Method and device for switching working states of drying tower in hydrogen purification system and hydrogen purification system

Abstract

The invention provides a switching method and device for the working state of a drying tower in a hydrogen purification system and the hydrogen purification system.According to the switching method for a regeneration drying tower in the hydrogen purification system, the actual hydrogen treatment amount of a main drying tower is determined according to the real-time hydrogen flow and the preset working period duration, and the actual hydrogen treatment amount of the main drying tower is determined according to the real-time hydrogen flow and the preset working period duration; if the actual hydrogen treatment capacity is larger than or equal to the preset theoretical hydrogen treatment capacity, the main drying tower and the regeneration drying tower are controlled to conduct state switching. Thus, the method better conforms to the actual working condition of a hydrogen purification system, the problems that due to too early switching, a molecular sieve in the regeneration drying tower is incomplete in desorption or insufficient in cooling, and a molecular sieve in the main drying tower is incomplete in adsorption can be effectively solved, and the problems that due to too late switching, energy of the regeneration drying tower is wasted, and the service life of the regeneration drying tower is prolonged are solved. The adsorption of the molecular sieve in the main drying tower is supersaturated.

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 the working state of a drying tower 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 to dry the hydrogen at the outlet of the regeneration drying tower.

[0003] In the hydrogen purification system 100, it is particularly important to reasonably determine the switching timing of the working state of the drying tower. Premature switching easily leads to incomplete desorption or insufficient cooling of the molecular sieve in the regeneration drying tower, and incomplete adsorption of the molecular sieve in the main drying tower; late switching easily leads to energy waste in the regeneration drying tower and the problem of oversaturation of the molecular sieve adsorption in the main drying tower. Summary of the Invention

[0004] One object of the present application is to provide a method for switching the working state of a drying tower in a hydrogen purification system, which solves the problems that premature switching of the working state of the existing hydrogen purification system's drying tower easily leads to incomplete desorption or insufficient cooling of the molecular sieve in the regeneration drying tower, and incomplete adsorption of the molecular sieve in the main drying tower; late switching of the working state of the drying tower easily leads to energy waste in the regeneration drying tower and the problem of oversaturation of the molecular sieve adsorption in the main drying tower. Another object of the present application is to provide a device for switching the working state of a drying tower 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 objects, the first aspect of the present application discloses a method for switching the working state of a drying tower in a hydrogen purification system. The method is applied to a hydrogen purification system, and the hydrogen purification system includes a main drying tower in the main working state and a regeneration drying tower in the regeneration state. The method includes:

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

[0007] Determine the actual hydrogen processing capacity of the main drying tower according to the real-time hydrogen flow rate and the preset working cycle duration;

[0008] Determine whether the actual hydrogen processing amount is greater than or equal to the preset theoretical hydrogen processing amount. If the actual hydrogen processing amount is greater than or equal to the preset theoretical hydrogen processing amount, control the main drying tower and the regeneration drying tower to perform a status switch.

[0009] Optionally, the method further includes:

[0010] If the actual hydrogen processing amount is less than the preset theoretical hydrogen processing amount, obtain the current working duration of the regeneration drying tower;

[0011] Determine whether the current working duration of the regeneration drying tower reaches the preset working cycle duration. If the current working duration of the regeneration drying tower reaches the preset working cycle duration, control the main drying tower and the regeneration drying tower to perform a status switch.

[0012] Optionally, the preset working cycle duration includes a preset heating working duration and a preset cold blow working duration; the current working duration of the regeneration drying tower includes the current heating working duration and the current cold blow working duration of the regeneration drying tower;

[0013] Determine whether the current working duration of the regeneration drying tower reaches the preset working cycle duration. If the current working duration of the regeneration drying tower reaches the preset working cycle duration, control the main drying tower and the regeneration drying tower to perform a status switch, including:

[0014] Determine whether the current cold blow working duration of the regeneration drying tower reaches the preset cold blow working duration. If the current cold blow working duration of the regeneration drying tower reaches the preset cold blow working duration, control the main drying tower and the regeneration drying tower to perform a status switch.

[0015] Optionally, the method further includes:

[0016] If the actual hydrogen processing amount is less than the preset theoretical hydrogen processing amount, determine whether the actual hydrogen processing amount is greater than the hydrogen processing amount to be processed in the heating stage;

[0017] If the actual hydrogen processing amount is greater than the hydrogen processing amount to be processed in the heating stage, increase the intake air volume of the regeneration drying tower;

[0018] Wherein, the hydrogen processing amount to be processed in the heating stage is determined according to the preset theoretical hydrogen processing amount, the preset working cycle duration and the preset heating stage working duration.

[0019] Optionally, the hydrogen processing amount to be processed in the heating stage is determined by the following method:

[0020]

[0021] Wherein, m'1 is the hydrogen treatment amount to be processed in the heating stage; m is the preset theoretical hydrogen treatment amount; t is the preset working cycle duration; t1 is the preset working duration of the heating stage.

[0022] Optionally, the actual hydrogen treatment amount of the main drying tower is determined by the following method:

[0023]

[0024] Wherein, m i is the actual hydrogen treatment amount of the main drying tower; t is the preset working cycle duration; is the real-time hydrogen flow rate;

[0025] The preset theoretical hydrogen treatment amount is determined by the following method:

[0026] m = 1.1 × Q × t

[0027] Wherein, m is the preset theoretical hydrogen treatment amount; t is the preset working cycle duration; Q is the total hydrogen production amount of all electrolyzers.

[0028] Optionally, the hydrogen purification system further includes a secondary drying tower in a secondary working state;

[0029] Controlling the state switching between the main drying tower and the regeneration drying tower includes:

[0030] Controlling the state switching among the main drying tower, the secondary drying tower and the regeneration drying tower.

