Hydrogen regeneration control method and hydrogen drying system

Abstract

The application provides a hydrogen regeneration control method and a hydrogen drying system. The hydrogen drying system is provided with a liquid level sensor in a hydrogen water separator, so that a controller can monitor the liquid level in the hydrogen water separator through the liquid level sensor. Since the amount of water removed during regeneration can directly reflect whether the regeneration process is complete, the hydrogen regeneration control method obtains the monitoring data of the amount of water removed during regeneration through the controller in the hydrogen drying system, and determines that the hydrogen regeneration in the hydrogen drying system is complete when the amount of water removed during regeneration meets the regeneration stop condition, so that the determination accuracy can be improved.

Description

Technical Field

[0001] This invention relates to the field of hydrogen production technology through water electrolysis, and particularly to a hydrogen regeneration control method and a hydrogen drying system. Background Technology

[0002] Currently, hydrogen drying equipment suitable for water electrolysis hydrogen production typically employs a three-tower process, and the regeneration process is the most critical step in the three-tower process, as the completeness of drying directly determines the purity of the hydrogen.

[0003] Currently, the completeness of existing hydrogen heating and regeneration processes is mainly determined by monitoring the hydrogen outlet temperature of the hydrogen regeneration tower or by calculating the duration of the regeneration process; neither of these methods can directly indicate whether the regeneration process is complete. Summary of the Invention

[0004] In view of this, the present invention provides a hydrogen regeneration control method and a hydrogen drying system, so as to directly reflect whether the regeneration process is complete by means of the liquid level in the regeneration separator.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] The first aspect of this invention provides a hydrogen regeneration control method, applied to a controller of a hydrogen drying system, the hydrogen regeneration control method comprising:

[0007] Acquire monitoring data on the amount of water removed during hydrogen regeneration in the hydrogen drying system;

[0008] Based on the water volume monitoring data, determine whether the amount of water removed during regeneration meets the regeneration stop conditions;

[0009] If the amount of water removed during regeneration meets the regeneration stop condition, then the hydrogen regeneration in the hydrogen drying system is determined to be complete.

[0010] Optionally, the water monitoring data is: the detection data of the liquid level in the hydrogen gas-water separator of the hydrogen drying system.

[0011] Optionally, the regeneration stop condition includes:

[0012] The liquid level change in the hydrogen gas-water separator of the hydrogen drying system is less than the preset difference in water volume.

[0013] Optionally, before determining whether the amount of water removed during regeneration meets the regeneration stop condition, the method further includes:

[0014] Determine the hydrogen production power status of the upstream electrolyzer of the hydrogen drying system;

[0015] If the hydrogen production power status is the rated power operation status, then the regeneration stop condition is determined, including: the liquid level in the hydrogen gas-water separator in the hydrogen drying system is the preset liquid level.

[0016] Optionally, after determining the hydrogen production power state of the upstream electrolyzer of the hydrogen drying system, the method further includes:

[0017] If the hydrogen production power state is a variable power operation state, then the regeneration stop condition is determined, including: the liquid level change in the hydrogen gas-water separator in the hydrogen drying system is less than the preset water volume difference.

[0018] Optionally, while acquiring monitoring data on the amount of water removed during hydrogen regeneration in the hydrogen drying system, the method further includes: acquiring the outlet temperature of the hydrogen regeneration tower in the hydrogen drying system.

[0019] If the hydrogen production power state is a variable power operation state, then determining the regeneration stop condition also includes: the change in outlet temperature is greater than a preset temperature difference.

[0020] Optionally, the preset temperature difference is the ratio of the product of the heater power and heating time and the preset coefficient in the hydrogen drying system to the specific heat capacity of hydrogen.

[0021] Optionally, after determining that the hydrogen regeneration in the hydrogen drying system is complete, the method further includes:

[0022] The heater is controlled to stop heating and enter the cold blowing operation state.

