Control method and controller for regeneration drying tower in hydrogen purification system and hydrogen purification system

Abstract

The invention provides a control method of a regeneration drying tower in a hydrogen purification system, a controller and the hydrogen purification system, and if the actual heating duration of the regeneration drying tower is greater than or equal to the theoretical heating duration of the regeneration drying tower, the regeneration drying tower is controlled to enter a cold blowing stage. In other words, the time for switching the regeneration drying tower from the heating stage to the cold blowing stage is determined by comparing the actual heating duration with the theoretical heating duration, and the theoretical heating duration is determined according to the historical hydrogen treatment capacity and is not constant. Compared with a mode of switching a heating stage and a cold blowing stage according to a fixed time length in the prior art, the method provided by the invention better conforms to the actual working condition of the hydrogen purification system, and can effectively avoid the situation that the molecular sieve in the regeneration drying tower is incompletely desorbed or causes energy waste, so that the regeneration efficiency can be improved, and the energy consumption is reduced. And the requirements of green power fluctuation scenes are met.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen production by electrolyzing water, and particularly relates to a control method, a controller and a hydrogen purification system for a regeneration drying tower in 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 of ≥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] The regeneration drying tower includes two stages, namely a heating stage and a cold blow stage, within one working cycle. In the heating stage, the regeneration drying tower is mainly used for molecular sieve desorption; in the cold blow stage, the temperature is reduced by continuously introducing gas into the regeneration drying tower.

[0004] During the entire working process of the regeneration drying tower, it is particularly important to reasonably determine the heating duration of the heating stage of the regeneration drying tower. If the heating duration is too short, it will easily lead to incomplete desorption of the molecular sieve in the regeneration drying tower; if the heating time is too long, it will easily cause energy waste. Especially under dynamic working conditions, the gas flow rate entering the hydrogen purification system fluctuates. If heating is carried out according to a fixed duration, it is more likely to cause incomplete desorption of the molecular sieve in the regeneration drying tower or the problem of energy waste. Summary of the Invention

[0005] An object of the present application is to provide a control method for a regeneration drying tower in a hydrogen purification system, to solve the problem that the existing hydrogen purification system is prone to incomplete desorption of the molecular sieve in the regeneration drying tower or energy waste. Another object of the present application is to provide a controller. 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.

[0006] To achieve the above objects, in the first aspect of the present application, a control method for a regeneration drying tower in a hydrogen purification system is disclosed. The method is applied to a hydrogen purification system, and the hydrogen purification system includes a main drying tower in a main working state and a regeneration drying tower in a regeneration state. The method includes:

[0007] Judging whether the actual heating duration of the regeneration drying tower is greater than or equal to the theoretical heating duration of the regeneration drying tower;

[0008] If the actual heating duration is greater than or equal to the theoretical heating duration, control the regeneration drying tower to enter the cold blow stage;

[0009] Wherein, the theoretical heating duration is determined according to the historical hydrogen processing capacity of the regeneration drying tower and the rated hydrogen processing capacity of the regeneration drying tower, or is determined according to the historical hydrogen processing capacity of the main drying tower, the maximum hydrogen processing capacity of the main drying tower, and a preset heating duration.

[0010] Optionally, the historical hydrogen processing capacity of the regeneration drying tower is determined by the following method:

[0011]

[0012] Wherein, m R,h is the historical hydrogen processing capacity of the regeneration drying tower; is the real-time hydrogen flow rate entering the regeneration drying tower at the i-th moment of the historical working cycle; t is the preset working cycle duration;

[0013] The rated hydrogen processing capacity of the regeneration drying tower is determined by the following method:

[0014]

[0015] Wherein, m R,r is the rated hydrogen processing capacity of the regeneration drying tower; M n is the rated hydrogen production of the n-th electrolyzer; n is the number of electrolyzers; x is the proportion of the regeneration gas volume of the regeneration drying tower to the rated hydrogen processing capacity of the main drying tower;

[0016] The theoretical heating duration is determined by the following method:

[0017]

[0018] Wherein, t h,t is the theoretical heating duration; m R,h is the historical hydrogen processing capacity of the regeneration drying tower; m R,r is the rated hydrogen processing capacity of the regeneration drying tower.

[0019] Optionally, the historical hydrogen processing capacity of the main drying tower is determined by the following method:

[0020]

[0021] Wherein, m D,h is the historical hydrogen processing capacity of the main drying tower; is the real-time hydrogen flow rate entering the hydrogen purification system at the i-th moment of the historical working cycle; t is the preset working cycle duration;

[0022] The maximum hydrogen processing capacity of the main drying tower is determined by the following method:

[0023]

[0024] where m D,m is the maximum hydrogen processing capacity of the main drying tower; p is the ratio corresponding to the maximum load; t is the preset working cycle duration; M n is the rated hydrogen production of the nth electrolyzer; n is the number of electrolyzers;

[0025] The theoretical heating duration is determined by the following method:

[0026]

[0027] where t h,t is the theoretical heating duration; m D,h is the historical hydrogen processing capacity of the main drying tower; m D,m is the maximum hydrogen processing capacity of the main drying tower; t h is the preset heating duration.

[0028] Optionally, after controlling the regeneration drying tower to be in the cold blow stage, the method further includes:

[0029] Obtain the actual working duration of the cold blow stage of the regeneration drying tower;

[0030] Judge whether the actual working duration of the cold blow stage reaches the preset cold blow duration. If the actual working duration of the cold blow stage reaches the preset cold blow duration, control the main drying tower and the regeneration drying tower to perform a status switch.