[0031] Optionally, before determining the actual hydrogen treatment amount of the main drying tower, the method further includes:

[0032] Determining the working state of the regeneration drying tower;

[0033] If the working state of the regeneration drying tower is the cold blow state, then execute the subsequent steps.

[0034] In a second aspect, the present application also discloses a switching device for the working state of a drying tower in a hydrogen purification system. The hydrogen purification system includes a main drying tower in a main working state and a regeneration drying tower in a regeneration state; the device includes:

[0035] An acquisition unit, configured to acquire the real-time hydrogen flow rate entering the hydrogen purification system at the current moment;

[0036] A processing unit, configured to determine the actual hydrogen treatment amount of the main drying tower according to the real-time hydrogen flow rate and the preset working cycle duration;

[0037] A control unit, configured to determine whether the actual hydrogen processing amount is greater than or equal to a preset theoretical hydrogen processing amount. If the actual hydrogen processing amount is greater than or equal to the preset theoretical hydrogen processing amount, it controls the main drying tower and the regeneration drying tower to perform a status switch.

[0038] Optionally, the obtaining unit is further configured to:

[0039] If the actual hydrogen processing amount is less than the preset theoretical hydrogen processing amount, obtain the current working duration of the regeneration drying tower;

[0040] The control unit is further configured to:

[0041] Determine whether the current working duration of the regeneration drying tower reaches a preset working cycle duration. If the current working duration of the regeneration drying tower reaches the preset working cycle duration, control the main drying tower and the regeneration drying tower to perform a status switch.

[0042] Optionally, the preset working cycle duration includes a preset heating working duration and a preset cold blow working duration; the current working duration of the regeneration drying tower includes the current heating working duration and the current cold blow working duration of the regeneration drying tower;

[0043] The control unit is specifically configured to:

[0044] Determine whether the current cold blow working duration of the regeneration drying tower reaches the preset cold blow working duration. If the current cold blow working duration of the regeneration drying tower reaches the preset cold blow working duration, control the main drying tower and the regeneration drying tower to perform a status switch.

[0045] Optionally, the control unit is further configured to:

[0046] If the actual hydrogen processing amount is less than the preset theoretical hydrogen processing amount, determine whether the actual hydrogen processing amount is greater than the hydrogen processing amount to be handled in the heating stage. If the actual hydrogen processing amount is greater than the hydrogen processing amount to be handled in the heating stage, increase the intake air volume of the regeneration drying tower;

[0047] Wherein, the hydrogen processing amount to be handled in the heating stage is determined according to the preset theoretical hydrogen processing amount, the preset working cycle duration, and the preset heating stage working duration.

[0048] Optionally, the hydrogen processing amount to be handled at the current moment is determined by the following method:

[0049]

[0050] Among them, m'1 is the hydrogen treatment amount to be processed in the heating stage; m is the preset theoretical hydrogen treatment amount; t is the preset working cycle duration; t1 is the preset working duration of the heating stage.

[0051] Optionally, the actual hydrogen treatment amount of the main drying tower is determined by the following method:

[0052]

[0053] Among them, m i is the actual hydrogen treatment amount of the main drying tower; t is the preset working cycle duration; is the real-time hydrogen flow rate;

[0054] The preset theoretical hydrogen treatment amount is determined by the following method:

[0055] m = 1.1 × P × t

[0056] Among them, m is the preset theoretical hydrogen treatment amount; t is the preset working cycle duration; P is the total hydrogen production of all electrolytic cells.

[0057] Optionally, the hydrogen purification system further includes a secondary drying tower in a secondary working state;

[0058] The control unit is specifically configured to:

[0059] Control the main drying tower, the secondary drying tower, and the regeneration drying tower to perform state switching.

[0060] Optionally, the processing unit is further configured to:

[0061] Determine the working state of the regeneration drying tower;

[0062] If the working state of the regeneration drying tower is the cold blow state, then perform subsequent steps.

[0063] In a third aspect, the present application also discloses a hydrogen purification system, the hydrogen purification system includes a main drying tower in a main working state, a regeneration drying tower in a regeneration state, a flow meter, and a controller; the flow meter is configured to:

[0064] Obtain the real-time hydrogen flow rate entering the hydrogen purification system at the current moment;

[0065] The controller is configured to:

[0066] Determine the actual hydrogen processing capacity of the main drying tower according to the real-time hydrogen flow rate and the preset working cycle duration; judge whether the actual hydrogen processing capacity is greater than or equal to the preset theoretical hydrogen processing capacity. If the actual hydrogen processing capacity is greater than or equal to the preset theoretical hydrogen processing capacity, control the main drying tower and the regeneration drying tower to perform a status switch.

[0067] Optionally, the hydrogen purification system further includes a timer; the timer is configured to:

[0068] If the actual hydrogen processing capacity is less than the preset theoretical hydrogen processing capacity, obtain the current working duration of the regeneration drying tower;

[0069] The controller is further configured to:

[0070] Judge whether the current working duration of the regeneration drying tower reaches the preset working cycle duration. If the current working duration of the regeneration drying tower reaches the preset working cycle duration, control the main drying tower and the regeneration drying tower to perform a status switch.

[0071] Optionally, the preset working cycle duration includes a preset heating working duration and a preset cold blow working duration; the current working duration of the regeneration drying tower includes the current heating working duration and the current cold blow working duration of the regeneration drying tower;

[0072] The controller is specifically configured to:

[0073] Judge whether the current cold blow working duration of the regeneration drying tower reaches the preset cold blow working duration. If the current cold blow working duration of the regeneration drying tower reaches the preset cold blow working duration, control the main drying tower and the regeneration drying tower to perform a status switch.

