control valves.

10. The hydrogen purification apparatus as described in claim 8, characterized in that, The second drying unit also includes a second temperature control mechanism, which is located in the second drying tower.

11. The hydrogen purification apparatus according to any one of claims 1 to 6 and claims 8 to 10, characterized in that, The air intake unit also includes a separator and a heat exchanger, which are sequentially mounted on the first connecting pipe.

12. An electrolytic hydrogen production system, characterized in that, The electrolytic hydrogen production system includes a preparation device, a hydrogen purification device, a storage device, and a controller. The hydrogen purification device is the hydrogen purification device according to any one of claims 1 to 11. The output end of the preparation device is connected to the inlet unit pipeline of the hydrogen purification device, and the input end of the storage device is connected to the outlet unit pipeline of the hydrogen purification device. The controller adjusts the inlet and outlet directions of the hydrogen purification device based on the operating load of the electrolytic hydrogen production system.

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