[0031] Optionally, after controlling the regeneration drying tower to be in the cold blow stage, the method further includes:

[0032] Determine the actual hydrogen processing capacity of the main drying tower according to the real-time hydrogen flow rate entering the hydrogen purification system, the actual heating duration of the regeneration drying tower, and the preset cold blow duration;

[0033] Judge whether the actual hydrogen processing capacity of the main drying tower is greater than or equal to the maximum hydrogen processing capacity of the main drying tower. If the actual hydrogen processing capacity of the main drying tower is greater than or equal to the maximum hydrogen processing capacity of the main drying tower, control the main drying tower and the regeneration drying tower to perform a status switch.

[0034] Optionally, the actual hydrogen processing capacity of the main drying tower is determined by the following method:

[0035]

[0036] wherein, m D,a is the actual hydrogen treatment capacity of the main drying tower; t h,a is the actual heating duration of the regeneration drying tower; t c is the preset cold blow duration; is the real-time hydrogen flow rate entering the hydrogen purification system at the i-th moment in the current working cycle.

[0037] Optionally, the method further includes:

[0038] If the actual hydrogen treatment capacity of the main drying tower is less than the maximum hydrogen treatment capacity of the main drying tower, it is determined whether the actual hydrogen treatment capacity of the main drying tower is greater than the theoretical hydrogen treatment capacity of the main drying tower during the heating stage;

[0039] If the actual hydrogen treatment capacity of the main drying tower is greater than the theoretical hydrogen treatment capacity of the main drying tower during the heating stage, the intake air volume of the regeneration drying tower is increased;

[0040] wherein, the theoretical hydrogen treatment capacity of the main drying tower during the heating stage is determined according to the maximum hydrogen treatment capacity of the main drying tower, the preset working cycle duration and the preset heating duration.

[0041] Optionally, the theoretical hydrogen treatment capacity of the main drying tower during the heating stage is determined by the following method:

[0042]

[0043] wherein, m D,s is the theoretical hydrogen treatment capacity of the main drying tower during the heating stage; m D,m is the maximum hydrogen treatment capacity of the main drying tower; t is the preset working cycle duration; t h is the preset heating duration.

[0044] Optionally, the hydrogen purification system further includes a secondary drying tower in a secondary working state;

[0045] Controlling the state switching of the main drying tower and the regeneration drying tower includes:

[0046] Controlling the state switching of the main drying tower, the secondary drying tower and the regeneration drying tower.

[0047] In a second aspect, the present application also discloses a controller applied to 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, and the controller includes:

[0048] A judgment module, configured to judge whether the actual heating duration of the regeneration drying tower is greater than or equal to the theoretical heating duration of the regeneration drying tower;

[0049] A control module, configured to control the regeneration drying tower to enter a cold blow stage if the actual heating duration is greater than or equal to the theoretical heating duration;

[0050] Wherein, the theoretical heating duration is determined according to the historical hydrogen processing amount of the regeneration drying tower and the rated hydrogen processing amount of the regeneration drying tower, or is determined according to the historical hydrogen processing amount of the main drying tower, the maximum hydrogen processing amount of the main drying tower, and a preset heating duration.

[0051] Optionally, the historical hydrogen processing amount of the regeneration drying tower is determined by the following method:

[0052]

[0053] Wherein, m R,h is the historical hydrogen processing amount of the regeneration drying tower; is the real-time hydrogen flow rate entering the regeneration drying tower at the i-th moment in the historical working cycle; t is the preset working cycle duration;

[0054] The rated hydrogen processing amount of the regeneration drying tower is determined by the following method:

[0055]

[0056] Wherein, m R,r is the rated hydrogen processing amount of the regeneration drying tower; M n is the rated hydrogen production of the n-th electrolyzer; n is the number of electrolyzers; x is the proportion of the regeneration gas volume of the regeneration drying tower to the rated hydrogen processing amount of the main drying tower;

[0057] The theoretical heating duration is determined by the following method:

[0058]

[0059] Wherein, t h,t is the theoretical heating duration; m R,h is the historical hydrogen processing amount of the regeneration drying tower; m R,r is the rated hydrogen processing amount of the regeneration drying tower.

[0060] Optionally, the historical hydrogen processing amount of the main drying tower is determined by the following method:

[0061]

[0062] Wherein, m D,his the historical hydrogen processing capacity of the main drying tower; is the real-time hydrogen flow rate entering the hydrogen purification system at the i-th moment in the historical working cycle; t is the preset duration of the working cycle;

[0063] The maximum hydrogen processing capacity of the main drying tower is determined by the following method:

[0064]

[0065] where m D,m is the maximum hydrogen processing capacity of the main drying tower; p is the ratio corresponding to the maximum load; t is the preset duration of the working cycle; M n is the rated hydrogen production of the n-th electrolyzer; n is the number of electrolyzers;

[0066] The theoretical heating duration is determined by the following method:

[0067]

[0068] where t h,t is the theoretical heating duration; m D,h is the historical hydrogen processing capacity of the main drying tower; m D,m is the maximum hydrogen processing capacity of the main drying tower; t h is the preset heating duration.

[0069] Optionally, the controller further includes:

[0070] an acquisition module, configured to acquire the actual working duration of the cold blow stage of the regeneration drying tower;

[0071] The judgment module is further configured to judge whether the actual working duration of the cold blow stage reaches the preset cold blow duration;

[0072] The control module is further configured to control the main drying tower and the regeneration drying tower to perform state switching if the actual working duration of the cold blow stage reaches the preset cold blow duration.

[0073] Optionally, the controller further includes:

[0074] a processing module, configured to determine the actual hydrogen processing capacity of the main drying tower according to the real-time hydrogen flow rate entering the hydrogen purification system, the actual heating duration of the regeneration drying tower, and the preset cold blow duration;

[0075] The judgment module is further configured to judge whether the actual hydrogen processing capacity of the main drying tower is greater than or equal to the maximum hydrogen processing capacity of the main drying tower;

[0076] The control module is further configured to control the main drying tower and the regeneration drying tower to switch states if the actual hydrogen processing capacity of the main drying tower is greater than or equal to the maximum hydrogen processing capacity of the main drying tower.