[0074] Optionally, the controller is further configured to:

[0075] If the actual hydrogen processing capacity is less than the preset theoretical hydrogen processing capacity, judge whether the actual hydrogen processing capacity is greater than the hydrogen processing capacity required in the heating stage. If the actual hydrogen processing capacity is greater than the hydrogen processing capacity required in the heating stage, increase the intake air volume of the regeneration drying tower;

[0076] Wherein, the hydrogen processing capacity required in the heating stage is determined according to the preset theoretical hydrogen processing capacity, the preset working cycle duration, and the preset heating stage working duration.

[0077] Optionally, the hydrogen processing capacity required in the heating stage is determined by the following method:

[0078]

[0079] Among them, m'1 is the hydrogen treatment amount to be processed in the heating stage; m is the preset theoretical hydrogen treatment amount; t is the preset working cycle duration; t1 is the preset working duration of the heating stage.

[0080] Optionally, the actual hydrogen treatment amount of the main drying tower is determined by the following method:

[0081]

[0082] Among them, m i is the actual hydrogen treatment amount of the main drying tower; t is the preset working cycle duration; is the real-time hydrogen flow rate;

[0083] The preset theoretical hydrogen treatment amount is determined by the following method:

[0084] m = 1.1 × P × t

[0085] Among them, m is the preset theoretical hydrogen treatment amount; t is the preset working cycle duration; P is the total hydrogen production amount of all electrolyzers.

[0086] Optionally, the hydrogen purification system further includes a secondary drying tower in a secondary working state;

[0087] The controller is specifically configured to:

[0088] Control the main drying tower, the secondary drying tower, and the regeneration drying tower to perform state switching.

[0089] Optionally, the controller is further configured to:

[0090] Determine the working state of the regeneration drying tower;

[0091] If the working state of the regeneration drying tower is the cold blow state, then execute the subsequent steps.

[0092] In a fourth aspect, the present application further discloses a terminal device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where when the processor executes the computer program, the method as described above is implemented.

[0093] In a fifth aspect, the present application further discloses a computer-readable storage medium, where the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method as described above is implemented.

[0094] Compared with the prior art, in the method for switching the regeneration drying tower in the hydrogen purification system provided by the present application, the actual hydrogen processing capacity of the main drying tower is determined according to the real-time hydrogen flow rate and the preset working cycle duration. If the actual hydrogen processing capacity is greater than or equal to the preset theoretical hydrogen processing capacity, the main drying tower and the regeneration drying tower are controlled to switch states. In the present application, the switching timing of the working states of each drying tower is determined by comparing the actual hydrogen processing capacity and the preset theoretical hydrogen processing capacity. Compared with the method of switching the working state of the drying tower according to a fixed duration in the prior art, the method provided by the present application is more in line with the actual working conditions of the hydrogen purification system, and can effectively avoid the problems that premature switching is likely to cause incomplete desorption or insufficient cooling of the molecular sieve in the regeneration drying tower, and incomplete adsorption of the molecular sieve in the main drying tower, as well as avoid the problems that late switching is likely to cause energy waste in the regeneration drying tower and supersaturation of the molecular sieve adsorption in the main drying tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0095] Figure 1 FIG. 6 is a schematic structural diagram of a hydrogen purification system provided by an embodiment of the present application;

[0096] Figure 2 FIG. 10 is a schematic flow chart corresponding to a control method for a regeneration drying tower in a hydrogen purification system provided by an embodiment of the present application;

[0097] Figure 3 FIG. 14 is a schematic structural diagram of a switching device for the working state of a drying tower in a hydrogen purification system provided by an embodiment of the present application;

[0098] Among them, the Figures 1 to 3 description of the reference numerals in the drawings is as follows:

[0099] 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 - deoxidation 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. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0100] 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 in the present application without creative efforts shall fall within the protection scope of the present application.

[0101] 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.

[0102] 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.

[0103] Position relationships such as "parallel" or "perpendicular" not only include the completely "parallel" or "perpendicular" position relationships, but also include position relationships with an angular deviation within a preset deviation range relative to the completely "parallel" or "perpendicular" ones.

[0104] Moreover, in addition to being able to represent an 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 the present application can be understood according to specific circumstances.

[0105] In addition, the terms "mounted", "arranged", "provided with", "connected", "coupled", "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 also be internal communication between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0106] It should be noted that, without conflict, the embodiments and features in the embodiments of this application can be combined with each other. The following will refer to Figures 1 to 3 and describe this application in detail in combination with the embodiments.

[0107] For an electrolytic water hydrogen production system, it can be a one-to-one structure where one electrolytic cell uses a set of hydrogen purification systems alone, or a multi-to-one structure where multiple electrolytic cells share a set of hydrogen purification systems. The load range that the electrolytic cells 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 electrolytic cells as an example, when all 4 electrolytic cells operate at the highest load of 110%, the amount of hydrogen that the hydrogen purification system needs to process is 110% of the rated value. When all 4 electrolytic cells operate at the lowest load of 40%, the amount of hydrogen that the hydrogen purification system needs to process is 40% of the rated value. When only 1 electrolytic cell operates and operates at the lowest load of 40%, the amount of hydrogen that the hydrogen purification system needs to process is 10% of the rated value.

[0108] At present, there are two working modes for the mainstream hydrogen purification systems on the market. One is the two-tower switching mode, that is, the hydrogen purification system includes two drying towers. One drying tower is used for hydrogen drying and is in the main working state, called the main drying tower, and the other drying tower is used for the regeneration of the molecular sieve in the tower and is in the regeneration state, called the regeneration drying tower; the other is the three-tower switching mode, that is, the hydrogen purification system includes three drying towers. The first drying tower is used for hydrogen drying and is in the main working state, called the main drying tower. The second drying tower is used for the regeneration of the molecular sieve in the tower and is in the regeneration working state, called the regeneration drying tower. The third drying tower is used for drying the hydrogen coming out of the regeneration drying tower and is in the secondary working state, called the secondary drying tower. Currently, the three-tower switching mode is the working mode of the mainstream hydrogen purification system.