[0023] A second aspect of the present invention also provides a hydrogen drying system, comprising: a controller, a hydrogen regeneration tower, a hydrogen regeneration cooler, and a hydrogen-water separator; wherein,

[0024] The hydrogen regeneration tower is equipped with a heater;

[0025] The inlet of the hydrogen regeneration tower serves as the hydrogen inlet of the hydrogen drying system.

[0026] The outlet of the hydrogen regeneration tower is connected to the inlet of the hydrogen regeneration cooler;

[0027] The outlet of the hydrogen regeneration cooler is connected to the inlet of the hydrogen gas-water separator;

[0028] The outlet of the hydrogen gas-water separator serves as the hydrogen outlet of the hydrogen drying system.

[0029] The hydrogen gas-water separator is equipped with a liquid level sensor;

[0030] The heater is controlled by the controller;

[0031] The liquid level sensor is communicatively connected to the controller;

[0032] The controller is used to execute the hydrogen regeneration control method as described in any of the first aspects above.

[0033] Optional features also include: a temperature sensor;

[0034] The temperature sensor is located at the outlet of the hydrogen regeneration tower;

[0035] The temperature sensor is communicatively connected to the controller.

[0036] The hydrogen regeneration control method provided by this invention obtains monitoring data on the amount of water removed during regeneration through a controller in the hydrogen drying system. Since the amount of water removed during regeneration can directly reflect whether the regeneration process is complete, it can be determined that the hydrogen regeneration in the hydrogen drying system is complete when the amount of water removed during regeneration meets the regeneration stop condition, which can improve the accuracy of the judgment. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the structure of a hydrogen drying system provided in an embodiment of the present invention;

[0039] Figure 2 A flowchart of a hydrogen regeneration control method provided in an embodiment of the present invention;

[0040] Figure 3 This is a flowchart illustrating the hydrogen regeneration control method provided in an embodiment of the present invention.

[0041] Figure 4 This is another structural schematic diagram of the hydrogen drying system provided in an embodiment of the present invention;

[0042] Figure 5 and Figure 6 Two other specific flowcharts are provided for the hydrogen regeneration control method in the embodiments of the present invention. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] In this application, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0045] This invention provides a hydrogen regeneration control method that allows the completeness of the regeneration process to be directly fed back through the liquid level in the regeneration separator.

[0046] The hydrogen regeneration control method provided by this invention is applied to the controller of a hydrogen drying system, such as... Figure 1 As shown, the hydrogen drying system specifically includes: a controller 10, a hydrogen regeneration tower 20, a hydrogen regeneration cooler 30, and a hydrogen gas-water separator 40; wherein:

[0047] A heater is installed inside the hydrogen regeneration tower 20, and the heater is controlled by the controller 10. The inlet of the hydrogen regeneration tower 20 serves as the hydrogen inlet of the hydrogen drying system, the outlet of the hydrogen regeneration tower 20 is connected to the inlet of the hydrogen regeneration cooler 30, the outlet of the hydrogen regeneration cooler 30 is connected to the inlet of the hydrogen gas-water separator 40, and the outlet of the hydrogen gas-water separator 40 serves as the hydrogen outlet of the hydrogen drying system.

[0048] The hydrogen regeneration control method is as follows: Figure 2 As shown, it specifically includes:

[0049] S101. Obtain monitoring data on the amount of water removed during hydrogen regeneration in the hydrogen drying system.

[0050] In practical applications, this water monitoring data can be: the detection data of the liquid level inside the hydrogen gas-water separator 40; and specifically, it can be from... Figure 1 The controller 10 shown uses a liquid level sensor installed in the hydrogen gas-water separator 40 to acquire the detection data of the liquid level in the hydrogen gas-water separator 40 in real time or periodically.

[0051] The liquid level sensor in the hydrogen gas-water separator 40 can be a remote liquid level gauge to detect the liquid level in the hydrogen gas-water separator 40 and output the result to the controller 10. In practical applications, it is not limited to this; it depends on the specific application environment, and all are within the scope of protection of this application.

[0052] S102. Determine whether the amount of water removed during regeneration meets the regeneration stop condition.

[0053] The regeneration stop condition is a condition that can characterize complete regeneration, such as the liquid level change in the hydrogen gas-water separator 40 being less than the preset water volume difference.