[0077] Optionally, the actual hydrogen processing capacity of the main drying tower is determined by the following method:

[0078]

[0079] where m D,a is the actual hydrogen processing capacity of the main drying tower; t h,a is the actual heating duration of the regeneration drying tower; t c is the preset cold blow duration; is the real-time hydrogen flow rate entering the hydrogen purification system at the i-th moment in the current working cycle.

[0080] Optionally, the judgment module is further configured to:

[0081] If the actual hydrogen processing capacity of the main drying tower is less than the maximum hydrogen processing capacity of the main drying tower, judge whether the actual hydrogen processing capacity of the main drying tower is greater than the theoretical hydrogen processing capacity of the main drying tower during the heating stage;

[0082] The control module is further configured to increase the intake air volume of the regeneration drying tower if the actual hydrogen processing capacity of the main drying tower is greater than the theoretical hydrogen processing capacity of the main drying tower during the heating stage;

[0083] where the theoretical hydrogen processing capacity of the main drying tower during the heating stage is determined according to the maximum hydrogen processing capacity of the main drying tower, the preset working cycle duration, and the preset heating duration.

[0084] Optionally, the theoretical hydrogen processing capacity of the main drying tower during the heating stage is determined by the following method:

[0085]

[0086] where m D,s is the theoretical hydrogen processing capacity of the main drying tower during the heating stage; m D,m is the maximum hydrogen processing capacity of the main drying tower; t is the preset working cycle duration; t h is the preset heating duration.

[0087] Optionally, the hydrogen purification system further includes a secondary drying tower in a secondary working state;

[0088] The control module is specifically configured to:

[0089] Control the main drying tower, the secondary drying tower and the regeneration drying tower to perform state switching.

[0090] In a third aspect, 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, and the controller described above.

[0091] In a fourth aspect, 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.

[0092] In a fifth aspect, the present application also discloses a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the method described above is implemented.

[0093] Compared with the prior art, in the control method of the regeneration drying tower in the hydrogen purification system provided by the present application, the theoretical heating duration is determined according to the historical hydrogen processing amount of the regeneration drying tower and the rated hydrogen processing amount of the regeneration drying tower, or the theoretical heating duration is determined according to the historical hydrogen processing amount of the main drying tower, the maximum hydrogen processing amount of the main drying tower, and a preset heating duration. Then, it is judged whether the actual heating duration of the regeneration drying tower is greater than or equal to the theoretical heating duration of the regeneration drying tower. If the actual heating duration is greater than or equal to the theoretical heating duration, the regeneration drying tower is controlled to enter the cold blow stage. In the present application, the timing of switching the regeneration drying tower from the heating stage to the cold blow stage is determined by comparing the actual heating duration and the theoretical heating duration, and the theoretical heating duration is determined according to the historical hydrogen processing amount, not fixed. Compared with the prior art method of switching the heating stage and the cold blow stage according to a fixed duration, the method provided by the present application is more in line with the actual working conditions of the hydrogen purification system, can effectively avoid the incomplete desorption of molecular sieves in the regeneration drying tower or the situation of energy waste, thereby improving the regeneration efficiency and meeting the needs of the green power fluctuation scenario. Description of the Drawings

[0094] Figure 1 is a schematic structural diagram of a hydrogen purification system provided by an embodiment of the present application;

[0095] Figure 2 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;

[0096] Figure 3 is a schematic flow chart corresponding to a switching method for a drying tower provided by an embodiment of the present application;

[0097] Figure 4It is a schematic flow chart corresponding to another method for switching the drying tower provided by an embodiment of the present application;

[0098] Figure 5 It is a schematic flow chart corresponding to yet another method for switching the drying tower provided by an embodiment of the present application;

[0099] Figure 6 It is a schematic flow chart corresponding to a method for adjusting the hydrogen flow rate of a regenerated drying tower provided by an embodiment of the present application;

[0100] Figure 7 It is a schematic structural diagram of a controller provided by an embodiment of the present application;

[0101] Among them, the reference numerals are explained as follows:

[0102] 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 implementation manners

[0103] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with 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. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0104] It should be noted that the terms "first", "second", etc. in the description, claims and the above-mentioned drawings of this application are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so as to implement 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.

[0105] In this application, the orientation or positional relationship indicated by the terms "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 drawings. These terms are mainly used to better describe this application and its embodiments, and are not used to limit that the indicated device, element or component must have a specific orientation or be constructed and operated in a specific orientation.

[0106] The positional relationships such as "parallel" or "perpendicular" include not only the completely "parallel" or "perpendicular" positional relationships, but also the positional relationships with an angular deviation within a preset deviation range relative to the completely "parallel" or "perpendicular" ones.

[0107] Moreover, in addition to being able 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 specific circumstances.

[0108] In addition, the terms "install", "set", "be provided with", "connect", "be connected", "be sleeved" 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 this application can be understood according to specific circumstances.

[0109] 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 7 and in combination with embodiments to detail this application.

[0110] For an electrolytic water hydrogen production system, it can be a one-to-one structure where one electrolyzer uses a set of hydrogen purification systems alone, 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 highest 110% load, 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 lowest 40% load, 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 lowest load of 40%, the amount of hydrogen that the hydrogen purification system needs to process is 10% of the rated value.

[0111] 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. 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.

[0112] Next, taking the three-tower switching mode as an example, combined with Figure 1 the structural schematic diagram of the hydrogen purification system shown, the hydrogen purification system and its working mode in the embodiments of the present application will be described in detail.

[0113] 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.

[0114] 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, and 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. 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. 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. 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. 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.

[0115] 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. 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.

[0116] 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. A plurality of valves are also provided in the hydrogen purification system 100. 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.

[0117] 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, increasing or decreasing the number of devices such as drying towers, pipelines, or valves, adjusting the layout of devices such as drying towers, pipelines, or valves, or the connection methods between them. Specific details are not limited.