[0109] The following takes the three-tower switching mode as an example and combines with Figure 1 the structural schematic diagram of the hydrogen purification system shown to describe in detail the hydrogen purification system and its working mode in the embodiments of this application.

[0110] 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 respectively), 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 respectively), four condensers (the first condenser 131, the second condenser 132, the third condenser 133, and the fourth condenser 134 respectively), a deoxidation tower 140, and a water collector 150.

[0111] 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 ends of the third gas-water separator 123, the fourth steam-water separator 124, and 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 a main pipeline and a 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.

[0112] 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 a pipeline, 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.

[0113] To achieve 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. In the hydrogen purification system 100, a plurality of valves are also provided. By opening and closing each valve, the switching of the working states of the three drying towers is achieved. 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.

[0114] It should be noted that Figure 1 The 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 situations. For example, increase or decrease the number of devices such as drying towers, pipelines, or valves, adjust the layout of devices such as drying towers, pipelines, or valves, or the connection methods between them. The specific details are not limited.

[0115] Take Figure 1Taking the shown hydrogen purification system 100 as an example, if the first valve 1601, the fourth valve 1604, the sixth valve 1606, the eighth valve 1608, the tenth valve 1610 and the eleventh valve 1611 are controlled to be in the open state, and the second valve 1602, the third valve 1603, the fifth valve 1605, the seventh valve 1607, the ninth valve 1609 and the twelfth valve 1612 are in the closed state, then at this time, the first drying tower 111 is in the main working state as the main drying tower, the second drying tower 112 is in the regeneration working state as the regeneration drying tower, and the third drying tower 113 is in the secondary working state as the secondary drying tower. After the gas (such as hydrogen, nitrogen, gas-liquid mixture, etc.) enters the hydrogen purification system 100 from the gas inlet, there are two gas flow paths:

[0116] Path 1: The first gas-water separator 121 → the deoxidation tower 140 → the first condenser 131 → the second gas-water separator 122 → the third gas-water separator 123 → the second condenser 132 → the first drying tower 111 → the gas outlet.

[0117] Path 2: The first drying tower 111 → the second drying tower 112 → the third condenser 133 → the fourth gas-water separator 124 → the fifth gas-water separator 125 → the fourth condenser 134 → the third drying tower 113 → the gas outlet.

[0118] Specifically, the gas enters the first gas-water separator 121, undergoes gas-liquid separation treatment and then enters the deoxidation tower 140, undergoes deoxidation treatment and then enters the first condenser 132, undergoes heat exchange treatment and then enters the second gas-water separator 122, undergoes gas-liquid separation treatment and then enters the third gas-water separator 123, undergoes gas-liquid separation treatment again and then enters the second condenser 132, undergoes heat exchange treatment and then enters the first drying tower 111, undergoes drying treatment and is discharged. Most of the gas discharged from the first drying tower 111 is discharged from the main pipeline, and a small part enters the regeneration pipeline.

[0119] The gas coming out of the first drying tower 111 enters the second drying tower 112 through the regeneration pipeline, undergoes drying treatment and then enters the third condenser 133, undergoes heat exchange treatment and then enters the fourth gas-water separator 124, undergoes gas-liquid separation treatment and then enters the fifth gas-water separator 125, undergoes gas-liquid separation treatment again and then enters the fourth condenser 134, undergoes heat exchange treatment and then enters the third drying tower 113, undergoes drying treatment and is discharged from the regeneration pipeline (or enters the second drying tower 112 again for circulation).

[0120] If the second valve 1602, the fourth valve 1604, the fifth valve 1605, the eighth valve 1608, the ninth valve 1609 and the twelfth valve 1612 are controlled to be in the open state, and the first valve 1601, the third valve 1603, the sixth valve 1606, the seventh valve 1607, the tenth valve 1610 and the eleventh valve 1611 are in the closed state, then at this time, the first drying tower 111 is in the regeneration working state as the regeneration drying tower, the second drying tower 112 is in the secondary working state as the secondary drying tower, and the third drying tower 113 is in the main working state as the main drying tower. After the gas (such as hydrogen, nitrogen, gas-liquid mixture, etc.) enters the hydrogen purification system 100 from the gas inlet, there are also two gas flow paths:

[0121] Path three: the first gas-water separator 121 → the deoxidation tower 140 → the first condenser 131 → the second gas-water separator 122 → the fifth gas-water separator 125 → the fourth condenser 134 → the third drying tower 113 → the gas outlet.

[0122] Path four: the third drying tower 113 → the first drying tower 111 → the second condenser 132 → the third gas-water separator 123 → the fourth gas-water separator 124 → the third condenser 133 → the second drying tower 112 → the gas outlet.

[0123] The specific working process can refer to the working process when the first drying tower 111 is the main drying tower, the second drying tower 112 is the regeneration drying tower, and the third drying tower 113 is the secondary drying tower in the above text for adaptive adjustment, which will not be elaborated here.

[0124] If the second valve 1602, the third valve 1603, the sixth valve 1606, the seventh valve 1607, the tenth valve 1610 and the twelfth valve 1612 are controlled to be in the open state, and the first valve 1601, the fourth valve 1604, the fifth valve 1605, the eighth valve 1608, the ninth valve 1609 and the eleventh valve 1611 are in the closed state, then at this time, the first drying tower 111 is in the secondary working state as the secondary drying tower, the second drying tower 112 is in the main working state as the main drying tower, and the third drying tower 113 is in the regeneration working state as the regeneration drying tower. After the gas (such as hydrogen, nitrogen, gas-liquid mixture, etc.) enters the hydrogen purification system 100 from the gas inlet, there are also two gas flow paths:

[0125] Path five: the first gas-water separator 121 → the deoxidation tower 140 → the first condenser 131 → the second gas-water separator 122 → the fourth gas-water separator 124 → the third condenser 133 → the second drying tower 112 → the gas outlet.

