Method and device for switching regulating valve in hydrogen purification system and hydrogen purification system

Abstract

The invention provides a switching method and device for regulating valves in a hydrogen purification system and the hydrogen purification system.The real-time hydrogen flow entering the hydrogen purification system is obtained, first switching operation or second switching operation is executed according to the real-time hydrogen flow, the first switching operation includes closing a first regulating valve and opening a second regulating valve, and the second switching operation includes closing a second regulating valve and opening a third regulating valve; the second switching operation is to open the first regulating valve and close the second regulating valve. Thus, when the real-time hydrogen flow is small, the second adjusting valve with the small circulation cross section area is selected to be opened, the problem that in the prior art, an adjusting dead zone occurs can be avoided, and then the pressure fluctuation phenomenon is avoided; when the real-time hydrogen flow is large, the first adjusting valve with the large circulation cross section area is opened, and the device is more suitable for adjusting the situation of the large hydrogen flow.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen production by electrolyzing water, and particularly relates to a method and device for switching a regulating valve in a hydrogen purification system and a hydrogen purification system. Background Art

[0002] The electrolytic water hydrogen production system mainly consists of subsystems such as an electrolytic cell, a hydrogen purification system, a separation system, an auxiliary system, a public auxiliary system, and an electrical system. Among them, the hydrogen purification system is mainly used for hydrogen purification treatment to obtain high-purity hydrogen with a purity ≥ 99.99%. The hydrogen purification system mainly consists of equipment such as a deoxidation tower, a main drying tower, a regeneration drying tower, a gas-water separator, and a condenser. In the current mainstream purification scheme, a secondary drying tower is also set in the hydrogen purification system for drying the hydrogen at the outlet of the regeneration drying tower.

[0003] When the total amount of gas entering the hydrogen purification system is 20% - 25% of the rated amount, most of the gas will enter the regeneration pipeline, and the remaining small amount of gas will be discharged through the main pipeline. However, when the hydrogen purification system is designed, the regulating valve on the main pipeline is generally designed according to the hydrogen flow rate corresponding to the full-load state. When the gas flow rate through the main pipeline is too small, the regulating valve may be in the dead zone of regulation and cannot adaptively adjust the regulating valve according to the size of the gas flow rate passing through, which may then cause obvious fluctuations in the pressure of the hydrogen purification system. Summary of the Invention

[0004] One object of the present application is to provide a method for switching a regulating valve in a hydrogen purification system to solve the problem in the prior art that when the total amount of gas entering the hydrogen purification system is small, the regulating valve may be in the dead zone of regulation and cannot adaptively adjust the regulating valve according to the size of the gas flow rate passing through, which may then cause obvious fluctuations in the pressure of the hydrogen purification system. Another object of the present application is to provide a device for switching a regulating valve in a hydrogen purification system. Another object of the present application is to provide a hydrogen purification system. Another object of the present application is to provide a terminal device. Another object of the present application is to provide a computer-readable storage medium.

[0005] To achieve the above objectives, in the first aspect of the present application, a method for switching a regulating valve in a hydrogen purification system is disclosed. The method is applied to a hydrogen purification system, the hydrogen purification system includes a plurality of drying towers, each drying tower is respectively connected to a hydrogen outlet end through a main pipeline and a regeneration pipeline, the main pipeline and the regeneration pipeline are two parallel pipelines, a first regulating valve and a second regulating valve are arranged in parallel on the main channel, and the maximum flow cross-sectional area of the first regulating valve is larger than the maximum flow cross-sectional area of the second regulating valve; the method includes:

[0006] Obtain the real-time hydrogen flow rate entering the hydrogen purification system;

[0007] Perform a first switching operation or a second switching operation according to the real-time hydrogen flow rate;

[0008] Wherein, the first switching operation is to close the first regulating valve and open the second regulating valve; the second switching operation is to open the first regulating valve and close the second regulating valve.

[0009] Optionally, performing a first switching operation or a second switching operation according to the real-time hydrogen flow rate includes:

[0010] Judge whether the real-time hydrogen flow rate is less than a preset threshold. If the real-time hydrogen flow rate is less than the preset threshold, perform the first switching operation;

[0011] If the real-time hydrogen flow rate is greater than or equal to the preset threshold, perform the second switching operation.

[0012] Optionally, performing a first switching operation or a second switching operation according to the real-time hydrogen flow rate includes:

[0013] Determine the average hydrogen flow rate within a preset time period before the current moment according to the real-time hydrogen flow rate entering the hydrogen purification system;

[0014] Perform the first switching operation or the second switching operation according to the average hydrogen flow rate.

[0015] Optionally, performing a first switching operation or a second switching operation according to the average hydrogen flow rate includes:

[0016] Judge whether the average hydrogen flow rate is less than or equal to a first preset threshold. If the average hydrogen flow rate is less than or equal to the first preset threshold, perform the first switching operation;

[0017] If the average hydrogen flow rate is greater than the first preset threshold, judge whether the average hydrogen flow rate is greater than or equal to a second preset threshold;

[0018] If the average hydrogen flow rate is greater than or equal to the second preset threshold, perform the second switching operation;

[0019] Wherein, the first preset threshold is less than the second preset threshold.

[0020] Optionally, after performing the first switching operation, the method further includes:

[0021] Determine a first target valve opening degree according to the valve opening degree of the first regulating valve, the maximum flow cross-sectional area of the first regulating valve, and the maximum flow cross-sectional area of the second regulating valve at the current moment;

[0022] Control the second regulating valve to adjust according to the first target valve opening degree.

[0023] Optionally, the first target valve opening degree is determined by the following method:

[0024]

[0025] Wherein, k2' is the first target valve opening degree; k1 is the valve opening degree of the first regulating valve at the current moment; A1 is the maximum flow cross-sectional area of the first regulating valve; A2 is the maximum flow cross-sectional area of the second regulating valve.