[0118] 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:

[0119] 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.

[0120] 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.

[0121] Specifically, the gas enters the first gas-water separator 121, is subjected to gas-liquid separation treatment and then enters the deoxidation tower 140, is subjected to deoxidation treatment and then enters the first condenser 132, is subjected to heat exchange treatment and then enters the second gas-water separator 122, is subjected to gas-liquid separation treatment and then enters the third gas-water separator 123, is again subjected to gas-liquid separation treatment and then enters the second condenser 132, is subjected to heat exchange treatment and then enters the first drying tower 111, is subjected to drying treatment and then 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.

[0122] The gas coming out of the first drying tower 111 enters the second drying tower 112 through the regeneration pipeline, is subjected to drying treatment and then enters the third condenser 133, is subjected to heat exchange treatment and then enters the fourth gas-water separator 124, is subjected to gas-liquid separation treatment and then enters the fifth gas-water separator 125, is again subjected to gas-liquid separation treatment and then enters the fourth condenser 134, is subjected to heat exchange treatment and then enters the third drying tower 113, is subjected to drying treatment and then discharged from the regeneration pipeline (or enters the second drying tower 112 again for circulation).

[0123] 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:

[0124] 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.

[0125] 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.

[0126] For the specific working process, reference can be made 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.

[0127] 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:

[0128] 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.

[0129] 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.

[0130] For the specific working process, reference can be made 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.

[0131] 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 for gas drying, 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, within one 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.

[0132] During the working process of the regeneration drying tower, it is particularly important to reasonably determine the heating duration of the heating stage of the regeneration drying tower. If the heating duration is too short, it will easily lead to incomplete desorption of the molecular sieve in the regeneration drying tower, and if the heating time is too long, it will easily cause energy waste. Especially under dynamic working conditions (that is, the input current changes dynamically), the gas flow rate entering the hydrogen purification system 100 is fluctuating. If heating is carried out according to a fixed duration, it is more likely to cause incomplete desorption of the molecular sieve in the regeneration drying tower or energy waste problems.

[0133] 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, such as Figure 2 shown, which is a schematic flow chart corresponding to this method, and specifically includes the following steps:

[0134] Step 201, determine whether the actual heating duration of the regeneration drying tower is greater than or equal to the theoretical heating duration of the regeneration drying tower. If the actual heating duration is greater than or equal to the theoretical heating duration, then execute step 202; otherwise, return to step 201.

[0135] Step 202, control the regeneration drying tower to enter the cold blow stage.

[0136] In this application, the timing for the regeneration drying tower to switch from the heating stage to the cold blow stage is determined by comparing the actual heating duration with the theoretical heating duration. Moreover, the theoretical heating duration is determined based on the historical hydrogen treatment volume and is not fixed. Compared with the method of switching between the heating stage and the cold blow stage 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, can effectively avoid the incomplete desorption of the molecular sieve in the regeneration drying tower or the situation of energy waste, and thus can improve the regeneration efficiency and meet the needs of the green power fluctuation scenario.

[0137] Specifically, in step 201, there are various ways to determine the theoretical heating duration. One possible implementation is that the theoretical heating duration can be determined based on the historical hydrogen treatment volume of the regeneration drying tower and the rated hydrogen treatment volume of the regeneration drying tower.

[0138] Among them, the historical hydrogen treatment volume of the regeneration drying tower refers to the hydrogen treatment volume of the regeneration drying tower in the regeneration working state during the historical working cycle. Exemplarily, the historical hydrogen treatment volume of the regeneration drying tower can be determined by the following formula (1):

[0139]

[0140] In formula (1), m R,h is the historical hydrogen treatment volume of the regeneration drying tower; is the real-time hydrogen flow rate entering the regeneration drying tower at the i-th moment during the historical working cycle; t is the preset working cycle duration.

[0141] It should be noted that formula (1) only provides an example for calculating the historical hydrogen treatment volume of the regeneration drying tower. In other possible examples, those skilled in the art can adjust it according to experience or actual situations. For example, when the actual durations of the historical working cycles are not exactly the same, t can be adjusted to the actual duration of the historical working cycle, and specific details are not limited.

[0142] There are various calculation methods for the rated hydrogen treatment volume of the regeneration drying tower. For an electrolytic water hydrogen production system with a one-to-one structure, the rated hydrogen treatment volume of the regeneration drying tower can be determined based on the rated hydrogen production of the electrolytic cell and the proportion of the regeneration gas volume of the regeneration drying tower in the rated hydrogen treatment volume of the main drying tower. For an electrolytic water hydrogen production system with a multi-to-one structure, if the rated hydrogen production of each electrolytic cell is the same, then the rated hydrogen treatment volume of the regeneration drying tower can be determined according to the following formula (2); if the rated hydrogen production of each electrolytic cell is different, then the rated hydrogen treatment volume of the regeneration drying tower can be determined according to the following formula (3).

[0143] Among them:

[0144] m R,r= x × n × M Formula (2)

[0145] In Formula (2), m R,r is the rated hydrogen processing capacity of the regeneration drying tower; M is the rated hydrogen production of each electrolyzer; n is the number of electrolyzers; x is the ratio of the regeneration gas volume of the regeneration drying tower to the rated hydrogen processing capacity of the main drying tower.

[0146]

[0147] In Formula (3), m R,r is the rated hydrogen processing capacity of the regeneration drying tower; M n is the rated hydrogen production of the nth electrolyzer; n is the number of electrolyzers; x is the ratio of the regeneration gas volume of the regeneration drying tower to the rated hydrogen processing capacity of the main drying tower.