[0126] Path six: The second drying tower 112 → the third drying tower 113 → the fourth condenser 134 → the fifth gas-water separator 125 → the third gas-water separator 123 → the second condenser 132 → the first drying tower 111 → the gas outlet.

[0127] For the specific working process, reference can be made to the working process when the first drying tower 111 is used as the main drying tower, the second drying tower 112 is used as the regeneration drying tower, and the third drying tower 113 is used as the secondary drying tower above, and adaptive adjustments are made, which will not be elaborated here.

[0128] In the above working process, both the main drying tower in the main working state and the secondary drying tower in the secondary working state rely on the molecular sieve in the tower to dry the gas, and the regeneration drying tower in the regeneration working state needs to carry out the regeneration treatment of the molecular sieve in the tower. Among them, the regeneration drying tower includes two stages, namely the heating stage and the cold blow stage, in a working cycle. In the heating stage, the gas entering the regeneration drying tower is heated by the heating wire inside the regeneration drying tower, and then the moisture inside the molecular sieve is carried out by the high-temperature gas. When the regeneration drying tower is completely desorbed (that is, all the moisture inside the molecular sieve is carried out), it enters the cold blow stage; in the cold blow stage, the heating wire inside the regeneration drying tower stops heating, and the temperature is reduced by continuously introducing gas into the regeneration drying tower.

[0129] In the hydrogen purification system 100, it is particularly important to reasonably determine the switching time of the working state of the drying tower. Premature switching is likely to cause incomplete desorption or insufficient cooling of the molecular sieve in the regeneration drying tower, and incomplete adsorption of the molecular sieve in the main drying tower; late switching is likely to cause energy waste in the regeneration drying tower and the problem of oversaturated adsorption of the molecular sieve in the main drying tower.

[0130] Based on the above problems, the embodiment of the present application provides a control method for the regeneration drying tower in a hydrogen purification system. This method can be applied to the hydrogen purification system 100 described above, as Figure 2 shown, which is the schematic flow chart corresponding to this method, and specifically includes the following steps:

[0131] Step 201, obtain the real-time hydrogen flow rate entering the hydrogen purification system at the current moment.

[0132] Step 202, determine the actual hydrogen processing capacity of the main drying tower according to the real-time hydrogen flow rate and the preset working cycle duration.

[0133] Step 203, judge whether the actual hydrogen processing capacity is greater than or equal to the preset theoretical hydrogen processing capacity. If the actual hydrogen processing capacity is greater than or equal to the preset theoretical hydrogen processing capacity, then execute step 206; otherwise, execute step 204.

[0134] Step 204, obtain the current working duration of the regeneration drying tower.

[0135] Step 205: Determine whether the current working duration of the regeneration drying tower has reached the preset working cycle duration. If the current working duration of the regeneration drying tower has reached the preset working cycle duration, then execute Step 206; otherwise, return to Step 201.

[0136] Step 206: Control the main drying tower and the regeneration drying tower to switch states.

[0137] In this way, compared with the method of switching the working state of the drying tower according to a fixed duration in the prior art, the method provided in this application is more in line with the actual working conditions of the hydrogen purification system, and can effectively avoid the problems that premature switching easily leads to incomplete desorption or insufficient cooling of the molecular sieve in the regeneration drying tower, and incomplete adsorption of the molecular sieve in the main drying tower, as well as avoid the problems that late switching easily leads to energy waste in the regeneration drying tower and oversaturation of the molecular sieve adsorption in the main drying tower.

[0138] Specifically, before executing Step 201, the working state of the regeneration drying tower can also be determined first. If the working state of the regeneration drying tower is the cold blow state, then execute the subsequent steps; if the working state of the regeneration drying tower is not the cold blow state, then the subsequent steps can be not executed until the working state of the regeneration drying tower is the cold blow state and then execute the subsequent steps.

[0139] In Steps 201 and 202, there are various ways to process the actual hydrogen treatment capacity of the main drying tower. One possible implementation is to determine the actual hydrogen treatment capacity of the main drying tower according to the real-time hydrogen flow rate entering the hydrogen purification system at the current moment, the real-time hydrogen flow rate entering the hydrogen purification system at any moment before the current moment, and the preset working cycle duration. Specifically, it can be determined by the following formula (1):

[0140]

[0141] In formula (1), m i is the actual hydrogen treatment capacity of the main drying tower; t is the preset working cycle duration; is the real-time hydrogen flow rate entering the hydrogen purification system at the i-th moment.

[0142] In other possible implementations, the actual hydrogen treatment capacity of the main drying tower can also be directly determined according to the product of the real-time hydrogen flow rate entering the hydrogen purification system at the current moment and the preset working cycle duration, so as to reduce the calculation amount and quickly estimate the actual hydrogen treatment capacity of the main drying tower.

[0143] In Step 203, the preset theoretical hydrogen treatment capacity can be determined according to the total hydrogen production of all electrolyzers and the preset working cycle duration. Specifically, it can be determined by the following formula (2):

[0144] m = η × Q × t, Formula (2)

[0145] In Formula (2), m is the preset theoretical hydrogen treatment capacity; η is the load of the electrolyzer; t is the preset working cycle duration; q is the sum of the rated hydrogen production capacities of all electrolyzers. Among them, for a set of hydrogen purification systems shared by multiple electrolyzers, if the rated hydrogen production capacity of each electrolyzer is the same, then Q = n * M, where n is the number of electrolyzers and M is the rated hydrogen production capacity of each electrolyzer; if the rated hydrogen production capacity of each electrolyzer is different, then Q = ∑M i , M i is the rated hydrogen production capacity of the i-th electrolyzer.