[0026] Optionally, after performing the second switching operation, the method further includes:

[0027] Determine a second target valve opening degree according to the valve opening degree of the second regulating valve, the maximum flow cross-sectional area of the first regulating valve, and the maximum flow cross-sectional area of the second regulating valve at the current moment;

[0028] Control the first regulating valve to adjust according to the second target valve opening degree.

[0029] Optionally, the second target valve opening degree is determined by the following method:

[0030]

[0031] Wherein, k1' is the second target valve opening degree; k2 is the valve opening degree of the second regulating valve at the current moment; A1 is the maximum flow cross-sectional area of the first regulating valve; A2 is the maximum flow cross-sectional area of the second regulating valve.

[0032] In a second aspect, the present application discloses a switching device for a regulating valve in a hydrogen purification system. The device is applied to the hydrogen purification system. The hydrogen purification system includes a plurality of drying towers, and each drying tower is respectively connected to a hydrogen outlet end through a main pipeline and a regeneration pipeline. The main pipeline and the regeneration pipeline are two parallel pipelines. The main channel is provided with a first regulating valve and a second regulating valve in parallel, and the maximum flow cross-sectional area of the first regulating valve is greater than the maximum flow cross-sectional area of the second regulating valve; the device includes:

[0033] An acquisition unit for acquiring the real-time hydrogen flow rate entering the hydrogen purification system;

[0034] A processing unit for performing a first switching operation or a second switching operation according to the real-time hydrogen flow rate;

[0035] Wherein, the first switching operation is to close the first regulating valve and open the second regulating valve; the second switching operation is to open the first regulating valve and close the second regulating valve.

[0036] Optionally, the processing unit is specifically configured to:

[0037] Determine whether the real-time hydrogen flow rate is less than a preset threshold. If the real-time hydrogen flow rate is less than the preset threshold, perform the first switching operation; if the real-time hydrogen flow rate is greater than or equal to the preset threshold, perform the second switching operation.

[0038] Optionally, the processing unit is specifically configured to:

[0039] Determine the average hydrogen flow rate within a preset time period before the current moment according to the real-time hydrogen flow rate entering the hydrogen purification system; and perform the first switching operation or the second switching operation according to the average hydrogen flow rate.

[0040] Optionally, the processing unit is specifically configured to:

[0041] Determine whether the average hydrogen flow rate is less than or equal to a first preset threshold. If the average hydrogen flow rate is less than or equal to the first preset threshold, perform the first switching operation; if the average hydrogen flow rate is greater than the first preset threshold, determine whether the average hydrogen flow rate is greater than or equal to a second preset threshold; if the average hydrogen flow rate is greater than or equal to the second preset threshold, perform the second switching operation;

[0042] Wherein, the first preset threshold is less than the second preset threshold.

[0043] Optionally, the processing unit is further configured to:

[0044] Determine a first target valve opening according to the valve opening of the first regulating valve, the maximum flow cross-sectional area of the first regulating valve, and the maximum flow cross-sectional area of the second regulating valve at the current moment; and control the second regulating valve to adjust according to the first target valve opening.

[0045] Optionally, the first target valve opening is determined by the following method:

[0046]

[0047] Wherein, k2' is the opening degree of the first target valve; k1 is the opening degree of the first regulating valve at the current moment; A1 is the maximum flow cross-sectional area of the first regulating valve; A2 is the maximum flow cross-sectional area of the second regulating valve.

[0048] Optionally, the processing unit is further configured to:

[0049] Determine the opening degree of the second target valve according to the opening degree of the second regulating valve at the current moment, the maximum flow cross-sectional area of the first regulating valve, and the maximum flow cross-sectional area of the second regulating valve; and control the first regulating valve to adjust according to the opening degree of the second target valve.

[0050] Optionally, the opening degree of the second target valve is determined by the following method:

[0051]

[0052] Wherein, k1' is the opening degree of the second target valve; k2 is the opening degree of the second regulating valve at the current moment; A1 is the maximum flow cross-sectional area of the first regulating valve; A2 is the maximum flow cross-sectional area of the second regulating valve.

[0053] In a third aspect, the present application also discloses a hydrogen purification system, which includes a plurality of drying towers. Each drying tower is respectively connected to the hydrogen outlet end through a main pipeline and a regeneration pipeline. The main pipeline and the regeneration pipeline are two parallel pipelines. A first regulating valve and a second regulating valve are arranged in parallel on the main channel, and the maximum flow cross-sectional area of the first regulating valve is larger than that of the second regulating valve; the hydrogen purification system further includes:

[0054] A flow meter configured to obtain the real-time hydrogen flow rate entering the hydrogen purification system;

[0055] A controller configured to perform a first switching operation or a second switching operation according to the real-time hydrogen flow rate;

[0056] Wherein, the first switching operation is to close the first regulating valve and open the second regulating valve; the second switching operation is to open the first regulating valve and close the second regulating valve.

[0057] Optionally, the controller is specifically configured to:

[0058] Judge whether the real-time hydrogen flow rate is less than a preset threshold. If the real-time hydrogen flow rate is less than the preset threshold, perform the first switching operation; if the real-time hydrogen flow rate is greater than or equal to the preset threshold, perform the second switching operation.

[0059] Optionally, the controller is specifically configured to:

[0060] Determine the average hydrogen flow rate within a preset time period before the current moment according to the real-time hydrogen flow rate entering the hydrogen purification system; and perform the first switching operation or the second switching operation according to the average hydrogen flow rate.

[0061] Optionally, the controller is specifically configured to:

[0062] Judge whether the average hydrogen flow rate is less than or equal to a first preset threshold. If the average hydrogen flow rate is less than or equal to the first preset threshold, perform the first switching operation; if the average hydrogen flow rate is greater than the first preset threshold, judge whether the average hydrogen flow rate is greater than or equal to a second preset threshold; if the average hydrogen flow rate is greater than or equal to the second preset threshold, perform the second switching operation;

[0063] Wherein, the first preset threshold is less than the second preset threshold.