[0148] Furthermore, the theoretical heating duration can be determined, specifically according to the following Formula (4):

[0149]

[0150] In Formula (4), t h,t is the theoretical heating duration; m R,h is the historical hydrogen processing capacity of the regeneration drying tower; m R,r is the rated hydrogen processing capacity of the regeneration drying tower. Among them, m R,h can be determined according to the above Formula (1), and m R,r can be determined according to the above Formula (2) or Formula (3).

[0151] Another possible implementation is that the theoretical heating duration can also be determined according to the historical hydrogen processing capacity of the main drying tower, the maximum hydrogen processing capacity of the main drying tower, and the preset heating duration.

[0152] Among them, the historical hydrogen processing capacity of the main drying tower refers to the hydrogen processing capacity of the main drying tower in the main working state during the historical working cycle. Exemplarily, the historical hydrogen processing capacity of the main drying tower can be determined by the following Formula (5):

[0153]

[0154] In Formula (5), m D,h is the historical hydrogen processing capacity of the main drying tower; is the real-time hydrogen flow rate entering the hydrogen purification system at the ith moment during the historical working cycle; t is the preset working cycle duration;

[0155] It should be noted that the formula (5) only provides an example for calculating the historical hydrogen processing capacity of the main drying tower. In other possible examples, those skilled in the art can adjust it according to experience or actual situations. For example, when the actual duration of the historical working cycle is not exactly the same, t can be adjusted to the actual duration of the historical working cycle, and no specific limitation is made.

[0156] The maximum hydrogen processing capacity of the main drying tower refers to the hydrogen processing capacity of the main drying tower under the maximum load condition. For a one-to-many structured electrolytic water hydrogen production system, if the rated hydrogen production of each electrolytic cell is the same, the rated hydrogen processing capacity of the regeneration drying tower can be determined according to the following formula (6); if the rated hydrogen production of each electrolytic cell is different, the rated hydrogen processing capacity of the regeneration drying tower can be determined according to the following formula (7).

[0157] Where:

[0158] m D,m = p × t × n × M Formula (6)

[0159] In formula (6), m D,m is the maximum hydrogen processing capacity of the main drying tower; p is the ratio corresponding to the maximum load; t is the preset working cycle duration; M is the rated hydrogen production of each electrolytic cell; n is the number of electrolytic cells.

[0160]

[0161] In formula (7), m D,m is the maximum hydrogen processing capacity of the main drying tower; p is the ratio corresponding to the maximum load; t is the preset working cycle duration; M n is the rated hydrogen production of the nth electrolytic cell; n is the number of electrolytic cells.

[0162] Furthermore, the theoretical heating duration can be determined, specifically according to the following formula (8):

[0163]

[0164] In formula (8), t h,t is the theoretical heating duration; m D,h is the historical hydrogen processing capacity of the main drying tower; m D,m is the maximum hydrogen processing capacity of the main drying tower; t h is the preset heating duration. Among them, m D,h can be determined according to the above formula (5), and m D,m can be determined according to the above formula (7) or formula (8).

[0165] In step 202, after determining the theoretical heating duration, if the actual heating duration of the regeneration drying tower is greater than or equal to the theoretical heating duration, control the regeneration drying tower to enter the cold blow stage.

[0166] Further, after controlling the regeneration drying tower to be in the cold blow stage, the present application embodiment also provides a method for switching the drying tower. In a possible implementation manner, specifically as Figure 3 shown, it is a schematic flowchart corresponding to a method for switching a drying tower provided by an embodiment of the present application, specifically including the following steps:

[0167] Step 301, obtain the actual working duration of the cold blow stage of the regeneration drying tower.

[0168] Step 302, determine whether the actual working duration of the cold blow stage reaches a preset cold blow duration. If the actual working duration of the cold blow stage reaches the preset cold blow duration, execute step 303; otherwise, return to step 301.

[0169] Step 303, control the main drying tower and the regeneration drying tower to perform a status switch.

[0170] In another possible implementation manner, specifically as Figure 4 shown, it is a schematic flowchart corresponding to another method for switching a drying tower provided by an embodiment of the present application, specifically including the following steps:

[0171] Step 401, determine the actual hydrogen processing capacity of the main drying tower according to the real-time hydrogen flow rate entering the hydrogen purification system, the actual heating duration of the regeneration drying tower, and the preset cold blow duration.

[0172] Among them, the actual hydrogen processing capacity of the main drying tower can be determined by the following formula (9):

[0173]

[0174] Among them, m D,a is the actual hydrogen processing capacity of the main drying tower; t h,a is the actual heating duration of the regeneration drying tower; t c is the preset cold blow duration; is the real-time hydrogen flow rate entering the hydrogen purification system at the i-th moment in the current working cycle.

[0175] Step 402, determine whether the actual hydrogen processing capacity of the main drying tower is greater than or equal to the maximum hydrogen processing capacity of the main drying tower. If the actual hydrogen processing capacity of the main drying tower is greater than or equal to the maximum hydrogen processing capacity of the main drying tower, execute step 403; otherwise, return to step 401.

[0176] Step 403, control the main drying tower and the regeneration drying tower to perform a status switch.

[0177] In another possible implementation, specifically as Figure 5 shown, it is a schematic flowchart corresponding to another method for switching a drying tower provided by an embodiment of the present application, which specifically includes the following steps:

[0178] Step 501, determine the actual hydrogen processing capacity of the main drying tower according to the real-time hydrogen flow rate entering the hydrogen purification system, the actual heating duration of the regenerative drying tower, and the preset cold blow duration.

[0179] Step 502, determine whether the actual hydrogen processing capacity of the main drying tower is greater than or equal to the maximum hydrogen processing capacity of the main drying tower. If the actual hydrogen processing capacity of the main drying tower is greater than or equal to the maximum hydrogen processing capacity of the main drying tower, then execute Step 505; otherwise, execute Step 503.

[0180] Step 503, obtain the actual working duration of the cold blow stage of the regenerative drying tower.