[0146] In Steps 204 to 206, the preset working cycle duration may include the preset heating working duration and the preset cold blow working duration. Among them, the preset heating working duration may refer to the duration when the regenerative working tower is in the heating stage that is preset in advance, and the preset cold blow working duration may refer to the duration when the regenerative working tower is in the cold blow stage that is preset in advance.

[0147] The current working duration of the regenerative drying tower may refer to the duration from when a certain drying tower is switched to the regenerative drying tower until the current moment. Among them, the current working duration of the regenerative drying tower may include the current heating working duration of the regenerative drying tower and the current cold blow working duration of the regenerative drying tower. The current heating working duration of the regenerative drying tower may refer to the duration from when the regenerative drying tower enters the heating stage until the current moment; the current cold blow working duration of the regenerative drying tower may refer to the duration from when the regenerative drying tower enters the cold blow stage until the current moment.

[0148] In this way, when judging whether the current working duration of the regenerative drying tower reaches the preset working cycle duration, it can specifically judge whether the current cold blow working duration of the regenerative drying tower reaches the preset cold blow working duration. If the current cold blow working duration of the regenerative drying tower reaches the preset cold blow working duration, then control the main drying tower and the regenerative drying tower to perform state switching.

[0149] Furthermore, if the working mode of the hydrogen purification system is a three-tower switching mode, the main drying tower, the secondary drying tower, and the regenerative drying tower can be controlled to perform state switching.

[0150] In the embodiments of the present application, in order to avoid energy waste, in Step 203 above, if the actual hydrogen treatment capacity is less than the preset theoretical hydrogen treatment capacity, it can also be judged whether the actual hydrogen treatment capacity is greater than the hydrogen treatment capacity that should be in the heating stage. If the actual hydrogen treatment capacity is greater than the hydrogen treatment capacity that should be in the heating stage, the intake air volume of the regenerative drying tower can be increased.

[0151] Among them, the hydrogen treatment amount in the heating stage is determined according to the preset theoretical hydrogen treatment amount, the preset working cycle duration, and the preset heating stage working duration. Specifically, it can be determined by the following formula (3):

[0152]

[0153] In formula (3), m'1 is the hydrogen treatment amount in the heating stage; m is the preset theoretical hydrogen treatment amount; t is the preset working cycle duration; t1 is the preset heating stage working duration.

[0154] Based on the same inventive concept, as Figure 3 shown, an embodiment of the present application also discloses a switching device for the working state of a drying tower in a hydrogen purification system, which is applied to the hydrogen purification system 100. The hydrogen purification system 100 includes a main drying tower in the main working state and a regenerative drying tower in the regenerative state. The device includes:

[0155] An acquisition unit 301, configured to acquire the real-time hydrogen flow rate entering the hydrogen purification system at the current moment;

[0156] A processing unit 302, configured to determine the actual hydrogen treatment amount of the main drying tower according to the real-time hydrogen flow rate and the preset working cycle duration;

[0157] A control unit 303, configured to determine whether the actual hydrogen treatment amount is greater than or equal to the preset theoretical hydrogen treatment amount. If the actual hydrogen treatment amount is greater than or equal to the preset theoretical hydrogen treatment amount, control the main drying tower and the regenerative drying tower to perform state switching.

[0158] Optionally, the acquisition unit 301 is further configured to:

[0159] If the actual hydrogen treatment amount is less than the preset theoretical hydrogen treatment amount, acquire the current working duration of the regenerative drying tower;

[0160] The control unit 303 is further configured to:

[0161] Determine whether the current working duration of the regenerative drying tower reaches the preset working cycle duration. If the current working duration of the regenerative drying tower reaches the preset working cycle duration, control the main drying tower and the regenerative drying tower to perform state switching.

[0162] Optionally, the preset working cycle duration includes a preset heating working duration and a preset cold blow working duration; the current working duration of the regenerative drying tower includes the current heating working duration and the current cold blow working duration of the regenerative drying tower;

[0163] The control unit 303 is specifically configured to:

[0164] Determine whether the current cold blow working duration of the regeneration drying tower reaches the preset cold blow working duration. If the current cold blow working duration of the regeneration drying tower reaches the preset cold blow working duration, control the main drying tower and the regeneration drying tower to perform a status switch.

[0165] Optionally, the control unit 303 is further configured to:

[0166] If the actual hydrogen processing amount is less than the preset theoretical hydrogen processing amount, determine whether the actual hydrogen processing amount is greater than the hydrogen processing amount during the heating stage; if the actual hydrogen processing amount is greater than the hydrogen processing amount during the heating stage, increase the intake air volume of the regeneration drying tower;

[0167] Wherein, the hydrogen processing amount during the heating stage is determined according to the preset theoretical hydrogen processing amount, the preset working cycle duration, and the preset heating stage working duration.

[0168] Optionally, the hydrogen processing amount corresponding to the current moment is determined by the following method:

[0169]

[0170] Wherein, m'1 is the hydrogen processing amount during the heating stage; m is the preset theoretical hydrogen processing amount; t is the preset working cycle duration; t1 is the preset heating stage working duration.

[0171] Optionally, the actual hydrogen processing amount of the main drying tower is determined by the following method:

[0172]

[0173] Wherein, m i is the actual hydrogen processing amount of the main drying tower; t is the preset working cycle duration; is the real-time hydrogen flow rate;

[0174] The preset theoretical hydrogen processing amount is determined by the following method:

[0175] m = 1.1 × P × t

[0176] Wherein, m is the preset theoretical hydrogen processing amount; t is the preset working cycle duration; P is the total hydrogen production amount of all electrolyzers.

[0177] Optionally, the hydrogen purification system further includes a secondary drying tower in a secondary working state;

[0178] The control unit 303 is specifically configured to:

[0179] Control the main drying tower, the secondary drying tower, and the regeneration drying tower to perform state switching.

[0180] Optionally, the processing unit 302 is further configured to:

[0181] Determine the working state of the regeneration drying tower;

[0182] If the working state of the regeneration drying tower is the cold blow state, perform subsequent steps.