[0054] It is worth noting that the value of the preset water volume difference can be obtained through theoretical calculation or experimental testing. In practical applications, it is not limited to this and can be determined according to the specific application environment. All of these are within the scope of protection of this application.

[0055] like Figure 2 As shown, if the amount of water removed during regeneration meets the regeneration stop condition, it means that the hydrogen in the hydrogen drying system has been completely regenerated, and step S103 is executed at this time; if the amount of water removed during regeneration does not meet the regeneration stop condition, it means that the hydrogen in the hydrogen drying system has not been completely regenerated, and step S101 is executed at this time.

[0056] S103. Determine that the hydrogen regeneration in the hydrogen drying system is complete.

[0057] Since the amount of water removed during regeneration can directly indicate whether the regeneration process is complete, the hydrogen regeneration control method provided in this embodiment obtains the monitoring data of the amount of water removed during regeneration through the controller 10 in the hydrogen drying system, and determines that the hydrogen regeneration in the hydrogen drying system is complete when the amount of water removed during regeneration meets the regeneration stop condition, which can improve the accuracy of the judgment.

[0058] Based on the above embodiments, the hydrogen regeneration control method is as follows: Figure 3 As shown, after step S101 and before step S102, the following steps are also included:

[0059] S201. Determine the hydrogen production power status of the upstream electrolyzer of the hydrogen drying system.

[0060] In practical applications, when the hydrogen production power of the electrolyzer is at its rated power, the amount of water carried out by the hydrogen is the same in different regeneration cycles. When the liquid level in the hydrogen-water separator 40 no longer rises, it indicates that the hydrogen regeneration is complete.

[0061] Therefore, if the hydrogen production power of the upstream electrolyzer of the hydrogen drying system is at its rated power operating state, then step S102 can be performed as follows: Figure 3 As shown, it includes:

[0062] S202. Determine whether the liquid level in the hydrogen gas-water separator is equal to the preset liquid level.

[0063] It is worth noting that the value of the preset liquid level can be obtained through theoretical calculation or experimental testing. In practical applications, it is not limited to this and can be determined according to the specific application environment. All of these are within the scope of protection of this application.

[0064] like Figure 3 As shown, if the liquid level in the hydrogen gas-water separator 40 is equal to the preset liquid level, it means that the hydrogen in the hydrogen drying system has been completely regenerated, and step S103 is executed; if the liquid level in the hydrogen gas-water separator 40 is not equal to the preset liquid level, it means that the hydrogen in the hydrogen drying system has not been completely regenerated, and step S101 is executed again.

[0065] In practical applications, when the hydrogen production power of the electrolyzer is in a variable power operation state, the liquid level increment in the hydrogen gas-water separator 40 is different in different regeneration cycles. When the liquid level change in the hydrogen gas-water separator 40 is extremely small, it indicates that the hydrogen regeneration is complete.

[0066] Therefore, if the hydrogen production power of the upstream electrolyzer in the hydrogen drying system is in a variable power operation state, then step S102 can be performed as follows: Figure 3 As shown, it includes:

[0067] S203. Determine whether the change in liquid level in the hydrogen gas-water separator is less than the preset difference in water volume.

[0068] like Figure 3 As shown, if the change in liquid level in the hydrogen gas-water separator 40 is less than the preset difference in water volume, it indicates that the hydrogen in the hydrogen drying system has been completely regenerated, and step S103 is executed. If the change in liquid level in the hydrogen gas-water separator 40 is not less than the preset difference in water volume, it indicates that the hydrogen in the hydrogen drying system has not been completely regenerated, and step S101 is executed again.

[0069] In practical applications, the preset difference in water volume can be [-1, 1]. Considering objective factors such as liquid level fluctuations in the hydrogen gas-water separator 40 and distortion of the remote liquid level gauge, the value of the preset difference in water volume can also be selected according to the actual working conditions. No specific limitation is made here, but it depends on the specific application environment. All of these are within the scope of protection of this application.