[0064] Optionally, the controller is further configured to:

[0065] Determine a first target valve opening according to the valve opening of the first regulating valve, the maximum flow cross-sectional area of the first regulating valve, and the maximum flow cross-sectional area of the second regulating valve at the current moment; and control the second regulating valve to adjust according to the first target valve opening.

[0066] Optionally, the first target valve opening is determined by the following method:

[0067]

[0068] Wherein, k2' is the first target valve opening; k1 is the valve opening of the first regulating valve at the current moment; A1 is the maximum flow cross-sectional area of the first regulating valve; A2 is the maximum flow cross-sectional area of the second regulating valve.

[0069] Optionally, the controller is further configured to:

[0070] Determine a second target valve opening according to the valve opening of the second regulating valve, the maximum flow cross-sectional area of the first regulating valve, and the maximum flow cross-sectional area of the second regulating valve at the current moment; and control the first regulating valve to adjust according to the second target valve opening.

[0071] Optionally, the second target valve opening is determined by the following method:

[0072]

[0073] Wherein, k1' is the opening degree of the second target valve; k2 is the opening degree of the second regulating valve at the current moment; A1 is the maximum flow cross-sectional area of the first regulating valve; A2 is the maximum flow cross-sectional area of the second regulating valve.

[0074] Fourthly, the present application also discloses a terminal device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the method as described above is implemented.

[0075] Fifthly, the present application also discloses a computer-readable storage medium storing a computer program, and when the computer program is executed by a processor, the method as described above is implemented.

[0076] Compared with the prior art, for the method for switching regulating valves in the hydrogen purification system provided by the present application, the real-time hydrogen flow rate entering the hydrogen purification system is obtained, and according to the real-time hydrogen flow rate, a first switching operation or a second switching operation is executed. Among them, the first switching operation is to close the first regulating valve and open the second regulating valve, and the second switching operation is to open the first regulating valve and close the second regulating valve. In this way, when the real-time hydrogen flow rate is small, the second regulating valve with a smaller flow cross-sectional area is selected to be opened, which can avoid the problem of regulation dead zone in the prior art and further avoid the phenomenon of pressure fluctuation; when the real-time hydrogen flow rate is large, the first regulating valve with a larger flow cross-sectional area is opened, which is more suitable for regulating the situation of a larger hydrogen flow rate. Description of the Drawings

[0077] Figure 1 is a schematic structural diagram of a hydrogen purification system provided by an embodiment of the present application;

[0078] Figure 2 is a schematic flow chart corresponding to a method for switching regulating valves in a hydrogen purification system provided by an embodiment of the present application;

[0079] Figure 3 is a schematic flow chart corresponding to another method for switching regulating valves in a hydrogen purification system provided by an embodiment of the present application;

[0080] Figure 4 is a schematic flow chart corresponding to yet another method for switching regulating valves in a hydrogen purification system provided by an embodiment of the present application;

[0081] Figure 5 is a schematic structural diagram of a device for switching regulating valves in a hydrogen purification system provided by an embodiment of the present application;

[0082] Among them, the appended Figures 1 to 5 reference numerals are explained as follows:

[0083] 100 - Hydrogen purification system; 111 - First drying tower; 112 - Second drying tower; 113 - Third drying tower; 121 - First gas - water separator; 122 - Second gas - water separator; 123 - Third gas - water separator; 124 - Fourth gas - water separator; 125 - Fifth gas - water separator; 131 - First condenser; 132 - Second condenser; 133 - Third condenser; 134 - Fourth condenser; 140 - Deoxygenation tower; 150 - Water collector; 1601 - First valve; 1602 - Second valve; 1603 - Third valve; 1604 - Fourth valve; 1605 - Fifth valve; 1606 - Sixth valve; 1607 - Seventh valve; 1608 - Eighth valve; 1609 - Ninth valve; 1610 - Tenth valve; 1611 - Eleventh valve; 1612 - Twelfth valve; 171 - First regulating valve; 172 - Second regulating valve; 180 - Flowmeter. Detailed implementation manners

[0084] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0085] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above - mentioned drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances for the embodiments of the present application described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non - exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0086] In the present application, the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. is based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit that the indicated devices, elements or components must have a specific orientation or be constructed and operated in a specific orientation.

[0087] The positional relationships such as "parallel" or "perpendicular" not only include the completely "parallel" or "perpendicular" positional relationships, but also include the positional relationships with an angular deviation within a preset deviation range relative to the completely "parallel" or "perpendicular".

[0088] Moreover, in addition to being used to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances.

[0089] In addition, the terms "installed", "set up", "provided with", "connected", "linked", "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there can be internal communication between two devices, components or parts. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0090] It should be noted that, without conflict, the embodiments and the features in the embodiments in this application can be combined with each other. The following will refer to Figures 1 to 5 and will be described in detail with reference to the embodiments.

[0091] For the electrolytic water hydrogen production system, it can be a one-to-one structure where one electrolyzer uses a set of hydrogen purification systems separately, or a multi-to-one structure where multiple electrolyzers share a set of hydrogen purification systems. The load range that the electrolyzers on the market can withstand is generally 40%-110%. That is to say, in the one-to-one structure, the amount of hydrogen that the hydrogen purification system needs to process is generally 40%-110% of the rated value; in the multi-to-one structure, taking 4 electrolyzers as an example, when all 4 electrolyzers operate at the maximum load of 110%, the amount of hydrogen that the hydrogen purification system needs to process is 110% of the rated value. When all 4 electrolyzers operate at the minimum load of 40%, the amount of hydrogen that the hydrogen purification system needs to process is 40% of the rated value. When only 1 electrolyzer operates at the minimum load of 40%, the amount of hydrogen that the hydrogen purification system needs to process is 10% of the rated value.