[0183] Based on the same inventive concept, an embodiment of the present application also discloses a hydrogen purification system, which includes a main drying tower in the main working state, a regeneration drying tower in the regeneration state, a flow meter, and a controller; the flow meter is configured to:

[0184] Obtain the real-time hydrogen flow rate entering the hydrogen purification system at the current moment;

[0185] The controller is configured to:

[0186] According to the real-time hydrogen flow rate and the preset working cycle duration, determine the actual hydrogen processing amount of the main drying tower; judge whether the actual hydrogen processing amount is greater than or equal to the preset theoretical hydrogen processing amount. If the actual hydrogen processing amount is greater than or equal to the preset theoretical hydrogen processing amount, control the main drying tower and the regeneration drying tower to perform state switching.

[0187] Optionally, the hydrogen purification system further includes a timer; the timer is configured to:

[0188] If the actual hydrogen processing amount is less than the preset theoretical hydrogen processing amount, obtain the current working duration of the regeneration drying tower;

[0189] The controller is further configured to:

[0190] Judge whether the current working duration of the regeneration drying tower reaches the preset working cycle duration. If the current working duration of the regeneration drying tower reaches the preset working cycle duration, control the main drying tower and the regeneration drying tower to perform state switching.

[0191] Optionally, the preset working cycle duration includes a preset heating working duration and a preset cold blow working duration; the current working duration of the regeneration drying tower includes the current heating working duration and the current cold blow working duration of the regeneration drying tower;

[0192] The controller is specifically configured to:

[0193] Determine whether the current cold blow working duration of the regeneration drying tower reaches the preset cold blow working duration. If the current cold blow working duration of the regeneration drying tower reaches the preset cold blow working duration, then control the main drying tower and the regeneration drying tower to perform a status switch.

[0194] Optionally, the controller is further configured to:

[0195] If the actual hydrogen processing amount is less than the preset theoretical hydrogen processing amount, then determine whether the actual hydrogen processing amount is greater than the hydrogen processing amount that should be in the heating stage; if the actual hydrogen processing amount is greater than the hydrogen processing amount that should be in the heating stage, then increase the intake air volume of the regeneration drying tower;

[0196] Wherein, the hydrogen processing amount that should be in the heating stage is determined according to the preset theoretical hydrogen processing amount, the preset working cycle duration, and the preset heating stage working duration.

[0197] Optionally, the hydrogen processing amount that should be in the heating stage is determined by the following method:

[0198]

[0199] Wherein, m'1 is the hydrogen processing amount that should be in the heating stage; m is the preset theoretical hydrogen processing amount; t is the preset working cycle duration; t1 is the preset heating stage working duration.

[0200] Optionally, the actual hydrogen processing amount of the main drying tower is determined by the following method:

[0201]

[0202] Wherein, m i is the actual hydrogen processing amount of the main drying tower; t is the preset working cycle duration; is the real-time hydrogen flow rate;

[0203] The preset theoretical hydrogen processing amount is determined by the following method:

[0204] m = 1.1 × P × t

[0205] Wherein, m is the preset theoretical hydrogen processing amount; t is the preset working cycle duration; P is the total hydrogen production amount of all electrolytic cells.

[0206] Optionally, the hydrogen purification system further includes a secondary drying tower in a secondary working state;

[0207] The controller is specifically configured to:

[0208] Control the main drying tower, the secondary drying tower, and the regeneration drying tower to perform a status switch.

[0209] Optionally, the controller is further configured to:

[0210] Determine the operating state of the regeneration drying tower;

[0211] If the operating state of the regeneration drying tower is the cold blow state, perform subsequent steps.

[0212] 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.

[0213] Based on the same inventive concept, an embodiment of 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 described above is implemented.

[0214] 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 a computer chip or an entity, or by a product 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 any combination of these devices.

[0215] 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, the method executed by the client described above is implemented, or when the processor executes the program, the method executed by the server described above is implemented.

[0216] 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 section 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 through a bus. The input / output (I / O) interface is also connected to the bus.

[0217] The following components are connected to the I / O interface: an input part including a keyboard, a mouse, etc.; an output part including 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 mounted on the drive as needed so that computer programs read from them can be installed in the storage part as needed.

[0218] Specifically, according to an embodiment of the present application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, an embodiment of the present application includes a computer program product that tangibly includes a computer program on a machine-readable medium, the computer program including program code for performing the methods shown in the flowcharts. In such an embodiment, the computer program can be downloaded and installed from a network via the communication part, and / or installed from a removable medium.

[0219] Computer-readable media includes both permanent and non-permanent, removable and non-removable media and can be implemented by any method or technology for storing information. 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 discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that can be used to store information that can be accessed by a computing device. As defined herein, computer-readable media does not include transitory computer-readable media such as modulated data signals and carrier waves.

[0220] For convenience of description, when describing the above device, it is divided into various units according to functions and described separately. Of course, when implementing the present application, the functions of each unit can be implemented in one or more software and / or hardware.

[0221] This application is described with reference to the flowcharts and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present application. It should be understood that each flow and / or block in the flowchart and / or block diagram, and the combination of flows 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 device to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing device produce means for implementing the functions specified in one flow Figure 1 one flow or multiple flows and / or blocks Figure 1 or means for implementing the functions specified in one block or multiple blocks.

[0222] 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 produce a manufactured article including instruction means that implement the functions specified in one flow Figure 1 one flow or multiple flows and / or blocks Figure 1 or means for implementing the functions specified in one block or multiple blocks.

[0223] These computer program instructions can also be loaded onto a computer or other programmable data processing device, such that a series of operation steps are executed on the computer or other programmable device to produce a computer-implemented process, so that the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one flow Figure 1 one flow or multiple flows and / or blocks Figure 1 or means for implementing the functions specified in one block or multiple blocks.