[0070] The hydrogen regeneration control method provided in this embodiment improves the accuracy of the hydrogen regeneration control process by judging the hydrogen production power status of the electrolyzer in the front stage of the hydrogen drying system and determining whether the hydrogen in the hydrogen drying system has been completely regenerated based on the corresponding regeneration stop conditions under different hydrogen production power statuses.

[0071] In practical applications, when hydrogen regeneration is complete, without considering the heat absorption of water desorption by the adsorbent, the outlet temperature of the hydrogen regeneration tower 20 will continue to rise as the heater continues to operate.

[0072] Therefore, this hydrogen drying system can also be used as follows: Figure 4 As shown, it is in Figure 1 The structure shown also includes a temperature sensor 50, which is located at the outlet of the hydrogen regeneration tower 20 and is communicatively connected to the controller 10.

[0073] Based on the above embodiments, optionally, if the hydrogen production power state of the upstream electrolyzer of the hydrogen drying system is in a variable power operation state, then step S101 of the hydrogen regeneration control method can also be as follows: Figure 5 As shown, it includes:

[0074] S301. Obtain the outlet temperature of the hydrogen regeneration tower and the monitoring data of the amount of water removed during hydrogen regeneration in the hydrogen drying system.

[0075] Then step S102 can be as follows: Figure 5 As shown, it includes:

[0076] S302. Determine whether the changes in outlet temperature and the liquid level in the hydrogen-water separator both meet the regeneration stop conditions.

[0077] If the temperature change at the outlet of the hydrogen regeneration tower 20 is greater than the preset temperature difference, then the temperature change at the outlet meets the regeneration conditions; otherwise, it does not. If the liquid level change in the hydrogen-water separator 40 is less than the preset water volume difference, then the liquid level change meets the regeneration conditions; otherwise, it does not.

[0078] like Figure 5 As shown, if the temperature change at the outlet of the hydrogen regeneration tower 20 is greater than the preset temperature difference, and the liquid level change in the hydrogen gas-water separator 40 is less than the preset water volume difference, it indicates that the hydrogen in the hydrogen drying system is fully regenerated, and step S103 is executed. If the temperature change at the outlet of the hydrogen regeneration tower 20 is not greater than the preset temperature difference, and / or the liquid level change in the hydrogen gas-water separator 40 is not less than the preset water volume difference, it indicates that the hydrogen in the hydrogen drying system is not fully regenerated, and step S301 is executed.

[0079] It is worth noting that the value of this preset temperature difference can be determined according to the following scheme: M = KPT / C pH2 Where M is the preset temperature difference; P is the heater power; T is the heating time; C pH2denoted as , where is the specific heat capacity of hydrogen; K is a preset coefficient. Considering that the heater will simultaneously heat the desiccant, the tower body, and the heat dissipation of the device, the value of this preset coefficient can be 0.2 or 0.3. In practical applications, it is not limited to this value, but depends on the specific application environment, and all of these are within the scope of protection of this application.

[0080] The hydrogen regeneration control method provided in this embodiment, when the hydrogen production power of the electrolyzer is in a variable power operation state, determines whether the hydrogen in the hydrogen drying system has been completely regenerated by judging the temperature change at the outlet of the hydrogen regeneration tower 20 and the liquid level change in the hydrogen gas-water separator 40, thereby improving the accuracy of the hydrogen regeneration control process.

[0081] Based on the above embodiments, optionally, the hydrogen regeneration control method can also be as follows: Figure 6 As shown, after step S103, the following steps are also included:

[0082] S401, Control the heater to stop heating and enter the cold blowing working state.

[0083] The hydrogen regeneration control method provided in this embodiment controls the heater to stop heating after the hydrogen in the hydrogen drying system is fully regenerated, so that the hydrogen drying system enters the cold blowing working state. Under the premise of ensuring complete hydrogen regeneration, the energy consumption of the hydrogen drying system is saved to the maximum extent.