[0181] Step 504, determine whether the actual working duration of the cold blow stage reaches the preset cold blow duration. If the actual working duration of the cold blow stage reaches the preset cold blow duration, then execute Step 505; otherwise, return to Step 501.

[0182] Step 505, control the main drying tower and the regenerative drying tower to perform a status switch.

[0183] In an alternative implementation, if there is also a secondary drying tower in the hydrogen purification system 100 in a secondary working state, then when performing the drying tower switch, it is possible to control the main drying tower, the secondary drying tower, and the regenerative drying tower to perform a status switch.

[0184] Furthermore, before controlling the main drying tower and the regenerative drying tower to perform a status switch, the embodiment of the present application also provides a method for adjusting the hydrogen flow rate of the regenerative drying tower, specifically as Figure 6 shown, it is a schematic flowchart corresponding to this method, which specifically includes the following steps:

[0185] Step 601, determine the actual hydrogen processing capacity of the main drying tower according to the real-time hydrogen flow rate entering the hydrogen purification system, the actual heating duration of the regenerative drying tower, and the preset cold blow duration.

[0186] Step 602, determine whether the actual hydrogen processing capacity of the main drying tower is greater than or equal to the maximum hydrogen processing capacity of the main drying tower. If the actual hydrogen processing capacity of the main drying tower is greater than or equal to the maximum hydrogen processing capacity of the main drying tower, then execute Step 603; otherwise, execute Step 604.

[0187] Step 603, control the main drying tower and the regenerative drying tower to perform a status switch.

[0188] Step 604: Determine whether the actual hydrogen processing capacity of the main drying tower is greater than the theoretical hydrogen processing capacity of the main drying tower during the heating stage. If the actual hydrogen processing capacity of the main drying tower is greater than the theoretical hydrogen processing capacity of the main drying tower during the heating stage, then execute Step 605; otherwise, return to Step 601.

[0189] Among them, the theoretical hydrogen processing capacity of the main drying tower during the heating stage can be determined according to the maximum hydrogen processing capacity of the main drying tower, the preset working cycle duration, and the preset heating duration.

[0190] Specifically, the theoretical hydrogen processing capacity of the main drying tower during the heating stage can be determined by the following formula (11):

[0191]

[0192] In formula (11), m D,s is the theoretical hydrogen processing capacity of the main drying tower during the heating stage; m D,m is the maximum hydrogen processing capacity of the main drying tower; t is the working cycle duration; t h is the preset heating duration. Among them, m D,m can be determined according to the above formula (7) or formula (8).

[0193] Step 605: Increase the intake air volume of the regeneration drying tower.

[0194] The specifically increased intake air volume can be determined according to the actual situation, such as according to the opening range of the valve, the structure of the drying tower, the correspondence between hydrogen flow rate and heat exchange efficiency, etc. The specific situation is not limited.

[0195] Based on the same inventive concept, as Figure 7 shown, an embodiment of the present application also discloses a controller, 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 regeneration drying tower in the regeneration state. The controller includes:

[0196] A judgment module 171, configured to judge whether the actual heating duration of the regeneration drying tower is greater than or equal to the theoretical heating duration of the regeneration drying tower;

[0197] A control module 172, configured to control the regeneration drying tower to enter the cold blow stage if the actual heating duration is greater than or equal to the theoretical heating duration;

[0198] Among them, the theoretical heating duration is determined according to the historical hydrogen processing capacity of the regeneration drying tower and the rated hydrogen processing capacity of the regeneration drying tower, or is determined according to the historical hydrogen processing capacity of the main drying tower, the maximum hydrogen processing capacity of the main drying tower, and the preset heating duration.

[0199] Optionally, the historical hydrogen processing capacity of the regeneration drying tower is determined as follows:

[0200]

[0201] where m R,h is the historical hydrogen processing capacity of the regeneration drying tower; is the real-time hydrogen flow rate entering the regeneration drying tower at the i-th moment of the historical working cycle; t is the preset duration of the working cycle;

[0202] The rated hydrogen processing capacity of the regeneration drying tower is determined as follows:

[0203]

[0204] where m R,r is the rated hydrogen processing capacity of the regeneration drying tower; M n is the rated hydrogen production of the n-th electrolyzer; n is the number of electrolyzers; x is the proportion of the regeneration gas volume of the regeneration drying tower to the rated hydrogen processing capacity of the main drying tower;

[0205] The theoretical heating duration is determined as follows:

[0206]

[0207] where t h,t is the theoretical heating duration; m R,h is the historical hydrogen processing capacity of the regeneration drying tower; m R,r is the rated hydrogen processing capacity of the regeneration drying tower.

[0208] Optionally, the historical hydrogen processing capacity of the main drying tower is determined as follows:

[0209]

[0210] where m D,h is the historical hydrogen processing capacity of the main drying tower; is the real-time hydrogen flow rate entering the hydrogen purification system at the i-th moment of the historical working cycle; t is the preset duration of the working cycle;

[0211] The maximum hydrogen processing capacity of the main drying tower is determined as follows:

[0212]

[0213] where m D,m is the maximum hydrogen processing capacity of the main drying tower; p is the proportion corresponding to the maximum load; t is the preset duration of the working cycle; M nis the rated hydrogen production of the nth electrolytic cell; n is the number of electrolytic cells;

[0214] The theoretical heating duration is determined by the following method:

[0215]

[0216] where t h,t is the theoretical heating duration; m D,h is the historical hydrogen processing capacity of the main drying tower; m D,m is the maximum hydrogen processing capacity of the main drying tower; t h is the preset heating duration.

[0217] Optionally, the controller further includes:

[0218] An acquisition module 173, configured to acquire the actual working duration of the cold blow stage of the regeneration drying tower;

[0219] The judgment module 171 is further configured to judge whether the actual working duration of the cold blow stage reaches the preset cold blow duration;

[0220] The control module 172 is further configured to, if the actual working duration of the cold blow stage reaches the preset cold blow duration, control the main drying tower and the regeneration drying tower to perform a state switch.