[0092] When the total amount of gas entering the hydrogen purification system is 20% - 25% of the rated amount, most of the gas will enter the regeneration pipeline, and the remaining small amount of gas will be discharged through the main pipeline. However, when the hydrogen purification system is designed, the regulating valve on the main pipeline is generally designed according to the hydrogen flow rate corresponding to the full-load state. When the gas flow rate through the main pipeline is too small, the regulating valve may be in the dead zone of regulation and unable to adaptively adjust according to the size of the gas flow rate passing through, which may lead to obvious fluctuations in the pressure of the hydrogen purification system.

[0093] Based on the above problems, an embodiment of the present application provides a hydrogen purification system, as Figure 1 shown. The hydrogen purification system 100 includes three drying towers (the first drying tower 111, the second drying tower 112, and the third drying tower 113), five gas-water separators (the first gas-water separator 121, the second gas-water separator 122, the third gas-water separator 123, the fourth gas-water separator 124, and the fifth gas-water separator 125), four condensers (the first condenser 131, the second condenser 132, the third condenser 133, and the fourth condenser 134), a deoxidation tower 140, and a water collector 150.

[0094] Among them, the first end of the first gas-water separator 121 is connected to the gas (such as hydrogen, nitrogen, gas-liquid mixture, etc.) inlet through a pipeline, the second end is connected to the first end of the deoxidation tower 140 through a pipeline, the second end of the deoxidation tower 140 is connected to the first end of the first condenser 131 through a pipeline, the second end of the first condenser 131 is connected to the first end of the second gas-water separator 122 through a pipeline, and the second end of the second gas-water separator 122 is respectively connected to the first end of the third gas-water separator 123, the first end of the fourth gas-water separator 124, and the first end of the fifth gas-water separator 125 through pipelines. The second end of the third gas-water separator 123 is connected to the first end of the second condenser 132 through a pipeline, and the second end of the second condenser 132 is connected to the first end of the first drying tower 111 through a pipeline; the second end of the fourth gas-water separator 124 is connected to the first end of the second condenser 132 through a pipeline, and the second end of the second condenser 132 is connected to the first end of the second drying tower 112 through a pipeline; the second end of the fifth gas-water separator 125 is connected to the first end of the third condenser 133 through a pipeline, and the second end of the third condenser 133 is connected to the first end of the third drying tower 113 through a pipeline. The second ends of the first drying tower 111, the second drying tower 112, and the third drying tower 113 are respectively connected to the gas (such as hydrogen) outlet through the main pipeline and the regeneration pipeline, where the main pipeline and the regeneration pipeline are two parallel pipelines. Any two of the third gas-water separator 123, the fourth gas-water separator 124, and the fifth gas-water separator 125 are connected through a pipeline.

[0095] In addition, the third ends of the second gas-water separator 122, the third gas-water separator 123, the fourth gas-water separator 124, and the fifth gas-water separator 125 can also be connected to the first end of the water collector 150 through pipelines, and the second end of the water collector 150 is connected to the sewage outlet through a pipeline; the first condenser 131, the second condenser 132, the third condenser 133, and the fourth condenser 134 can also be respectively connected to the cooling water inlet / outlet ends.

[0096] To implement the three-tower switching mode, that is, in different working cycles, the working states of the first drying tower 111, the second drying tower 112, and the third drying tower 113 can be switched. A plurality of valves are also provided in the hydrogen purification system 100, and the on / off of each valve is used to realize the switching of the working states of the three drying towers. Specifically, the first valve 1601 is arranged on the pipeline between the second gas-water separator 122 and the third gas-water separator 123; the second valve 1602 is arranged on the common pipeline between the third gas-water separator 123 and the fourth gas-water separator 124 and the fifth gas-water separator 125 respectively; the third valve 1603 is arranged on the pipeline between the second gas-water separator 122 and the fourth gas-water separator 124; the fourth valve 1604 is arranged on the common pipeline between the fourth gas-water separator 124 and the third gas-water separator 123 and the fifth gas-water separator 125 respectively; the fifth valve 1605 is arranged on the pipeline between the second gas-water separator 122 and the fifth gas-water separator 124; the sixth valve 1606 is arranged on the common pipeline between the fifth gas-water separator 125 and the third gas-water separator 123 and the fourth gas-water separator 124 respectively; the seventh valve 1607 is arranged on the regeneration pipeline between the first drying tower 111 and the gas outlet; the eighth valve 1608 is arranged on the main pipeline between the first drying tower 111 and the gas outlet; the ninth valve 1609 is arranged on the regeneration pipeline between the second drying tower 112 and the gas outlet; the tenth valve 1610 is arranged on the main pipeline between the second drying tower 112 and the gas outlet; the eleventh valve 1611 is arranged on the regeneration pipeline between the third drying tower 113 and the gas outlet; the twelfth valve 1612 is arranged on the main pipeline between the third drying tower 113 and the gas outlet.

[0097] In the embodiment of the present application, a first regulating valve 171 and a second regulating valve 172 are arranged in parallel on the main channel, wherein the maximum flow cross-sectional area of the first regulating valve 171 is larger than the maximum flow cross-sectional area of the second regulating valve 172.

[0098] In addition, the hydrogen purification system 100 may further include a flow meter 180, which is installed at the gas outlet and is used to measure the real-time hydrogen flow rate entering the hydrogen purification system.

[0099] It should be noted that Figure 1The hydrogen purification system 100 shown is only an example. Those skilled in the art can adjust or add or delete each device, each pipeline, each valve and various connection methods in the hydrogen purification system 100 according to experience or actual conditions. For example, the number of devices such as drying towers, pipelines or valves can be increased or decreased, and the layout of devices such as drying towers, pipelines or valves or the connection methods between them can be adjusted. The specific details are not limited.