[0084] The following is a complete exemplary description of the hydrogen regeneration control method. After the hydrogen drying system enters the regeneration cycle, the controller 10 controls the heater in the hydrogen regeneration tower 20 to start heating. The controller 10 establishes a data storage queue for the outlet temperature of the hydrogen regeneration tower 20 and the liquid level of the hydrogen gas-water separator 40, and stores the current data and historical minute data of the outlet temperature of the hydrogen regeneration tower 20 and the liquid level in the hydrogen gas-water separator 40.

[0085] In practical applications, the outlet temperature sequence of the hydrogen regeneration tower 20 can be: TT1, TT2, TT3…TT n The liquid level queue of the hydrogen gas-water separator 40 can be: LIT1, LIT2, LIT3...LIT n And calculate the difference between the outlet temperature of the current minute and the outlet temperature of the previous minute, i.e., ΔTT1, ΔTT2, ΔTT3…ΔTT. n-1 Simultaneously, it calculates the difference between the liquid level in the current minute and the liquid level in the previous minute, i.e., △LIT1, △LIT2, △LIT3…△LIT n-1 .

[0086] Among them, TT n Indicates the current minute's outlet temperature; LIT nThis indicates the liquid level for the current minute; the difference between the outlet temperature for each current minute and the outlet temperature for the previous minute can be represented by ΔTT. n-1 =TT n -TT n-1 The calculation yields the result; simultaneously, the difference between the current minute's liquid level and the previous minute's liquid level can be calculated using ΔLIT. n-1 =LIT n -LITT n-1 The calculations yielded this result. In practical applications, the application is not limited to this; it depends on the specific application environment, and all are within the scope of protection of this application.

[0087] When △LIT n-1 ≤N and △TT n-1 When M is greater than or equal to 1, hydrogen regeneration is considered complete. At this point, controller 10 stops the heater in hydrogen regeneration tower 20 from heating.

[0088] In practical applications, N represents the preset water volume difference. The value of N is not unique. Considering objective factors such as liquid level fluctuations and distortion of remote liquid level gauges, it can be selected according to the actual working conditions, but it should be close to 0. For example, N can be [-1, 1]. M represents the preset temperature difference. The value of M can be obtained through theoretical calculations or experimental tests. In practical applications, it is not limited to this and can be determined according to the specific application environment, all of which are within the scope of protection of this application.

[0089] Compared to existing methods that control the hydrogen regeneration process solely based on hydrogen outlet temperature or time, the hydrogen regeneration control method provided in this embodiment uses the outlet temperature of the hydrogen regeneration tower 20 and the liquid level in the hydrogen gas-water separator 40 to determine whether the hydrogen has been completely regenerated. This makes the determination more accurate and the hydrogen regeneration more complete, which is beneficial for the long-term stable operation of the hydrogen drying system.

[0090] Another embodiment of the present invention also provides a hydrogen drying system, such as Figure 1 As shown, it includes: a controller 10, a hydrogen regeneration tower 20, a hydrogen regeneration cooler 30, and a hydrogen gas-water separator 40; wherein:

[0091] A heater is installed inside the hydrogen regeneration tower 20, and the heater is controlled by the controller 10. The inlet of the hydrogen regeneration tower 20 serves as the hydrogen inlet of the hydrogen drying system, and the outlet of the hydrogen regeneration tower 20 is connected to the inlet of the hydrogen regeneration cooler 30. The outlet of the hydrogen regeneration cooler 30 is connected to the inlet of the hydrogen gas-water separator 40, and the outlet of the hydrogen gas-water separator 40 serves as the hydrogen outlet of the hydrogen drying system. A liquid level sensor is installed in the hydrogen gas-water separator 40, and the liquid level sensor is communicatively connected to the controller 10.

[0092] In practical applications, the liquid level sensor can be a remote liquid level gauge to detect the liquid level in the hydrogen gas-water separator 40 and output it to the controller 10. In practical applications, it is not limited to this and can be determined according to the specific application environment, all of which are within the scope of protection of this application.

[0093] Preferably, the hydrogen drying system can also be as follows: Figure 4 As shown, it also includes a temperature sensor 50; the temperature sensor 50 is located at the outlet of the hydrogen regeneration tower 20 and is communicatively connected to the controller 10.