[0221] Optionally, the controller further includes:

[0222] A processing module 174, configured to determine the actual hydrogen processing capacity of the main drying tower according to the real-time hydrogen flow rate entering the hydrogen purification system, the actual heating duration of the regeneration drying tower, and the preset cold blow duration;

[0223] The judgment module 171 is further configured to judge whether the actual hydrogen processing capacity of the main drying tower is greater than or equal to the maximum hydrogen processing capacity of the main drying tower;

[0224] The control module 172 is further configured to, if the actual hydrogen processing capacity of the main drying tower is greater than or equal to the maximum hydrogen processing capacity of the main drying tower, control the main drying tower and the regeneration drying tower to perform a state switch.

[0225] Optionally, the actual hydrogen processing capacity of the main drying tower is determined by the following method:

[0226]

[0227] where m D,a is the actual hydrogen processing capacity of the main drying tower; t h,a is the actual heating duration of the regeneration drying tower; tc is the preset cold blow duration; is the real-time hydrogen flow rate entering the hydrogen purification system at the i-th moment in the current working cycle.

[0228] Optionally, the determination module 171 is further configured to:

[0229] If the actual hydrogen processing capacity of the main drying tower is less than the maximum hydrogen processing capacity of the main drying tower, determine whether the actual hydrogen processing capacity of the main drying tower is greater than the theoretical hydrogen processing capacity of the main drying tower during the heating stage;

[0230] The control module 172 is further configured to increase the intake air volume of the regeneration drying tower if the actual hydrogen processing capacity of the main drying tower is greater than the theoretical hydrogen processing capacity of the main drying tower during the heating stage;

[0231] Wherein, the theoretical hydrogen processing capacity of the main drying tower during the heating stage is determined according to the maximum hydrogen processing capacity of the main drying tower, the preset working cycle duration, and the preset heating duration.

[0232] Optionally, the theoretical hydrogen processing capacity of the main drying tower during the heating stage is determined by the following method:

[0233]

[0234] Wherein, m D,s is the theoretical hydrogen processing capacity of the main drying tower during the heating stage; m D,m is the maximum hydrogen processing capacity of the main drying tower; t is the preset working cycle duration; t h is the preset heating duration.

[0235] Optionally, the hydrogen purification system further includes a secondary drying tower in a secondary working state;

[0236] The control module 172 is specifically configured to:

[0237] Control the main drying tower, the secondary drying tower, and the regeneration drying tower to perform state switching.

[0238] 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 a main working state, a regeneration drying tower in a regeneration state, and the controller described above.

[0239] Based on the same inventive concept, an embodiment of the present application also discloses a terminal device, which includes 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.

[0240] Based on the same inventive concept, an embodiment of the present application also discloses a computer-readable storage medium storing a computer program, which when executed by a processor implements the method as described above.

[0241] 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.

[0242] 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.

[0243] 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 operation 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.

[0244] The following components are connected to the I / O interface: an input section including a keyboard, a mouse, etc.; an output section including a cathode ray tube (CRT), a liquid crystal display (LCD), etc. and a speaker, etc.; a storage section including a hard disk, etc.; and a communication section including a network interface card such as a LAN card, a modem, etc. The communication section 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 program read from them can be installed in the storage section as needed.

[0245] In particular, 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 includes a computer program tangibly embodied 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 section and / or installed from a removable medium.

[0246] 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.

[0247] For convenience of description, the above-described apparatus is described by function as various units. Of course, when implementing the present application, the functions of each unit can be implemented in one or more software and / or hardware.

[0248] The present application is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to embodiments of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and combinations of flows and / or blocks in the flowcharts and / or block diagrams can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing device generate means for implementing the functions specified in one Figure 1 one or more flows and / or blocks Figure 1 one or more blocks.

[0249] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to operate in a particular manner, such that the instructions stored in the computer-readable memory produce a manufacture including instruction means that implement the functions specified in one or more of the processes Figure 1 steps or a plurality of steps and / or blocks Figure 1 blocks or a plurality of blocks.

[0250] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus, such that a series of operational steps are performed on the computer or other programmable apparatus to produce a computer-implemented process, whereby the instructions executed on the computer or other programmable apparatus provide steps for implementing the functions specified in one or more of the processes Figure 1 steps or a plurality of steps and / or blocks Figure 1 blocks or a plurality of blocks.

[0251] It should also be noted that the term "comprising", "including" or any other variation thereof is intended to cover a non-exclusive inclusion, such that a process, method, article or apparatus comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or apparatus. Without further limitation, an element defined by the phrase "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising the element.

[0252] Those skilled in the art will appreciate that the embodiments of the present application may be provided as a method, system or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Moreover, the present application may 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.) that contain computer-usable program code.

[0253] The present 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 particular tasks or implement particular 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 both local and remote computer storage media including storage devices.

[0254] 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, and the differences between each embodiment and other embodiments are emphasized. In particular, for the system embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and reference can be made to the relevant parts of the method embodiments for the related content.

[0255] The above description is only for the embodiments of the present application and is not intended to limit the present application. For those skilled in the art, various modifications and changes 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 control method for a regeneration drying tower in a hydrogen purification system, characterized in that, Applied to the hydrogen purification system, the hydrogen purification system includes a main drying tower in the main working state and a regenerative drying tower in the regeneration state, and the method includes: Judging whether the actual heating duration of the regenerative drying tower is greater than or equal to the theoretical heating duration of the regenerative drying tower; If the actual heating duration is greater than or equal to the theoretical heating duration, controlling the regenerative drying tower to enter the cold blow stage; Wherein, the theoretical heating duration is determined according to the historical hydrogen processing capacity of the regenerative drying tower and the rated hydrogen processing capacity of the regenerative drying tower, or is determined according to the historical hydrogen processing capacity of the main drying tower, the maximum hydrogen processing capacity of the main drying tower, and a preset heating duration.