[0100] Based on Figure 1 the shown hydrogen purification system, an embodiment of the present application provides a method for switching a regulating valve in a hydrogen purification system. This method can be applied to the hydrogen purification system 100 described above. As Figure 2 shown, it is a schematic flow chart corresponding to this method, which specifically includes the following steps:

[0101] Step 201, obtain the real-time hydrogen flow rate entering the hydrogen purification system.

[0102] It should be noted that the real-time hydrogen flow rate entering the hydrogen purification system can be measured by a flow meter 180 installed at the gas outlet.

[0103] Step 202, perform a first switching operation or a second switching operation according to the real-time hydrogen flow rate.

[0104] Among them, the first switching operation is to close the first regulating valve and open the second regulating valve; the second switching operation is to open the first regulating valve and close the second regulating valve. Further, the first switching operation can be refined as converting the first regulating valve from the automatic regulation state to the manual regulation state and closing the first regulating valve, that is, setting the valve opening corresponding to the first regulating valve to 0, and at the same time opening the second regulating valve; the second switching operation can be refined as converting the second regulating valve from the automatic regulation state to the manual regulation state and closing the second regulating valve, that is, setting the valve opening corresponding to the second regulating valve to 0, and at the same time opening the first regulating valve.

[0105] Specifically, after obtaining the real-time hydrogen flow rate, whether to perform the first switching operation or the second operation depends on the magnitude of the real-time hydrogen flow rate. That is to say, it can be determined by judging whether the real-time hydrogen flow rate is less than a preset threshold. If the real-time hydrogen flow rate is less than the preset threshold, the first switching operation can be performed, that is, closing the first regulating valve and opening the second regulating valve. Since the maximum flow cross-sectional area of the second regulating valve is smaller than that of the first regulating valve, when the real-time hydrogen flow rate is small, choosing to open the second regulating valve with a smaller flow cross-sectional area can avoid the problem of adjustment dead zone in the prior art, thereby avoiding the phenomenon of pressure fluctuation; if the real-time hydrogen flow rate is greater than or equal to the preset threshold, the second switching operation can be performed, that is, opening the first regulating valve and closing the second regulating valve. At this time, opening the first regulating valve with a larger flow cross-sectional area is more suitable for adjusting the situation of a larger hydrogen flow rate.

[0106] In other possible implementation manners, the average hydrogen flow rate can also be determined according to the real-time hydrogen flow rate, and then the first switching operation or the second switching operation is performed according to the average hydrogen flow rate. Specifically, as Figure 3 shown, it is a schematic flowchart corresponding to another method for switching a regulating valve in a hydrogen purification system provided by an embodiment of the present application, which specifically includes the following steps:

[0107] Step 301, determine the average hydrogen flow rate within a preset time period before the current moment according to the real-time hydrogen flow rate entering the hydrogen purification system.

[0108] Among them, the average hydrogen flow rate can be specifically calculated by the following formula (1):

[0109]

[0110] In formula (1), is the average hydrogen flow rate within a preset time period before the current moment; Q i is the real-time hydrogen flow rate entering the hydrogen purification system at the i-th moment; t is the duration corresponding to the preset time period before the current moment.

[0111] Step 302, judge whether the average hydrogen flow rate is less than or equal to the first preset threshold. If the average hydrogen flow rate is less than or equal to the first preset threshold, execute step 303; otherwise, execute step 304.

[0112] Among them, the first preset threshold can be determined according to the first preset ratio value and the rated hydrogen production amount of the electrolytic cell, and can be specifically determined according to the following formula (2):

[0113]

[0114] In formula (2), Q1 is the first preset threshold; α is the first preset proportional value; M n is the rated hydrogen production of the nth electrolyzer; n is the number of electrolyzers.

[0115] Step 303, perform the first switching operation.

[0116] Step 304, perform the second switching operation.

[0117] Furthermore, if the average hydrogen flow rate is greater than the first preset threshold, the second switching operation is performed. Then, when the hydrogen flow rate fluctuates greatly, it is possible that the average hydrogen flow rate in the next cycle will be less than or equal to the first preset threshold. At this time, according to Figure 3 the shown process, the first switching operation needs to be performed. This operation of frequently switching the on-off states of the first regulating valve and the second regulating valve is likely to cause pressure fluctuations in the hydrogen purification system.

[0118] Based on the above problems, after performing step 302 in this application, when the judgment result is that the average hydrogen flow rate is greater than the first preset threshold, it can be referred to Figure 4 , which is a schematic flow chart corresponding to another method for switching the regulating valve in the hydrogen purification system provided by the embodiments of this application, and specifically includes the following steps:

[0119] Step 401, determine the average hydrogen flow rate within a preset time period before the current moment according to the real-time hydrogen flow rate entering the hydrogen purification system.

[0120] Step 402, determine whether the average hydrogen flow rate is less than or equal to the first preset threshold. If the average hydrogen flow rate is less than or equal to the first preset threshold, perform step 303; otherwise, perform step 304.

[0121] Step 403, perform the first switching operation.

[0122] Step 404, determine whether the average hydrogen flow rate is greater than or equal to the second preset threshold. If the average hydrogen flow rate is greater than or equal to the second preset threshold, perform step 405; otherwise, return to step 401.

[0123] Among them, the first preset threshold is less than the second preset threshold. This application does not specifically limit the magnitude of the difference between the first preset threshold and the second preset threshold, and those skilled in the art can set this difference according to experience and actual situations.

[0124] Specifically, the second preset threshold can be determined according to the second preset proportional value and the rated hydrogen production of the electrolyzer, and can be specifically determined according to the following formula (3):

[0125]

[0126] In formula (3), Q2 is the first preset threshold; β is the second preset ratio value; M n is the rated hydrogen production of the nth electrolytic cell; n is the number of electrolytic cells. Among them, the first preset ratio is less than the second preset ratio, that is, α < γ.