[0094] The hydrogen drying system provided in this embodiment uses a liquid level sensor in the hydrogen gas-water separator 40 to enable the controller 10 to control the hydrogen regeneration process based on the liquid level in the hydrogen gas-water separator 40. Simultaneously, a temperature sensor 50 is used to obtain the outlet temperature of the hydrogen regeneration tower 20. By combining the outlet temperature of the hydrogen regeneration tower 20 and the liquid level in the hydrogen gas-water separator 40, the accuracy of the hydrogen regeneration control process is improved.

[0095] Similar or identical parts between the various embodiments in this specification can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, for system or system embodiments, since they are basically similar to method embodiments, the description is relatively simple, and relevant parts can be referred to the description of the method embodiments. The systems and system embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment solution according to actual needs. Those skilled in the art can understand and implement this without creative effort.

[0096] Those skilled in the art will further recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0097] The features described above regarding the disclosed embodiments can be substituted for or combined with each other to enable those skilled in the art to implement or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for controlling hydrogen regeneration, characterized in that, A controller applied to a hydrogen drying system, wherein the hydrogen regeneration control method includes: Acquire monitoring data on the amount of water removed during hydrogen regeneration in the hydrogen drying system; Determine the hydrogen production power status of the upstream electrolyzer of the hydrogen drying system; Based on the water volume monitoring data, it is determined whether the amount of water removed during regeneration meets the regeneration stop condition; wherein, when the hydrogen production power is in rated power operation, the regeneration stop condition is determined by the liquid level in the hydrogen gas-water separator in the hydrogen drying system being at a preset liquid level; when the hydrogen production power is in variable power operation, the regeneration stop condition is determined by the liquid level change in the hydrogen gas-water separator in the hydrogen drying system being less than a preset water volume difference. If the amount of water removed during regeneration meets the regeneration stop condition, then the hydrogen regeneration in the hydrogen drying system is determined to be complete.

2. The hydrogen regeneration control method according to claim 1, characterized in that, The water monitoring data refers to the detection data of the liquid level inside the hydrogen gas-water separator in the hydrogen drying system.

3. The hydrogen regeneration control method according to claim 1, characterized in that, In addition to acquiring monitoring data on the amount of water removed during hydrogen regeneration in the hydrogen drying system, the method also includes acquiring the outlet temperature of the hydrogen regeneration tower in the hydrogen drying system. If the hydrogen production power state is a variable power operation state, then determining the regeneration stop condition also includes: the change in outlet temperature is greater than a preset temperature difference.

4. The hydrogen regeneration control method according to claim 3, characterized in that, The preset temperature difference is the ratio of the product of the heater power and heating time and the preset coefficient in the hydrogen drying system to the specific heat capacity of hydrogen.

5. The hydrogen regeneration control method according to any one of claims 1 to 2, characterized in that, After determining that the hydrogen regeneration in the hydrogen drying system is complete, the process further includes: The heater is controlled to stop heating and enter the cold blowing operation state.

6. A hydrogen drying system, characterized in that, include: Controller, hydrogen regeneration tower, hydrogen regeneration cooler, and hydrogen gas-water separator; among which, The hydrogen regeneration tower is equipped with a heater; The inlet of the hydrogen regeneration tower serves as the hydrogen inlet of the hydrogen drying system. The outlet of the hydrogen regeneration tower is connected to the inlet of the hydrogen regeneration cooler; The outlet of the hydrogen regeneration cooler is connected to the inlet of the hydrogen gas-water separator; The outlet of the hydrogen gas-water separator serves as the hydrogen outlet of the hydrogen drying system. The hydrogen gas-water separator is equipped with a liquid level sensor; The heater is controlled by the controller; The liquid level sensor is communicatively connected to the controller; The controller is used to perform the hydrogen regeneration control method as described in any one of claims 1 to 5.

7. The hydrogen drying system according to claim 6, characterized in that, Also includes: Temperature sensor; The temperature sensor is located at the outlet of the hydrogen regeneration tower; The temperature sensor is communicatively connected to the controller.

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