2. The control method according to claim 1, wherein The historical hydrogen processing capacity of the regenerative drying tower is determined by the following method: Wherein, m R,h is the historical hydrogen processing capacity of the regeneration drying tower; is the real-time hydrogen flow rate entering the regeneration drying tower at the i-th moment of the historical working cycle; t is the preset duration of the working cycle; The rated hydrogen processing capacity of the regenerative drying tower is determined by the following method: where m R,r is the rated hydrogen processing capacity of the regeneration drying tower; M n is the rated hydrogen production of the nth electrolyzer; n is the number of electrolyzers; x is the proportion of the regeneration gas volume of the regeneration drying tower to the rated hydrogen processing capacity of the main drying tower. The theoretical heating duration is determined by the following method: Among them, t h,t is the theoretical heating duration; m R,h is the historical hydrogen processing capacity of the regeneration drying tower; m R,r is the rated hydrogen processing capacity of the regeneration drying tower.

3. The control method according to claim 1, characterized in that, The historical hydrogen processing capacity of the main drying tower is determined by the following method: where m D,h is the historical hydrogen processing capacity of the main drying tower; is the real-time hydrogen flow rate entering the hydrogen purification system at the i-th moment of the historical working cycle; t is the preset duration of the working cycle; The maximum hydrogen processing capacity of the main drying tower is determined by the following method: where m D,m is the maximum hydrogen processing capacity of the main drying tower; p is the ratio corresponding to the maximum load; t is the preset working cycle duration; M n is the rated hydrogen production of the nth electrolytic cell; n is the number of electrolytic cells; The theoretical heating duration is determined by the following method: where t h,t is the theoretical heating duration; m D,h is the historical hydrogen processing volume of the main drying tower; m D,m is the maximum hydrogen processing volume of the main drying tower; t h is the preset heating duration.

4. The control method according to claim 1, wherein After controlling the regenerative drying tower to be in the cold blow stage, the method further includes: Obtaining the actual working duration of the cold blow stage of the regenerative drying tower; Judging whether the actual working duration of the cold blow stage reaches the preset cold blow duration. If the actual working duration of the cold blow stage reaches the preset cold blow duration, controlling the main drying tower and the regenerative drying tower to perform a state switch.

5. The control method according to claim 1, wherein After controlling the regenerative drying tower to be in the cold blow stage, the method further includes: Determining the actual hydrogen processing capacity of the main drying tower according to the real-time hydrogen flow rate entering the hydrogen purification system, the actual heating duration of the regenerative drying tower, and the preset cold blow duration; Judging whether the actual hydrogen processing capacity of the main drying tower is greater than or equal to the maximum hydrogen processing capacity of the main drying tower. If the actual hydrogen processing capacity of the main drying tower is greater than or equal to the maximum hydrogen processing capacity of the main drying tower, controlling the main drying tower and the regenerative drying tower to perform a state switch.

6. The method according to claim 5, characterized in that The actual hydrogen processing capacity of the main drying tower is determined by the following method: where m D,a is the actual hydrogen processing capacity of the main drying tower; t h,a is the actual heating duration of the regeneration drying tower; t c is the preset cold blow duration; is the real-time hydrogen flow rate entering the hydrogen purification system at the i-th moment of the current working cycle.

7. The method according to claim 5, wherein The method further includes: If the actual hydrogen processing capacity of the main drying tower is less than the maximum hydrogen processing capacity of the main drying tower, judging whether the actual hydrogen processing capacity of the main drying tower is greater than the theoretical hydrogen processing capacity of the main drying tower during the heating stage; If the actual hydrogen processing capacity of the main drying tower is greater than the theoretical hydrogen processing capacity of the main drying tower during the heating stage, increasing the intake air volume of the regenerative drying tower; Wherein, the theoretical hydrogen processing capacity of the main drying tower during the heating stage is determined according to the maximum hydrogen processing capacity of the main drying tower, the preset working cycle duration, and the preset heating duration.

8. The method according to claim 7, characterized in that, The theoretical hydrogen processing capacity of the main drying tower during the heating stage is determined by the following method: Among them, m D,s is the theoretical hydrogen processing capacity of the main drying tower during the heating stage; m D,m is the maximum hydrogen processing capacity of the main drying tower; t is the preset working cycle duration; t h is the preset heating duration.

9. The method according to any one of claims 4 to 8, characterized in that The hydrogen purification system further includes a secondary drying tower in the secondary working state; Controlling the state switch of the main drying tower and the regenerative drying tower includes: Controlling the state switch of the main drying tower, the secondary drying tower, and the regenerative drying tower.

10. A controller, characterized in that, Applied to a hydrogen purification system, the hydrogen purification system includes a main drying tower in the main working state and a regenerative drying tower in the regenerative state, and the controller includes: A judgment module, configured to judge whether the actual heating duration of the regenerative drying tower is greater than or equal to the theoretical heating duration of the regenerative drying tower; A control module, configured to control the regenerative drying tower to enter the cold blow stage if the actual heating duration is greater than or equal to the theoretical heating duration; Wherein, the theoretical heating duration is determined according to the historical hydrogen processing amount of the regenerative drying tower and the rated hydrogen processing amount of the regenerative drying tower, or is determined according to the historical hydrogen processing amount of the main drying tower, the maximum hydrogen processing amount of the main drying tower, and a preset heating duration.

11. A hydrogen purification system, characterized in that, The hydrogen purification system includes a main drying tower in the main working state, a regenerative drying tower in the regenerative state, and the controller as claimed in claim 10.

12. 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 as claimed in any one of claims 1 to 9 is implemented.

13. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, the method as claimed in any one of claims 1 to 9 is implemented.

Images