[0127] Step 405, perform the second switching operation.

[0128] In the embodiment of the present application, after performing the first switching operation, the first target valve opening can be determined according to the valve opening of the first regulating valve, the maximum flow cross-sectional area of the first regulating valve, and the maximum flow cross-sectional area of the second regulating valve at the current moment, and then the second regulating valve can be controlled to be adjusted according to the first target valve opening.

[0129] Among them, the first target valve opening is determined by the following formula (4):

[0130]

[0131] In formula (4), k2' is the first target valve opening; k1 is the valve opening of the first regulating valve at the current moment; A1 is the maximum flow cross-sectional area of the first regulating valve; A2 is the maximum flow cross-sectional area of the second regulating valve.

[0132] After performing the second switching operation, the second target valve opening can be determined according to the valve opening of the second regulating valve, the maximum flow cross-sectional area of the first regulating valve, and the maximum flow cross-sectional area of the second regulating valve at the current moment, and then the first regulating valve can be controlled to be adjusted according to the second target valve opening.

[0133] Among them, the second target valve opening is determined by the following formula (5):

[0134]

[0135] In formula (5), k1' is the second target valve opening; k2 is the valve opening of the second regulating valve at the current moment; A1 is the maximum flow cross-sectional area of the first regulating valve; A2 is the maximum flow cross-sectional area of the second regulating valve.

[0136] Furthermore, after determining that the first regulating valve is adjusted according to the second target valve opening, the error value between the actual valve opening of the first regulating valve and the second target valve opening can be detected within a period of time. If the error value is less than or equal to the preset error threshold, the first regulating valve can be set to the automatic adjustment state. If the error value is greater than the preset error threshold, an alarm message can be sent.

[0137] Similarly, after determining that the second regulating valve is adjusted according to the first target valve opening, the error value between the actual valve opening of the second regulating valve and the first target valve opening can also be detected within a period of time. If the error value is less than or equal to the preset error threshold, the second regulating valve can be set to the automatic adjustment state. If the error value is greater than the preset error threshold, an alarm message can be sent.

[0138] Based on the same inventive concept, as Figure 5 shown, an embodiment of the present application also discloses a structural schematic diagram of a switching device for a regulating valve in a hydrogen purification system, which is applied to the hydrogen purification system 100. The hydrogen purification system includes a plurality of drying towers, and each drying tower is respectively connected to the hydrogen outlet end through a main pipeline and a regeneration pipeline. The main pipeline and the regeneration pipeline are two parallel pipelines. A first regulating valve and a second regulating valve are arranged in parallel on the main channel, and the maximum flow cross-sectional area of the first regulating valve is greater than the maximum flow cross-sectional area of the second regulating valve; the device includes:

[0139] An acquisition unit 501, configured to acquire the real-time hydrogen flow rate entering the hydrogen purification system;

[0140] A processing unit 502, configured to perform a first switching operation or a second switching operation according to the real-time hydrogen flow rate;

[0141] Wherein, the first switching operation is to close the first regulating valve and open the second regulating valve; the second switching operation is to open the first regulating valve and close the second regulating valve.

[0142] Optionally, the processing unit 502 is specifically configured to:

[0143] Judge whether the real-time hydrogen flow rate is less than a preset threshold. If the real-time hydrogen flow rate is less than the preset threshold, perform the first switching operation; if the real-time hydrogen flow rate is greater than or equal to the preset threshold, perform the second switching operation.

[0144] Optionally, the processing unit 502 is specifically configured to:

[0145] Determine the average hydrogen flow rate within a preset time period before the current moment according to the real-time hydrogen flow rate entering the hydrogen purification system; and perform the first switching operation or the second switching operation according to the average hydrogen flow rate.

[0146] Optionally, the processing unit 502 is specifically configured to:

[0147] Determine whether the average hydrogen flow rate is less than or equal to a first preset threshold. If the average hydrogen flow rate is less than or equal to the first preset threshold, perform the first switching operation; if the average hydrogen flow rate is greater than the first preset threshold, determine whether the average hydrogen flow rate is greater than or equal to a second preset threshold; if the average hydrogen flow rate is greater than or equal to the second preset threshold, perform the second switching operation;

[0148] Wherein, the first preset threshold is less than the second preset threshold.

[0149] Optionally, the processing unit 502 is further configured to:

[0150] Determine a first target valve opening according to the valve opening of the first regulating valve, the maximum flow cross-sectional area of the first regulating valve, and the maximum flow cross-sectional area of the second regulating valve at the current moment; and control the second regulating valve to adjust according to the first target valve opening.

[0151] Optionally, the first target valve opening is determined by the following method:

[0152]

[0153] Wherein, k2' is the first target valve opening; k1 is the valve opening of the first regulating valve at the current moment; A1 is the maximum flow cross-sectional area of the first regulating valve; A2 is the maximum flow cross-sectional area of the second regulating valve.

[0154] Optionally, the processing unit 502 is further configured to:

[0155] Determine a second target valve opening according to the valve opening of the second regulating valve, the maximum flow cross-sectional area of the first regulating valve, and the maximum flow cross-sectional area of the second regulating valve at the current moment; and control the first regulating valve to adjust according to the second target valve opening.

[0156] Optionally, the second target valve opening is determined by the following method:

[0157]

[0158] Wherein, k1' is the second target valve opening; k2 is the valve opening of the second regulating valve at the current moment; A1 is the maximum flow cross-sectional area of the first regulating valve; A2 is the maximum flow cross-sectional area of the second regulating valve.