[0224] 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 including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, commodity or device. Without further limitation, an element defined by the statement "including one..." does not exclude the presence of another identical element in the process, method, commodity or device including the said element.

[0225] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, system or computer program product. Therefore, the present application can take the form of a completely hardware embodiment, a completely 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.

[0226] This application may 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 may 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 may be located in local and remote computer storage media including storage devices.

[0227] Each embodiment in this specification is described in a progressive manner. For the same or similar parts among the embodiments, reference can be made to each other. Each embodiment focuses on the differences from other embodiments. In particular, for system embodiments, since they are basically similar to method embodiments, the description is relatively simple. For related parts, reference can be made to the partial description of the method embodiments.

[0228] 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 the working state of a drying tower in a hydrogen purification system, characterized in that, The method is applied to the hydrogen purification system, which includes a main drying tower in the main working state and a regenerative drying tower in the regeneration state; the method includes: Obtain the real-time hydrogen flow rate entering the hydrogen purification system at the current moment; Determine the actual hydrogen processing capacity of the main drying tower according to the real-time hydrogen flow rate and the preset working cycle duration; Judge whether the actual hydrogen processing capacity is greater than or equal to the preset theoretical hydrogen processing capacity. If the actual hydrogen processing capacity is greater than or equal to the preset theoretical hydrogen processing capacity, control the main drying tower and the regenerative drying tower to switch states.

2. The method according to claim 1, characterized in that, The method further includes: If the actual hydrogen processing capacity is less than the preset theoretical hydrogen processing capacity, obtain the current working duration of the regenerative drying tower; Judge whether the current working duration of the regenerative drying tower reaches the preset working cycle duration. If the current working duration of the regenerative drying tower reaches the preset working cycle duration, control the main drying tower and the regenerative drying tower to switch states.

3. The method according to claim 2, wherein The preset working cycle duration includes a preset heating working duration and a preset cold blow working duration; the current working duration of the regenerative drying tower includes the current heating working duration and the current cold blow working duration of the regenerative drying tower; Judge whether the current working duration of the regenerative drying tower reaches the preset working cycle duration. If the current working duration of the regenerative drying tower reaches the preset working cycle duration, controlling the main drying tower and the regenerative drying tower to switch states includes: Judge whether the current cold blow working duration of the regenerative drying tower reaches the preset cold blow working duration. If the current cold blow working duration of the regenerative drying tower reaches the preset cold blow working duration, control the main drying tower and the regenerative drying tower to switch states.

4. The method according to claim 2, wherein The method further includes: If the actual hydrogen processing capacity is less than the preset theoretical hydrogen processing capacity, judge whether the actual hydrogen processing capacity is greater than the hydrogen processing capacity required in the heating stage; If the actual hydrogen processing capacity is greater than the hydrogen processing capacity required in the heating stage, increase the intake air volume of the regenerative drying tower; Wherein, the hydrogen processing capacity required in the heating stage is determined according to the preset theoretical hydrogen processing capacity, the preset working cycle duration and the preset heating stage working duration.

5. The method according to claim 4, wherein The hydrogen processing capacity required in the heating stage is determined by the following method: Wherein, m'1 is the hydrogen processing capacity required in the heating stage; m is the preset theoretical hydrogen processing capacity; t is the preset working cycle duration; t1 is the preset heating stage working duration.

6. The method according to claim 1, characterized in that The actual hydrogen processing capacity of the main drying tower is determined by the following method: where m i is the actual hydrogen treatment capacity of the main drying tower; t is the preset working cycle duration; is the real-time hydrogen flow rate; The preset theoretical hydrogen processing capacity is determined by the following method: m = 1.1×Q×t Wherein, m is the preset theoretical hydrogen processing capacity; t is the preset working cycle duration; Q is the total hydrogen production of all electrolytic cells.

7. The method according to any one of claims 1 to 6, characterized in that, The hydrogen purification system further includes a secondary drying tower in the secondary working state; Controlling the main drying tower and the regenerative drying tower to switch states includes: Control the main drying tower, the secondary drying tower and the regeneration drying tower to perform state switching.

8. The method according to any one of claims 1 to 6, characterized in that Before determining the actual hydrogen processing capacity of the main drying tower, the method further includes: Determine the working state of the regeneration drying tower; If the working state of the regeneration drying tower is the cold blow state, perform subsequent steps.

9. A switching device for the working state of a drying tower in a hydrogen purification system, characterized in that, The hydrogen purification system includes a main drying tower in the main working state and a regeneration drying tower in the regeneration state; the device includes: An acquisition unit for acquiring the real-time hydrogen flow rate entering the hydrogen purification system at the current moment; A processing unit for determining the actual hydrogen processing capacity of the main drying tower according to the real-time hydrogen flow rate and the preset working cycle duration; A control unit for judging whether the actual hydrogen processing capacity is greater than or equal to the preset theoretical hydrogen processing capacity. If the actual hydrogen processing capacity is greater than or equal to the preset theoretical hydrogen processing capacity, control the main drying tower and the regeneration drying tower to perform state switching.

10. A hydrogen purification system, characterized in that, The hydrogen purification system includes a main drying tower in the main working state, a regeneration drying tower in the regeneration state, a flow meter and a controller; the flow meter is configured to: Acquire the real-time hydrogen flow rate entering the hydrogen purification system at the current moment; The controller is configured to: Determine the actual hydrogen processing capacity of the main drying tower according to the real-time hydrogen flow rate and the preset working cycle duration; judge whether the actual hydrogen processing capacity is greater than or equal to the preset theoretical hydrogen processing capacity. If the actual hydrogen processing capacity is greater than or equal to the preset theoretical hydrogen processing capacity, control the main drying tower and the regeneration drying tower to perform state switching.

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, it implements the method according to any one of claims 1 to 8.

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

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