[0159] Based on the same inventive concept, the present application also discloses a hydrogen purification system. The hydrogen purification system includes a plurality of drying towers. Each drying tower is respectively connected to the hydrogen outlet end through a main pipeline and a regeneration pipeline. The main pipeline and the regeneration pipeline are two parallel pipelines. A first regulating valve and a second regulating valve are arranged in parallel on the main channel. The maximum flow cross-sectional area of the first regulating valve is larger than the maximum flow cross-sectional area of the second regulating valve. The hydrogen purification system further includes:

[0160] A flowmeter configured to obtain the real-time hydrogen flow rate entering the hydrogen purification system;

[0161] A controller configured to perform a first switching operation or a second switching operation according to the real-time hydrogen flow rate;

[0162] Wherein, the first switching operation is to close the first regulating valve and open the second regulating valve; the second switching operation is to open the first regulating valve and close the second regulating valve.

[0163] Optionally, the controller is specifically configured to:

[0164] Judge whether the real-time hydrogen flow rate is less than a preset threshold. If the real-time hydrogen flow rate is less than the preset threshold, perform the first switching operation; if the real-time hydrogen flow rate is greater than or equal to the preset threshold, perform the second switching operation.

[0165] Optionally, the controller is specifically configured to:

[0166] Determine the average hydrogen flow rate within a preset time period before the current moment according to the real-time hydrogen flow rate entering the hydrogen purification system; and perform the first switching operation or the second switching operation according to the average hydrogen flow rate.

[0167] Optionally, the controller is specifically configured to:

[0168] Judge whether the average hydrogen flow rate is less than or equal to a first preset threshold. If the average hydrogen flow rate is less than or equal to the first preset threshold, perform the first switching operation; if the average hydrogen flow rate is greater than the first preset threshold, judge whether the average hydrogen flow rate is greater than or equal to a second preset threshold; if the average hydrogen flow rate is greater than or equal to the second preset threshold, perform the second switching operation;

[0169] Wherein, the first preset threshold is less than the second preset threshold.

[0170] Optionally, the controller is further configured to:

[0171] Determine a first target valve opening degree according to the valve opening degree of the first regulating valve, the maximum flow cross-sectional area of the first regulating valve, and the maximum flow cross-sectional area of the second regulating valve at the current moment; and control the second regulating valve to adjust according to the first target valve opening degree.

[0172] Optionally, the first target valve opening degree is determined by the following method:

[0173]

[0174] Wherein, k2' is the first target valve opening degree; k1 is the valve opening degree of the first regulating valve at the current moment; A1 is the maximum flow cross-sectional area of the first regulating valve; A2 is the maximum flow cross-sectional area of the second regulating valve.

[0175] Optionally, the controller is further configured to:

[0176] Determine a second target valve opening degree according to the valve opening degree of the second regulating valve, the maximum flow cross-sectional area of the first regulating valve, and the maximum flow cross-sectional area of the second regulating valve at the current moment; and control the first regulating valve to adjust according to the second target valve opening degree.

[0177] Optionally, the second target valve opening degree is determined by the following method:

[0178]

[0179] Wherein, k1' is the second target valve opening degree; k2 is the valve opening degree of the second regulating valve at the current moment; A1 is the maximum flow cross-sectional area of the first regulating valve; A2 is the maximum flow cross-sectional area of the second regulating valve.

[0180] Based on the same inventive concept, an embodiment of the present application also discloses a terminal device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the method described above is implemented.

[0181] Based on the same inventive concept, an embodiment of the present application also discloses a computer-readable storage medium. The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method described above is implemented.

[0182] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. The systems, devices, modules, or units described in the above embodiments can be specifically implemented by computer chips or entities, or by products with certain functions. A typical implementation device is a computer device. Specifically, the computer device can be, for example, a personal computer, a laptop computer, a cellular phone, a camera phone, a smart phone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.

[0183] In a typical example, the computer device specifically includes a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, it implements the method executed by the client as described above, or when the processor executes the program, it implements the method executed by the server as described above.

[0184] The computer device includes a central processing unit (CPU), which can perform various appropriate operations and processes according to the program stored in the read-only memory (ROM) or the program loaded from the storage part into the random access memory (RAM). In the RAM, various programs and data required for system operations are also stored. The CPU, ROM, and RAM are connected to each other via a bus. The input / output (I / O) interface is also connected to the bus.

[0185] The following components are connected to the I / O interface: an input part including a keyboard, a mouse, etc.; an output part including, for example, a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker, etc.; a storage part including a hard disk, etc.; and a communication part including a network interface card such as a LAN card, a modem, etc. The communication part performs communication processing via a network such as the Internet. A drive is also connected to the I / O interface as needed. Removable media, such as magnetic disks, optical disks, magneto-optical disks, semiconductor memories, etc., are installed on the drive as needed so that the computer programs read from them can be installed into the storage part as needed.

[0186] Specifically, according to the embodiments of the present application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, the embodiments of the present application include a computer program product, which includes a computer program tangibly contained on a machine-readable medium, and the computer program includes program codes for executing the methods shown in the flowcharts. In such an embodiment, the computer program can be downloaded and installed from the network through the communication part, and / or installed from the removable media.

[0187] A computer-readable medium includes both permanent and non-permanent, removable and non-removable media and can implement information storage by any method or technology. The information can be computer-readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassette tapes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that can be used to store information accessible by a computing device. As defined herein, a computer-readable medium does not include transitory computer-readable media, such as modulated data signals and carrier waves.

[0188] For convenience of description, when describing the above devices, they are described as various units according to their functions. Of course, when implementing the present application, the functions of each unit can be implemented in the same or multiple software and / or hardware.

[0189] This application is described with reference to the flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present application. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing devices generate means for implementing the functions specified in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0190] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, such that the instructions stored in the computer-readable memory generate a manufactured article including instruction means that implement the functions specified in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0191] These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process. Thus, the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one process or multiple processes and / or one block or multiple blocks. Figure 1 one process or multiple processes and / or Figure 1 blocks or multiple blocks.

[0192] It should also be noted that the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, commodity or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, commodity or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, commodity or device comprising the element.

[0193] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system or a computer program product. Therefore, the present application can take the form of a complete hardware embodiment, a complete software embodiment or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0194] The present application can be described in the general context of computer-executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform specific tasks or implement specific abstract data types. The present application can also be practiced in a distributed computing environment where tasks are performed by remote processing devices connected through a communication network. In a distributed computing environment, program modules can be located in local and remote computer storage media including storage devices.

[0195] Each embodiment in this specification is described in a progressive manner. The same or similar parts among the embodiments can be referred to each other, and the key point of each embodiment is to illustrate the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method embodiment.

[0196] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims

1. A method for switching a regulating valve in a hydrogen purification system, characterized in that, The hydrogen purification system includes multiple drying towers, each drying tower is connected to the hydrogen outlet end through a main pipeline and a regeneration pipeline respectively. The main pipeline and the regeneration pipeline are two parallel pipelines. A first regulating valve and a second regulating valve are arranged in parallel on the main channel. The maximum flow cross-sectional area of the first regulating valve is larger than the maximum flow cross-sectional area of the second regulating valve; The method includes: Obtain the real-time hydrogen flow rate entering the hydrogen purification system; Perform a first switching operation or a second switching operation according to the real-time hydrogen flow rate; Wherein, the first switching operation is to close the first regulating valve and open the second regulating valve; The second switching operation is to open the first regulating valve and close the second regulating valve.

2. The method according to claim 1, characterized in that, Performing a first switching operation or a second switching operation according to the real-time hydrogen flow rate includes: Judge whether the real-time hydrogen flow rate is less than a preset threshold. If the real-time hydrogen flow rate is less than the preset threshold, perform the first switching operation; If the real-time hydrogen flow rate is greater than or equal to the preset threshold, perform the second switching operation.

3. The method according to claim 1, wherein Performing a first switching operation or a second switching operation according to the real-time hydrogen flow rate includes: Determine the average hydrogen flow rate within a preset time period before the current moment according to the real-time hydrogen flow rate entering the hydrogen purification system; Perform the first switching operation or the second switching operation according to the average hydrogen flow rate.

4. The method according to claim 3, wherein Performing a first switching operation or a second switching operation according to the average hydrogen flow rate includes: Judge whether the average hydrogen flow rate is less than or equal to a first preset threshold. If the average hydrogen flow rate is less than or equal to the first preset threshold, perform the first switching operation; If the average hydrogen flow rate is greater than the first preset threshold, judge whether the average hydrogen flow rate is greater than or equal to a second preset threshold; If the average hydrogen flow rate is greater than or equal to the second preset threshold, perform the second switching operation; Wherein, the first preset threshold is less than the second preset threshold.

5. The method according to claim 4, characterized in that After performing the first switching operation, the method further includes: Determine a first target valve opening according to the valve opening of the first regulating valve at the current moment, the maximum flow cross-sectional area of the first regulating valve, and the maximum flow cross-sectional area of the second regulating valve; Control the second regulating valve to adjust according to the first target valve opening.

6. The method according to claim 5, characterized in that, The first target valve opening is determined by the following method: Wherein, k2' is the first target valve opening; k1 is the valve opening of the first regulating valve at the current moment; A1 is the maximum flow cross-sectional area of the first regulating valve; A2 is the maximum flow cross-sectional area of the second regulating valve.

7. The method according to claim 4, characterized in that, After performing the second switching operation, the method further includes: Determine a second target valve opening according to the valve opening of the second regulating valve at the current moment, the maximum flow cross-sectional area of the first regulating valve, and the maximum flow cross-sectional area of the second regulating valve; Control the first regulating valve to adjust according to the second target valve opening.

8. The method according to claim 7, wherein The second target valve opening is determined by the following method: Among them, k1' is the opening degree of the second target valve; k2 is the opening degree of the second regulating valve at the current moment; A1 is the maximum flow cross-sectional area of the first regulating valve; A2 is the maximum flow cross-sectional area of the second regulating valve.

9. A switching device for a regulating valve in a hydrogen purification system, characterized in that, The hydrogen purification system includes a plurality of drying towers, and each drying tower is respectively connected to the hydrogen outlet end through a main pipeline and a regeneration pipeline. The main pipeline and the regeneration pipeline are two parallel pipelines. A first regulating valve and a second regulating valve are arranged in parallel on the main channel, and the maximum flow cross-sectional area of the first regulating valve is larger than that of the second regulating valve; the device includes: An acquisition unit, configured to acquire the real-time hydrogen flow rate entering the hydrogen purification system; A processing unit, configured to perform a first switching operation or a second switching operation according to the real-time hydrogen flow rate; Among them, the first switching operation is to close the first regulating valve and open the second regulating valve; the second switching operation is to open the first regulating valve and close the second regulating valve.

10. A hydrogen purification system, characterized in that, The hydrogen purification system includes a plurality of drying towers, and each drying tower is respectively connected to the hydrogen outlet end through a main pipeline and a regeneration pipeline. The main pipeline and the regeneration pipeline are two parallel pipelines. A first regulating valve and a second regulating valve are arranged in parallel on the main channel, and the maximum flow cross-sectional area of the first regulating valve is larger than that of the second regulating valve; The hydrogen purification further includes: A flowmeter, configured to acquire the real-time hydrogen flow rate entering the hydrogen purification system; A controller, configured to perform a first switching operation or a second switching operation according to the real-time hydrogen flow rate; Among them, the first switching operation is to close the first regulating valve and open the second regulating valve; the second switching operation is to open the first regulating valve and close the second regulating valve.

11. A terminal device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, the method described in any one of claims 1 to 8 is implemented.

12. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, the method described in any one of claims 1 to 8 is implemented.

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